INTERNATIONAL ISO

STANDARD 11783-6

Third edition
2014-07-01

Tractors and machinery for agriculture

and forestry — Serial control and
communications data network —
Part 6:
Virtual terminal
Tracteurs et machines agricoles et forestiers — Réseaux de commande
et de communication de données en série —
Partie 6: Terminal virtuel

Reference number
ISO 11783-6:2014(E)

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 ISO 11783-6:2014(E)

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 ISO 11783-6:2014(E)

Contents Page

Foreword ..........................................................................................................................................................xiii
Introduction.......................................................................................................................................................xv
1 Scope ......................................................................................................................................................1
2 Normative references............................................................................................................................1
3 Terms and definitions ...........................................................................................................................1
4 Technical requirements ........................................................................................................................5
4.1 Overview.................................................................................................................................................5
4.2 Operator input and control ...................................................................................................................7
4.3 Acoustic alarm .......................................................................................................................................9
4.4 Coordinate system ................................................................................................................................9
4.5 Display areas .........................................................................................................................................9
4.5.1 General ...................................................................................................................................................9
4.5.2 Data Mask ...............................................................................................................................................9
4.5.3 Soft Key Mask area and Soft Key designators ...................................................................................9
4.6 Behaviour .............................................................................................................................................13
4.6.1 Object pools .........................................................................................................................................13
4.6.2 Working Sets........................................................................................................................................13
4.6.3 Multiple Visually Similar Working Sets .............................................................................................15
4.6.4 Displayed Working Set number .........................................................................................................16
4.6.5 Language, formats and measurement units selection ....................................................................16
4.6.6 Initialization ..........................................................................................................................................17
4.6.7 System Shutdown ...............................................................................................................................18
4.6.8 Working Set object and active masks ...............................................................................................20
4.6.9 Connection management....................................................................................................................22
4.6.10 Updating the operator interface .........................................................................................................25
4.6.11 Special objects ....................................................................................................................................25
4.6.12 Relative X/Y positions .........................................................................................................................30
4.6.13 Overlaid objects...................................................................................................................................31
4.6.14 Alarm handling ....................................................................................................................................32
4.6.15 Clipping ................................................................................................................................................33
4.6.16 Scaling ..................................................................................................................................................34
4.6.17 Operator input......................................................................................................................................34
4.6.18 Soft Key and Button activation ..........................................................................................................37
4.6.19 Font rendering .....................................................................................................................................38
4.6.20 Object Rendering Accuracy, Quality and VT Developer Freedom .................................................47
4.6.21 Filling output shape objects...............................................................................................................48
4.6.22 Events ...................................................................................................................................................49
4.6.23 Touch screens and pointing devices ................................................................................................50
4.6.24 Proprietary Means ...............................................................................................................................51
4.6.25 VT Number ...........................................................................................................................................51
4.6.26 Packet Padding ....................................................................................................................................51
4.7 Displaying Data from Multiple Working Sets on One Mask ............................................................51
4.7.1 General .................................................................................................................................................51
4.7.2 User-Layout Data Mask.......................................................................................................................52
4.7.3 Window Mask object ...........................................................................................................................53
4.7.4 Window Mask content.........................................................................................................................53
4.7.5 Window Cell Size and Borders...........................................................................................................55
4.7.6 Window Mask Scaling .........................................................................................................................55
4.7.7 Using Window Masks Outside of User-Layout Data Masks............................................................56

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 ISO 11783-6:2014(E)

4.7.8 User-Layout Soft Key Mask ................................................................................................................56

4.7.9 Key Group Objects ..............................................................................................................................57
4.7.10 Key Cell Size and Borders ..................................................................................................................58
4.7.11 Key Group Scaling...............................................................................................................................58
4.7.12 Using Key Group Objects outside of User-Layout Soft Key Masks ...............................................58

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4.7.13 Operator Inputs ....................................................................................................................................59
4.7.14 Refreshing On Screen Data ................................................................................................................59
4.7.15 Look and Feel.......................................................................................................................................60
4.7.16 Uploading New Window Mask and Key Group objects ...................................................................61
Annex A (normative) Object, event, colour and command codes ..............................................................63
A.1 Object types .........................................................................................................................................63
A.1.1 General..................................................................................................................................................63
A.1.2 Nomenclature .......................................................................................................................................65
A.1.3 Object relationships ............................................................................................................................66
A.2 Event types...........................................................................................................................................68
A.3 VT standard colour palette .................................................................................................................70
A.4 Command/parameter code summary ................................................................................................72
Annex B (normative) Object definitions ........................................................................................................78
B.1 Working Set object ..............................................................................................................................78
B.2 Data Mask object..................................................................................................................................81
B.3 Alarm Mask object ...............................................................................................................................83
B.4 Container object...................................................................................................................................86
B.5 Soft Key Mask object...........................................................................................................................88
B.6 Key object.............................................................................................................................................89
B.7 Button object........................................................................................................................................91
B.8 Input field objects ................................................................................................................................95
B.8.1 General..................................................................................................................................................95
B.8.2 Input Boolean object ...........................................................................................................................97
B.8.3 Input String object ...............................................................................................................................98
B.8.4 Input Number object ..........................................................................................................................101
B.8.5 Input List object .................................................................................................................................104
B.9 Output field objects ...........................................................................................................................108
B.9.1 General................................................................................................................................................108
B.9.2 Output String object ..........................................................................................................................109
B.9.3 Output Number object .......................................................................................................................110
B.9.4 Output List object ..............................................................................................................................113
B.10 Output shape objects ........................................................................................................................115
B.10.1 General................................................................................................................................................115
B.10.2 Output Line object .............................................................................................................................115
B.10.3 Output Rectangle object ...................................................................................................................118
B.10.4 Output Ellipse object .........................................................................................................................120
B.10.5 Output Polygon object ......................................................................................................................123
B.11 Output graphic objects .....................................................................................................................125
B.11.1 General................................................................................................................................................125
B.11.2 Output Meter object ...........................................................................................................................125
B.11.3 Output Linear Bar Graph object .......................................................................................................129
B.11.4 Output Arched Bar Graph object .....................................................................................................133
B.12 Picture Graphic object ......................................................................................................................137
B.12.1 General................................................................................................................................................137
B.12.2 Picture Graphic object raw data format and compression ...........................................................139
B.13 Variable objects .................................................................................................................................139
B.13.1 General................................................................................................................................................139
B.13.2 Number Variable object.....................................................................................................................140
B.13.3 String Variable object ........................................................................................................................140
B.14 Attribute objects ................................................................................................................................141
B.14.1 General................................................................................................................................................141
B.14.2 Font Attributes object .......................................................................................................................141
B.14.3 Line Attributes object ........................................................................................................................143

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 ISO 11783-6:2014(E)

B.14.4 Fill Attributes object..........................................................................................................................145

B.14.5 Input Attributes object ......................................................................................................................147
B.14.6 Extended Input Attributes object .....................................................................................................148
B.15 Object Pointer object ........................................................................................................................151
B.16 Macro object ......................................................................................................................................151
B.17 Colour Map object .............................................................................................................................152
B.18 Graphics Context object ...................................................................................................................154
B.19 Window Mask object .........................................................................................................................158
B.19.1 General ...............................................................................................................................................158
B.19.2 Window Mask Window Types ..........................................................................................................163
B.20 Key Group object...............................................................................................................................182
B.21 Object Label Reference List object .................................................................................................184
B.22 External Object Definition object .....................................................................................................185
B.23 External Reference NAME object.....................................................................................................186
B.24 External Object Pointer object .........................................................................................................187
B.25 Animation object ...............................................................................................................................188
Annex C (normative) Object transport protocol.........................................................................................192
C.1 Virtual terminal messages and object transfer ..............................................................................192
C.2 Building object pools ........................................................................................................................192
C.2.1 General ...............................................................................................................................................192
C.2.2 Object pool transfer procedure........................................................................................................193
C.2.3 Object pool transfer message ..........................................................................................................194
C.2.4 End of Object Pool message ............................................................................................................194
C.2.5 End of Object Pool response ...........................................................................................................195
C.2.6 Updating pools at runtime ................................................................................................................195
Annex D (normative) Technical data messages.........................................................................................197
D.1 General ...............................................................................................................................................197
D.2 Get Memory message .......................................................................................................................197
D.3 Get Memory response.......................................................................................................................198
D.4 Get Number of Soft Keys message .................................................................................................199
D.5 Get Number of Soft Keys response.................................................................................................199
D.6 Get Text Font Data message ............................................................................................................199
D.7 Get Text Font Data response ...........................................................................................................200
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D.8 Get Hardware message.....................................................................................................................200

D.9 Get Hardware response ....................................................................................................................201
D.10 Get Supported Widechars message................................................................................................201
D.11 Get Supported WideChars response...............................................................................................202
D.12 Get Window Mask Data message ....................................................................................................203
D.13 Get Window Mask Data response....................................................................................................203
D.14 Get Supported Objects message.....................................................................................................203
D.15 Get Supported Objects response ....................................................................................................204
Annex E (normative) Non-volatile memory operations commands .........................................................205
E.1 General ...............................................................................................................................................205
E.1.1 Introduction........................................................................................................................................205
E.1.2 Version Management – VT version 4 and prior ..............................................................................206
E.1.3 Version Management – VT version 5 and later...............................................................................206
E.2 Get Versions message ......................................................................................................................206
E.3 Get Versions response .....................................................................................................................206
E.4 Store Version command ...................................................................................................................206
E.5 Store Version response ....................................................................................................................207
E.6 Load Version command....................................................................................................................207
E.7 Load Version response.....................................................................................................................207
E.8 Delete Version command..................................................................................................................208
E.9 Delete Version response...................................................................................................................208
E.10 Extended Get Versions message.....................................................................................................208
E.11 Extended Get Versions response ....................................................................................................209
E.12 Extended Store Version command..................................................................................................209

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 ISO 11783-6:2014(E)

E.13 Extended Store Version response ...................................................................................................209

E.14 Extended Load Version command...................................................................................................210
E.15 Extended Load Version response....................................................................................................210
E.16 Extended Delete Version command.................................................................................................211
E.17 Extended Delete Version response..................................................................................................211
Annex F (normative) Command and Macro messages..............................................................................212
F.1 General................................................................................................................................................212
F.2 Hide/Show Object command ............................................................................................................212
F.3 Hide/Show Object response .............................................................................................................212
F.4 Enable/Disable Object command .....................................................................................................213
F.5 Enable/Disable Object response ......................................................................................................213
F.6 Select Input Object command ..........................................................................................................213
F.7 Select Input Object response ...........................................................................................................214
F.8 ESC command....................................................................................................................................215
F.9 ESC response.....................................................................................................................................215
F.10 Control Audio Signal command .......................................................................................................215
F.11 Control Audio Signal response ........................................................................................................217
F.12 Set Audio Volume command ............................................................................................................217
F.13 Set Audio Volume response .............................................................................................................218
F.14 Change Child Location command....................................................................................................218
F.15 Change Child Location response.....................................................................................................219
F.16 Change Child Position command ....................................................................................................219
F.17 Change Child Position response .....................................................................................................219
F.18 Change Size command .....................................................................................................................220
F.19 Change Size response ......................................................................................................................220
F.20 Change Background Colour command ...........................................................................................220
F.21 Change Background Colour response ............................................................................................221
F.22 Change Numeric Value command....................................................................................................221
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F.23 Change Numeric Value response.....................................................................................................222

F.24 Change String Value command........................................................................................................223
F.25 Change String Value response.........................................................................................................224
F.26 Change End Point command............................................................................................................224
F.27 Change End Point response.............................................................................................................224
F.28 Change Font Attributes command...................................................................................................225
F.29 Change Font Attributes response....................................................................................................225
F.30 Change Line Attributes command ...................................................................................................225
F.31 Change Line Attributes response ....................................................................................................226
F.32 Change Fill Attributes command .....................................................................................................226
F.33 Change Fill Attributes response ......................................................................................................227
F.34 Change Active Mask command........................................................................................................227
F.35 Change Active Mask response.........................................................................................................227
F.36 Change Soft Key Mask command ....................................................................................................228
F.37 Change Soft Key Mask response .....................................................................................................228
F.38 Change Attribute command..............................................................................................................228
F.39 Change Attribute response...............................................................................................................229
F.40 Change Priority command ................................................................................................................229
F.41 Change Priority response .................................................................................................................230
F.42 Change List Item command..............................................................................................................230
F.43 Change List Item response...............................................................................................................230
F.44 Delete Object Pool command ...........................................................................................................231
F.45 Delete Object Pool response ............................................................................................................231
F.46 Lock/Unlock Mask command ...........................................................................................................231
F.47 Lock/Unlock Mask response ............................................................................................................233
F.48 Execute Macro command .................................................................................................................233
F.49 Execute Macro response ..................................................................................................................233
F.50 Change Object Label command .......................................................................................................234
F.51 Change Object Label response ........................................................................................................234
F.52 Change Polygon Point command ....................................................................................................235

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F.53 Change Polygon Point response .....................................................................................................235

F.54 Change Polygon Scale command....................................................................................................236
F.55 Change Polygon Scale response.....................................................................................................236
F.56 Graphics Context command ............................................................................................................237
F.57 Graphics Context response .............................................................................................................241
F.58 Get Attribute Value message ...........................................................................................................241
F.59 Get Attribute Value response ...........................................................................................................242
F.60 Select Colour Map command ...........................................................................................................242
F.61 Select Colour Map response ............................................................................................................243
F.62 Identify VT message..........................................................................................................................243
F.63 Identify VT response .........................................................................................................................244
F.64 Execute Extended Macro command................................................................................................244
F.65 Execute Extended Macro response.................................................................................................244
F.66 Unsupported VT Function message................................................................................................245
F.67 VT Unsupported VT Function message ..........................................................................................245
Annex G (normative) Status Messages.......................................................................................................246
G.1 General ...............................................................................................................................................246
G.2 VT Status message............................................................................................................................246
G.3 Working Set Maintenance message ................................................................................................246

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Annex H (normative) Activation messages ................................................................................................248
H.1 General ...............................................................................................................................................248
H.2 Soft Key Activation message ...........................................................................................................248
H.3 Soft Key Activation response ..........................................................................................................248
H.4 Button Activation message ..............................................................................................................249
H.5 Button Activation response..............................................................................................................249
H.6 Pointing Event message ...................................................................................................................250
H.7 Pointing Event response ..................................................................................................................251
H.8 VT Select Input Object message......................................................................................................251
H.9 VT Select Input Object response .....................................................................................................252
H.10 VT ESC message ...............................................................................................................................252
H.11 VT ESC response...............................................................................................................................252
H.12 VT Change Numeric Value message ...............................................................................................253
H.13 VT Change Numeric Value response...............................................................................................253
H.14 VT Change Active Mask message ...................................................................................................253
H.15 VT Change Active Mask response...................................................................................................254
H.16 VT Change Soft Key Mask message................................................................................................254
H.17 VT Change Soft Key Mask response ...............................................................................................255
H.18 VT Change String Value message ...................................................................................................255
H.19 VT Change String Value response...................................................................................................255
H.20 VT On User-Layout Hide/Show message ........................................................................................256
H.21 VT On User-Layout Hide/Show response .......................................................................................256
H.22 VT Control Audio Signal Termination message .............................................................................257
Annex I (normative) Other messages..........................................................................................................258
Annex J (normative) Auxiliary control ........................................................................................................259
J.1 General ...............................................................................................................................................259
J.2 Auxiliary Inputs..................................................................................................................................259
J.3 Auxiliary controls in multiple VT environments.............................................................................260
J.3.1 General rules......................................................................................................................................260
J.3.2 Primary VT and resolving VT function instance zero ....................................................................260
J.4 Defining auxiliary inputs and functions ..........................................................................................261
J.4.1 General ...............................................................................................................................................261
J.4.2 Auxiliary Function Type 1 object .....................................................................................................261
J.4.3 Auxiliary Function Type 2 object .....................................................................................................262
J.4.4 Auxiliary Input Type 1 object............................................................................................................263
J.4.5 Auxiliary Input Type 2 object............................................................................................................264
J.4.6 Auxiliary Function Type 2 types ......................................................................................................265
J.4.7 Auxiliary Control Designator Type 2 Object Pointer .....................................................................269

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 ISO 11783-6:2014(E)

J.5 Automatic Auxiliary Control assignment ........................................................................................274

J.6 Manual Auxiliary Control assignment .............................................................................................276
J.7 Auxiliary control messages ..............................................................................................................279
J.7.1 General................................................................................................................................................279
J.7.2 Auxiliary Assignment Type 1 command .........................................................................................279
J.7.3 Auxiliary Assignment Type 1 response ..........................................................................................279
J.7.4 Auxiliary Input Type 1 status............................................................................................................280
J.7.5 Auxiliary Assignment Type 2 command .........................................................................................280
J.7.6 Auxiliary Assignment Type 2 response ..........................................................................................283
J.7.7 Preferred Assignment command .....................................................................................................283
J.7.8 Preferred Assignment response ......................................................................................................286
J.7.9 Auxiliary Input Type 2 Status message ...........................................................................................287
J.7.10 Auxiliary Input Type 2 Maintenance message ................................................................................288
J.7.11 Auxiliary Input Status Type 2 Enable command ............................................................................289
J.7.12 Auxiliary Input Status Type 2 Enable response .............................................................................290
J.7.13 Auxiliary Capabilities request ..........................................................................................................290
J.7.14 Auxiliary Capabilities response .......................................................................................................290
J.8 Learn Mode.........................................................................................................................................291
Annex K (normative) Extended transport protocol ....................................................................................293
K.1 General................................................................................................................................................293
Annex L (normative) Character sets ............................................................................................................294
Bibliography ....................................................................................................................................................302
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 ISO 11783-6:2014(E)

Table of Tables
Table 1 — VT Response message behavior......................................................................................................15
Table 2 — Working Set state changes (VT Supports only Active Mask) ...........................................................21
Table 3 — Working Set state changes (VT Supports Multiple Working Sets or Window Masks Visible
Simultaneously)...........................................................................................................................................22
Table 4 — VT behaviour on mask transition ......................................................................................................33
Table 5 — VT Reaction to navigation and data input events .............................................................................35
Table 6 — VT Behavior When New Window Mask or Key Group Object is Uploaded......................................62
Table A.1 — Virtual terminal objects ..................................................................................................................63
Table A.2 — Allowed hierarchical relationships of objects.................................................................................67
Table A.3 — Event summary..............................................................................................................................69
Table A.4 — Standard VT RGB colour palette...................................................................................................70
Table A.5 — Command/parameter summary.....................................................................................................73
Table B.1 — Working Set events .......................................................................................................................78
Table B.2 — Working Set attributes and record format .....................................................................................80
Table B.3 — Data Mask events..........................................................................................................................81
Table B.4 — Data mask attributes and record format........................................................................................82
Table B.5 — Alarm Mask events ........................................................................................................................83
Table B.6 — Alarm Mask attributes and record format ......................................................................................85
Table B.7 — Container events ...........................................................................................................................86
Table B.8 — Container attributes and record format .........................................................................................87
Table B.9 — Soft Key Mask events....................................................................................................................88
Table B.10 — Soft Key Mask attributes and record format................................................................................88
Table B.11 — Key events...................................................................................................................................89
Table B.12 — Key attributes and record format .................................................................................................90
Table B.13 — Button events...............................................................................................................................92
Table B.14 — Button attributes and record format.............................................................................................93
Table B.15 — Input events .................................................................................................................................96
Table B.16 — Input Boolean attributes and record format.................................................................................98
Table B.17 — Input String attributes and record format.....................................................................................99
Table B.18 — Input Number attributes and record format ...............................................................................102
Table B.19 — Input List events ........................................................................................................................105
Table B.20 — Input List attributes and record format.......................................................................................107
Table B.21 — Output field events ....................................................................................................................108
Table B.22 — Output String attributes and record format................................................................................109
Table B.23 — Output Number attributes and record format ............................................................................111
Table B.24 — Output List events......................................................................................................................113
Table B.25 — Output List attributes and record format....................................................................................113
Table B.26 — Output Line events ....................................................................................................................116
Table B.27 — Output Line attributes and record format ..................................................................................116
Table B.28 — Output Rectangle Events ..........................................................................................................118
Table B.29 — Output Rectangle attributes and record format .........................................................................119
Table B.30 — Output Ellipse events ................................................................................................................121
Table B.31 — Output Ellipse attributes and record format...............................................................................121
Table B.32 — Output Polygon events ..............................................................................................................124
Table B.33 — Output Polygon attributes and record format ............................................................................124
Table B.34 — Output Meter events ..................................................................................................................127
Table B.35 — Output Meter attributes and record format ................................................................................127
Table B.36 — Output Linear Bar Graph events ...............................................................................................131
Table B.37 — Output Linear Bar Graph attributes and record format..............................................................131
Table B.38 — Output Arched Bar Graph events ..............................................................................................134
Table B.39 — Output Arched Bar Graph attributes and record format ............................................................135
Table B.40 — Picture Graphic events ..............................................................................................................137
Table B.41 — Picture Graphic attributes and record format ............................................................................137

© ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

Table B.42 — Variable events ......................................................................................................................... 140

Table B.43 — Number Variable attributes and record format ......................................................................... 140
Table B.44 — String Variable attributes and record format............................................................................. 140
Table B.45 — Font Attributes events............................................................................................................... 141
Table B.46 — Font Attributes attributes and record format............................................................................. 142
Table B.47 — Line Attributes events ............................................................................................................... 144
Table B.48 — Line Attributes attributes and record format ............................................................................. 144

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Table B.49 — Fill Attributes events ................................................................................................................. 146
Table B.50 — Fill Attributes attributes and record format................................................................................ 146
Table B.51 — Input Attributes events .............................................................................................................. 147
Table B.52 — Input Attributes attributes and record format ............................................................................ 148
Table B.53 — Extended Input Attributes attributes and record format............................................................ 150
Table B.54 — Object Pointer events ............................................................................................................... 151
Table B.55 — Object Pointer attributes and record format.............................................................................. 151
Table B.56 — Macro attributes and record format .......................................................................................... 152
Table B.57 — Colour Map attributes and record format.................................................................................. 153
Table B.58 — Graphics Context events .......................................................................................................... 156
Table B.59 — Graphics Context attributes and record format ........................................................................ 157
Table B.60 — Window Mask events................................................................................................................ 159
Table B.61 — Window Mask attributes and record format .............................................................................. 160
Table B.62 — Key Group events ..................................................................................................................... 182
Table B.63 — Key Group attributes and record format ................................................................................... 182
Table B.64 — Object Label Reference List attributes and record format........................................................ 184
Table B.65 — External Object Definition events ............................................................................................. 185
Table B.66 — External Object Definition attributes and record format............................................................ 185
Table B.67 — External Reference NAME events ............................................................................................ 186
Table B.68 — External Reference NAME attributes and record format .......................................................... 186
Table B.69 — External Object Pointer events ................................................................................................. 187
Table B.70 — External Object Pointer attributes and record format ............................................................... 187
Table B.71 — Animation events ...................................................................................................................... 189
Table B.72 — Animation attributes and record format .................................................................................... 190
Table F.1 — Graphic command summary....................................................................................................... 238
Table J.1 — Auxiliary Function Type 1 attributes and record format .............................................................. 261
Table J.2 — Auxiliary Function Type 2 attributes and record format .............................................................. 262
Table J.3 — Auxiliary Input Type 1 attributes and record format .................................................................... 264
Table J.4 — Auxiliary Input Type 2 attributes and record format .................................................................... 265
Table J.5 — Auxiliary Function Type 2 types .................................................................................................. 266
Table J.6 — Auxiliary Control Designator Type 2 Object Pointer attributes and record format ...................... 271
Table J.7 — Auxiliary Control Designator Type 2 Object Pointer examples ................................................... 271
Table J.8 — Set Information ............................................................................................................................ 291
Table L.1 — ISO 8859-1 (Latin 1) character set.............................................................................................. 294
Table L.2 — ISO 8859-15 (Latin 9) character set............................................................................................ 295
Table L.3 — ISO 8859-2 (Latin 2) character set.............................................................................................. 296
Table L.4 — ISO 8859-4 (Latin 4) character set.............................................................................................. 297
Table L.5 — ISO 8859-5 (Cyrillic) character set .............................................................................................. 298
Table L.6 — ISO 8859-7 (Greek) character set............................................................................................... 299
Table L.7 — WideString minimum character set ............................................................................................. 300

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 ISO 11783-6:2014(E)

Table of Figures
Figure 1 — Virtual terminal — examples..............................................................................................................6
Figure 2 — Operator input and control means – example ...................................................................................8
Figure 3 — Physical Soft Key Orientation Examples showing Key Locations ...................................................11
Figure 4 — VT virtual Soft Key paging ...............................................................................................................12
Figure 5 — Example VT which displays an active and an inactive Working Set simultaneously ......................21
Figure 6 — Initialization, unexpected shutdown, and expected shutdown ........................................................24
Figure 7 — Container reuse ...............................................................................................................................26
Figure 8 — Container used to hide objects — Example ....................................................................................26
Figure 9 — External Object References — VT Example ...................................................................................29
Figure 10 — External Object References — Relationship Example ..................................................................30
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Figure 11 — Relative and absolute location of objects ......................................................................................31

Figure 12 — Object changed or hidden — Display update................................................................................32
Figure 13 — Clipping examples .........................................................................................................................34
Figure 14 — Graphical Extents of a Character ..................................................................................................39
Figure 15 — 8 × 10 fonts — Example ................................................................................................................44
Figure 16 — CR and LF application to test strings ............................................................................................46
Figure 17 — Rectangle line suppression and filling examples...........................................................................48
Figure 18 — Ellipse filling examples (Without and with border line art) .............................................................49
Figure 19 — Polygon filling examples (Without and with border line art)...........................................................49
Figure 20 — Displaying data from multiple Working Sets - Example.................................................................52
Figure 21 — User-Layout Data Mask .................................................................................................................53
Figure 22 — Window Mask objects - Example...................................................................................................54
Figure 23 — Window Mask Border - Example ...................................................................................................55
Figure 24 — Key Cell layout - Examples............................................................................................................56
Figure 25 — User-Layout Data Mask with 6 Key Cells - Example.....................................................................57
Figure 26 — Key object in a Key Group indicating Working Set - Example ......................................................58
Figure 27 — Key Group Objects outside of User-Layout Data Mask - Example ...............................................59
Figure A.1 — Bit positions in a bitmask..............................................................................................................66
Figure B.1 — Button examples with border (Options – Bit 5 = FALSE).............................................................92
Figure B.2 — Button examples no border (Options – Bit 5 = TRUE) .................................................................92
Figure B.3 — Input Boolean examples...............................................................................................................97
Figure B.4 — Output Line object showing start and end points using different brush sizes ............................115
Figure B.5 — Output Rectangle object showing end points using different brush sizes..................................118
Figure B.6 — Output Ellipse object ..................................................................................................................120
Figure B.7 — Output Ellipse object – correct and incorrect rendering .............................................................121
Figure B.8 — Output Polygon types .................................................................................................................123
Figure B.9 — Output Meter object....................................................................................................................126
Figure B.10 — Output Meter object — examples.............................................................................................129
Figure B.11 — Output Linear Bar Graph — examples.....................................................................................130
Figure B.12 — Output Arched Bar Graph object — example ..........................................................................134
Figure B.13 — Effect of Line Attribute - example of same line art with different width ....................................145
Figure B.14 — Effect of Line Attribute — example pattern: 1010….................................................................145
Figure B.15 — Colour Map object reverses colours – example.......................................................................153
Figure B.16 — Example drawing with Graphics Context object.......................................................................155
Figure B.17 — Example application of the Graphics Context object and viewport..........................................156
Figure C.1 — Object pool variable length record format..................................................................................193
Figure F.1 — Acoustic signal termination.........................................................................................................216
Figure F.2 — Acoustic signal with multisound..................................................................................................216
Figure J.1 — Quadrature non-latching boolean value representation .............................................................269
Figure J.2 — Examples of Auxiliary Function references on Auxiliary Input unit Data Mask ..........................272
Figure J.3 — Example showing expansion of a single assignment designator ...............................................272
Figure J.4 — Example showing expansion of a multiple assignment designator ............................................273

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 ISO 11783-6:2014(E)

Figure J.5 — Example showing expansion of Auxiliary Inputs on an Auxiliary Function Data Mask .............. 273
Figure J.6 — Typical message sequence to make assignment and later remove assignment ...................... 278
Figure J.7 — Auxiliary control message flow................................................................................................... 281
Figure J.8 — Auxiliary assignment screen – example..................................................................................... 282
Figure J.9 — Permitted remove assignment alternatives................................................................................ 283
Figure J.10 — Preferred assignment example ................................................................................................ 286

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 ISO 11783-6:2014(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 19, Agricultural electronics.

This third edition cancels and replaces the second edition (ISO 11783-6:2010) which has been technically
revised.

ISO 11783 consists of the following parts, under the general title Tractors and machinery for agriculture and
forestry — Serial control and communications data network:

⎯ Part 1: General standard for mobile data communication

⎯ Part 2: Physical layer

⎯ Part 3: Data link layer

⎯ Part 4: Network layer

⎯ Part 5: Network management

⎯ Part 6: Virtual terminal

⎯ Part 7: Implement messages application layer

⎯ Part 8: Power train messages

⎯ Part 9: Tractor ECU

⎯ Part 10: Task controller and management information system data interchange

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 ISO 11783-6:2014(E)

⎯ Part 11: Mobile data element dictionary

⎯ Part 12: Diagnostics services

⎯ Part 13: File server

⎯ Part 14: Sequence control

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 ISO 11783-6:2014(E)

Introduction
Parts 1 to 14 of ISO 11783 specify a communications system for agricultural equipment based on the
ISO 11898 [5] protocol. SAE J 1939 [1] documents, on which parts of ISO 11783 are based, were developed
jointly for use in truck and bus applications and for construction and agriculture applications. Joint documents
were completed to allow electronic units that meet the truck and bus SAE J 1939 specifications to be used by
agricultural and forestry equipment with minimal changes. The specifications for virtual terminals given in this
part of ISO 11783 are based on DIN 9684-4 [2]. General information on ISO 11783 is to be found in
ISO 11783-1.

The purpose of ISO 11783 is to provide an open, interconnected system for on-board electronic systems. It is
intended to enable electronic control units (ECUs) to communicate with each other, providing a standardized
system.

All phrases in this document that refer explicitly to a software term for an object or a command shall have the
first letter of each object or command word capitalized (e.g. Output Linear Bar Graph object, Change Numeric
Value command). This aides in the recognition of these terms as a specific item which has a specific definition
in this document.

The International Organization for Standardization (ISO) draws attention to the fact that it is claimed that
compliance with this part of ISO 11783 may involve the use of a patent concerning the controller area network
(CAN) protocol referred to throughout the document.

ISO takes no position concerning the evidence, validity and scope of this patent.

The holder of this patent has assured ISO that he is willing to negotiate licences under reasonable and non-
discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the
holder of this patent right is registered with ISO. Information may be obtained from:

Robert Bosch GmbH

Wernerstrasse 51
Postfach 30 02 20
D-70442 Stuttgart-Feuerbach
Germany

Attention is drawn to the possibility that some of the elements of this part of ISO 11783 may be the subject of
patent rights other than that those identified above. ISO shall not be held responsible for identifying any or all
such patent rights.

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 INTERNATIONAL STANDARD ISO 11783-6:2014(E)

Tractors and machinery for agriculture and forestry — Serial

control and communications data network — Part 6: Virtual
terminal

1 Scope
ISO 11783 as a whole specifies a serial data network for control and communications on forestry or
agricultural tractors, mounted, semi-mounted, towed or self propelled implements. Its purpose is to
standardize the method and format of transfer of data between sensor, actuators, control elements,
information storage and display units whether mounted or part of the tractor, or any implements.

This part of ISO 11783 describes a universal virtual terminal that can be used by both tractors and
implements.

Corrections in the second edition were made to Table L.2 — ISO 8859-15 (Latin 9) character set.

Requirements in the second edition were specified for two versions of the VT and Working Sets. Version 3
VTs and Working Sets meet all the requirements of the first edition, the specific requirements for version 3 of
Annex G and the requirements of Annex J and Table L.2 — ISO 8859-15 (Latin 9) character set of the second
edition. Version 4 VTs and Working Sets meet all the requirements of the second edition.

New requirements in this third edition are specified as version 5 VT.

2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.

ISO 11783-1, Tractors and machinery for agriculture and forestry — Serial control and communications data
network — Part 1: General standard for mobile data communication

ISO 11783-3, Tractors and machinery for agriculture and forestry — Serial control and communications data
network — Part 3: Data link layer

ISO 11783-5, Tractors and machinery for agriculture and forestry — Serial control and communications data
network — Part 5: Network management

ISO 11783-7, Tractors and machinery for agriculture and forestry — Serial control and communications data
network — Part 7: Implement messages application layer

ISO 15077, Tractors and self-propelled machinery for agriculture — Operator controls — Actuating forces,
displacement, location and method of operation

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11783-1 and the following apply.

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 ISO 11783-6:2014(E)

3.1
auxiliary input unit
autonomous control function (CF) providing Auxiliary Controls for common use that may also be physically
located within an electronic control unit (ECU), or on the virtual terminal (VT)

3.2
object pool
collection of objects that completely define the operator interface for an implement or a single Working Set

Note 1 to entry: The complete VT definition will be made up of one or more object pools — one for each Working Set.

3.3
Object ID
numeric value which identifies a specific object within an object pool

Note 1 to entry: Object ID values range from 0 to FFFF16 (6553510), with 65535 as the NULL Object ID.
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3.4
attribute ID
AID
numeric value which references a specific object's attribute

Note 1 to entry: AID values range from 0 to FF16 (25510), with 255 as the NULL_AID.

3.5
char
single character where the size is 1 byte

Note 1 to entry: Commonly used for ISO 8859 characters (e.g. 4116 in ISO 8859-1 represents ’A’) (See Annex L).

3.6
character
single text grapheme or symbol, as in an alphabet

Note 1 to entry: Size is variable based on the encoding scheme (See char and WideChar).

3.7
code plane
group of 65536 possible character codes

Note 1 to entry: Unicode/ISO10464 organizes the characters in 17 code planes numbered 0 to 16.

EXAMPLE

Code plane 0 covers characters 00000016 to 00FFFF16.

Code plane 1 covers characters 01000016 to 01FFFF16.
...
Code plane 16 covers characters 10000016 to 10FFFF16.

3.8
open input object
state of an input object where the object has focus and it is open for operator input

Note 1 to entry: Open input object is used interchangeably with data input.

3.9
selected input object
state of an input object where the object has focus but it is not open for operator input

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 ISO 11783-6:2014(E)

Note 1 to entry: Selected input object is used interchangeably with “has focus”.

3.10
surrogate pair
32 bit code for characters composed of a 16 bit high pair and a 16 bit low pair

Note 1 to entry: UTF-16 encoding of characters in code plane 1 to 16 (See Clause 4.6.19.7 String encoding)

Note 2 to entry: UTF-16 Character encoding scheme defined by ISO10646.

3.11
WideChar
single character with a size of 2 bytes encoded in little endian order

EXAMPLE Byte sequence 4116, 0016 represents ’A’. (See Annex L).

Note 1 to entry: Two WideChars can be combined to indicate character codes exceeding 16-bit (See Clause 4.6.19.7
String encoding).

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3.12
WideString
zero or more characters composed of the primitive type “WideChar” always preceded by the byte order mark
FEFF16

EXAMPLE Byte sequence FF16,FE16,4116,0016,4216,0016,4316,0016 represents “ABC”. This WideString has a Length of
8 bytes with the number of characters in the presentation equal to 3.

3.13
8-bit string
zero or more characters composed of the primitive type “char”

Note 1 to entry: String length is variable.

3.14
VT Number
number that is used to uniquely identify each connected VT to the operator

Note 1 to entry: See Clause F.62.

3.15
User-Layout Data Mask
special Data Masks (see Clause 4.1) that are controlled by the VT but layed out by the operator

Note 1 to entry: See Clause 4.7.

3.16
Window Cell
equally sized cell in a grid on a User-Layout Data Mask

Note 1 to entry: See Clause 4.7.

3.17
Window Mask object
supplied by the Working Set for placement by the operator into the area of one or more window cells but not a
partial cell

Note 1 to entry: See Clause 4.7.

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 ISO 11783-6:2014(E)

3.18
User-Layout Soft Key Mask
Soft Key Masks that are controlled by the VT but layed out by the operator

Note 1 to entry: See Clause 4.7.

3.19
Key Cell
cell that is the size of a Soft Key designator in a User-Layout Key Mask

Note 1 to entry: See Clause 4.7.

3.20
Key Group object
area of one or more Key Cells and contains a grouping of one or more Key objects

Note 1 to entry: See Clause 4.7.

3.21
Non-VT Screen
display screen that is not part of the VT application or one in which the layout is controlled by the VT

EXAMPLE A screen that comes from another application within the display. (See Clause 4.7)

3.22
Non-VT Area
visible area outside the normal Data Mask and Soft Key Mask areas

EXAMPLE A display of information related to the vehicle operation. (See Clause 4.7)

3.23
Referenced WS
working set with an object pool containing objects which are shown by another object pool via the External
Object Pointer object

Note 1 to entry: See Clause 4.6.11.6.

3.24
Referencing WS
A working set with an object pool which shows object(s) from another object pool via the External Object
Pointer object

Note 1 to entry: See Clause 4.6.11.6.

3.25
Functionally Identical WS
Working Set(s) with a NAME that exactly matches other Working Sets, when the Self Configurable, Instance
fields, and Identity Number are excluded in the comparison

3.26
Line End
“cursor” or text positioning control intended to locate the following displayable character "font height" pixels
downward and at the left-most position in the containing object

Note 1 to entry: See Clause 4.6.19.6.

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 ISO 11783-6:2014(E)

4 Technical requirements

4.1 Overview

A virtual terminal (VT) is a control function (CF) within an electronic control unit (ECU), consisting of a
graphical display and input functions, connected to an ISO 11783 network that provides the capability for a
CF, composing an implement or a group of implements to interact with an operator. The VT provides the
capability to display information and to retrieve data from an operator. The CF, as an implement or a group of
implements represented by a Working Set Master acquires storage for objects within the VT and on demand
displays this stored information to an operator. In this part of ISO 11783, the term Working Set will be used for
a CF, as an implement or a group of implements either represented by a single ECU or a group of ECUs
acting as a Working Set. Working Sets on the network can also acquire the use of input methods of the VT to
allow the operator to send signals back to the Working Set.

This part of ISO 11783 describes the VT with the detail and clarity required for VTs built by different
manufacturers to be interchangeable with any implement Working Set that uses its services. The interface
protocol of this part of ISO 11783 also reduces the run-time ISO 11783 communication bus traffic as much as
possible. For these reasons, the requirements of this part of ISO 11783 are organized in an object-oriented
manner with specific attributes and behaviour of each object clearly and fully defined. The required behaviour
of the VT given certain situations is also detailed.

In general, the functions, not the design, of the user interface of the VT are defined in order to avoid
restrictions on possible designs. However, certain limitations are imposed in order to meet the goal of
interchangeability between various manufacturers. Specifications regarding physical layout, components,
processing power and the number of physical elements comprising a VT have been omitted in order to avoid
restricting manufacturer’s designs.

The VT shall have a pixel-addressable (graphical) display. Information from connected Working Sets is shown
to the operator on the graphical display. This information is shown in display areas that are defined by Data
Masks, Alarm Masks and Soft Key Masks. The data for these masks is contained in object definitions that are
loaded into a VT via the ISO 11783 CAN bus, or from non-volatile memory. When the information defined by a
mask is required on the display, the mask can be made visible by a single Change Active Mask command
from the Working Set, and therefore does not require significant additional network traffic.

The physical size, resolution, orientation and methods of implementing the graphical display are at the
discretion of the designer of the VT. Figure 1 — Virtual terminal — examples shows examples of some
possible VT designs and orientations.

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 ISO 11783-6:2014(E)

Key
1 Data Mask area 4 Soft Key Designator
2 Soft Key Mask area 5 Physical Soft Key
3 Physical Screen

Figure 1 — Virtual terminal — examples

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 ISO 11783-6:2014(E)

4.2 Operator input and control

The VT shall provide the operator with means for control and input. There are five means associated with a
VT that can be used for the input of data, selection of display data, and the control of connected Working Sets.

See Figure 2 — Operator input and control means

a) Soft

is a means, most likely keys on the VT, using software-changeable designators (labels). “Soft Keys” have
their identity changed depending on which Soft Key Mask is visible. The VT shall make the association
between a Soft Key and its designator clearly evident to the operator.

b) Navigation

is a means of selecting an input field or Button within the active Data Mask. If keys are used for
“Navigation”, they do not send key activation information to the Working Set and are proprietary to the VT.

c) Data Input

is a means of entering/editing information in an input field within the active Data Mask. If keys are used for
“Data Input”, they do not send key activation information to the Working Set and are proprietary to the VT.
A means shall be provided for entering any number or character sequence that is valid for the input field.

During the data input operation, the VT Status message will continue to indicate the active Working Set,
and active mask which contains the input object for which the data input operation applies. Data input
operation that originates on a User-Layout Data Mask does not affect the VT Status message.

There are two types of Data Input – “editing” and “real time editing”.

1) Editing
is a means of data input where the new value being entered is composed by the operator using a
proprietary means within the VT. During the composition of the new value, changes to the original
value are not communicated to the Working Set. A means shall also be provided for ESC from or
ENTER of information into a data field.
The ENTER means shall be provided to indicate to the Working Set the completion of data entry and
communication of the new value, and the ESC means shall be provided to indicate that the data
entry was aborted. The ENTER and ESC means may either be a permanent key or may only be
available during data entry. (See Table 5 — VT Reaction to navigation and data input events) The VT
shall send a VT ESC message to a Working Set for an operator-activated ESC means or an ESC
response as a response to receiving an ESC command from a Working Set.
2) Real Time Editing
is a means of data input for an Input Number object and Input List object where the object has focus
and it is open for operator input and changes by the operator to the value are periodically transmitted
to the Working Set while the object is being changed. The VT Change Numeric Value message is
limited to a 5 Hz update rate. Each value change sent to the Working Set is considered a complete
transaction, as if the ENTER means was activated, and cannot be reverted by the ESC means. The
VT is not required to provide steps in uniform increments, however it shall be possible to set any
value (e.g. fast scrolling is allowed to span a wide range of values, with fine adjustment for final
setting). If the ESC means is activated during real time editing, the VT shall ensure that the on-
screen value is equal to the value last sent to the Working Set. The VT may send a final value to the
Working Set prior to sending the VT ESC message, or ESC response message to ensure this
synchronization. Real time editing shall meet the operator controls requirement specified in ISO
15077.

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 ISO 11783-6:2014(E)

d) Control

is a means of selecting between Working Sets whenever a Data Mask is available and for
acknowledging alarms. Both means are required. Since more than one Working Set can use the
services of the VT, the VT shall provide a means for the operator of selecting between connected
Working Sets. The Working Set selection means should be indicated by three circular arrows or a
similar graphic. Only the ACK means sends key activation information to the Working Set.
e) Auxiliary Input

is a means available to the operator for communicating input commands to the Working Set(s) using
Auxiliary Controls which are assigned to Auxiliary Functions. (See Annex J)

Key
1 control 5 Soft Key 6
2 navigation 6 data input
3 Soft Key 1 7 auxiliary input
4 Soft Key 2

Figure 2 — Operator input and control means – example

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 ISO 11783-6:2014(E)

4.3 Acoustic alarm

The VT shall provide an acoustic alarm. The alarm may be a simple on/off type buzzer or an acoustic
component capable of either/or variable frequency and audio level. (See Clause D.9 Get Hardware response)

4.4 Coordinate system

Positions and sizes in this part of ISO 11783 are always given in physical pixels unless otherwise stated. A
two-dimensional coordinate plane (x, y) is used, where x is the number of units wide (x increases from left to
right) and y is the number of units high (y increases from top to bottom). The coordinates are signed values.
The origin (0, 0) for any object's coordinate system is located at the top left-hand corner of the parent object.

4.5 Display areas

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4.5.1 General

This section defines standard Data Mask and Soft Key Mask areas of the display. Alternate usage of this area
supports displaying data from multiple working sets. (See Clause 4.7)

4.5.2 Data Mask

The VT shall reserve an area of the display for displaying Data Masks and Alarm Masks. This area is called
the Data Mask area (See Figure 1 — Virtual terminal — examples). Recognizing that the physical orientation
of the VT display could be different, depending on the manufacturer of the VT, a square data mask aspect
ratio is chosen to ensure correct display in either landscape or portrait orientation. The minimum Data Mask
area shall be 200 pixels × 200 pixels. This requirement does not limit the physical resolution or size of the
display, only the useable Data Mask area. Higher resolution mask areas are permitted, but the square aspect
ratio shall be strictly enforced. Examples of Data Mask areas that would meet this requirement are:

⎯ 200 × 200,
⎯ 240 × 240,
⎯ 320 × 320, and
⎯ 480 × 480.
Any other square dimensions would be acceptable.

It is suggested that unused areas of the physical display be used for proprietary information such as vehicle
data, VT statistics or other data.

4.5.3 Soft Key Mask area and Soft Key designators

4.5.3.1 Soft Key variants and navigation

The VT shall reserve an area of the display for Soft Key labels, separate from the Data Mask area. This area
is called the Soft Key Mask area (See Figure 1 — Virtual terminal — examples). Each Soft Key shall have a
reserved display area, called a Soft Key designator, for displaying a label (See Figure 1 — Virtual terminal —
examples). The minimum size of the designator field is 60 pixels wide × 32 pixels high regardless of screen
orientation. The Soft Key designators may contain text, graphics or both. The Soft Key Mask area may be
adjacent to, or physically separate from, the Data Mask area, but shall not be part of the Data Mask area.

The VT shall provide a clearly visible separation between the individual Soft Key designators (for example by
drawing a one-pixel line). This visible separation shall be drawn outside of the Soft Key designator area. Only
if the minimum size of the designator field cannot be fulfilled due to this requirement, the drawing of a one-
pixel line on the border of the Soft Key designator area is acceptable.

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 ISO 11783-6:2014(E)

The presentation of the Soft Keys can be further described in three groups, with a defined relationship:
Navigation Soft Keys < Number of Physical Soft Keys <= Number of Virtual Soft Keys.

a) VT Version 3 and prior VTs have no requirement on the number of physical Soft Keys.

b) VT Version 4 and later VTs shall provide at least 6 physical Soft Keys.

c) VT Version 3 and prior shall support a maximum of 64 virtual Soft Keys per Soft Key Mask and
shall support as a minimum the number of reported physical Soft Keys (see Clause 4.5.3.3).

d) VT Version 4 and later shall support exactly 64 virtual Soft Keys per Soft Key Mask (see Clause
4.5.3.3).

e) The VT shall provide a means for the operator to navigate and select all defined Soft Keys. For
example, if there are six physical keys, some type of paging would be required to allow the
operator to navigate to, and select from, any of the 64 virtual Soft Keys using the six physical
keys.

4.5.3.2 Physical Soft Keys

Physical Soft Keys is the count of the number of permanently dedicated keys that the VT makes available to
active Working Sets. The term “physical Soft Key” does not imply that the VT must provide physical buttons
for the Soft Keys. For example on a VT with touch screen, the physical Soft Keys may be located directly on
the touch screen as shown in Figure 1 — Virtual terminal — examples.

For VTs with a vertical arrangement of physical Soft Keys, key number 1 shall be on the right and the top-
most position. Key number 2 shall be adjacent and below Key 1. Key m shall be at the bottom of the first
column. If there are additional physical Soft Keys, the column containing keys m+1 to key n shall be to the left
of the first column. Each additional column of physical Soft Keys shall continue to the left.

For VTs with a horizontal arrangement of physical Soft Keys, Key number 1 shall be on the top row and in the
left-most position. Key number 2 shall be adjacent and to the right of Key 1. Key m shall be at the far right of
the top row. If there are additional physical Soft Keys, the row containing keys m+1 to key n shall be below the
first row. Each additional row of physical Soft Keys shall continue below the previous row. Examples of these
arrangements are shown in Figure 3 — Physical Soft Key Orientation Examples showing Key Locations.

For VTs without a clear horizontal or vertical arrangement of physical Soft Keys (e.g. physical Soft Keys
located in a matrix on the touch screen) the rules for a VT with a vertical arrangement of physical Soft Keys
apply.

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 ISO 11783-6:2014(E)

Figure 3 — Physical Soft Key Orientation Examples showing Key Locations

4.5.3.3 Virtual Soft Keys

Virtual Soft Keys is the count of the number of Soft Keys that the VT supports for each active Working Set’s
Data Mask. If the physical Soft Keys count is less than the virtual Soft Keys count, the VT shall provide a
means for navigation to allow the operator to choose from any of the Working Sets Soft Keys.

4.5.3.4 Navigation Soft Keys

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Navigation Soft Keys is the count of the number of physical Soft Keys that the VT may allocate for the purpose
of navigation among the Soft Keys. The number of navigation Soft Keys shall be less than the number of
physical Soft Keys. If the VT provides other means of navigation that does not use the physical Soft Keys, this
value shall be zero.

4.5.3.5 Navigation among Soft Keys

If the Working Set provides a number of Soft Keys on a Soft Key Mask equal to or less than the number of
physical Soft Keys reported by the VT, then all of the Soft Keys on this Soft Key Mask shall be accessible with
the physical Soft Keys. The VT shall not provide any navigation means for this Soft Key Mask.

If the Working Set provides more Soft Keys on a Soft Key Mask than the VT has reported in the number of
physical Soft Keys, the VT shall provide navigation for that Soft Key Mask. This navigation among the Soft
Keys shall be done by paging through the Soft Keys in groups, not by scrolling. Further, a “group” is defined
as the “physical Soft Keys” count minus the “navigation Soft Keys” count. The navigation Soft Keys shall
always occupy the same physical Soft Key positions on all pages, although the VT designer may choose to
disable (but not remove) the navigation keys on certain pages. The last set of virtual Soft Keys (depending on
how many Soft Keys the Working Set provided to the VT) may not completely fill the Soft Key Mask. The
remainder of the Soft Key designators shall not be used.

As described in section B.5 Soft Key Mask object and illustrated in Figure 4 — VT virtual Soft Key paging,
pointers to the NULL Object ID reserve a Soft Key position. Pointers to NULL Object ID that are at the end of
the list of Soft Keys shall not reserve a Soft Key position and shall not be considered for paging or navigation.

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 ISO 11783-6:2014(E)

EXAMPLE As shown in Figure 4 — VT virtual Soft Key paging (a in figure), a VT is designed with 6 physical Soft
Keys, 64 virtual Soft Keys, and 1 (a in figure) navigation Soft Key. The Working Set provides 18 Soft Keys to the VT,
however there are 3 which are Pointers to the NULL Object ID. To support navigating among the Soft Keys the VT
designer alters Soft Key 6 into a “next Soft Key group” button. A navigation group is calculated as sets of 5 Soft Keys (a in
figure), starting with the first Soft Key. When the navigation key is pressed, the VT shows the next group of Soft Keys.
Another example (b in figure) shows a similar example with 2 navigation Soft Keys. Another example (c in figure) shows
an arrangement with two columns of keys and two navigation keys. If the VT provides dedicated navigation keys, the
number of navigation Soft Keys reported shall be zero (d in figure).

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Figure 4 — VT virtual Soft Key paging

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 ISO 11783-6:2014(E)

4.6 Behaviour
4.6.1 Object pools

4.6.1.1 General

The operator interface definition for a device of one or more implements represented by either a single ECU or
a Working Set consists of a set of objects (hereafter referred to as the Working Set’s object pool ). These
objects are defined in detail in Annex B and Annex J. Each object contains all necessary attributes and child
object references for processing the object to completion. The Working Set assigns a unique Object ID to
each object in its object pool so that each object is uniquely addressable. Object IDs shall be unique within a
single Working Set’s object pool but may not be between different Working Sets.

The object pool is transferred to the VT at initialization by using the procedure described in Annex C. The VT
is intended to be capable of storing the object pools in a modifiable memory area. VTs may store multiple
pools of a Working Set, in non-volatile memory, if they have unique version labels. For example, multiple
pools that differ only by language. All objects shall be fully described before they are made active in a mask
on the display.

The behaviour of the VT when no object pools are loaded is proprietary.

4.6.1.2 “NULL” Object ID

Object ID FFFF16 (6553510) is reserved for use as the “NULL” Object ID.

4.6.1.3 Processing objects

Objects listed in parent objects may also list child objects, thereby creating a tree hierarchy in the object pool.
Objects are always processed in the order listed in the parent object in a “depth-first” manner. In other words,
if a reference is made to an object that references other objects, the child references are processed to
completion before returning to the parent to continue processing.

VT version 5 and later VTs shall support a minimum hierarchy depth of 30 objects. For VT version 4 and prior
VTs, the requirement is unspecified.

The hierarchy depth is computed starting with the following objects; Data Mask object, Alarm Mask object, Window
Mask object, Soft Key Mask object, Key Group Objects, and increments by one to reach a child object. For the
child objects that have child objects the depth increments again. This process continues to the last child
object. For computing the hierarchy depth, the object to which a pointer object references is counted as a child
object.

The relationship from the Working Set object to either a Data Mask object or an Alarm Mask object, and the
relationship from those to a Soft Key Mask object are not included in the count.

4.6.2 Working Sets

The Object Pool supplied by a Working Set Master is associated with all members of that Working Set. This
allows object information from one CF or all the CFs that make up a Working Set to be collectively presented
as a common object pool. One CF shall be designated as the Working Set Master for each Working Set. As
coordinator of the communications of a Working Set, the Working Set Master shall secure the use of the VT
and provide the object pool definition. It shall also send Working Set messages that provide the NAMEs of the
members of said Working Set to the VT. This identifies the members of the Working Set and hence those CFs
which can communicate to the VT. Appropriate messages for defining a Working Set are given in ISO 11783-
7.
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Once members of the Working Set have been identified and after the object pool has been loaded into the VT,
any member of the Working Set has the ability to provide data for objects and to change attributes in the
object pool during run-time.

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 ISO 11783-6:2014(E)

The Working Set Master shall provide the initial object pool definition. Any data input by the operator into input
field objects is always transmitted to the Working Set Master.

The VT shall never have Working Set Members and shall not transmit the Working Set Master or Working Set
Member messages (See ISO 11783-7).

The handling of VT Response messages defined herein supersedes part ISO 11783-1 in reference to
responses being directed only to the Working Set Master. See Table 1 for — VT Response message behavior
to Working Set messaging.
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 ISO 11783-6:2014(E)

Table 1 — VT Response message behavior

Configuration Working Set VT Versionb Behaviour

Versiona
1 3 and prior 3 and prior VT response to any command is directed to the WS Master
2 3 and prior 4 and later VT response to any command is directed to the WS Master
3 4 and later 3 and prior VT response to any command is directed to the WS Master
4 4 and later 4 and later VT response to any command is directed to the originator
a
Working Set Version is reported in the Working Set Maintenance message.
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b
VT Version is reported in the Get Memory response message.

In configurations types 1 through 3, the Working Set Member has the responsibility to monitor all [destination
specific] VT to Working Set Master messages in order to pair its commands with responses. The Working Set
Master will receive unsolicited responses from the VT (which were originated by its members), and will not be
able to pair these with messages the master originated. The Working Set Members also will not be able to pair
the messages correctly when originating from another member or from the master.

In configuration type 4, all responses from the VT are directed to the originating nodes. Responses that are
communicated via Transport Protocol are now possible (e.g. Get Supported WideChars response). Further,
the Working Set Master no longer receives unsolicited response messages. Working Set Members no longer
have an obligation to monitor destination specific messages directed to another address.

In order to maintain backward compatibility, Working Sets shall not send higher version messages to a lower
version VT (e.g. a version 4 command sent to a version 2 VT). How a lower version VT would respond in such
a case should be considered unpredictable. For example some VT designs might respond with a NACK
message, others might ignore the message. In extreme cases this could cause a software crash or reset at
the VT.

Conversely, the VT shall not send higher version messages to a lower version Working Set (e.g. a version 4
event sent to a version 2 Working Set). How a lower version Working Set would respond in such a case
should be considered unpredictable. For example some Working Set designs might respond with a NACK
message, others might ignore the message. In extreme cases this could cause a software crash or reset at
the Working Set.

VT version 5 and higher VT’s and Working Sets shall support the VT Unsupported VT Function message, and
Unsupported VT Function message, respectively. With this message the VT and Working Set respond in a
predictable way. VTs and Working Sets, designed for VT version 4 and prior, may implement these
messages.

Additional compatibility information is defined in clause 4.6.24.

4.6.3 Multiple Visually Similar Working Sets

When more than one visually similar Working Set from the same manufacturer becomes part of a network,
these Working Sets should be uniquely identified to correlate each instance with a location. This shall be
accomplished using an Instance field of the NAME (e.g. 2 sprayers from the same manufacturer, or 2 or more
visually similar Auxiliary Input units).

For consistent system configuration, the Working Sets should be arranged with the lowest to highest instance
from left to right followed by front to rear followed by bottom to top.

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 ISO 11783-6:2014(E)

The manufacturer shall provide the operator a means to establish a working configuration, using one or more
of the following methods or via some other means not specified here.

The operator can correctly locate the Working Set based on its instance with:

⎯ An indication on the label of the Working Set unit identifying its Instance,
⎯ By physical location, via a wire in the harness of the Working Set that automatically sets its instance in
increasing values left to right followed by front to rear followed by bottom to top.
The operator can set the Instance based on its location with:

⎯ An operator accessible “Instance” switch on the Working Set unit,

⎯ An operator accessible “Instance” setting, such as on a Data Mask,
⎯ Use of the commanded name message (See ISO11783-5) with a provided service tool.

4.6.4 Displayed Working Set number

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When more than one visually similar Working Set exists on a network, the Working Set shall indicate its
working set number on its Working Set object. Additionally, the Working Set should indicate its working set
number on visible masks.

The displayed Working Set number shall be defined by the manufacturer. The Working Set number should be
related to the Function Instance, the Device Class Instance, and/or the ECU Instance, as defined by the
manufacturer (See ISO11783-5). Other factors defined by the manufacturer may also be used to ensure the
Working Set is uniquely identifiable. All visually similar equipment from the same manufacturer shall apply the
same relationship.

Example 1 working set number = working set Function Instance + 1

Example 2 working set number = working set Device Class Instance + 1

Example 3 working set number = working set ECU Instance + 1

4.6.5 Language, formats and measurement units selection

The VT(s):

⎯ Shall send the standard language, format and measurement units messages defined in ISO 11783-7,
hereafter “standard setups”. The Working Set object identifies the languages that the Working Set
supports. The VT shall provide a method for the operator to view the list of supported languages and to
select an item from the list. If no language has been entered by the operator (as would be the case in a
factory-new VT), the VT shall attempt to query the default language from the tractor ECU. Once the
operator has set the language, The VT’s language message always takes priority over the tractor ECU’s
language.

⎯ Shall also provide a method for the operator to select formats (Time, Date, etc.) and measurement units.
The VT shall report selected language, formats and measurement units at power up and any time there is
a change. These messages allow the Working Set to modify its object pool to the operator-selected
language (.e.g. by updating string fields, selecting units of measure, changing offsets and scales, etc.).

⎯ Shall store the standard setups in non-volatile storage and restore the values during initialization.

⎯ Shall respond to ISO11783-7 “Language Command” requests sent to the global address

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 ISO 11783-6:2014(E)

⎯ Shall respond to ISO11783-7 “Language Command” requests directed to this VT

The Working Set(s):

⎯ Shall configure their standard setups according to the VT to which they are publishing the pool(s). This
can cause different standard setups to be published to different VTs. (e.g. auxiliary objects are published
to VT with Function instance 0 and the remainder of the pool to other VTs)

Shall use a proprietary method to select an appropriate (or default) setting if the Working Set does not
support the selected language, formats or units.
4.6.6 Initialization

Upon power-up or reinitialization, a specific sequence of events shall occur in order to ensure proper
initialization of the VT and Working Sets, as follows.

4.6.6.1 VT initialization

1) The VT shall complete the address claim procedure in accordance with ISO 11783-5 and shall also
send an address claim request to the global destination address (255).

2) The VT shall begin transmission of the VT Status message. In the case of a reset or recovery, the
VT shall ensure that greater than 3 seconds have elapsed between this initial VT Status message
and the previous VT Status message.

3) If language selection has not been entered by an operator, the VT shall attempt to request the default
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language setting from the tractor ECU.

4) The VT shall allow Working Sets to initialize and to load their object pools.

4.6.6.2 Working Set initialization with VT

1) The Working Set, if equipped with Auxiliary Functions, shall clear any assignments in volatile memory.

2) The Working Set Master (and Working Set Members) shall complete the address claim procedure in
accordance with ISO 11783-5.

3) The Working Set Master shall wait until the VT begins transmission of the VT Status message.

4) The Working Set Master shall identify itself and its members to the VT using messages given in
ISO11783-7.

NOTE 1 The Working Set Master may send these messages for other purposes (e.g. Task controller
initialization).

NOTE 2 If the Working Set Master has a need to reconfigure the list of Working Set Members after the
initialization is complete, the Working Set Master shall send the Working Set Master and Working Set Members
messages. The Working Set Master may use this to add or remove members from the set. No Working Set
initialization is required.

5) The Working Set Master shall transmit the Working Set Maintenance message once with the ‘initiating
flag’ set to 1 (when designed for version 3 and later VTs).

If the VT had previously detected a shutdown and was transmitting the NACK in response to the
Working Set Maintenance message (See Clause 4.6.9 Connection management), there are two cases
where the VT shall stop transmitting the NACK:

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 ISO 11783-6:2014(E)

I) In the case of a version 3 or later ECU, identified by Working Set Maintenance message;
Byte 3 < 255 and the initiating flag Byte 2 Bit 0 = 1.
II) In the case of a version 2 and prior ECUs, identified by Working Set Maintenance message;
Byte 2 = FF16, and the VT received a Working Set Master message since the prior
maintenance message.

6) The Working Set Master shall begin transmitting the Working Set Maintenance message with the
‘initiating flag’ set to 0 (when designed for version 3 and later VTs).

7) The Working Set Master may request the language and format messages from the VT (See ISO
11783-7) if it has not already received this message from the VT and the Working Set has
presentation that is language or unit specific.

8) The Working Set Master may query the VT as necessary to determine its capabilities. Based on the
VT’s responses, the Working Set Master shall adjust its object pool for scaling, available fonts,
supported colours, etc.

9) The Working Set Master may query the VT to determine if its object pool already exists in non-volatile
memory.

10) Object pool transfer shall commence and be completed. This can be done either by asking for the
object pool to be transferred from non-volatile memory (See Annex E) or by using the protocols
detailed in Annex C.

4.6.6.3 Working Set initialization on networks with multiple VTs

A Working Set Master shall have a means to perform a “Move to another VT” function on networks with
multiple VTs. This function shall allow movement of the Working Set to each of the available VTs in
sequence. For example, this function could be accomplished with a “Next VT” Soft Key or Button in the
user interface and/or in combination with the Identify VT message. The function behaves as follows:

1) “Move to another VT” is enabled if the Working Set Master detects more than one VT on the network.

2) When "Move to another VT" is activated, the Working Set Master:

I) Puts itself in a safe state, or prevents activation of this feature unless it is in a safe state.

II) Shall send the Delete Object Pool command to the VT and wait for the response.

III) Shall stop sending the Working Set Maintenance message to the VT.

IV) Starts the initialization process with another VT on the network.

V) The Working Set Master shall save the new VT as the preferred VT for a next power cycle. If
the preferred VT is not available within a certain time period after startup, the Working Set
Master may initialize connection to any other VT on the network. The Working Set may
provide a means for the operator to set the maximum wait time period or it may be obtained
from the boot time specification in the "Get Hardware response" message of the preferred VT.

4.6.7 System Shutdown

4.6.7.1 General

In this context “System Shutdown“ is defined as the period of time when the Key Switch state indicates the
key is off and yet ECU Power remains on. Actuator Power may or may not remain on concurrent with ECU
Power (see ISO 11783-7).

18 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

When the Key Switch state indicates the key has been turned off, and while ECU Power has not been
terminated, it is expected that systems may transition to a shutdown state that is appropriate for that system.
In some devices, this may cause immediate termination of all network communications, where other devices
may request power to remain on for a more orderly shutdown. Others still may ignore the Key Switch state
and continue normal operation until power is interrupted.

The relevant PGNs defined in ISO 11783-7 for determining the Key Switch state is the Wheel-based speed
and distance (PGN 65096) and for requesting power maintenance is the Maintain power (PGN 65095).

The following are recommended practices.

4.6.7.2 VT behavior

The VT can expect that applications on the network may terminate communications without warning.

A recommended behavior of the VT is to monitor the Key Switch state and take the following actions as a
result of the transition from "Key switch not Off“ to "Key switch Off“.

