TAC Xenta® 421A/422A 0FL-4181-000
Universal Input and
Configuration Instruction
Digital Output Module
LONMARK CONFIGURATION AND VARIABLES
Physical Inputs and Outputs nvoDigital1-4 (DI, any type; switch:value=0)
TAC Xenta 421A/422A can be used as a normal Xenta I/O switch:state
module or as a certified LONMARK® device. It has state=0: Off (state=255: invalid)
• 4 Universal Inputs (UI) state=1: On
• 5 Digital Outputs (DO) nvoTemp1-4 (thermistor, any type; invalid=327.67)
In addition, TAC Xenta 422A has five manual switches, one
for each DO that can be set
UI Value Transmission
• manual Off
• manual On The UI value will be transmitted
• Auto a) when the change in value is large enough (set individually
per UI)
To configure the inputs and outputs, and to specify the
transmission of values, either ordinary TAC Menta®/Xenta b) at a specified time interval (common for all UIs)
configuration or nci SNVTs are used. The usage is explained
overleaf ("SNVT vs TAC Xenta I/O module Communication".) a) is determined by
The use of SNVTs requires explicit information listed below. nciSndDelta1-4 (dimensionless; default value=2)
Size of change to cause transmission
UI Configuration Ex.: 1 means
Each of the four UI:s (1-4) is configured with - if configured as analog input: 1%
- if configured as temperature input: 1 °
nciInput1-4 0 = not connected (default value)
1 = 1.8 kohm thermistor If the UI is configured as a digital input, a status change will
always be transmitted.
2 = DI, green indication
3 = 0-10 V b) is determined by
4 = 0-20 mA nciSndHrtBt "Heartbeat" interval in seconds (default=60)
5 = 10 kohm thermistor A valid and configured UI value will be sent at least once
6 = DI, red indication during each interval regardless of change.
7 = DI, green inverted indication The transmissions will be distributed over time to avoid
8 = DI, red inverted indication momentary communication overload.
If configured to be a digital input (DI, any type), its function is DO Values
further determined by the corresponding bit in
The digital output values to the output (DO, n=1-5) are
nciDigInNONC: received as:
Bit 0 Bit 15
nviDO1-5 switch:state
state=0 or >1: Off
DI 1
state=1: On
DI 2
DI 3 For the TAC Xenta 422A, the DO values may be overridden
DI 4 by manual switches. Their status is indicated in
nvoHandBoard1-5 switch:state.
If bit=0: NO, normally open (default value) state=0: manual Off
If bit=1: NC, normally closed state=1: manual On
Pulse counting is not available for SNVT communication. state=255 ('invalid'): Auto
Any DO status change will immediately be transmitted.
UI Values
Depending on the UI configuration, each UI n=1-4 generates DO Values in the Off-line Condition
a valid value in one of these (the other two are set invalid): The DO values are expected to be updated regularly.
nvoAnalog1-4 (0-10 V or 0-20 mA, converted to 0-100%; However, this may be prevented by communication failure or,
invalid=163.835) temporarily, after power-up.
(continued ...)
0FL-4181-000, 21 Sep 2004 English 1 (4)
To determine if all nviDO1-5 are to be considered valid, an If bit=0: Keep latest value (default).
interval counter is used: If bit=1: Use default value as specified by
nciRcvHrtBt No. of seconds until nviDO1-5 are considered nciOfflineVal, using the following bits, where the value to be
invalid. (0: function is not used; default value.) used is specified (0 or 1). (Default value=0.)
If this happens, due to communication failure, the behavior is
determined by
Bit 0 Bit 15
nciOfflineBeh, using the following bits:
Bit 0 Bit 15
DO 1
DO 2
DO 1 DO 3
DO 2 DO 4
DO 3 DO 5
DO 4
DO 5
SNVT vs TAC XENTA I/O MODULE COMMUNICATION
The TAC Xenta 421A/422A can be used in networks with However, output SNVT transmission is still performed using a
either LONMARK communication or TAC Xenta I/O module hard-coded interval of about 10 seconds.
communication. The device automatically determines which Once in the TAC Xenta I/O module communication state, the
type of communication to use. device can only enter the SNVT state after a new Power-up.