1) The VT should disable unexpected shutdown detection logic to avoid unnecessary notification to the
operator as a result of one application shutting down immediately while another maintains the ECU
Power beyond the normal 3 second timeout (see Clause 4.6.9).

2) The VT should maintain services while "Key Switch Off“ and for a minimum of 2 seconds following
the last "Maintain ECU Power“ request from those ECUs which have object pools in the VT volatile
memory.

3) The VT should continue to monitor the Key Switch state and reinitialize if turned from "Key switch
Off“ to "Key switch not Off“, ensuring that if the VT Status message was discontinued, the standard
Initialization process is performed (see Clause 4.6.6).

NOTE VT version 3 and prior did not specify shutdown behavior, therefore, these VTs may
discontinue all communications with the network, including discontinuing the VT Status message.

4.6.7.3 Working Set behavior

Working Set behavior may vary significantly depending on the design of the specific set.

One variation of a Working Set design may not monitor the Key Switch state and may continue as normal until
power is lost.

A recommended behavior of a Working Set is to monitor the Key Switch state and take the following actions
as a result of the transition from "Key switch not Off“ to "Key switch Off“:

1) The Working Set may send a “Maintain Power“ message (see ISO11783-7) to inform the system of
the state of the Working Set, and optionally as the means to request power be maintained.

2) The Working Set may monitor the “Maximum time of tractor power“ parameter (see Wheel-based
speed and distance message in ISO11783-7) and use this information during any power
management processes it may execute.

3) The Working Set may send a Delete Object Pool command to the VT to eliminate the possibility of an
unexpected shutdown indication (see Clause 4.6.9).

4) The Working Set should not consider the lack of the VT Status message or other VT to ECU
messages as an unexpected shutdown of the VT, and therefore should not attempt a connection to
any other VT as may be available.

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 ISO 11783-6:2014(E)

5) The Working Set should continue to monitor the Key Switch state and reinitialize if turned from "Key
switch Off“ to "Key switch not Off“. (See Clause 4.6.6).

4.6.8 Working Set object and active masks

In the initial object pool definition, each Working Set Master shall provide one, and only one, Working Set
object in order to define a descriptor, active mask and supported languages for the Working Set. The
descriptor may be graphical; text or both but shall fit inside the area defined by the VT for a Soft Key
designator. Any object or part of an object located outside of the Working Set descriptor shall be clipped. The
descriptor may be used by the VT any time the Working Set needs to be represented to the operator.

EXAMPLE Communication alarms, Auxiliary Control setup.

When a Working Set is “active”, it has exclusive input focus and is displayed on the VT display. When the
Working Set is "inactive", it may also be visible on the VT display but does not have input focus. The VT shall
provide some means to allow the operator to select the Working Set that is to be active. Only one Working Set
is active at any given time. The Working Set cannot force any of its masks to be visible when the Working Set
is not visible, and it cannot force its Working Set to be active when another Working Set is active. However, in
some cases, setting the active mask to an Alarm mask may make the Working Set visible, but that is not
guaranteed.

For VT version 4 and later, a VT may also display one or more Working Sets which are not active in addition
to the Active Working set. (See Figure 5 — Example VT which displays an active and an inactive Working Set
simultaneously). The VT uses the VT On User-Layout Hide/Show message to inform the inactive Working Set
to update its Data Mask and or Soft Key Mask when it is visible. If a Working Set responds with a NACK or
with a hidden state for the corresponding Data Mask or Soft Key Mask then the VT knows that the Working
Set does not support this feature. If the Working Set does not support this feature, the VT shall inform the
operator that the displayed information may not be updated. The VT may still display the inactive Working Set,
because the inactive Working Set may update its data. (See Clause 4.6.10 Updating the operator interface)
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 ISO 11783-6:2014(E)

Key
1 Data Mask area of active Working Set 6 Data Mask area of inactive Working Set
2 Soft Key Mask area of active Working Set 7 Soft Key Mask area of inactive Working Set
3 Physical Screen 8 Soft Key Designator of inactive Working Set
4 Soft Key Designator of active Working Set 9 Physical Soft Key of inactive Working Set
5 Physical Soft Key of active Working Set

Figure 5 — Example VT which displays an active and an inactive Working Set simultaneously

Table 2 — Working Set state changes (VT Supports only Active Mask)

Working Set
VT Behavior
state change

1. Hide the Working Set’s currently active Data/Alarm Mask and associated Soft Key
Mask.
Active to Inactive
2. Send the VT Status message to the global address (255) to inform Working Sets
1
of the change.

1. Display the Working Set’s currently active Data/Alarm Mask and display the
associated Soft Key Mask.
Inactive to Active
2. Send the VT Status message to the global address (255) to inform Working Sets
1
of the change
1
When the state of a Working Set changes from inactive to active and this causes the state of another Working
Set to go from active to inactive, there shall be only one VT Status message (not two), which shall specify the
new active Working Set.

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 ISO 11783-6:2014(E)

Table 3 — Working Set state changes (VT Supports Multiple Working Sets or Window Masks Visible
Simultaneously)

Working Set
VT behavior
state change

1. Remove visual indication that the Working Set is the active Working Set.
2. Send the VT Status message to the global address (255) to inform Working Sets
Active to Inactive and 1
of the change.
Visible
3. Send the VT On User-Layout Hide/Show message (state: Shown) to the Working
Set.

1. Send the VT On User-Layout Hide/Show message (state: Hidden) to the Working

Set (state Hidden is a special case here - refer to clause H.20).
2. Display the Working Set’s currently active Data/Alarm Mask and display the
Inactive and Visible to associated Soft Key Mask.
Active
3. Visually indicate to the operator that the Working Set is the active Working Set.
4. Send the VT Status message to the global address (255) to inform Working Sets
1
of the change.

1. Display the Working Set’s currently active Data/Alarm Mask and display the
associated Soft Key Mask.
Hidden to Active 2. Visually indicate to the operator that the Working Set is the active Working Set.
3. Send the VT Status message to the global address (255) to inform Working Sets
1
of the change.

1. Hide the Working Set’s currently active Data/Alarm Mask and associated Soft Key
Mask.
Active to Hidden
2. Send the VT Status message to the global address (255) to inform Working Sets
1
of the change.

Inactive and Visible to 1. Send the VT On User-Layout Hide/Show message (state: Hidden) to the Working
Hidden Set.
Hidden to Inactive 1. Send the VT On User-Layout Hide/Show message (state: Shown) to the Working
and Visible Set.
1
When the state of a Working Set changes from inactive to active and this causes the state of another Working
Set to go from active to inactive, there shall be only one VT Status message (not two), which shall specify the
new active Working Set.

The Working Set can select different Data Masks or activate Alarm Masks by changing the active mask
attribute of the Working Set object with the Change Active Mask command. The Working Set can change the
active mask even if the Working Set is inactive. This allows the appropriate mask to be displayed when the
Working Set becomes visible. When a Working Set is inactive, its active mask may not be visible, but still
remains as the active mask for that Working Set.

4.6.9 Connection management

The VT transmits the VT Status message once per second. The Working Set uses the message to ensure the
VT is present and to determine the current status of the VT. If a Working Set does not receive this message
for a period of 3 s it is determined to be a shutdown of the VT. When this happens the Working Set shall enter
a safe state. The safe state is defined as the state in which all functions dependant on the VT operator
interface are put into a known state that will not put the operator or machine at risk. The Working Set may re-
establish connection to the VT by restarting the initialization procedure.

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 ISO 11783-6:2014(E)

Each Working Set Master sends the Working Set Maintenance message once per second. The VT uses this
message to ensure that each Working Set is still present. If the VT does not receive this message for a period
of 3 s it is determined to be an unexpected shutdown of the Working Set Master (See Figure 6 — Initialization,
unexpected shutdown, and expected shutdown) and the following rules apply.

The VT shall not alert the operator -

⎯ If the Working Set has commanded the VT to delete the object pool, and the Working Set then stops
sending Working Set Maintenance messages. This allows the Working Set to silently remove itself from
the VT.

⎯ If the VT can detect the ignition key state and the ignition key is reported as off.

⎯ If there is no pool loaded by the Working Set into the VT volatile memory.

The VT shall alert the operator -

⎯ If the pool has not been commanded to be deleted and the ignition key is not detected as off and the
Working Set’s object pool is present in the VT. This is detected as an unexpected shutdown of the
Working Set and the VT shall alert the operator to this condition after which the VT shall delete the
Working Set’s object pool from volatile memory to free the memory for other uses. The means to alert the
operator is proprietary to the VT. If the Working Set is visible to the operator, the display is cleared and
the VT may give control to another connected Working Set and send the VT Status message to the global
address. If there is an active alarm for the failed Working Set the VT deselects the Alarm Mask
automatically.

When a Working Set’s object pool has been deleted and there exists auxiliary assignments mapped to this
Working Set, the VT shall remove them.

When the VT receives a Working Set Maintenance message from a Working Set which has unexpectedly
shutdown, it shall NACK the message (See ISO 11783-3). The NACK message is sent to the Working Set
Master. The Working Set may re-establish connection to the VT by restarting the initialization procedure (See
Clause 4.6.6 Initialization).

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 ISO 11783-6:2014(E)

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Key
Solid arrows indicate destination specific messaging, dashed arrows indicate global message.

Figure 6 — Initialization, unexpected shutdown, and expected shutdown

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 ISO 11783-6:2014(E)

4.6.10 Updating the operator interface

4.6.10.1 General

CAN has finite bandwidth available in support of all services (e.g. ISO 11783 part 3 through part 14). Further,
the VT has finite bandwidth that is shared by all Working Sets using its services. In order to best manage the
system bandwidth, it is recommended that:

⎯ Active Working Sets, or those that are inactive but visible, should issue commands to the VT only when
the data has changed in a way which is visible to the operator (e.g. only update objects actively
displayed).

⎯ Inactive Working Sets, which have no active Data Mask and Soft Key Mask displayed should reduce the
frequency of, or eliminate, updates to the VT.

4.6.10.2 Changing attributes and values

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Attributes of objects can be changed during operation by Working Set Masters and Working Set Members
using the defined change attribute messages. Certain attributes in each object are assigned an attribute ID.
The Change Attribute command allows any attribute with an AID to be changed if not designated as a read-
only attribute. In addition, attributes are sometimes grouped together into a single “change” command for
efficiency purposes. (e.g. Change Font Attributes command F.28)

Even when the associated Data Mask is not visible, the Working Set may continue to change the attributes
(including value) so that when the mask is made active and visible, the necessary output data is current and
ready to display.

4.6.10.3 Changing, adding and deleting objects

Working Sets can replace objects at run-time; however the replaced objects shall be of the same type. New
objects can be added by initiating a transport protocol session to send one or more objects to the VT. When
the VT receives an object with an existing Object ID, the existing object is replaced (the VT can determine the
owner from the source address of the message). Resizing objects is permitted but can cause the VT to run out
of memory. (See Annex C)

The entire object pool can be deleted from the volatile memory in the VT by the Working Set sending a Delete
Object Pool command.

4.6.11 Special objects

4.6.11.1 Container objects

A Container object is a special object used to

⎯ logically group objects in order to identify and reuse the container, or

⎯ hide and show objects.

Figure 7 — Container reuse shows an example of container reuse. Mask 1 and Mask 2 both need the
information displayed in Container 1. The Working Set first creates the container, and then inserts the
container into Mask 1 and Mask 2 using the Object ID of the container.

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 ISO 11783-6:2014(E)

Figure 7 — Container reuse

Figure 8 — Container used to hide objects — Example a) shows an example of using a container to hide a
group of objects. In the example, Text 1 and Text 2 should be visible at all times. Text 3 and Text 4 should be
visible only if a particular feature of an implement is available. Therefore, the Working Set creates a container
containing Text 3 and Text 4 to be inserted in the mask. At run-time, the Working Set determines whether or
not the particular feature is available. If not, the Working Set hides the container (See b in Figure 8 —
Container used to hide objects — Example).

Key
a) Particular feature available b) Feature not available: container hidden

Figure 8 — Container used to hide objects — Example

4.6.11.2 Attribute objects

There are five types of attribute objects: font, line, fill, input, and extended input. Attribute objects are
referenced by other objects. This allows one set of attributes to be shared with many objects to create and
maintain a common look across those objects. All objects using a given attribute object are updated when the
attribute object is changed.

4.6.11.3 Variable objects

Variable objects can be used to share data between two or more other objects. Changing the value in only
one object can reduce bus traffic. For example, it could be desirable to draw a Meter object and also to show
its current value as a numeric under the meter. In this case, a Number Variable object could be referenced by

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 ISO 11783-6:2014(E)

both the Meter object and the output field object. By doing this, a change in the value of the variable will be
reflected in both the meter and output field at the same time and the change will require only a single Change
Numeric Value command.

4.6.11.4 Macros

Macro objects are used to improve the performance of the operator interface.Macro objects have the following
properties:

a) Macros can only contain the commands listed in Annex F.

b) If a Macro triggers an event that causes another Macro, the current Macro is completed first before
another is started.

c) Macros are executed in the order they were triggered.

d) Macros triggered by the execution of a command shall be completed before the next bus command is
started.

e) Macro Object IDs shall be in the range 0 to 255 for VT version 4 and prior. Macro Object IDs may be in
the range of 0 to 65534 for VT version 5 and later.

f) Macros do not trigger response messages. When executing the command messages in a macro, the VT
shall not send response messages on the CAN bus for the messages contained in the macro. Therefore
macros reduce CAN traffic. For example, a Macro that executes a Change Active Mask command will
trigger a VT Status message, but will not trigger a Change Active Mask response.

CAUTION: Objects that are altered by both a Working Set and a Macro may be susceptible to a race
condition and should be evaluated for predictable behavior.

EXAMPLE 1 An

Input String object has a Macro to clear the

Input String object - On Input Field Deselection. The "Enter" means on an

Input String object of length greater than 3 characters causes the VT to send the data using Transport Protocol (TP) to the
Working Set (WS). The operator quickly navigates away from the

Input String object. "On Input Field Deselection" causes the VT to notify the WS with a VT Select Input Object message
(Deselect). An On Input Field Deselection Macro alters the

Input String object value. The WS receives the TP data asynchronous to the VT Select Input Object message (Deselect).
The outcome is based on the asynchronous processes in the VT, the message processing methods in the VT, including
TP processing and potential latencies, and the WS implementation.

EXAMPLE 2 An On Key Press Macro associated with a Button object changes the active Data Mask. An On Show
Macro attached to the new Data Mask changes the numeric value in an Input List object on this new Data Mask to initialize
it to a known setting. The operator presses the Button, which causes a Button Activation message to be sent to the WS.
The WS sends a Change Numeric Value command to the Input List object. The Input List object may end up with either
value, due to the asynchronous processes.

Circular references are not permitted since they create infinite Macro loops inside the VT and could render the
VT inoperable for all Working Sets.

EXAMPLE When a Macro triggers an event that references the same Macro, a circular reference is created.

© ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

4.6.11.5 Object pointer

The Object Pointer object allows run-time modification of included objects. By changing the value of the
Object Pointer object, a different object can be drawn at the same location. The type of object that the Object
Pointer is allowed to reference is limited and depends on the parent object. Refer to valid parent objects of the
Object Pointer for a list of objects that can be referenced. An Object Pointer can always point to another
Object Pointer. An Object Pointer can point to the NULL Object ID and in this case nothing shall be drawn.

When an Object Pointer is modified at run-time, resulting in an invalid object reference, the VT is not required
to detect this object pool error immediately but may delay error detection until the Data Mask object or Alarm
Mask object which contains the Object Pointer is activated. At activation of a data or Alarm Mask containing
the invalid object reference the VT sends the F.35 “Change Active Mask response” or H.14 “VT Change
Active Mask message” to inform the Working Set and may delete the object pool.

The VT may also detect the error immediately upon Object Pointer value modification, and in this case shall
send an F.23 Change Numeric Value response with “invalid value” indicated in the error codes. The VT may
also delete the object pool.

4.6.11.6 External Object Pointer

The External Object Pointer object allows a WS to display objects from an object pool of another WS.

To ensure that the external references are valid even after software updates of the participating WS, the
referenced WS and the referencing WS shall exchange information about the referenced objects before
enabling the external references. The information exchange shall be repeated every time either the
referencing WS or the referenced WS is restarted. As a minimum the object identifiers shall be transferred
from the referenced WS to the referencing WS.

Note: Some devices (e.g. the SCC/SCM – ISO11783-14) have a standardized method for exchanging object
information. If a standardized method does not exist, then a proprietary method shall be agreed between the
manufacturers of the referencing and the referenced WS.

To protect against unsolicited references the referenced WS shall use the External Object Definition object to
list the objects which are allowed to be referenced by another WS. The External Object Definition object is
assigned to one and only one referencing WS. If a referenced WS will allow multiple WS to reference objects
it shall have multiple External Object Definition objects.

The referencing WS shall use the External Reference NAME object to identify the WS it plans to reference.

The attribute values of the External Object Definition object, the External Object Pointer object and the
External Reference NAME object shall all be valid before the external object can be displayed. Some of the
information in the objects depends on the exchange of object information and therefore the objects shall be in
the reset state until the object information is complete.

Reset state is defined by:

⎯ External Object Pointer object : External Object Id attribute is the NULL object id

⎯ External Object Definition object : Enable bit in the Options attribute is cleared

⎯ External Reference NAME object : Enable bit in the Options attribute is cleared

When the object pool is loaded from non-volatile storage in the VT there is no guarantee that the attribute
values are valid, and therefore the VT shall set all occurrences of the External Object Pointer, the External
Object Definition and the External Reference NAME to the reset state.

28--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

When the object pool is uploaded from the WS master, the VT shall not set the objects to the reset state. If the
information exchange between the referenced and the referencing WS is not completed before the object pool
is uploaded, the WS master shall set the objects to the reset state before uploading the pool.

Before displaying an external object the VT shall check the validity of the external reference. The external
reference is considered to be valid when all of the following are fulfilled:

⎯ The External Reference NAME ID attribute of the External Object Pointer object identifies an enabled
External Reference NAME object.

⎯ The referenced WS has an object pool in volatile memory on the VT (referenced object pool).

⎯ The referenced object pool contains an enabled External Object Definition object where the NAME
attributes identifies the referencing WS.

⎯ External Object Id is listed in the object list in the above mentioned External Object Definition object.

If the referenced object is NULL or not valid the VT shall draw the object identified in the Default Object ID
attribute of the External Object Pointer object.

Note There can be multiple instances of the External Object Definition object in an object pool. If multiple
External Object Definition objects are assigned to the same NAME, then an external reference shall be
considered valid if made valid by one or more External Object Definition objects.

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Key
1 VT presentation from Working Set 1
2 VT presentation from Working Set 2
3 External Object Pointer with reference to object in Working Set 2 Object Pool
4 Referenced object in Working Set 2 (container that contains several objects), all of which are valid
5 Number Variable on Working Set 2 object pool
6 External Object Pointer with reference to object in Working Set 2 Object Pool
7 Default Object to be shown when External Objects are invalid
8 VT presentation from Working Set 1 after references are established, enabled and resolved

Figure 9 — External Object References — VT Example

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 ISO 11783-6:2014(E)

Key
1 VT Object Pool volatile memory 3 Referenced Working Set ECU (ECU 3)
2 Referencing Working Set ECU (ECU 2) 31 Referenced Working Set in VT memory
21 Referencing Working Set in VT memory 32 External Object Definition object
22 External Reference NAME Object, including 33 Object Pool Object that can be referenced from an
NAME attribute that references ECU 2s external Working Set
23 External Object Pointer Object 34 Reference to the Object Pool object that can be
24 Reference to the External Reference NAME object referenced.
25 Virtual reference established by External Object Pointer 35 Virtual reference established that allows ECU 2 to
object that informs VT to the Working Set containing the reference ECU 3 objects
referenced objects
26 Virtual reference established to the External Object of
interest.

Figure 10 — External Object References — Relationship Example

Example 1 Two External Object Definition objects have the same value in the NAME attributes. Both objects
are enabled, only one of the objects includes 1234 in the Object ID list. Object Id 1234 can be referenced.

Example 2 Two External Object Definition objects have the same value in the NAME attributes. Both objects
include 1234 in the Object ID list, only one of the objects is enabled. Object Id 1234 can be referenced.

4.6.12 Relative X/Y positions

The X, Y position attribute determines where an object is drawn on the display. This position is always relative
to the upper left corner of the parent object. The X,Y position is always found in the parent object. Figure 11 —
Relative and absolute location of objects shows an example Data Mask with the relative locations of several
objects.

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 ISO 11783-6:2014(E)

Key
1 Data Mask 3 Input Field
a
2 Container Absolute

Figure 11 — Relative and absolute location of objects

4.6.13 Overlaid objects

A mask can be built such that two objects will occupy the same or overlapping space on the display. This can
require extra processing in the VT, but could be necessary in some cases and shall be supported by the VT.
For this reason, the hierarchy or layering of objects shall be understood. Some objects have a list of contained
objects. Objects listed first are considered to be lower in the hierarchy than objects listed later. In this case,
the objects shall by drawn such that objects listed later appear to overlay objects listed earlier, so that the
entire image of the object listed last is visible, while only those areas of the object listed earlier that do not
coincide with areas of the object listed last will be visible. When an object is changed, all objects that overlay it
and which have been corrupted shall be redrawn (this is called a refresh event). All objects defined by this part
of ISO 11783 have a rectangular size either defined or implied to simplify the VT’s task of finding overlaid
objects.

When an object is changed or hidden, the VT shall update the display accordingly.

EXAMPLE Referring to Figure 12 — Object changed or hidden — Display update, where (a) shows the initial
presentation before any command is received. The Working Set then commands object 1 to be hidden. As an intermediate
step shown in (b), the VT deletes object 1 and all child objects by filling the object’s area with the background colour of the
parent mask. The VT then redraws the object along with all child objects. The VT then refreshes any other object (e.g.
object 2) that could have been visually altered in the deletion process as shown in (c). The VT may implement this refresh
in a manner where the intermediate display is never seen by the operator.

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 ISO 11783-6:2014(E)

Key
a) Initial presentation c) Final presentation
b) Intermediate operation

Figure 12 — Object changed or hidden — Display update

4.6.14 Alarm handling

Alarms allow a Working Set to display alarm information at any time. If several Working Sets have an Alarm
Mask activated, the VT shall display the masks in order of priority. Priority is determined, first, by the priority
attribute defined in the Alarm Mask object and, second, by chronological order of activation. The highest
priority alarm is always displayed until the owner Working Set changes the active mask. When more than one
Working Set has asserted an Alarm Mask with the same priority attribute, the first of these, as processed by
the VT, shall become the active mask. When the active Working Set changes to a lower priority alarm or Data
Mask, the next in turn highest priority Alarm Mask is processed.

Operator input disturbed by the activation of an Alarm Mask may be left intact for resumption once all Alarm
Masks have been acknowledged. A Soft Key Mask is associated with the Alarm Mask via an attribute in the
Alarm Mask object. Whenever the alarm is displayed, the associated Soft Key Mask is also displayed. The
following describes the protocol requirements between the VT and the Working Set raising the alarm.

a) The Working Set Master activates an Alarm Mask by using the Change Active Mask command on the
Working Set object. Only one Alarm Mask can be active per Working Set.

b) The VT responds with a Change Active Mask response.

c) Based on priorities, at some point, the VT displays the Alarm Mask and the Soft Key Mask associated with
the Alarm Mask. When a mask change occurs that causes an Alarm Mask to appear or reappear, the
acoustic signal associated with the Alarm Mask shall be activated. The VT shall terminate any acoustic
signal from a lower priority Alarm Mask that can be in process. The VT shall terminate any acoustic signal
from a control audio command that can be in process (version 4 and later VTs shall send the VT Control
Audio Signal Termination message to indicate the termination). If the Alarm Mask acoustic signal
completes, or if it is set to none for silent signal, then control audio commands from ECUs shall be
accepted as defined in the Control Audio Signal command. (See Table 2 — Working Set state changes
(VT Supports only Active Mask) and Table 3 — Working Set state changes (VT Supports Multiple Working
Sets or Window Masks Visible Simultaneously))

d) The VT notifies the Working Set with a VT Status message sent to the global address.

e) At some point the operator may acknowledge the alarm with the proprietary ACK means on the VT. The
VT sends a Soft Key Activation message to the Working Set with key code set to zero (0) based on the

32
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 ISO 11783-6:2014(E)

operator action (See Clause 4.6.18). Alternately, the Working Set may deassert the Alarm Mask based on
its internal logic.

f) The Working Set may choose to ignore the ACK means if the ACK is not allowed or the Working Set may
change the active mask to either an Alarm Mask or a Data Mask by using the Change Active Mask
command on the Working Set.

g) The VT responds with the Change Active Mask response.

h) The VT displays a new mask. (See Table 4 — VT behaviour on mask transition)

Table 4 — VT behaviour on mask transition

Working Set’s
active mask Is requester the
attribute Current active VT behaviour
Working Set?
From/To

Data to data Yes Hide current Data Mask, show new Data Mask.
Data to data No If the VT design supports only one visible Data Mask, then no visual change.
If the VT design supports multiple visible Data Masks and this Working Set is
currently visible, then hide the current Data Mask, show new Data Mask.
Data to alarm Yes Hide Data Mask, show Alarm Mask.
Data to alarm No If this is the highest priority alarm, deactivate the current Working Set and
activate this Working Set.
Alarm to alarm Yes If this is the highest priority alarm, hide current Alarm Mask, show new Alarm
Mask.
Otherwise, deactivate this Working Set and activate the Working Set of the
highest priority alarm.
Alarm to alarm No If this is the highest priority alarm, deactivate the current Working Set and
activate this Working Set.
Alarm to data Yes If an alarm exists in another Working Set, deactivate this Working Set and
activate the Working Set with the highest priority alarm.
Otherwise, if this Working Set had the last visible Data Mask, hide the Alarm
Mask and show the Data Mask.
Otherwise, deactivate this Working Set and activate the Working Set which
had the last visible Data Mask.
Alarm to data No No visual change.

4.6.15 Clipping

Most objects defined in this part of ISO 11783 have a given or implied size. The VT shall clip anything drawn
outside the defined size of the object. Clipping is always done on a graphical (i.e. pixel) basis.

These clipping rules also apply to text and numeric objects. When the text does not completely fit inside the
defined object area, in both wrapping and non-wrapping cases, the graphical clipping rules apply and the
presentation is clipped on a graphical (i.e. pixel) basis. (See Figure 13)
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 ISO 11783-6:2014(E)

Figure 13 — Clipping examples

4.6.16 Scaling

4.6.16.1 General

The Working Set shall determine the size of the VT’s Data Mask area and Soft Key designator and make
appropriate adjustments to its object definitions. These adjustments may be applied either before or after
transmission of its object pool to the VT, as long as the transmitted pool is not invalid for the VT (e.g. cannot
transmit colour objects to a black and white VT and then change object to black and white). This gives
complete control of the appearance of the masks to the Working Set.

4.6.16.2 Positions and sizes

The Working Set shall scale positions and object sizes to adapt to the VT’s Data Mask area and Soft Key
designator(s).
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

4.6.16.3 Fonts

The Working Set shall apply a best-fit algorithm to determine and select the best font for the defined area. The
Working Set shall also ensure that the VT supports the selected fonts and font styles. The smallest font size is
6 × 8. If the scaled height and width of the original font is less than 6 × 8, the 6 × 8 font shall be used. This
could result in clipping if the text is near the edge of the field object, or in text overlap if two occurrences of text
are too close together after scaling the object size independently of the font size. Working Set designers shall
be aware of this limitation and shall take the necessary steps. (See Clauses 4.6.19.3 Non-proportional fonts,
and 4.6.19.4 Proportional fonts)

4.6.16.4 Picture graphic objects

Bitmap graphics are automatically scaled by the VT according to the width attribute in the Picture Graphic
object.

4.6.17 Operator input

Whenever the VT displays a Data Mask that contains one or more enabled visible input objects or Buttons, it
can be in one of the following states:

a) Navigating

b) Data input

When determining the visibility of an input object, the object shall be considered visible even under the
following conditions:

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 ISO 11783-6:2014(E)

⎯ the object’s width or height equals zero

⎯ the object is covered in its entirety by another object

⎯ the object is wholly outside the clipping limits of the parent object hierarchy as defined by the width and
height attributes of all the parents in the hierarchy

Objects with width or height of zero, and objects that are wholly outside the clipping limits of the parent object
hierarchy are discouraged as activation may not be possible (e.g. touch screen). The Working Set designer
may consider enabling and disabling these objects as needed so the Working Set navigation is more
predictable in operation.

When a new active data-mask is selected the state is reset to ‘Navigating’. If an Alarm Mask is selected then
the VT may remember the state and if the Working Set returns to the same data-mask after showing the
alarms then the state can be restored. If this approach is implemented and the ECU returns to a different Data
Mask after showing alarms, the VT shall consider it as a normal Data Mask change and send the appropriate
messages. (See Table 5 — VT Reaction to navigation and data input events)

The initial focus point, if any, and the tab order for navigating to the various input fields or buttons is VT
proprietary, but the ECU shall be aware that the tab order may be defined by the definition order of the input
objects in the parent object.

The VT may choose not to send the VT Select Input Object message for every object that the operator passes
through while navigating. E.g. if the navigation means is a rotary control, the focus will change rapidly while
the operator is spinning the control. In such a case the VT may choose only to send the VT Select Input
Object message to the input object which loses focus and the one which eventually gets focus.

In the ‘Navigating’ state the VT shall indicate to the operator which (if any) input is selected (has focus). The
method of indication is proprietary to the VT. The VT may open an input object for data input as soon as the
object gets focus, and it may remove focus when input is done. This is common, but not required, behaviour
for touch screens.

Examples of focus-indicators include (but is not limited to) adding a frame around the input field, changing the
background colour of the input field, or momentarily highlighting the input field on a touch screen VT.

The VT designer should be aware that the use of the Select Input Object command by the Working Set can be
a means by which the Working Set designer intends to focus the operator attention to an input field (e.g. a
setup wizard where the recommended action is highlighted).

The VT shall indicate the disabled input objects. The means to represent disabled input objects is VT
proprietary. Visual changes to disabled objects to indicate the disabled state shall not extend beyond the
width/height of the object and the object shall remain legible.

Working Sets may apply a frame around, or distinct background colour to, input objects as an aid to the
operator in identifying input fields.

In the ‘data input’ state the VT behaviour is proprietary, and the VT may cover part or all of the Data Mask
while the object is open for data input. Changes to the attributes of an input object during the data input
process shall not affect the value currently being input (e.g. changes to an Input Number Scale shall not alter
the apparent value being input ).

The VT reacts to navigation related events. (See Table 5 — VT Reaction to navigation and data input events)

Table 5 — VT Reaction to navigation and data input events

Current Command/Event New state Response frames

state (shall be sent in the indicated sequence)
Navigating Select Input Object Navigating Select Input Object response

35
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Current Command/Event New state Response frames

state (shall be sent in the indicated sequence)
command
(byte 4 = FF16)
Navigating Enable/Disable Navigating (The object becomes disabled and loses focus - VT may
Object command (to move focus to the next input object)
disable the object Enable/Disable Object response
which has focus) VT Select Input Object message (on object which loses
focus)
VT Select Input Object message (on object which gets
focus – if any)
Navigating Change Active Mask Navigating VT Select Input Object message (on object which loses
command (only if focus – if any)
new mask is a new Change Active Mask response
Data Mask, or if the VT Status message (with new Data Mask)
new mask is an VT Select Input Object message (on object which gets
Alarm Mask and the focus – if any)
VT does not store the
state of the input
object)
Navigating ESC command Navigating ESC response (with error code indicating that no input is
open for input )
Navigating Operator activates a Navigating Button Activation message
selected Button
object
Navigating Operator navigates Navigating VT Select Input Object message (on object which loses
to a new object focus – if any)
VT Select Input Object message (on object which gets
focus – if any)
Navigating Operator opens the Data input VT Select Input Object message (on object which
object for data input has/gets focus)
Navigating Select Input Object Data input Select Input Object response
command
(byte 4 = 0016)
Data input Select Input Object Data input Select Input Object response (with error code indicating
command (Selecting that another input field is currently being entered)
an object that does
not currently have
focus)
Data input Enable/Disable Data input (the object stays enabled and maintains focus)
Object command (to Enable/Disable Object response (with error code
disable the object indicating that operator input is active)
which has focus)
Data input Change Numeric Data input Change Numeric Value response (with error code
Value command (on indicating that the object is in use)
the object that has
focus)
Data input Change String Value Data input Change String Value response (with error code
command (on the indicating that the object is in use)
object that has focus)
Data input Change Active Mask Navigating VT ESC message
command (only if VT Select Input Object message(on object which loses
new mask is a new focus – if any)
Data Mask, or if the Change Active Mask response
new mask is an VT Status message (with new Data Mask)
Alarm Mask and the VT Select Input Object message (on object which gets
VT does not store the focus – if any)
state of the input

36 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Current Command/Event New state Response frames

state (shall be sent in the indicated sequence)
object)
Data input Change Attribute Data input Change Attribute response (with error code indicating
command (of the that the object is in use)
object that has focus)
Data input Change List Item Data input Change List Item response (with error code indicating
command (on the that the object is in use)
object that has focus)
Data input Pool Update alters Navigating VT ESC message
the object which has VT Select Input Object message (on object which loses
focus focus – if any)
VT Select Input Object message (on object which gets
focus – if any)
Data input Parent Container is Navigating VT ESC message
hidden VT Select Input Object message (on object which loses
focus – if any)
VT Select Input Object message (on object which gets
focus – if any)
Data input Pointer to this object Navigating VT ESC message
is changed to not VT Select Input Object message (on object which loses
reference this object focus – if any)
VT Select Input Object message (on object which gets
focus – if any)
Data input ESC command Navigating ESC response
VT Select Input Object message (on object which
has/loses focus)
Data input Operator activates Navigating VT ESC message
the ESC means VT Select Input Object message (on object which
has/loses focus)
Data input Operator activates Navigating VT Change Numeric Value message or VT Change
the ENTER means String Value message (even if the new value is the
same as the old)
VT Select Input Object message (on object which
has/loses focus)

4.6.18 Soft Key and Button activation

Whenever a Key object or Button object or ACK key is pressed, released, or latched, the VT sends a Soft Key
Activation message or Button Activation message to the working Set Master. If a Macro is associated with the
key press, the VT executes it. Performance of the operator interface can be improved by associating a Macro
with the key press event to cause another event, such as activating a different mask. See Table B.11 — Key
events and Table B.13 — Button events.

Note For VT version 5 and later, the ACK key shall send messages (pressed, held, released) consistent with Key
and Button objects. In VT version 4 and prior, this was not well defined and led to variations in implementation.

If a Key object or non latchable Button object is erased from the screen (e.g. due to a Change Active Mask
command, Change Soft Key Mask command, Hide/Show Object command, etc) while it is activated, the VT
shall send a Soft Key Activation message or Button Activation message indicating released to the erased
object on its parent Data Mask. The VT shall then ignore the physical key until the operator has released it. If
a Button object is moved to a new location on the active mask, while it is still pressed, the behavior depends
on the method of activation. If the Button object was activated by a physical key, then the Button object stays
pressed. If the Button object was activated by touch screen, pointing device or similar, and the object is
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

moved to a location that is no longer under the touch point, the VT shall send a Button Activation message
indicating released and shall then ignore the touch until the operator physically releases.

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 ISO 11783-6:2014(E)

For example, when changing the visible Data Mask, the VT shall send the Soft Key Activation message
indicating released for the activated object for the previous mask. It shall not send a Soft Key Activation
message for the new mask.

When the “VT supports simultaneous activation of all combinations of Physical Soft Keys” bit (See Clause D.9
Get Hardware response) is zero, the VT shall only support the activation of a single Soft Key at a time and
only in the prescribed sequence of <no Keys pressed> : <Key pressed> : [<Key held>] : <Key released> : <no
Keys pressed>. If a second Soft Key is pressed while a first Soft Key has already been detected as
pressed/held, it shall be ignored. When simultaneous activation is supported, the VT sends overlapping
messages (e.g. <no Keys pressed> : <Key 1 pressed> : [<Key 1 held>] : <Key 2 pressed> : <Key 1 released>
: <Key 2 released> : <no Keys pressed>).

When the “VT supports simultaneous activation of all combinations of Buttons” bit (See Clause D.9 Get
Hardware response) is zero, the VT shall only support the activation of a single Button at a time and only in
the prescribed sequence of <no Buttons pressed> : <Button pressed> : [<Button held>] : <Button released> :
<no Button pressed>. If a second Button is pressed while a first Button has already been detected as
pressed/held, it shall be ignored. When simultaneous activation is supported, the VT sends overlapping
messages (e.g. <no Buttons pressed> : <Button 1 pressed> : [<Button 1 held>] : <Button 2 pressed> :
<Button 1 released> : <Button 2 released> : <no Buttons pressed>).

If a Key or Button is found to be pressed at power on, it shall not be reported as held; however this can be
cause for VT to report a diagnostic message to the operator.

4.6.19 Font rendering

4.6.19.1 General

4.6.19.2 Text justification

Text based objects have a justification attribute. Field justification indicates how a text string is positioned
horizontally and vertically within the field defined by the width and height attributes. In version 3 and prior VTs,
text justification was done on a character basis but was not precisely defined. In version 4 and later VTs, text
justification is always done on a graphical (i.e. pixel) basis.

The extents of a text character (See Figure 14) shall be graphically justified as described in the following
sections but some white space is permissible if the VT’s font rendering engine reserves space for ascenders
and descenders or for the character itself.

38 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Key
1 Graphical extents of the character.
2 Ascender area may create white space depending on VT design
3 Character rendering itself may create white space depending on VT design
4 Descender area may create white space depending on VT design

Figure 14 — Graphical Extents of a Character

During data input of a text based object, the VT designer may choose to suppress justification until the field is
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

closed after data input.

NOTE These modifications shall be done for visual justification – the stored value is not modified.

4.6.19.2.1 Horizontal left justification

When left justified, the VT shall not remove any leading spaces and the first character in the string is
positioned and visible at the left side of the text field area. If auto-wrapping is enabled, the rules of auto-
wrapping overrule and leading spaces on subsequent lines are trimmed before justification. If the string does
not fit in the defined text field area, and auto-wrapping is not enabled, the string shall be graphically clipped on
the right side. If auto-wrapping, justification rules apply to each new line. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area.

EXAMPLE 1 Left justification, no auto-wrap, no leading spaces, "Left Justified"

EXAMPLE 2 Left justification, no auto-wrap, one leading space, " Left Justified"

EXAMPLE 3 Left justification, no auto-wrap, clipping on the right, "Left Justified Text"

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 ISO 11783-6:2014(E)

EXAMPLE 4 Left justification, auto-wrap, no leading spaces

EXAMPLE 5 Left justification, auto-wrap, one leading space

4.6.19.2.2 Horizontal middle justification

When middle justified, the VT shall remove all leading and trailing spaces before justifying the string. The
string shall be centered in the text field on a pixel basis. If the string does not fit in the defined text field area,
and auto-wrapping is not enabled, the string shall be graphically clipped on the left and right sides. If auto-
wrapping, justification rules apply to each new line. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area.

EXAMPLE 1 Middle justification, no auto-wrap, no leading or trailing spaces, "Middle Justified"

EXAMPLE 2 Middle justification, no auto-wrap, five leading and one trailing space (leading and trailing spaces are
removed) , " Middle Justified "

EXAMPLE 3 Middle justification, no auto-wrap, clipping on the left and right, "Middle Justified"

EXAMPLE 4 Middle justification, auto-wrap, no leading or trailing spaces, "This is middle justified, wrapped text!"

EXAMPLE 5 Middle justification, auto-wrap, one leading and one trailing space (leading and trailing spaces are
removed), " This is middle justified, wrapped text! "

40 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`--- © ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

4.6.19.2.3 Horizontal right justification

When right justified, the VT shall remove any trailing spaces before justification and the last character in the
string is positioned and visible at the right side of the text field area. If the string does not fit in the defined text
field area, and auto-wrapping is not enabled, the string shall be graphically clipped on the left side. If auto-
wrapping, justification rules apply to each new line. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area.

EXAMPLE 1 Right justification, no auto-wrap, no trailing spaces, "Right Justified"

EXAMPLE 2 Right justification, no auto-wrap, one trailing space (space is removed) , "Right Justified "

EXAMPLE 3 Right justification, no auto-wrap, clipping on the left, "Right Justified Text"

EXAMPLE 4 Right justification, auto-wrap, no trailing spaces, "This is right justified, wrapped text"

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
EXAMPLE 5 Right justification, auto-wrap, one trailing space (space is removed) , "This is right justified, wrapped text
"

4.6.19.2.4 Vertical top justification

Vertical top justification is available in VT version 4 and later. When vertical top justification is enabled, the VT
shall display the text string starting at the extreme top of the defined text field area. This rule applies
regardless of the auto-wrapping attribute. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area and in all examples the
text is also left justified.

EXAMPLE 1 Top justification, no auto-wrap, "Vertical Top"

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 ISO 11783-6:2014(E)

EXAMPLE 2 Top justification, auto-wrap, "Vertically Top Justified Text"

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
EXAMPLE 3 Top justification, auto-wrap, "Vertically<CR><CR>Top Justified Text"

4.6.19.2.5 Vertical middle justification

Vertical middle justification is available in VT version 4 and later. When vertical middle justification is enabled,
the VT shall display the text string graphically centered vertically in the defined text field area. This rule applies
regardless of the auto-wrapping attribute. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area and in all examples the
text is also left justified.

EXAMPLE 1 Vertical middle justification, no auto-wrap, "Vertical Middle"

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 ISO 11783-6:2014(E)

EXAMPLE 2 Vertically middle justification, auto-wrap, "Vertically Middle Justified Text"

EXAMPLE 3 Vertically middle justification, auto-wrap, "Vertically Middle<CR><CR>Justified Text"

4.6.19.2.6 Vertical bottom justification

Vertical bottom justification is available in VT version 4 and later. When vertical bottom justification is enabled,
the VT shall display the text string with the bottom edge of the text block along the bottom edge of the defined
text field area. This rule applies regardless of the auto-wrapping attribute. Blank lines are not removed.

In the examples below, the box represents the extents of the defined text field area and in all examples the
text is also left justified.

EXAMPLE 1 Bottom justification, no auto-wrap, "Vertical Bottom"

EXAMPLE 2 Bottom justification, auto-wrap, "Vertically Bottom Justified Text"

© ISO 2014 – All rights reserved 43

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--```,`,`,,``,,`

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 ISO 11783-6:2014(E)

EXAMPLE 3 Bottom justification, auto-wrap, "Vertically Bottom<CR><CR>Justified Text"

4.6.19.3 Non-proportional fonts

The VT shall support non-proportional block fonts. Sizes are always given in X-Y pairs. For example, 8 × 10
indicates a character size of 8 pixels wide by 10 pixels high. Characters shall not exceed the size of the box
defined by the font size, regardless of style. For example, an 8 × 10 font set to bold and italics shall still fit
inside the 8 × 10 pixel area. It is suggested that space be left on the bottom and right sides on the inside of the
box to accommodate characters placed side by side or row by row. (See Figure 15 — 8 × 10 fonts —
Example)

Dimensions in pixels

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Key
1 bold 3 bold italic
2 normal (upright)

Figure 15 — 8 × 10 fonts — Example

The VT designer may choose the font sizes and styles to be made available but the default 6 × 8 font, normal
(upright) style, is a minimum requirement. The Get Text Font Data message can be used by a Working Set to
determine the VT’s font capabilities. Characters can be rendered transparent (background shows through) or
opaque (solid background colour) depending on the options attribute of the applicable object.

4.6.19.4 Proportional fonts

In version 4 and later VTs, as an option, the VT design may allow for proportional font rendering. In this case
the width of each character is variable and the height attribute is fully scalable in the range from 8 pixels up to
and including the largest supported font height as identified in D.7 Get Text Font Data response. As a result,
only the height attribute of the font size applies and the width attribute is ignored. Therefore, the rendered
characters shall not exceed the height of the chosen font size.

For example, if the VT responds to a Get Text Font Data message with Byte 6 = 1016, and Byte 7 = 0216, then
the largest reported non-proportional font size is 48 pixels wide by 64 pixels in height. If the VT has indicated
support for proportional font rendering (Byte 8 bit 7 = 1), then the VT supports a proportional font height from 8
up to and including the value 64, in 1 pixel resolution. Due to characteristics of the implemented font rendering

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 ISO 11783-6:2014(E)

engine, and the shape of the characters, 1 pixel resolution may not be detectable for every character, even
though it is supported.

Normal clipping rules still apply and Working Set designers have to be aware of the variable nature of the font
width and therefore assign sufficient width to the text field. Implements can query the VT’s font capabilities,
including the support of proportional font rendering, via the Get Text Font Data message and may choose the
proportional rendering option in the font style attribute of the Font Attributes object. If the implement requests
a proportional font rendering and the VT does not support this option, the VT shall respond in one of two
ways:

⎯ if a Font Attributes object indicates proportional font during the validation of an object pool, the object pool
shall be rejected

⎯ if a Change Font Attributes command is received with invalid size and/or font type, a Change Font
Attributes response shall be sent indicating an error in the size and/or type

The following general rules apply for the support of Proportional font rendering:

⎯ a VT that indicates support for proportional fonts shall support the full height scaling range of 8 to the
largest supported font size as identified in Get Text Font Data response. Character width is recognized to
be variable.

Before using proportional fonts, Working Sets shall query the VT to determine if proportional font rendering is
supported by the VT. If not supported, only non-proportional fonts shall be used in the pool upload and
subsequent Change Font Attributes commands.

4.6.19.5 Auto-wrap

If the amount of text to display is longer than the width of the text object, and auto-wrap is enabled, then
regardless of non-proportional or proportional rendering, the VT shall format and wrap the text into the next
line(s). The text shall not exceed the boundaries defined by the width of the text object. Wrapping shall occur
under these conditions:

⎯ Space (2016) between words.

⎯ Soft Hyphen (AD16). When wrapping occurs on the soft hyphen, the soft hyphen shall be shown before
the line break; otherwise the soft hyphen is not shown.
⎯ Hyphen (2D16). Wrapping can occur between a hyphen (2D16) and the following character, when the
Wrap on Hyphen option bit in text objects is TRUE.
⎯ If, after applying the above rules, there is no breaking point in the line, then wrap on the last wholly
visible character in the line (see Figure 13).
⎯ At line end (See Clause 4.6.19.6 Non-printing characters in strings)
Leading space characters on the next line shall be suppressed and not considered in additional auto-wrap
decisions.

4.6.19.6 Non-printing characters in strings

VT version 3 and prior allowed CR, LF, and BS control characters in strings. The rendered presentation was
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

not precisely defined.

The following clarification applies to VT version 4 and later.

⎯ BS (Back Space) is ignored as are other characters denoted with scissors in Annex L.
⎯ Single CR (Carriage Return) is interpreted as a line end
⎯ Single LF (Line Feed) is interpreted as a line end

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 ISO 11783-6:2014(E)

⎯ Sequence CRLF is interpreted as a line end

⎯ 0016, or 000016 (WideChar) shall terminate the presentation even if this occurs before the defined string
length. All characters following the terminating zero shall be ignored, both for data input and
presentation. Editing may increase the apparent string length up to the defined string length, but shall not
limit the editing of strings, which is controlled by the length attribute.

Based on these definitions

⎯ Sequence LFCR is interpreted as two line ends

Other non-displayable characters shall not advance the cursor during drawing or alignment decision making.
The VT can remove these characters from the string to facilitate more efficient processing.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
VT Presentation
String Data
Left Alignment Middle Alignment Right Alignment
String 1:
ABCDEFCRGHIJKL ABCDEF ABCDEF ABCDEF
or GHIJKL GHIJKL GHIJKL
ABCDEFLFGHIJKL
or
ABCDEFCRLFGHIJKL

String 4: MNOPQR MNOPQR MNOPQR

MNOPQRLFCRSTUVWX ¶ ¶ ¶
STUVWX STUVWX STUVWX

NOTE: “¶” shown for examples and would not be visible on the VT

Figure 16 — CR and LF application to test strings

4.6.19.7 String encoding

Text strings can be encoded with either 8-bit characters (chars) or Unicode/ISO10646 characters
(WideChars).

VT Version 3 and prior supported Font types are shown in “Table L.1 — ISO 8859-1 (Latin 1) character set”
and “Table L.2 — ISO 8859-15 (Latin 9) character set”.

VT Version 4 and later supported Font types are shown in “Table L.1 — ISO 8859-1 (Latin 1) character set”
through “Table L.6 — ISO 8859-7 (Greek) character set” and “Table L.7 — WideString minimum character
set”.

The character set is indicated by the Font type attribute of the Font Attributes object.

WideStrings shall be encoded according to UTF-16 (Unicode Transformation Format - 16 bit) and therefore
they always start with the Byte Order Mark (BOM) character FEFF16. BOM is not a displayable character and
is not considered part of the text string.

UTF-16 allows both big- and little-endian encoding, but WideStrings in ISO11783-6 shall always be encoded
as little-endian.

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 ISO 11783-6:2014(E)

BOM is used to distinguish between 8-bit strings and WideStrings.

If the first two bytes are FF16, FE16 it is a WideString, otherwise it is an 8-bit string.

The length attribute of an object or message always indicates the number of bytes in the text string, therefore
the number of characters in a WideString shall be found as:

number of WideChar = length/2 – (number of surrogate pairs) – 1

e.g. FF,FE,41,00,42,00,08,D8,AC,DC => “AB€”, [length = 10, number of surrogate pairs = 1,

number of WideChar = 3]

If the length attribute does not indicate an even number of bytes the last byte is ignored.

The VT may support any character defined by Unicode/ISO10646, but as a minimum it shall support the
characters listed in Table L.7 — WideString minimum character set.

The Font type attribute of the Font Attributes object is ignored for WideStrings.

The VT shall display WideStrings even if the WideStrings contain characters which are not supported by the
VT.

The VT shall substitute unsupported characters by a displayable character. The displayable character may be
VT proprietary (e.g. ‘□’).

The encoding of

Input String object values shall not be changed by the VT, i.e. if an

Input String object contains (or references) a WideString, the VT Change String Value message sent by the
VT shall also contain a WideString.

Characters above FFFF16 are represented by a 32 bit ‘surrogate pair’, which consists of a high surrogate
followed by a low surrogate.

The surrogate pair is constructed as follows:

a) S = character - 1000016

b) High surrogate = D80016 + (S shifted 10 bits to the right)

c) Low surrogate = DC0016 + (10 least significant bits of S)

The highest character defined by Unicode and ISO10646 is 10FFFF16, corresponding to the surrogate pair
DBFF16, DFFF16.

4.6.20 Object Rendering Accuracy, Quality and VT Developer Freedom

It is in the intent of this standard to enable interoperability among equipment from different manufacturers, and
to do so in a manner that successfully conveys the original design accurately enough for proper interpretation
by the operator.
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Many of the VT objects in this standard do not have all elements of their presentation explicitly defined. The
implementation chosen by the developer may be one that favors computing performance, visual style, or other
factors that are outside the definitions in this standard. The Output Meter object is an example where the
developer defines some elements of the presentation. For example, even though the bounding width, height,
and values are clearly defined, the developer can define the size and shape of the needle. Other examples

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 ISO 11783-6:2014(E)

include the Output Linear Bar Graph object (e.g. fill, set point mark, tic mark size and position), and Output
Line objects not conforming to a strict 0, 45, or 90-degree orientation. Drawing algorithms as may be used to
render these types of objects can produce similar but varying results (e.g. two diagonal lines drawn with
slightly different line drawing algorithms). Pixel level accuracy in this case may not be possible. Where pixel
level accuracy is required, the designer should consider a Picture Graphic object, while also ensuring that the
VT does not scale this object (e.g. the Width attribute is equal to the Actual width attribute).

4.6.21 Filling output shape objects

When solid-filling output shape objects on the VT, flood-fill or boundary-fill type algorithms are not suitable,
since objects can be overlaid and interrupt the fill. There are also performance problems with this type of
approach. Scan-line type fills shall be implemented. In addition, only the interior area of the object, not
including any pixel that is/would be part of the border, shall be included in the fill. Incorrect filling would be
particularly visible when line art is used on the border or when the border is completely or partially suppressed
(i.e. rectangles).

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NOTE All rectangles width = 10, height = 8, line width = 2, filltype = solid grey
a
rectangle width = 10, height = 8, line width = 2, filltype = solid grey, line art 1010 ..
b
rectangle width = 10, height = 8, line width = 1, filltype = solid grey, line art 1010 ..

Figure 17 — Rectangle line suppression and filling examples

Pattern fills of Output Shape objects shall be done according to the following rules:

⎯ The pattern shall be a Picture Graphic object whose width is integer divisible by 8. The raw data is used
for the pattern and the object is not scaled regardless of the attributes of the object.

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 ISO 11783-6:2014(E)

⎯ The upper left corner of the pattern buffer is anchored to the upper left corner of the VT’s physical Data
Mask, individual designator, or user-layout window mask and repeats across and also down. This rule
ensures that the pattern matches between objects in the Data Mask Area and that the pattern fill looks the
same on all VT designs.

⎯ Transparency and flashing option attributes shall be ignored for fill patterns.

Filling and line suppression examples are shown in Figure 17 — Rectangle line suppression and filling
examples to Figure 19 — Polygon filling examples (Without and with border line art).

Figure 18 — Ellipse filling examples (Without and with border line art)

Figure 19 — Polygon filling examples (Without and with border line art)

4.6.22 Events

4.6.22.1 General

Manipulation of objects in an object pool by a Working Set or by the VT causes certain events to occur.
Events can be caused by commands or by VT actions in response to a command or by other events. Many
objects defined by this part of ISO 11783 have an optional list of event and Macro groupings.

If the occurring event has one or more Macros associated with it, the Macro or set of Macros is executed by
the VT when the command has been accepted by the VT as a valid command. Macros are executed in the
order they are encountered in the event/Macro list. Using events and Macros can make the VT operator
interface more responsive, since the Working Set Master does not need to be directly involved in responding
to the event.

EXAMPLE 1 A Soft Key press event could cause an appropriate Data Mask to be made active.

EXAMPLE 2 A Soft Key press event could cause two separate Macros to execute, one to make a new Data Mask
active and one to control the audio signal.

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 ISO 11783-6:2014(E)

EXAMPLE 3 A Change Numeric Value command with an invalid value causes rejection of the command and an
associated Macro is not executed. A Change Numeric Value command with a valid value, even if the value is the same as
already in the value field, will cause the associated Macro to execute.

EXAMPLE 4 A container with an On Hide Macro is already hidden. A Hide Show command with the parameter set to
hide the container is valid and will cause the associated Macro to execute.

NOTE The same event id may be listed more than once in the event/Macro list of any given object.

4.6.22.2 Macro references – VT version 4 and prior

Version 4 and prior VTs provide 2 bytes for each event and Macro grouping within the object definition. This
means one byte for the Event ID and one byte for the Macro ID, limiting the Object IDs for Macro objects to
the range of 0 to 255.

A VT version 4 single Macro reference has the following structure:

− First byte: Event ID (in the range of 0 to 25410)

− Second byte: Macro ID (in the range of 0 to 25510)

4.6.22.3 Macro references – VT version 5 and later

Version 5 and later VTs, in addition to the 8-bit Macro Object IDs, shall support Macros with an Object ID in
the range of 0 to 65534, requiring the use of 16-bit Object IDs for Macros. To maintain backwards
compatibility, Macro references within objects are based on the same structure with 2 bytes per grouping, but
two of these groupings are used to reference a macro with 16-bit Object ID. An Event ID of 255 in the first byte
of the Macro reference indicates that two groupings shall be concatenated to a single grouping with a 16-bit
Macro Object ID reference.

A VT version 5 single 8-bit Macro reference has the following structure:

− First byte: Event ID (in the range of 0 to 25410)
− Second byte: Macro ID (in the range of 0 to 25510)

EXAMPLE A Container object references a Macro with 8-bit Object ID 710 (0716) that shall be executed when the
container is hidden. The event and Macro grouping within the definition of the Container object is as follows:

First byte: Event ID = 0416 (on hide)

Second byte: Macro ID = 0716

A VT version 5 single 16-bit Macro reference has the following structure:

− First byte: Event ID 25510 (Use Extended Macro Reference)
− Second byte: Low byte of Macro ID (Macro ID in the range of 0 to 6553410)
− Third byte: Event ID (in the range of 0 to 25410)
− Fourth byte: High byte of Macro ID (Macro ID in the range of 0 to 6553410)

EXAMPLE A Container object references a Macro with 16-bit Object ID 700010 (1B5816) that shall be executed when
the container is hidden. The event and Macro grouping within the definition of the Container object is as follows:

First byte: Event ID = FF16 (Use Extended Macro Reference)

Second byte: Macro ID = 5816
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Third byte: Event ID = 0416 (on hide)

Fourth byte: Macro ID = 1B16

4.6.23 Touch screens and pointing devices

The VT design can optionally support a touch screen or a pointing method such as a mouse or joystick. The
Working Set can determine the VT’s capabilities in this regard by using a Get Hardware message and then
make necessary adjustments to its object pool. A Button object is defined to allow touchable or clickable
buttons to be included in a Data Mask. A Pointing Event message is defined to allow the VT to notify the

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 ISO 11783-6:2014(E)

active Working Set that an area of the Data Mask (or Alarm Mask) not associated with a button or other input
object has been touched or clicked on.

4.6.24 Proprietary Means

There are various proprietary means supported by the VT (Proprietary Objects, Proprietary Events,
Proprietary Colours, Proprietary Commands, and Proprietary Fonts). Use of these proprietary means where
the Working Set is provided by a different manufacturer than that which provides the VT is not recommended
in order to provide maximum ISO compatibility. As these items are proprietary, the Working Set or VT
manufacturer may change their proprietary means without disclosure.

Further, and in the context of the Proprietary Objects, it is not possible to parse an object for which the
definition is not known, and attempting to do so may cause the VT to reject the pool.

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Additionally, Working Sets and VTs may exchange, and support, higher version messages and objects without
violating this standard as long as those features do not contradict the requirements defined for the lower
version (e.g. a version 2 VT may support Font type 5 – Cyrillic, even though not part of the standard until
version 4). Even as this mechanism leverages the standard, it shall be considered a proprietary means as it is
not defined in the lower version. Therefore, a proprietary means is required to determine if the connected VT
or Working Set supports the newer features, and the ECU should not assume that the new features are
supported to avoid undefined behavior.

4.6.25 VT Number

By default, VT’s shall be factory set to function instance zero (0), but will retain the function instance as
configured by the operator. A mechanism is required in order to conveniently resolve conflicts in the case
where there are multiple VT’s with the same function instance and in the case where there is no VT with
function instance zero. The VT shall be responsible for providing a proprietary means for setting the function
instance from the display itself. This means shall ensure that duplicate function instances between VT’s are
not created. The new function instance shall not be used until a re-initialization of the VT is performed (see
clause 4.6.6). The VT with function instance zero (0) is defined as the “primary VT”.

The proprietary means to set the function instance shall represent to the operator a VT Number (See Clause 3
Terms and definitions). In this way, VTs from all manufacturers will present a consistent numbering scheme
for the operator to choose the primary (and secondary) VT(s). To facilitate easy VT identification, the Identify
VT message may be used.

4.6.26 Packet Padding

All VT to ECU and ECU to VT messages that are not explicitly defined to contain exactly 8 data bytes shall be
padded to the 8 byte boundary with FF16.

4.7 Displaying Data from Multiple Working Sets on One Mask

4.7.1 General

Clause 4.7 and all subordinate clauses apply to VT version 4 and later.

4.7.1.1 Displaying Data on one screen

The VT may provide a means where data from multiple Working Sets can be made available on one screen.
Depending upon the VT design, it is also possible that data from multiple Working Sets can be made available
simultaneous to the VTs standard Data Mask and Soft Key Mask. See example in Figure 20.

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 ISO 11783-6:2014(E)

Key
1 Key Group Objects in non-VT area (shaded regions indicate independent Key Groups)
2 Window Mask Objects in non-VT area
3 VT area (presenting standard VT screen or User-Layout Data Mask and User-Layout Soft Key Mask)

Figure 20 — Displaying data from multiple Working Sets - Example

4.7.1.2 Minimal Requirements

This is an optional feature. However, as a minimum, the VT shall be required to parse the Window Mask and
Key Group objects even if not supported. This allows Working Sets to upload these objects to all version 4
and later VTs without modification of the object pool. If this feature is supported, the VT shall support the 'free
form' (type 0) window mask type of the Window Mask object as a minimum. Any number of the other non-zero
window mask types may also be supported as desired. Working Set designs may desire the use of any of the
window mask types so implementation, by the VT design, of all window mask types is encouraged. If the
Working Set uploads a Window Mask object with an unsupported window mask type, the VT shall parse, but
ignore, this object and no errors shall be raised. Unsupported window mask types would not be presented to
an operator for selection.

If the Working Set chooses to participate in this feature, it shall upload Window Mask and Key Group objects
as part of the object pool. Since the VT shall parse but ignore any Window Mask objects with unsupported
window mask type, no modification of the object pool is necessary.

4.7.2 User-Layout Data Mask

The VT may support any number of User-Layout Data Masks. User-Layout Data Masks are special Data Mask
objects that are owned by the VT. The VT shall provide a mechanism to allow the operator to access the
available User-Layout Data Masks.

Each User-Layout Data Mask is the same size as a standard Data Mask object but is divided into a grid of
Window Cells with exactly two columns and six rows (See Figure 21).

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 ISO 11783-6:2014(E)

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Key
1 User-Layout Data Mask showing 12 Window Cells

Figure 21 — User-Layout Data Mask

4.7.3 Window Mask object

Window Mask objects, optionally supplied in the object pools of Working Sets, are placed into a specific User-
Layout Data Mask grid as desired by the operator of the VT. An individual Window Mask object may take up
more than one Window Cell, and may take up the entire 2x6 grid. 1x1 Window Masks are recommended
where possible to allow the operator to select from a wide range of Window Mask objects to display in each
User-Layout Data Mask. (See example in Figure 22).

NOTE Window Mask objects are not limited to the sizes shown in Figure 22.

4.7.4 Window Mask content

4.7.4.1 Presentations

A Window Mask object can display content using two different types of presentations. This is controlled by the
Working Set, using a Window Type attribute. More details are available in Clause 4.7.16 Uploading New
Window Mask and Key Group objects.

4.7.4.2 Working Set defined presentation

If the Window Mask object has a Window Type of zero, the Window Mask object behaves very similar to a
Data Mask object (other than the “size” of the Window Mask object). As with a Data Mask object, all content
and presentation is defined by the Working Set.

4.7.4.3 VT defined presentation

If the Window Mask object has a Window Type in the allowed set of non-zero values, the Working Set
provides references to a specific set of objects, and the VT then controls the presentation of those objects.
The VT is free to ignore any visual formatting attributes in the referenced objects. This capability allows
information from different manufacturers to have a consistent look and feel and interaction with the operator
when combined into the VT.

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 ISO 11783-6:2014(E)

Key
1 Window Mask (2 x 1) 4 Window Mask (1 x 2)
2 Window Mask (2 x 2) 5 Window Mask (1 x 3)
3 Window Mask (1 x 1)

Figure 22 — Window Mask objects - Example

If User-Layout Data Masks are supported, the VT shall provide a proprietary mapping mechanism to allow the
operator to select which Window Mask objects are placed in which Window Cells in each of the User-Layout
Data Masks. The VT shall prevent the operator from choosing a Window Mask object that does not fit in the
selected Window Cell(s). When a Window Cell is selected in the mapping screen by the operator, the VT shall
present the list of all Window Mask objects that can fit in the cell(s), provided the Window Mask object is
available (see options attribute in the Window Mask object). The VT shall store the operator selected layout of
each of the User-Layout Data Masks in non-volatile memory for recall on next power up. If the Working Set
that provided the Window Cell is not present, the Window Cell shall be blanked (i.e. filled with the background
colour).

If a Window Mask object’s options attribute indicates that the mask is not available, the VT shall blank (i.e. fill
with the background colour) the associated Window Cell so that the Window Mask is not visible. A change in
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

state of the availability option may occur at runtime.

If the VT is Version 4 or later but does not support User-Layout Data Masks, the Working Set may still include
these objects in the object pool transfer. The VT shall parse the Window Mask object and may then discard it.

The Window Mask object width shall be equal to the width of the Window Cell(s) that it occupies. The Window
Mask object height shall be equal to the height of the Window Cell(s) that it occupies.

NOTE: Working Set designs are encouraged to participate in the User-Layout Data Mask by uploading Window Mask
objects since this can be a feature requested by users.

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 ISO 11783-6:2014(E)

4.7.5 Window Cell Size and Borders

The size of a single Window Cell is based on the 2x6 grid in the User-Layout Data Mask. The size of each
Window Cell shall be rounded down. Therefore, the size of a Window Cell is defined as follows:

Window Cell Width = Data Mask Width / 2 (rounded down)

Window Cell Height = Data Mask Height / 6 (rounded down)

The VT may draw a border around each Window Mask object. Whether the borders or any particular part of
the borders are actually drawn or not, is proprietary to the VT design. Border drawing is recommended but
may be based on an operator choice. The border area shall occupy the outside 1 pixel around the entire
Window Mask object and shall be drawn inside the Window Mask object’s region. Working Set designs shall
be aware of this and therefore it is recommended that no child object be placed on or touching the border area
when the free form (type 0) window type is used. See Clause B.19.2 Window Mask Window Type. See Figure
23 for an example of the border.

EXAMPLE:

Key
1 Window Mask Region
2 1-pixel border drawn around inside perimeter of Window Mask

Figure 23 — Window Mask Border - Example

The VT shall clip any pixel in the Window Mask object (and its children) that falls outside the Window Mask
region.

4.7.6 Window Mask Scaling

Depending on the type of Window Mask, the VT and the Working Set shall cooperate in terms of scaling. If the
window type is type 0 (free form), then as with other objects in the object pool, scaling of the Window Mask
object and its children is solely the responsibility of the Working Set. Regardless of the resolution of the VT in
use, the aspect ratio is known since the User-Layout Data Mask always has a 2x6 grid and the Data Mask
area is always square. Object pool designers should design the Window Mask object to an appropriate aspect
ratio which makes the scaling easier.

EXAMPLE 1 If the object pool is designed for a default 200x200 Data Mask Area, using the equations in Clause
4.7.5, the size of each Window Cell would be:

Window Cell Width = 200 / 2 = 100 pixels

Window Cell Height = 200 / 6 = 33 pixels

EXAMPLE 2 Using the Window Cell sizes above when using a VT with a default 200x200 Data Mask Area, a 2x2
Window Mask would use:

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 ISO 11783-6:2014(E)

Window Mask Width = 100 x 2 = 200 pixels

Window Mask Height = 33 x 2 = 66 pixels

The VT controls most of the layout, formatting and scaling of objects when the Window Mask type is not the
Free Form Window (0). The exception to this rule is the Window Icon and Button attributes that are pre-scaled
by the Working Set. The VT may further scale the Window Icon and Buttons if necessary. More information is
contained in the sections that describe the window types greater than type zero (See Clause B.19.2 Window
Mask Window Type).

4.7.7 Using Window Masks Outside of User-Layout Data Masks

The VT may optionally use Window Mask objects in Non-VT Screens and Non-VT Areas, if supported by the
manufacturer’s design (see Figure 20). Soft Keys may or may not be supported when used in non-VT screens
and non-VT areas. Working Sets shall be aware that Window Mask object may be used outside of User-
Layout Data Mask and therefore shall monitor the VT On User-Layout Hide/Show message and refresh
Window Mask objects and keys that are visible regardless of the source address specified in the VT Status
message.

4.7.8 User-Layout Soft Key Mask

If the VT supports User-Layout Data Masks, it shall also support one and only one User-Layout Soft Key Mask
per User-Layout Data Mask. User-Layout Soft Key Masks are special Soft Key Mask objects that are owned
by the VT. Each User-Layout Soft Key Mask is divided into Key Cells (one cell per physical key if Physical Soft
Keys are used). The number of Key Cells supported by the User-Layout Data Mask is proprietary to the VT
design. Each Key Cell is sized to a normal Soft Key designator. The User-Layout Soft Key Mask is divided into
Key Cells as shown in Figure 24.

The VT designer shall decide how many keys per User-Layout Soft Key Mask are supported up to a maximum
of 64. If the number of keys supported exceeds the number of physical Soft Keys, the VT shall provide a
paging mechanism (identical to the Soft Key Mask object) to allow for proper mapping and operation.

Key
1 Key Cells (same size as Soft Key designator)
2 User-Layout Soft Key Mask

Figure 24 — Key Cell layout - Examples

56
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 ISO 11783-6:2014(E)

4.7.9 Key Group Objects

Key Group objects (see Clause B.20), optionally supplied in the object pools of Working Sets, are placed into
a User-Layout Soft Key Mask by the operator of the VT. A Key Group object may contain one to four Key
objects (although one is typical) and therefore may occupy one or more Key Cells. If User-Layout Data Masks
and User-Layout Soft Key Masks are supported, the VT shall provide a proprietary mapping mechanism to
allow the operator to select which Key Group objects are placed in which Key Cells in each of the User-Layout
Soft Key Masks. When Key Cell(s) are selected in the mapping screen by the operator, the VT shall present
the list of all Key Group objects from all Working Sets that provide them, provided the Key Group is available
(see options attribute in the Key Group object). The VT shall store the operator selected layout of each of the
User-Layout Soft Key Masks, in non-volatile memory, for recall on the next power up. If the Working Set that
provided the Key Group Objects is not present, the assigned Key Cell(s) shall be blanked (i.e. filled with the
background colour).

If a Key Group object’s options attribute indicates that the Key Group is not available, the VT shall blank (i.e.
fill with the background colour) the associated Key Cells so that the Key objects are not visible and cannot be
activated by the operator. A change in state of the availability option may occur at runtime.

Working Set designers shall be aware that Keys may or may not be available and since the operator is in
control of what is mapped on each User-Layout Data Mask, Window Mask objects shall not depend on the
presence of a particular, or set of particular, Key Groups.

Key
1 Key Group containing 1 Key
2 Key Group containing 2 Keys
3 Key Group containing 3 Keys

Figure 25 — User-Layout Data Mask with 6 Key Cells - Example

Working Set designers should ensure that Keys can be recognized to be part of a specific Working Set (e.g.
displaying just a text string "STOP" on a Key might lead to confusion by the operator if a particular
configuration uses 3 "STOP" Keys in the same User-Layout Soft Key Mask). To create a consistent look and
feel, the key layout shown in Figure 26 — Key object in a Key Group indicating Working Set - Example is
recommended.
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 ISO 11783-6:2014(E)

Key
1 Implement identifier (sized to 60% of the height of a standard Soft Key designator (rounded down) and width equal to
height) and anchored in the bottom left corner of the designator area.
2 Key object in a Key Group is the size of a Soft Key designator (uses all remaining pixels in the standard designator
area)

Figure 26 — Key object in a Key Group indicating Working Set - Example

4.7.10 Key Cell Size and Borders

The same drawing rules that apply to Soft Key Mask objects also apply to User-Layout Soft Key Mask objects.
A Key Cell size is the same size as a normal Soft Key designator.

4.7.11 Key Group Scaling

Similar to other objects in the Object Pool, scaling of the Key Group object’s children is the responsibility of
the Working Set.

4.7.12 Using Key Group Objects outside of User-Layout Soft Key Masks

The VT may optionally use Key Group objects outside of User-Layout Soft Key Mask, if supported by the
manufacturer’s VT display design. Working Sets shall be aware that Key Group objects can be used outside
of User-Layout Soft Key Mask and therefore shall monitor the VT On User-Layout Hide/Show message and
refresh keys that are visible regardless of the source address specified in the VT Status message.

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 ISO 11783-6:2014(E)

Key
1 3 Key Group Objects outside of User-Layout Soft Key Masks

Figure 27 — Key Group Objects outside of User-Layout Data Mask - Example

4.7.13 Operator Inputs

It is possible that input objects from several Working Sets can be on screen at the same time. The usual
navigation and data input rules apply with the following exceptions:

a) Select Input Object commands from any Working Set are not acted upon when a User-Layout Data Mask
is displayed because the VT is the owner of the Data Mask. In this case, the VT shall send a Select Input
Object response with an error indicated.

b) Navigation order is VT-proprietary.

c) Macros associated with input object events shall be executed but Working Set designers must be aware
that there may be no visible effect since the Working Set is not the active Working Set. For example,
objects acted upon or made visible by the macro may not be on screen and Change Active Mask
commands selecting a Data Mask will have no effect because the Working Set is not the active Working
Set.

d) When an input object in a Window Mask is activated by the operator, the VT becomes the active Working
Set in the VT Status message. If Working Set Data Mask(s) are also visible, the indicator of the active
Data Mask shall be removed since the VT is now the active Working Set. Whether or not an “active
working set” indicator is displayed around the Window Mask is proprietary to the VT design. The VT shall
also use the VT On user-Layout Hide/Show message to inform the Working Set about this change. See
4.6.8 Working Set object and active masks.

4.7.14 Refreshing On Screen Data

Whenever a Window Mask object or Key Group object is on screen, it shall be the responsibility of the
Working Set to refresh values and objects as required. If a Working Set times out, the connection
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management rules apply and the VT shall remove from the screen, any Window Mask objects and Key Group
objects that belong to the affected Working Set.

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In order to refresh on screen objects, the Working Sets need to be made aware of what Window Mask objects
and Key Group objects are visible. This is accomplished by the VT On User-Layout Hide/Show message (see
Clause H.20). This message shall be sent by the VT for each Window Mask and Key Group object that has
been displayed or removed from the display.

NOTE The VT Status message is not used to determine when to update Window Mask or Key Group objects.

4.7.15 Look and Feel

4.7.15.1 User-Layout Data Mask Look and Feel

When mixing Window Mask objects from several Working Sets, general look and feel can quickly become a
problem for the operator since objects may not line up vertically and horizontally and may use different colour
schemes and fonts. Therefore restrictions are required for the design of the windows represented by the
Window Mask objects and their children. In addition, the VT controls the look and feel on its User-Layout Data
Masks. The strategy is that the Working Set supplies the superset of attributes that the VT may need to render
the Window Mask objects but the VT decides what is displayed and where it is displayed in the Window Mask
object assuming the window type is greater than zero. The following rules and guidelines shall apply:

a) When the Window Type is not the Free Form Window, the VT determines the background color and
transparency of the window. If required the Working Set designer can query the VT’s background
colour with the Get Window Mask Data message.

b) Window contents should be designed as described in the following clauses.

c) The VT may ignore any visual formatting attributes in the Working Set’s supplied object references
where the Window Type is not the Free Form Window.

4.7.15.2 Window Title and Window Title Font Attributes

The VT may optionally use this string for a title inside the Window Mask. Formatting is proprietary to the VT
designer. The VT shall always display either or both of the Window Title and Window Icon as these elements
are considered to be functionally equivalent and describe the contents of this window.
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4.7.15.3 Window Icon size and shape

The VT may optionally use the Window Icon attribute inside the Window Mask. The Window Icon attribute in
the Window Mask object shall reference a Picture Graphic object. Positioning is proprietary to the VT
designer, subject to the rules below. The Window Icon Area shall be square and shall be 90% of the height of
a single Window Cell, rounded down.

EXAMPLE In a 200x200 Data Mask Area, the Window Cell size is 100 pixels wide by 33 pixels high. The standard
Window Icon Area is then:

Icon Height = 33 x 0.90 = 29 pixels

Icon Width = Icon Height = 29 pixels

This provides for room for a window border and some white space outside the Window Icon Area. Using the
above information, Working Set designers may pre-scale the Window Mask Icon Picture Graphic object at
design time or set the scale, via the width attribute, at run-time. It is permissible for the Working Set to supply
an icon that is smaller or larger than the Window Icon Area. It is also permissible to provide an icon in an
aspect ratio different from the square aspect ratio of the Window Icon Area. The VT may position the icon as
desired if the icon dimension (X or Y) is smaller than the Window Icon Area. The VT shall center and clip the
icon if the icon dimension (X or Y) is larger than the Window Icon Area. These rules apply independently to
the X and Y dimensions.

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 ISO 11783-6:2014(E)

Working Set designers should supply an icon that clearly represents not only the specific function being
displayed but also a representation of the Working Set so that the source of the data is evident to the
operator.

4.7.15.4 Formatting

For window types greater than zero, the VT look and feel design shall ensure that at least the minimum
number of characters are displayed for numeric and string value fields and shall obey the numeric scaling and
numeric formatting attributes supplied by the Working Set. Specifically, this includes the options (bits 1, 2 and
3), variable reference, value, offset, scale, number of decimals and format attributes. Look and feel attributes
such as justification, colour and other formatting attributes may be ignored by the VT to achieve its desired
look and feel. More information on field lengths is given in the section on Window Mask Window Type (See
Clause B.19.2).

4.7.16 Uploading New Window Mask and Key Group objects

Uploading completely new objects (as long as the object type does not change) at run-time is permitted by
Annex C of this standard. In terms of Window Mask and Key Group objects, there are several cases that shall
be considered and managed properly by the VT design as identified in Table 6 — VT Behavior When New
Window Mask or Key Group Object is Uploaded.
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 ISO 11783-6:2014(E)

Table 6 — VT Behavior When New Window Mask or Key Group Object is Uploaded

Event VT Behavior
A new Window Mask or Window Mask child is uploaded If the object is visible, the VT shall refresh it.
that creates a simple change in appearance (background
colour, option change, child change etc.).
A new Window Mask is uploaded that changes its If the object is visible, the VT shall blank (i.e. fill with the
availability from available to not available background colour) the area occupied by the object so
that is it removed from the screen.
A new Window Mask is uploaded that changes its size If the size decreases and the Window Mask is visible, the
VT shall refresh the object and all window cells that it
originally occupied. It shall also blank (i.e. fill with the
background colour), all window cells that are no longer
used by this object. The VT shall adjust the stored
mapping to reflect the new unused window cells.
If the size increases, the VT shall determine if the object
still fits on screen in its current position in the grid and
whether or not empty window cells are available in the
extended positions to accommodate the new object. If
yes, the VT shall refresh the object and adjust the stored
mapping (for occupied window cells). If no, the VT shall
automatically remove the window from the stored
mapping and, if visible, shall blank (i.e. fill with the
background colour) the window cells that it originally
occupied.
A new Window Mask is uploaded that changes its If the object is visible, the VT shall refresh it.
window type
A new Key Group object is uploaded that creates a If the object is visible, the VT shall refresh it.
simple change in appearance (option change, child
change etc.)
A new Key Group object is uploaded that changes its If the object is visible, the VT shall blank (i.e. fill with the
availability from available to not available background colour) the area occupied by the object so
that is it removed from the screen. The positions of other
mapped Key Group objects shall not be effected.
A new Key Group object is uploaded that changes the If the number of keys in the group decreases, and the
number of keys in the group object is visible, the VT shall refresh the object and blank
(i.e. fill with the background colour) and key positions
that are no longer used. The VT shall adjust the stored
mapping to reflect the new unused key positions. The
positions of other mapped Key Group objects shall not
be effected.
If the number of keys in the group increases, the VT shall
determine if there are enough empty key positions on the
same page to accommodate the new object, without
changing the position of the Key Group object. If yes,
the VT shall extend the mapping of the object (for
occupied key positions) and refresh the Key Group
object if visible. If no, the VT shall automatically remove
the Key Group from the mapping and, if the object is
visible, shall blank (i.e. fill with the background colour)
the key positions that it originally occupied. The
positions of other mapped Key Group objects shall not
be effected.
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 ISO 11783-6:2014(E)

Annex A
(normative)

Object, event, colour and command codes

A.1 Object types

A.1.1 General

This part of ISO 11783 takes an object-oriented approach. The VT shall be capable of managing the set of
objects given in Table A.1 — Virtual terminal objects, which includes the requirement to parse the objects,
even if the object is not functionally supported. Each Working Set using the services of the VT defines an
object pool that is a collection of the objects given. Each object has a specific, well-defined behaviour and a
specific set of attributes.

Table A.1 — Virtual terminal objects

Object Type ID Description

Top level objects

Working Set object 010 Top level object that describes an implement’s ECU or group of ECUs
(Working Set). Each Working Set is required to define one, and only one,
Working Set object.
Data Mask object 110 Top level object that contains other objects. A Data Mask is activated by a
Working Set to become the active set of objects on the VT display.
Alarm Mask object 210 Top level object that contains other objects. Describes an alarm display.
Container object 310 Used to group objects.
e
Window Mask object 3410 Top level object that contains other objects. The Window Mask is activated
by the VT.

Key objects

Soft Key Mask object 410 Top level object that contains Key objects.
Key object 510 Used to describe a Soft Key.
Button object 610 Used to describe a Button control.
e
Key Group object 3510 Top level object that contains Key objects.
Input field objects

Input Boolean object 710 Used to input a TRUE/FALSE type input.

810 Used to input a character string.

Input String object

Input Number object 910 Used to input an integer or float numeric.
Input List object 1010 Used to select an item from a pre-defined list.
Output field objects

Output String object 1110 Used to output a character string.

Output Number object 1210 Used to output an integer or float numeric.

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 ISO 11783-6:2014(E)

Object Type ID Description

a
Output List object 3710 Used to output a list item.
Output shape objects

Output Line object 1310 Used to output a line.

Output Rectangle object 1410 Used to output a rectangle or square.
Output Ellipse object 1510 Used to output an ellipse or circle.
Output Polygon object 1610 Used to output a polygon.
Output graphic objects

Output Meter object 1710 Used to output a meter.

Output Linear Bar Graph object 1810 Used to output a linear bar graph.
Output Arched Bar Graph object 1910 Used to output an arched bar graph.
e
Graphics Context object 3610 Used to output a graphics context.
f
Animation object 4410 The Animation object is used to display simple animations.
Picture graphic object

Picture Graphic object 2010 Used to output a picture graphic (bitmap).

Variable objects

Number Variable object 2110 Used to store a 32-bit unsigned integer value.
String Variable object 2210 Used to store a fixed length string value.
Attribute Objects

Font Attributes object 2310 Used to group font based attributes. Can only be referenced by other
objects.
Line Attributes object 2410 Used to group line based attributes. Can only be referenced by other
objects.
Fill Attributes object 2510 Used to group fill based attributes. Can only be referenced by other objects.
Input Attributes object 2610 Used to specify a list of valid characters. Can only be referenced by input
field objects.
a
Extended Input Attributes object 3810 Used to specify a list of valid WideChars. Can only be referenced by Input
Field Objects.
e
Colour Map object 3910 Used to specify a colour table object.
a
Object Label Reference List object 4010 Used to specify an object label.
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Pointer object

Object Pointer object 2710 Used to reference another object.

f
External Object Definition object 4110 Used to list the objects that may be referenced from another Working Set
f
External Reference NAME object 4210 Used to identify the WS Master of a Working Set that can be referenced
f
External Object Pointer object 4310 Used to reference an object in another Working Set
Macro object

Macro object 2810 Special object that contains a list of commands that can be executed in
response to an event. Macros can be referenced by other objects.
Version 4 and later Working Sets may use the Execute Macro command.
Version 5 and later works Sets may use the Execute Extended Macro
command.

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 ISO 11783-6:2014(E)

Object Type ID Description

Auxiliary control

Auxiliary Function Type 1 object 2910 The Auxiliary Function Type 1 object defines the designator and function
c
(ignored) type for an Auxiliary Function. The object is used strictly in the Auxiliary
Control screen which is proprietary to the VT.
Auxiliary Input Type 1 object 3010 The Auxiliary Input Type 1 object defines the designator, key number, and
c
(ignored) function type for an auxiliary input. The object is used strictly in the Auxiliary
Control screen which is proprietary to the VT.
b
Auxiliary Function Type 2 object 3110 The Auxiliary Function Type 2 object defines the designator and function
type for an Auxiliary Function.
b
Auxiliary Input Type 2 object 3210 The Auxiliary Input Type 2 object defines the designator, key number, and
function type for an Auxiliary Input.
Auxiliary Control Designator Type 2 3310 Used to reference Auxiliary Input Type 2 object or Auxiliary Function Type 2
b
Object Pointer object.
Proprietary Objects
d
Manufacturer Defined Objects 24010 - Manufacturer defined objects should not be sent to any other Vendors VT.
25410 (See Clause 4.6.24 Proprietary Means)
Reserved Objects

Reserved 4510 - Reserved for future use.

23910

Reserved 25510 Reserved for future use. (See Clause D.14 Get Supported Objects
message)
a
Version 4 and later VTs support these objects.

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b
Version 3 and later VTs support these objects.
c
Version 3 and later VTs parse these objects for compatibility, but they are not functionally supported.
d
Version 4 and later VTs support proprietary objects that should not be used between ECUs and VTs with different
manufacturer codes.
e
Version 4 and later VTs parse these objects for compatibility because they are optional and may not be functionally
supported. (See Clause D.14 Get Supported Objects message)
f
Version 5 and later VTs support these objects.

A.1.2 Nomenclature

The following data types and nomenclature are used in the object definitions in Annex B.

[] When surrounding an AID number this indicates that it is a read-only attribute and is
accessible with the Get Attribute Value message. AIDs that are explicitly defined without
square brackets are writable with the Change Attribute command.

Array A sequence of 1 byte unsigned integer values of a defined length.

Bitmask A set of logical bit values. Size is 1 byte. Bitmasks always have Bit 0 defined as the least
significant bit. (See Figure A.1 — Bit positions in a bitmask)

Boolean Logical TRUE (1) or FALSE (0). Size is 1 byte.

Byte Signed or unsigned integer numeric value with a size of exactly 1 byte.

Float IEEE 754-1985 standard 32-bit floating point numeric value. Size is 4 bytes.

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 ISO 11783-6:2014(E)

Integer Signed or unsigned integer numeric value. Possible sizes are 1, 2 or 4 bytes.

String Zero or more characters composed of either the primitive type “Char“ or the primitive type
WideChar. String length is variable.

Length The size of an object, always expressed as a count of the Bytes required to hold the object.

Key
1 most significant
2 least significant

Figure A.1 — Bit positions in a bitmask

A.1.3 Object relationships

The visible objects of an object pool are arranged in a hierarchy, where parent objects contain child objects.

Some of the child objects can also contain objects, and then they can become parent objects to their own
child-objects. Table A.2 — Allowed hierarchical relationships of objects shows the containment rules of
objects within the object pool hierarchy.

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 ISO 11783-6:2014(E)

Table A.2 — Allowed hierarchical relationships of objects

Parent Object

Object Label graphic representation

Object Label Reference List object

Auxiliary Function Type 1 object

Auxiliary Function Type 2 object

Auxiliary Input Type 1 object

Auxiliary Input Type 2 object

Soft Key Mask object
Window Mask object
Working Set object

Alarm Mask object

Output List object

Key Group object
Data Mask object

Animation object
Container object

Input List object

Button object
Key object
Working Set object 3 3 3 4 4 4 4 4 4
Data Mask object 4
Alarm Mask object 4
Container object 4 2 2 2 4 2 2 4 4 3 3 4 4 5
Window Mask object 4
Soft Key Mask object 4
Key object 2 4 4
Button object 2 2 4 4 4
Key Group object 4
Input Boolean object 2 2 4 4 4
2 2 4 4 4
Input String object
Input Number object 2 2 4 4 4
Input List object 2 2 4 4 4
Output String object 2 2 2 2 4 2 2 2 4 2 2 3 3 4 4 5
Child Objects

Output Number object 2 2 2 2 4 2 2 2 4 2 2 3 3 4 4 5

Output List object 4 4 4 4 4 4 4 4 4 4 4 4 4 5
Output Line object 2 2 2 2 4 2 2 4 4 2 2 3 3 4 4 5
Output Rectangle object 2 2 2 2 4 2 2 4 4 2 2 3 3 4 4 5
Output Ellipse object 2 2 2 2 4 2 2 4 4 2 2 3 3 4 4 5
Output Polygon object 2 2 2 2 4 2 2 4 4 2 2 3 3 4 4 5
Output Meter object 4 2 2 2 4 4 4 4 4 3 3 4 4 5
Output Linear Bar Graph object 4 2 2 2 4 4 4 4 4 3 3 4 4 5
Output Arched Bar Graph 4 2 2 2 4 4 4 4 4 3 3 4 4 5
object
Graphics Context object 4 4 4 4 4 4 4 4 4 4 4 4 4 5
Animation object 5 5 5 5 5 5 5 5
Picture Graphic object 2 2 2 2 4 2 2 2 4 2 2 3 3 4 4 5
Number Variable object 5
String Variable object 5
Font Attributes object 5
Line Attributes object 5
Fill Attributes object 5
Input Attributes object 5

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 ISO 11783-6:2014(E)

Parent Object

Object Label graphic representation

Object Label Reference List object

Auxiliary Function Type 1 object

Auxiliary Function Type 2 object

Auxiliary Input Type 1 object

Auxiliary Input Type 2 object

Soft Key Mask object
Window Mask object
Working Set object

Alarm Mask object

Output List object

Key Group object
Data Mask object

Animation object
Container object

Input List object

Button object
Key object
Extended Input Attributes 5
object
Colour Map object 5
Object Label Reference List 5
object
Object Pointer object 4 2 2 2 4 2 2 2 4 4 4 3 3 4 5 5
External Object Definition 5
object
External Reference NAME 5
object
External Object Pointer object 5 5 5 5 5 5 5 5 5 5 5
Macro object 5
Auxiliary Function Type 1 5
object
Auxiliary Input Type 1 object 5
Auxiliary Function Type 2 3 3 3 4
object
Auxiliary Input Type 2 object 3 3 3 4
Auxiliary Control Designator 3 3 3 4 4 5
Type 2 Object Pointer

NOTE: The numbers in the table above denote Child Objects that can be contained within a Parent Object in the indicated
VT version including later versions.

NOTE: Containment rules of the parent override containment rules of the child

NOTE: Object pointed to by Object Pointer cannot violate the containment rules of the parent hierarchy

A.2 Event types

Table A.3 — Event summary presents the events defined by this part of ISO 11783. An event ID is assigned
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to each so that events can be uniquely associated with a Macro object to execute when the event occurs. VT
behaviour specific to each object is defined in event tables given with each object.

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 ISO 11783-6:2014(E)

Table A.3 — Event summary

Event ID
Event name 8-bit Macro or Event occurs when:
c
16-bit Macro

Reserved 010 Reserved

On activate 110 Working Set is made active.
On deactivate 210 Working Set is made inactive.
On show 310 For Container objects, triggered by the hide/show command, with “show”
indicated; for mask objects, when the mask is made visible on the display.
On hide 410 For Container objects, triggered by the hide/show command, with “hide” indicated;
for mask objects, when the mask is removed from the display.
On refresh N/A An object that is already on display is redrawn (Macros cannot be associated with
this event so no event ID is defined).
On enable 510 Input object is enabled (only enabled input objects can be navigated to). An
Animation object is enabled for animation.
On disable 610 Input object is disabled (only enabled input objects can be navigated to). An
Animation object is disabled for animation.
On Change Active 710 Change Active Mask command.
Mask
On Change Soft 810 Change Soft Key Mask command.
Key Mask
On Change 910 Change Attribute command.
Attribute
On Change 1010 Change Background Colour command.
Background Colour
On Change Font 1110 Change Font Attributes command.
Attributes
On Change Line 1210 Change Line Attributes command.
Attributes
On Change Fill 1310 Change Fill Attributes command.
Attributes
On Change Child 1410 Change Child Location command.
Location
On Change Size 1510 Change Size command.
On Change Value 1610 Change Numeric Value command or Change String Value command.
On Change Priority 1710 Change Priority command.
On Change End 1810 Change End Point command.
Point
On Input Field 1910 The input field or Button has received focus, operator has navigated onto the input
Selection field or Button or the VT has received the Select Input Object command.
On Input Field 2010 The input field or Button has lost focus, operator has navigated off of the input field
Deselection or Button or the VT has received the Select Input Object command.
On ESC 2110 Input aborted on an input field either by the operator or the Working Set.
On entry of a value 2210 a Operator completes entry by activating the ENTER means — value does not have
to change.
On entry of a new 2310 a Operator completes entry by activating the ENTER means — value has changed.
value
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 ISO 11783-6:2014(E)

Event ID
Event name 8-bit Macro or Event occurs when:
c
16-bit Macro

On key press 2410 A Soft Key or Button is pressed.

On key release 2510 A Soft Key or Button is released.
On Change Child 2610 Change Child Position command.
Position
c
On pointing event 2710 Operator touches/clicks an area that causes a pointing event
press
c
On pointing event 2810 Operator touch/click is released
release
b
Reserved 2710 - 23910 Reserved
c
2910 – 23910
b
Proprietary Events 24010 - 25410 Proprietary events should not be used between ECUs and VTs with different
manufacturer codes.
b
Reserved 25510 Reserved

c
Use Extended 25510 This is not an event. When value is found in the event list of an object, it indicates
Macro Reference that a 16-bit Macro Object ID reference is used (See Clause 4.6.22.3 Macro
references – VT version 5 and later)
a If two or more input objects reference the same variable object and one of the input objects is modified (thereby changing the value of
the variable object), the OnEntryOfANewValue and/or OnEntryOfAValue Macros are executed for the modified input object only.
b VT version 4 and prior
c VT version 5 and later

A.3 VT standard colour palette

The VT Standard colour palette is shown in Table A.4 — Standard VT RGB colour palette. The active Colour
Map can be altered. (See Clause F.60 Select Colour Map)

Table A.4 — Standard VT RGB colour palette

Index R,G,B value Index R,G,B value Index R,G,B value Index R,G,B value

0 (Black) 00,00,00a, b 64 33,66,00 128 99,00,CC 192 CC,FF,66

1 (White) FF,FF,FF a, b 65 33,66,33 129 99,00,FF 193 CC,FF,99

2 (Green) 00,99,00b 66 33,66,66 130 99,33,00 194 CC,FF,CC

3 (Teal) 00,99,99b 67 33,66,99 131 99,33,33 195 CC,FF,FF

4 (Maroon) 99,00,00b 68 33,66,CC 132 99,33,66 196 FF,00,00

5 (Purple) 99,00,99b 69 33,66,FF 133 99,33,99 197 FF,00,33

6 (Olive) 99,99,00b 70 33,99,00 134 99,33,CC 198 FF,00,66

7 (Silver) CC,CC,CCb 71 33,99,33 135 99,33,FF 199 FF,00,99

8 (Grey) 99,99,99b 72 33,99,66 136 99,66,00 200 FF,00,CC

9 (Blue) 00,00,FFb 73 33,99,99 137 99,66,33 201 FF,00,FF

10 (Lime) 00,FF,00b 74 33,99,CC 138 99,66,66 202 FF,33,00

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 ISO 11783-6:2014(E)

Index R,G,B value Index R,G,B value Index R,G,B value Index R,G,B value

11 (Cyan) 00,FF,FFb 75 33,99,FF 139 99,66,99 203 FF,33,33

12 (Red) FF,00,00b 76 33,CC,00 140 99,66,CC 204 FF,33,66

13 (Magenta) FF,00,FFb 77 33,CC,33 141 99,66,FF 205 FF,33,99

14 (Yellow) FF,FF,00b 78 33,CC,66 142 99,99,00 206 FF,33,CC

15 (Navy) 00,00,99b 79 33,CC,99 143 99,99,33 207 FF,33,FF

16 00,00,00 80 33,CC,CC 144 99,99,66 208 FF,66,00

17 00,00,33 81 33,CC,FF 145 99,99,99 209 FF,66,33
18 00,00,66 82 33,FF,00 146 99,99,CC 210 FF,66,66
19 00,00,99 83 33,FF,33 147 99,99,FF 211 FF,66,99
20 00,00,CC 84 33,FF,66 148 99,CC,00 212 FF,66,CC
21 00,00,FF 85 33,FF,99 149 99,CC,33 213 FF,66,FF
22 00,33,00 86 33,FF,CC 150 99,CC,66 214 FF,99,00
23 00,33,33 87 33,FF,FF 151 99,CC,99 215 FF,99,33
24 00,33,66 88 66,00,00 152 99,CC,CC 216 FF,99,66
25 00,33,99 89 66,00,33 153 99,CC,FF 217 FF,99,99
26 00,33,CC 90 66,00,66 154 99,FF,00 218 FF,99,CC
27 00,33,FF 91 66,00,99 155 99,FF,33 219 FF,99,FF
28 00,66,00 92 66,00,CC 156 99,FF,66 220 FF,CC,00

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29 00,66,33 93 66,00,FF 157 99,FF,99 221 FF,CC,33
30 00,66,66 94 66,33,00 158 99,FF,CC 222 FF,CC,66
31 00,66,99 95 66,33,33 159 99,FF,FF 223 FF,CC,99
32 00,66,CC 96 66,33,66 160 CC,00,00 224 FF,CC,CC
33 00,66,FF 97 66,33,99 161 CC,00,33 225 FF,CC,FF
34 00,99,00 98 66,33,CC 162 CC,00,66 226 FF,FF,00
35 00,99,33 99 66,33,FF 163 CC,00,99 227 FF,FF,33
36 00,99,66 100 66,66,00 164 CC,00,CC 228 FF,FF,66
37 00,99,99 101 66,66,33 165 CC,00,FF 229 FF,FF,99
38 00,99,CC 102 66,66,66 166 CC,33,00 230 FF,FF,CC
39 00,99,FF 103 66,66,99 167 CC,33,33 231 FF,FF,FF
40 00,CC,00 104 66,66,CC 168 CC,33,66 232 Proprietary
41 00,CC,33 105 66,66,FF 169 CC,33,99 233 Proprietary
42 00,CC,66 106 66,99,00 170 CC,33,CC 234 Proprietary
43 00,CC,99 107 66,99,33 171 CC,33,FF 235 Proprietary
44 00,CC,CC 108 66,99,66 172 CC,66,00 236 Proprietary
45 00,CC,FF 109 66,99,99 173 CC,66,33 237 Proprietary
46 00,FF,00 110 66,99,CC 174 CC,66,66 238 Proprietary
47 00,FF,33 111 66,99,FF 175 CC,66,99 239 Proprietary
48 00,FF,66 112 66,CC,00 176 CC,66,CC 240 Proprietary

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 ISO 11783-6:2014(E)

Index R,G,B value Index R,G,B value Index R,G,B value Index R,G,B value

49 00,FF,99 113 66,CC,33 177 CC,66,FF 241 Proprietary

50 00,FF,CC 114 66,CC,66 178 CC,99,00 242 Proprietary
51 00,FF,FF 115 66,CC,99 179 CC,99,33 243 Proprietary
52 33,00,00 116 66,CC,CC 180 CC,99,66 244 Proprietary
53 33,00,33 117 66,CC,FF 181 CC,99,99 245 Proprietary
54 33,00,66 118 66,FF,00 182 CC,99,CC 246 Proprietary
55 33,00,99 119 66,FF,33 183 CC,99,FF 247 Proprietary
56 33,00,CC 120 66,FF,66 184 CC,CC,00 248 Proprietary
57 33,00,FF 121 66,FF,99 185 CC,CC,33 249 Proprietary

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
58 33,33,00 122 66,FF,CC 186 CC,CC,66 250 Proprietary
59 33,33,33 123 66,FF,FF 187 CC,CC,99 251 Proprietary
60 33,33,66 124 99,00,00 188 CC,CC,CC 252 Proprietary
61 33,33,99 125 99,00,33 189 CC,CC,FF 253 Proprietary
62 33,33,CC 126 99,00,66 190 CC,FF,00 254 Proprietary
63 33,33,FF 127 99,00,99 191 CC,FF,33 255 Proprietary
a Monochrome (0 and 1).
b 16-colour mode (0 to 15).

The VT colour palette is based on the standard 216 colour “web browser safe” palette used by Internet
browsers. Hexadecimal RGB values of 00, 33, 66, 99, CC and FF are used giving a 6 × 6 × 6 = 216 colour
cube. The colour palette is organized as follows. The first two colours at indices 0 and 1 are used in
monochrome mode. The first 16 colours are used in 16 colour mode. In order to reduce search time during
palette mapping on an object development tool, colours 16 to 231 are organized in sorted, ascending order.
Colours 232 to 255 are proprietary to the VT design to extend the colour palette. VT designers choosing a
grey-scale implementation can map the 16 or 256 colour modes to shades of grey.

NOTE 256 colour mode does not actually give 256 unique colours because the first 16 colours are repeated
elsewhere in the palette.

Colour and pixel values given in object attributes and bitmap data are an index into this palette table.

There are three defined colour modes. VT designs supporting higher modes shall also support lower modes,
as follows:

a) monochrome only (black and some other colour, usually white) (valid colour codes 0 to 1);

b) 16-colour mode (VT shall support 16 colour and monochrome) (valid colour codes 0 to 15);

c) 256-colour mode (VT shall support all colours of the palette) (valid colour codes 0 to 255).

A.4 Command/parameter code summary

Table A.5 — Command/parameter summary lists all defined messages with the corresponding function code.

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 ISO 11783-6:2014(E)

Table A.5 — Command/parameter summary

Allowed
Clause/ Function Function VT
Message Direction in
subclause (Decimal) (Hex) version C
Macro

C.2.3 Object pool transfer message ECU to VT 1710 1116 No 2

C.2.4 End of Object Pool message ECU to VT 1810 1216 No 2
C.2.5 End of Object Pool response VT to ECU 1810 1216 No 2
D.2 Get Memory message ECU to VT 19210 C016 No 2
D.3 Get Memory response VT to ECU 19210 C016 No 2
D.4 Get Number of Soft Keys message ECU to VT 19410 C216 No 2
D.5 Get Number of Soft Keys response VT to ECU 19410 C216 No 2
D.6 Get Text Font Data message ECU to VT 19510 C316 No 2
D.7 Get Text Font Data response VT to ECU 19510 C316 No 2
D.8 Get Hardware message ECU to VT 19910 C716 No 2
D.9 Get Hardware response VT to ECU 19910 C716 No 2
D.10 Get Supported Widechars message ECU to VT 19310 C116 No 4
D.11 Get Supported WideChars response VT to ECU 19310 C116 No 4
D.12 Get Window Mask Data message ECU to VT 19610 C416 No 4
D.13 Get Window Mask Data response VT to ECU 19610 C416 No 4
D.14 Get Supported Objects message ECU to VT 19710 C516 No 4
D.15 VT to ECU 19710 C516 No 4
Get Supported Objects response
E.2 Get Versions message ECU to VT 22310 DF16 No 2

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E.3 Get Versions response VT to ECU 22410 E016 No 2
E.4 Store Version command ECU to VT 20810 D016 No 2
E.5 Store Version response VT to ECU 20810 D016 No 2
E.6 Load Version command ECU to VT 20910 D116 No 2
E.7 Load Version response VT to ECU 20910 D116 No 2
E.8 Delete Version command ECU to VT 21010 D216 No 2
E.9 Delete Version response VT to ECU 21010 D216 No 2
E.10 Extended Get Versions message ECU to VT 21110 D316 No 5
E.11 Extended Get Versions response VT to ECU 21110 D316 No 5
E.12 Extended Store Version command ECU to VT 21210 D416 No 5
E.13 Extended Store Version response VT to ECU 21210 D416 No 5
E.14 Extended Load Version command ECU to VT 21310 D516 No 5
E.15 Extended Load Version response VT to ECU 21310 D516 No 5
E.16 Extended Delete Version command ECU to VT 21410 D616 No 5
E.17 Extended Delete Version response VT to ECU 21410 D616 No 5
F.2 Hide/Show Object command ECU to VT 16010 A016 Yes 2
F.3 Hide/Show Object response VT to ECU 16010 A016 No 2

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 ISO 11783-6:2014(E)

Allowed
Clause/ Function Function VT
Message Direction in
subclause (Decimal) (Hex) version C
Macro

F.4 Enable/Disable Object command ECU to VT 16110 A116 Yes 2

F.5 Enable/Disable Object response VT to ECU 16110 A116 No 2
F.6 Select Input Object command ECU to VT 16210 A216 Yes 2
F.7 Select Input Object response VT to ECU 16210 A216 No 2
F.8 ESC command ECU to VT 14610 9216 No 2
F.9 ESC response VT to ECU 14610 9216 No 2
F.10 Control Audio Signal command ECU to VT 16310 A316 Yes 2
F.11 Control Audio Signal response VT to ECU 16310 A316 No 2
F.12 Set Audio Volume command ECU to VT 16410 A416 Yes 2
F.13 Set Audio Volume response VT to ECU 16410 A416 No 2
F.14 Change Child Location command ECU to VT 16510 A516 Yes 2
F.15 Change Child Location response VT to ECU 16510 A516 No 2
F.16 Change Child Position command ECU to VT 18010 B416 Yes 2
F.17 Change Child Position response VT to ECU 18010 B416 No 2
F.18 Change Size command ECU to VT 16610 A616 Yes 2

F.19 Change Size response VT to ECU 16610 A616 No 2

F.20 Change Background Colour ECU to VT 16710 A716 Yes 2
command
F.21 Change Background Colour response VT to ECU 16710 A716 No 2
F.22 Change Numeric Value command ECU to VT 16810 A816 Yes 2
F.23 Change Numeric Value response VT to ECU 16810 A816 No 2
F.24 Change String Value command ECU to VT 17910 B316 Yes 2
F.25 Change String Value response VT to ECU 17910 B316 No 2
F.26 Change End Point command ECU to VT 16910 A916 Yes 2
F.27 Change End Point response VT to ECU 16910 A916 No 2
F.28 Change Font Attributes command ECU to VT 17010 AA16 Yes 2
F.29 Change Font Attributes response VT to ECU 17010 AA16 No 2
F.30 Change Line Attributes command ECU to VT 17110 AB16 Yes 2
F.31 Change Line Attributes response VT to ECU 17110 AB16 No 2
F.32 Change Fill Attributes command ECU to VT 17210 AC16 Yes 2
F.33 Change Fill Attributes response VT to ECU 17210 AC16 No 2
F.34 Change Active Mask command ECU to VT 17310 AD16 Yes 2
F.35 Change Active Mask response VT to ECU 17310 AD16 No 2
F.36 Change Soft Key Mask command ECU to VT 17410 AE16 Yes 2
F.37 Change Soft Key Mask response VT to ECU 17410 AE16 No 2
F.38 Change Attribute command ECU to VT 17510 AF16 Yes 2
F.39 Change Attribute response VT to ECU 17510 AF16 No 2

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 ISO 11783-6:2014(E)

Allowed
Clause/ Function Function VT
Message Direction in
subclause (Decimal) (Hex) version C
Macro

F.40 Change Priority command ECU to VT 17610 B016 Yes 2

F.41 Change Priority response VT to ECU 17610 B016 No 2
F.42 Change List Item command ECU to VT 17710 B116 Yes 2
F.43 Change List Item response VT to ECU 17710 B116 No 2
F.44 Delete Object Pool command ECU to VT 17810 B216 No 2
F.45 Delete Object Pool response VT to ECU 17810 B216 No 2
F.46 Lock/Unlock Mask command ECU to VT 18910 BD16 Yes 4
F.47 Lock/Unlock Mask response VT to ECU 18910 BD16 No 4
F.48 Execute Macro command ECU to VT 19010 BE16 Yes 4
F.49 Execute Macro response VT to ECU 19010 BE16 No 4
F.50 Change Object Label command ECU to VT 18110 B516 Yes 4
F.51 Change Object Label response VT to ECU 18110 B516 No 4
F.52 Change Polygon Point command ECU to VT 18210 B616 Yes 4
F.53 Change Polygon Point response VT to ECU 18210 B616 No 4
F.54 Change Polygon Scale command ECU to VT 18310 B716 Yes 4
F.55 Change Polygon Scale response VT to ECU 18310 B716 No 4
F.56 Graphics Context command ECU to VT 18410 B816 Yes 4
F.57 Graphics Context response VT to ECU 18410 B816 No 4
F.58 Get Attribute Value message ECU to VT 18510 B916 No 4
F.59 Get Attribute Value response VT to ECU 18510 B916 No 4
F.60 Select Colour Map command ECU to VT 18610 BA16 Yes 4
F.61 Select Colour Map response VT to ECU 18610 BA16 No 4
F.62 Identify VT message ECU to 18710 BB16 No 4
Global,
ECU to VT
F.63 Identify VT response VT to ECU 18710 BB16 No 4
F.64 Execute Extended Macro command ECU to VT 18810 BC16 Yes 5
F.65 Execute Extended Macro response VT to ECU 18810 BC16 No 5
F.66 Unsupported VT Function message ECU to VT 25310 FD16 No 5
F.67 VT Unsupported VT Function VT to ECU 25310 FD16 No 5
message
G.2 VT Status message VT to Global 25410 FE16 No 2
Address
G.3 Working Set Maintenance message ECU to VT 25510 FF16 No 2
H.2 Soft Key Activation message VT to ECU 010 0016 No 2
H.3 Soft Key Activation response ECU to VT 010 0016 No 2
H.4 Button Activation message VT to ECU 110 0116 No 2
H.5 Button Activation response ECU to VT 110 0116 No 2

© ISO 2014 – All rights reserved 75

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 ISO 11783-6:2014(E)

Allowed
Clause/ Function Function VT
Message Direction in
subclause (Decimal) (Hex) version C
Macro

H.6 Pointing Event message VT to ECU 210 0216 No 2

H.7 Pointing Event response ECU to VT 210 0216 No 2
H.8 VT Select Input Object message VT to ECU 310 0316 No 2
H.9 VT Select Input Object response ECU to VT 310 0316 No 2
H.10 VT ESC message VT to ECU 410 0416 No 2
H.11 VT ESC response ECU to VT 410 0416 No 2
H.12 VT Change Numeric Value message VT to ECU 510 0516 No 2
H.13 VT Change Numeric Value response ECU to VT 510 0516 No 2
H.14 VT Change Active Mask message VT to ECU 610 0616 No 2
H.15 VT Change Active Mask response ECU to VT 610 0616 No 2
H.16 VT Change Soft Key Mask message VT to ECU 710 0716 No 2
H.17 VT Change Soft Key Mask response ECU to VT 710 0716 No 2
H.18 VT Change String Value message VT to ECU 810 0816 No 2
H.19 VT Change String Value response ECU to VT 810 0816 No 2
H.20 VT On User-Layout Hide/Show VT to ECU 910 0916 No 4
message
H.21 VT On User-Layout Hide/Show ECU to VT 910 0916 No 4
response
H.22 VT Control Audio Signal Termination VT to ECU 1010 0A16 No 4
message
J.7.2 Auxiliary Assignment Type 1 VT to ECU 3210 2016 No 2
command
J.7.3 Auxiliary Assignment Type 1 ECU to VT 3210 2016 No 2
response
J.7.4 Auxiliary Input Type 1 status ECU to 3310 2116 No 2
Global
Address
J.7.5 Auxiliary Assignment Type 2 VT to ECU 3610 2416 No 3
command
J.7.6 Auxiliary Assignment Type 2 ECU to VT 3610 2416 No 3
response
J.7.7 Preferred Assignment command ECU to VT 3410 2216 No 3
J.7.8 Preferred Assignment response VT to ECU 3410 2216 No 3
J.7.9 Auxiliary Input Type 2 Status ECU to VT, 3810 2616 No 3
message ECU to
Global
Address
J.7.10 Auxiliary Input Type 2 Maintenance ECU to 3510 2316 No 3
message Global
Address
J.7.11 Auxiliary Input Status Type 2 Enable VT to ECU 3710 2516 No 3
command
J.7.12 Auxiliary Input Status Type 2 Enable ECU to VT 3710 2516 No 3

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 ISO 11783-6:2014(E)

Allowed
Clause/ Function Function VT
Message Direction in
subclause (Decimal) (Hex) version C
Macro
response
J.7.13 Auxiliary Capabilities request ECU to VT 3910 2716 No 5
J.7.14 Auxiliary Capabilities response VT to ECU 3910 2716 No 5
Special Functions
a
Reserved Any 1110 – 1610 0B16 – 1016
a
Reserved Any 1910 – 3110 1316 – 1F16
a
Reserved Any 4010 – 9510 2816 – 5F16
a
Reserved 12810 –
Any 8016 – 9116
14510
a
Reserved 14710 –
Any 9316 – 9F16
15910
a
Reserved Any 19110 BF16
a
Reserved Any 19810 C616
a
Reserved 20010 –
Any C816 – CF16
20710
a
Reserved 21110 –
Any D316 – DE16
22210
a
Reserved 22510 –
Any E116 – FC16
25210
b
Proprietary Command 9610 –
Any 6016 – 7F16
12710
a
Reserved for future use
b
Proprietary commands should not be used between ECUs and VT with different manufacturer codes.
C
Identifies the VT version at which the command was introduced, however some messages have been revised with later
versions.

© ISO 2014 – All rights reserved 77

--```,`,`,,``,,````,

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 ISO 11783-6:2014(E)

Annex B
(normative)

Object definitions

B.1 Working Set object

This object describes a Working Set. Each Working Set shall provide one, and only one, of this object in its
object pool. This object shall include one or more objects that fit inside a Soft Key designator for use as an
identification of the Working Set. The VT may optionally use the identifier in communication alarms, Auxiliary
Control setup, in Soft Keys and any other place where an identifier for the Working Set is required. Only the
VT can activate this object. When this object is activated, the associated Working Set “owns” the VT. (See
Table B.1 — Working Set events and Table B.2 — Working Set attributes and record format)

Allowed Commands:

⎯ Change Active Mask command;

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.1 — Working Set events

Event Caused by VT behaviour Message

On Activate Operator selection Deactivate event on current Working Set object. VT Status message
of this Working Set Show event on the active Data Mask of this
via the VT Working Set object (assuming no alarms).
On Deactivate Operator selection Hide event on active Data Mask of this Working VT Status message

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of a different Set.
Working Set via the
VT
On Change Change Active Change the active mask attribute. If this Working Change Active Mask response.
Active Mask Mask command Set is active, then perform a hide event on the VT Status message if the Active
current active mask and a show event on the Mask changed.
new active mask.

On Change Change If the Working Set designator is visible, fill area Change Background Colour
Background Background Colour with background colour and draw child objects in response
Colour command the order they are listed.
On Change Change Child If the Working Set designator is visible, draw Change Child Location response
Child Location Location command child object at current location in background
colour to erase it. Refresh Working Set
designator (to redraw child object or objects).
On Change Change Child If the Working Set designator is visible, draw Change Child Position response
Child Position Position command child object at current location in background

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 ISO 11783-6:2014(E)

colour to erase it. Refresh Working Set

designator (to redraw child object or objects).
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

Table B.2 — Working Set attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =0 3 Object Type = Working Set
Background [1] Integer 1 0-255 4 Background colour.
colour
Selectable [2] Boolean 1 0 or 1 5 0 = FALSE, 1 = TRUE. Indicates whether or not
this Working Set can be selected by the
operator (e.g. an alarm system that does not
have any Data Masks may not be selectable.)
Active mask [3] Integer 2 0-65534 6-7 The Object ID of the Data or Alarm Mask to
display whenever the Working Set is active (or
visible, in the case of a VT that supports
multiple Working Sets on screen
simultaneously).
If the selectable attribute value = 0, then this
attribute is ignored.
Number of Integer 1 1-255 8 The objects that follow are used as the Working
objects to Set identifier. Although the identifier may be
follow used anywhere, the set of objects shall fit inside
a Soft Key designator. The VT clips anything
located outside the area of a Soft Key
designator.
Number of Integer 1 0-255 9 Number of Macro references included even if
macros to zero. Each Macro reference consists of 2 bytes:
follow one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Number of Integer 1 0-255 10 The number of language codes to follow. Each
languages to two-letter code represents a language that the
follow Working Set can support.
Repeat: Integer 2 0-65534 11+ Object ID of an object contained in the
{Object ID} object*6 designator (See Clause A.1.3 Object
relationships)
List all objects before listing macros.
{X Location} Signed 2 -32768 13+ Relative X location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of a Soft Key designator).
{Y Location} Signed 2 -32768 15+ Relative Y location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+ 32767 of a Soft Key designator).
Repeat: Integer 1 0-255 11+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)

80 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

{Macro ID} Integer 1 0-255 12+ (No. 8-bit Macro Object ID reference: Macro ID of
objects the Macro to execute.
*6)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
Repeat: String 2 Record (List these after all objects and macros have
{Language Position been listed.)
Code} Depends Two-letter code of a supported language. For
on above language codes, See ISO 639, however all
combinations of a-z and A-Z shall be accepted
to guard against changes to ISO 639.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

B.2 Data Mask object

The Data Mask describes the objects that will appear in the Data Mask area of the physical display. The size
of the Data Mask is defined by the VT and accessible to the Working Set with the Get Hardware message.
(See Table B.3 — Data Mask events and Table B.4 — Data mask attributes and record format)

Allowed commands:

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Soft Key Mask command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.3 — Data Mask events

Event Caused by VT behaviour Message

On Show Both the Data Mask Fill area with background colour. Draw child VT Status message
and its Working Set objects in the order they are listed in the Data
becoming active Mask object. Show the associated Soft Key
Mask.
On Hide Either the active Hide associated Soft Key Mask of this Data
mask changed for Mask.
the Working Set or —
the Working Set
being deactivated
On Refresh Any action that Redraw objects in the Data Mask that have
causes a visible become corrupted.
change on a child, —
grandchild, object,
etc.
On Change Change If the Data Mask is visible, fill area with Change Background Colour
Background Background Colour background colour and draw child objects in the response

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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

Colour command order they are listed.
On Change Change Child Draw child object at current location in Change Child Location response
Child Location Location command background colour to erase it. Refresh Data
Mask (to redraw child object or objects).
On Change Change Child Draw child object at current location in Change Child Position response
Child Position Position command background colour to erase it. Refresh Data
Mask (to redraw child object or objects).
On Change Soft Change Soft Key If the Data Mask is visible, hide event on the Change Soft Key Mask response.
Key Mask Mask command current Soft Key Mask and a show event on the If this mask is visible, VT Status
new Soft Key Mask. message.
On Change Change Attribute See Change Background Colour command and Change Attribute response. If
Attribute command Change Soft Key Mask command behaviour change affects visible masks, VT
above. Status message.
On Pointing Operator touches Pointing Event message
—
Event press data mask
On Pointing Operator touch is Pointing Event message
—
Event release released
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Table B.4 — Data mask attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =1 3 Object Type = Data mask
Background 1 Integer 1 0-255 4 Background colour.
colour
Soft Key Mask 2 Integer 2 0-65534, 5-6 Object ID of a Soft Key Mask associated with
65535 this Data Mask. Whenever this Data Mask is
displayed, the associated Soft Key Mask is also
displayed. If the NULL Object ID is used, there
are no Soft Keys associated with this Data
Mask and the Soft Key designators should be
cleared.
Number of Integer 1 0-255 7 Number of objects to follow even if zero. Each
objects to follow of these objects is “contained” in this Data
Mask. Each object consists of 6 bytes: two (2)
for Object ID and four (4) for location.
Number of Integer 1 0-255 8 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 9+ Object ID of an object contained in this mask
{Object ID} object*6 (See Clause A.1.3 Object relationships). List all
objects before listing macros.
{X Location} Signed 2 -32768 11+ Relative X location of the top left corner of the
integer to object*6 object (relative to the top left corner of the Data

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
+32767 Mask).
{Y Location} Signed 2 -32768 13+ Relative Y location of the top left corner of the
integer to object*6 object (relative to the top left corner of the Data
+32767 Mask).
Repeat: Integer 1 0-255 9+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 10+ (No. 8-bit Macro Object ID reference: Macro ID of the
objects Macro to execute.
*6)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.3 Alarm Mask object

For information on Alarm Mask behaviour, See Clause 4.6.14 Alarm handling. See Table B.5 — Alarm Mask
events and Table B.6 — Alarm Mask attributes and record format.

Allowed commands:

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Priority command;

⎯ Change Soft Key Mask command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.5 — Alarm Mask events

Event Caused by VT behaviour Message

On Show Both the Alarm Fill area with background colour. Draw child VT Status message
Mask and its objects in the order they are listed in the Alarm
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Working Set Mask object. Show the associated Soft Key

become active. Mask.
On Hide Either the active Hide associated Soft Key Mask of this Alarm
mask is changed for Mask.
—
the Working Set or
the Working Set is

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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

deactivated.
On Refresh Any action that Redraw objects in the Alarm Mask that have
causes a show or become corrupted.
hide on a child, —
grandchild etc
object.
On Change Change If the Alarm Mask is visible, fill area with Change Background Colour
Background Background Colour background colour and draw child objects in the response
Colour command order they are listed.
On Change Change Child Draw child object at current location in Change Child Location response
Child Location Location command background colour to erase it. Refresh Alarm
Mask (to redraw child object or objects).
On Change Change Child Draw child object at current location in Change Child Position response
Child Position Position command background colour to erase it. Refresh Alarm
Mask (to redraw child object or objects).
On Change Change Priority If this is the current mask in this Working Set Change Priority response
Priority command then reevaluate alarm priorities as follows
a) If this Alarm Mask is visible and it is no
longer the highest priority alarm then deactivate
this Working Set and activate the WS with the
highest priority alarm

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
b) If this Alarm Mask is not visible and it
becomes the highest priority alarm then
deactivate the current Working Set and activate
this WS.
On Change Soft Change Soft Key If the Alarm Mask is visible, hide event on the Change Soft Key Mask response.
Key Mask Mask command current Soft Key Mask and a show event on the If this mask is visible, VT Status
new Soft Key Mask. message.
On Change Change Attribute For behaviour see other change commands Change Attribute response. If
Attribute command above. change affects visible masks, VT
Status message.
On Pointing Operator touch data Pointing Event message
—
Event press mask
On Pointing Operator touch is Pointing Event message
—
Event release released

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 ISO 11783-6:2014(E)

Table B.6 — Alarm Mask attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =2 3 Object Type = Alarm Mask
Background 1 Integer 1 0-255 4 Background colour.
colour
Soft Key Mask 2 Integer 2 0-65534, 5-6 Object ID of a Soft Key Mask associated with
65535 this Alarm Mask. Whenever this Alarm Mask is
displayed, the associated Soft Key Mask is also
displayed. If the NULL is used, there are no
Soft Keys associated with this Alarm Mask and
the Soft Key designators should be cleared.
Priority 3 Integer 1 0-2 7 Priority of this alarm as follows:
0 = High, operator is in danger or urgent
machine malfunction
1 = Medium, normal alarm, machine is
malfunctioning
2 = Low, information only
Acoustic signal 4 Integer 1 0-3 8 Acoustic signal. 0 = highest priority,
1 = medium priority, 2 = lowest priority,
3 = none (silent).
Number of Integer 1 0-255 9 Number of objects to follow even if zero. Each
objects to of these objects is “contained” in this Alarm
follow Mask. Each object consists of 6 bytes: two (2)
for Object ID and four (4) for location.
Number of Integer 1 0-255 10 Number of Macro references included even if
macros to zero. Each Macro reference consists of 2 bytes:
follow one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 11+ Object ID of an object contained in this mask
{Object ID} object*6 (See Clause A.1.3 Object relationships). List all
objects before listing macros.
{X Location} Signed 2 -32768 13+ Relative X location of the top left corner of the
integer to object*6 object (relative to the top left corner of the
+32767 Alarm Mask).
{Y Location} Signed 2 -32768 15+ Relative Y location of the top left corner of the
integer to object*6 object (relative to the top left corner of the
+32767 Alarm Mask).
Repeat: Integer 1 0-255 11+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 12+ (No. 8-bit Macro Object ID reference: Macro ID of
objects the Macro to execute.

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--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
85
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
*6)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.4 Container object

The Container object is used to group objects for the purpose of moving, hiding or sharing the group. A
container is not a visible object, only a logical grouping of other objects. Unlike masks, containers can be
hidden and shown at run-time under Working Set control. The Container object has defined size limits to
assist in determining when other objects are overlaid with the container. See Table B.7 — Container events
and Table B.8 — Container attributes and record format.

Allowed Commands:

⎯ Hide/Show Object command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.7 — Container events

Event Caused by VT behaviour Message

On Show Show command on Draw the contained objects in the order listed. Hide/Show Response but only if
this object. Refresh parent mask. triggered by Hide/Show command
On Hide Hide command on Redraw the object with the mask’s background Hide/Show Response but only if
this object. colour. Refresh parent mask. triggered by Hide/Show command
On Refresh Any action that Redraw objects in the container that have
causes a show or become corrupted. --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

hide on a child, —
grandchild etc
object.
On Change Change Child Draw child object at current location in Change Child Location response
Child Location Location command background colour to erase it. Refresh container
(to redraw child object or objects).
On Change Change Child Draw child object at current location in Change Child Position response
Child Position Position command background colour to erase it. Refresh container
(to redraw child object or objects).
On Change Size Change Size Draw child objects at current location in Change Size response
command background colour to erase them. Refresh
container (to redraw child object or objects).

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 ISO 11783-6:2014(E)

Table B.8 — Container attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =3 3 Object Type = Container
Width [1] Integer 2 0-65535 4-5 Maximum width of the container’s area in
pixels. Objects or portions of objects outside
the defined area are clipped.
Height [2] Integer 2 0-65535 6-7 Maximum height of the container’s area in
pixels. Objects or portions of objects outside
the defined area are clipped.
Hidden [3] Boolean 1 0 or 1 8 0 = FALSE, 1 = TRUE. Indicates whether or not
this container and its child objects are hidden
(not displayed). (TRUE = Hidden)
Number of Integer 1 0-255 9 Number of objects to follow even if zero. Each
objects to of these objects is “contained” in this object.
follow Each object consists of 6 bytes: two (2) for
Object ID and four (4) for location.
Number of Integer 1 0-255 10 Number of Macro references included even if
macros to zero. Each Macro reference consists of 2 bytes:
follow one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 11+ Object ID of an object contained in this
{Object ID} object*6 container (See Clause A.1.3 Object
relationships). List all objects before listing
macros.
{X Location} Signed 2 -32768 13+ Relative X location of the top left corner of the
integer to object*6 object (relative to the top left corner the
+32767 Container object).
{Y Location} Signed 2 -32768 15+ Relative Y location of the top left corner of the
integer to object*6 object (relative to the top left corner of the
+32767 Container object).
Repeat: Integer 1 0-255 11+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 12+ (No. 8-bit Macro Object ID reference: Macro ID of
objects the Macro to execute.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

*6)… 16-bit Macro Object ID reference (only for VT

version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)

B.5 Soft Key Mask object

The Soft Key Mask is a Container object that contains Key objects, Object Pointer objects, or External Object
Pointer objects. The pointer objects (see Clause 4.6.11.5, 4.6.11.6) can only resolve to a NULL object or a
Key object. Keys are assigned to physical Soft Keys in the order listed. It is allowable for a Soft Key Mask to
contain no Keys in order that all Soft Keys are effectively disabled when this mask is activated. See Table B.9
— Soft Key Mask events and Table B.10 — Soft Key Mask attributes and record format.

A common implementation, which was not clearly defined until VT version 4 and later, is that pointers to the
NULL Object ID reserve a Soft Key position (the remaining Soft Keys do not move up and the trailing Soft
Keys can be navigated to). Pointers to NULL that are at the end of the list of Soft Keys shall not be displayed.
They should not be considered for paging. The paging requirements may be dynamic at run-time based if
pointer values are changed to and from NULL. (See Clause 4.5.3.5 Navigation among Soft Keys)

Allowed Commands:

⎯ Change Background Colour command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.9 — Soft Key Mask events

Event Caused by VT behaviour Message

On Show Show parent Draw child objects in the order they are listed in
Alarm/Data Mask or the Soft Key Mask.
—
Change Soft Key
Mask command
On Hide Hide on parent
Alarm/Data Mask or
— —
Change Soft Key
Mask command
On Change Change If the Soft Key Mask is visible, fill area with Change Background Colour
Background Background Colour background colour and draw child objects in the response
Colour command order they are listed.
On Change Change Attribute For behaviour, see Change Background Colour Change Attribute response
Attribute command command.

Table B.10 — Soft Key Mask attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =4 3 Object Type = Soft Key Mask
Background 1 Integer 1 0-255 4 Background colour. The Key object has its own
colour background colour attribute that overrides this
attribute.
Number of Integer 1 0-255 5 Number of objects to follow even if zero. Each
objects to follow of these objects is “contained” in this Soft Key
Mask.

88 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Number of Integer 1 0-255 6 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 7+ Object ID of an object contained in this mask
{Object ID} object*2… (See Clause A.1.3 Object relationships).
Repeat: Integer 1 0-255 7+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*2)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 8+ (No. 8-bit Macro Object ID reference: Macro ID of the
objects Macro to execute.
*2)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.6 Key object

The Key object defines the designator and key code for a Soft Key. Any object located outside of a Soft Key
designator is clipped. See Table B.11 — Key events and Table B.12 — Key attributes and record format.