At this stage all nci:s must be updated, since the same
Green
memory area is used by both the SNVT and TAC Xenta I/O
Power-up off-line module communication configuration parameters.
blink
Note! As the TAC Xenta I/O module communication state is a
TAC Xenta I/O module 'dead-end' (until power-up), any mis-addressed communi-
SNVT
received
communication cation may cause the I/O module to loose its SNVT communi-
established
cation state.
TAC Xenta I/O module communication is inititiated by the
Green blink
TAC Xenta controller at events specified below. If an I/O module intended
I/O on-line:
at comm. SNVT I/O module for SNVT communication has been used in another
green 0.5 Hz
or 0.1 Hz TAC Xenta communication configuration and happens to have an address that is used by
I/O module
comm. the I/O module communication, the I/O module will be 'lost' in
State diagram
established this state.
TAC Xenta I/O module communications will be initiated by the
In the Power-up state, the green LED blinks "Off-line". The following events:
device is open for both SNVT and TAC Xenta I/O module • Controller power-up
communication. • I/O module power-up
Previous configuration, if defined, will apply until a change is • Controller application download
initiated.
• Recovery after communication failure
SNVT received Service pin
The device enters the SNVT state. The device is configured
when the nci:s are updated. The green LED will light up when
there is communication or approximately every 10 seconds.
SNVT transmission is determined by the nciSndDelta1-4 or
the nciSndHrtBt values.
Red LED (Configuration error)
The device remains in the SNVT state until a TAC Xenta I/O - blinking: unconfigured node
module communication state is established, or until the next - steady: appl.less (or hw fault)
power-up. In the SNVT state it is possible to change the
configuration by updating the network configuration inputs
nci:s.
TAC Xenta I/O module Communication
The TAC Xenta I/O module communication state is accepted
only after a thorough protocol initiation. This may be initiated Green LED (Communication)
at any time. - SNVT: at communication or ~ once in 10 sec.s
In the TAC Xenta I/O module communication state, no nvi:s or - TAC Xenta I/O mod communication:
nci:s can be used. The green LED blinks on-line at about 0.5 Hz. on-line ~ every other sec; off-line ~ 5 blinks per sec
Input SNVTs are ignored, also when the device is off-line from LED indicators on front panel
the controller.
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LONMARK OBJECTS AND NETWORK VARIABLES
0560 4-channel configurable I/O
Node Object
Object Type: #0
Mandatory Network Variables
nviRequest nvoStatus
nv1 nv2
SNVT_obj_request SNVT_obj_status
Configuration Properties
nciDigInNONC SNVT_state
Universal Input
Object Type: #0520
Mandatory Network Variables
nvoAnalog4
nv1
SNVT_lev_percent
Universal Input Manufacturer Network Variables
Object Type: #0520 nv1
nvoDigital4
SNVT_switch
Mandatory Network Variables nvoTemp4
nv2
SNVT_temp_p
nvoAnalog1
nv1
SNVT_lev_percent
Configuration Properties
Manufacturer Network Variables
nciInput4 SNVT_count
nvoDigital1 nciSndDelta4 SNVT_multiplier
nv1
SNVT_switch
nvoTemp1
nv2
SNVT_temp_p
○
○
○
○
Configuration Properties ○
○
○
○
○
○
nciInput1 SNVT_count ○
○ Objects 1–4
nciSndDelta1 SNVT_multiplier ○
○
○
○
○
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420 Dig Outs
Object Type: #20543
Mandatory Network Variables
Manufacturer Network Variables
nviDO1 nvoHandBoard1
nv1 nv6
SNVT_switch SNVT_switch
nviDO2 nvoHandBoard2
nv2 nv7
SNVT_switch SNVT_switch
nviDO3 nvoHandBoard3
nv3 nv8
SNVT_switch SNVT_switch
nviDO4 nvoHandBoard4
nv4 nv9
SNVT_switch SNVT_switch
nviDO5 nvoHandBoard5
nv5 nv10
SNVT_switch SNVT_switch
Configuration Properties
nciSndHrtBt SNVT_time_sec
nciRcvHrtBt SNVT_time_sec
nciOfflineBeh SNVT_state
nciOfflineVal SNVT_state
TAC Vista®, TAC Menta®, TAC Xenta® and Talking Buildings® are registered trademarks of TAC AB. LON®, LonMark® and LonWorks® are registered trademarks of the Echelon Corporation.
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4 (4) English 0FL-4181-000, 21 Sep 2004