Allowed Commands:

⎯ Select Input Object command (VT version 4 and later);

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.11 — Key events

Event Caused by VT behaviour Message

On Key Press Operator pressing Soft Key Activation message
—
the Soft Key
On Key Release Operator releasing Soft Key Activation message
—
the Soft Key

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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

On Change Change If the key is visible, fill area with background Change Background Colour
Background Background Colour colour and draw child objects in the order they response
Colour command are listed.
On Change Change Child Draw child object at current location in Change Child Location response
Child Location Location command background colour to erase it. Refresh Key
Designator (to redraw child object or objects).
On Change Change Child Draw child object at current location in Change Child Position response
Child Position Position command background colour to erase it. Refresh Key
Designator (to redraw child object or objects).
On Change Change Attribute For behaviour see other change commands Change Attribute response
Attribute command above.
On Input Field Select Input Object The VT shall provide some way for the operator Select Input Object response or
Selection command or to recognize that the Key object is selected (has VT Select Input Object message
operator navigates focus).
to Key object
On Input Field Select Input Object — Select Input Object response or
De-selection command or VT Select Input Object
operator navigates
off Key object

Table B.12 — Key attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =5 3 Object type = key
Background 1 Integer 1 0-255 4 Background colour.
colour
Key code 2 Integer 1 1-255 5 Key code assigned by ECU. VT reports this
code in the Soft Key Activation message.
NOTE: Key code zero (0) is reserved for use for
the ACK means.
Number of Integer 1 0-255 6 Number of objects to follow even if zero. Each
objects to follow of these objects is “contained” in this object.
Each object consists of 6 bytes: two (2) for
object id and four (4) for location.
Number of Integer 1 0-255 7 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 8+ Object ID of an object contained in this key (See
{Object ID} object*6 Clause A.1.3 Object relationships). List all
objects before listing macros.
{X Location} Signed 2 – 32768 10+ Relative X location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+ 32767 of the Soft Key designator).

90 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
{Y Location} Signed 2 -32768 12+ Relative Y location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of the Soft Key designator).
Repeat: Integer 1 0-255 8+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 9+ (No. 8-bit Macro Object ID reference: Macro ID of the
objects Macro to execute.
*6)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.7 Button object

The Button object defines a button control. This object is intended mainly for VTs with touch screens or a
pointing method but shall be supported by all VTs. Alternatively, if a touch screen or a pointing method is not
supported, the VT shall provide a means for navigating to the Button object (or objects). (See Clause 4.6.17
Operator input). The Working Set can determine if the VT supports touch screen or pointing devices by using
a Get Hardware message. When the Button object is activated, the VT sends a Button Activation message to
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

the Working Set Master.

The VT shall indicate when a Button is selected (has focus), pressed or latched depending on the options
attribute.

The Button consists of the Button Area, the Button Face, and the Button Border.

⎯ The Button Area is the area which is defined by the Button object width and height attributes.

⎯ The Button Face is the area which contains the Background colour and into which the designer may
implement child objects. Child objects are clipped to the width and height of the Button Face (see
Figure B.1 — Button examples with border (Options – Bit 5 = FALSE)). The Button Face is 8 pixels
smaller (in both width and height) than the Button Area, unless the Options - No border bit is set to TRUE,
in which case the Button Face is extended to be equal to the Button Area.

⎯ The Button Border is the area which contains the border colour. Presentation of the border is VT
proprietary (see Figure B.1 — Button examples with border (Options – Bit 5 = FALSE)). As a result, the
position of the button face is VT proprietary. The Button Border may hidden by setting the Options –
Suppress border bit to TRUE. The Button Border may be eliminated by setting the Options – No border bit
to TRUE. See Table B.13 — Button events and Table B.14 — Button attributes and record format.

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 ISO 11783-6:2014(E)

Figure B.1 — Button examples with border (Options – Bit 5 = FALSE)

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Figure B.2 — Button examples no border (Options – Bit 5 = TRUE)

Allowed commands:

⎯ Enable/Disable Object command (VT version 4 and later);

⎯ Select Input Object command (VT version 4 and later);

⎯ Change Background Colour command;

⎯ Change Size command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.13 — Button events

Event Caused by VT behaviour Message

On Enable Enable/Disable Mark the Button object enabled. If displayed, Enable/Disable Object response

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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

command operator can navigate to it.
On Disable Enable/Disable Mark the Button object disabled. Even if Enable/Disable Object response
command displayed, the operator cannot select this object.
VT shall make it clear to the operator that the
Button object is disabled.
On Input Field Select Input Object The VT shall provide some way for the operator Select Input Object response or
Selection command or to recognize that the Button object is selected VT Select Input Object message
operator navigates (has focus).
to Button object
On input Field Select Input Object Select Input Object response or
De-selection command or — VT Select Input Object
operator navigates
off Button object or
as a result of a
disable event
On Key Press Operator activating — Button Activation
the Button
On Key Release Operator releasing — Button Activation
the Button
On Change Change If the Button is visible, fill area with background Change Background Colour
Background Background Colour colour and draw child objects in the order they response
Colour command are listed.
On Change Size Change Size Draw child objects at current location in Change Size response
command background colour to erase them. Refresh
parent mask.
On Change Change Child Draw child object at current location in Change Child Location response
Child Location Location command background colour to erase it. Refresh Button (to
redraw child object or objects).
On Change Change Child Draw child object at current location in Change Child Position response
Child Position Position command background colour to erase it. Refresh Button (to
redraw child object or objects).
On Change Change Attribute For behaviour, see other change commands Change Attribute response
Attribute command above.

Table B.14 — Button attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =6 3 Object Type = Button
Width 1 Integer 2 0-65535 4-5 Maximum width of the Button’s area in
pixels.
Height 2 Integer 2 0-65535 6-7 Maximum height of the Button’s area in
pixels.
Background 3 Integer 1 0-255 8 Background colour.
colour
Border colour 4 Integer 1 0-255 9 Border colour.
Key Code 5 Integer 1 0-255 10 Key code assigned by ECU. VT reports
this code in the Button Activation
message.

© ISO 2014 – All rights reserved 93

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
c a
Options 6 Bitmask 1 0,1,3 11 TRUE (1) or FALSE (0).
Bit 0 = If TRUE, the Button is “latchable”
b
0-63 and remains pressed until the next
activation. If FALSE, the Button is
momentary.
Bit 1 = Current Button state for latchable
Buttons. 0=released, 1=latched. This
attribute is ignored for momentary
Buttons.
Bit 2 = Suppress border. If FALSE, VT
draws the proprietary border. If TRUE, no
border is ever drawn (even when pressed
momentarily or latched) and the area
normally occupied by the border is always
b
transparent.
Bit 3 = Transparent Background. If
FALSE, the Button’s interior background
is filled using the background colour
attribute. If TRUE, the Button’s
background is always transparent and the
b
background colour attribute is not used.
Bit 4 = Disabled. If FALSE, the Button is
enabled and can be selected and
activated by the operator. If TRUE, the
Button is drawn disabled (method
proprietary to VT) and it cannot be
b
selected or activated by the operator.
Bit 5 = No border. If FALSE, the Button
Border area is used by the VT as
described in Bit 2. If TRUE, Bit 2 is
ignored therefore no border is ever drawn
(even when pressed momentarily or
latched) and the Button Face extends to
b
the full Button Area.
Bits 6-7 = reserved, set to 0
NOTE: By using a momentary Button, in
combination with bits 2, 3, and 5 and by
modifying the Button appearance in real
time, a Working Set can create “radio
button” type behaviour between several
Button objects.
Number of Integer 1 0-255 12 Number of objects to follow even if zero.
objects to follow Each of these objects is “contained” in this
object. Each object consists of 6 bytes:
two (2) for Object ID and four (4) for
location.
Number of Integer 1 0-255 13 Number of Macro references included
macros to follow even if zero. Each Macro reference
consists of 2 bytes: one for event ID and
one for Macro ID. Whenever the indicated
event occurs, the associated Macro is
executed.
VT version 5 and later: A reference to a
Macro with 16-bit Object ID shall count as

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
2 macro references within the context of
this attribute.
Repeat: Integer 2 0-65534 14+ Object ID of an object contained in this
{Object ID} object*6 Button (See Clause A.1.3 Object
relationships). List all objects before listing
macros.
{X Location} Signed 2 -32768 16+ Relative X location of the top left corner of
integer to object*6 the object in VT pixels (relative to the top
+32767 left inner corner of the Button). Objects or
portions of objects outside the inner
border are clipped.
{Y Location} Signed 2 -32768 18+ Relative Y location of the top left corner of
integer to object*6 the object in VT pixels (relative to the top
+32767 left inner corner of the Button). Objects or
portions of objects outside the inner
border are clipped.
Repeat: Integer 1 0-255 14+ (No. (List these after all objects have been
{Event ID} objects listed.)
*6)… 8-bit Macro Object ID reference: Event ID
of event type that causes this Macro to
execute.
16-bit Macro Object ID reference (only for
VT version 5 and later): Event ID of event
type that causes this Macro to execute or
0xFF (see Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 15+ (No. 8-bit Macro Object ID reference: Macro ID
objects of the Macro to execute.
*6)… 16-bit Macro Object ID reference (only for
VT version 5 and later): Low byte or high
byte of Macro ID of the Macro to execute
(see Clause 4.6.22.3)
a
VT version 3 and prior.
b
VT version 4 and later
c
This AID is present in VT version 4 and later.

B.8 Input field objects

B.8.1 General

There are four types of input field: Boolean, String, Number, and List. No border shall be drawn around any
input field by the VT.

Input Boolean,

Input String object, Input Number and Input List objects have similar relationships, commands and events and
they are listed here. The attributes for each object differ.

Input objects have three states:

a) hidden (not displayed)

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 ISO 11783-6:2014(E)

b) shown and enabled (displayed and able to accept input)

c) shown and disabled (displayed but not able to accept input)

Input field objects do not have a show/hide attribute. In order to hide an input field object, it can be contained
by a Container object or Object Pointer object. See Table B.15 — Input events to Table B.20 — Input List
attributes and record format.

Allowed Commands (See Clause B.8.5 for Input List object allowed commands):

⎯ Enable/Disable Object command;

⎯ Select Input Object command;

⎯ ESC command;

⎯ Change Background Colour command (excluding Input List object);

⎯ Change Numeric Value command (excluding

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

⎯ Input String object);

⎯ Change String Value command (

⎯ Input String object only);

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.15 — Input events

Event Caused by VT Behaviour Message

On Refresh See Data Mask Redraw this object.
refresh for caused —
by conditions
On Enable Enable/Disable Mark the input object enabled. If displayed, Enable/Disable Object Response
Object command operator can navigate to it.
On Disable Enable/Disable Mark the input object disabled. Even if displayed, Enable/Disable Object Response
Object command the operator cannot select this object for input.
VT shall make it clear to the operator that the
input field is disabled.
On Input Field Select Input Object The VT shall provide some way for the operator Select Input Object response or
Selection command or to recognize that the input field is selected (has VT Select Input Object message
operator navigates focus).
to input field
On Input Field Select Input Object Select Input Object response or
De-selection command or VT Select Input Object message
operator navigates —
off input field or as
a result of a disable

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 ISO 11783-6:2014(E)

Event Caused by VT Behaviour Message

event
On ESC Operator aborts If the input object is not enabled for real time VT ESC message or ESC
input using ESC editing, then revert the value of the object to the response
key or Working Set value before operator began the input . (See (See Clause 4.6.17 Operator
sends an ESC Clause 4.2, data input, real time editing) input)
command Redraw this object. Refresh parent object.
On Change Change If the input field is visible, fill area with Change Background Colour
Background Background Colour background colour and redraw the object with Response
Colour command the new background colour.
On Change Change Numeric If input object is displayed, redraw object with Change Numeric Value response
Value Value command or new value. Refresh parent object. or Change String Value response
Change String
Value command
On Entry of Operator saving VT updates the Working Set with new value. VT Change Numeric Value
Value changes by use of message or VT Change String
the ENTER means Value message
regardless of
whether or not the
value changed
On Entry of New Operator saving Working Set is notified by the “On Entry of value”
Value changes by use of event so no additional notification is required on
the ENTER means this event. —
when value has
changed
On Change Change Attribute If field is visible, refresh. Change Attribute response.
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

B.8.2 Input Boolean object

The Input Boolean object is used to input a TRUE/FALSE type indication from the operator. This is a graphical
object and the appearance of the indicator when the value is > 0 is left to the VT, but it shall fit in the square
area specified by the width attribute. An example of a Boolean input is a checkbox.

When the value is 0, the object area is the background colour.

When the value is > 0, the VT draws the indicator using the foreground colour on the background colour.

NOTE VT Version 3 and prior have a Value range in the set {0, 1} but do not clarify the presentation when the value
is not in the set {0, 1}, which is possible when using a variable reference. In VT version 4 and later, the TRUE indication is
shown for any value > 0, and the FALSE indication for the value = 0. When the Input Boolean value is changed, the VT
shall indicate the state of the Input Boolean to the Working Set with a value in the set {0, 1}.

Value 0 Value 1

Figure B.3 — Input Boolean examples

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,

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 ISO 11783-6:2014(E)

Table B.16 — Input Boolean attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =7 3 Object Type = Input Boolean
Background 1 Integer 1 0-255 4 Background colour.
colour
Width 2 Integer 2 0-65535 5-6 Maximum width and height of the input field in
pixels.
Foreground 3 Integer 2 0-65534 7-8 Object ID of a Font Attributes object to use for
colour display formatting of this field. The only useful
attribute is the font colour
Variable 4 Integer 2 0-65534, 9-10 Object ID of a Number Variable object in which
reference 65535 to store or retrieve the object’s value. If this
attribute is set to NULL, the value is stored
directly in the value attribute instead.
Value [5] Integer 1 0, 1-255 11 Value of the input field. 0 for FALSE or >0 for
TRUE. Used only if variable reference attribute
is NULL.
a
Enabled [6] Integer 1 0 or 1 12 Current state of object.
0 = Disabled, 1 = Enabled
Number of Integer 1 0-255 13 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 14… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 15… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
a
VT version 4 and later.

B.8.3 Input String object

This object is used to input a character string from the operator. Displayable characters are shown in
Table L.1 — ISO 8859-1 (Latin 1) character set to Table L.7 — WideString minimum character set. Several
special formatting characters are permitted in the
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 ISO 11783-6:2014(E)

Input String object value and shall be properly interpreted by the VT, as specified. (See Clause 4.6.19.6 Non-
printing characters in strings)

Table B.17 — Input String attributes and record format

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the object
pool.
Type [0] Integer 1 =8 3 Object Type =
Input String object
Width 1 Integer 2 0-65535 4-5 Maximum width of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Background 3 Integer 1 0-255 8 Background colour. Used only if the “transparent”
colour bit in the options attribute is cleared. To be applied
in the complete rectangle specified by Width and
Height.
Font attributes 4 Integer 2 0-65534 9-10 Object ID of a Font Attributes object to use for
display formatting of this field.
Input attributes 5 Integer 2 0-65534, 11-12 Object ID of an Input Attributes object or extended
65535 Input Attributes object to use for character string
validation or NULL for no validation.
A referenced Input Attribute object or Extended
Input Attributes object must be of the same type as
the string value (or String Variable), in that both
must be either an 8-bit string, or a WideString. If
they are not of the same type no validation shall be
performed.
The indicated object and the Value match if the
indicated object is an Input Attributes object and
the Value is an 8-bit string, or if the indicated
object is an extended input object and the Value is
a WideString.
a
Options 6 Bitmask 1 0-3 13 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Transparent. If TRUE, the input field is
b
0-7 displayed with background showing through
instead of using the background colour attribute.
Bit 1 = Auto-Wrap. If TRUE, Auto-Wrapping rules
apply. (See Clause 4.6.19.5 Auto-wrap)
Bit 2 = Wrap on Hyphen. If TRUE, Auto-Wrapping
can occur between a hyphen (2D16) and the
following character. (See Clause 4.6.19.5 Auto-
wrap). Wrap on Hyphen is a modifier to the Auto-
Wrap option and is applied only if the Auto-Wrap
option is TRUE and ignored if the Auto-Wrap
b
option is FALSE.
Variable 7 Integer 2 0-65534, 14-15 Object ID of a String Variable object in which to
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

reference 65535 store or retrieve the object’s value. If this attribute

is set to NULL, the string is stored directly in the
value attribute instead. If this attribute is not NULL
(<= 65534) the Length and Value attributes are not

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
c
used.

a
Justification 8 Integer 1 0-2 16 Field justification. Indicates how the text string is
positioned within the field defined by width and
0-15
b height. See Clause 4.6.19.1 General
Text justification.
Horizontal Justification Value of Bits 0 – 1
0 = Position Left
1 = Position Middle
2 = Position Right
3 = Reserved
b
Vertical Justification Value of Bits 2 – 3
0 = Position Top
1 = Position Middle
2 = Position Bottom
3 = Reserved

During data input of this object, the VT designer

may choose to suppress justification until the field
is closed after input
Length Integer 1 0-255 17 Maximum fixed length of the
Input String object value in bytes. This may be set
to 0 if a variable reference is used. When variable
reference is used, its variable shall not exceed 255
bytes, since the length attribute of the
Input String object Value command (H.18) is only
one byte.
Value String Length 18… Value of the input field. Used only if variable
reference attribute is NULL.
This attribute shall have the size indicated by the
Length attribute – even if a variable reference is
used. Pad with spaces as necessary to satisfy
length attribute. The text can be either 8-bit or
WideString (See Clause 4.6.19.7 String encoding).
The string type (8-bit/WideString) shall not be
changed by the VT, however the Working Set may
cause the type to change from an 8-bit String to a
WideString or vice versa.
b
Enabled [9] Integer 1 0 or 1 Depends Current state of object. 0 = Disabled, 1 = Enabled
on size of
value
attribute
Number of Integer 1 0-255 Depends Number of Macro references included even if zero.
macros to on size of Each Macro reference consists of 2 bytes: one for
follow value event ID and one for Macro ID. Whenever the
attribute indicated event occurs, the associated Macro is
executed.
VT version 5 and later: A reference to a Macro with
16-bit Object ID shall count as 2 macro references
within the context of this attribute.
Repeat: Integer 1 0-255 Depends (List these after all objects have been listed.)
{Event ID} on size of 8-bit Macro Object ID reference: Event ID of event
value type that causes this Macro to execute.

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
attribute 16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see Clause
4.6.22.3)
{Macro ID} Integer 1 0-255 Depends 8-bit Macro Object ID reference: Macro ID of the
on size of Macro to execute.
value 16-bit Macro Object ID reference (only for VT
attribute version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
a
VT version 3 and prior.
b
VT version 4 and later.
C
For VT version 3 and prior, if the Variable reference is not NULL, the Length attribute shall be set to 0.

B.8.4 Input Number object

This object is used to format, display and change a numeric value based on a supplied integer value. The VT
shall use the following equation to format the displayed value:

Displayed value = (value attribute + Offset) * Scaling Factor

Depending on the ‘Options‘ attribute in Table B.18 — Input Number attributes and record format, displayed
values are either truncated or rounded to the number of decimals specified in the ‘Number of decimals‘
attribute.

NOTE: The displayed value shall be formatted according to the above equation even if the value is outside the min/max
value range.

NOTE: The VT should implement double precision operations to minimize rounding errors.

When the operator presses the Enter means, to close the input object after data input, the VT shall only
accept the new value if the following equations are true:

Scaled max value = (Max value + Offset) * Scaling Factor

Scaled min value = (Min value + Offset) * Scaling Factor

Scaled min value <= new value <= Scaled max value

If the above equations are not true the VT shall ignore the Enter means and keep the input object open for
data input.

If the above equations are true the VT sets the value attribute of the input number object or the referenced
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

numeric value object according to the following equation:

Value attribute = (new value / Scaling Factor) – Offset

NOTE While the operator is not allowed to enter values outside the min/max range, the ECU is allowed to set any
value either by pool upload or by the Change Numeric Value command.

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 ISO 11783-6:2014(E)

Table B.18 — Input Number attributes and record format

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the object
pool.
Type [0] Integer 1 =9 3 Object Type = Input Number
Width 1 Integer 2 0-65535 4-5 Maximum width of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Background 3 Integer 1 0-255 8 Background colour. Used only if the “transparent”
colour bit in the options attribute is cleared. To be applied
in the complete rectangle specified by Width and
Height.
Font attributes 4 Integer 2 0-65534 9-10 Object ID of a Font Attributes object to use for
display formatting of this field.
a
Options 5 Bitmask 1 0-7 11 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Transparent. If TRUE, the input field is
b
0-15 displayed with background showing through
instead of using the background colour attribute.
Bit 1 = Display leading zeros. If TRUE, fill left to
width of field with zeros; justification is applied after
filling to the width of the field with zeros.
Bit 2 = Display zero as blank if this bit is TRUE.
When this option bit is set, a blank field is displayed
if and only if the displayed value of the object is
exactly zero.
Except when the field is blank, the VT shall always
display at least one digit before the decimal point.
(examples: 2.2, 0.2)
Bit 3 = Truncate. If TRUE the value shall be
truncated to the specified number of decimals.
Otherwise it shall be rounded off to the specified

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
bc
number of decimals.
NOTE: Designer should account for a unary minus
sign with respect to leading zeros and the field
width.
Variable 6 Integer 2 0-65534, 12-13 Object ID of a Number Variable object in which to
reference 65535 store or retrieve the object’s raw unscaled value. If
this attribute is set to NULL, the value is stored
directly in the value attribute instead. VT transmits
the raw unscaled value to the Working Set.
Value [14] Integer 4 0 14-17 Raw unsigned value of the input field before
to scaling (unsigned 32-bit integer). Used only if
2^32-1 variable reference attribute is NULL. VT transmits
the raw unscaled value to the Working Set.
Min value 7 Integer 4 0 18-21 Raw minimum value for the input before scaling.
to Offset and scaling shall be applied to determine the
2^32-1 actual minimum value.
Max value 8 Integer 4 0 22-25 Raw maximum value for the input. Offset and
to scaling shall be applied to determine the actual

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
2^32-1 maximum value.
Offset 9 Signed 4 -2^31 26-29 Offset to be applied to the input value and min/max
Integer to values (32-bit signed integer).
2^31-1
Scale 10 Float 4 30-33 Scale to be applied to the input value and min/max
values.
Number of 11 Integer 1 0-7 34 Specifies number of decimals to display after the
decimals decimal point.
Format 12 Boolean 1 0 or 1 35 0 = use fixed format decimal display (####.nn)
1 = use exponential format ([-]###.nnE[+/-]##)
where n is set by the number of decimals attribute.
a
Justification 13 Integer 1 0-2 36 Field justification. Indicates how the number is
positioned within the field defined by width and
0-15
b height. See Clause 4.6.19.1 General
Text justification.
Horizontal Justification Value of Bits 0 – 1
0 = Position Left
1 = Position Middle
2 = Position Right
3 = Reserved
b
Vertical Justification Value of Bits 2 – 3
0 = Position Top
1 = Position Middle
2 = Position Bottom
3 = Reserved
During data input of this object, the VT designer
may choose to suppress justification until the field
is closed after input .
b a
Options 2 [15] Integer 1 0, 1 37 Logical bits to indicate options. 1 = TRUE.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Bit 0 = Enabled. If TRUE the object shall be

b
0–3 enabled. If FALSE, the object is disabled.
b
Bit 1 = real time editing. If TRUE the value shall
be transmitted to the ECU as it is being changed.
(See Real Time in Clause 4.2).
Number of Integer 1 0-255 38 Number of Macro references included even if zero.
macros to Each Macro reference consists of 2 bytes: one for
follow event ID and one for Macro ID. Whenever the
indicated event occurs, the associated Macro is
executed.
VT version 5 and later: A reference to a Macro with
16-bit Object ID shall count as 2 macro references
within the context of this attribute.
Repeat: Integer 1 0-255 39… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of event
type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see Clause
4.6.22.3)
{Macro ID} Integer 1 0-255 40… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
version 5 and later): Low byte or high byte of Macro
ID of the Macro to execute (see Clause 4.6.22.3)
a
VT version 3 and prior.
b
VT Version 4 and later.
c
Prior to VT version 4, the behaviour was undefined.

B.8.5 Input List object

The Input List object is used to show one object out of a set of objects, and to allow operator selection of one
object from the set. The object to show is determined by the Value attribute or a Variable reference.

The exact implementation and appearance of the Input List object is proprietary to the VT. For example, a
simple implementation of the Input List object could be to display values as the operator moves through the
list using +/− keys. A more complex implementation could be to draw a graphical pop-up list box with a scroll
bar for moving through the allowable values. In either case, only the current value shall be displayed when this
object is not open for edit. The width and height attributes define the width and height of the displayed value
only.

This object is used to select an item from a list of objects. The value transmitted to the Working Set Master is
the list index chosen (range 0-254).

NOTE In VT version 3 and prior, the behavior with the value 255 was not defined. The value 255 is used to indicate
that no item is chosen. The CF may set the value to 255 for this purpose. The operator, in the process of selecting a list
item, shall not be allowed to set the value to 255.

The operator also shall not be allowed to set the value to an invalid index (an index which is greater than the
number of items in the list minus 1). However, if the list references a number variable, then it is possible for
that number variable to be set by the Working Set or by the operator (by using a different input object) to a
value which is not a valid index for the list.

When a list item is an Object Pointer with a value of NULL or is a Container, and the Container is in the hidden
state, it is considered an empty object. It will still occupy a position in the displayed list, so it can still be
selected by the operator, even though its contents will not be visible.

When a list item has an Object ID of NULL it is considered an invisible object. It does not occupy a position in
the displayed list and cannot be selected by the operator. However, it is still counted when determining list
indexes and maintains its position in the list even though it is not visible to the operator.

The VT shall not display anything for the selected item in the following cases:

⎯ index value is 255 which means “no item is chosen”

⎯ index value is invalid (greater than the number of items in the list minus 1)

⎯ selected list item is a no-item placeholder (NULL)

⎯ selected list item is an Object Pointer with a value of NULL

⎯ selected list item is a Container, and the container is in the hidden state

Allowed Commands:
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⎯ Enable/Disable Object command;

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⎯ Select Input Object command;

⎯ ESC command;

⎯ Change Numeric Value command;

⎯ Change Attribute command;

⎯ Change List Item command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.19 — Input List events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Enable Enable/Disable Mark the input object enabled. If displayed, Enable/Disable Object Response
Object command operator can navigate to it.
On Disable Enable/Disable Mark the input object disabled. Even if displayed, Enable/Disable Object Response
Object command the operator cannot select this object for input.
VT shall make it clear to the operator that the
input field is disabled.
On Input Field Select Input Object The VT shall provide some way for the operator VT Select Input Object message
Selection command or to recognize that the input object is selected (has
operator navigates focus).
to input object
On Input Field Select Input Object
De-selection command or
operator navigates
— VT Select Input Object message
off input object or
as a result of a
disable event
On ESC Operator aborts If the input object is not enabled for real time VT ESC message or ESC
input using ESC editing, then revert the value of the object to the response
key or Working Set value before operator began the input . (See (See Clause 4.6.17 Operator
sends an ESC Clause 4.2 section Real Time ) input)
command Redraw this object. Refresh parent object.
On Change Change Numeric If input object is displayed, redraw object with Change Numeric Value response
Value Value command (to new value. Refresh parent object.
change the list
index)
On Entry of Operator saving VT updates the Working Set with new value VT Change Numeric Value
Value changes by use of message
the ENTER means
regardless of
whether or not the
value (list index)
changed
On Entry of New Operator saving Working Set is notified by the “On Entry of value” —

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Event Caused by VT behaviour Message

Value changes by use of event so no additional notification is required on
the ENTER means this event.
when value (list
index) has changed
On Change Change Attribute If object is visible, refresh. Change Attribute response.
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

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 ISO 11783-6:2014(E)

Table B.20 — Input List attributes and record format

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the object
pool.
Type [0] Integer 1 =10 3 Object Type = Input List
Width 1 Integer 2 0-65535 4-5 Maximum width of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the input field in pixels. Objects
or portions of objects outside the defined area are
clipped.
Variable 3 Integer 2 0-65534, 8-9 Object ID of a Number Variable object in which to
reference 65535 store or retrieve the object’s value. If this attribute
is set to NULL, the value is stored directly in the
value attribute instead.
Value [4] Integer 1 0-254, 255 10 Selected list index of this object. Used only if
variable reference attribute is NULL. The current
list item chosen or 255 to indicate no item is
chosen. The first item is at index zero (0).
Number of list Integer 1 0-255 11 Number of object references to follow. The size of
items the list can never exceed this number and this
attribute cannot be changed.
b a
Options [5] Integer 1 0, 1 12 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Enabled. If TRUE the object shall be
b
0-3 enabled. If FALSE, the object is disabled.
b
Bit 1 = real time editing. If TRUE the value shall
be transmitted to the ECU as it is being changed.
(See Real Time in Clause 4.2)
Number of Integer 1 0-255 13 Number of Macro references included even if zero.
macros to Each Macro reference consists of 2 bytes: one for
follow event ID and one for Macro ID. Whenever the
indicated event occurs, the associated Macro is
executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534, 14+ These objects make up the list. NULL is a no-item
{Object ID} 65535 object*2 placeholder (invisible object). (See Clause A.1.3
Object relationships). The Change List Item
command allows objects to be replaced or
removed.
Repeat: Integer 1 0-255 14+ (No. (List these after all objects have been listed.)
{Event ID} List Items 8-bit Macro Object ID reference: Event ID of event
* 2)… type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see Clause
4.6.22.3)
{Macro ID} Integer 1 0-255 15+ (No. 8-bit Macro Object ID reference: Macro ID of the
List Items Macro to execute.
* 2)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of

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Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Macro ID of the Macro to execute (see Clause
4.6.22.3)
a
VT Version 3 and prior.
b
VT Version 4 and later.

B.9 Output field objects

B.9.1 General

There are three types of output field: string, number, and list. They have similar relationships and behaviour,
but have different attributes. See Table B.21 — Output field events to Table B.25 — Output List attributes and
record format.

Allowed Commands (See Clause B.9.4 for Output List object allowed commands):

⎯ Change Background Colour command;

⎯ Change Numeric Value command (excluding Output String object);

⎯ Change String Value command (Output String object only);

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.21 — Output field events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Change Change If the output field is visible, fill area with Change Background Colour
Background Background Colour background colour and redraw the object with Response
Colour command the new background colour.
On Change Change Numeric If output object is displayed, redraw object with Change Numeric Value response
Value Value command or new value. Refresh parent object. or Change String Value response
Change String
Value command
On Change Change Attribute If output object is displayed, redraw object with Change Attribute response
Attribute command new value. Refresh parent object.
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.
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 ISO 11783-6:2014(E)

B.9.2 Output String object

This object is used to output a string of text. Displayable characters are given in Table L.1 — ISO 8859-1
(Latin 1) character set to Table L.7 — WideString minimum character set. Several special formatting
characters are permitted in the Output String value and shall be properly interpreted by the VT as specified in
Clause 4.6.19.6 Non-printing characters in strings.

Table B.22 — Output String attributes and record format

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the object
pool.
Type [0] Integer 1 =11 3 Object Type = Output String
Width 1 Integer 2 0-65535 4-5 Maximum width of the output field in pixels.
Objects or portions of objects outside the defined
area are clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the output field in pixels.
Objects or portions of objects outside the defined
area are clipped.
Background 3 Integer 1 0-255 8 Background colour. Used only if the “transparent”
colour bit in the options attribute is cleared. To be applied
in the complete rectangle specified by Width and
Height.
Font attributes 4 Integer 2 0-65534 9-10 Object ID of a Font Attributes object to use for
display formatting of this field.
a
Options 5 Bitmask 1 0-3 11 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Transparent. If TRUE, the output field is
b
0-7 displayed with background showing through
instead of using the background colour attribute.
Bit 1 = Auto-Wrap. If TRUE, Auto-Wrapping rules
apply. (See Clause 4.6.19.5 Auto-wrap)
Bit 2 = Wrap on Hyphen. If TRUE, Auto-Wrapping
can occur between a hyphen (2D16) and the
following character. (See Clause 4.6.19.5 Auto-
wrap) Wrap on Hyphen is a modifier to the Auto-
Wrap option and is applied only if the Auto-Wrap
option is TRUE and ignored if the Auto-Wrap
b
option is FALSE.
Variable 6 Integer 2 0-65534, 12-13 Object ID of a String Variable object from which to
reference 65535 retrieve the object’s value. If this attribute is set to
NULL, the string is stored directly in the value
attribute instead. If this attribute is not NULL (<=
65534) the Length and Value attributes are not
c
used.
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b
Justification 7 Integer 1 0-2 14 Field justification. Indicates how the text string is
positioned within the field defined by width and
0-15
a height. See Clause 4.6.19.2 Text justification.
Justification is always done on a graphical (i.e.
pixel) basis. (See Table B.23 — Output Number
attributes and record format)
Horizontal Justification Value of Bits 0 – 1
0 = Position Left
1 = Position Middle

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
2 = Position Right
3 = Reserved
a
Vertical Justification Value of Bits 2 – 3
0 = Position Top
1 = Position Middle
2 = Position Bottom
3 = Reserved
Length Integer 2 0-65535 15-16 Maximum fixed length of the output string value in
bytes. This may be set to 0 if a variable reference
is used.
Value String Length 17-n Text string to output in the output field. If Length is
zero, this attribute is excluded from the record.
This attribute shall have the size indicated by the
Length attribute – even if a variable reference is
used. Pad with spaces as necessary to satisfy
length attribute. May also contain formatting codes
as described above.
The text string can be 8-bit or WideString (See
Clause 4.6.19.7 String encoding).
The Working Set may cause the type to change
from an 8-bit String to a WideString or vice versa.
Number of Integer 1 0-255 Depends Number of Macro references included even if zero.
macros to on size of Each Macro reference consists of 2 bytes: one for
follow string event ID and one for Macro ID. Whenever the
indicated event occurs, the associated Macro is
executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 Depends (List these after all objects have been listed.)
{Event ID} on size of 8-bit Macro Object ID reference: Event ID of event
string type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see Clause
4.6.22.3)
{Macro ID} Integer 1 0-255 Depends 8-bit Macro Object ID reference: Macro ID of the
on size of Macro to execute.
string 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
a
VT version 4 and later.
b
VT version 3 and prior.
c
For VT version 3 and prior, if the Variable reference is not NULL, the Length attribute shall be set to 0.

B.9.3 Output Number object

This object is used to format and output a numeric value based on a supplied integer value. The VT shall use
the following equation to format the displayed value:

Displayed value = (value attribute + Offset) * Scaling Factor

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Depending on the ‘Options’ attribute presented in Table B.23 — Output Number attributes and record format,
displayed values are either truncated or rounded to the number of decimals specified in the ‘Number of
decimals’ attribute.

NOTE The VT should implement double precision operations to minimize rounding errors.

Table B.23 — Output Number attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =12 3 Object Type = Output Number
Width 1 Integer 2 0-65535 4-5 Maximum width of the output field in pixels.
Objects or portions of objects outside the
defined area are clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the output field in pixels.
Objects or portions of objects outside the
defined area are clipped.
Background 3 Integer 1 0-255 8 Background colour. Used only if the
colour “transparent” bit in the options attribute is
cleared. To be applied in the complete
rectangle specified by Width and Height.
Font attributes 4 Integer 2 0-65534 9-10 Object ID of a Font Attributes object to use for
display formatting of this field.
a
Options 5 Bitmask 1 0-7 11 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Transparent. If TRUE, the output field is
c
0-15 displayed with background showing through
instead of using the background colour
attribute.

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Bit 1 = Display leading zeros. If TRUE, fill left to
width of field with zeros; justification is applied
after filling to the width of the field with zeros.
Bit 2 = Display zero value as blank if this bit is
TRUE. When this option bit is set, a blank field
is displayed if and only if the value of the object
is exactly zero.
NOTE: Except when the field is blank, the VT
shall always display at least one digit before
the decimal point. (examples: 2.2, 0.2)
Bit 3 = Truncate. If TRUE the value shall be
truncated to the specified number of decimals.
Otherwise it shall be rounded off to the
bc
specified number of decimals.
Variable 6 Integer 2 0-65534, 12-13 Object ID of an integer variable object in which
reference 65535 to retrieve the object’s raw unscaled value. If
this attribute is set to NULL, the value is
retrieved directly from the value attribute
instead. VT shall scale the value for display.
Value [12] Integer 4 0 14-17 Raw unsigned value of the output field before
to scaling (unsigned 32-bit integer). Used only if
2^32-1 variable reference attribute is NULL. VT shall
scale this value for display.

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Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Offset 7 Signed 4 -2^31 18-21 Offset to be applied to the value for display (32-
Integer to bit signed integer).
2^31-1
Scale 8 Float 4 22-25 Scale to be applied to the value for display.
Number of 9 Integer 1 0-7 26 Specifies number of decimals to display after

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
decimals the decimal point.
Format 10 Boolean 1 0 or 1 27 0 = use fixed format decimal display (####.nn)
1 = use exponential format ([−]###.nnE[+/−]##
where n is set by the number of decimals
attribute).
a
Justification 11 Integer 1 0-2 28 Field justification. Indicates how the number is
positioned within the field defined by width and
0-15
c height. See Clause 4.6.19.2 Text justification.
Justification is always done on a graphical (i.e.
pixel) basis.
Horizontal Justification Value of Bits 0 – 1
0 = Position Left
1 = Position Middle
2 = Position Right
3 = Reserved
bc
Vertical Justification Value of Bits 2 – 3
0 = Position Top
1 = Position Middle
2 = Position Bottom
3 = Reserved
Number of Integer 1 0-255 29 Number of Macro references included even if
macros to zero. Each Macro reference consists of 2 bytes:
follow one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 30… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 31… 8-bit Macro Object ID reference: Macro ID of
the Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
a
VT Version 3 and prior.
b
VT Version 4 and later.
c
Prior to VT version 4, the behaviour was undefined.

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 ISO 11783-6:2014(E)

B.9.4 Output List object

The Output List object, available in VT version 4 and later, is used to show one object out of a set of objects.
The object to shown is determined by the Value attribute or a Variable reference.

The VT shall not display anything for the selected item in the following cases:

⎯ index value is 255 which means “no item is chosen”

⎯ index value is invalid (greater than the number of items in the list minus 1)

⎯ selected list item is a no-item placeholder (NULL)

⎯ selected list item is an Object Pointer with a value of NULL

⎯ selected list item is a Container, and the container is in the hidden state

⎯ the object is enabled and the numeric relationships shown below have been violated

Allowed Commands:

⎯ Change Numeric Value command;

⎯ Change Attribute command;

⎯ Change List Item command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.24 — Output List events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object. —

Refresh for caused
by conditions
On Change Change Numeric If object is displayed, redraw object with new Change Numeric Value response
Value Value command (to value. Refresh parent object.
change the list
index)
On Change Change Attribute If object is visible, refresh. Change Attribute response
Attribute command
On Change Change Size Draw object at current location in background Change Size response
Size command colour to erase it. Refresh parent mask.

Table B.25 — Output List attributes and record format

Attribute AID Type Size Range or Record Description
name Bytes value byte

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 ISO 11783-6:2014(E)

Attribute AID Type Size Range or Record Description

name Bytes value byte

Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =37 3 Object Type = Output List
Width 1 Integer 2 0-65535 4-5 Maximum width of the output field in pixels.
Objects or portions of objects outside the
defined area are clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the output field in pixels.
Objects or portions of objects outside the
defined area are clipped.
Variable 3 Integer 2 0-65534, 8-9 Object ID of a Number Variable object from
reference 65535 which to retrieve the object’s value. If this
attribute is set to NULL, the value is found
directly in the value attribute instead.
Value [4] Integer 1 0-254, 255 10 Selected list index of this object. Used only if
variable reference attribute is NULL. The
current list item chosen or 255 to indicate no
item is chosen. The first item is at index zero
(0).
Number of Integer 1 0-255 11 Number of object references to follow. The
list items size of the list can never exceed this number
and this attribute cannot be changed.
Number of Integer 1 0-255 12 Number of Macro references included even if
macros to zero. Each Macro reference consists of
follow 2 bytes: one for event ID and one for Macro
ID. Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a
Macro with 16-bit Object ID shall count as 2
macro references within the context of this
attribute.
Repeat: Integer 2 0-65534, 13+ These objects make up the list. NULL is a
{Object ID} 65535 object* no-item placeholder (invisible object). (See
2 Clause A.1.3 Object relationships)
The Change List Item command allows
objects to be replaced or removed.

Repeat: Integer 1 0-255 13+ (No. (List these after all objects have been listed.)
{Event ID} List Items 8-bit Macro Object ID reference: Event ID of
* 2)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type
that causes this Macro to execute or 0xFF
(see Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 14+ (No. 8-bit Macro Object ID reference: Macro ID of
List Items the Macro to execute.
* 2)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see
Clause 4.6.22.3)

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 ISO 11783-6:2014(E)

B.10 Output shape objects

B.10.1 General

There are four types of output shape object: line, rectangle, ellipse, and polygon. They have similar
relationships and behaviour, but different attributes. Points contained by these objects are always drawn using
a square “paintbrush”, with the actual point being in the upper left corner of the paintbrush. The width of the
paintbrush is given by the line width attribute. The endpoint is relative to the X-Y start location attributes in the
parent object. See Figure B.4 — Output Line object showing start and end points using different brush sizes to
Figure B.8 — Output Polygon types and Table B.26 — Output Line events to Table B.32 — Output Polygon
events

B.10.2 Output Line object

This object outputs a line shape. The starting point for the line is found in the parent object.

Allowed Commands:

⎯ Change End Point command;

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Key
Symbol Width Height Direction Attribute: Line Width
a 8 8 0 1
b 9 9 0 2
c 9 9 1 2
d 2 9 0 2
e 1 10 0 3
f 1 1 Any >= 1
g 2 2 Any >= 2
h 9 2 0 2
i 10 2 0 3

Figure B.4 — Output Line object showing start and end points using different brush sizes

© ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

Table B.26 — Output Line events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Change End Change End Point Redraw this object. Refresh parent mask. Change End Point Response
Point command
On Change Change Attribute Redraw this object. Refresh parent mask. Change Attribute response
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.27 — Output Line attributes and record format

Size Range or Record

Attribute Name Aid Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =13 3 Object Type = Output line
Line attributes 1 Integer 2 0-65534 4-5 Object ID of a Line Attributes object to use for
the line attributes.
Width 2 Integer 2 0-65535 6-7 Width in pixels of an enclosing virtual
rectangle.
NOTE: X position plus Width – 1 and Y position
plus Height – 1 define the clipping limits.
Height 3 Integer 2 0-65535 8-9 Height in pixels of an enclosing virtual
rectangle.
NOTE: X position plus Width – 1 and Y position
plus Height – 1 define the clipping limits.
Line Direction 4 Integer 1 0 or 1 10 0 = Line is drawn from top left to bottom right of
enclosing virtual rectangle

StartX = X position of this object

StartY = Y position of this object
EndX = StartX + Width - Line Width
EndY = StartY + Height - Line Width
Note: if EndX < StartX then EndX = StartX
Note: if EndY < StartY then EndY = StartY

1 = Line is drawn from bottom left to top right of

enclosing virtual rectangle

StartX = X Position of this object

StartY = Y Position of this object + Height - Line
Width
EndX = StartX + Width - Line Width
EndY = Y Position of this object
Note: if EndX < StartX then EndX = StartX
Note: if StartY < EndY then StartY = EndY

See Figure B.4 — Output Line object showing

116 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name Aid Type Description
(bytes) Value byte
start and end points using different brush sizes
for examples of start and end points and line
width.
Number of Integer 1 0-255 11 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 12… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 13… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)

B.10.3 Output Rectangle object

This object outputs a rectangle shape. See Figure B.5 — Output Rectangle object showing end points using
different brush sizes.

Allowed Commands:

⎯ Change Size command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Figure B.5 — Output Rectangle object showing end points using different brush sizes

Table B.28 — Output Rectangle Events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command

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 ISO 11783-6:2014(E)

Table B.29 — Output Rectangle attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =14 3 Object Type = Output Rectangle
Line attributes 1 Integer 2 0-65534 4-5 Object ID of a Line Attributes object to use for
the Line Attributes.
Width 2 Integer 2 0-65535 6-7 Width in pixels.
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Endpoint can be calculated as follows:
EndPointX = StartX + Width – LineWidth
EndPointY = StartY + Height – LineWidth
See Figure B.5 — Output Rectangle object
showing end points using different brush sizes
for an example of start and end points and line
width.
Height 3 Integer 2 0-65535 8-9 Height in pixels.
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Endpoint can be calculated as follows:
EndPointX = StartX + Width – LineWidth
EndPointY = StartY + Height – LineWidth
See Figure B.5 — Output Rectangle object
showing end points using different brush sizes
for an example of start and end points and line
width.
Line 4 Bitmask 1 0-15 10 Line suppression. These may be combined.
suppression 0 = Closed rectangle
Bit 0 = 1 = Suppress Top Line (smallest Y
value)
Bit 1 = 1 = Suppress Right Side Line (largest X
value)
Bit 2 = 1 = Suppress Bottom Line (largest Y
value)
Bit 3 = 1 = Suppress Left Side Line (smallest X
value)
NOTE: When drawing a filled rectangle with line
suppression, only the pixels that would be on
the border of the rectangle are suppressed (not
drawn). See Figure 17 — Rectangle line
suppression and filling examples.
Line width shall be taken into account to know
the width of the border.
Fill attributes 5 Integer 2 0-65534, 11-12 Object ID of a Fill Attributes object to use for the
65535 Fill Attributes or NULL for no fill.
Number of Integer 1 0-255 13 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 14… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 15… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.10.4 Output Ellipse object

This object outputs an ellipse or circle shape. Several options are available for modifying the appearance (See
Figure B.6 — Output Ellipse object).

Key
1 start angle
2 end angle

Figure B.6 — Output Ellipse object

Allowed Commands:
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⎯ Change Size command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

1 1
1

2
2 2
a) Correct b) Correct c) Incorrect

Key
1 44°
2 314°

Figure B.7 — Output Ellipse object – correct and incorrect rendering

Special care should be used when drawing an ellipse which is not a circle. The drawn angle between the start
and end angles shall be measured to be accurate. For example, in Figure B.7 — Output Ellipse object –
correct and incorrect rendering, the attributes start angle, end angle, and width of all three ellipses are the
same. The ellipse on the left is a circle with the height equal to the width, and the ellipses in the centre and on
the right both have the height equal to half the width. The angle of the opening should be 90° on all three
ellipses. However, the ellipse on the right, was drawn incorrectly using a popular ellipse rendering algorithm
that simply scales the full circle to half height. The result is that the angle of the opening is less than 90°.

NOTE Commonly available displays may not have a square aspect ratio for the pixels. The drawing method
is not required to compensate for the physical display characteristics.

Table B.30 — Output Ellipse events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
refresh for caused —
by conditions
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command

Table B.31 — Output Ellipse attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =15 3 Object Type = Ellipse
Line attributes 1 Integer 2 0-65534 4-5 Object ID of a Line Attributes object to use for
the Line Attributes.
Width 2 Integer 2 0-65535 6-7 Width in pixels of an enclosing virtual rectangle.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Height 3 Integer 2 0-65535 8-9 Height in pixels of an enclosing virtual
rectangle.
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Ellipse type 4 Integer 1 0-3 10 Type of ellipse (See Figure B.6 — Output
Ellipse object):
0 = Closed Ellipse
1 = Open Ellipse defined by start/end angles
2 = Closed Ellipse Segment
3 = Closed Ellipse Section
NOTE: If type > 0 and start and end angles are
the same, the ellipse is drawn closed.
NOTE: If type = closed ellipse segment and
start and end angle are the same, a single line
with width = border width shall be drawn from
the centre point to the point on the border
defined by the start and end angles.
Start angle 5 Integer 1 0-180 11 Start angle/2 (in degrees) from positive X axis
counter clockwise (90° is straight up). Start and
end angles define the arc.
End angle 6 Integer 1 0-180 12 End angle/2 (in degrees) from positive X axis
counter clockwise (90° is straight up). Start and
end angles define the arc.
Fill attributes 7 Integer 2 0-65534, 13-14 Object ID of a Fill attributes object to use for the
65535 Fill Attributes or NULL for no fill.
Number of Integer 1 0-255 15 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 16… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 17… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

122 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

B.10.5 Output Polygon object

This object outputs a polygon. Four types of polygon are possible: convex, non-convex, complex and open. If
the type is not open, the Working Set shall specify the type of polygon as this could affect the efficiency of the
fill algorithm. If the type is not known, the type should be set to complex since fill algorithms on complex
polygons will work on all three fillable types. The VT designer may also choose to implement only the complex
fill algorithm and ignore the polygon type attribute. The VT shall use the "even-odd" fill rule. The "non-zero
winding" fill rule is not supported.

The start point for the polygon is the first point listed. Polygon is drawn using the points in the list in the order
given. At least three points are required for a polygon. The point positions are relative to the upper left-hand
corner of the Output Polygon object and the upper left-hand corner of the Output Polygon object is relative to
the parent object.

If the polygon type is not “OPEN” and the Working Set does not close the polygon, the VT shall automatically
close the polygon by joining the first and last points given.

See Figure B.8 — Output Polygon types

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Figure B.8 — Output Polygon types

Allowed Commands:

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Change Polygon Point command;

⎯ Change Polygon Scale command;

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 ISO 11783-6:2014(E)

⎯ Get Attribute Value message (VT version 4 and later).

Table B.32 — Output Polygon events

Event Caused by VT behaviour Message

On Refresh Change Polygon Redraw this object. Change Polygon Point response
Point command Change Polygon Scale response
Change Polygon
Scale command
Also, see Data
Mask Refresh for
caused by
conditions
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.33 — Output Polygon attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =16 3 Object Type = Polygon
Width 1 Integer 2 0-65535 4-5 Width in pixels of an enclosing virtual rectangle.
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Height 2 Integer 2 0-65535 6-7 Height in pixels of an enclosing virtual
rectangle.
(StartX, StartY) to (StartX + Width – 1, StartY +
Height – 1) inclusive defines the graphical
clipping limits when drawing this object.
Line attributes 3 Integer 2 0-65534 8-9 Object ID of a Line Attributes object to use for
the Line Attributes.
Fill attributes 4 Integer 2 0-65534, 10-11 Object ID of a Fill attributes object to use for the
65535 Fill Attributes or NULL for no fill.
Polygon type 5 Integer 1 0-3 12 Polygon type. The first three types are useful
only if the polygon is to be filled. VT designer
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may choose to implement only a complex fill

algorithm since it will work with all types.
Polygon type can only be changed from open to
not open or from not open to open.
0 = Convex. On any given horizontal line, only
two points on the polygon are encountered.
1 = Non-Convex. On any given horizontal line,
more than two points on the polygon edges can
be encountered but the polygon edges do not
cross.
2 = Complex. Similar to Non-convex but edges
cross. Uses Complex Fill Algorithm.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
3 = Open. This type cannot be filled.
Number of Integer 1 3-255 13 Number of points to follow. Each point is
points 4 bytes. At least three (3) points shall be listed
or this object cannot exist.
Number of Integer 1 0-255 14 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65535 15+point#* X value of a point relative to the top left corner
{Point X} 4 of the polygon.
{Point Y} Integer 2 0-65535 17+point#* Y value of a point relative to the top left corner
4 of the polygon.
Repeat: Integer 1 0-255 15+(num (List these after all objects have been listed.)
{Event ID} points * 8-bit Macro Object ID reference: Event ID of
4)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 16+(num 8-bit Macro Object ID reference: Macro ID of the
points * Macro to execute.
4)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.11 Output graphic objects

B.11.1 General

There are three types of output graphic object: Output Meter object, Output Linear Bar Graph object and
Output Arched Bar Graph object.

In VT Version 4 and later, if the minimum value is not less than the maximum value, then the object shall be
drawn as if the value (or target value) is equal to the minimum value and without regard to the maximum
value. Additionally, if the value (or target value) is less than the minimum, the object shall be drawn as if the
value (or target value) is equal to the minimum. Likewise, if the value (or target value) is greater than the
maximum, the object shall be drawn as if the value (or target value) is equal to the maximum.

In VT Version 3 and prior, the constraints of minimum, value, target, and maximum were not defined.

B.11.2 Output Meter object

This object is a meter. General appearance is left to the VT but the meter is drawn about a circle enclosed
within a defined square. The indicated angle attributes are computed from the positive X axis in a
mathematically positive direction (anticlockwise). As with all objects, the VT shall take appropriate action when
objects are overlaid so that moving the needle does not corrupt other objects underneath the meter. The
position attribute of the meter (in the parent object) always refers to the upper left corner of the enclosing
square regardless of orientation. This object is drawn transparent so that objects can be placed underneath to

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 ISO 11783-6:2014(E)

enhance the appearance. See Figure B.9 — Output Meter object and Figure B.10 — Output Meter object —
examples and Table B.34 — Output Meter events and Table B.35 — Output Meter attributes and record
format.

NOTE It is recommended that the length of any visible tick marks are 10% of the width of the meter, with a minimum
of 1 pixel (e.g. if the meter is less than 10 pixels in width).
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Key
1 start angle
2 end angle
3 needle
4 arc
5 ticks (only 2 ticks are shown for what would be equally spaced from the start angle to the end angle)
a Meter object cannot exceed boundaries of enclosing square.

Figure B.9 — Output Meter object

Allowed Commands:

⎯ Change Numeric Value command;

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

Table B.34 — Output Meter events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Change Change Numeric Redraw this object, refresh parent mask. Change Numeric Value response
Value Value command
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.35 — Output Meter attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =17 3 Object Type = Output Meter
Width 1 Integer 2 0-65535 4-5 Maximum width and height of the enclosing
square in pixels. Meter object cannot exceed
the bounds of this imaginary square.
Needle colour 2 Integer 1 0-255 6 Needle (indicator) colour.
Border colour 3 Integer 1 0-255 7 Border colour (if drawn).
Arc and tick 4 Integer 1 0-255 8 meter arc and tick colour (if drawn).
colour
Options 5 Bitmask 1 0-15 9 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Draw Arc
Bit 1 = Draw Border
Bit 2 = Draw Ticks
Bit 3 = Deflection Direction. 0 = From minimum
to maximum, anticlockwise. 1 = From minimum
to maximum, clockwise
Number of ticks 6 Integer 1 0-255 10 Number of ticks to draw about meter arc. If one
tick, it is drawn in the middle of the arc. For two
or more ticks a tick is placed at each end of the
arc and the rest are evenly spaced between
them.
Start angle 7 Integer 1 0-180 11 Start angle/2 (in degrees) from positive X axis
anticlockwise (90° is straight up). Start and end
angles define the arc. If the start and end
angles are the same the meter’s arc is closed
(360°).
End angle 8 Integer 1 0-180 12 End angle/2 (in degrees) from positive X axis
anticlockwise (90° is straight up). Start and end
angles define the arc. If the start and end
angles are the same the meter’s arc is closed
(360°).
Min value 9 Integer 2 0-65535 13-14 Minimum value. Represents value when needle
is at start of arc.
Max value 10 Integer 2 0-65535 15-16 Maximum value. Represents value when needle

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
is at end of arc.
Variable 11 Integer 2 0-65534, 17-18 Object ID of a Number Variable object in which
reference 65535 to retrieve the meter’s value. If this attribute is
set to NULL, the value is retrieved directly from
the value attribute instead.
The referenced Number Variable’s value shall
be in the range 0-65535.
Value [12] Integer 2 0-65535 19-20 Current value. Needle position is set by this
value. Used only if variable reference is NULL.
Number of Integer 1 0-255 21 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 22… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 23… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Key
a Needle only.

b Appearance of the Meter object is at the discretion of the VT designer.

Figure B.10 — Output Meter object — examples

B.11.3 Output Linear Bar Graph object

This object is a linear bar graph or thermometer. Linear bar graphs are defined by an enclosing rectangle in
any one of four orientations. A target value can be optionally marked on the bar graph. The position attribute
of the bar graph (in the parent object) always refers to the upper left corner of the enclosing rectangle
regardless of orientation.

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 ISO 11783-6:2014(E)

Key
1 value
2 target value
3 minimum value
4 maximum value

Figure B.11 — Output Linear Bar Graph — examples

This object is drawn transparent so that objects can be placed underneath to enhance the appearance. See
Figure B.11 — Output Linear Bar Graph — examples and Table B.36 — Output Linear Bar Graph events and
Table B.37 — Output Linear Bar Graph attributes and record format.

Allowed Commands:

⎯ Change Numeric Value command;

130 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.36 — Output Linear Bar Graph events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions
On Change Change Numeric Redraw this object, refresh parent mask. Change Numeric Value response
Value Value command
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.37 — Output Linear Bar Graph attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =18 3 Object Type = Output Output Linear Bar Graph
object
Width 1 Integer 2 0-65535 4-5 Maximum width of the enclosing rectangle in
pixels. Bar graph cannot exceed the bounds of
this imaginary rectangle.
Height 2 Integer 2 0-65535 6-7 Maximum height of the enclosing rectangle in
pixels. Bar graph cannot exceed the bounds of
this imaginary rectangle.
Colour 3 Integer 1 0-255 8 Bar graph fill and border colour.
Target line 4 Integer 1 0-255 9 Target line colour (if drawn).
colour
Options 5 Bitmask 1 0-63 10 Logical bits to indicate which parts to draw:
1 = TRUE
Bit 0 = Draw border
Bit 1 = Draw target line
Bit 2 = Draw ticks
Bit 3 = Bar graph type. If this bit is FALSE (0),
bar graph is filled. If this bit is TRUE (1), Bar
graph is not filled but rather shows the current
value as a single line at the proper position
within the bar graph.
Orientation and direction of the bar graph:
Bit 4 = Axis orientation. 0 = vertical (increasing
values move parallel to the Y axis with constant
X), 1 = horizontal (increasing values move
parallel to the X axis with constant Y)

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Bit 5 = Direction. 0 = Grows negative (left or
down). 1 = Grows positive (right or up).
Number of ticks 6 Integer 1 0-255 11 Number of ticks to draw along bar graph. If one
tick, it is drawn in the middle of the bar graph.
For two or more ticks a tick is placed at each
end of the bar graph and the rest are evenly
spaced between them.
Min value 7 Integer 2 0-65535 12-13 Minimum value.
Max value 8 Integer 2 0-65535 14-15 Maximum value.
Variable 9 Integer 2 0-65534, 16-17 Object ID of a Number Variable object in which
reference 65535 to retrieve the bar graph’s value. If this attribute
is set to NULL, the value is retrieved directly
from the value attribute instead.
The referenced Number Variable’s value shall
be in the range 0-65535.
Value [12] Integer 2 0-65535 18-19 Current value. Used only if variable reference is
NULL. Bar graph fills or moves, depending on
bar graph type, to a point calculated from this
value and min/max values. If value > Max value
or value < Min value, the bar graph is filled or
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shown empty and no error is generated by the

VT.
Target value 10 Integer 2 0-65534, 20-21 Object ID of a Number Variable object in which
variable 65535 to retrieve the bar graph’s target value. If this
reference attribute is set to NULL, the target value is
retrieved directly from the Target value attribute
instead.
The referenced Number Variable’s value shall
be in the range 0-65535.
Target value 11 Integer 2 0-65535 22-23 Current target value. Used only if Target value
variable Reference attribute is NULL. Target
value is displayed as a line on the bar graph to
indicate some target or warning level. If Target
value > Max value or Target value < Min value,
the target line is shown on one of the ends of
the bar graph and no error is generated by the
VT.
Number of Integer 1 0-255 24 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 25… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
{Macro ID} Integer 1 0-255 26… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.11.4 Output Arched Bar Graph object

This object is similar in concept to a linear bar graph but appears arched. Arched bar graphs are drawn about
an Output Ellipse object enclosed within a defined rectangle. The indicated angles are computed from the
positive X axis in a mathematically positive direction (anticlockwise). The position attribute of the bar graph (in
the parent object) always refers to the upper left-hand corner of the enclosing rectangle regardless of
orientation. This object is drawn transparent so that objects can be placed underneath to enhance the
appearance.

A Change Size command can cause the “bar graph width” attribute to equal or exceed one half the width or
height of the object, however this shall not be cause for pool rejection. The VT may reduce the “bar graph
width” value for the purpose of drawing this object. The reduced value is only to supporting drawing the object
and shall not be stored in the object.

See Figure B.12 — Output Arched Bar Graph object — example and Table B.38 — Output Arched Bar Graph
events and Table B.39 — Output Arched Bar Graph attributes and record format.

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 ISO 11783-6:2014(E)

Key
1 start angle 6 border
2 end angle 7 bar graph width
3 value a Enclosing rectangle. Bar graph cannot exceed
4 maximum value boundaries of this rectangle.
5 minimum value b In this example, bar graph deflection is clockwise
c Visual elements outside the range of start angle to end
angle are shown for clarity, but would not be drawn

Figure B.12 — Output Arched Bar Graph object — example

Allowed Commands:

⎯ Change Numeric Value command;

⎯ Change Attribute command;

⎯ Change Size command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.38 — Output Arched Bar Graph events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
Refresh for caused —
by conditions

134
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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

On Change Change Numeric Redraw this object, refresh parent mask. Change Numeric Value response
Value Value command
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.39 — Output Arched Bar Graph attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =19 3 Object Type = Output Arched Bar Graph
Width 1 Integer 2 0-65535 4-5 Maximum width of the enclosing rectangle in
pixels. Bar graph cannot exceed the bounds of
this imaginary rectangle.
Height 2 Integer 2 0-65535 6-7 Maximum height of the enclosing rectangle in
pixels. Bar graph cannot exceed the bounds of
this imaginary rectangle.
Colour 3 Integer 1 0-255 8 Bar graph fill and border colour.

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Target line 4 Integer 1 0-255 9 Target line colour (if drawn).
colour
Options 5 Bitmask 1 0-31 10 Logical bits to indicate which parts to draw.
1 = TRUE.
Bit 0 = Draw border
Bit 1 = Draw a target line
Bit 2 = Undefined, set to 0 recommended
Bit 3 = bar graph type. If this bit is FALSE (0),
bar graph is filled. If this bit is TRUE (1), the bar
graph is not filled but rather shows the current
value as a single line at the proper position
within the bar graph.
Bit 4 = Deflection of the bar graph around the
arc. 0 = anticlockwise and 1 = clockwise
Start angle 6 Integer 1 0-180 11 Start angle/2 (in degrees) from positive X axis
anticlockwise (90° is straight up). Start and end
angles define the arc. If the start and end
angles are the same, the bar graph’s arc is
closed (360°).
End angle 7 Integer 1 0-180 12 End angle/2 (in degrees) from positive X axis
anticlockwise (90° is straight up). Start and end
angles define the arc. If the start and end
angles are the same, the bar graph’s arc is
closed (360°).
Bar graph width 8 Integer 2 0-65535 13-14 Bar graph width in pixels. Bar graph width
should be less than half the total width, or less
than half the total height, whichever is least.
(See Figure B.12 — Output Arched Bar Graph
object — example)
Min value 9 Integer 2 0-65535 15-16 Minimum value.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Max value 10 Integer 2 0-65535 17-18 Maximum value.
Variable 11 Integer 2 0-65534, 19-20 Object ID of a Number Variable object in which
reference 65535 to retrieve the bar graph’s value. If this attribute
is set to NULL, the value is retrieved directly
from the value attribute instead.
The referenced Number Variable’s value shall
be in the range 0-65535.
Value [14] Integer 2 0-65535 21-22 Current value. Used only if variable Reference
attribute is NULL. Bar graph fills or moves,
depending on bar graph type, to a point
calculated from this value and min/max values.
If value > Max value or value < Min value, the
bar graph is filled or shown empty and no error
is generated by the VT.
Target value 12 Integer 2 0-65534, 23-24 Object ID of a Number Variable object in which
variable 65535 to retrieve the bar graph’s target value. If this
reference attribute is set to NULL, the target value is
retrieved directly from the Target value attribute
instead.
The referenced Number Variable’s value shall
be in the range 0-65535.
Target value 13 Integer 2 0-65535 25-26 Current target value. Used only if target value
variable Reference attribute is NULL. Target
value is displayed as a line on the bar graph to
indicate some target or warning level. If Target
value > Max value or Target value < Min value,
the target line is shown on one of the ends of
the bar graph and no error is generated by the
VT.
Number of Integer 1 0-255 27 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 28… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 29… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

136
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 ISO 11783-6:2014(E)

B.12 Picture Graphic object

B.12.1 General

This object displays a picture graphic (bitmap). The VT shall scale the picture graphic from the actual width
and height to the target width and calculated target height. See Table B.40 — Picture Graphic events and
Table B.41 — Picture Graphic attributes and record format.

Allowed Command:

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.40 — Picture Graphic events

Event Caused by VT behaviour Message

On Refresh A change in the Redraw this object.
Opaque/Transparen
t or the Flashing
Option bits —
Also see Data Mask
Refresh for caused
by conditions
On Change Change Attribute Redraw this object, refresh parent mask. Change Attribute response
Attribute command

Table B.41 — Picture Graphic attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =20 3 Object Type = Picture Graphic
Width 1 Integer 2 0-65535 4-5 Target width in pixels of the picture graphic. The
height of the picture graphic is calculated from
the Actual width/Height and this attribute to
keep the same aspect and avoid distortion.
Actual width [4] Integer 2 0-65535 6-7 Actual width in pixels of the picture graphic raw
data. VT shall scale the graphic to the size
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given by the width attribute.

Actual height [5] Integer 2 0-65535 8-9 Actual height in pixels of the picture graphic raw
data. VT shall scale the graphic to the size
given by the width attribute.
Format [6] Integer 1 0-2 10 Picture graphic type:
0 = Monochrome; 8 pixels per byte. Each bit
represents a colour palette index of 0 or 1.
(“White” colour can vary with display hardware)
1 = 4 bit colour; 2 colour pixels per byte. Each
nibble (4 bits) represents a colour palette index
of 0 through 15.
2 = 8 bit colour; 1 colour pixel per byte. Each

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
byte represents a colour palette index of 0
through 255.
See Table A.4 — Standard VT RGB colour
palette.
Options 2 Bitmask 1 0-7 11 Bit 0: 0 = Opaque, 1 = Transparent. If opaque,
all pixels are drawn in indicated colour.
Background objects do not show through. If
transparent, pixels in the bitmap that have the
transparency colour should show the colour of
the background or objects underneath this
picture graphic instead.
Bit 1: 0 = Normal, 1 = Flashing. Flash style and
rate determined by VT design.
Bit 2: 0 = Raw data, 1 = Run-Length Encoded
data (See Clause B.12.2 Picture Graphic object
raw data format and compression). This bit
cannot be changed during runtime by Change

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Attribute command. (Any change will be ignored
by the VT.)
Transparency 3 Integer 1 0-255 12 Pixels in the bitmap that have this colour index
colour are transparent (background shows through).
Number of bytes Integer 4 0 to 13-16 Number of bytes in the raw data.
in raw data 2^32-1
Number of Integer 1 0-255 17 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 18… Raw bytes of graphic data. Bytes shall be
{raw data} interpreted according to the format and options
attributes. For an explanation of raw data
format, (See Clause B.12.2 Picture Graphic
object raw data format and compression)
If monochrome bitmap, each byte contains the
colour indices for 8 pixels beginning at the left
with the most significant bit.
If 4-bit colour bitmap, each byte contains the
colour indices for two pixels beginning at the left
with the most significant nibble.
If 8-bit colour bitmap, each byte contains the
colour index for one pixel.
Bitmap data is always interpreted left to right,
top to bottom of the display. Unused bits at the
end of a line are ignored.
Repeat: Integer 1 0-255 Depends (List these after all objects have been listed.)
{Event ID} on size of 8-bit Macro Object ID reference: Event ID of
bitmap event type that causes this Macro to execute.
data 16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 Depends 8-bit Macro Object ID reference: Macro ID of the
on size of Macro to execute.
bitmap 16-bit Macro Object ID reference (only for VT
data version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.12.2 Picture Graphic object raw data format and compression

The raw data attribute of the Picture Graphic object contains pixel information line by line, left to right and
downwards. If the width of the object is such that the data does not end evenly at the end of a byte, the
unused portion of the byte at the end of each line is filled with pixel values equal to zero (0). The VT ignores
unused parts of a byte at the end of a line.

Example If the size of the object is 10 pixels wide by two lines high, the format is monochrome and each line is
filled with white coloured pixels. The unused 6 bits in the second byte of each line would be filled with zero and the raw
data would be FF16,C016,FF16,C016. Similar logic is applied for four-bit colour graphics where, if the width is odd, the least
significant nibble of the last byte on each line is set to zero.

If the data is longer than expected after all of the rows and columns of pixels have been defined, then the VT
shall ignore all extra data bytes. However, if the data is shorter than expected leaving some pixels undefined,
then the VT shall report an error to the Working Set. This error shall be reported with either the End of Object
Pool response (See Clause C.2.5) or the VT Change Active Mask message (See Clause H.14).

In order to reduce the amount of data transmitted by the Working Set and maintained by the VT it is
recommended that the smallest version of a picture graphic be transmitted. Therefore, a run-length encoding
scheme may be used to compress the picture graphic data. Care should be taken by Working Set designers
as this algorithm can actually increase the size of the picture graphic data when the object is complex. In this
case, it is recommended that raw data be transmitted instead and Bit 2 of the options attribute should be
cleared.

The compression algorithm is simple and works as follows. Data is transmitted in two-byte pairs with the first
byte representing the number of times the value byte repeats and the second byte representing the value to
repeat. For example, for a raw data sequence of 0,0,0,0,0,0,3,3,3,1,1,2, the compressed data would be
transmitted as 6,0,3,3,2,1,1,2. This example gives a compression of 33 %. If the first byte in a pair has the
value zero, the second byte is ignored.

The run-length algorithm is chosen because picture graphic data can be easily compressed and
uncompressed in real time without the need for a buffer in the VT.

B.13 Variable objects

B.13.1 General

Variables are used to store a value that can be referenced and used by other objects. There are two types of
variable object: number and string. Variables are referenced only, never directly included as a child in a parent
object. See Table B.42 — Variable events.

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 ISO 11783-6:2014(E)

Table B.42 — Variable events

Event Caused by VT behaviour Message

On Change Change Numeric Redraw all objects that are currently displayed Change Numeric Value response
Value Value command or and reference this object. Refresh parent object. or Change String Value response
Change String
Value command

B.13.2 Number Variable object

A number variable holds a 32-bit unsigned integer value. See Table B.43 — Number Variable attributes and
record format.

Allowed Commands:

⎯ Change Numeric Value command (Number Variable object only);

⎯ Get Attribute Value message (VT version 4 and later).

Table B.43 — Number Variable attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =21 3 Object Type = Number Variable
Value [1] Integer 4 0 4-7 32-bit unsigned integer value.
to
2^32-1

B.13.3 String Variable object

A String Variable holds a fixed length string. Strings shorter than the length attribute should be padded with
space characters. The maximum length attribute cannot be changed once the variable has been defined. See
Table B.44 — String Variable attributes and record format.

Allowed Commands:
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

⎯ Change String Value command (String Variable object only) ;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.44 — String Variable attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Type [0] Integer 1 =22 3 Object Type = String Variable
Length Integer 2 0-65535 4-5 Maximum fixed length of the string value in
bytes.
Value String 6… String of characters. Pad with spaces as
necessary to satisfy length attribute.
The text string can be 8-bit or WideString (See
Clause 4.6.19.7 String encoding).
The Working Set can cause the type to change
from an 8-bit String to a WideString or vice
versa.

B.14 Attribute objects

B.14.1 General

Attribute objects are used to hold common attributes for other objects. Attribute objects are referenced only,
never directly included as a child in a parent object. There are four types of attribute object: font, line, fill and
input. See Table B.45 — Font Attributes events and Table B.46 — Font Attributes attributes and record
format.

B.14.2 Font Attributes object

This object holds attributes related to fonts.

The Working Set designer can change the Font Attributes using either the Change Font Attributes command,
the Change Attribute command, or by transferring a new object. The designer should be aware that some
uses of the Change Attribute command may cause the object pool to become invalid (e.g. if the Font size and
Font style attributes are changed to a combination that the VT does not support). The Change Font Attributes
command may be used to achieve the desired results without the invalid pool condition.

Allowed Commands:

⎯ Change Font Attributes command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.45 — Font Attributes events

Event Caused by VT behaviour Message

On Change Change Font Redraw all objects that are currently displayed Change Font Attributes response
Font Attributes Attributes command and reference this object. Refresh parent object.
On Change Change Attribute Redraw all objects that are currently displayed Change Attribute response
Attribute command and reference this object. Refresh parent object.
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 ISO 11783-6:2014(E)

Table B.46 — Font Attributes attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =23 3 Object Type = Font Attributes
Font colour 1 Integer 1 0-255 4 Text colour.
a
Font size 2 Integer 1 0 – 14 5 Font size
If Non-Proportional Font (refer to Font style bit
0-14 or 7)
8-N
c Font size value = pixel width x pixel height
0=6×8
1=8×8
2 = 8 × 12
3 = 12 × 16
4 = 16 × 16
5 = 16 × 24
6 = 24 × 32
7 = 32 × 32
8 = 32 × 48
9 = 48 × 64
10 = 64 × 64
11 = 64 × 96
12 = 96 × 128
13 = 128 × 128
14 = 128 × 192

If Proportional font (refer to font style bit 7):

8 to N
This attribute represents the height of the font in
pixels in the range 8 up to and including the
value N, where N is the largest supported font
height as identified in this Font size value of Get
Text Font Data response. Width of each
c
character is variable.
a
Font type 3 Integer 1 0, 1, 255 6 0 = ISO8859-1 (ISO Latin 1)
1 = ISO8859-15 (ISO Latin 9)
b
0-255
c 2 = ISO8859-2 (ISO Latin 2)
3 = Reserved
b
4 = ISO8859-4 (ISO Latin 4)
b
5 = ISO8859-5 (Cyrillic)
6 = Reserved
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b
7 = ISO8859-7 (Greek)
8 – 239 Reserved
b
240 – 254 = Proprietary
255 = Proprietary
If the Font Attributes object applies to a
WideString the Font type is ignored (See Clause
4.6.19.7 String encoding)
a
Font style 4 Bitmask 1 0-127 7 Font style. These may be combined.
0 = Normal Text (default)
0-255
c Bit 0 = 1 = Bold
Bit 1 = 1 = Crossed Out
Bit 2 = 1 = Underlined

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Bit 3 = 1 = Italic
d
Bit 4 = 1 = Inverted
Bit 5 = 1 = Flashing between Inverted and styles
set by bits 0-3
Bit 6 = 1 = Flash both the background and the
foreground between Hidden and styles set by
bits 0-4. Bit 6 has priority over bit 5.
In other words, the entire text object is hidden
on the 'hidden' cycle.
Bit 7 = 1 = Proportional font rendering (if this bit
c
is zero, use non-proportional font rendering).
Number of Integer 1 0-255 8 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 9… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 10… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)
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a
VT Version 3 and Prior
b
For version 3 and prior VTs, these font types were undefined
c
For version 4 and later VTs
d
Inverting is to exchange background and pen colours. The rules for background transparency shall be applied.

B.14.3 Line Attributes object

This object holds Line Attributes related to output shape objects. See Table B.47 — Line Attributes events and
Table B.48 — Line Attributes attributes and record format and Figure B.14 — Effect of Line Attribute —
example pattern: 1010….

NOTE The end point of a line can be calculated, but may not be drawn when the Line Attribute is applied.

Allowed Commands:

⎯ Change Line Attributes command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

Table B.47 — Line Attributes events

Event Caused by VT behaviour Message

On Change Line Change Line Redraw all objects that are currently displayed Change Line Attributes response
Attributes Attributes command and reference this object. Refresh parent object.
On Change Change Attribute Redraw all objects that are currently displayed Change Attribute response
Attribute command and reference this object. Refresh parent object.

Table B.48 — Line Attributes attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =24 3 Object Type = Line Attributes
Line colour 1 Integer 1 0-255 4 Pen colour.
Line width 2 Integer 1 0-255 5 Pen thickness in pixels. Lines are drawn with a
square paintbrush of this size. See
Figure B.13 — Effect of Line Attribute - example
of same line art with different width

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Line art 3 Bitmask 2 0-65535 6-7 Bit pattern art for line. Each bit represents a
paintbrush spot. Zero (0) bits are skipped
(background colour) and one (1) bits are drawn
in the line colour. Each bit is the size of the
current paintbrush. For example, 00110011
would represent two skipped paintbrush spots
followed by two paintbrush spots drawn and so
on. See Figure B.14 — Effect of Line Attribute
— example pattern: 1010…

Number of Integer 1 0-255 8 Number of Macro references included even if

macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 9… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 10… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)

Key:
a Output Line object (width=16, height=1, line attribute: line width=1, line attribute: line art=DC5316)
b Line Attribute binary value superimposed above the rendered Output Line object to show relationship
c Most significant bit of line attribute
d Least significant bit of line attribute
e Output Line object (width=32, height =2, line attribute: line width=2, line attribute: line art=DC5316)

Figure B.13 — Effect of Line Attribute - example of same line art with different width

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Figure B.14 — Effect of Line Attribute — example pattern: 1010…

B.14.4 Fill Attributes object

This object holds attributes related to filling output shape objects. See Table B.49 — Fill Attributes events and
Table B.50 — Fill Attributes attributes and record format.
Allowed Commands:

⎯ Change Fill Attributes command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

Table B.49 — Fill Attributes events

Event Caused by VT behaviour Message

On Change Fill Change Fill Redraw all objects that are currently displayed Change Fill Attributes response
Attributes Attributes command and reference this object. Refresh parent object.
On Change Change Attribute Redraw all objects that are currently displayed Change Attribute response
Attribute command and reference this object. Refresh parent object.

Table B.50 — Fill Attributes attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =25 3 Object Type = Fill Attributes
Fill type 1 Integer 1 0-3 4 0 = no fill
1 = fill with line colour
2 = fill with specified colour in fill colour attribute
3 = fill with pattern given by fill pattern attribute
Fill colour 2 Integer 1 0-255 5 Colour for fill if Fill type = 2. Ignored for all other
Fill type values.
Fill pattern 3 Integer 2 0-65534, 6-7 Object id of a Picture Graphic object to use as a
65535 Fill pattern. Ignored if Fill type <> 3. To change
from Fill Type 0, 1 or 2 to Fill Type 3, the
Working Set shall modify the Fill Pattern
attribute first and the Fill Type attribute second
to avoid errors in the VT. If this order is not
followed, the behavior of the VT cannot be
predicted and is proprietary. If the Fill Type is 3
and the Fill Pattern attribute is the NULL, no fill
shall be performed by the VT.
IMPORTANT – In order to simplify monochrome
and 16-colour VT design, Picture Graphic
objects used as a pattern buffer shall have a
width that is integer divisible by 8 (i.e. the
pattern cannot end somewhere in the middle of
a byte).
If this width is not byte divisible, the VT shall
report an error to the Working Set. This error
shall be reported with either the End of Object
Pool response (See Clause C.2.5) or the VT
Change Active Mask (See Clause H.14).
Number of Integer 1 0-255 8 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
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references within the context of this attribute.

Repeat: Integer 1 0-255 9… (List these after all objects have been listed.)
{Event ID} 8-bit Macro Object ID reference: Event ID of

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Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 10… 8-bit Macro Object ID reference: Macro ID of the
Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.14.5 Input Attributes object

This object defines the valid or invalid characters for an

Input String object. The VT shall check this object for valid characters and not permit operator entry of invalid
characters into the input field. This object is referenced by an

Input String object. See Table B.51 — Input Attributes events and Table B.52 — Input Attributes attributes and
record format.

If the

Input String object which references this object does not contain an 8-bit string, or the

Input String object references a String Variable that does not contain an 8-bit string, then no validation shall be
performed.

Allowed Commands:

⎯ Change String Value command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.51 — Input Attributes events

Event Caused by VT behaviour Message

On Change Change String Redraw all objects that are currently displayed
Change String Value response
Value Value command and reference this object. Refresh parent object.
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 ISO 11783-6:2014(E)

Table B.52 — Input Attributes attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =26 3 Object Type = Input Attributes
Validation type [1] Integer 1 0-1 4 0 = valid characters are listed
1 = invalid characters are listed
Length Integer 1 0-255 5 Length of validation string in bytes
The Validation String shall be an 8-bit String.
Validation string String 6… String containing all valid or invalid character
codes (depends on validation type attribute).
Number of Integer 1 0-255 Depends Number of Macro references included even if
macros to follow on size of zero. Each Macro reference consists of 2 bytes:
string one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 1 0-255 Depends (List these after all objects have been listed.)
{Event ID} on size of 8-bit Macro Object ID reference: Event ID of
string event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 Depends 8-bit Macro Object ID reference: Macro ID of the
on size of Macro to execute.
string 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

B.14.6 Extended Input Attributes object

The Extended Input Attributes object, available in VT version 4 and later, defines the valid or invalid
characters for an

Input String object. The VT shall check this object for valid characters and not permit operator entry of invalid
characters into the input field. This object is referenced by an

Input String object. See Table B.53 — Extended Input Attributes attributes and record format.

If the

Input String object which references this object does not contain a WideString, or the

Input String object references a String Variable object that does not contain a WideString, then no validation
shall be performed.

The character ranges defined in this object may include characters which are not supported by the VT. The
VT shall ignore the unsupported characters but still validate against the remaining characters.

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 ISO 11783-6:2014(E)

Allowed Command:

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

Table B.53 — Extended Input Attributes attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =38 3 Object Type = Extended Input Attributes
Validation type [1] Integer 1 0-1 4 0 = valid characters are listed
1 = invalid characters are listed
Number of code Integer 1 1-17 5 Number of code planes with valid/invalid
planes to follow characters.
For each code plane the plane number and an
array of character ranges are listed.
Repeat: Integer 1 0-16 6… Code plane to which the character ranges
{Code plane belong.
number} 0 : characters 0000016..0FFFF16
1 : characters 1000016..1FFFF16
2 : characters 2000016..2FFFF16
etc.
{Number of integer 1 1-255 7.. Number of character ranges. Each character
character range consists of two WideChars (first character
ranges to follow} and last character where the first character <=
last character).
Depending on validation type (byte 4) the
ranges indicate either valid or invalid
characters.
Repeat: integer 2 0-65535 8.. First character in the range.
{{First
character}}
{{Last integer 2 0-65535 10.. Last character in the range.
character}}

Example An Extended Input Attribute object (object id 123416) limiting the input characters to the following ranges:

0004116-0004F16 ; Code plane 0

0006116-0006F16 ; Code plane 0
1AB1216-1AB1F16 ; Code plane 1

The object shall be encoded as follows:

3416, 1216, ; object id

2616, ; Type
0016, ; validation type
0216, ; Two code planes
0016, ; Code plane 0
0216, ; Two character ranges
4116, 0016, 4F16, 0016, ; Range 1
6116, 0016, 6F16, 0016, ; Range 2
0116, ; Code plane 1
0116, ; One character range
1216, AB16, 1F16, AB16, ; Range 1

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 ISO 11783-6:2014(E)

B.15 Object Pointer object

Refer to clause 4.6.11.5 Object pointer for information on this object. See Table B.54 — Object Pointer events
and Table B.55 — Object Pointer attributes and record format.

Allowed Commands:

⎯ Change Numeric Value command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.54 — Object Pointer events

Event Caused by VT behaviour Message

On Change Change Numeric Hide the prior object and show the new one. Change Numeric Value response
Value Value command Refresh the parent object

Table B.55 — Object Pointer attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =27 3 Object Type = Object Pointer object
Value [1] Integer 2 0-65534, 4-5 Object ID of a referenced object or the NULL
65535 Object ID.

B.16 Macro object

Macros are used to define a list of commands that can be referenced by an event or executed using the
Execute Macro command (on version 4 or later VTs) or the Execute Extended Macro command(on version 5
and later VTs). A Macro is defined by a series of one or more command packets. (See Clause 4.6.11.4
Macros)

It is the Working Set responsibility to ensure that the macros, prior to execution, are consistent with the object
pool (e.g. cannot reference missing objects).

NOTE Command packets are defined in Annex F but not all commands are allowed in a Macro.

See Table B.56 — Macro attributes and record format.

Allowed Commands:

⎯ Execute Macro command (VT version 4 and later);

⎯ Execute Extended Macro command (VT version 5 and later);

⎯ Get Attribute Value message (VT version 4 and later).

© ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

Table B.56 — Macro attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
a
Object ID Integer 2 0-255 1-2 Object identifier. Shall be unique within the
b
0-65534 object pool.
Type [0] Integer 1 =28 3 Object Type = Macro
Number of bytes Integer 2 0-65535 4-5 Number of bytes to follow.
to follow For each command, if the command packet is
less than 8 bytes (e.g. Change String Value
command on a two byte string), the remaining
bytes shall be set to FF16 to pad the packet to
an 8 byte boundary.
Repeat: 6-n Command message packets with each packet
{Command} making up a command. Only commands listed
in Annex F are allowed. Use formats from
Annex F.
a
VT version 4 and prior
b
VT version 5 and later

B.17 Colour Map object

The Colour Map object, optionally available in VT version 4 and later, allows the Working Set designer to alter
the transformation of the VT colour index values to the defined RGB value. This provides a mechanism where
the colours table can be changed at run-time. A Working Set, in using a few colour objects for various
backgrounds and borders can then easily alter the presentation.

The object pool may contain more than one Colour Map object. After the pool is loaded the VT uses the
default Colour Map. Upon receipt of a valid Select Colour Map command the VT changes the active palette for
this Working Set. Every object of a Working Set's pool shall be displayed with that Working Set's Colour Map.

The Colour Map object contains the definitions for each of the valid colour index values. Upon selection of a
Colour Map, the resulting Colour Map values shall be valid for the VTs capabilities or the VT will indicate the
failure in the Select Colour Map response message. Therefore, a monochrome VT maintains two entries in the
Colour Map object, where a 256 colour VT maintains 256 entries in the Colour Map object. The Colour Map
object may have capabilities beyond the VT (e.g. a 256 entry Colour Map object may be uploaded for a 2-
colour VT, which will only access indices 0 and 1), but the Colour Map object shall not have fewer colour
indices than the VT capabilities.

A typical VT implementation defines the default palette as shown in Table A.4 — Standard VT RGB colour
palette. The subscript into this array of values is the colour index. The Colour Map object provides one level of
indirection to the RGB table. Figure B.15 — Colour Map object reverses colours – example shows a sample
presentation before and after colours 0 and 1 have been reversed by selecting a Colour Map object with the
values [1, 0, …].

Allowed Command:

⎯ Get Attribute Value message (VT version 4 and later).

--```,`,`,,``,,````,,,,,``,`,,-

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 ISO 11783-6:2014(E)
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Key
1 VT colour index 4 R,G,B value
2 Colour map 5 Example graphic
3 Palette index

Figure B.15 — Colour Map object reverses colours – example

Table B.57 — Colour Map attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =39 3 Object Type = Colour Map
Number of Integer 2 2, 16, 256 4-5 Indicates the number of Colour Map entries to
colour indexes follow. Allowable values:
to follow 2 for a VT with graphic type 0 (monochrome)
16 for a VT with graphic type 1 (16 colour)
256 for a VT with graphic type 2 (256 colour)

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Colour Map Integer variable 0-255 6-n VT Colour to be shown for VT colour index
values
VT graphic type 0:
length = 2 for colour index 0, 1
VT graphic type 1:
length = 16 for colour index 0 – 15
VT graphic type 2:
length = 256 for colour index 0 - 255

B.18 Graphics Context object

The Graphics Context Object, optionally available in VT version 4 and later, is a bitmap with a canvas and a
viewport that can be manipulated by the Working Set at run time. The canvas of the object (the drawing area)
can be changed and is remembered by the object even when it is not physically on the screen. In other words,
this object has a memory and the pixels of the canvas persist even when the object is removed from the
display or another mask is selected. This allows a Working Set to do run-time drawing to the VT screen. This
would be useful for precision farming applications, where, for example, the designer could draw a swath
behind the moving implement image.
The memory required for the object’s bitmapped contents can be directly calculated from the canvas size.
Changes to the canvas size are not permitted unless an entirely new object is uploaded. The “viewport”
defines the portion of the canvas that is visible and thus the display size of the VT object (i.e. on a Data
Mask). By anchoring the viewport as a child object in the parent mask or container, it is possible to easily and
efficiently pan the underlying object contents within the viewport. The size of the viewport can be modified at
run-time.
The contents of this object are never stored by the Store Version command. Working Sets may copy the
canvas to a Picture Graphic before storing a version of the object pool if it is desired to store what was drawn.
A single Graphics Context command with several sub-commands is defined to allow simple, consistent and
efficient modification of the contents of the graphics Context. The Graphics Context commands can also be
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contained within a Macro to permit even more efficient updates. Most commands can be carried by one CAN
packet.
The current drawing Context, or attributes of the Graphics Context object are always remembered. Therefore
it is only necessary to set an attribute once when it is intended to be used more than once (refer to example
below). A graphics cursor is defined to indicate the next X/Y location at which to start drawing. Graphics
commands can move the graphics cursor to a new location. Therefore drawing can be thought of as a set of
procedural commands as shown in Figure B.16 — Example drawing with Graphics Context object.

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 ISO 11783-6:2014(E)

Instructions Graph Result

SET FOREGROUND COLOUR (Colour=0 (black))

SET BACKGROUND COLOUR (Colour=1 (white))
SET LINE ATTRIBUTES (object id 6019)
SET FILL ATTRIBUTES (NULL Object ID)
SET GRAPHICS CURSOR (X=0, Y=0)
ERASE RECTANGLE (width=30, height=30)
SET GRAPHICS CURSOR (X=0, Y=0)
DRAW LINE (Xoff=0, Yoff=20)
DRAW LINE (Xoff=20, Yoff=0)
MOVE GRAPHICS CURSOR (Xoff=-20, Yoff=0)
SET FOREGROUND COLOUR (Colour=12 (red))
DRAW LINE (Xoff=6, Yoff=-6)
DRAW LINE (Xoff=8, Yoff=0)
DRAW LINE (Xoff=6, Yoff=-6)
SET GRAPHICS CURSOR (X=3, Y=0)
SET FONT ATTRIBUTES (object id 2000)
DRAW TEXT (Transparent, 13, "Graph Example")

Figure B.16 — Example drawing with Graphics Context object

The Graphics Context object has a transparency option, similar to the Picture Graphic object. Therefore it is
possible to create graphics ‘layers” by overlaying two or more Graphics Context Objects. This allows easy
removal or erasure of certain groups of pixels in the object(s). For example, swath lines could be reset without
affected the underlying map image. However, Working Set designers should be cautioned that the Graphics
Context object will likely allocate significant memory in the VT (Canvas Width times Canvas Height or more
bytes on a 256 colour VT) and should therefore be used sparingly and kept small to avoid rejection of the pool
due to memory constraints.

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 ISO 11783-6:2014(E)

Key
1 Picture graphic object
2 Viewport
3 Graphics context object (entire graphics context referred to as the ‘canvas’)

Figure B.17 — Example application of the Graphics Context object and viewport

Allowed Commands

⎯ Graphics Context command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.58 — Graphics Context events

Event Caused by VT behaviour Message

On Change Attribute Change Attribute command If field is visible, refresh. Change Attribute
response
On Change Background Change Background Colour Fill the object with the background Change Background
Colour command colour Colour response

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 ISO 11783-6:2014(E)

Table B.59 — Graphics Context attributes and record format

Attribute Name AID Type Size Range or Record

(bytes) Value Byte Description
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =36 3 Object Type = Graphics Context Object (version
4 or later VTs only)
Viewport Width 1 Integer 2 0 – 32767 4-5 Width of the visible viewport in pixels.
Viewport Height 2 Integer 2 0 – 32767 6-7 Height of the visible viewport in pixels.
Viewport X 3 Integer 2 -32768 8-9 X Position of the upper left corner of the
to viewport relative to the upper left corner of the
+32767 canvas. The viewport is not constrained to the
dimensions of the canvas. 0 refers to the left
most column of the canvas.
Viewport Y 4 Integer 2 -32768 10-11 Y Position of the upper left corner of the
to viewport relative to the upper left corner of the
+32767 canvas. The viewport is not constrained to the
dimensions of the canvas. 0 refers to the top
most row of the canvas.
Canvas Width [5] Integer 2 0 – 32767 12-13 Width of the canvas in pixels.
Canvas Height [6] Integer 2 0 – 32767 14-15 Height of the canvas in pixels.
Viewport Zoom 7 Float 4 -32,0 to 16-19 Viewport magnification (See Table F.1 —
+32,0 Graphic command summary).
Graphics Cursor 8 Integer 2 -32768 20-21 X Position of the graphics ‘cursor’ relative to the
X to upper left corner of the canvas. Next pixel will
+32767 be drawn at this location.
Graphics Cursor 9 Integer 2 -32768 22-23 Y Position of the graphics ‘cursor’ relative to the
Y to upper left corner of the canvas. Next pixel will
+32767 be drawn at this location.
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Foreground 10 Integer 1 0-255 24 Foreground colour to use during drawing when

Colour options bit 1 is TRUE.
Background 11 Integer 1 0-255 25 Background colour to use during drawing when
Colour options bit 1 is TRUE. At parsing time, this
object is filled with this background colour.
NOTE: Writing this attribute at runtime
shall fill this object, effectively erasing any
content.
Font Attributes 12 Integer 2 0-65534, 26-27 Object ID of a Font Attributes Object to use for
Object 65535 drawing text. Can be set to NULL if text is not
being used.
Line Attributes 13 Integer 2 0-65534, 28-29 Object ID of a Line Attributes Object to use for
Object 65535 drawing lines and borders or NULL for line
suppression.
Fill Attributes 14 Integer 2 0-65534, 30-31 Object ID of a Fill Attributes Object to use for
Object 65535 filling objects or NULL for no filling.

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 ISO 11783-6:2014(E)

Attribute Name AID Type Size Range or Record

(bytes) Value Byte Description
Format 15 Integer 1 0-2 32 Canvas Type:
0 = Monochrome; 8 pixels per byte. Each bit
represents a colour palette index of 0 or 1.
(“White” colour can vary with display hardware)
1 = 4 bit colour; 2 colour pixels per byte. Each
nibble (4 bits) represents a colour palette index
of 0 through 15.
2 = 8 bit colour; 1 colour pixel per byte. Each
byte represents a colour palette index of 0
through 255.
See Table A.4 — Standard VT RGB colour
palette.
Options 16 Bitmask 1 0-3 33 Bit 0: Transparency
0 = Opaque
1 = Transparent. If opaque, all pixels are drawn
in indicated colour. Background objects do not
show through. If transparent, pixels in the
bitmap that have the transparency colour should
show the colour of the background or objects
underneath this object instead.
Bit 1: Colour
0 = Use Foreground and Background Colours of
this object when drawing.
1 = Use Line Colour, Font colour, and Fill
Colour, specified in the Line, Font, and Fill
attributes when drawing.
Bits 2-7 = reserved, set to 0
Transparency 17 Integer 1 0-255 34 Pixels in the bitmap that have this colour index
Colour are transparent (background shows through). If
opaque, this attribute is ignored.

B.19 Window Mask object

B.19.1 General

The Window Mask object, available in VT version 4 and later, is a parent and special mask object that is used
by the VT only in its User-Layout Data Masks. For details, refer to Clause 4.7.1.2 User-Layout Data Mask.

If the Window Mask Window Type is free form (type 0), the Working Set shall scale this object, just as any
other object, to the dimensions of the VT’s Window Cell. The aspect ratio of a Window Cell is predictable
since there are always 12 window cells (2 columns by 6 rows) on each of the VT’s User-Layout Data Masks
which, in turn, are always full mask resolution and square. Therefore, the window Cell Size can be calculated
from the Data Mask size reported by the VT in the Get Hardware response.

Working Sets can participate in the VT’s User-Layout Data Masks, if supported, by placing Window Mask
objects in the object pool.

Allowed Commands:

⎯ Change Background Colour command;

⎯ Change Child Location command;

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 ISO 11783-6:2014(E)

⎯ Change Child Position command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.60 — Window Mask events

Event Caused by VT behaviour Message

On Show A User-Layout Data Fill area with the User-Layout Data Mask VT On User-Layout Hide/Show
Mask containing background colour. Draw child objects in the message with Show indicated
this Window Mask order they are listed in the Window Mask object.
object is displayed
on screen
On Hide A User-Layout Data VT On User-Layout Hide/Show
Mask containing message with Hide indicated
this Window Mask
object is removed
from the screen
On Refresh Any action that Redraw objects in the Window Mask that have
causes a show or become corrupted.
hide on a child, —
grandchild, object,
etc.
On Change Change If the Window Mask is visible and not Change Background Colour
Background Background Colour transparent, fill area with background colour and response
Colour command draw child objects in the order they are listed.
On Change Change Child Draw child object at current location in User- Change Child Location response
Child Location Location command Layout mask background colour to erase it.
Refresh Window Mask (to redraw child object or
objects).
On Change Change Child Draw child object at current location in User- Change Child Position response
Child Position Position command Layout mask background colour to erase it.
Refresh Window Mask (to redraw child object or
objects).
On Change Change Attribute For behaviour see other change commands Change Attribute response
Attribute command above.

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 ISO 11783-6:2014(E)

Table B.61 — Window Mask attributes and record format

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =34 3 Object Type = Window Mask
Width Integer 1 1-2 4 Width (Number of User-Layout Data Mask
columns). Used only if Window Type attribute
is 0 (Free Form).
Height Integer 1 1-6 5 Height (Number of User-Layout Data Mask
rows). Used only if Window Type attribute is
0 (Free Form).
Window Type Integer 1 0-18 6 Window Type (see Clause B.19.2). The
dimensions listed here are width x height in
window cells.
0 = Free Form
1 = 1x1 Numeric Output Value with units
2 = 1x1 Numeric Output Value, no units
3 = 1x1 String Output Value
4 = 1x1 Numeric Input Value with units
5 = 1x1 Numeric Input Value, no units
6 = 1x1 String Input Value

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7 = 1x1 Horizontal Linear Bar Graph
8 = 1x1 Single Button
9 = 1x1 Double Button
10 = 2x1 Numeric Output Value with units
11 = 2x1 Numeric Output Value, no units
12 = 2x1 String Output Value
13 = 2x1 Numeric Input Value with units
14 = 2x1 Numeric Input Value, no units
15 = 2x1 String Input Value
16 = 2x1 Horizontal Linear Bar Graph
17 = 2x1 Single Button
18 = 2x1 Double Button
Background 1 Integer 1 0-255 7 Background colour.
Colour
Options 2 Integer 1 0-3 8 Option bits:
Bit 0 = Available. If 0 (FALSE) this window is
not available for use at the present time, even
though defined. The VT shall not allow the
operator to map it and if already mapped,
shall blank out the window cell(s) that it
occupies.
Bit 1 = Transparent. If this bit is 1, the
background colour attribute shall not be used
and the Window shall be transparent.
Bits 2-7 = Reserved, set to 0.
Name 3 Integer 2 0-65534 9-10 Object ID of an Output String object or an
Object Pointer object that points to an Output
String object that contains the string that
gives a proper name to this object. The VT
may choose to ignore colour and font

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
information and do its own formatting of the
text. The VT shall use this name in its
proprietary mapping screen. The VT shall be
capable of displaying at least 20 characters.
Window Title Integer 2 0-65534, 11-12 Object ID of an Output String object or an
65535 Object Pointer object that points to an Output
String object that contains the string that
supplies window title text. This attribute shall
be required for window types above zero. For
window type zero, this attribute shall be set to
the NULL Object ID. For window types above
zero, the VT may choose to ignore colour and
font information and do its own formatting of
the text.
Window Icon Integer 2 0-65534, 13-14 Object ID of an output object (as specified in
65535 Table A.2 — Allowed hierarchical
relationships of objects, 'Object Label
Graphic Representation' column) that
contains an icon for the window. The VT may
use this when formatting window types above
type zero and may also use it in the
proprietary mapping screen to represent the
window. This attribute shall only be the NULL
if the window type is zero (0). In all other
window types, a window icon object shall be
supplied.
Number of Integer 1 0-2 15 The number of objects needed in a Window
object Mask is variable and dependent upon the
references to window type. This attribute, though redundant
follow with the window type attribute, allows for
future expansion of this object definition and
helps with parsing.
If the window type is zero (free form) this
attribute shall be set to 0. For all other
window types, refer to the tables that follow in
Clause B.19.2.
Each attribute that follows is a two-byte
reference to an object id or the NULL Object
ID.
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Number of Integer 1 0-255 16 Number of objects to follow even if zero. If

objects to the Window Type attribute is not zero, this
follow attribute shall be set to 0. Child objects are
only necessary if the Window Type is Free
Form (0). Each of these objects is
“contained” in this object. Each object
consists of 6 bytes: two (2) for Object ID and
four (4) for location.
Number of Integer 1 0-255 17 Number of Macro references included even if
macros to zero. Each Macro reference consists of
follow 2 bytes: one for event ID and one for Macro
ID. Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a
Macro with 16-bit Object ID shall count as 2

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 ISO 11783-6:2014(E)

Attribute Size Range or Record

AID Type Description
Name (bytes) Value byte
macro references within the context of this
attribute.
Repeat: Integer 2 0-65535 18 + num Object ID of a required object reference for
{Object ID} reference the given window type (see Clause B.19.2).
d objects List all objects before listing macros.
*2
Repeat: Integer 2 0-65534 18 + num Object ID of an object contained in this object
{Object ID} reference (See Clause A.1.3 Object relationships). List
d objects all objects before listing macros.
* 2 + num
child
objects *
6
{X Location} Signed 2 -32768 20 + num Relative X location of the top left corner of the
integer to reference object (relative to the top left corner the
+32767 d objects container object).
*2+
num child
objects *
6
{Y Location} Signed 2 -32768 22 + num Relative Y location of the top left corner of the
integer to reference object (relative to the top left corner of the
+32767 d objects container object).
* 2 + num
child
objects *
6
Repeat: Integer 1 0-255 18 + num (List these after all objects have been listed.)
{Event ID} reference 8-bit Macro Object ID reference: Event ID of
d event type that causes this Macro to execute.
objects*2 16-bit Macro Object ID reference (only for VT
+ num version 5 and later): Event ID of event type
child that causes this Macro to execute or 0xFF
objects*6 (see Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 19 + num 8-bit Macro Object ID reference: Macro ID of
reference the Macro to execute.
d 16-bit Macro Object ID reference (only for VT
objects*2 version 5 and later): Low byte or high byte of
+ num Macro ID of the Macro to execute (see
child Clause 4.6.22.3)
objects*6

162 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

B.19.2 Window Mask Window Types

The Window Mask Type attribute in the Window Mask, along with the object component references in the
object allow the VT to create a uniform look and feel for standardized windows from all Working Sets. In
addition, when the attribute is zero (0 = Free Form) the Working Set may create completely custom
presentation.

B.19.2.1 Free Form Window (0)

When the attribute is 0, the Working Set supplies and positions all child objects contained inside the window.
In this case the Working Set has complete control over the look and feel of the window and the VT shall
render the Window Mask exactly as specified by the child objects, position, size, and transparency attributes
of the Window Mask object and all other formatting attributes.
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 ISO 11783-6:2014(E)

B.19.2.2 1x1 Numeric Output Value Window With Units

Window Type 1

Description This window displays a single numeric output with units of measure in a single
window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Numeric value and units of measure

be Displayed

Number of 2
Object
References

Object #1 – Output Number (for the numeric value)

References
#2 – Output String (for the units of measure)
(in order)

VT Field Window Title: 11 characters

Lengths
Window Value: 5 characters (including decimal place if needed)

Window Units: 5 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,

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 ISO 11783-6:2014(E)

B.19.2.3 1x1 Numeric Output Value Window, No Units

Window Type 2

Description This window displays a single numeric output with no units of measure in a
single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Numeric value

be Displayed

Number of 1
Object
References

Object #1 – Output Number (for the numeric value)

Reference

VT Field Window Title: 11 characters

Lengths
Window Value: 11 characters (including decimal place if needed)

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.19.2.4 1x1 String Output Value Window

Window Type 3

Description This window displays a single string output in a single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to String Value

be Displayed

Number of 1
Object
References

Object #1 – Output String (for the string value)

Reference

VT Field Window Title: 11 characters

Lengths
Window Value: 11 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced object. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.19.2.5 1x1 Numeric Input Value Window With Units

Window Type 4

Description This window displays a single numeric input with units of measure in a single
window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Numeric value and units of measure

be Displayed

Number of 2
Object
References

Object #1 – Input Number (for the numeric value)

References
#2 – Output String (for the units of measure)
(in order)

VT Field Window Title: 11 characters

Lengths
Window Value: 5 characters (including decimal place if needed)

Window Units: 5 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.6 1x1 Numeric Input Value Window, No Units

Window Type 5

Description This window displays a single numeric input with no units of measure in a single
window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Numeric value

be Displayed

Number of 1
Object
References

Object #1 – Input Number (for the numeric value)

Reference

VT Field Window Title: 11 characters

Lengths
Window Value: 11 characters (including decimal place if needed)

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.7 1x1 String Input Value Window

Window Type 6

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Description This window displays a single string input in a single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to String Value

be Displayed

Number of 1
Object
References

Object #1 –
Reference
Input String object (for the string value)

VT Field Window Title: 11 characters

Lengths
Window Value: 11 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.8 1x1 Horizontal Linear Bargraph Window

Window Type 7

Description This window displays a single horizontal linear bargraph in a single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Bar Graph

be Displayed

Number of 1
Object
References

Object #1 – Linear Bar Graph

Reference

VT Field Window Title: 11 characters

Lengths

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall supply a Output Linear Bar Graph object in the horizontal position. The bar
graph should increase from left to right but may increase in either direction.

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.19.2.9 1x1 Single Button Window

Window Type 8

Description This window displays a single Button object in a single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to One Button

be Displayed

Number of 1
Object
References
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Object #1 – Button
Reference

VT Field Window Title: 11 characters

Lengths

VT The VT design is free to format the window as desired, and may ignore colour
Formatting and Font Attributes in the referenced Button object. Field length requirements
and Scaling above shall be met. The VT is free to scale objects, excluding the Window Icon,
if needed or desired but in the case of the Button object shall only maintain or
increase it’s size to avoid clipping child objects.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall also scale the Button object and its children according to these equations:

Button Width = Window Cell Width * 65% (rounded down)

Button Height = Window Cell Height * 57% (rounded down)

Child objects shall be similarly scaled. Due to these requirements, the same
Button object in a Data Mask cannot be used in a Window Mask since the scale
factors are different.

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.10 1x1 Double Button Window

Window Type 9

Description This window displays two Button objects in a single window cell.

Window Window Icon, Window Title. While both are optional, at least one of these items
Designator shall be displayed by the VT.

Required to Two Buttons

be Displayed

Number of 2
Object
References

Object #1 – Button (for the left side button)

References
#2 – Button (for the right side button)
(in order)

VT Field Window Title: 11 characters

Lengths

VT The VT design is free to format the window as desired, and may ignore colour
Formatting and Font Attributes in the referenced Button objects. Field length requirements
and Scaling above shall be met. The VT is free to scale objects, excluding the Window Icon,
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

if needed or desired but in the case of the Button objects shall only maintain or
increase their size to avoid clipping child objects.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall also scale the Button objects and their children according to these
equations:

Button Width = Window Cell Width x 30% (rounded down)

Button Height = Window Cell Height x 57% (rounded down)

Child objects shall also be similarly scaled. Due to these requirements, the
same Button object in a Data Mask cannot be used in a Window Mask since the
scale factors are different.

Example
Layout

This figure is an example that shows all components of the window. VT designs
control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.11 2x1 Numeric Output Value Window With Units

Window Type 10

Description This window displays a single numeric output with units of measure in two
horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Numeric value and units of measure

be Displayed

Number of 2
Object
References

Object #1 – Output Number (for the numeric value)

References
#2 – Output String (for the units of measure)
(in order)

VT Field Window Title: 20 characters

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Lengths
Window Value: 10 characters (including decimal place if needed)

Window Units: 9 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.12 2x1 Numeric Output Value Window, No Units

Window Type 11

Description This window displays a single numeric output with no units of measure in two
horizontal window cells.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Numeric value

be Displayed

Number of 1
Object
References

Object #1 – Output Number (for the numeric value)

Reference

VT Field Window Title: 20 characters

Lengths
Window Value: 20 characters (including decimal place if needed)

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.13 2x1 String Output Value Window

Window Type 12

Description This window displays a single string output in two horizontal window cells.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to String Value

be Displayed

Number of 1
Object
References

Object #1 – Output String (for the string value)

Reference

VT Field Window Title: 20 characters

Lengths
Window Value: 20 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.14 2x1 Numeric Input Value Window With Units

Window Type 13

Description This window displays a single numeric input with units of measure in two
horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Numeric value and units of measure

be Displayed
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Number of 2
Object
References

Object #1 – Input Number (for the numeric value)

References
#2 – Output String (for the units of measure)
(in order)

VT Field Window Title: 20 characters

Lengths
Window Value: 10 characters (including decimal place if needed)

Window Units: 9 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.15 2x1 Numeric Input Value Window, No Units

Window Type 14

Description This window displays a single numeric input with no units of measure in two
horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Numeric Value

be Displayed

Number of 1
Object
References

Object #1 – Input Number (for the numeric value)

Reference

VT Field Window Title: 20 characters

Lengths
Window Value: 20 characters (including decimal place if needed)

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

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 ISO 11783-6:2014(E)

B.19.2.16 2x1 String Input Value Window

Window Type 15

Description This window displays a single string input in two horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to String Value

be Displayed

Window
Value Type
Input String object

Number of 1
Object
References

Object #1 –
Reference
Input String object (for the string value)

VT Field Window Title: 20 characters

Lengths
Window Value: 20 characters

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3.
and Scaling

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.19.2.17 2x1 Horizontal Linear Bargraph Window

Window Type 16

Description This window displays a single horizontal linear bargraph in two horizontal
window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Bar Value

be Displayed

Number of 1
Object
References

Object #1 – Linear Bar Graph

Reference

VT Field Window Title: 20 characters

Lengths

VT The VT may format the window as desired, and may ignore colour and Font
Formatting Attributes in the referenced objects. Field length shall conform to the above
and Scaling requirements. The VT may scale objects, excluding the Window Icon, if required
or desired.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall supply a linear bargraph object in the horizontal position. Bargraph may
grow in either direction but left to right is recommended.

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.19.2.18 2x1 Single Button Window

Window Type 17

Description This window displays a single Button object in two horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to One Button

be Displayed

Number of 1
Object
References

Object #1 – Button
Reference

VT Field Window Title: 20 characters

Lengths

VT The VT design is free to format the window as desired, and may ignore colour
Formatting and Font Attributes in the referenced Button object. Field length requirements
and Scaling above shall be met. The VT is free to scale objects, excluding the Window Icon,
if needed or desired but in the case of the Button object shall only maintain or
increase its size to avoid clipping child objects.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall also scale the Button object and its children according to these equations:

Button Width = Window Cell Width * 80% (rounded down)

Button Height = Window Cell Height * 57% (rounded down)

Child objects shall also be scaled accordingly. Due to these rules, it is likely not
possible to use the same Button object in a Data Mask and a Window Mask
since the scale factors are different.

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

180 © ISO 2014 – All rights reserved

--```,`,`,,``,,````,,,

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 ISO 11783-6:2014(E)

B.19.2.19 2x1 Double Button Window

Window Type 18

Description This window displays two Button objects in two horizontal window cells.

Window Window Icon, Window Title. While both together are optional, at least one of
Designator these items shall be displayed by the VT.

Required to Two Buttons

be Displayed

Number of 2
Object
References

Object #1 – Button (for the left side button)

References
#2 – Button (for the right side button)
(in order)

VT Field Window Title: 20 characters

Lengths

VT The VT design is free to format the window as desired, and may ignore colour
Formatting and Font Attributes in the referenced Button objects. Field length requirements
and Scaling above shall be met. The VT is free to scale objects, excluding the Window Icon,
if needed or desired but in the case of the Button objects shall only maintain or
increase their size to avoid clipping child objects.

Working Set The Working Set has no control over formatting or layout. The Working Set shall
Formatting scale the Window Icon object according to Clause 4.7.15.3. The Working Set
and Scaling shall also scale the Button objects and their children according to these
equations:

Button Width = Window Cell Width x 40% (rounded down)

Button Height = Window Cell Height x 57% (rounded down)

Child objects shall also be scaled accordingly. Due to these rules, it is likely not
possible to use the same Button object in a Data Mask and a Window Mask
since the scale factors are different.

Example
Layout

This figure is provided for example only and shows all components of the
window. VT designs control the formatting and layout of this window.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

B.20 Key Group object

The Key Group object, available in VT version 4 and later, is a parent object that is used by the VT only in its
User-Layout Soft Key Mask. For details, refer to Clause 4.7.8. The Key Group object contains Key objects and
Object Pointer objects. An Object Pointer object shall point only to a Key object, another Object Pointer object,
or the NULL object.

The Key objects contained in this object shall be a grouping of Key objects, or Object Pointers to Key objects.
The VT shall not allow the operator to break up, even across visible Soft Key page boundaries, this grouping
when mapping the Key layouts and shall require the operator to map the entire group together. This also
means that several Key Cells can be required to represent this object.

Working Sets can participate in the VT’s User-Layout Soft Key Mask, if supported, by placing Key Group
objects in the object pool.

Working Set designers should make the Key Group object transparent. This allows the VT to set the
background colour of each child Key object so that all Keys have the same background colour. If required, the
Working Set can determine the VT’s background colour using the Get Window Mask Data message.

Object Pointer objects pointing to the NULL Object ID reserve a Key object position (the remaining Key
objects do not move up and the trailing Key object can be navigated to.

Allowed Commands:

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Table B.62 — Key Group events

Event Caused by VT behaviour Message

On Change Change Attribute Modify attributes of this object. Change Attribute response
Attribute command

Table B.63 — Key Group attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =35 3 Object type = Key Group
Options 1 Integer 1 0-3 4 Option bits:
Bit 0 = Available. If 0 (FALSE) this object is not
available for use at the present time, even
though defined. The VT shall not allow the
operator to map it and if already mapped, shall
blank out the key cell(s) that it occupies.
Bit 1 = Transparent. If this bit is 1, the VT shall
ignore the background colour attribute in all
child Key objects and shall set the background
colour as desired.
Bits 2-7 = Reserved, set to 0.
Name 2 Integer 2 0-65534 5-6 Object ID of an Output String object or an

182 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object Pointer object that points to an Output
String object that contains the string that gives a
proper name to this object. The VT may choose
to ignore colour and font information and do its
own formatting of the text. The VT shall use this
name in its proprietary mapping screen. The VT
shall be capable of displaying at least 20
characters.
Key Group Icon Integer 2 0-65534, 7-8 Object ID of an output object (as specified in
65535 Table A.2 — Allowed hierarchical relationships
of objects, "Object Label Graphic
Representation" column) that contains an
optional icon for the key group. The VT may use
this in the proprietary mapping screen to
represent the key group.
NOTE: It is recommended not to use a
transparent background for objects as these
objects may appear on a proprietary mapping
screen where the background colour is
unknown by the designer.
Number of Integer 1 1-4 9 Number of Key or Object Pointer objects to
objects to follow follow. After dereferencing pointers, there shall
be a maximum of 4 Key objects per Key Group
object.
Number of Integer 1 0-255 10 Number of Macro references included even if
macros to follow zero. Each Macro reference consists of 2 bytes:
one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
VT version 5 and later: A reference to a Macro
with 16-bit Object ID shall count as 2 macro
references within the context of this attribute.
Repeat: Integer 2 0-65534 11+ Object ID of an object contained in this Key
{Object ID} object*2 Group. (See Clause A.1.3 Object relationships).
List all objects before listing macros.
Repeat: Integer 1 0-255 11+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*2)… event type that causes this Macro to execute.
16-bit Macro Object ID reference (only for VT
version 5 and later): Event ID of event type that
causes this Macro to execute or 0xFF (see
Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 12+ (No. 8-bit Macro Object ID reference: Macro ID of the
objects Macro to execute.
*2)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)

B.21 Object Label Reference List object

The Object Label Reference List object, available in VT version 4 and later, provides a mechanism to assign a
String Variable and / or a graphical designator as a label to other objects. An Object Pool shall not contain
more than one Object Label Reference List object.

An object label is only intended for use by the VT in various proprietary screens and popup messages or
editors, and recommended for use in new Working Set designs. Object Labels are useful in two specific
cases, though not limited to these two:

⎯ It is recommended that Working Set designs provide an object label with a text name for the Working Set
object. This text may be used by the VT to identify the Working Set in proprietary screens and alarms
(e.g. “Planter” could be used to differentiate one Working Set from others).

⎯ It is recommended that Working Set designs provide an Object Label for all input objects. Since popup
editor windows in the VT may cover the focused input object, it is also recommended that VT designs
display the Object Label in the popup editor window so that the operator can recall what is being edited.
An example of such a label could be “Section 1 Width (meters)” and/or an appropriate designator graphic.

Strings in excess of 32 characters may be clipped to 32 characters by the VT. Referenced designator graphics

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
shall fit within a Soft Key designator area (See Clause 4.5.3 Soft Key Mask area and Soft Key designators).
The referenced designator object may contain objects as listed in Object Label graphic representation (See
Table A.2 — Allowed hierarchical relationships of objects). It is not possible to assign more than one label to
an object. When an Object ID, of an object to label, appears more than one time in the Object Label
Reference List, the Object Pool shall be rejected. When an object is used as a label, and this object also has a
label, this latter label shall not be displayed.

To permit disabling an Object Label, both the String Variable reference and the Graphical Reference could be
set to NULL and the VT should be designed to not show an Object Label.

Allowed Commands:

⎯ Change Object Label command;

⎯ Get Attribute Value message.

Table B.64 — Object Label Reference List attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =40 3 Object Type = Object Label Reference List
Number of [1] Integer 2 0-65535 4-5 Number of labeled objects to follow. One
Labeled objects labeled object consumes 7 bytes.
Repeat: Integer 2 0-65534 6-7.. Object ID of object to label.
{Object ID}
{String Variable Integer 2 0-65535 8-9.. Object ID of a String Variable object that
reference} contains the label string or FFFF16 if no text is
supplied
{Font type} Integer 1 0-255 10.. Font type (See Annex L) (ignored if String
Variable object reference is NULL or the string
contains a WideString (See Clause 4.6.19.7
String encoding).

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
{Object Label Integer 2 0-65535 11-12.. Object ID of an object to be used as a graphic
graphic representation of the object label or FFFF16 if no
representation} designator supplied. When the VT draws this
object it shall be clipped to the size of a Soft
Key designator. See Table A.2 — Allowed
hierarchical relationships of objects
for allowed objects.

B.22 External Object Definition object

The External Object Definition object, available in VT version 5 and later, lists the objects which another WS is
allowed to reference through the External Object Pointer.

When an object pool is loaded from non-volatile memory the VT shall clear the Enable bit in the Options
attribute of all External Object Definition objects. See Clause 4.6.11.6. Table B.65 — External Object
Definition events and Table B.66 — External Object Definition attributes and record format.

Allowed Commands:

⎯ Change Attribute command;

⎯ Change List Item command;

⎯ Get Attribute Value message.

Table B.65 — External Object Definition events

Event Caused by VT behaviour Message

On Change Change Attribute Reevaluate all currently displayed External Change Attribute response
Attribute command Object Pointer objects which reference objects in
the WS which owns this object.

Table B.66 — External Object Definition attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =41 3 Object Type = External Object Definition
Options 1 Integer 1 0-1 4 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Enabled. If TRUE the object is enabled
and the WS identified by the NAME attributes is
allowed to reference objects via the External
Object Pointer object. If FALSE this object is
disabled and shall be ignored.
a
NAME 0 2 Integer 4 0 5–8 Byte 1-4 of the NAME of the WS Master of the
to WS which shall be allowed to reference the
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2^32-1 objects in the object list.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
a
NAME 1 3 Integer 4 0 9- 12 Byte 5-8 of the NAME of the WS Master of the
to WS which shall be allowed to reference the
2^32-1 objects in the object list.

Number of Integer 1 0-255 13 Number of objects to follow even if zero. Each

object to follow object consists of 2 bytes.
Repeat: Integer 2 0-65534, 14+ These objects make up the list of objects which
{Object ID} 65535 object*2 can be externally referenced. NULL is a
"no item" placeholder. The Change List Item
command allows objects to be replaced.
a
It is recommended that the WS clears the Enabled bit in the Options attribute before updating the NAME attributes.

B.23 External Reference NAME object

The External Reference NAME object, available in VT version 5 and later, identifies the WS master of a WS
which can be referenced through the External Object Pointer.

When an object pool is loaded from non-volatile memory the VT shall clear the Enable bit in the Options
attribute of all External Reference NAME objects.

See Table B.67 — External Reference NAME events and Table B.68 — External Reference NAME attributes
and record format.

Allowed Commands:

⎯ Change Attribute command;

⎯ Get Attribute Value message.

Table B.67 — External Reference NAME events

Event Caused by VT behaviour Message

On Change Change Attribute Reevaluate all currently displayed External Change Attribute response
Attribute command Object Pointer objects which reference this
object.

Table B.68 — External Reference NAME attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =42 3 Object Type = External Reference NAME
Options 1 Integer 1 0-1 4 Logical bits to indicate options. 1 = TRUE.
Bit 0 = Enabled. If TRUE the object is enabled
and the WS identified by the NAME attributes
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

can be referenced by an External Object Pointer

object. If FALSE the object is disabled and any
External Object Pointer object referencing this
object shall be considered invalid.

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
a
NAME 0 2 Integer 4 0 5-8 Byte 1-4 of the NAME of the referenced WS
to Master.
2^32-1
a
NAME 1 3 Integer 4 0 9 - 12 Byte 5-8 of the NAME of the referenced WS
to Master.
2^32-1
a
It is recommended that the WS clears the Enabled bit in the Options attribute before updating the NAME attributes.

B.24 External Object Pointer object

The External Object Pointer object, available in VT version 5 and later, allows a Working Set to display objects
that exist in another Working Set’s object pool. By changing the value of the pointer object, a different object
can be referenced to the same location. An External Object Pointer can point to the NULL Object ID and in
this case the Default Object shall be drawn.

The Default Object is drawn under the following conditions:

⎯ The External Object Pointer, or any directly followed Object Pointer, points to the NULL Object ID,

⎯ If any child object of the External Object Pointer is invalid based on the object hierarchy (See Table A.2 —
Allowed hierarchical relationships of objects).

When an object pool is loaded from non-volatile memory the VT shall set the External Object Id attribute of all
External Object Pointer objects to the NULL object id. This forces the WS to renew the External Object ID.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

See Table B.69 — External Object Pointer events and Table B.70 — External Object Pointer attributes and
record format.

Allowed Commands:

⎯ Change Numeric Value command;

⎯ Change Attribute command;

⎯ Get Attribute Value message.

Table B.69 — External Object Pointer events

Event Caused by VT behaviour Message

On Change Change Attribute Reevaluate the External Object Pointer object Change Attribute response
Attribute command and redraw if required.

Table B.70 — External Object Pointer attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =43 3 Object Type = External Object Pointer

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Default Object 1 Integer 2 0-65534, 4-5 Object ID of an object which shall be displayed
ID 65535 if the External Object ID is not valid.
NOTE: The default object is always from the
same object pool as this object.
External 2 Integer 2 0-65534, 6-7 Object id of an External Reference NAME
Reference 65535 object or the NULL Object Id.
NAME ID
External Object 3 Integer 2 0-65534, 8-9 Object ID of a referenced object or the NULL
ID 65535 Object ID. The referenced object is found in the
object pool of the Working Set Master identified
by the External Reference NAME ID attribute
and listed in the corresponding External Object
Definition object.

B.25 Animation object

The Animation object, available in VT version 5 and later, is used to display animations. This object consists of
a list of object ids, one of which is drawn determined by the Value attribute.

Working Set designers should be aware that the performance of the VT cannot be predicted, so the size of the
individual objects should be small and the refresh rate kept reasonable (200 ms or slower is recommended).
The refresh rate attribute is a suggestion only and cannot be guaranteed by the VT design. The VT may limit
or modify the refresh interval.

The VT shall increment the index Value when this object is enabled and the refresh interval is non-zero and is
a visible member of an active mask and the specified Refresh Interval has expired. When not visible, the
animation timer is suspended, so the index Value shall not be incremented. If multiple instances of this object
are visible, the same referenced object shall be visible in each instance. Further, the Refresh Interval is based
on the object, and shall not be affected by the number of visible instances.
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When the VT prepares to increment the index Value, it shall be range checked against the ‘First Child Index’
and the ‘Last Child Index’. If the index Value < First Child index, it shall be set to the value of the First Child
Index and then incremented (in this case, the object referenced by the First Child Index is not shown). If the
index Value > Last Child Index, it shall be set to Last Child Index and then the behavior is controlled by the
Animation Sequence value in the Options attribute.

The VT shall not display anything for the selected item in the following cases:

⎯ index value is 255 which means “no item is chosen”

⎯ index value is invalid (greater than the number of items in the list minus 1)

⎯ selected list item is a no-item placeholder (NULL)

⎯ selected list item is an Object Pointer with a value of NULL

⎯ selected list item is a Container, and the Container is in the hidden state

⎯ the object is enabled and any of the following numeric relationships are not true:

o 0 <= First Child Index <= Last Child Index

o 0 <= Last Child Index < number of items in the list

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 ISO 11783-6:2014(E)

o 0 <= Default Child Index < number of items in the list

Note that this object can contain more child objects than are defined by the range 'First Child Index' to 'Last
Child Index'. This allows the working set to change the animation by changing the values of the 'First Child
Index' and 'Last Child Index' attributes without the need to upload a new child object list.

The Animation object animation sequence may be configured in either Single Shot or Loop modes.

⎯ Single Shot mode: In Single Shot mode, the animation sequence is played only once starting with the List
Index being initialized to the 'First Child Index' value, and ending with the List Index being equal to the
'Last Child Index' value. Once complete, the animation stops and the last child object remains displayed
as long as the object is enabled. The single-shot animation sequence can be altered or replayed by
changing the index Value or by disabling and then re-enabling the object which resets the index Value to
the 'First Child Index'. If this object is initially enabled in the object pool, then the animation is played
starting with the child referenced by the Index value the first time this object is displayed.

⎯ Loop mode: In Loop mode, the animation is repeated as long as the object is enabled. After the child
object at the 'Last Child Index' is displayed, the index Value is reset to the 'First Child Index' attribute
value and the child object at that index is displayed. This cycle repeats until the object is disabled.

If the Working Set changes the index Value at runtime, the current refresh interval is restarted and the
selected object is drawn.

When the Animation object is disabled, the presentation is defined by one of four modes.

⎯ Pause mode: The index Value is unchanged and the child at this index is shown. This mode allows
animations to be enabled and disabled without skipping child objects in the animation.

⎯ Reset to First mode: The index Value is reset to the ‘First Child Index’ when disabled, and the child at this
index is drawn.

⎯ Default Object mode: The index Value is unchanged, however the child at the ‘Default Child Index’ is
drawn.

⎯ Blank mode: The index Value is unchanged, and no object is drawn.

Allowed Commands:

⎯ Enable/Disable Object command;

⎯ Change Numeric Value command;

⎯ Change Attribute command;

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⎯ Change List Item command;

⎯ Change Size command;

⎯ Get Attribute Value message.

Table B.71 — Animation events

Event Caused by VT behaviour Message

On Refresh See Data Mask Redraw this object.
—
Refresh for caused

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 ISO 11783-6:2014(E)

Event Caused by VT behaviour Message

by conditions
On Enable Enable/Disable Mark the object enabled. Set Enabled attribute to Enable/Disable Object Response
Object command 1 (animating)
On Disable Enable/Disable Mark the object disabled. Set Enabled attribute to Enable/Disable Object Response
Object command 0 (stopped, behaviour according to the Disabled
Behavior option)
On Change Change Numeric If object is displayed, redraw object with new Change Numeric Value response
Value Value command (to value. Refresh parent object.
change the list
index)
On Change Change Attribute For behaviour, see Change Background Colour Change Attribute response
Attribute command command.
On Change Size Change Size Draw object at current location in background Change Size response
command colour to erase it. Refresh parent mask.

Table B.72 — Animation attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =44 3 Object Type = Animation object
Width 1 Integer 2 0-65535 4-5 Maximum width of the Animation object's area
in pixels. Objects or portions of objects outside
the defined area are clipped.
Height 2 Integer 2 0-65535 6-7 Maximum height of the Animation object's area
in pixels. Objects or portions of objects outside
the defined area are clipped.
Refresh 3 Integer 2 0-65535 8-9 Desired time in ms between refreshes of this
Interval object. The value zero stops the timer but is not
equivalent to enabled = 0.
Value 4 Integer 1 0-254, 10 List Index of the object to be shown. The first
255 item is at index zero (0).
Enabled 5 Integer 1 0 or 1 11 When set to 1, this object is enabled
(animating). When set to 0, this object is
disabled (stopped).
First Child 6 Integer 1 0-254 12 This attribute represents the index of the first
Index child object in the animation sequence.
Last Child 7 Integer 1 0-254 13 This attribute represents the index of the last
Index child object in the animation sequence.
Default Child 8 Integer 1 0-254 14 This attribute represents the index of the
Index default child object in the animation sequence.
See Options attribute, Disabled Behavior.
Options 9 Integer 1 0-7 15 Options:
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Bit 0 = Animation Sequence

0 = Single Shot mode
1 = Loop mode
Bits 1-2 = Disabled Behavior
0 = Pause mode

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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
1 = Reset to First mode
2 = Default Object mode
3 = Blank mode
Bits 3-7 = 0
reserved
Number of Integer 1 0-255 16 Number of object references to follow even if
objects to zero. Each object consists of 6 bytes: two (2)
follow for object ID and four (4) for location.
Number of Integer 1 0-255 17 Number of Macro references included even if
macros to zero. Each Macro reference consists of
follow 2 bytes: one for event ID and one for Macro ID.
Whenever the indicated event occurs, the
associated Macro is executed.
A reference to a Macro with 16-bit Object ID
shall count as 2 macro references within the
context of this attribute.
Repeat: Integer 2 0-65534 18+ Object ID of an object in this animation object
{Object ID} object*6 (See Clause A.1.3 Object relationships). List all
objects before listing macros.
{X Location} Signed 2 -32768 20+ Relative X location of the top left corner of the
integer to object*6 object (relative to the top left corner the
+32767 Container object).
{Y Location} Signed 2 -32768 22+ Relative Y location of the top left corner of the
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integer to object*6 object (relative to the top left corner of the

+32767 Container object).
Repeat: Integer 1 0-255 18+ (No. (List these after all objects have been listed.)
{Event ID} objects 8-bit Macro Object ID reference: Event ID of
*6)… event type that causes this Macro to execute.
16-bit Macro Object ID reference: Event ID of
event type that causes this Macro to execute or
0xFF (see Clause 4.6.22.3)
{Macro ID} Integer 1 0-255 19+ (No. 8-bit Macro Object ID reference: Macro ID of
objects the Macro to execute.
*6)… 16-bit Macro Object ID reference (only for VT
version 5 and later): Low byte or high byte of
Macro ID of the Macro to execute (see Clause
4.6.22.3)

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 ISO 11783-6:2014(E)

Annex C
(normative)

Object transport protocol

C.1 Virtual terminal messages and object transfer

Two PGNs are reserved for the VT message protocol, as follows.

⎯ VT to ECU

Transmission repetition rate: As required

Data length: variable
Data page field: 0
PDU format field: 230
PDU specific field: Destination address
Default priority: 7
Parameter group number: 58880 (00E60016)

⎯ ECU to VT

Transmission repetition rate: As required

Data length: variable
Data page field: 0
PDU format field: 231
PDU specific field: Destination address
Default priority: 7
Parameter group number: 59136 (00E70016)

Before a Working Set Master builds an object pool in a VT, it may obtain information about the VT’s
capabilities by using the Get Technical Data messages. Annex D defines messages using the above PGNs to
obtain information about the VT’s characteristics and thus allow each Working Set Master to configure its
object pool to meet the VT’s capabilities.

All VT to ECU and ECU to VT messages where the computed data length is less than 8 bytes shall be padded
to 8 bytes with FF16.

The VT to ECU and the ECU to VT PGN’s are Group Function messages. If a CF receives one of those
PGN’s but with an unknown or reserved command / parameter defined in the first byte it shall respond with a
NACK by using the message Unsupported VT Function message (see Clause F.66) or VT Unsupported VT
Function message (see Clause F.67).

C.2 Building object pools

C.2.1 General

This clause specifies the transfer of the object pool via an ISO 11783 network. The PGNs listed above are
used to transfer the object pool to the VT utilizing single packets (not recommended), the transport and
extended transport protocol specified in ISO 11783-3. Destination specific messages shall be used and
Connection Management shall be implemented.

The object pool is considered as one large block of data with each object and its attributes making up a single

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 ISO 11783-6:2014(E)

variable length record, as shown in Figure C.1 — Object pool variable length record format. If the total size of
this transfer exceeds the 1 785 byte limit of normal transport protocol, the extended transport protocol
specified in ISO 11783-3 shall be used. The VT design shall be able to support all the transport protocol
functions.

The VT shall receive, parse and store the received objects. If, during parsing, the VT encounters a new object
with an ID matching a previously parsed object (regardless of the object’s type), the new object will be
considered a replacement for the old object. The VT designer determines the method of storage. The format
of the object records was detailed earlier.

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Data items and attributes of size greater than 1 byte shall always be transmitted in little endian order (least
significant byte first).

Object No. 1 Object ID Type Attributes and data

Object No. 2 Object ID Type Attributes and data
Object No. 3 Object ID Type Attributes and data

Figure C.1 — Object pool variable length record format

The Working Set Master shall transfer a “clean” object pool, adjusted accordingly for the VT hardware
connected and also adapted to the VT version being reported. Sending an invalid pool with objects or macros
that do not parse properly (e.g. invalid colours) and then altering those objects later with change commands is
not permitted, since this can cause parsing errors and error displays at the VT and could cause the VT to
ignore those objects or macros with errors or to delete the object pool from volatile storage and suspend the
Working Set.

The VT shall identify invalid pools and shall notify the operator about the issue within the object pool.

Error Codes in the End of Object Pool response or errors in the VT Change Active Mask message indicate
that the VT has identified an invalid object pool.

Even if the VT decides to continue with an invalid object pool, the Working Set Master may decide to go to a
safe state when it receives the error indication from the VT.

C.2.2 Object pool transfer procedure

The following procedure is used to transfer an object pool.

a) The Working Set Master shall determine if the VT has available memory by transmitting a Get Memory
message (See Clause D.2). The VT shall acknowledge this message with a Get Memory response (See
Clause D.3). VTs which are designed to do so may use this request to allocate memory for the pool. The
Working Set Master shall check the error codes returned. If no error is reported, the Working Set Master
may proceed.

b) The Working Set Master uses single packet (not recommended), transport protocol, or extended
transport protocol (specified in ISO 11783-3), or combinations of these, to move the object pool to the VT
using the object pool transfer message. (See Clause C.2.3 Object pool transfer message). Normal
handshaking, error checking and re-transmission, in accordance with ISO 11783-3, shall be implemented.
Working Set designers should recognize that the VT can send CTS with number of packets set to zero (0)
while other object pools are being loaded and that this could continue for a significant amount of time.

c) The following rules govern the transfer of the object pool:

1) The Working Set Master may send several single packet, TP or ETP sessions or a combination of
any of these to transfer the entire pool. This can be required depending on the size of buffers

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 ISO 11783-6:2014(E)

designed into the Working Set Master. Any number of sessions may be sent before the End of Object
Pool message is sent. Multiple TP and/or ETP sessions can also be required if scaling or pool
adjustments or both have to be made before sending the object pool to the VT.

2) Object records in each session shall be complete and shall not be “split” between sessions of TP or
ETP. Single packet transfers shall contain a complete object.

3) Transfer sessions containing no object records are not permitted.

d) Upon completion, the Working Set Master shall transmit an End of Object Pool message (See Clause
C.2.4) to the VT to indicate that the object pool is now complete and ready for use.

e) When the VT receives the End of Object Pool message, it shall set the "parsing" bit in the VT Status
message to 1 until it has finished parsing the object pool and sends the End of Object Pool response.

f) After sending the End of Object Pool message, the Working Set Master shall wait for an End of Object
Pool response. The Working Set Master shall wait for the End of Object Pool response message until
three consecutive VT Status messages have been received where the "parsing" bit is set to 0. Three
messages are waited for to avoid race conditions created by a VT Status message that may already be in
a transmit queue, which does not correctly identify the parsing state. If the End of Object Pool response is
not received by the Working Set Master, then it shall assume that the End of Object Pool message was
not received by the VT. Under these conditions the Working Set Master may retry the End of Object Pool
message up to three times before it assumes an unexpected shutdown of the VT after which the Working
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Set Master shall obey the requirements of Clause 4.6.9 (Connection management) (Updating pools at
runtime).

g) Commands are sent from a Working Set to the VT using the PGNs given in Annex C. Only Working Set
Masters (not Members) are allowed to send any of the commands in this annex. The originating master
shall wait for a response before sending another command from this Annex.

C.2.3 Object pool transfer message

The following message is sent by a Working Set Master to transfer part of an object pool to the VT.

Transmission repetition rate: As required

Data length: Variable
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 1710

Bits 7 - 4 0001 Command Object Pool Transfer
Bits 3 - 0 0001 Parameter Object Pool Transfer
Bytes 2-n Object pool records (See Figure C.1 — Object pool variable
length record format)

NOTE Since there is no response to this message, it is recommended to not send single objects that fit within a
single packet.

C.2.4 End of Object Pool message

The following message is sent by a Working Set Master to indicate that the object pool is complete and ready
for use. It is sent after the initial object pool definition and also after any object is redefined or added to the
pool during operation.

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Transmission repetition rate: Upon completion of object pool transfer

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 1810

Bits 7 - 4 0001 Command Object Pool Transfer
Bits 3 - 0 0010 Parameter Object Pool Ready
Bytes 2–8 Reserved, set to FF16
C.2.5 End of Object Pool response

This message is sent by the VT to a Working Set Master to acknowledge the End of Object Pool message.
When the VT replies with an error of any type, the VT should delete the object pool from volatile memory
storage and inform the operator by an alarm type method of the suspension of the Working Set and indicate
the reason for the deletion. On reception of this message, the responsible ECU(s) should enter a fail-safe
operation mode providing a safe shutdown procedure of the whole device.

NOTE A VT can take a long time to parse a pool. The End of Object Pool response shall be delayed until this activity
completes. The VT Status message shall reflect the current state of the VT (is busy parsing a pool).

Transmission repetition rate: In response to End of Object Pool message

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific

Byte 1 VT function = 1810

Bits 7 - 4 0001 Command Object Pool Transfer
Bits 3 - 0 0010 Parameter Object Pool Ready
Byte 2 Error Codes (0 = no errors)
Bit 0 = 1 = There are errors in the Object Pool, refer to Bytes
3 to 8 for additional error information
Bit 1 = 1 = VT ran out of memory during transfer
Bit 2, 3 = Reserved, set to 0
Bit 4 = 1 = any other error
Bit 5-7 = Reserved, set to 0
Bytes 3, 4 Parent Object ID of faulty object, set to NULL Object ID if there
are no object pool errors
Bytes 5, 6 Object ID of faulty object, set to NULL Object ID if there are no
object pool errors
Byte 7 Object Pool Error Codes (0 = no errors)
Bit 0 = 1 = method or attribute not supported by the VT
Bit 1 = 1 = unknown object reference (missing object)
Bit 2 = 1 = any other error
Bit 3 = 1 = object pool was deleted from volatile memory
Bit 4-7 = Reserved, set to 0
Byte 8 Reserved, set to FF16
C.2.6 Updating pools at runtime

If the Working Set needs to modify or add one or more objects, then the Working Set may update its pool at
runtime. For example, if the Working Set needs to change the size of an object (e.g. increase the length of a
string object) it may send the replacement object with the revised record format. (See Clause 4.6.10.3) This is
accomplished by using the same messages and procedures used to upload the pool at initialization as follows.

a) The Working Set Master shall determine if the VT has available memory by transmitting a Get Memory
message (See Clause D.2 Get Memory message). The Memory Required parameter shall be based on
the size of this update to the pool, and not based on the size of the original pool plus the update. The VT
acknowledges this message with a Get Memory response (See Clause D.3). The Working Set Master
shall check the error codes returned. If no error is reported, the Working Set Master may proceed.

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 ISO 11783-6:2014(E)

b) The Working Set Master uses single packet transfer (not recommended), extended transport protocol, or
transport protocol, to move the object or objects to the VT. Normal handshaking, error checking and
retransmission, in accordance with ISO 11783-3, shall be implemented. (See Clause C.2.2.b Object pool
transfer procedure)

c) Upon completion, the Working Set Master shall transmit an End of Object Pool message (See Clause
C.2.4) to the VT to indicate that the update is now complete and ready for use.

d) The VT responds with the End of Object Pool response (See Clause C.2.5)

Only those objects that need to be changed should be transmitted during the update; all other objects will
remain in VT memory following the update.

In the case of errors in the update to the object pool, the VT indicates the errors with the End of Object Pool
response. The VT deletes the entire object pool from volatile memory, (including the object pool as it existed
prior to the object pool update) and informs the operator by an alarm type method of the suspension of the
Working Set and indicates the reason for the deletion. On reception of this message, the responsible ECU(s)
shall behave as described (See Clause C.2.5 End of Object Pool response) when an End of Object Pool
response is received indicating errors in the object pool.

The VT shall handle commands and macros from a Working Set even while that Working Set is updating its
object pool.

Example: The operator presses a Soft Key while the pool is being updated by the Working Set. The VT
shall immediately execute the macros triggered and commands sent from that Working Set without waiting for
the completion of the pool update.

The VT shall keep the new/updated objects separate from the original pool, until reception of the End of
Object Pool message. The objects shall be merged into the original pool before the VT sends the End of
Object Pool response. Working Set designers shall be aware that behavior is unpredictable for commands
acting on the new/updated objects if these commands are sent after the End of Object Pool message and
before reception of End of Object Pool response. Such commands will be applied to either the original pool or
the updated pool. Changes to objects shall take effect immediately.

It is recommended that Working Sets do not transmit commands which act upon these new objects until the
End of Object Pool response is received from the VT.

NOTE Changes to objects should utilise Annex F commands when possible rather than performing a pool update
due to the processing time of the pool update process (e.g. Change Size command performs faster than reloading an
object with a new size).
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 ISO 11783-6:2014(E)

Annex D
(normative)

Technical data messages

D.1 General
The technical data messages are used to request the characteristics of the VT. They consist of the request for
data by the Working Set and the response by the VT. The following messages are not allowed in macros.
Working Set masters or members may send any command in this Annex.

The VT shall respond to these commands even if the requesting ECU is not part of a Working Set, thus
permitting ECUs to acquire the VT metrics before connecting.

D.2 Get Memory message

The Get Memory message allows the Working Set to determine if the VT is out of memory and/or to determine
the VT version.

In version 3 and prior VTs, the “Memory Required” parameter represents the number of bytes in the object
pool (see Clause C.2.1) to be transferred. In version 4 and later VTs, the “memory required” parameter is the
sum of the number of bytes in the object pool to be transferred and the estimated storage of all Graphics
Context objects that are defined in the object pool to be transferred. The Working Set may send less than the
amount communicated in the Memory Required parameter.

The storage space required for a single Object Pool object (OPO) can be determined from the definition of the
specific object.

The storage space required for a single Graphics Context object (GCO) shall be estimated as follows:

Size of a GCO =

where RoundUp is a function that will round the value up to the nearest integer, width and height are
measured in pixels, and the VT.PixelsPerByte is based on the VT capabilities and is defined as
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follows:

VT Capability Graphic Type VT.PixelsPerByte

Monochrome 0 8
16 colour 1 2
256 colour 2 1

The Memory Required parameter can then be estimated as follows:

Memory Required =
⎛ size of ( OPO[i ]) ⎟⎞ + ⎜⎛ size of ( GCO[ j]) ⎟⎞
∑ i=1 ∑ j=1
Number of OPO Number of GCO
⎜
⎝ ⎠ ⎝ ⎠

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 ISO 11783-6:2014(E)

where the second parenthesized term is only used for VT version 4 and later.

For more details on the use of the Memory Required parameter, see Clause C.2.2 for Object pool transfer
procedure and Clause C.2.6 for Updating pools at runtime.

The Working Set should send the Get Memory message with the Memory Required set to zero in order to
receive the response indicating the VT version number. This information may be used to calculate the actual
Memory Required parameter. If the VT design allocates memory based on this message, it should not allocate
any storage for this special case request.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19210

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0000 Parameter Get Memory
Byte 2 Reserved, set to FF16
Bytes 3-6 Memory Required
Bytes 7, 8 Reserved, set to FF16

D.3 Get Memory response

If the VT responds with status code one (1), the Working Set Master shall not transmit its object pool.

Transmission repetition rate: In Response to Get Memory message

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 19210

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0000 Parameter Get Memory
Byte 2 Version Number The version of ISO 11783 Part 6 that this VT meets
0 = Hannover Agritechnica 2001 limited feature set
1 = FDIS Version ISO11783-6:2002(E), (Final Draft
International Standard)
2 = IS Version ISO11783-6:2004(E), First Edition, 2004-06-
15
3 = IS Version ISO11783-6:2010(E), Second Edition,
(ISO11783-6:2004(E) and features specifically noted with
version 3 reference)
4 = IS Version ISO11783-6:2010(E), Second Edition,
(ISO11783-6:2004(E) and features specifically noted with
version 4 reference)
5 = IS Version ISO11783-6:2014(E), Third Edition
(this document in its entirety)
Byte 3 Status
1
0 = There can be enough memory.
1 = There is not enough memory available. Do not transmit
Object Pool.
Byte 4-8 Reserved, set to FF16
1
Because there is overhead associated with object storage it is impossible to predict whether there is
enough memory available without having prior knowledge of the exact content of the object pool.

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 ISO 11783-6:2014(E)

D.4 Get Number of Soft Keys message

The Get Number of Soft Keys message is used by the Working Set to request the available divisions of the X
and Y axes for Soft Key descriptors, the available virtual Soft Keys and the number of physical Soft Keys. VT
Version 4 and later provides the number of physical Soft Keys that are used by the VT for navigation among
the virtual Soft Keys.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19410

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0010 Parameter Get Number Of Soft Keys
Bytes 2-8 Reserved, set to FF16

D.5 Get Number of Soft Keys response

Transmission repetition rate: In response to Get Number of Soft Keys message
Data length: 8 bytes
Parameter group number: VT to ECU, destination specific

Byte 1 VT function = 19410

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0010 Parameter Get Number Of Soft Keys
Response
Byte 2 Navigation Soft Keys Version 3 and Prior: Reserved, set to FF16
Version 4 and Later: The number of Physical Soft Keys that
are used by the VT for navigation among the Virtual Soft
Keys.
Bytes 3-4 Reserved, set to FF16
Byte 5 X Dots Number of pixels on the X axis for a Soft Key descriptor
Byte 6 Y Dots Number of pixels on the Y axis for a Soft Key descriptor
Byte 7 Virtual Soft Keys Number of possible virtual Soft Keys in a Soft Key Mask
Version 3 and Prior: 6 to 64 (inclusive)
Version 4 and Later: 64
Byte 8 Physical Soft Keys Number of Physical Soft Keys

D.6 Get Text Font Data message

The Get Text Font Data message allows the Working Set to request the characteristics of fonts, type sizes,
type attributes and colour capabilities.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19510

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0011 Parameter Get Text Font Data
Bytes 2-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

D.7 Get Text Font Data response

Transmission repetition rate: In response to Get Text Font Data message
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 19510

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0011 Parameter GetText Font Data Response
Bytes 2-5 Reserved, set to FF16
Byte 6 Small font sizes (Values are width x height)
0000 0000 Font 6 × 8 (Default)
0000 0001 Font 8 × 8
0000 0010 Font 8 × 12
0000 0100 Font 12 × 16
0000 1000 Font 16 × 16
0001 0000 Font 16 × 24
0010 0000 Font 24 × 32
0100 0000 Font 32 × 32
1000 0000 Reserved
Byte 7 Large font sizes
0000 0001 Font 32 × 48
0000 0010 Font 48 × 64
0000 0100 Font 64 × 64
0000 1000 Font 64 × 96
0001 0000 Font 96 × 128
0010 0000 Font 128 × 128
0100 0000 Font 128 × 192
1000 0000 Reserved
Byte 8 Type attribute Supported font styles
0000 0000 Normal text (Default)
0000 0001 Bold text
0000 0010 Crossed out text
0000 0100 Underlined text
0000 1000 Italics text
0001 0000 Inverted text

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0010 0000 Flash between inverted and
styles set by bits 0-3
0100 0000 Flash both the background
and
the foreground between
Hidden and styles set by
bits 0-4
1
1000 0000 Proportional font rendering
1
VT version 4 and later

D.8 Get Hardware message

The Working Set sends the Get Hardware message to request the hardware design of the VT.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19910

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0111 Parameter Get Hardware

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 ISO 11783-6:2014(E)

Bytes 2-8 Reserved, set to FF16

D.9 Get Hardware response

Transmission repetition rate: In response to Get Hardware message
Data length: 8 bytes
Parameter group number: VT to ECU, destination specific

Byte 1 VT function = 19910

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0111 Parameter Get Hardware Response
Byte 2 Boot time Maximum number of seconds from a VT power startup or reset
cycle to the transmission of the first "VT Status message"
(See Clause 4.6.4 and G.2). Set to FF16 when this
1
information is not available.
Byte 3 Graphic Type Supported graphic modes
0 = Monochrome (VT supports colour codes 0 and 1 and
monochrome Picture Graphic objects only)
1 = 16 Colour (VT supports colour codes 0 through 15 and
monochrome and 16 colour Picture Graphic objects).
2 = 256 Colour (VT supports colour codes 0 through 255 and
all formats of Picture Graphic objects).
Byte 4 Hardware Supported hardware features
Bit 0 = 1 = VT has a touch screen and supports Pointing
Event message.
Bit 1 = 1 = VT has a pointing device and supports Pointing
Event message.
Bit 2 = 1 = VT has multiple frequency audio output
Bit 3 = 1 = VT has adjustable volume audio output
Bit 4 = 1 = VT supports simultaneous activations of all
combinations of Physical Soft Keys (See Clause 4.6.18 Soft
2
Key and Button activation)
Bit 5 = 1 = VT supports simultaneous activations of all
combinations of Buttons (See Clause 4.6.18 Soft Key and
2
Button activation)
Bit 6 = 1 = VT reports drag operation via Pointing Event
2
message (Bit 0 or Bit 1 shall be set to 1)
Bit 7 = 1 = VT supports intermediate coordinates during a
2
drag operation (Bit 6 shall be set to a 1)
Bytes 5,6 X - Pixels Number of divisions on the horizontal axis (X dots) (16 bit
unsigned integer) in the Data Mask Area
Bytes 7,8 Y - Pixels Number of divisions on the vertical axis (Y dots) (16 bit unsigned
integer) in the Data Mask Area. Since the Data Mask is
square, this value is always the same as the X Value.
1
VT version 4 and later.
2
These bits exist in VT version 4 and later.

D.10 Get Supported Widechars message

This message only applies to version 4 and later VTs.

The Get Supported Widechars message is used by the Working Set to determine the WideChars supported
by the VT.

The message only requests characters from a single code plane. If the ECU requires information about
multiple code planes multiple messages shall be sent.

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 ISO 11783-6:2014(E)

The request contains First WideChar and Last WideChar as a range, where First WideChar <= Last
WideChar.

The ECU can reduce the size of the response frame by sending multiple requests with small inquiry ranges
instead of one request with a large inquiry range.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19310

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0001 Parameter Get Supported WideChars
Byte 2 Code plane 0 => characters 0000016 – 0FFFF16
1 => characters 1000016 – 1FFFF16
…
16 => characters 10 000016 – 10 FFFF16
Bytes 3, 4 First WideChar in inquiry range
Bytes 5, 6 Last WideChar in inquiry range
Bytes 7, 8 Reserved, set to FF16

D.11 Get Supported WideChars response

This message only applies to version 4 and later.

Transmission repetition rate: In response to Get Supported Widechars message

Data length: Variable
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 19310

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0001 Parameter Get Supported WideChars response
Byte 2 Code plane 0 => characters 0000016 – 0FFFF16
1 => characters 1000016 – 1FFFF16
…
16 => characters 10 000016 – 10 FFFF16
Byte 3, 4 First WideChar in inquiry range
Byte 5, 6 Last WideChar in inquiry range
Byte 7 Error Codes (0 = no errors)
Bit 0 = 1 = Too many ranges (more than 255 sub-ranges in
the requested range)
Bit 1 = 1 = Error in Code plane
Bits 2-3 = Reserved, set to 0
Bit 4 = 1 = any other error
Bits 5-7 = Reserved, set to 0
Byte 8 Number of ranges Indicates the number of entries in the WideChar range array. Set
to 0 if Error codes is not equal to 0.
Bytes 9-n WideChar range array Each entry in the array consists of two WideChars:
first WideChar, last WideChar.

NOTE The ECU does not have to request this message because the VT shall display WideStrings even if they
contain unsupported characters (See Clause 4.6.19.7 String encoding). The VT shall include the characters from the
WideChar minimum character set when responding to a Code Plane 0 request (See Table L.7 — WideString minimum
character set).

Example Response from a VT supporting only the WideChar Minimum Character Set. The ECU has
requested information about characters 000016 to 3FFF16 in code plane 0.

C116, ; Command

202 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

0016, ; Code plane 0

0016, 0016, FF16, 3F16, ; Inquiry range (000016 - 03FFF16)
0016, ; Error Codes
0F16, ; 15 ranges
2016, 0016, 7E16, 0016, ; Range 1. Character 002016 - 007E16
A016, 0016, 7E16, 0116, ; Range 2. Character 00A016 - 017E16
C616, 0216, C716, 0216, ; Range 3. Character 02C616 - 02C716
C916, 0216, C916, 0216, ; Range 4. Character 02C916 - 02C916
D816, 0216, DD16, 0216, ; Range 5. Character 02D816 - 02DD16
7E16, 0316, 7E16, 0316, ; Range 6. Character 037E16 - 037E16
8416, 0316, 8A16, 0316, ; Range 7. Character 038416 - 038A16
8C16, 0316, 8C16, 0316, ; Range 8. Character 038C16 - 038C16
8E16, 0316, A116, 0316, ; Range 9. Character 038E16 - 03A116
A316, 0316, CE16, 0316, ; Range 10. Character 03A316 - 03CE16
0116, 0416, 0C16, 0416, ; Range 11. Character 040116 - 040C16
0E16, 0416, 4F16, 0416, ; Range 12. Character 040E16 - 044F16
5116, 0416, 5C16, 0416, ; Range 13. Character 045116 - 045C16
5E16, 0416, 5F16, 0416, ; Range 14. Character 045E16 - 045F16
AC16, 2016, AC16, 2016, ; Range 15. Character 20AC16 - 20AC16

D.12 Get Window Mask Data message

This message applies to version 4 and later VTs.

The Working Set sends the Get Window Mask Data message to request the background colour of User-
Layout Data Mask and the background colour of the Key Cells on a User-Layout Soft Key Mask.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19610

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0100 Parameter Get Window Mask Data
Bytes 2-8 Reserved, set to FF16

D.13 Get Window Mask Data response

This message only applies to version 4 and later VTs.

Transmission repetition rate: In response to Get Window Mask Data message

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific

Byte 1 VT function = 19610

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0100 Parameter Get Window Mask Data
Byte 2 Background colour of VT’s User-Layout Data Masks.
Byte 3 Background colour of VT’s Key Cells when on a User-Layout
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Soft Key Mask.

Bytes 4–8 Reserved, set to FF16

D.14 Get Supported Objects message

This command is used by the WS to get the list of all object types supported by the VT.

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 ISO 11783-6:2014(E)

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 19710

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0101 Parameter Get Supported Objects
Bytes 2-8 Reserved, set to FF16

D.15 Get Supported Objects response

This message is available in VT version 4 and later.

The VT uses this message to respond to a Get Supported Objects message.

The VT shall return a list of all supported object types including (see Table A.1 — Virtual terminal objects)

⎯ All object types that are mandatory for the VT to support.

⎯ All optional object types that the VT supports.

⎯ Proprietary object types that the VT supports, which may vary depending on the connected WS, or may
not be listed at all.

The VT and WS may decide by another means which proprietary objects may be supported.

In either case whether the VT lists the proprietary objects in this message or not, the VT may still decide to
reject the object pool from the WS because it included proprietary objects.

The WS may also decide by another means that it does not want to include the proprietary objects listed by
the VT in its object pool.

VTs shall not list Auxiliary Input Type 1 and Auxiliary Function Type 1 objects in the list of supported objects.

Non-proprietary objects that are not listed as supported by the VT shall still be parsed, but they shall not be
functionally supported by the VT. In this way, some Working Sets may choose to use the same object pool in
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both cases.

Transmission repetition rate: In response to Get Supported Objects message

Data length: Variable
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 19710

Bits 7 - 4 1100 Command Get Technical Data
Bits 3 - 0 0101 Parameter Get Supported Objects
Response
Bytes 2 Number of bytes to follow
(NOTE: For future compatibility, this is NOT necessarily the
number of Object Types)
Byte 3-n Numerically ascending sorted list of all Object Types supported
by the VT. Each Object Type is an unsigned integer
occupying a single byte. If the special value FF16 is found by
the WS during parsing, it indicates the end of the list, and all
following bytes should be ignored.

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 ISO 11783-6:2014(E)

Annex E
(normative)

Non-volatile memory operations commands

E.1 General

E.1.1 Introduction

The VT provides functions to store and to restore a complete Working Set-specific object pool. When
connecting to the VT, the Working Set can send a message to get its object pool copied from non-volatile
storage into volatile storage. The availability and organization of the non-volatile storage area is VT-specific.
Storing and restoring an object pool includes all object definitions. There shall be a method inside the VT to
assign a stored object pool uniquely to a specific Working Set. Dependant on the VT design, either only a
single object pool or an arbitrary number of pools can be managed for each Working Set. Each pool should be

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identified by a version label.

Version labels may be displayed to an operator and may be used as a file name. As such the Working Set
shall apply the following rules. Version labels shall be constructed of visible characters from font type zero
(See Table L.1 — ISO 8859-1 (Latin 1) character set). Version labels shall be padded with trailing blanks to
the defined version label size. In addition, the following characters shall not be used in a version label string:

\ [5C16] Reverse Solidus (Back slash)

“ [2216] Quotation mark (Double quote)
‘ [2716] Apostrophe (Single quote)
` [6016] Grave Accent (Back tic)
/ [2F16] Solidus (Forward slash)
: [3A16] Colon
* [2A16] Asterisk
< [3C16] Less-than sign
> [3E16] Greater-than sign
| [7C16] Vertical line
? [3F16] Question mark

In order to maintain different versions of object pools in the non-volatile storage of the VT, the Working Set
needs to detect those versions currently stored by the VT. It shall also determine if any of the available
versions are suitable for the Working Sets current software version before an object pool is copied into the
object buffer of the VT.

The Working Set should acquire the VT technical data to ensure the stored version is compatible with the
current characteristics. This allows the Working Set to account for changes in the VT characterstics from one
power cycle to another.

The Working Set shall be identified by the entire ISO NAME of the Working Set Master. Each Working Set
Master shall only be allowed to manipulate its own versions of object pools and shall not perform any of the
commands in this Annex on versions of object pools created by other Working Sets. Only Working Set
Masters (not Members) are allowed to send any of the commands in this annex.

NOTE Because non-volatile operations may take an indefinite amount of time to complete, the response message
may be delayed accordingly. Therefore the VT Status message shall reflect the current state of the VT (i.e. is busy). Only
when the VT has completed the non-volatile operations shall it send the response message.

The messages in this annex are not allowed in macros.

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 ISO 11783-6:2014(E)

E.1.2 Version Management – VT version 4 and prior

Version labels are defined as a seven character 8-bit string. The permissible messages do not include the
extended versions of the messages in this annex.

E.1.3 Version Management – VT version 5 and later

Version labels are defined as either a seven character 8-bit string, or a thirty-two character 8-bit string, and the
appropriate messages in this annex shall be used accordingly.

E.2 Get Versions message

The Get Versions message allows the Working Set to query the VT for existing seven-character version labels
associated with the requesting Working Set.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 22310

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 1111 Parameter Get Versions
Bytes 2-8 Reserved, set to FF16

E.3 Get Versions response

The VT sends all version labels contained in the non-volatile storage associated with the requesting Working
Set. If there is no version stored, the number of version strings is set to 0 and the remaining bytes in the
packet shall be set to FF16. Extended Transport Protocol and Transport Protocol are used when necessary.

Transmission repetition rate: In response to Get Versions message

Data length: Variable
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 22410

Bits 7 - 4 1110 Command Non Volatile Memory
Bits 3 - 0: 0000 Parameter Get Versions Response
Byte 2 Number of version strings to follow (each is 7 bytes)
Bytes 3 - n Version labels 7 character version strings, unused bytes filled with spaces. Only
8-bit Strings are allowed.

E.4 Store Version command

The Store Version command allows a Working Set to store the copy of the actual object pool into the non-
volatile storage of the VT. This message can be sent at any time. The copy is stored as the version indicated
by version label. If a copy with the same version label already exists in the non-volatile storage area, it is
overwritten. All objects are stored as they are (with current attributes, input values etc.). If the version label
contains no string (all blanks) the last stored version in non-volatile storage shall be overwritten; alternatively,
if there is no version stored up to that point, an error shall be indicated by the VT.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 20810

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0000 Parameter Store Version

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 ISO 11783-6:2014(E)

Bytes 2 – 8 Version label 7 character version string, unused bytes filled with spaces. Only
8-bit Strings are allowed.

E.5 Store Version response

The VT acknowledges whether the object pool was stored in the non-volatile storage.

Transmission repetition rate: In response to Store Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 20810

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0000 Parameter Store Version Response
Bytes 2-5 Reserved, set to FF16
Byte 6 Error Codes (0=no errors; successfully stored)
Bit 0 = Reserved
Bit 1 = 1 = Version label is not correct
Bit 2 = 1 = Insufficient memory available
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

E.6 Load Version command

The Load Version command allows a Working Set to load a copy of a object pool from the non-volatile storage
of the VT. If an object pool is already loaded it is overwritten. If the message is acknowledged positive by the
VT, the Working Set may proceed as if all objects had been transmitted normally. If the version label contains
no string (all blanks), the last stored version in non-volatile storage shall be loaded.

When the VT receives the Load Version command, it shall set the "parsing" bit in the VT Status message to 1
until it has finished parsing the object pool and sends the Load Version Response message.

The Working Set Master shall wait for the Load Version response until three consecutive VT Status messages
have been received where the "parsing" bit is set to 0. At that time, if the Load Version response has not been
received by the Working Set Master, then it shall assume that the Load Version command was not received
by the VT. Three messages are waited for to avoid race conditions created by a VT Status message that may
already be in a transmit queue, which does not correctly identify the parsing state.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 20910

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0001 Parameter Load Version
Bytes 2-8 Version label 7 character version string, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.

E.7 Load Version response

The VT acknowledges whether a copy was loaded from the non-volatile storage.
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Transmission repetition rate: In response to Load Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 20910

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 ISO 11783-6:2014(E)

Bits 7 - 4 1101 Command Non Volatile Memory

Bits 3 - 0 0001 Parameter Load Version Response
Bytes 2-5 Reserved, set to FF16
Byte 6 Error Codes (0=no errors; successfully loaded)
1
Bit 0 = 1 = File system error or pool data corruption
Bit 1 = 1 = Version label is not correct or Version label
unknown
Bit 2 = 1 = Insufficient memory available
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16
1
This bit exists in VT version 4 and later.

E.8 Delete Version command

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The Delete Version command allows a Working Set to delete a version of an object pool in the non-volatile
storage of the VT. If a copy of this version is in the volatile memory at the same time it is preserved there —
this message affects non-volatile storage only. If the version label contains no string (all blanks) the last stored
version in non-volatile storage is to be deleted.

NOTE To delete the object pool from volatile memory, see Clause F.44 Delete Object Pool command.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 21010

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0010 Parameter Delete Version
Bytes 2-8 Version label 7 character version string, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.

E.9 Delete Version response

The VT acknowledges whether a version was deleted in the non-volatile storage.

Transmission repetition rate: In response to Delete Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 21010

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0010 Parameter Delete Version Response
Bytes 2-5 Reserved, set to FF16
Byte 6 Error Codes (0=no errors; successfully deleted)
Bit 0 = Reserved
Bit 1 = 1 = Version label is not correct or Version label
unknown
Bit 2 = Reserved
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

E.10 Extended Get Versions message

The Get Versions message allows the Working Set to query the VT for existing extended version labels
associated with the requesting Working Set.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 21110

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0011 Parameter Extended Get Versions
Bytes 2-8 Reserved, set to FF16

NOTE This message is available in VT version 5 and later.

E.11 Extended Get Versions response

The VT sends all extended version labels contained in the non-volatile storage associated with the requesting
Working Set. If there is no version stored, the number of version strings is set to 0 and the remaining bytes in
the packet shall be set to FF16. Extended Transport Protocol and Transport Protocol are used when
necessary.

Transmission repetition rate: In response to Extended Get Versions message

Data length: Variable
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 21110

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0: 0011 Parameter Extended Get Versions
Byte 2 Number of version strings to follow (each is 32 bytes)
Bytes 3-n Version labels 32 character version strings, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.

NOTE This message is available in VT version 5 and later.

E.12 Extended Store Version command

The Extended Store Version command allows a Working Set to store the copy of the actual object pool into
the non-volatile storage of the VT. This message can be sent at any time. The copy is stored as the version
indicated by an extended version label. If a copy with the same version label already exists in the non-volatile
storage area, it is overwritten. All objects are stored as they are (with current attributes, input values etc.). If
the version label contains no string (all blanks) the last stored version in non-volatile storage shall be
overwritten; alternatively, if there is no version stored up to that point, an error shall be indicated by the VT.

Transmission repetition rate: On request

Data length: 33 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 21210

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0100 Parameter Extended Store Version
Bytes 2 - 33 Version label 32 character version string, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

NOTE This message is available in VT version 5 and later.

E.13 Extended Store Version response

The VT acknowledges whether the object pool was stored in the non-volatile storage.

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 ISO 11783-6:2014(E)

Transmission repetition rate: In response to Extended Store Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 21210

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0100 Parameter Extended Store Version
Bytes 2-5 Reserved, set to FF16
Byte 6 Error Codes (0=no errors; successfully stored)
Bit 0 = Reserved
Bit 1 = 1 = Version label is not correct
Bit 2 = 1 = Insufficient memory available
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

NOTE This message is available in VT version 5 and later.

E.14 Extended Load Version command

The Extended Load Version command allows a Working Set to load a copy of an object pool from the non-
volatile storage of the VT. If an object pool is already loaded it is overwritten. If the message is acknowledged
positive by the VT, the Working Set may proceed as if all objects had been transmitted normally. If the version
label contains no string (all blanks), the last stored version in non-volatile storage shall be loaded.

When the VT receives the Extended Load Version command, it shall set the "parsing" bit in the VT Status
message to 1 until it has finished parsing the object pool and sends the Extended Load Version Response
message.

The Working Set Master shall wait for the Extended Load Version response until three consecutive VT Status
messages have been received where the "parsing" bit is set to 0. At that time, if the Extended Load Version
response has not been received by the Working Set Master, then it shall assume that the Extended Load
Version command was not received by the VT. Three messages are waited for to avoid race conditions
created by a VT Status message that may already be in a transmit queue, which does not correctly identify the
parsing state.

Transmission repetition rate: On request

Data length: 33 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 21310

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0101 Parameter Extended Load Version
Bytes 2 - 33 Version label 32 character version string, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.

NOTE This message is available in VT version 5 and later.

E.15 Extended Load Version response

The VT acknowledges whether a copy was loaded from the non-volatile storage.

Transmission repetition rate: In response to an Extended Load Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 21310

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0101 Parameter Extended Load Version

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 ISO 11783-6:2014(E)

Bytes 2-5 Reserved, set to FF16

Byte 6 Error Codes (0=no errors; successfully loaded)
Bit 0 = 1 = File system error or pool data corruption
Bit 1 = 1 = Version label is not correct or Version label
unknown
Bit 2 = 1 = Insufficient memory available
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

NOTE This message is available in VT version 5 and later.

E.16 Extended Delete Version command

The Extended Delete Version command allows a Working Set to delete a version of an object pool in the non-
volatile storage of the VT. If a copy of this version is in the volatile memory at the same time it is preserved
there — this message affects non-volatile storage only. If the version label contains no string (all blanks) the
last stored version in non-volatile storage is to be deleted.

NOTE To delete the object pool from volatile memory, see Clause F.44 Delete Object Pool command.

Transmission repetition rate: On request

Data length: 33 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 21410

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0110 Parameter Extended Delete Version
Bytes 2 - 33 Version label 32 character version string, unused bytes shall be filled with
spaces. Only 8-bit Strings are allowed.
NOTE This message is available in VT version 5 and later.

E.17 Extended Delete Version response

The VT acknowledges whether a version was deleted in the non-volatile storage.

Transmission repetition rate: In response to Extended Delete Version command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 21410

Bits 7 - 4 1101 Command Non Volatile Memory
Bits 3 - 0 0110 Parameter Extended Delete Version
Bytes 2-5 Reserved, set to FF16
Byte 6 Error Codes (0=no errors; successfully deleted)
Bit 0 = Reserved
Bit 1 = 1 = Version label is not correct or Version label
unknown
Bit 2 = Reserved
Bit 3 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

NOTE This message is available in VT version 5 and later.

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 ISO 11783-6:2014(E)

Annex F
(normative)

Command and Macro messages

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F.1 General
Commands are sent from a Working Set to the VT using the PGNs given in Annex C. Working Set Masters or
members may send any command in this Annex. Additionally, the Identify VT message may be sent from one
VT to other VTs. The originator shall wait for a response up to a maximum of 1,5 s before sending another
command, unless stated otherwise. Each of the commands in the present annex can also be used in a Macro
unless otherwise noted. Working Set designers should recognize that the VT can take a significant amount of
time to respond to a command, especially if the command causes a display refresh (refer to the busy codes in
the VT Status message, in Clause G.2).

Unless otherwise noted any attribute in a response message which also exists in the command message shall
be set to the same value as in the command message, i.e. the response frame reflects the command but not
necessarily the state of the object.

Example: An Enable/Disable Object command is sent with Object Id = 11000 and Byte 4 = 0 (disable). The object is
currently in a state where it cannot be disabled, and therefore it stays enabled. The response frame is sent with Object Id
= 11000 and Byte 4 = 0 (disable) and Error Code indicating the cause of the error.

F.2 Hide/Show Object command

The Hide/Show Object command is used to hide or show a Container object. This pertains to the visibility of
the object as well as its remembered state. If the object cannot be displayed due to references to missing
objects, the VT generates an error in the response.
Transmission repetition rate: On request
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16010

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0000 Parameter Hide/Show object
Byte 2,3 Object ID
Byte 4 0 = Hide, 1 = Show
Byte 5-8 Reserved, set to FF16

F.3 Hide/Show Object response

The VT uses this message to respond to the Hide/Show Object command.
Transmission repetition rate: In response to Hide/Show Object command
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16010

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0000 Parameter Hide/Show object
Byte 2,3 Object ID
Byte 4 0 = Hide, 1 = Show

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 ISO 11783-6:2014(E)

Byte 5 Error Codes (0 = no errors)

Bit 0 = 1 = References to missing objects
Bit 1 = 1 = Invalid Object ID
Bit 2 = 1 = Command error
Bit 3 = undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 6-8 Reserved, set to FF16

F.4 Enable/Disable Object command

This command is used to enable or disable an input field object or a Button object and pertains to the
accessibility of an input field object or Button object. This command is also used to enable or disable an
Animation object.

It is allowed to enable already enabled objects and to disable already disabled objects. If this happens the
response frame shall indicate ‘no errors’ and macros shall be executed.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16110

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0001 Parameter Enable/Disable object
Byte 2,3 Object ID
Byte 4 0 = Disable, 1 = Enable
Byte 5-8 Reserved, set to FF16

F.5 Enable/Disable Object response

The VT uses this message to respond to the Enable/Disable Object command.

Transmission repetition rate: In response to an Enable/Disable Object command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16110

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0001 Parameter Enable/Disable Object
Byte 2,3 Object ID
Byte 4 0 = Disable, 1 = Enable
Byte 5 Error Codes (0 = no errors)
Bit 0 = Undefined, set to 0 recommended
Bit 1 = 1 = Invalid Object ID
Bit 2 = 1 = Command error
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Bit 3 = 1 = Could not complete. Operator input is active on

this object.
Bit 4 = 1 = Any other error
Bytes 6-8 Reserved, set to FF16

F.6 Select Input Object command

This command is used to force the selection of an input field, Button, or Key object. The VT shall provide a
way for the operator to recognize a selected object. If the object is disabled or not visible, an error code is

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 ISO 11783-6:2014(E)

returned. Depending on byte 4, the object is either selected (has focus) or opened for input (not valid for
Button objects or Key objects).

If the object to be selected is included multiple times on the same mask, it is proprietary to the VT which of the
object instances will be selected (has focus).

NOTE Even if the input field is activated for data input, the value shall not be changed by this command (e.g. Input
Boolean is not toggled).

NOTE This command originates in the Working Set and is a command to the VT. In the situation where the change
originates with the operator, the VT indicates the selected input object with the VT Select Input Object message (see
Clause H.8).

NOTE VT version 3 and prior do not support selection of a Button object or a Key object.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16210

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0010 Parameter Select Input object
Byte 2, 3 Object ID – NULL indicates that no object shall be selected (i.e.
focus is removed)
Byte 4 Option
FF16 = Set Focus to object referenced by Object ID
0 = Activate for data-input the object referenced by Object ID
(invalid for Button object or Key object and may have no
effect for the Input Boolean object depending on the VT
design)
NOTE: Value 0 available only on VT Version 4 and later.
Byte 5-8 Reserved, set to FF16

F.7 Select Input Object response

The VT uses this message to respond to the Select Input Object command.

Transmission repetition rate: In response to a Select Input Object command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16210

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0010 Parameter Select Input object
Bytes 2, 3 Object ID
Byte 4 Response
0 = Object referenced by Object ID is not selected or Object
ID is the NULL object
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1 = Object referenced by Object ID is Selected

1
2 = Object referenced by Object ID is Opened for Edit

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 ISO 11783-6:2014(E)

Byte 5 Error Codes (0 = no errors)

Bit 0 = 1 = Object is disabled
Bit 1 = 1 = Invalid Object ID
Bit 2 = 1 = Object is not on the active mask or object is in a
hidden container
Bit 3 = 1 = Could not complete. Another Input field is
currently being modified, or a Button or Soft Key is currently
being held.
Bit 4 = 1 = Any other error
1
Bit 5 = 1 = Invalid Option value

NOTE: An object that is off-screen or zero width or zero height, and

is enabled and not within a hidden container, is both selectable and
able to be opened for edit. This is not an error condition.
Bytes 6 - 8 Reserved, set to FF16
1
These bits/values exist in VT version 4 and later.

F.8 ESC command

This command is used to abort operator input.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

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Allowed in a Macro: No

Byte 1 VT function = 14610

Bits 7 - 4 1001 Command Command
Bits 3 - 0 0010 Parameter ESC
Byte 2-8 Reserved, set to FF16

F.9 ESC response

The VT uses this message to respond to the ESC command.

Transmission repetition rate: In response to ESC command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 14610

Bits 7 - 4 1001 Command Command
Bits 3 - 0 0010 Parameter ESC
Byte 2,3 Object ID where input was aborted if no error code
Byte 4 Error Codes (0 = no errors)
Bit 0 = 1 = No input field is open for input, ESC ignored.
Bits 1-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.10 Control Audio Signal command

This command may be used to control the audio on the VT. When received this message shall terminate any
audio in process from the originating ECU and replace the previous command with the new command. The
previous rule does not apply to an acoustic signal associated with an Alarm Mask. There may be a momentary
interruption in the tone while the VT terminates the previous command.

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 ISO 11783-6:2014(E)

Continuous tones are not recommended, however it is recognized that 255 activations of 65,535 ms each
produces 278 minutes of continuous tone. If this is insufficient, the originating ECU may issue an additional
Control Audio Signal command to the VT prior to the expiration of the tone.

If the VT is capable of supporting the Control Audio Signal command for only a single ECU at a time, then the
Control Audio Signal response shall indicate that the Audio Device is busy. The audio produced by a control
audio command shall never be queued or delayed beyond normal VT message processing. See Figure F.1 —
Acoustic signal termination

Key
1 Working Set 1 sends Control Audio Device command with a total time of 10 seconds.
2 Working Set 2 alarm becomes visible and has acoustic signal other than “none”. VT terminates Working Set 1 audio
and informs Working Set 1. VT proprietary acoustic requires 4 seconds.

Figure F.1 — Acoustic signal termination

If the VT is capable of supporting the Control Audio Signal command for more than a single ECU at a time,
then the audio for each Working Set is not interrupted. See Figure F.2 — Acoustic signal with multisound

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Key
1 Working Set 1 sends Control Audio Device command with a total time of 10 seconds.
2 Working Set 2 alarm becomes visible and has acoustic signal other than “none”. VT proprietary acoustic requires 4
seconds.

Figure F.2 — Acoustic signal with multisound

NOTE The Control Audio Signal command is independent of the currently active Working Set, therefore audio tones
can be commanded whether the originating ECU is the active Working Set, or not. (See Clause 4.6.14 Alarm handling)

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16310

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0011 Parameter Control Audio
Byte 2 Activations
0 = Terminates any audio in process from the originating
ECU (Frequency and Duration values are ignored).
1 – 255 = Number of Audio Activations.
Byte 3,4 Frequency in Hz If the Frequency specified is outside of the VT
capabilities for production of sound (also applies to non-
multiple frequency devices) then the VT limits the frequency
to the reproducible range.
Byte 5,6 On-time duration in ms. If the duration specified is less than the
VT capabilities for timing, the VT shall time the audio to the
VTs smallest controlled value
Byte 7,8 Off-time duration in ms. If the duration specified is less than the
VT capabilities for timing, the VT shall time the audio to the
VTs smallest controlled value

F.11 Control Audio Signal response

This message is sent by the VT in response to a control audio command.

Transmission repetition rate: In response to Control Audio Signal command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16310

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0011 Parameter Control Audio
Byte 2 Error Codes (0=no errors)
Bit 0 = 1 = Audio device is busy
Bits 1-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Byte 3-8 Reserved, set to FF16

F.12 Set Audio Volume command

This command can be used to control the audio on the VT.

This command applies to subsequent Control Audio Signal commands (See Clause F.10) of the issuing
Working Set. This command should also affect the currently playing tone, if any. VTs that are not able to
modify the volume of the currently playing tone shall set the Audio device is busy bit in the response. This
command should not affect in any way the volume settings of other Working Sets and shall not affect the
volume of Alarm Masks.

In VT version 4 and prior, the default audio volume was undefined.

In VT version 5 and later, the default audio volume is 100% of maximum volume set by the operator.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16410

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0100 Parameter Set Audio Volume
Byte 2 Percent (0 -100 %) of maximum volume set by operator
Byte 3-8 Reserved, set to FF16

F.13 Set Audio Volume response

This message is sent by the VT in response to a Set Audio Volume command.
Transmission repetition rate: In response to Set Audio Volume command
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16410

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0100 Parameter Set Audio Volume
Byte 2 Error Codes (0=no error)
Bit 0 = 1 = Audio device is busy, subsequent commands use
the new setting
1
Bit 1 = 1 = Command is not supported
Bits 2-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Byte 3-8 Reserved, set to FF16
1
This bit exists in VT version 5 and later.

F.14 Change Child Location command

The Change Child Location command is used to change the position of an object. The new position is set
relative to the object's current position. Since the object can be included in many parent objects, the parent
Object ID is also included. If a parent object includes the child object multiple times, then each instance will be
moved. When the object is moved, the parent object shall be refreshed. The position attributes given in the
message have an offset of −127 (i.e. value of 0 = a −127 pixel move, 255 = a +128 pixel move). Positive
values indicate a position change down (Y) or to the right (X). Negative values indicate a position change up
(Y) or to the left (X).
Because of the possibility of lost messages, when a guaranteed position is required, the Change Child
Position command should be used instead of specifying relative coordinates with the Change Child Location
command.
Transmission repetition rate: On request
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16510

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0101 Parameter Change Child Location
Bytes 2,3 Parent Object ID
Bytes 4,5 Object ID of object to move
Byte 6 Relative change in X position
Byte 7 Relative change in Y position
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 ISO 11783-6:2014(E)

Byte 8 Reserved, set to FF16

F.15 Change Child Location response

This message is sent by the VT in response to a Change Child Location command.
Transmission repetition rate: In response to Change Child Location command
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16510

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0101 Parameter Change Child Location
Bytes 2,3 Parent Object ID
Bytes 4,5 Object ID of object to move
Byte 6 Error Codes (0=no error)
Bit 0 = 1 = Invalid Parent Object ID
Bit 1 = 1 = Invalid Object ID
Bit 2,3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

F.16 Change Child Position command

The Change Child Position command is used to change the position of an object. The new position is set
relative to the parent object's position. Since the object can be included in many parent objects, the parent
Object ID is also included. If a parent object includes the child object multiples times, then each instance will
be moved to the same location (the designer may want to use Change Child Location command to move all
instances in a relative motion). When the object is moved, the parent object shall be refreshed. The position
attributes given in the message are signed integer. Positive values indicate a position below (Y) or to the right
of (X) the top left corner of the parent object. Negative values indicate a position above (Y) or to the left of (X)
the top left corner of the parent object.

Transmission repetition rate: On request

Data length: 9 bytes
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18010

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0100 Parameter Change Child Position
Bytes 2,3 Parent Object ID
Bytes 4,5 Object ID of object to move
Bytes 6,7 New X position relative to the top left corner of parent object.
Bytes 8,9 New Y position relative to the top left corner of parent object.

F.17 Change Child Position response

This message is sent by the VT in response to the Change Child Position command.

Transmission repetition rate: In response to Change Child Position command

Data length: 8 bytes
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Parameter group number: VT to ECU, Destination-Specific

Allowed in a Macro: No

Byte 1 VT function = 18010

Bits 7 - 4 1011 Command Command

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Bits 3 - 0 0100 Parameter Change Child Position

Bytes 2,3 Parent Object ID
Bytes 4,5 Object ID of object to move
Byte 6 Error Codes (0=no error)
Bit 0 = 1 = Invalid Parent Object ID
Bit 1 = 1 = Invalid Object ID
Bit 2,3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

F.18 Change Size command

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The Change Size command is used to change the size of an object. A value of 0 for width or height or both
means that the object size is 0 and the object is not drawn.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16610

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0110 Parameter Change Size
Bytes 2,3 Object ID of object to size
Bytes 4,5 New width
Bytes 6,7 New height
Byte 8 Reserved, set to FF16

F.19 Change Size response

This message is sent by the VT in response to a Change Size command.

Transmission repetition rate: In response to Change Size command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16610

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0110 Parameter Change Size
Bytes 2,3 Object ID of object to size
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = Undefined, set to 0 recommended
Bit 2 = Undefined, set to 0 recommended
Bit 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.20 Change Background Colour command

This command is used to change the background colour of an object.

NOTE Version 4 and later VTs may support a means to transform the colour table into alternate mapping. (See
Clause B.17 Colour Map object)

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Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16710

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0111 Parameter Change Background Colour
Bytes 2,3 Object ID of object to change
Byte 4 New Background colour (See Clause A.3 VT standard colour
palette)
Bytes 5-8 Reserved, set to FF16

F.21 Change Background Colour response

This message is sent by the VT in response to a Change Background Colour command.

Transmission repetition rate: In response to Change Background Colour command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16710

Bits 7 - 4 1010 Command Command
Bits 3 - 0 0111 Parameter Change Background Colour
Bytes 2,3 Object ID
Byte 4 New Background colour (See A.3 VT standard colour palette)
Byte 5 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid colour code
Bits 2 - 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 6-8 Reserved, set to FF16

F.22 Change Numeric Value command

This command is used to change the value of an object. It applies only to objects that have a numeric “value”
attribute. The size of the object shall not be changed by this command. Only the object indicated in the
command is to be changed, variables referenced by the object are not changed.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16810

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1000 Parameter Change Numeric Value
command
Bytes 2,3 Object ID of object to change
Byte 4 Reserved, set to FF16

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 ISO 11783-6:2014(E)

Bytes 5-8 New value for value attribute. Size depends on object type.
Objects of size 1 byte are found in byte 5. Objects of size
2 bytes are found in bytes 5 - 6. Values greater than 1 byte
are transmitted little endian (LSB first). Unused bytes shall be
filled with zero.
Input Boolean object: 1 byte for TRUE/FALSE
Input Number object: 4 bytes for integer input
Input List object: 1 byte for list index
Output Number object: 4 bytes for integer output
1
Output List object : 1 byte for list index
Output Meter object: 2 bytes for integer value
Output Linear Bar Graph object: 2 bytes for integer value
Output Arched Bar Graph object: 2 bytes for integer value
Number Variable object: 4 bytes for integer value
Object Pointer object: 2 bytes for Object ID
2
External Object Pointer object : Bytes 5-6:
External Reference NAME
object ID
Bytes 7-8:
Referenced Object ID
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2
Animation object : 1 byte for list index

1
VT version 4 and later.
2
VT version 5 and later.

The frequency of update is at the discretion the Working Set designer; however the designer should consider
the limited bandwidth available (see Clause 4.6.10.1).

F.23 Change Numeric Value response

The VT sends this message in response to the Change Numeric Value command.

Transmission repetition rate: In response to Change Numeric Value command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16810

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1000 Parameter Change Numeric Value
command
Bytes 2,3 Object ID
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
3
Bit 1 = 1 = Invalid value
1
Bit 2 = 1 = Value in use (e.g. open for input)
Bit 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error

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 ISO 11783-6:2014(E)

Bytes 5-8 Value. Size depends on object type. Objects of size 1 byte are
found in byte 5. Objects of size 2 bytes are found in bytes 5 -
6. Values greater than 1 byte are transmitted little endian
(LSB first):
Input Boolean object: 1 byte for TRUE/FALSE
Input Number object: 4 bytes for integer input
Input List object: 1 byte for list index
Output Number object: 4 bytes for integer output
1
Output List object : 1 byte for list index
Output Meter object: 2 bytes for integer value
Output Linear Bar Graph object: 2 bytes for integer value
Output Arched Bar Graph object: 2 bytes for integer value
Number Variable object: 4 bytes for integer value
Object Pointer object: 2 bytes for Object ID
2
External Object Pointer object : Bytes 5-6:
External Reference NAME
object ID
Bytes 7-8:
Referenced Object ID
2
Animation object : 1 byte for list index
1
VT version 4 and later.
2
VT version 5 and later.
3
This bit is only set when the Change Numeric Value command is used to change a pointer value to an
invalid object.

F.24 Change String Value command

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

This command is used to change the value of an object. It applies only to objects that have a string “value”
attribute. The size of the object shall not be changed by this command. Only the object indicated in the
command is to be changed, variables referenced by the object are not changed.

If the message contents fit in a single packet, transport protocol shall not be used. If the transferred string has
a length of 3 bytes or less, the remaining bytes in the single packet message shall be set to FF16.

The transferred string is allowed to be smaller than the length of the value attribute of the target object and in
this case the VT shall pad the value attribute with space characters. The number of bytes in the transfer string
(Bytes 4,5) shall be less than or equal to the length attribute of the target object (i.e. string length shall not be
increased).

Transmission repetition rate: On request

Data length: Variable
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17910

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0011 Parameter Change String Value
Bytes 2,3 Object ID of the object to change
Bytes 4,5 Total number of bytes in the string to transfer (bytes to follow)
Bytes 6-n New string value

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 ISO 11783-6:2014(E)

F.25 Change String Value response

This message is sent by the VT in response to the Change String Value message.

Transmission repetition rate: In response to Change String Value message

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17910

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0011 Parameter Change String Value
Bytes 2,3 Reserved, set to FF16
Byte 4,5 Object ID of the object to change
Byte 6 Error Codes (0=no error)
Bit 0 = Undefined, set to 0 recommended
Bit 1 = 1 = Invalid Object ID
Bit 2 = 1 = String too long
Bit 3 = 1 = Any other error
1
Bit 4 = 1 = Value in use (e.g. open for input)
Bytes 7,8 Reserved, set to FF16
1
VT version 4 and later.

F.26 Change End Point command

This command is used to change the end point of an Output Line object by changing the width, height and/or
line direction attributes.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 16910

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1001 Parameter Change End Point
Bytes 2,3 Object ID of an Output Line object to change
Bytes 4,5 Width in pixels.
Bytes 6,7 Height in pixels
Byte 8 Line Direction (refer to Output Line object attributes)

F.27 Change End Point response

The VT uses this message to respond to the Change End Point command.

Transmission repetition rate: In response to Change End Point command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 16910

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1001 Parameter Change End Point
Bytes 2,3 Object ID
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`

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 ISO 11783-6:2014(E)

Byte 4 Error Codes (0=no error)

Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid Line Direction
Bit 2 = Undefined, set to 0 recommended
Bit 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.28 Change Font Attributes command

This command is used to change the Font Attributes in a Font Attributes object.
NOTE: Version 4 and later VTs may support a means to transform the colour table into alternate mapping. (See
Clause B.17 Colour Map object)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17010

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1010 Parameter Change Font Attributes
Bytes 2,3 Object ID of object to change
Byte 4 Font colour (See A.3 VT standard colour palette).
Byte 5 Font size
Byte 6 Font type
Byte 7 Font style
Byte 8 Reserved, set to FF16

F.29 Change Font Attributes response

The VT uses this message to respond to the Change Font Attributes command.

Transmission repetition rate: In response to the Change Font Attributes command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17010

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1010 Parameter Change Font attributes
Bytes 2,3 Object ID
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid colour
Bit 2 = 1 = Invalid size
Bit 3 = 1 = Invalid type
Bit 4 = 1 = Invalid style
Bit 5 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.30 Change Line Attributes command

This command is used to change the Line Attributes in a Line Attributes object.
NOTE: Version 4 and later VTs may support a means to transform the colour table into alternate mapping. (See Clause
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

B.17 Colour Map object)

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17110

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1011 Parameter Change Line Attributes
Bytes 2,3 Object ID of object to change
Byte 4 Line Colour (See A.3 VT standard colour palette).
Byte 5 Line Width
Bytes 6,7 Line Art
Byte 8 Reserved, set to FF16

F.31 Change Line Attributes response

The VT uses this message to respond to the Change Line Attributes command.

Transmission repetition rate: In response to the Change Line Attributes command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17110

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1011 Parameter Change Line Attributes
Bytes 2,3 Object ID
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid colour
Bit 2 = 1 = Invalid width
Bit 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.32 Change Fill Attributes command

This command is used to change the Fill Attributes in a Fill Attributes object.

NOTE Version 4 and later VTs may support a means to transform the colour table into alternate mapping. (See
Clause B.17 Colour Map object)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17210

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1100 Parameter Change Fill Attributes
Bytes 2,3 Object ID of object to change
Byte 4 Fill Type
Byte 5 Fill Colour (See A.3 VT standard colour palette)
Bytes 6,7 Fill Pattern Object ID
Byte 8 Reserved, set to FF16
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

F.33 Change Fill Attributes response

The VT uses this message to respond to the Change Fill Attributes command.

Transmission repetition rate: In response to Change Fill Attributes command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17210

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1100 Parameter Change Fill Attributes
Bytes 2,3 Object ID
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid type
Bit 2 = 1 = Invalid colour
Bit 3 = 1 = Invalid pattern Object ID
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.34 Change Active Mask command

This command is used to change the active mask of a Working Set to either a Data Mask object or an Alarm
Mask object.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17310

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1101 Parameter Change Active Mask
Bytes 2,3 Working Set Object ID
Byte 4,5 New Active Mask Object ID
Bytes 6-8 Reserved, set to FF16
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

F.35 Change Active Mask response

The VT uses this message to respond to the Change Active Mask command. (See Clause H.14 VT Change
Active Mask)

Transmission repetition rate: In response to Change Active Mask command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17310

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1101 Parameter Change Active Mask
Byte 2,3 New Active Mask Object ID
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Working Set Object ID
Bit 1 = 1 = Invalid Mask Object ID
Bit 2 = Undefined, set to 0 recommended
Bit 3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error

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 ISO 11783-6:2014(E)

Bytes 5-8 Reserved, set to FF16

F.36 Change Soft Key Mask command

This command is used to change the Soft Key Mask associated with a Data Mask object or an Alarm Mask
object.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17410

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1110 Parameter Change Soft Key Mask
Byte 2 Mask Type (1=Data, 2 = Alarm)
Bytes 3,4 Data or Alarm Mask Object ID
Byte 5,6 New Soft Key Mask Object ID
Bytes 7,8 Reserved, set to FF16

F.37 Change Soft Key Mask response

The VT uses this message to respond to the Change Soft Key Mask command. (See also Clause H.16 VT
Change Soft Key Mask)

Transmission repetition rate: In response to Change Soft Key Mask command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17410

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1110 Parameter Change Soft Key Mask
Bytes 2,3 Data or Alarm Mask Object ID
Bytes 4,5 New Soft Key Mask Object ID
Byte 6 Error Codes (0=no error)
Bit 0 = 1 = Invalid Data or Alarm Mask Object ID
Bit 1 = 1 = Invalid Soft Key Mask Object ID
Bit 2 = 1 = Missing Objects
Bit 3 = 1 = Mask or child object has errors
Bit 4 = 1 = Any other error
Bytes 7,8 Reserved, set to FF16

F.38 Change Attribute command

This command is used to change any attribute with an assigned AID. This message cannot be used to change
strings.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17510

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1111 Parameter Change Attribute
Bytes 2,3 Object ID of object to change
Byte 4 Attribute ID (AID)

228 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Bytes 5-8 New value for attribute. Size depends on attribute data type.
Values greater than 1 byte are transmitted little endian (LSB
first). Unused bytes should be set to zero:
Boolean: 1 byte for TRUE/FALSE
Integer: 1, 2 or 4 bytes as defined in
object tables
Float: 4 bytes
Bitmask: 1 byte

F.39 Change Attribute response

The VT uses this message to respond to the Change Attribute command.

Transmission repetition rate: In response to Change Attribute command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17510

Bits 7 - 4 1010 Command Command
Bits 3 - 0 1111 Parameter Change Attribute
Bytes 2,3 Object ID
Byte 4 Attribute ID (AID)
Byte 5 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid Attribute ID
Bit 2 = 1 = Invalid value
1
Bit 3 = 1 = Value in use (e.g. open for input)
Bit 4 = 1 = Any other error
Bytes 6 - 8 Reserved, set to FF16
1
VT version 4 and later.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

F.40 Change Priority command

This command is used to change the priority of an Alarm Mask. This command causes the VT to evaluate the
priority of all active masks and may cause a change to a different mask if the Alarm Mask being changed
should either become the active Working Set and mask, or should no longer be the active Working Set and
mask.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17610

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0000 Parameter Change Priority
Bytes 2,3 Object ID of Alarm Mask
Byte 4 New priority
Bytes 5-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

F.41 Change Priority response

The VT uses this message to respond to the Change Priority command.

Transmission repetition rate: In response to Change Priority

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Byte 1 VT function = 17610
Bits 7 - 4 1011 Command Command
Bits 3 - 0 0000 Parameter Change Priority
Bytes 2,3 Object ID of Alarm Mask
Byte 4 New priority
Byte 5 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid priority
Bits 2-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 6-8 Reserved, set to FF16

F.42 Change List Item command

1 2
This command is used to change a list item in an Input List object, Output List object , Animation object , or
2
External Object Definition object .
Transmission repetition rate: On request
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 17710

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0001 Parameter Change List Item
Bytes 2,3 Object ID of an Input List object, Output List object, Animation
object, or External Object Definition object
Byte 4 List Index (items are numbered 0-n)
Bytes 5,6 New Object ID or FFFF16 to set empty item
Bytes 7,8 Reserved, set to FF16
1
VT version 4 and later.
2
VT version 5 and later.

F.43 Change List Item response

The VT uses this message to respond to the Change List Item command.
Transmission repetition rate: In response to Change List Item command
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17710

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0001 Parameter Change List Item
1
Bytes 2,3 Object ID of an Input List object or Output List object ,
2 2
Animation object , or External Object Definition object

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 ISO 11783-6:2014(E)

Byte 4 List Index (items are numbered 0-n)

Bytes 5,6 New Object ID or FFFF16 to set empty item
Byte 7 Error Codes (0=no error)
Bit 0 = 1 = Invalid Input List object ID or Output List object
1 2 2
ID , Animation object , External Object Definition object
Bit 1 = 1 = Invalid List Index
Bit 2 = 1 = Invalid New List Item Object ID
1
Bit 3 = 1 = Value in use (e.g. open for input)
Bit 4 = 1 = Any other error
Byte 8 Reserved, set to FF16
1
VT version 4 and later.
2
VT version 5 and later.

F.44 Delete Object Pool command

This command is used to delete the entire object pool of this Working Set from volatile storage. This command
may be used by an implement when it wants to move its object pool to another VT, or when it is shutting down
or during the development of object pools.
NOTE To delete an object pool from non-volatile storage in the VT, See Clause E.8 Delete Version command

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17810

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0010 Parameter Delete Object Pool
Bytes 2-8 Reserved, set to FF16

F.45 Delete Object Pool response

The VT uses this message to respond to the Delete Object Pool command.
Transmission repetition rate: In response to Delete Object Pool command
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 17810

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0010 Parameter Delete Object Pool
Byte 2 Error Codes (0=no error, deletion was successful)
Bit 0 = 1 = Deletion error
Bits 1-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 3–8 Reserved, set to FF16

F.46 Lock/Unlock Mask command

This command is used by a Working Set to disallow or allow screen refreshes at the VT for the visible Data
Mask or User-Layout Data Mask owned by the requesting Working Set. This message would be used when a
series of changes need to be synchronized or made visually atomic (for example during animation). A Lock
command does not imply that drawing stops, only that changes to the visible mask are not made visible to an
operator until one of the unlock mechanisms listed below occurs:

231
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

⎯ An Unlock command is received and the visible mask has been refreshed
⎯ A timeout occurs based on the timeout attribute of the Lock message
⎯ Navigation to, or activation of input objects or Buttons on the Data Mask
⎯ A change from visible to hidden mask occurs
⎯ The pool is deleted
⎯ A proprietary reason (e.g. an input dialog closes)

When a mask is locked, the on screen presentation of the mask is not updated for any reason. This includes
flashing objects and any animation object that is on the mask. If the Animation object is a timed animation, the
timer will continue to run normally in the background, the animation object will be updated on the non-visible
copy of the mask, but the on screen presentation is not updated until the mask is unlocked.

While locked, CAN messages/commands, key and button presses, events and macros are still processed
normally. When one of the unlock mechanisms occurs, a response message is sent and normal periodic
screen refreshes resume. The lock state does not apply to Soft Key Masks and Alarm Masks which shall be
displayed regardless.

If an Alarm Mask from any Working Set is active when the lock command is received, the lock command is
rejected if the active Alarm Mask is in the same display area.

The VT shall respond as soon as possible to a Lock Mask command. The VT’s response to the Unlock
command depends on whether or not a Data Mask or User-Layout Data Mask is visible. If a Data Mask or
User-Layout Data Mask is hidden (e.g. VT is displaying a home page, setup screen etc), the VT shall respond
to the Unlock command immediately and indicate that the command was ignored. However, if a Data Mask or
User-Layout Data Mask is visible, the VT shall not respond to the Unlock Mask command until the Data Mask
or User-Layout Data Mask has been completely refreshed (all changes during lock made visible to the
operator). If a timeout occurs or a change causing the current Data Mask or User-Layout Data Mask to be
hidden, the VT shall send an unsolicited Lock/Unlock Mask Response message with appropriate error codes
set.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Typically the Working Set would lock the mask, send any necessary change commands, unlock the mask and
then wait for the Lock/Unlock Mask Response message. This will allow mask changes to be synchronized
and made visually atomic. To avoid operator interface lags, navigation problems and timing fluctuations in
flashing objects, it is recommended that locks be applied for very short periods of time, likely measured in (but
not limited to) milliseconds.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18910

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1101 Parameter Lock/Unlock Mask
Byte 2 Command:
0 = Unlock Data Mask or User-Layout Data Mask
1 = Lock Data Mask or User-Layout Data Mask
Bytes 3, 4 Object ID of the Data Mask or User-Layout Data Mask to Lock or
Unlock. If this does not match the visible mask, the command
fails with a response code.
Bytes 5, 6 Lock timeout in ms or zero for no timeout. Once this period
expires, the VT shall automatically release the lock if the
Working Set has not done so. This attribute does not apply to
an Unlock command.
Bytes 7, 8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

F.47 Lock/Unlock Mask response

The VT uses this message to respond to the Lock/Unlock Mask command or to send an unsolicited message
with the reasons given in the Lock/Unlock Mask command (See F.46).

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Lock/Unlock Mask command

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific
Allowed in a Macro: No

Byte 1 VT function = 18910

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1101 Parameter Lock/Unlock Mask
Byte 2 Command:
0 = Unlock Data Mask or User-Layout Data Mask
1 = Lock Data Mask or User-Layout Data Mask
Byte 3 Error Codes (0=no error)
Bit 0 = 1 = Command ignored, no mask is visible or given
Object ID does not match the visible mask
Bit 1 = 1 = Lock command ignored, already locked
Bit 2 = 1 = Unlock command ignored, not locked
Bit 3 = 1 = Lock command ignored, an Alarm Mask is active
Bit 4 = 1 = Unsolicited unlock, timeout occurred
Bit 5 = 1 = Unsolicited unlock, this mask is hidden
Bit 6 = 1 = Unsolicited unlock, operator induced, or any other
error
Bit 7 = 1 = Any other error
Bytes 4-8 Reserved, set to FF16

F.48 Execute Macro command

This command is used to execute a Macro.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 19010

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1110 Parameter Execute Macro
Byte 2 Object ID of Macro object
Bytes 3-8 Reserved, set to FF16

F.49 Execute Macro response

The VT uses this message to respond to the Execute Macro command.

NOTE This message is available in VT version 4 and later.

© ISO 2014 – All rights reserved

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`--- 233
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 ISO 11783-6:2014(E)

Transmission repetition rate: In response to Execute Macro command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 19010

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1110 Parameter Execute Macro
Byte 2 Object ID of Macro object
Byte 3 Error Codes (0=no error)
Bit 0 = 1 = Object ID does not exist
Bit 1 = 1 = Object ID is not a Macro object
Bit 2 = 1 = Any other error

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Bytes 4-8 Reserved, set to FF16

F.50 Change Object Label command

This command is used by an ECU to change a label of an object. See also B.21 Object Label Reference List
object.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18110

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0101 Parameter Change Object Label
Bytes 2-3 Object ID of object to associate label with
Bytes 4-5 Object ID of a String Variable object that contains the label string
(32 characters maximum) or FFFF16 if no text is supplied
Byte 6 Font type (See Annex L) (ignored if String Variable object
reference is NULL or the string contains a WideString (See
Clause 4.6.19.7 String encoding).
Bytes 7, 8 Object ID of an object to be used as a graphic representation of
the object label or FFFF16 if no designator supplied. When
the VT draws this object it shall be clipped to the size of a
Soft Key designator. (See Table A.2 — Allowed hierarchical
relationships of objects)

F.51 Change Object Label response

This message is sent in response to the Change Object Label command.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Change Object Label command

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific
Allowed in a Macro: No

Byte 1 VT function = 18110

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0101 Parameter Change Object Label

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 ISO 11783-6:2014(E)

Byte 2 Error Codes (0=no error)

Bit 0 = 1 = Invalid object id
Bit 1 = 1 = Invalid String Variable object id
Bit 2 = 1 = Invalid font type
Bit 3 = 1 = No Object Label Reference List object available in
object pool
Bit 4 = 1 = Designator references invalid objects
Bit 5 = 1 = Any other error
Bytes 3-8 Reserved, set to FF16

F.52 Change Polygon Point command

This command is used by a Working Set to modify a point in an Output Polygon object.

NOTE This message is available in VT version 4 and later.

NOTE To avoid repetitive polygon draws in the case where several points need to be changed, Working Sets could
use the Lock/Unlock Mask command before changing the points.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18210

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0110 Parameter Change Polygon Point
Bytes 2, 3 Object ID of the Output Polygon object to change
Byte 4 Point index of the point to replace.
NOTE: The first point in the polygon point list is at index zero (0).
Bytes 5, 6 New X value of a point relative to the top left corner of the
polygon
Bytes 7, 8 New Y value of a point relative to the top left corner of the
polygon

F.53 Change Polygon Point response

The VT uses this message to respond to the Change Polygon Point command.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Change Polygon Point command

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific
Allowed in a Macro: No

Byte 1 VT function = 18210

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0110 Parameter Change Polygon Point
Bytes 2, 3 Object ID of the Output Polygon object to change
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid point index
Bit 2 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

© ISO 2014 – All rights reserved --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

235
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 ISO 11783-6:2014(E)

F.54 Change Polygon Scale command

This command is used by a Working Set to change the scale of a complete Output Polygon object. This
message causes the value of the polygon points to be changed. For consistent implementation, the following
algorithm shall be used to calculate the new points.

It is similar to the Change Size command except that is also causes the VT to rescale the polygon points.
When the VT receives this message, it shall change the enclosing area of the polygon (i.e. width and height
attributes) and shall adjust all polygon point positions using the following 32 bit signed integer algorithm:

Using signed 32 bit integer math:

if ( old_x < 0 ) then
new_x = ((old_x * new_width) - (old_width / 2)) / old_width
else
new_x = ((old_x * new_width) + (old_width / 2)) / old_width
endif

if ( old_y < 0 ) then

new_y = ((old_y * new_height) - (old_height / 2)) / old_height
else

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
new_y = ((old_y * new_height) + (old_height / 2)) / old_height
endif

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18310

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0111 Parameter Change Polygon Scale
Bytes 2, 3 Object ID of a Output Polygon object to scale
Bytes 4, 5 New width attribute
Bytes 6, 7 New height attribute
Byte 8 Reserved, set to FF16

F.55 Change Polygon Scale response

The VT uses this message to respond to the Change Polygon Scale command.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Change Polygon Scale command

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific
Allowed in a Macro: No

Byte 1 VT function = 18310

Bits 7 - 4 1011 Command Command
Bits 3 - 0 0111 Parameter Change Polygon Scale
Bytes 2, 3 Object ID of Output Polygon object
Bytes 4, 5 New width attribute
Bytes 6, 7 New height attribute

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 ISO 11783-6:2014(E)

Byte 8 Error Codes (0=no error)

Bit 0 = 1 = Invalid object id
Bits 1-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error

F.56 Graphics Context command

This command is used to manipulate a graphics Context object (only on version 4 or later VTs). For
messages larger than 8 bytes, Transport Protocol is used. Commands smaller than 8 bytes shall be padded to
8 bytes with FF16. The graphics drawn by this command shall be clipped to the size of the canvas. If drawing
commands place the graphics cursor outside the defined area of the object, the VT shall clip the drawing to
the defined edges of the object but shall move the graphics cursor to the new end position outside the bounds
of the object. The drawing rules for these graphics commands are the same as the drawing rules for normal
VT Objects as specified in Clause B.10 (for example always using a 'square' brush).

For drawing, the foreground colour specified is either the foreground colour attribute of the Graphics Context
Object, or the Line Colour specified in the Line Attributes object. Which one is used is determined by the state
of Options bit 1.

For drawing, the background colour specified is either the background colour attribute of the Graphics Context
Object, or the Fill Colour specified in the Fill Attributes object. Which one is used is determined by the state
of Options bit 1.

For drawing text, the foreground colour specified is either the foreground colour attribute of the Graphics
Context Object, or the Font colour specified in the Font Attributes object. Which one is used is determined by
the state of Options bit 1.

For zooming, a zoom value of 1.0 means no magnification or a 1:1 mapping of pixels of the viewport to the
canvas. A zoom value of 2.0 means 2:1 magnification (or zoom in), 3.0 means 3:1 magnification etc. A zoom
value of 0.5 means 1:2 demagnification (or zoom out), 0.25 means 1:4 demagnification etc.

When zooming in, for example, a zoom value of 3.0 for 3:1 magnification, each pixel of the canvas is

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
displayed in the viewport as 3 pixels wide and 3 pixels high.

When zooming out, for example, a zoom value of 0.25 for 1:4 demagnification, each block of 4 pixels wide by
4 pixels high of the canvas are displayed in the viewport as a single pixel. The exact zooming algorithm is VT
proprietary. A closest colour match may be used by the VT when merging or stretching pixels.

Only the viewport is zoomed – not the canvas. The Viewport X and Viewport Y positions are in reference to
the unzoomed canvas. This means that the zoom anchor point is the upper left corner of the viewport.
Zooming without moving the Viewport X and Viewport Y positions, gives the appearance of stretching the
image from the top left towards the bottom right.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: Variable
Parameter group number: ECU to VT, destination specific
Allowed in a Macro: Yes

Byte 1 VT function = 18410

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1000 Parameter Graphics Context Command
Bytes 2, 3 Object ID of a Graphics Context object
Byte 4 Sub-Command ID
Bytes 5-n Parameters based on sub-command ID byte

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 ISO 11783-6:2014(E)

Table F.1 — Graphic command summary

Sub- Description Parameters Parameter Range

Command
ID
0 Set Graphics Cursor: Bytes 5 - 6 = X -32768 to +32767
This command alters the graphics cursor X/Y attributes position
of the object.
Bytes 7 - 8 = Y -32768 to +32767
position

1 Move Graphics Cursor: Bytes 5 - 6 = X offset -32768 to +32767

This command alters the graphics cursor X/Y attributes
of the object by moving it relative to its current
position. Bytes 7 - 8 = Y offset -32768 to +32767

2 Set Foreground Colour: Byte 5 = Foreground 0 to 255 depending

This command modifies the foreground colour colour on VT’s colour depth
attribute. The graphics cursor is not moved.
3 Set Background Colour: Byte 5 = Background 0 to 255 depending
This command modifies the background colour colour on VT’s colour depth
attribute. The graphics cursor is not moved.
4 Set Line Attributes Object ID: Bytes 5 - 6 = Object 0 to 65534, 65535
This command modifies the Output Line object ID of a Line Attributes
attribute. All drawing commands that follow use the Object or NULL for
new attribute value. For line suppression, set the line suppression.
Object ID to NULL. The graphics cursor is not moved.
5 Set Fill Attributes Object ID: Bytes 5 - 6 = Object 0 to 65534, 65535
This command modifies the fill object attribute. All ID of a Fill Attributes
drawing commands that follow use the new attribute Object or NULL for no
value. For no filling, set the Object ID to NULL. The further filling
graphics cursor is not moved.
6 Set Font Attributes Object ID: Bytes 5 - 6 = Object 0 to 65534, 65535
This command modifies the font object attribute. All ID of a Font Attributes
drawing commands that follow use the new attribute Object or NULL for no
value. If text is not being used, the object can be set to Font Attributes
NULL. The graphics cursor is not moved.
7 Erase Rectangle: Bytes 5 - 6 = Width 0 to 65535
Fills the rectangle at the graphics cursor using the
current background colour. For this command, the Fill
Attributes Object is not used regardless of the state of Bytes 7 - 8 = Height 0 to 65535
Options bit 1 The graphics cursor is moved to the
bottom right pixel inside of the rectangle.
8 Draw Point: Bytes 5 - 6 = X offset -32768 to +32767
Sets the pixel to the foreground colour. The graphics of pixel relative to the
cursor is moved to the defined point. Graphics Cursor X
Bytes 7 - 8 = Y offset -32768 to +32767
of pixel relative to the
Graphics Cursor Y
9 Draw Line: Bytes 5 - 6 = X offset -32768 to +32767
Draws a line from the graphics cursor to the specified of end pixel relative to
end pixel using the foreground colour. The Output Line the Graphics Cursor X
Object drawing rules apply with respect to the end Bytes 7 - 8 = Y offset -32768 to +32767
pixel location and Line Attributes. The graphics cursor of end pixel relative to
is moved to the specified end pixel.

238--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Sub- Description Parameters Parameter Range

Command
ID
the Graphics Cursor Y
10 Draw Rectangle: Bytes 5 - 6 = Width 0 to 65535
Draws a rectangle at the graphics cursor. The
Rectangle Object drawing rules apply. If a Line
Attributes object is currently defined, the border is Bytes 7 - 8 = Height 0 to 65535
drawn. If a fill attribute object is currently defined, the
rectangle is filled. The graphics cursor is moved to the
bottom right pixel inside of the rectangle.
11 Draw Closed Ellipse: Bytes 5 - 6 = Width 0 to 65535
Draws a closed ellipse bounded by the rectangle
defined by the current graphics cursor location and the
width and height given. The Output Ellipse object Bytes 7 - 8 = Height 0 to 65535
drawing rules apply. If a Line Attributes object is
currently defined, the border is drawn. If a fill attribute
object is currently defined, the ellipse is filled. The
graphics cursor is moved to the bottom right pixel
inside of the bounding rectangle.
12 Draw Polygon: Byte 5 = Number of 0 to 255
Draws a polygon from the graphics cursor to the first polygon points to
point, then to the second point and so on. The polygon follow
is closed if the last point has the offset 0,0. This is Bytes 6-7 = First point -32768 to +32767
because offset 0,0 gives the coordinates of the original offset X value relative
graphics cursor which was used as the first point in the to the Graphics
polygon. If the data does not close the polygon, no Cursor X (signed)
automatic closing is performed and filling is ignored.
Foreground colour is used for the border colour. The Bytes 8-9 = First point -32768 to +32767
Output Polygon object drawing rules apply. If a Line offset Y value relative
Attributes object is currently defined, the border is to the Graphics
drawn. If a fill object is currently defined and the Cursor Y (signed)
polygon is closed, the polygon is filled. The graphics …
cursor is moved to the last point in the list.
{ list of points
continues starting at
byte 10 with each
point requiring 4 bytes
of data}
13 Draw Text: Byte 5: 0 = Opaque, 1 0 or 1
Draws the given text using the Font Attributes object. = Transparent.
Any flashing bits in the Font style of the Font Attributes Byte 6 = Number of 0 to 255
object are ignored If opaque, the background colour bytes to follow
attribute is used. The graphics cursor is moved to the
bottom right corner of the extent of the text. Bytes 7 – n = Text
string. The text can be
either 8-bit or
WideString (See
Clause 4.6.19.7 String
encoding).
14 Pan Viewport: Bytes 5 - 6 = Viewport -32768 to +32767
This command modifies the viewport X and Y X attribute
attributes and forces a redraw of the object. This Bytes 7 - 8 = Viewport -32768 to +32767
allows “panning” of the underlying object contents. The Y attribute
graphics cursor is not moved.
15 Zoom Viewport: Byte 5 - 8 = “zoom” -32.0 to +32.0
This command allows magnification of the viewport value (Float numeric).
contents. See section on zooming for meaning of the
zoom value. The graphics cursor is not moved.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Sub- Description Parameters Parameter Range

Command
ID
16 Pan and Zoom Viewport: Bytes 5 - 6 = Viewport -32768 to +32767
This command allows both panning and zooming at X attribute
the same time combining commands 14 and 15. Bytes 7 - 8 = Viewport -32768 to +32767
Y attribute
Byte 9-12 = “zoom” -32.0 to +32.0
value (Float numeric).

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
17 Change Viewport Size: Bytes 5 - 6 = New 0 to 65535
This command changes the size of the viewport and width
can be compared to the normal Change Size Bytes 7 - 8 = New 0 to 65535
command. The graphics cursor is not moved. height

NOTE: The size of the object (i.e. the memory used)

cannot be changed.
18 Draw VT Object: Bytes 5 - 6 = Object 0 to 65534
This command draws the VT Object specified by the ID of object to draw
Object ID in bytes 5 - 6 at the current graphics cursor
location (top left corner). Any drawable object may be
specified with the exception of the Graphics Context
object specified in bytes 2 - 3 or any object that
contains this Graphics Context object (circular
references are not allowed). The object shall be drawn
using the current value and state of that object at the
time the command was specified (for instance,
enabled or disabled), except flashing bitmaps which
are drawn regardless of their flashing state. A focus
indicator, however, shall not be drawn even if the
specified object (or any child object) has focus at that
time. Also, if the object is being edited by the operator,
it shall be drawn as if it is not being edited, using the
last accepted value of the object (not a temporary
value that the operator is still entering). The graphics
cursor is moved to the bottom right corner of the object
that was drawn. Normal VT Object transparency rules
apply when drawing the VT Object onto the canvas.
Any colours outside of the colours allowed by this
Graphics Context Object (Table B.41 — Picture
Graphic attributes and record format) shall be treated
as transparent.
19 Copy Canvas to Picture Graphic: Bytes 5 - 6 = Object 0 to 65534
This command copies the current canvas of the ID of Picture Graphic
Graphics Context Object into the Picture Graphic object to copy to
Object specified by the Object ID in bytes 5 - 6. If the
Picture Graphic is smaller than the canvas, then it shall
be clipped to fit within the Picture Graphic. If the
Picture Graphic is larger than the canvas, then the
extra pixels in the Picture Graphic are not changed.
Colours in the Canvas that are set to the transparency
colour in the Graphics Context Object are not copied
and the corresponding pixels in the Picture Graphic
are not changed. The picture graphic shall have at
least the same number of colours as the Graphics
Context Object.
Any colours outside of the colours allowed by this
Picture Graphic Object (Table B.41 — Picture Graphic
attributes and record format) shall be treated as

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 ISO 11783-6:2014(E)

Sub- Description Parameters Parameter Range

Command
ID
transparent.
20 Copy Viewport to Picture Graphic: Bytes 5 - 6 = Object 0 to 65534
This command copies the current Viewport (zoomed or ID of Picture Graphic
panned) of the Graphics Context Object into the object to copy to
Picture Graphic Object specified by the Object ID in
bytes 5 - 6. If the Picture Graphic is smaller than the
Viewport, then it shall be clipped to fit within the
Picture Graphic. If the Picture Graphic is larger than
the Viewport, then the extra pixels in the Picture
Graphic are not changed. Colours in the Viewport that
are set to the transparency colour in the Graphics
Context Object are not copied and the corresponding
pixels in the Picture Graphic are not changed. The
picture graphic shall have at least the same number of
colours as the Graphics Context Object.
Any colours outside of the colours allowed by this
Picture Graphic Object (Table B.41 — Picture Graphic
attributes and record format) shall be treated as
transparent.

F.57 Graphics Context response

The VT uses this message to respond to the Graphics Context command.

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
NOTE This message is available in VT version 4 and later.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific
Allowed in a Macro: No

Byte 1 VT function = 18410

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1000 Parameter Graphics Context Command
Bytes 2, 3 Object ID of a Graphics Context object
Byte 4 Sub-command ID
Byte 5 Error codes (0 = no errors)
Bit 0 = 1 = Invalid Object ID or object is not a Graphics
Context object
Bit 1 = 1 = Invalid sub-command id
Bit 2 = 1 = Invalid parameter
Bit 3 = 1 = Sub command will produce invalid results
Bit 4 = 1 = Any other error
Bytes 6-8 Reserved, set to FF16

F.58 Get Attribute Value message

This command is used by a Working Set to query the VT for the current state of objects within the VT.

NOTE This message is available in VT version 4 and later.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 18510

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1001 Parameter Get Attribute Value
Bytes 2, 3 Object ID
Byte 4 Attribute ID of the Object
Bytes 5-8 Reserved, set to FF16

F.59 Get Attribute Value response

The VT uses this message to respond to a Get Attribute Value message.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Get Attribute Value message

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 18510

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1001 Parameter Get Attribute Value Response
Bytes 2, 3 Object ID or FFFF16 to indicate an error response
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Byte 4 Attribute ID of the Object

No Error Response:
Bytes 5 - 8 Current value of the attribute. Size depends on attribute data
type. Values greater than 1 byte are transmitted little endian
(LSB first):
Boolean: 1 byte for TRUE/FALSE
Integer: 1, 2 or 4 bytes as defined in
object tables
Float: 4 bytes
Bitmask: 1 byte
Error Response:
Bytes 5, 6 Object ID
Byte 7 Error Codes (0=no error)
Bit 0 = 1 = Invalid Object ID
Bit 1 = 1 = Invalid Attribute ID
Bits 2, 3 = Reserved, set to 0
Bit 4 = 1 = Any other error
Byte 8 Reserved, set to FF16

F.60 Select Colour Map command

The Select Colour Map command is used to select the active Colour Map. This command can take a long time
to execute. The command applies to any presentation from the originating Working Set, which includes
objects that may be shown on other Working Set screens (e.g. Auxiliary Control objects as may be presented
on VT proprietary and other Working Set masks using the Auxiliary Control Designator Type 2 Object Pointer).

NOTE This message is available in VT version 4 and later.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 18610

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1010 Parameter Select Colour Map
Bytes 2,3 Object ID of the Colour Map object, or FFFF16 to restore the
default colour table. (See A.3 VT standard colour palette)
Bytes 4-8 Reserved, set to FF16

NOTE If the selected Colour Map object is modified the changes shall take effect immediately.

F.61 Select Colour Map response

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Select Colour Map command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Byte 1 VT function = 18610

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1010 Parameter Select Colour Map
Bytes 2,3 Object ID of the Colour Map object
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Invalid object id
Bit 1 = 1 = Invalid Colour Map
Bit 2 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

NOTE A VT can take a long time to process this command. The response message shall be delayed until this activity
completes. The VT Status message shall reflect the current state of the VT (is busy executing a command).

F.62 Identify VT message

The Identify VT message may be sent by either Working Sets or VTs. Upon receipt of this message and only if
no Alarm Mask is currently active, the VT shall display, for a period of 3 seconds, the VT Number (See Clause
3 Terms and definitions). This message is intended to be sent Destination-Global, however it may be sent
Destination-Specific.

The presentation of the VT Number is considered VT proprietary and the VT designer may choose to present
other information indicating the purpose of the VT Number (See Clause 4.6.25 VT Number).

The VT Number shall be in the range of 1 to 32, corresponding to Function Instances 0 to 31. VTs may then
be referenced as VT Number 1, VT Number 2, etc.

VT Number = VT Function Instance + 1

NOTE The offset of 1 is in support of operators, which may not be familiar with a zero-based numbering system.

NOTE This message is available in VT version 4 and later.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Global (Destination-Specific)
Allowed in a Macro: No

Byte 1 VT function = 18710

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1011 Parameter Identify VT
Bytes 2-8 Reserved, set to FF16

F.63 Identify VT response

The VT uses this message to respond to the Identify VT message if it was received Destination-Specific.

NOTE This message is available in VT version 4 and later.

Transmission repetition rate: In response to Identify VT message

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 18710

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1011 Parameter Identify VT
Bytes 2-8 Reserved, set to FF16

F.64 Execute Extended Macro command

This command is used to execute a Macro.

NOTE This message is available in VT version 5 and later.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: Yes

Byte 1 VT function = 18810

Bits 7 - 4 1011 Command Command
Bits 3 - 0 1100 Parameter Execute Extended Macro
Byte 2,3 Object ID of Macro object
Bytes 4-8 Reserved, set to FF16

F.65 Execute Extended Macro response

The VT uses this message to respond to the Execute Extended Macro command.

NOTE This message is available in VT version 5 and later.

Transmission repetition rate: In response to Execute Extended Macro command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 18810

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

Bits 7 - 4 1011 Command Command

Bits 3 - 0 1100 Parameter Execute Extended Macro
Byte 2,3 Object ID of Macro object
Byte 4 Error Codes (0=no error)
Bit 0 = 1 = Object ID does not exist
Bit 1 = 1 = Object ID is not a Macro object
Bit 2 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

F.66 Unsupported VT Function message

The Working Set uses this message to inform the VT that the Working Set attempted to process a VT to ECU
message with a VT function that the Working Set does not support. The Unsupported VT function identified in
Byte 2 is the value from Byte 1 of the message that was received. There is no response to this message.

NOTE This message is available in VT version 5 and later.

NOTE This is not a response to the VT Unsupported VT Function message.

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Transmission repetition rate: In response to a not supported Command/parameter

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 25310

Bits 7 – 4 1111 Command Status
Bits 3 – 0 1101 Parameter Unsupported function
Byte 2 Unsupported VT function
Bits 7 – 4 Command
Bits 3 – 0 Parameter
Bytes 3–8 Reserved, set to FF16

F.67 VT Unsupported VT Function message

The VT uses this message to inform the Working Set that the VT attemped to process an ECU to VT message
with a VT function that the VT does not support. The Unsupported VT function identified in Byte 2 is the value
from Byte 1 of the message that was received. There is no response to this message.

NOTE This message is available in Working Sets designed to support VT version 5 and later.

NOTE This is not a response to the Unsupported VT Function message.

Transmission repetition rate: In response to a not supported Command/parameter

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific
Allowed in a Macro: No

Byte 1 VT function = 25310

Bits 7 – 4 1111 Command Status
Bits 3 – 0 1101 Parameter Unsupported function
Byte 2 Unsupported VT function
Bits 7 – 4 Command
Bits 3 – 0 Parameter
Bytes 3–8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

Annex G
(normative)

Status Messages

G.1 General
The status messages allow the Working Set to determine the health of the VT and to monitor the progress of
tasks in the VT. They also allow the VT to monitor the health of Working Sets. These messages are not part of
object pools and are not allowed in macros.

G.2 VT Status message

The VT Status message shall be sent to the Global Address to declare the active Working Set Master which is
both displayed AND has the input focus (it "owns" the VT).

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For VT version 4 and later, a Working Set Master shall listen to this message in conjunction with the VT On
User-Layout Hide/Show message (See Clause H.20) to determine if it is displayed by the VT.

Data traffic with the VT shall not proceed after initialization until the VT Status message is sent from the VT.
(See Clause 4.6.9 Connection management for more information on connection management.) The VT Status
message is sent on change of any of Bytes 2 to 6, or Byte 7 bit 6, and once per second, up to a maximum of
five per second.

Transmission repetition rate: On change of any of Bytes 2 to 6, or Byte 7 bit 6, and once per
second up to 5 messages per second
Data length: 8 bytes
Parameter group number: VT to Global Address

Byte 1 VT function = 25410

Bits 7 - 4 1111 Command Status
Bits 3 - 0 1110 Parameter VT Status message
Byte 2 Source Address of active Working Set Master (“owns” VT)
Bytes 3,4 Object ID of the visible Data/Alarm Mask of the active Working
Set
Bytes 5,6 Object ID of the visible Soft Key Mask of the active Working Set
Byte 7 VT busy codes VT busy codes
Bit 0 = 1 = VT is busy updating visible mask
Bit 1 = 1 = VT is busy saving data to non-volatile memory
Bit 2 = 1 = VT is busy executing a command
Bit 3 = 1 = VT is busy executing a Macro
1
Bit 4 = 1 = VT is busy parsing an object pool
Bit 5 = Reserved, set to 0
1
Bit 6 = 1 = Auxiliary controls learn mode active
Bit 7 = 1 = VT is out of memory
Byte 8 VT Function code VT function code of current command being executed (valid only
if command or Macro busy code is set)
1
These bits exist in VT version 3 and later.

G.3 Working Set Maintenance message

Each Working Set Master shall send a Working Set Maintenance message cyclically each second to the VT.
(See Clause 4.6.9 Connection management for more information on connection management.)

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 ISO 11783-6:2014(E)

As there are no means for a Working Set member to report its own version number, all members of the
Working Set shall comply to the same version number as reported by the master. For example, a Working Set
Master may report a Version Number that matches the lowest compliant device in the Working Set. The
master and members may use proprietary messages to determine their compliance.

Transmission repetition rate: Once per second

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 25510

Bits 7 - 4 1111 Command Status
Bits 3 - 0 1111 Parameter Working Set Maintenance
message
Byte 2 BitMask Version 3 and later:
Bit 0 = 1 = Initiating Working Set maintenance (once at
startup)
Bits 1 - 7 = Reserved, set to 0
Version 2:
Reserved, set to FF16
Byte 3 Version Number The ISO11783-6 version that this Working Set meets
0-2 Reserved
3 Compliant with VT Version 3
4 Compliant with VT Version 4
5 Compliant with VT Version 5
6 – FE16 Reserved
FF16 Compliant with VT Version 2
and prior
Bytes 4-8 Reserved, set to FF16

NOTE The Version Number reported in this message determines how the VT responds to commands and messages.
See Clause 4.6.2 Working Sets.

NOTE The Version Number parameter reported by the Working Set Master shall reflect the version of this standard
to which the Working Set (master and members) is designed. It shall not change at runtime due to adaptations to different
VTs. For example, a version 4 Working Set Master would still report version 4 in this parameter, even if the Working Set
falls back to version 3 behavior to upload an object pool to a version 3 VT. The VT may choose to report this or provide it
for diagnostics, but shall not reject communication or the object pool based on the reported Version Number.

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 ISO 11783-6:2014(E)

Annex H
(normative)

Activation messages

H.1 General
Unsolicited messages are sent from the VT to the Working Set Master using the PGNs given in Annex C. The
Working Set Master may send a response message. All response messages in this annex are optional unless
specifically stated otherwise.

H.2 Soft Key Activation message

The Soft Key Activation message allows the VT to transmit operator selection of a Soft Key or the alarm ACK
means. If a key is held and the interval between messages exceeds 300 ms, then the ECU should process as
if the key was released. (See Clause 4.6.18 Soft Key and Button activation) If the VT has a means to abort the
key press, it shall send the Key press aborted activation code instead of the Key press released activation
code. (e.g. Press button on touch screen, slide finger off side of button, abort is sent).

Transmission repetition rate: On key press/release and every 200 ms when key is held.
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 010

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0000 Parameter Soft Key
Byte 2 Key activation code
0 = Key has been released (state change)
1 = Key has been pressed (state change)
2 = Key is still pressed
1
3 = Key press aborted
Bytes 3,4 Object ID Object ID of Key object
Bytes 5,6 Parent Object ID Object ID of visible Data Mask, Alarm Mask, or in the case
where the Soft Key is in a visible Key Group, the Object ID of
the Key Group Object
Byte 7 Key number Soft key code:
0 = alarm ACK
1-255 = Key code assigned by Working Set Master
Byte 8 Reserved, set to FF16

1
Applies to VT version 4 and later.

H.3 Soft Key Activation response

Transmission repetition rate: Optionally, in response to Soft Key Activation message message
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 010

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0000 Parameter Soft Key
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,

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 ISO 11783-6:2014(E)

Byte 2 Key activation Code Key activation code

0 = Key has been released (state change)
1 = Key has been pressed (state change)
2 = Key is still held
1
3 = Key press aborted
Bytes 3,4 Object ID Object ID of Key object
Bytes 5,6 Parent Object ID Object ID of visible Data Mask, Alarm Mask, or in the case
where the Soft Key is in a visible Key Group, the Object ID of
the Key Group Object
Byte 7 Key number Soft key code
Byte 8 Reserved, set to FF16

1
Applies to VT version 4 and later.

H.4 Button Activation message

The Button Activation message allows the VT to transmit operator selection of a Button object to the Working
Set Master. If a non-latchable Button is held and the interval between messages exceeds 300 ms, then the

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ECU should process as if the Button was released. (See Clause 4.6.18 Soft Key and Button activation). If the
VT has a means to abort the Button press, it shall send the Button press aborted activation code instead of
the Button press released activation code. (e.g. Press button on touch screen, slide finger off side of button,
abort is sent).

Transmission repetition rate: On button press/release and every 200 ms when button is held.
Latchable buttons do not repeat.
Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 110

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0001 Parameter Button
Byte 2 Key activation Code Key activation code
0 = Button has been unlatched or released (state change)
1 = Button has been “pressed” or latched (state change)
2 = Button is still held (latchable buttons do not repeat)
1
3 = Button press aborted
Bytes 3,4 Object ID Object ID of Button object
Bytes 5,6 Parent Object ID Object ID of parent Data Mask or in the case where the Button is
in a visible Window Mask object, the Object ID of the Window
Mask object
Byte 7 Key Number Button key code
Byte 8 Reserved, set to FF16
1
Applies to VT version 4 and later.

H.5 Button Activation response

Transmission repetition rate: Optionally, in response to Button Activation message
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 110

Bits 7 - 4 0000 Command Control Element function
Bits 3 - 0 0001 Parameter Button

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 ISO 11783-6:2014(E)

Byte 2 Key activation code Key activation code

0 = Button has been unlatched or released (state change)
1 = Button has been “pressed” or latched (state change)
2 = Button is still held (latchable buttons do not repeat)
1
3 = Button press aborted
Bytes 3,4 Object ID Object ID of Button object
Bytes 5,6 Parent Object ID Object ID of parent Data Mask or in the case where the Button is
in a visible Window Mask object, the Object ID of the Window
Mask object
Byte 7 Key number Button key code
Byte 8 Reserved, set to FF16
1
Applies to VT version 4 and later.

H.6 Pointing Event message

The Pointing Event message is used to indicate that a position in the Data Mask area was touched or clicked
or dragged if the VT supports a touch screen or pointing device.

⎯ This message is not used when a button or input object is touched or clicked on. In this case, the Button
Activation message or VT Select Input Object message is sent.

VT version 4 and later have the additional requirements:

⎯ If held and the interval between messages exceeds 300 ms, then the ECU should process as if released.

⎯ If the VT has a means to support dragging (detect changing coordinates while held) and if the first press
is not on a button or input field and the drag operation subsequently crosses a button or input field this
message shall continue to be sent. It shall not activate the button or input field.

⎯ If the VT has a means to support dragging then the X, Y position shall update to reflect the current
coordinates. (See Clause D.9 Byte 4 bit 1 and bit 5 are set to 1)

⎯ If the VT does not have a means to support dragging but the VT can detect individual press and release
coordinates then the X, Y position while held shall repeat the coordinates at the press position. (See
Clause D.9 Byte 4 bit 1 is set to 1 and bit 5 is cleared to 0)

⎯ If the VT can only detect the press coordinates then the X, Y position in all states is the coordinates at the
press position. (See Clause D.9 Byte 4 bit 1 and bit 5 are cleared to 0)

Transmission repetition rate: On press/release and every 200 ms when held.

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 210

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Bits 7 - 4 0000 Command Control Element Function

Bits 3 - 0 0010 Parameter Pointing Event
Bytes 2,3 X Position X Position in pixels relative to top left corner of Data Mask area
Bytes 4,5 Y Position Y Position in pixels relative to top left corner of Data Mask area
Byte 6 Touch State
VT Version 3 and prior:
Reserved, set to FF16 (Pressed event implied)
VT Version 4 and later:
0 = Released
1 = Pressed
2 = Held
Bytes 7, 8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

H.7 Pointing Event response

Transmission repetition rate: Optionally, in response to Pointing Event message
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 210

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0010 Parameter Pointing Event
Bytes 2,3 X Position X Position in pixels relative to top left corner of Data Mask area
Bytes 4,5 Y Position Y Position in pixels relative to top left corner of Data Mask area
Byte 6 Touch State
VT Version 3 and prior:
Reserved, set to FF16 (Pressed event implied)
VT Version 4 and later:
0 = Released
1 = Pressed
2 = Held
Bytes 7, 8 Reserved, set to FF16

H.8 VT Select Input Object message

This message is sent by the VT any time an input field, Button, or Key object is selected (gets focus),
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

deselected (loses focus), opened for edit or closed after edit by the operator or an ESC command.

This message may not be sent if the input object that was activated had a complete transaction applied to it as
an atomic operation (e.g. an Input Boolean where the activation simply toggles the value, or an Input Number
where the VT has dedicated increment by 1 and decrement by 1 capability).

NOTE This command originates in the VT as a result of operator interaction. This message is not sent if the Working
Set requested the change in focus with the Select Input Object command (See Clause F.6).

NOTE When a Button or Key Object is the target of selection, it shall not be reported as open for input.

NOTE VT version 3 and prior do not support selection of a Button object or a Key object.

Transmission repetition rate: On selection of input object

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 310

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0011 Parameter VT Select Input object
Bytes 2,3 Object ID
Byte 4 Selection
0 = object is deselected,
1 = object is selected (has focus)
Byte 5 VT Version 3 and prior
Reserved, set to FF16
VT Version 4 and later
Bitmask
Bit 0 = 1 = object is open for data input – Byte 4 shall be set
to 1
Bits 1-7 = Reserved, set to 0
Bytes 6-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

H.9 VT Select Input Object response

The ECU uses this message to optionally respond to the VT Select Input Object message.

Transmission repetition rate: Optionally, in response to VT Select Input Object message

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 310

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0011 Parameter VT Select Input object
Bytes 2,3 Object ID
Byte 4 Selection
0 = object is deselected,
1 = object is selected (has focus)
Byte 5 VT Version 4 and prior
Reserved, set to FF16
VT Version 5 and later
Bitmask
Bit 0 = 1 = object is open for data input – Byte 4 shall be set
to 1
Bits 1-7 = Reserved, set to 0
Bytes 6-8 Reserved, set to FF16

H.10 VT ESC message

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This message is sent by the VT any time the operator presses the ESC means, and when the VT closes an
open input field due to a Change Active Mask command.

Transmission repetition rate: On ESC means press

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 410

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0100 Parameter VT ESC
Byte 2,3 Object ID where input was aborted if no error code
Byte 4 Error Codes (0 = no errors)
Bit 0 = 1 = No input field is selected (this bit is only used
when the VT has a permanent ESC means)
Bits 1-3 = Undefined, set to 0 recommended
Bit 4 = 1 = Any other error
Bytes 5-8 Reserved, set to FF16

H.11 VT ESC response

The ECU uses this message to optionally respond to the VT ESC message.

Transmission repetition rate: Optionally, in response to VT ESC message

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 410

Bits 7 - 4 0000 Command Control Element function
Bits 3 - 0 0100 Parameter VT ESC
Bytes 2,3 Object ID where input was aborted if no error code
Bytes 4-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

H.12 VT Change Numeric Value message

The VT sends this message any time the operator enters a numeric value for an input object or variable,
regardless of whether or not the value changed. This message is not sent if the input was aborted (in this case
a VT ESC message would be sent instead). For input objects that have a numeric variable reference, the
Object ID of the numeric variable object is used in this message.

Transmission repetition rate: On change value of numeric object

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 510

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0101 Parameter VT Change Numeric Value message
Bytes 2,3 Object ID
Byte 4 Reserved, set to FF16
Bytes 5-8 Value.
Size depends on object type. Objects of size 1 byte are found
in byte 5. Objects of size 2 bytes are found in bytes 5 - 6.
Values greater than 1 byte are transmitted little endian (LSB
first). Unused bytes shall be filled with zero.

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Input Boolean: 1 byte for TRUE/FALSE
Input Number: 4 bytes for integer input
Input List: 1 byte for list index
Number variable: 4 bytes for integer value
NOTE For VT version 4 and prior, byte 4 was not defined

H.13 VT Change Numeric Value response

The ECU uses this message to optionally respond to the VT Change Numeric Value message.

Transmission repetition rate: Optionally, in response to VT Change Numeric Value message

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 510

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0101 Parameter VT Change Numeric Value message
Bytes 2, 3 Object ID
Byte 4 Reserved, set to FF16
Bytes 5-8 Value copied from VT Change Numeric Value message.

H.14 VT Change Active Mask message

The VT sends this message if there are missing object references or errors when a Data Mask, Alarm Mask,
Window Mask or Key Group is displayed, or prior to deletion of pool due to a mask error. Since the actual
display of a mask can occur at any time, this message is used by the VT to report errors during the actual
drawing of the mask.

If the error results in object pool deletion, the VT will react to this Working Set as if the VT had detected an
unexpected shutdown of this Working Set. (See Clause 4.6.9)

Note The Change Active Mask response message, also sent by the VT, only acknowledges that the Change Active
Mask command was received and processed and while it has a similar name, it is for a different purpose.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On error

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 610

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0110 Parameter VT Change Active Mask
Bytes 2, 3 Active mask Object ID or Window Mask Object ID or Key Group
Object ID
Byte 4 Error codes (0=no error)
Bit 0 = Undefined, set to 0 recommended
Bit 1 = Undefined, set to 0 recommended
Bit 2 = 1 = Missing objects
Bit 3 = 1 = mask or child object has errors
Bit 4 = 1 = Any other error
Bit 5 = 1 = Pool being deleted
Bytes 5, 6 Object ID containing error
Bytes 7, 8 Parent Object ID of error Object ID

H.15 VT Change Active Mask response

The ECU uses this message to optionally respond to the VT Change Active Mask message.

Transmission repetition rate: Optionally, in response to VT Change Active Mask message

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 610

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0110 Parameter VT Change Active Mask
Bytes 2,3 Active mask Object ID
Bytes 4-8 Reserved, set to FF16

H.16 VT Change Soft Key Mask message

The VT sends this message if there are missing object references or errors when a Soft Key Mask is
displayed, or prior to deletion of pool due to a Soft Key Mask error. The Change Soft Key Mask response
message, also sent by the VT, only acknowledges that the Change Soft Key Mask command was received
and processed. Since the actual display of the mask can occur later, especially if an Alarm Mask currently has
the display, this message is used by the VT to report errors during the actual drawing of the Soft Key Mask.

Transmission repetition rate: On error

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 710

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0111 Parameter VT Change Soft Key Mask
Bytes 2,3 Data or Alarm Mask Object ID
Bytes 4,5 Soft Key Mask Object ID
Bytes 6 Error Codes (0=no error)
Bit 0 = Undefined, set to 0 recommended
Bit 1 = Undefined, set to 0 recommended
Bit 2 = 1 = Missing objects
Bit 3 = 1 = Mask or child object has errors
Bit 4 = 1 = Any other error
1
Bit 5 = 1 = Pool being deleted (this bit is always set)

254 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Bytes 7,8 Reserved, set to FF16

1
VT version 5 and later.

H.17 VT Change Soft Key Mask response

The ECU uses this message to optionally respond to the VT Change Soft Key Mask message.

Transmission repetition rate: Optionally, in response to the VT Change Soft Key Mask
message
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 710

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 0111 Parameter VT Change Soft Key Mask
Bytes 2,3 Data or Alarm Mask Object ID
Bytes 4,5 Soft Key Mask Object ID
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Bytes 6-8 Reserved, set to FF16

H.18 VT Change String Value message

The VT uses this message to transfer a string entered into an

Input String object or referenced String Variable object. The VT shall not remove leading spaces but it may
pad the string with spaces to the size defined in the object pool. If the

Input String object references a String Variable object, the Object ID of the String Variable object is used in
this message instead of the object id of the

Input String object.

If the message contents fit in a single packet, transport protocol shall not be used. If the transferred string has
a length of 3 bytes or less, the remaining bytes in the single packet message shall be set to FF16.

NOTE When transport protocol is used to communicate the new value, the Working Set may receive other messages
(e.g. the VT Select Input Object message indicating closure of data input, or Soft Key Activation message) prior to the
completion of the transport protocol transaction.

Transmission repetition rate: On change of value of an

Input String object

Data length: Variable
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 810

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 1000 Parameter VT Change String Value
Bytes 2, 3 Object ID of the
Input String object or String Variable object
Byte 4 Total number of bytes in the string to transfer
Bytes 5 - n Entered string value

H.19 VT Change String Value response

The ECU uses this message to optionally respond to the VT Change String Value message

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Transmission repetition rate: Optionally, in response to VT Change String Value message

Data length: 8 bytes
Parameter group number: ECU to VT, destination specific

Byte 1 VT function = 810

Bits 7 - 4 0000 Command Command
Bits 3 - 0 1000 Parameter VT Change String Value
Bytes 2, 3 Reserved, set to FF16
Bytes 4, 5 Object ID of the Input String or String Variable
Bytes 6–8 Reserved, set to FF16

H.20 VT On User-Layout Hide/Show message

This message applies to version 4 and later VTs. The VT On User-Layout Hide/Show message is sent by the
VT to notify Working Sets that Window Mask or Key Group objects have been displayed or removed from the
visible mask. This message shall also be used to notify a Working Set that has just been made inactive and
still visible that its active Data Mask and/or its active Soft Key Mask is still visible. The VT may communicate
the state of up to two Window Masks or Key Group objects or a Data Mask and Soft Key Mask with a single
packet. Several packets may be needed to convey the state of all affected Window Mask or Key Group, Data
Masks and Soft Key Masks objects. All Window Masks, Key Group, Data Mask or Soft Key Mask objects not
mentioned in this message shall be considered to remain in the last known visibility state.

If a VT is ready to make an inactive and visible Working Set active, it shall send first a VT On User-Layout
Hide/Show message to hide the visible Data and Soft Key Mask of the inactive Working Set before the
Working Set is made active as indicated by the VT Status message. In this way the VT communicates to the
WS that the Data and Soft Key Masks are visible. They are visible because the WS is active (indicated by the
VT Status message) and not because it is inactive and visible (indicated by the VT On User-Layout Hide/Show
message).

Transmission repetition rate: On change of any of Bytes 2 to 7 and up to 5 messages per second per mask

Data length: 8 bytes

Parameter group number: VT to ECU, Destination Specific

Byte 1 VT function = 910

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 1001 Parameter VT On User-Layout Hide/Show
Bytes 2, 3 Object ID of Window Mask, or Key Group, Data Mask or Soft
Key Mask object
Byte 4 Status:
Bit 0 = State (0 = hidden, 1 = shown)
Bytes 5, 6 Object ID of Window Mask, or Key Group, Data Mask or Soft
Key Mask object or NULL Object ID
Byte 7 Status:
1
Bit 0 = State (0 = hidden, 1 = shown)
Byte 8 Reserved, set to FF16
1
If the previous attribute is the NULL Object ID, this bit shall be set to 0.

H.21 VT On User-Layout Hide/Show response

This message applies to version 4 and later VTs. This message is an exception to other messages in this
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annex and is not optional. It shall always be sent in response to a VT On User-Layout Hide/Show message.

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 ISO 11783-6:2014(E)

Transmission repetition rate: In response to VT On User-Layout Hide/Show message

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 910

Bits 7 - 4 0000 Command Control Element Function
Bits 3 - 0 1001 Parameter VT On User-Layout Hide/Show
Bytes 2, 3 Object ID of Window Mask, or Key Group, Data Mask or Soft
Key Mask object
Byte 4 Status:
Bit 0 = State (0 = hidden, 1 = shown)
Bytes 5, 6 Object ID of Window Mask, or Key Group, Data Mask or Soft
Key Mask object or NULL Object ID
Byte 7 Status:
1
Bit 0 = State (0 = hidden, 1 = shown)
Byte 8 Reserved, set to FF16
1
If the previous attribute is the NULL Ojbect ID, this bit shall be set to 0.

H.22 VT Control Audio Signal Termination message

This command shall be sent by a version 4 and later VT when it terminates a Control Audio Signal command
before completion. This message shall not be sent when the VT terminates an acoustic signal from a lower
priority Alarm Mask. There is no response to this message.

Transmission repetition rate: On event

Data length: 8 bytes
Parameter group number: VT to ECU, destination specific

Byte 1 VT function = 1010

Bits 7 - 4 0000 Command Command
Bits 3 - 0 1010 Parameter Control Audio
Byte 2 Termination Cause
Bit 0 = 1 = Audio was terminated (bit shall always be set)
Bits 1-7 = reserved, set to 0
Byte 3-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

Annex I
(normative)

Other messages

The VT shall also support and generate other pertinent messages, as defined in ISO 11783-7. These shall
include, but not be limited to, Language command (PGN 65039), which contains parameters for Units of
Operation and Date and Time formats.

The VT and Working Sets may use Wheel-based speed and distance (PGN 65096) and Maintain power (PGN
65095) in order to monitor the Key switch state, Maximum time of tractor power and to manage shutdown.
(See Clause 4.6.7 System Shutdown)

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 ISO 11783-6:2014(E)

Annex J
(normative)

Auxiliary control

J.1 General
Auxiliary control allows the operator to control specific functions independent of the VT interface, as long as
the Auxiliary Inputs and Auxiliary Functions maintain the connection between them and with the VT. The VT
Version 2 Auxiliary Control protocol has been superseded in favor of the protocol and algorithms described in
this Annex. The Auxiliary Control protocol and algorithms in VT Version 3 and later are not compatible with the
Auxiliary Control protocol and algorithms in VT Version 2 Working Sets. Auxiliary Inputs (keys, switches, dials,
knobs, sliders), provided by one or more Working Sets (or the VT), are active at all times after being assigned
to an Auxiliary Function - independent of active visible Data Mask and visible Soft Key Mask of the VT. These
inputs are assigned to Auxiliary Functions (i.e. raise/lower, start/stop, set position) and are also provided by
one or more Working Sets (or the VT). The operator may assign the inputs to the functions using a proprietary
auxiliary assignment screen provided by the VT. Once an Auxiliary Input has been assigned to an Auxiliary
Function by the VT, the operator is then able to control the function independent of the active Working Set on
the VT.

VT Version 3 and later use a revised Auxiliary control method and set of messages. To maintain maximum
system compatibility while meeting the objectives of the revised method, both the version 2 and the version 3
Auxiliary control objects and messages are defined in this document. To facilitate easy identification, those
Auxiliary control items specific to VT version 2 have a “Type 1” designation, and those Auxiliary control items
specific to VT version 3 and later have a “Type 2” designation.

When a system of assignments has been made, the Working Sets providing the Type 2 Auxiliary Functions
will store their assignments as their new preferred assignments. Since the preferred assignments are provided
by the Working Sets providing the Auxiliary Functions, factory default assignments may facilitate easy
integration of known Auxiliary Inputs and Auxiliary Functions. A Working Set design may be implemented in a
manner to recognize more than one combination of auxiliary input units and store or provide unique sets of
preferred assignments based on the system of auxiliary inputs available. On later power cycles and as a result
of other specific events, a set of preferred assignments is communicated to the VT for validation across the
complete system.

EXAMPLE An operator prefers to raise and lower a particular implement (a Working Set) at any time, regardless of the
visible masks of the VT. The implement provides a “raise/lower implement” Auxiliary Function. There is an auxiliary input
available, a two position momentary toggle switch, located on the armrest of the tractor of a type that is compatible with
the Auxiliary Function. The operator, using a screen provided by the VT, assigns this switch to the “raise/lower implement”
function. The operator is then able to then raise and lower the implement using the switch on the armrest. From that
moment until power is removed, the function of the switch does not change unless changed by the operator.

J.2 Auxiliary Inputs

Auxiliary Inputs can either be located on external units, or located on the VT. The inputs do not have to be
physical, but shall always be available to the operator. There are various types of Auxiliary Inputs, Boolean
(i.e. a button or switch), analog (i.e. joystick, dials, knobs), encoder, and combinatorial, as listed in Table J.5
— Auxiliary Function Type 2 types.

Boolean inputs have two states: enabled and disabled (on/off, TRUE/FALSE etc). There are two types of
Boolean inputs, latched and non-latched. Non-latched or momentary Boolean inputs are on or TRUE only
when activated by an operator, i.e. when a button or key is pushed and held.

259
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 ISO 11783-6:2014(E)

Analog inputs are always reported in terms of percentage of maximum value, as follows:

(input − min value)

output = × 100
(max value − min value)

Encoder inputs are always reported by current encoder count.

When specifically enabled by the VT, an Auxiliary Input unit sends an Auxiliary Input status message once per
second per input that reports the status of an individual Auxiliary Input. The unit also sends a status message
immediately whenever the value of an Auxiliary Input changes, although at least 50 ms shall elapse between
status messages for a particular input (maximum transmit rate for a particular input is 20 Hz). When held, a
non-latched Boolean input sends its status every 200 ms. The message is broadcast to all Working Sets, and
is not acknowledged.

In some conditions, it is possible that a transition is not communicated to a Auxiliary Function Working Set
(either because the value of a particular input is changing faster than its input unit is able to transmit a status
message, or because a status message has been lost by the Working Set). In these conditions, the Auxiliary
Function Working Set is responsible for determining that one or more transitions have been missed using the
Number of Transitions parameter as is available for some of the auxiliary types.

J.3 Auxiliary controls in multiple VT environments

J.3.1 General rules

In order to accommodate Auxiliary Controls in a multiple VT environment, the following general rules apply.
These rules apply even when there is only one VT on the network to avoid VT boot-up time issues:

⎯ Auxiliary assignments shall only be performed at VT function instance zero (0) since this is the VT that
will have all of the Auxiliary Inputs and Auxiliary Function designators. If the operator tries to access
auxiliary assignment screen on a VT that is not function instance zero (0), the VT shall notify the operator
that it is not allowed to perform auxiliary assignments.

⎯ Auxiliary assignment validation shall be performed only at VT function instance zero (0).

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⎯ VTs with function instance other than zero (0) may receive object pools containing Auxiliary Input and/or
Auxiliary Function objects. These objects will be parsed, but not used in making or validating
assignments. This implies that an object pool could have to be split into two pools. For example, to have
a Working Set display and function on VT function instance one (1) the entire pool (all objects, including
the Auxiliary Inputs and Functions) could be uploaded to VT function instance one (1). In order to control
and make Auxiliary assignments, a pool containing the Auxiliary Inputs and Functions shall be uploaded
to VT function instance zero (0).

⎯ Working Sets using two VT’s on the network shall transmit their Working Set Maintenance message to
both VT’s at the regular interval. The usual connection management rules apply.

J.3.2 Primary VT and resolving VT function instance zero

The rules of Annex J imply that there shall always be a VT with function instance zero on the network. The
means to configure the primary VT and resolve the function instance zero VT is defined in Clause 4.6.25 VT
Number.

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 ISO 11783-6:2014(E)

J.4 Defining auxiliary inputs and functions

J.4.1 General

Auxiliary Inputs and Auxiliary Functions are defined in the object pools of the Working Sets that provide them.
Auxiliary Inputs are defined using Auxiliary Input objects, and Auxiliary Functions are defined using Auxiliary
Function objects. An Auxiliary Input or Auxiliary Function is uniquely identified to the operator by a
combination of its designator or label representing its type and the designator of its Working Set. In cases
where a unit is used exclusively to provide Auxiliary Inputs (e.g. a switch box), it would use a minimal object
pool, consisting of a Working Set object and one or more Auxiliary Input objects. Transport protocol is used to
transmit the object pool (See Annex C).

Auxiliary control object types 29 and 30 specified in “Table J.1 — Auxiliary Function Type 1 attributes and
record format“ and “Table J.3 — Auxiliary Input Type 1 attributes and record format“ are made obsolete by
version 3 or later of ISO 11783-6. For compatibility to prior versions of ISO 11783-6 compatible Working Sets,
object types 29 and 30 shall be parsed and validated but not utilised in Auxiliary Control Assignments by
version 3 or later VTs (See Clause D.3 Get Memory response). Version 3 and later Working Sets shall not use
object types 29 and 30.

J.4.2 Auxiliary Function Type 1 object

The Auxiliary Function Type 1 object defines the function attributes and designator of an Auxiliary Function.

The VT shall use the attributes of the Auxiliary Function Type 1 object to enforce the rules of assigning an
Auxiliary Input to an Auxiliary Function. For example, a Boolean Auxiliary Function shall only be assigned to a
compatible Boolean Auxiliary Input. Auxiliary Function Designators sent to a VT shall fit within a Soft Key
designator area (See Clause 4.5.3 Soft Key Mask area and Soft Key designatorsSoft Key Mask area and Soft
Key designators

). Any object defining the Auxiliary Function designator located outside the designator area is clipped.

Allowed commands:

⎯ Get Attribute Value message (VT version 4 and later).

Auxiliary Function Events:

⎯ None

Table J.1 — Auxiliary Function Type 1 attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value Byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =29 3 Object Type = Auxiliary Function Type 1
Background Integer 1 0-255 4 Background colour.
colour
Function type Integer 1 0,1 or 2 5 0 = Latching Boolean
1 = Analog
2 = Non-latching Boolean
Boolean function types include on/off or
TRUE/FALSE values while analog function types
have a range of values.

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 ISO 11783-6:2014(E)

Number of Integer 1 1-255 6 The objects that follow are used as the Auxiliary
objects to follow Function designator. Although the use of the
identifier is proprietary to the VT, the set of
objects shall fit inside a Soft Key designator. The
VT clips any object or part of an object located
outside the area of a Soft Key designator.
Repeat: Integer 2 0-65534 7+ Object ID of a picture graphic, output shape, or
{Object ID} object*6 output field used to define the designator of the
Auxiliary Function.
{X Location} Signed 2 -32768 9+ Relative X location of the top left-hand corner of
integer to object*6 the object in VT pixels (relative to the top left
+32767 corner of an Auxiliary Function designator).
{Y Location} Signed 2 -32768 11+ Relative Y location of the top left-hand corner of
integer to object*6 the object in VT pixels (relative to the top left
+32767 corner of an Auxiliary Function designator).
NOTE Object 29 shall be parsed and validated but not utilized by version 3 or later VTs in making Auxiliary Control
Assignments.

J.4.3 Auxiliary Function Type 2 object

Allowed commands:

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

Auxiliary Function Events:

⎯ None

Table J.2 — Auxiliary Function Type 2 attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value Byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =31 3 Object Type = Auxiliary Function Type 2
Background 1 Integer 1 0-255 4 Background colour.
colour
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 ISO 11783-6:2014(E)

Size Range or Record

Attribute Name AID Type Description
(bytes) Value Byte
Function [2] Integer 1 0-255 5 Attributes of Auxiliary Function to be assigned
attributes to an input control.
Bits 0-4 Auxiliary function type

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See Table J.5 — Auxiliary Function Type 2
types

Bit 5 Critical Control

0 = this function may be controlled by any
compatible Auxiliary Input.
1 = This function can only be controlled by a
critical Auxiliary Input (see ISO 15077)
Bit 6 Assignment Lock
0 = the operator or a Preferred Assignment
command can assign this function. Operator
assignments take precedence
1 = This function shall only be assigned with a
Preferred Assignment command from the
Working Set that owns this function
Bit 7 Single-assignment
0 = Function can be assigned with other
Auxiliary Functions to same input
1 = Function shall not be assigned with other
Auxiliary Functions to same input
Number of Integer 1 1-255 6 The objects that follow are used as the Auxiliary
objects to Function designator. The set of objects shall fit
Follow inside a Soft Key designator. The VT clips any
object or part of an object located outside the
area of a Soft Key designator.
REPEAT: Integer 2 0-65534 7+ Object ID of an object contained by this object.
{Object ID} object*6
{X Location} Integer 2 -32768 9+ Relative X location of the top left-hand corner of
to object*6 the object in VT pixels (relative to the top left
+32767 corner of an Auxiliary Function designator).

{Y Location} Integer 2 -32768 11+ Relative Y location of the top left-hand corner of
to object*6 the object in VT pixels (relative to the top left
+32767 corner of an Auxiliary Function designator).

J.4.4 Auxiliary Input Type 1 object

The Auxiliary Input Type 1 object defines the designator, the key, switch or dial number and the function type
for an Auxiliary Input.

Allowed commands:

⎯ Change Child Location command;

⎯ Get Attribute Value message (VT version 4 and later)..

Auxiliary function event:

⎯ none.

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Table J.3 — Auxiliary Input Type 1 attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value Byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =30 3 Object Type = Auxiliary Input Type 1
Background Integer 1 0-255 4 Background colour.
colour
Function type Integer 1 0,1,2 5 0 = Latching Boolean
1 = Analog
2 = Non-latching Boolean
Boolean function types include on/off or
TRUE/FALSE values while analog function
types have a range of values.
Input ID Integer 1 0-250 6 The identification number of the input. This
number is used by the Auxiliary Input units to
identify a particular input when sending an
Auxiliary Input status message.
Number of Integer 1 1-255 7 The objects that follow are used as the Auxiliary
objects to follow Input designator. Although the use of the
identifier is proprietary to the VT, the set of
objects shall fit inside a Soft Key designator.
The VT clips any object or part of an object
located outside the area of a Soft Key
designator.
Repeat: Integer 2 0-65534 8+ Object ID of a picture graphic, output shape or
{Object ID} object*6 output field used to define the designator of the
Auxiliary Input.
{X Location} Signed 2 -32768 10+ Relative X location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of an Auxiliary Input designator).
{Y Location} Signed 2 -32768 12+ Relative Y location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of an Auxiliary Input designator).
NOTE: Object 30 shall be parsed and validated but not utilized by version 3 or later VTs in making Auxiliary Control
Assignments.

J.4.5 Auxiliary Input Type 2 object

Allowed commands:

⎯ Change Background Colour command;

⎯ Change Child Location command;

⎯ Change Child Position command;

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⎯ Change Attribute command;

⎯ Get Attribute Value message (VT version 4 and later).

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 ISO 11783-6:2014(E)

Auxiliary function event:

⎯ none.

Table J.4 — Auxiliary Input Type 2 attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value Byte
Object ID Integer 2 0-65534 1-2 Object identifier. Shall be unique within the
object pool.
Type [0] Integer 1 =32 3 Object Type = Auxiliary Input Type 2
Background 1 Integer 1 0-255 4 Background colour.
colour
Function [2] Integer 1 0-255 5 Type of input function that the input control
attributes performs when assigned.
Bits 0-4 Auxiliary function type
See Table J.5 — Auxiliary Function Type 2
types

Bit 5 Critical Control

0 = this input shall not control critical auxiliary)
functions. This input is a non-critical VT
operator control in terms of ISO 15077.
1 = This input may control a critical (auxiliary)
function. This input is a critical VT operator
control in terms of ISO 15077.
Bit 6 Reserved, set to 0
Bit 7 Single-assignment
0 = Input may be assigned to multiple Auxiliary
Functions
1 = Input shall only be assigned to a single
Auxiliary Function
Number of Integer 1 1-255 6 The objects that follow are used as the Auxiliary
objects to follow Input designator. The set of objects shall fit
inside a Soft Key designator. The VT clips any
object or part of an object located outside the
area of a Soft Key designator.
Repeat: Integer 2 0-65534 7+ Object ID of an object contained by this object.
{Object ID} object*6
{X Location} Signed 2 -32768 9+ Relative X location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of an Auxiliary Input designator).
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{Y Location} Signed 2 -32768 11+ Relative Y location of the top left corner of the
integer to object*6 object in VT pixels (relative to the top left corner
+32767 of an Auxiliary Input designator).

J.4.6 Auxiliary Function Type 2 types

Each function and input object shall conform to a type specified in Table J.5 — Auxiliary Function Type 2
types. When a function is assigned to an input, their types shall match according to the requirements listed in
Table J.5 — Auxiliary Function Type 2 types. The values shown in the table are transmitted in the status
message. (See Clause J.7.9 Auxiliary Input Type 2 Status message). The VT shall ensure that the input type

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 ISO 11783-6:2014(E)

of the assigned Auxiliary Input exactly matches the function type of the Auxiliary Function, regardless of
whether the assignment was made by an operator or by a Working Set. The Auxiliary Inputs shall meet the
operator controls requirements specified in ISO 15077.

Table J.5 — Auxiliary Function Type 2 types

Function Description and Values for Auxiliary Input Status
Type Range
Type ID Message
Two-position switch (maintains position) (Single Pole, Double
Throw)
Boolean – Value 1: Value 1:
Latching 0, 1 0 = Off = backward, down, left, or not pressed
0 (maintains 1 = On = forward, up, right, or pressed
position) On/ Value 2:
Off 0 – FFFF16 Value 2:
Number of transitions from Off to On since power up.
Overflows from FFFF16 to 0.
Maintains position setting
Value 1: Value 1:
Analog
0 – 100% 0% = backward, down, left, counter-clockwise
(maintains
1 100%(FAFF16) = forward, up, right, clockwise
position
Value 2:
setting)
FFFF16 Value 2:
Reserved, set to FFFF16
Two-position switch (return to off) (Momentary Single Pole,
Double Throw)

Value 1:
Value 1:
Boolean – 0 = Off = backward, down, left, or not pressed
0, 1, 2
Non-Latching 1 = Momentary = forward, up, right, or pressed
2
(momentary) 2 = held
Value 2:
Increase value
0 – FFFF16
Value 2:
Number of transitions from Off to not Off since power up
(Momentary to held is not counted). Overflows from
FFFF16 to 0.
Two way analog (return to centre position)
Value 1:
Value 1:
Analog – 0 – 100%
0% = backward, down, left, counter-clockwise
3 return to 50%
100%(FAFF16) = forward, up, right, clockwise
Left/ Right Value 2:
Value 2:
FFFF16
Reserved, set to FFFF16
One way analog input (return to 0%)
Value 1:
Value 1:
Analog – 0 – 100%
0% = backward, down, left, counter-clockwise
4 return to 0%
100%(FAFF16) = forward, up, right, clockwise
Increase value Value 2:
Value 2:
FFFF16
Reserved, set to FFFF16
Three-Position Switch (latching in all positions) (Single Pole,
Three Position, Centre Off)
Dual Boolean - Value 1: Value 1:
Both Latching 0, 1, 4 0 = Off = centre
5 (Maintain 1 = On = forward, up or right
positions) On/ Value 2: 4 = On = backward, down or left
Off/ On 0 – FFFF16 Value 2:
Number of transitions from Off to On since power up.
Overflows from FFFF16 to 0.

266
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 ISO 11783-6:2014(E)

Function Description and Values for Auxiliary Input Status

Type Range
Type ID Message
Three-Position Switch, (returning to centre position)
(Momentary Single Pole, Three Position, Centre Off)
Dual Boolean – Value 1:
Both Non- 0 = Off
Value 1:
Latching 1 = Momentary = forward, up or right
0, 1, 2, 4, 8
(Momentary) 2 = held forward, up, or right
6
Increase/ Off/ 4 = Momentary = backward, down or left
Value 2:
Decrease; 8 = held backward, down, or left
0 – FFFF16
Raise/ Off/ Value 2:
Lower Number of transitions from Off to not Off since power up
(Momentary to held is not counted). Overflows from
FFFF16 to 0.
Three-Position Switch, latching in up position, momentary
down (Single Pole, Three Position, Centre Off)
Value 1:
Value 1:
Dual Boolean – 0 = Off (latching)
0, 1, 4, 8
Latching (Up) 1 = On = forward, up or right (latching)
7
(Momentary 4 = On = backward, down or left (non-latching)
Value 2:
down) 8 = held backward, down, or left (non-latching)
0 – FFFF16
Value 2:
Number of transitions from Off to not Off since power up
(On to held is not counted). Overflows from FFFF16 to 0.
Three-Position Switch, latching in down position, momentary
up (Single Pole, Three Position, Centre Off)
Value 1:
Dual Boolean – Value 1:
0 = Off (latching)
Latching 0, 1, 2, 4
1 = On = forward, up or right (non-latching)
8 (Down)
2 = held forward, up or right (non-latching)
(Momentary Value 2:
4 = On = backward, down or left (latching)
up) 0 – FFFF16
Value 2:
Number of transitions from Off to not Off since power up
(On to held is not counted). Overflows from FFFF16 to 0.
Two way analog (return to centre position) with latching
Boolean at 0% and 100% positions
Value 1:
Value 1:
Combined 0 – 100%,
0% = backward, down, left, counter-clockwise
Analog – return FB0016,
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100%(FAFF16) = forward, up, right, clockwise

9 to 50% with FB0116
FB0016 = Latched forward
Dual Boolean -
FB0116 = Latched backward
Latching Value 2:
Value 2:
0 – FFFF16
Number of transitions from non-Latched to Latched since
power up. Overflows from FFFF16 to 0.
Analog maintains position setting with latching Boolean at 0%
and 100% positions
Combined Value 1:
Value 1:
Analog – 0 – 100%,
0% = backward, down, left, counter-clockwise
maintains FB0016,
100%(FAFF16) = forward, up, right, clockwise
10 position setting FB0116
FB0016 = Latched forward
with Dual
FB0116 = Latched backward
Boolean - Value 2:
Value 2:
Latching 0 – FFFF16
Number of transitions from non-Latched to Latched since
power up. Overflows from FFFF16 to 0.

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 ISO 11783-6:2014(E)

Function Description and Values for Auxiliary Input Status

Type Range
Type ID Message
Two quadrature mounted Three-Position Switches, (returning
to centre position) (Momentary Single Pole, Three Position,
Centre Off) Bit values can be combined to indicate transitions
from one held position to another held position
(See Figure J.1 — Quadrature non-latching boolean value
representation)
Value 1:
Bits 1-0 Forward or up
Value 1: Bits 3-2 Backward or down
Quadrature
Bits 5-4 Right
11 Boolean - Non-
Value 2: Bits 7-6 Left
Latching
0 – FFFF16 Possible values for each bit pair:
00 = Off
01 = On (first activation)
10 = held
11 = reserved
Value 2:
Number of transitions of any axis from Off to On since
power up (On to held is not counted). Overflows from
FFFF16 to 0.
Two quadrature mounted analog maintain position setting.
The centre position of each analog axis is at 50% value
Value 1:
Quadrature Value 1:
Axis #1:
Analog 0 – 100%
0%= backward or down
12 (maintains
100%(FAFF16) = forward or up
position Value 2:
Value 2:
setting) 0 – 100%
Axis #2:
0% = left
100%(FAFF16) = right
Two quadrature mounted analog returns to centre position
(The centre position of each analog axis is at 50%)
Value 1:
Value 1:
Axis #1:
Quadrature 0 – 100%
0%= backward or down
13 Analog return
100%(FAFF16) = forward or up
to 50% Value 2:
Value 2:
0 – 100%
Axis #2:
0% = left
100%(FAFF16) = right
Count increases when turning in the encoders “increase”
Value 1: direction and count decreases when turning in the opposite
0 – FFFF16 direction
Bidirectional
14 Value 1: Current Count
Encoder
Value 2: 0 to FFFF16 with rollover to 0
1 – FFFF16 Value 2: Calibration – Encoder Counts per revolution
1 to FFFF16 (fixed value)
15-30 Reserved Reserved for future use
31 Reserved Used for Remove assignment command

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NOTE Numbers in parenthesis indicate the held-state while the numbers not in parenthesis represent the reported
values for the transition from one state of the switches to the next state.

EXAMPLE Moving the input control from the centre position to the right position is reported as a value of 16.
Holding the control in the right position is reported as a value of 32. Then moving the control from the right position to the
lower right position is reported as a value of 36. Holding the control in the lower right position is reported as a value of 40.

Figure J.1 — Quadrature non-latching boolean value representation

J.4.7 Auxiliary Control Designator Type 2 Object Pointer

J.4.7.1 Behaviour

Auxiliary Control Designator Type 2 Object Pointers allow the Working Set to place Auxiliary Input Type 2 and
Auxiliary Function Type 2 designators in the Data Mask at Working Set defined coordinates. An Auxiliary
Control Designator Type 2 Object Pointer can point to the NULL Object ID and in this case nothing shall be
drawn unless the pointer type is 2.

This pointer allows an object pool to visually display the currently assigned relationship between its Auxiliary
Inputs and the Auxiliary Functions they control, as well as any Auxiliary Functions and the Auxiliary Input that
controls it. This object has an implied size that is equal to the VT Soft Key designator. (See Clause 4.5.3 Soft
Key Mask area and Soft Key designators) This is a special pointer that allows the VT to combine objects from
different Working Sets into one presentation.

The object behaves similar to an Input List object (See Clause 4.6.17 Operator input) with the following
exceptions:

⎯ The operator or Working Set is not able to select a value

⎯ The Change Numeric Value command is never sent

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 ISO 11783-6:2014(E)

⎯ The object cannot be disabled or enabled

The VT shall provide a means to expand this object in order to present associated set(s) of Working Set
designator and the auxiliary object designator. The expanded view is VT proprietary. (See Figure J.3 —
Example showing expansion of a single assignment designator and Figure J.4 — Example showing expansion
of a multiple assignment designator)

J.4.7.2 Pointer type 0, 2

If the Auxiliary Control designator Object Pointer is of pointer type 0 or 2, then the pointer points to an auxiliary
object or the Working Set object defined within this object pool, and the VT shall display that auxiliary object
designator (pointer type 0) or Working Set designator (pointer type 2).

J.4.7.3 Other Pointer type references

J.4.7.3.1 Pointer type 1, 3

If the Auxiliary Control designator Object Pointer is of pointer type 1 or 3, then this pointer references Auxiliary
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Object(s) that have an assignment relationship to the object referenced by the auxiliary object attribute within
this object pool. The VT shall display the assigned auxiliary object designator (pointer type 1) or its Working
Set designator (pointer type 3).

J.4.7.3.2 VT function instance > 0

Any VT with function instance greater than zero shall not cause auxiliary assignments and cannot have
access to the defined assignments. In this case, when the Object Pointer is of pointer type 1 or 3, the VT shall
use a proprietary means to indicate that there could be assignments associated with this auxiliary object, and
that this VT cannot display the assignments. As the presentation of the designator would be on the Data Mask
of the Working Set, the Working Set may choose to hide this object in order to avoid displaying the proprietary
indicator. (See Figure J.2 — Examples of Auxiliary Function references on Auxiliary Input unit Data Mask)

J.4.7.3.3 No assigned object

When there is no assigned object the VT shall indicate no assignment using a VT proprietary method.

J.4.7.3.4 Single assigned object

Where the Object Pointer is of pointer type 1 or 3, the VT shall display the designator of the referenced object.

J.4.7.3.5 Multiple assigned objects

When the Object Pointer is of pointer type 1 or pointer type 3, and there are multiple Auxiliary Function
assignments to an Auxiliary Input, then the VT shall use a proprietary means, while in the non-expanded view,
to indicate that a plurality of functions is assigned (See Figure J.2 — Examples of Auxiliary Function
references on Auxiliary Input unit Data Mask). Upon selection of this control these assignments shall be
displayed in an expanded view. (See Figure J.2 — Examples of Auxiliary Function references on Auxiliary
Input unit Data Mask and Figure J.4 — Example showing expansion of a multiple assignment designator)

If the pointer type is 1 with multiple assignments, the VT shall display, in the expanded view, both the
assigned Working Set designators and the assigned Auxiliary Function Type 2 designators via its proprietary
method (see Figure J.4 — Example showing expansion of a multiple assignment designator). If the pointer is
type 3 with multiple assignments, the VT shall display only the assigned Working Set designator via its
proprietary method, even if the same designator appears several times.

Allowed commands:

⎯ Change Attribute command;

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 ISO 11783-6:2014(E)

⎯ Get Attribute Value message (VT version 4 and later).

Auxiliary function event:

⎯ none.

Table J.6 — Auxiliary Control Designator Type 2 Object Pointer attributes and record format

Size Range or Record

Attribute Name AID Type Description
(bytes) Value byte
Object Identifier. Shall be unique within the
Object ID Integer 2 0-65534 1-2
object pool
Object Type = Auxiliary Control Designator
Type [0] Integer 1 =33 3
Type 2 Object Pointer
0 = Points to Auxiliary Object referenced by the
ID in bytes 5 - 6
1 = Points to Auxiliary Function (or Auxiliary
Input) Object that is assigned to the Auxiliary
Object referenced by the ID in bytes 5 - 6
2 = Points to the Working Set object for the
Pointer Type [1] Integer 1 0, 1, 2, 3 4
owner of this pointer object. ID (bytes 5 - 6)
shall be FFFF16 (NULL Object ID).
3 = Points to the Working Set object for the
Working Set that owns the Auxiliary Function or
Auxiliary Input that is assigned to the auxiliary
object referenced by the ID in bytes 5 - 6.
Auxiliary Object 0-65534, Object ID of a referenced Auxiliary Function or
2 Integer 2 5-6
ID 65535 Auxiliary Input object or NULL.

Table J.7 — Auxiliary Control Designator Type 2 Object Pointer examples shows examples for usage of
pointer types 0-3, and what information the VT shall display in place of the Auxiliary Control Designator Type 2
Object Pointer when the pointer is not extended. For these examples, a valid assignment of Auxiliary Input AI1
to Auxiliary Function AF1 is assumed.

Table J.7 — Auxiliary Control Designator Type 2 Object Pointer examples

Object Pool Auxiliary Object
Pointer VT display in place of designator Object Pointer in
Owner referenced by bytes 5
Type non-expanded view
-6
AF1 Auxiliary Function AF1 Auxiliary function designator of AF1
0
AI1 Auxiliary Input AI1 Auxiliary Input designator of AI1
AF1 Auxiliary Function AF1 Auxiliary Input designator of AI1 (assigned to AF1)
1
AI1 Auxiliary Input AI1 Auxiliary function designator of AF1 (assigned to AI1)
AF1 FFFF16 Working Set designator of AF1
2
AI1 FFFF16 Working Set designator of AI1
AF1 Auxiliary Function AF1 Working Set designator of AI1 (assigned to AF1)
3
AI1 Auxiliary Input AI1 Working Set designator of AF1 (assigned to AI1)
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 ISO 11783-6:2014(E)

Key
1 indicating single assignment 5 Auxiliary Input 1
2 VT Proprietary indicating multiple assignments 6 Auxiliary Input 2
3 VT Proprietary indicating no assignments 7 Auxiliary Input 3
4 VT Proprietary indicating assignments unknown 8 Auxiliary Input 4
(for VT with Function Instance > 0) 9 Auxiliary Input 5

Figure J.2 — Examples of Auxiliary Function references on Auxiliary Input unit Data Mask

Key
1 indicating single assignment 5 Auxiliary Input 1
2 VT Proprietary indicating multiple assignments 6 Auxiliary Input 2
3 VT Proprietary indicating no assignments 7 Auxiliary Input 3
4 VT Proprietary indicating assignments unknown 8 Auxiliary Input 4
(for VT with Function Instance > 0) 9 Auxiliary Input 5
10 VT Proprietary for single assignment

Figure J.3 — Example showing expansion of a single assignment designator

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 ISO 11783-6:2014(E)

Key
1 indicating single assignment 5 Auxiliary Input 1
2 VT Proprietary indicating multiple assignments 6 Auxiliary Input 2
3 VT Proprietary indicating no assignments 7 Auxiliary Input 3
4 VT Proprietary indicating assignments unknown 8 Auxiliary Input 4
(for VT with Function Instance > 0) 9 Auxiliary Input 5
10 VT Proprietary list of assignments for Auxiliary Input 2

Figure J.4 — Example showing expansion of a multiple assignment designator

Key
1 Auxiliary Function pickup up/down
2 Auxiliary Function back door open/close
3 Auxiliary Control Designators Type 2 Object Pointer where Pointer Type = 2

Figure J.5 — Example showing expansion of Auxiliary Inputs on an Auxiliary Function Data Mask
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 ISO 11783-6:2014(E)

J.5 Automatic Auxiliary Control assignment

If the object pool contains any Auxiliary Controls objects then following power on and after receiving either an
initial end of object pool response or a load version response, and after receiving an Auxiliary Input Type 2
Maintenance message where the status indicates ready, the Working Set Master shall send the Preferred
Assignment command to the VT with function instance zero only. The VT shall not allow manual assignments
to an Auxiliary Function until receiving a valid Preferred Assignment command from the Working Set which
provides the function. This causes the assignment process as described below. (See Figure J.6 — Typical
message sequence to make assignment and later remove assignment)

The assignment process is additionally repeated following -

⎯ Any additional end of object pool message that changes an Auxiliary Input or Auxiliary Function object
involved in an assignment in a way which would invalidate the assignment, or

⎯ A valid Preferred Assignment command message is received that changes the assignment of Auxiliary
Input or Auxiliary Function objects, or

⎯ On the removal of any object pool that changes the assignment of Auxiliary Input or Auxiliary Function
objects (by intentional deletion or communication loss)

The VT shall validate each Preferred Assignment command. If there exists any error, the entire Preferred
Assignment command shall be ignored and a Preferred Assignment response shall be sent with an
appropriate error code. The assignment process shall not be performed in that case. Examples of errors could
be invalid parameters (incorrect NAME of the Auxiliary Input unit, incorrect object id’s, …).

The VT with function instance zero performs the following steps:

1) The VT determines which Working Sets provide Auxiliary Inputs. (A Working Set provides an
Auxiliary Input if one or more Auxiliary Input objects are defined in its object pool.)

2) The VT determines the function type (See Table J.5 — Auxiliary Function Type 2 types) and
designator for each Auxiliary Input (as defined in its Auxiliary Input object), and the designator of its
Working Set (as defined in the Working Set object). If the VT provides Auxiliary Inputs, it shall define
a designator for itself and for each of its inputs (proprietary to the VT).

3) The VT determines which Working Sets provide Auxiliary Functions. (A Working Set provides an
Auxiliary Function if one or more Auxiliary Function objects are defined in its object pool.)

4) The VT determines the function type (See Table J.5 — Auxiliary Function Type 2 types) and
designator for each Auxiliary Function (as defined in its Auxiliary Function Type 2 object), and the
designator of the Auxiliary Function Working Set (as defined in the Working Set object). If the VT
provides Auxiliary Functions, it shall define a designator for itself and for each of its functions
(proprietary to the VT).

5) If the assignment process is triggered by a Preferred Assignment command message being

received, the VT shall perform the following steps:

i) For each Auxiliary Function with an assignment specified within the Preferred Assignment
command, the VT shall interpret this to be an assignment command for this Auxiliary Function.

ii) For each Auxiliary Function without an assignment specified within the Preferred Assignment
command, the VT shall interpret this to be a remove assignment command for this Auxiliary
Function (see J.7.7 Preferred Assignment).

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 ISO 11783-6:2014(E)

6) The VT shall verify the preferred assignments and already existing assignments of Auxiliary
Functions and Auxiliary Inputs to detect whether there are any conflicts with these assignments. The
VT may inform the Operator about the proposed assignments and may require confirmation (See
ISO 15077). A conflict shall be detected in the following situations:

i) The ‘Auxiliary Function Type’ values in an assignment do not match.

ii) The ‘Single Assignment’ bit for a function is set to 1 (single assignment) but the associated
Auxiliary Input is or would be mapped to more than one function if the current assignment is
allowed to complete (See Table J.2 — Auxiliary Function Type 2 attributes and record format).

iii) The ‘Single Assignment’ bit for an input is set to 1 (single assignment) but the Auxiliary Input is
or would be mapped to more than one function if the current assignment is allowed to complete
(See Table J.4 — Auxiliary Input Type 2 attributes and record format).

iv) The ‘Assignment Lock’ bit for a function is set to 1, but the associated Auxiliary Input is not the
preferred assignment (See Table J.2 — Auxiliary Function Type 2 attributes and record format).

v) The ‘Critical Control’ bit for an input is set to 0, but the associated Auxiliary Functions ‘Critical
Control’ bit is set to 1 (See Table J.2 — Auxiliary Function Type 2 attributes and record format
and Table J.4 — Auxiliary Input Type 2 attributes and record format).

vi) An attempt is made to assign an Auxiliary Function to more than one Auxiliary Input.

vii) An object pool containing an assigned Auxiliary Input or Function has been removed (by
intentional deletion or communication loss).

7) For each assignment with conflicts, the VT shall

i) Send an Auxiliary Assignment Type 2 command with “remove assignment” (set to NULL) to the
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Auxiliary Function Working Set Master.

ii) Alert the operator that the assignment has been removed and that the operator has to re-assign
the function in the VT’s proprietary Auxiliary Control assignment screen

8) For each non-conflicting assignment, the VT shall

i) Send an Auxiliary Input Status Type 2 Enable command to the Auxiliary Input Working Set
Master to enable the specific Auxiliary Input status message, unless this input status message
has already been enabled.

ii) Send an Auxiliary Assignment Type 2 command to the Auxiliary Function Working Set Master,
unless it has already been assigned.

9) For each Auxiliary Function with no assignments, the VT shall send an Auxiliary Assignment Type 2
command with “remove assignment” (set to NULL) to the Auxiliary Function Working Set Master.

10) For each Auxiliary Input with no assignments, the VT shall send an Auxiliary Input Status Type 2
Enable command to the Auxiliary Input Working Set Master to disable the specific Auxiliary Input
status message, unless this input status message has already been disabled.

The Auxiliary Function Working Set Master shall monitor the assignment status of its Auxiliary Functions.
When the Working Set comes into the “Working State”, but not all Auxiliary Functions which are needed for
proper operation have been assigned to Auxiliary Inputs, the Working Set shall take appropriate action (e.g.
Auxiliary Function Working Set Master may alert the operator that he will have to assign the respective
functions in the VT’s proprietary Auxiliary Control assignment screen).

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 ISO 11783-6:2014(E)

J.6 Manual Auxiliary Control assignment

At any time after initialization, the operator can setup or change the Auxiliary Control assignments. The
procedure is proprietary and only applies to the VT with function instance zero. This procedure is functionally
equivalent to Clause J.5 Automatic Auxiliary Control assignment, differing by the means of operator
interaction. (See Figure J.6 — Typical message sequence to make assignment and later remove assignment)
The following rules apply.

a) The VT shall not allow manual assignments to an Auxiliary Function until receiving a valid Preferred
Assignment command from the Working Set which provides the function.

b) An Auxiliary Input can be assigned to one or more Auxiliary Functions (one-to-many relationship), except
in the case of Auxiliary Function objects or Auxiliary Input objects that have the ‘Single Assignment’ bit
set. In this case, a one-to-one relationship is enforced.

c) An Auxiliary Function cannot be assigned to more than one Auxiliary Input.

d) Auxiliary functions can be assigned to any compatible input, except where the Auxiliary Function
"Assignment Lock' bit is set. (See Table J.2 — Auxiliary Function Type 2 attributes and record format)

e) Auxiliary functions can be assigned to any compatible input, except where the Auxiliary Function "Critical
Control” bit is set. (See Table J.2 — Auxiliary Function Type 2 attributes and record format)

f) Auxiliary Inputs shall be assigned only to Auxiliary Functions of the same type. (See Table J.5 — Auxiliary
Function Type 2 types)

g) When the operator has chosen to have an Auxiliary Input assigned to an Auxiliary Function:

i) Send an Auxiliary Input Status Type 2 Enable command to the Auxiliary Input to enable the
specific Auxiliary Input status message. Each Message shall be acknowledged by the Working
Set of the Auxiliary Input.

ii) For each Auxiliary Function assigned (non-conflicting) to this specific Auxiliary Input, the VT shall
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transmit an Auxiliary Assignment Type 2 command to the Auxiliary Function Working Set
Master, unless it has already been assigned. Each message shall be acknowledged by the
Working Set of the Auxiliary Function.

h) The Auxiliary Function Working Set Master shall store the assignment as the new preferred assignment.
Additionally, it may allocate additional storage to preferred assignments as a means to adapt to various
configurations of Auxiliary Input controls.

i) It is the Working Set responsibility to determine when to commit the current assignments as the
preferred assignments (e.g. upon receipt of assignment command, key off, power fail,
proprietary screen button, or other means).

ii) The Working Set may store its preferred assignment on an available file server as a means to
transfer identical preferred assignments from one Working Set to another "Functionally Identical
WS". Application of this method can improve the consistency of operation from one system to
another.

iii) The Working Set may adapt the Preferred Assignment command to an alternate Auxiliary Input
unit that is a “Functionally Identical WS” to a previously assigned Auxiliary Input unit where the
Model Identification Code is also identical. (See Clause J.7.7 Preferred Assignment command)

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i) A particular assignment can be cancelled using one of three methods. A different input can be assigned to
the function (overwriting the assignment), a “NULL” can be assigned to the function (leaving the function
not assigned), or the Working Set can be powered down. In the first two cases:

i) The VT shall send an Auxiliary Assignment Type 2 command to the Auxiliary Function Working
Set to cause the assignment change (overwrite with new Auxiliary Input) or removal (set to
NULL).
Each message shall be acknowledged by the Working Set of the Auxiliary Function.

ii) If there are no other Auxiliary Functions assigned to the same Auxiliary Input, the VT shall send
the Auxiliary Input Status Type 2 Enable command to the Working Set Master of the Auxiliary
Input. The command will disable the specific auxiliary status message. Each message shall be
acknowledged by the Working Set of the Auxiliary Input.

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 ISO 11783-6:2014(E)

Key
1 Indicates that the status message is terminated

Figure J.6 — Typical message sequence to make assignment and later remove assignment

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 ISO 11783-6:2014(E)

J.7 Auxiliary control messages

J.7.1 General

Messages used with Auxiliary Control (See Figure J.7 — Auxiliary control message flow) are:

⎯ An Auxiliary Assignment Type 1 command (and response)

⎯ an Auxiliary Input Type 1 status (no response)

⎯ an Auxiliary Assignment Type 2 command (and response)

⎯ a Preferred Assignment command (and response)

⎯ an Auxiliary Input Status Type 2 Enable command (and response)

⎯ an Auxiliary Input Type 2 Status message (no response)

⎯ an Auxiliary Input Type 2 Maintenance message (no response)

J.7.2 Auxiliary Assignment Type 1 command

This command is reserved to maintain visibility to VT version 2 Auxiliary Assignment messages and is not
transmitted by a version 3 or later VT.

Transmission repetition rate: On input assignment

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 3210

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0000 Parameter Auxiliary Assignment
Byte 2 SA of the Auxiliary Input device
Byte 3 Auxiliary Input number (0-250) or FF16 for “NULL”(unassigned)
Bytes 4,5 Object ID of Auxiliary Function
Bytes 6-8 Reserved, set to FF16
J.7.3 Auxiliary Assignment Type 1 response

This response is reserved to maintain visibility to VT version 2 Auxiliary Assignment messages and is not
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utilized by a version 3 or later VT. It shall not be sent by version 3 or later Working Sets.

Transmission repetition rate: In response to an Auxiliary Assignment Type 1 command

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 3210

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0000 Parameter Auxiliary Assignment
Response
Byte 2 SA of the Auxiliary Input device
Byte 3 Auxiliary Input number
Bytes 4,5 Object ID of Auxiliary Function
Bytes 6-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

J.7.4 Auxiliary Input Type 1 status

This response is reserved to maintain visibility to VT version 2 Auxiliary Assignment messages and is not
utilized by a version 3 or later VT. It shall not be sent by version 3 or later Working Sets.

Transmission repetition rate: Once per second and on change to a maximum of five messages
per second.
Data length: 8 bytes
Parameter group number: ECU broadcast (VT transmit PGN is used with address set to the
global address)

Byte 1 VT function = 3310

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0001 Parameter Auxiliary Input Status
Byte 2 Input Number (0-250)
Bytes 3,4 Analyze value or FFFF16 if input type is boolean
Bytes 5,6 Number of transitions of disabled to enabled (0 if input type is
analog). This is a running count of transitions since power up.
Byte 7 FF16 if input type is analog
0 = Disabled, 1 = Enabled, 2 = non-latched Boolean held
Byte 8 Reserved, set to FF16
J.7.5 Auxiliary Assignment Type 2 command

The VT uses the Auxiliary Assignment Type 2 command to assign or to remove assignment of an Auxiliary
Input to an Auxiliary Function. Once the VT has transmitted an Auxiliary Assignment Type 2 command, it shall
wait for an acknowledgement from that ECU before it assigns another Auxiliary Input to that ECU. If an
acknowledgement is not received after 2 seconds, the VT shall send the command again. After three
unsuccessful attempts, the VT shall alert the operator that the Auxiliary Function is not available.

The operator assigns the inputs to the functions using a proprietary auxiliary assignment screen provided by
the VT. This assignment screen shall enforce the rule that the type of Auxiliary Input can be assigned only to
the same type of Auxiliary Function. Figure J.8 — Auxiliary assignment screen – example illustrates a possible
implementation of an auxiliary assignment screen. Once an Auxiliary Input has been assigned to an Auxiliary
Function, the operator is then able to control the function independent of the operations of the VT.

When the operator has chosen to have an Auxiliary Input Type 2 object assigned to an Auxiliary Function
Type 2 object the store as preferred assignment bit shall be set to 0. Now this assignment shall be stored as
the preferred assignment. In all the other situations it shall be set to 1.

Transmission repetition rate: On input assignment

Data length: 14 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 3610

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0100 Parameter Auxiliary Assignment
Byte 2-9 64-bit NAME of the Auxiliary Input Unit or
FFFFFFFFFFFFFFFF16 (to remove assignment)
Byte 10 Flags
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Bit 7 Preferred Assignment:

0 = store as preferred assignment
1 = do not store as preferred assignment
Bit 7 shall be set to 1 in any error condition (unexpected
shutdown/communication error of Auxiliary Input, etc.)
Bits 6-5 Reserved, set to 0
Bits 4-0 Auxiliary function type of assigned Auxiliary Input or
1F16 (to remove assignment)

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Byte 11, 12 Object ID of the Auxiliary Input or

FFFF16 (to remove assignment)
Byte 13, 14 Object ID of Auxiliary Function or
FFFF16 (to remove all assigned functions)

NOTE This figure depicts the logical communication, where a physical implementation may combine Auxiliary Inputs
and functions with the VT.

Figure J.7 — Auxiliary control message flow

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 ISO 11783-6:2014(E)

NOTE Icons may also be used in the designators. Operator interface is proprietary to the VT design.

Figure J.8 — Auxiliary assignment screen – example

Permitted remove assignment alternatives are listed below. These alternatives are shown in Figure J.9 —
Permitted remove assignment alternatives.

a) Remove assignment of auxiliary Function that was assigned to a specific Working Set specific Auxiliary
Input (See Figure J.9 — Permitted remove assignment alternatives - 9)

Destination Address = Address of the Auxiliary Function Working Set Master

NAME = FFFFFFFFFFFFFFFF16
Auxiliary function type of assigned Auxiliary Input = 1F16
Object ID of Auxiliary Input = FFFF16
Object ID of Auxiliary function = 216

b) Remove assignment of all Auxiliary Inputs from a Working Set (See Figure J.9 — Permitted remove
assignment alternatives - 10)

Destination Address = Address of the Auxiliary Function Working Set Master

NAME = FFFFFFFFFFFFFFFF16
Auxiliary function Type of assigned Auxiliary Input = 1F16
Object ID of Auxiliary Input = FFFF16
Object ID of Auxiliary Function = FFFF16

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 ISO 11783-6:2014(E)

Key
1 Auxiliary Input 1 6
Assignment
2 Auxiliary Input 2 7
Auxiliary Input 1 Object ID 1
3 Auxiliary Function 2 8
Auxiliary Input 2 Object ID 1
4 Auxiliary Function 2 Object ID 1 9
Permitted remove assignment of a single Auxiliary
5 Auxiliary Function 2 Object ID 2 Input
10 Permitted remove assignment of a Working Sets
Auxiliary Inputs
NOTE This figure depicts the logical communication, where a physical implementation may combine Auxiliary Inputs
and functions with the VT on the VT’s proprietary auxiliary assignment screen.

Figure J.9 — Permitted remove assignment alternatives

J.7.6 Auxiliary Assignment Type 2 response

The ECU shall send the auxiliary assignment response to acknowledge an Auxiliary Assignment Type 2
command. It shall send an acknowledgement within 1 second after receiving a command. If the Working Set
rejects the assignment, the VT shall alert the operator and may disable the Auxiliary Input status message if
this Auxiliary Input is not assigned to other Auxiliary Functions (See Clause J.5.g.ii)
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Transmission repetition rate: In response to an Auxiliary Assignment Type 2 command

Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 3610

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0100 Parameter Auxiliary assignment
Bytes 2, 3 Object ID of Auxiliary Function
Byte 4 Error Codes (0 = no errors)
Bit 0 = 1 = error, assignment not accepted
Bit 1 = 1 = error, this function is already assigned
Bytes 5-8 Reserved, Set to FF16

J.7.7 Preferred Assignment command

The preferred assignment command specifies a pre-defined assignment of an Auxiliary Input to an Auxiliary
Function. The Preferred Assignment command message shall not contain references to Auxiliary Input units

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 ISO 11783-6:2014(E)

that are not on the network. This command shall only be sent by Working Sets that provide Auxiliary
Functions.

A Model Identification Code, as defined by the manufacturer, is a proprietary code that defines a unique model
and version of an Auxiliary Input unit. When a newer and incompatible version of an input unit is created, it
shall be assigned a unique model identification code by the manufacturer.

The Auxiliary Function Working Set shall determine its preferred Auxiliary Input units. Factors that may be
considered are: Model Identification Code and 64-bit NAME (including Function Instance and Manufacturer
Code, excluding Identity Number). This allows an Auxiliary Function to accept another Auxiliary Input unit
which is "Functionally Identical" (example: a planter is connected to a different tractor which has a joystick that
has the same function instance, manufacturer code and model identification code as the original assignment).

NOTE: The Preferred Assignment command indicates the complete set of Auxiliary Function assignments for that Working
Set. Auxiliary functions that are not specifically included in the Preferred Assignment command are, or shall be,
unassigned.

After loading the object pool into the VT, the Preferred Assignment command shall be sent once as a result of
one of these conditions, since no manual assignments can be created until the VT receives the Preferred
Assignment message:

⎯ If the Auxiliary Function Working Set has no preferred assignment

⎯ If the Auxiliary Function Working Set detects a preferred Auxiliary Input unit on the network. The Auxiliary
Function unit shall delay until it receives the Auxiliary Input Type 2 Maintenance message with Status
equal to Ready. Not doing so may result in an Input Object ID(s) not valid error code in the Preferred
Assignment response. The Auxiliary Function Working Set may delay further to allow detection of other
preferred Auxiliary Input units.

⎯ If no preferred Auxiliary Input unit is detected. The Auxiliary Function unit may delay to allow detection of
Auxiliary Input units.

After the initial Preferred Assignment command is sent, only the following trigger conditions may cause the
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Preferred Assignment command to be sent again:

⎯ If the Auxiliary Function Working Set detects a preferred Auxiliary Input unit on the network that was not
previously detected or has reinitialized. The Auxiliary Function Working Set shall delay until it receives the
Auxiliary Input Type 2 Maintenance message with Status equal to Ready. Not waiting for the Ready status
may result in an Input Object ID(s) not valid error code in the Preferred Assignment response.

⎯ When an Auxiliary Input unit for which active assignments exist is removed from the network and/or
reconfiguration with existing (or alternate) Auxiliary Input units is desired.

⎯ Optionally, as a result of operator selection of a different set of preferred assignments via the operator
interface of the Working Set providing the Auxiliary Functions.

⎯ If the Auxiliary Function Working Set has modified its object pool in a manner that can affect the
assignments.

The Preferred Assignment command shall only be sent once per trigger condition.

Upon receipt of the Preferred Assignment command, the VT shall act in accordance with J.5 Automatic
Auxiliary Control assignment.

It is the Working Set responsibility to ensure that each Auxiliary Function Type 2 object ID occurs only once
within this message.

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 ISO 11783-6:2014(E)

Transmission repetition rate: On request

Data length: Variable
Parameter group number: ECU to VT, Destination Specific

Byte 1 VT function = 3410

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0010 Parameter Preferred Assignment
Byte 2 Number of Input Units
{Repeat}
{
Bytes 3-10 [8 bytes] 64-bit NAME of the Auxiliary Input Unit
Bytes 11-12 [2 bytes] Model Identification Code of the Auxiliary Input Unit
Byte 13 [1 byte] Number of Preferred Functions for this Auxiliary Input Unit
{Repeat}
{
Bytes 14-15 [2 bytes] Object ID of Auxiliary Function

--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
Bytes 16-17 [2 bytes] Object ID of Auxiliary Input
}
}

Example of a Preferred Assignment command (See Figure J.10 — Preferred assignment example)

a) Command [3410]

b) Number of inputs units [2]

1) NAME of Auxiliary Input unit [Auxiliary Input #1]

2) Model identification code [23]

3) Number of preferred functions for this Auxiliary Input [2]

I) Object ID of Auxiliary Function [1]

II) Object ID of Auxiliary Input [1]

III) Object ID of Auxiliary Function [2]

IV) Object ID of Auxiliary Input [7]

4) NAME of Auxiliary Input unit [Auxiliary Input #2]

5) Model identification code [87]

6) Number of preferred functions for this Auxiliary Input [1]

I) Object ID of Auxiliary Function [3]

II) Object ID of Auxiliary Input [1]

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 ISO 11783-6:2014(E)

Key
1 Auxiliary Input 1 6 Auxiliary Input 2 Object ID 1
2 Auxiliary Input 2 7 Auxiliary Function 2 Object ID 1
3 Auxiliary Function 2 8 Auxiliary Function 2 Object ID 2
4 Auxiliary Input 1 Object ID 1 9 Auxiliary Function 2 Object ID 3
5 Auxiliary Input 1 Object ID 7

Figure J.10 — Preferred assignment example

J.7.8 Preferred Assignment response

The VT shall send this message to acknowledge a Preferred Assignment command.

Transmission repetition rate: Response to the Preferred Assignment command

Data length: 8 bytes
Parameter group number: VT to ECU, Destination Specific

Byte 1 VT function = 3410

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0010 Parameter Preferred Assignment
response
Byte 2 Error Codes (0 = no error)
Bit 0 = 1 = Auxiliary Input Unit(s) not valid
Bit 1 = 1 = Function Object ID(s) not valid
Bit 2 = 1 = Input Object ID(s) not valid
Bit 3 = 1 = Duplicate Object ID of Auxiliary Function
Bit 4 = 1 = Any other error
Bytes 3, 4 Auxiliary Function Object ID of faulty assignment, set to NULL
Object ID if there are no errors
Bytes 5-8 Reserved, Set to FF16

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 ISO 11783-6:2014(E)

J.7.9 Auxiliary Input Type 2 Status message

On initialization and until enabled by the VT, Auxiliary Input units shall not automatically send an Auxiliary
Input status message.

When enabled or in learn mode, the input unit sends a message once per second and immediately whenever
the value of an Auxiliary Input control changes. At least 50 ms shall pass between status messages for a
particular input (maximum transmit rate for a particular input is 20 Hz). The Working Set designer should be
aware that multiple inputs in transition, each transmitting at 20 Hz, may contribute to an already heavily loaded
CAN bus, and should limit the frequency where possible. For example, noise on an analogue input may cause
its value to flutter for a long period of time even though its average value is not changing. When held, a non-
latched Boolean Auxiliary Input control sends its status every 200 ms. If a non-latched Boolean Auxiliary Input
control is held and the interval between messages exceeds 300ms, then the Auxiliary Function Working Set
shall process as if the non-latched Boolean Auxiliary Input control was released.

If an Auxiliary Input is determined to be in an invalid state (e.g. stuck switch or broken wire) at system startup
or during operation, it shall communicate the condition using the Error Range value. It may additionally display
an Alarm Mask on the connected VT.

When not in learn mode, the message shall be sent to the global address to be available to all Working Sets,
and the message is not acknowledged. When in learn mode, the message shall be sent to the VT whose
NAME indicates it is Function Instance zero, and the message is not acknowledged.

NOTE In learn mode, the messages are directed to the VT only to minimize the possibility that an implement would
interpret the message as a command. This may also improve the implementation of this feature in the VT, since it directly
receives this message.

NOTE This message is recommended to be sent at priority 3. This is consistent with the standard recommendations
for a message for control purposes, and prevents this message from being blocked by transport protocol and extended
transport protocol messages.

Transmission repetition rate: Once per second and on change to a maximum of twenty
messages per second. At least 50 ms shall pass between status
messages for a particular input. Every 200 ms, when a non-
latched Boolean input is held.
Data length: 8 bytes
Parameter group number: When not in learn mode: VT to ECU, sent to global address by
the Auxiliary Input unit when enabled.
When in learn mode: ECU to VT, sent to the VT where the
NAME indicates Function Instance zero.
Priority: 3

Byte 1 VT function = 3810

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0110 Parameter Auxiliary Input Type 2 Status
Bytes 2, 3 Auxiliary Input Object ID (0-65534)
Bytes 4, 5 Value 1 (See Table J.5 — Auxiliary Function Type 2 types)
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If Analog Value:
Resolution: 0.00155629 / bit
Offset: 0
Units: %
Valid Range: 000016 - FAFF16
Res. Range: FB0016 - FDFF16
Error Range: FE0016 - FEFF16
N/A Range: FF0016 - FFFF16

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 ISO 11783-6:2014(E)

If Digital Count:
Valid Range: 000016 – FFFF16
Bytes 6, 7 Value 2 (refer to Table J.5 — Auxiliary Function Type 2 types)
If Analog Value:

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Resolution: 0.00155629 / bit
Offset: 0
Units: %
Valid Range: 000016 - FAFF16
Res. Range: FB0016 - FDFF16
Error Range: FE0016 - FEFF16
N/A Range: FF0016 - FFFF16
If Digital Count:
Valid Range: 000016 – FFFF16
Byte 8 Operating State
Bit 0 = 1 = Learn mode active
Bit 1 = 1 = Input activated in learn mode, bit 0 must be 1
Bits 2-7 = Reserved, set to 0

J.7.10 Auxiliary Input Type 2 Maintenance message

An Auxiliary Input Working Set (not the individual input controls) shall send an Auxiliary Input Type 2
Maintenance message 10 times per second. The message is broadcast to all Working Sets (global address),
and is not acknowledged. This message shall be monitored by the VT and any Auxiliary Function Working Set
that has been assigned to input controls of that Auxiliary Input Working Set.

If the message is not detected by the Auxiliary Function Working Set for 300 ms, the Auxiliary Function
Working Set shall assume a possible unexpected shutdown of the Auxiliary Input Working Set and shall take
appropriate action, which shall include removing the assignment of all functions from that Auxiliary Input
Working Set.

The VT shall alert the operator if the Working Set for the Auxiliary Functions is present but the associated
Working Set for one or more Auxiliary Inputs is no longer present and an assignment to this Working Set has
previously (in this power cycle) been made. In this case the VT shall send an Auxiliary Assignment Type 2
command to the Auxiliary Function Working Set Master to remove any assignments to this Auxiliary Input that
were previously assigned. According to Clause J.7.5, Byte 10, Bit 7 of the Auxiliary Assignment Type 2
command shall be set to “1”, indicating that the Auxiliary Function Working Set Master shall not store this as
the new preferred assignment.

The Auxiliary Input Working Set shall conform to the connection management requirements defined in Clause
4.6.9. Therefore it shall send a Working Set Maintenance message once per second, in addition to the
Auxiliary Input Type 2 Maintenance message.

A Model Identification code, as defined by the manufacturer, is a proprietary code that defines a unique model
and version of an Auxiliary Input Unit. When a newer and incompatible version of an Auxiliary Input Unit is
created, it shall be assigned a unique Model Identification code by the manufacturer. The Model Identification
code shall not change at runtime.

The Status value indicates the readiness of the Auxiliary Inputs for assignment operations. This Status value
shall be initialized to “Initializing” when this message is started, and it shall be set to indicate “Ready” upon
receipt of an End of Object Pool response where there are no errors or upon receipt of a Load Version
response / Extended Load Version response with no errors indicated. Auxiliary Functions shall use the Ready
indication as a means to trigger the Preferred Assignment command. The Auxiliary Input unit can make run-
time changes to the available Auxiliary Inputs for the following reasons, in which case the Status shall indicate
“Initializing”.

⎯ Auxiliary Input makes available additional inputs in its pool (new input enabled)

⎯ Auxiliary Input needs to reload an existing unassigned Auxiliary Input object

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 ISO 11783-6:2014(E)

⎯ Auxiliary Input needs to remove an unassigned Auxiliary Input

Note If an Auxiliary Input device needs to changes its Object Pool because of changes to or the deletion of an
existing assigned Auxiliary Input object in its pool it shall stop transmitting the Auxiliary Input Type 2 Maintenance
message for greater than 500 ms and then re-establish transmission of the message with the status byte set to Initializing,
until after the pool transfer and an End of Object Pool response with no errors is received from the VT. This provides
Working Sets in the system with a means to safely disconnect and connect Auxiliary functions to Auxiliary Inputs. For all
changes made to Auxiliary Input objects that are NOT assigned to a function in the system, a transition of the status byte
from Ready to Initializing shall be used.

NOTE This message is recommended to be sent at priority 3. This is consistent with the standard recommendations
for a message for control purposes, and prevents this message from being blocked by transport protocol and extended
transport protocol messages.

Transmission repetition rate: 100 ms

Data length: 8 bytes
Parameter group number: ECU to VT, sent to global address
Priority: 3

Byte 1 VT function = 3510

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0011 Parameter Auxiliary Input Maintenance
Byte 2, 3 Model Identification Code of the Auxiliary Input Unit
(Manufacturer defined) in the range of 0 – FFFE16.
Byte 4 Status
0 = Initializing, pool is not currently available for assignment.
1 = Ready, pool has been loaded into the VT and is available
for assignments.
Bytes 5-8 Reserved, Set to FF16

J.7.11 Auxiliary Input Status Type 2 Enable command

The VT uses the Auxiliary Input Status Type 2 Enable command to enable or disable the Auxiliary Input status
message. This has the dual purpose of reducing unnecessary network messaging, and reducing the
possibility of an Auxiliary Function responding to an unassigned Auxiliary Input.

Once the VT has transmitted an Auxiliary Input Status Type 2 Enable command, it shall wait for an
acknowledgement from the Auxiliary Input before a function will be assigned to this input. If an
acknowledgement is not received after 2 seconds, the VT shall send the command again. After 3
unsuccessful attempts, the VT shall alert the operator that the Auxiliary Input is not available.

Transmission repetition rate: On Auxiliary Input status enable or disable

Data length: 8 bytes
Parameter group number: VT to ECU, Destination-Specific

Byte 1 VT function = 3710

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0101 Parameter Auxiliary Input Status Enable
Byte 2, 3 Auxiliary Input Object ID (FFFF16 for all Auxiliary Inputs)
FFFF16 can only be used when byte 4 is set to disable
Byte 4 Enable
0 = disable the Auxiliary Input status message for the
specified input.
1 = enable the Auxiliary Input status message for the
specified input
Byte 5-8 Reserved, set to FF16

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 ISO 11783-6:2014(E)

J.7.12 Auxiliary Input Status Type 2 Enable response

The ECU shall send this message to acknowledge an Auxiliary Input Status Type 2 Enable command.

Transmission repetition rate: In response to an Auxiliary Input Status Type 2 Enable command
Data length: 8 bytes
Parameter group number: ECU to VT, Destination-Specific

Byte 1 VT function = 3710

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0101 Parameter Auxiliary Input Status Enable
Byte 2, 3 Auxiliary Input Object ID (FFFF16 for all Auxiliary Inputs) of the
Auxiliary Input to which this command is responding
Byte 4 Status
0 = this Auxiliary Input status message is disabled.
1 = this Auxiliary Input status message is enabled
Byte 5 Error Codes (0 = command accepted)
Bit 0 = 1 = Invalid Auxiliary Input Object ID
Bit 1 = 1 = any other error
Byte 6-8 Reserved, set to FF16

J.7.13 Auxiliary Capabilities request

This message is available in VT version 5 and later.

The Auxiliary Capabilities request permits any ECU to query the VT for the capabilities of Working sets which
support Auxiliary Inputs or Auxiliary Functions, as specified in Byte 2. This request is sent to the VT with
function instance zero only.

A Working Set with Auxiliary Functions may use this request to identify the capabilities of the Auxiliary Input
units as a method to provide Auxiliary Functions that will best support the current system.

The ECU may choose to monitor each instance of the Auxiliary Input Type 2 Maintenance message for the
“Ready” status, prior to sending this request.

Note There is no equivalent “Ready” status for the Auxiliary Function.

Transmission repetition rate: On request

Data length: 8 bytes
Parameter group number: ECU to VT, Destination Specific --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

Byte 1 VT function = 3910

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0111 Parameter Capabilities Request
Byte 2 Request Type
0 = Request capabilities of Auxiliary Input Unit(s)
1 = Request capabilities of Auxiliary Function Unit(s)
Byte 3-8 Reserved, set to FF16

J.7.14 Auxiliary Capabilities response

This message is available in VT version 5 and later.

The VT shall send this message in response to the Auxiliary Capabilities request. This message provides the
Auxiliary Input and Auxiliary Function capabilities, of the Auxiliary devices that have successfully sent their
object pools to the VT.

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 ISO 11783-6:2014(E)

Contained in this response is a complete listing of the known auxiliary units (input or function), and Set
Information (see Table J.8 — Set Information) within each unit. This information may be used to enable the
auxiliary functions according to the available auxiliary inputs. This information may also be used for diagnostic
purposes.

Table J.8 — Set Information

Byte Description Details
1 Number of Instances Indicates the number of input/function instances where
the described Function attribute and Assigned attribute
are the same.
2 Function attribute See Table J.2 — Auxiliary Function Type 2 attributes and
record format and Table J.4 — Auxiliary Input Type 2
attributes and record format
3 Assigned attribute Bit 0 = 0 = auxiliary input
Bit 0 = 1 = auxiliary function
Bit 1 = 1 = input is assigned

Transmission repetition rate: Response to the Auxiliary Capabilities

Data length: Variable
Parameter group number: VT to ECU, Destination Specific

Byte 1 VT function = 3910

Bits 7 - 4 0010 Command Auxiliary Control
Bits 3 - 0 0111 Parameter Capabilities Request
Byte 2 Number of Auxiliary Units
{Repeat}
{
Bytes 3-10 [8 bytes] 64-bit NAME of the Auxiliary Unit
Byte 11 [1 byte] Number of different sets for this Auxiliary Unit
{Repeat} 3-bytes set information with the set and its amount
{
Byte 12 Number of Instances (Set Information Byte 1)
Byte 13 Function attribute (Set Information Byte 2)
Byte 14 Assigned attribute (Set Information Byte 3)
Bit 0 = 0 auxiliary input
Bit 0 = 1 auxiliary function
Bit 1 = 1 Input is assigned
}
}

J.8 Learn Mode

The VT may provide a “learn mode” feature allowing the operator to assign Auxiliary Functions to Auxiliary
Inputs by pressing the respective input. This feature shall only be active as long as the VT’s auxiliary
assignment screen is displayed. It is proprietary to the VT how to allow the operator to enable and/or disable
“learn mode”.

As long as “learn mode” is enabled, the VT shall indicate this in its VT Status message (see Clause G.2).

As long as “learn mode” is active:

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 ISO 11783-6:2014(E)

⎯ Any Auxiliary Input shall send the Auxiliary Input status message (see Clause J.7.9 Auxiliary Input Type 2
Status message) at the normal rate even if not enabled by the VT. The PGN used to send this message is
defined in Clause J.7.9.

⎯ The VT shall monitor the Auxiliary Input status message(s) and assign the actual selected Auxiliary
Function to the respective Auxiliary Input (it is proprietary to the VT how to display/select Auxiliary
Functions for assignment).

⎯ The Auxiliary Function Working Sets shall not perform any Auxiliary Function caused by Auxiliary Input
Status messages if the VT Status message indicates learn mode.

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 ISO 11783-6:2014(E)

Annex K
(normative)

Extended transport protocol

K.1 General
The VT shall use the transport protocol and extended transport protocol messages defined in ISO 11783-3 for
the transfer of data messages longer than 8 bytes.

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 ISO 11783-6:2014(E)

Annex L
(normative)

Character sets

The following tables are for reference only. Refer to the individual ISO documents for the most accurate
representation of the character sets.

The table horizontal boldface characters are the single hexadecimal digit representing the lower nibble of the
code for the character. Vertical boldface characters are the hexadecimal digits representing the upper
nibble(s) of the code for the character (e.g. @ = 4016 = 0100 00002).

Table L.1 — ISO 8859-1 (Latin 1) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           LF   CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m n o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP ¡ ¢ £ ¤ ¥ ¦ § ¨ © ª « ¬ - ® ¯
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

B ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿
C À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï
D Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß
E à á â ã ä å æ ç è é ê ë ì í î ï
F ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 Non-printing characters in strings for processing rules
0016 Causes termination of the string presentation

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 ISO 11783-6:2014(E)

Table L.2 — ISO 8859-15 (Latin 9) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           
LF  CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m n o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP ¡ ¢ £ € ¥ Š § š © ª « ¬ - ® ¯
B ° ± ² ³ Ž µ ¶ · ž ¹ º » Œ œ Ÿ ¿
C À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï
D Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß
E à á â ã ä å æ ç è é ê ë ì í î ï
F ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 Non-printing characters in strings for processing rules
0016 Causes termination of the string presentation
NOTE Version 2 and prior VTs had 4 errors in the ISO 8859-15 table that are corrected in Version 3:
A616 Version 2: Ŝ, Version 3: Š
A816 Version 2: ŝ, Version 3: š
B416 Version 2: Ẑ , Version 3: Ž
B816 Version 2: ẑ , Version 3: ž

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 ISO 11783-6:2014(E)

Table L.3 — ISO 8859-2 (Latin 2) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           LF   CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m N o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP Ą ˘ Ł ¤ Ľ Ś § ¨ Š Ş Ť Ź - Ž Ż
B ° ą ˛ ł ´ ľ ś ˇ ¸ š ş ť ź ˝ Ž ż
C Ŕ Á Â Ă Ä Ĺ Ć Ç Č É Ę Ë Ě Í Î Ď
D Đ Ń Ň Ó Ô Ő Ö × Ř Ů Ú Ű Ü Ý Ţ ß
E ŕ á â ă ä ĺ ć ç č é ę ë ě í Î ď
F đ ń ň ó ô ő ö ÷ ř ů ú ű ü ý Ţ ˙
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 for processing rules
0016 Causes termination of the string presentation
NOTE: This character set is required in VT version 4 and later.

296 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Table L.4 — ISO 8859-4 (Latin 4) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           LF   CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m n o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP Ą ĸ Ŗ ¤ Ĩ Ļ § ¨ Š Ē Ģ Ŧ - Ž ¯
B ° ą ˛ ŗ ´ ĩ ļ ˇ ¸ š ē ģ ŧ Ŋ ž ŋ
C Ā Á Â Ã Ä Å Æ Į Č É Ę Ë Ė Í Î Ī
D Ð Ņ Ō Ķ Ô Õ Ö × Ø Ų Ú Û Ü Ũ Ū ß
E ā á â ã ä å æ į č é ę ë ė í î ī
F đ ņ ō ķ ô õ ö ÷ ø ų ú û ü ũ ū ˙
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 for processing rules
0016 Causes termination of the string presentation
NOTE: This character set is required in VT version 4 and later.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

Table L.5 — ISO 8859-5 (Cyrillic) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           LF   CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m N o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP Ё Ђ Ѓ Є Ѕ І Ї Ј Љ Њ Ћ Ќ - Ў Џ
B А Б В Г Д Е Ж З И Й К Л М Н О П
C Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
D а б в г д е ж з и й к л м н О п
E р с т у ф х ц ч ш щ ъ ы ь э Ю я
F № ё ђ ѓ є ѕ і ї ј љ њ ћ ќ § Ў Џ
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 for processing rules
0016 Causes termination of the string presentation
NOTE: This character set is required in VT version 4 and later.

298 --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---
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 ISO 11783-6:2014(E)

Table L.6 — ISO 8859-7 (Greek) character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
0           LF   CR  
1                
2 space ! " # $ % & ' ( ) * + , - . /
3 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4 @ A B C D E F G H I J K L M N O
5 P Q R S T U V W X Y Z [ \ ] ^ _
6 ` a b c d e f g h i j k l m n o
7 p q r s t u v w x y z { | } ~ 
8                
9                
A NBSP ‘ ’ £ € ₯ ¦ § ¨ © ͺ « ¬ - ―
B ° ± ² ³ ΄ ΅ Ά · Έ Ή Ί » Ό ½ Ύ Ώ
C ΐ Α Β Γ ∆ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο
D Π Ρ Σ Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί
E ΰ α β γ δ ε ζ η θ ι κ λ µ ν ξ ο
F π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ
 Indicates control codes and shall not be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 for processing rules
0016 Causes termination of the string presentation
NOTE: This character set is required in VT version 4 and later.
--```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

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 ISO 11783-6:2014(E)

Table L.7 — WideString minimum character set

0 1 2 3 4 5 6 7 8 9 A B C D E F
000           LF   CR  
001                
002 space ! " # $ % & ' ( ) * + , - . /
003 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
004 @ A B C D E F G H I J K L M N O
005 P Q R S T U V W X Y Z [ \ ] ^ _
006 ` a b c d e F g h i j k l m N o
007 p q r s t u V w x y z { | } ~ 
008                
009                
00A NBSP ¡ ¢ £ ¤ ¥ ¦ § ¨ © ª « ¬ - ® ¯
00B ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿
00C À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï
00D Ð Ñ Ò Ó Ô Õ ö × Ø Ù Ú Û Ü Ý Þ ß
00E à á â ã ä å æ ç è é ê ë ì í î ï
00F ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý Þ ÿ
0 1 2 3 4 5 6 7 8 9 A B C D E F
010 Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď
011 Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ
012 Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ Ī ī Ĭ ĭ Į į
013 İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ Ľ Ŀ
014 ŀ Ł ł Ń ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ
015 Ő ő Œ œ Ŕ ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ Ş ş
016 Š š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ ŭ Ů ů
017 Ű ű Ų ų Ŵ ŵ Ŷ ŷ Ÿ Ź ź Ż ż Ž Ž
0 1 2 3 4 5 6 7 8 9 A B C D E F
02C ˆ ˇ ¯
02D ˘ ˙ ˚ ˛ ˜ ˝
0 1 2 3 4 5 6 7 8 9 A B C D E F
037 ;
038 ΄ ΅ Ά · Έ Ή Ί Ό Ύ Ώ
039 ΐ Α Β Γ ∆ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο
03A Π Ρ Σ Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί
03B ΰ α β γ δ ε ζ η θ ι κ λ µ ν ξ ο
03C π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ
0 1 2 3 4 5 6 7 8 9 A B C D E F
040 Ё Ђ Ѓ Є Ѕ І Ї Ј Љ Њ Ћ Ќ Ў Џ
041 А Б В Г Д Е Ж З И Й К Л М Н О П
042 Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
043 а б в г д е ж з и й к л м н о п
044 р с т у ф х ц ч ш щ ъ ы ь э ю я

300 © ISO 2014 – All rights reserved

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 ISO 11783-6:2014(E)

0 1 2 3 4 5 6 7 8 9 A B C D E F
045 ё ђ ѓ є ѕ і ї ј љ њ ћ ќ ў Џ
20A €
 Indicates character codes which shall not be displayed.
Blank Indicates character codes which are not compulsory but may be displayed.
NBSP Non-breaking space (word-wrap rules do not apply)
CR,LF See Clause 4.6.19.6 for processing rules
000016 Causes termination of the string presentation
NOTE: This character set is required in VT version 4 and later.

© ISO 2014 – All rights reserved --```,`,`,,``,,````,,,,,``,`,,-`-`,,`,,`,`,,`---

301
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 ISO 11783-6:2014(E)

Bibliography

[1] SAE1) J 1939/72, Recommended Practice for Serial Control and Communications Data Network —
Part 72: Virtual Terminal

[2] DIN2) 9684-4, Agricultural tractors and machinery — Interfaces for signal transfer — Part 4: User terminal

[3] ISO 7498, Information processing systems — Open Systems Interconnection — Basic Reference Model

[4] ISO 11519-1, Road vehicles — Low-speed serial data communication — Part 1: General and definitions

[5] ISO 11898, Road vehicles — Interchange of digital information — Controller area network (CAN) for high-
speed communication

[6] ISO 639 (all parts), Codes for the representation of names of languages

[7] ABRASH, M. Zen of Graphics Programming. Scottsdale, AZ: The Coriolis Group Inc. 1996

[8] FOLEY, J., et al. Computer Graphics: Principals and Practise, Second Edition in C Reading MA: Addison-
Wesley, 1996

[9] MURPHY N. GUI Development: Embedding Graphics, Part I. Embedded Systems Magazine, July, 1999

[10] MURPHY N. GUI Development: Embedding Graphics, Part II. Embedded Systems Magazine, August, 1999

[11] ISO/IEC 8859-1:1998, Information technology — 8-bit single-byte coded graphic character sets — Part 1:
Latin alphabet No. 1

[12] ISO/IEC 8859-15:1999, Information technology — 8-bit single-byte coded graphic character sets —
Part 15: Latin alphabet No. 9

[13] ISO/IEC 10646:2012, Information technology — Universal Coded Character Set (UCS)

1) US Society of Automotive Engineers.

2) Deutsches Institut für Normung e.V.

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 ISO 11783-6:2014(E)

ICS 35.240.99; 65.060.01

Price based on 302 pages

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