Temperature Controllers

USER MANUAL
Bulletin 900-TC8, 900-TC16, & 900-TC32

Series B
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Important User Information Because of the variety of uses for the products described in this publication,
those responsible for the application and use of this control equipment must
satisfy themselves that all necessary steps have been taken to assure that
each application and use meets all performance and safety requirements,
including any applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in

this guide are intended solely for purposes of example. Since there are many
variables and requirements associated with any particular installation,
Rockwell Automation does not assume responsibility or liability (to include
intellectual property liability) for actual use based upon the examples shown
in this publication.

Rockwell Automation publication SGI-1.1, Safety Guidelines for the

Application, Installation and Maintenance of Solid-State Control (available
from your local Allen-Bradley sales office), describes some important
differences between solid-state equipment and electromechanical devices
that should be taken into consideration when applying products such as
those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or

part, without written permission of Rockwell Automation, is prohibited.

Safety Precautions Safety Signal Words

This manual uses the following signal word to mark safety precautions for the
Bulletin 900-TC8, 900-TC16, and 900-TC32 Temperature/Process
Controllers.

These precautions provide important information for the safe application of

the Temperature/Process Controller. You must make sure to follow the
instructions provided in all safety precautions.:

Identifies information about practices or circumstances

ATTENTION
that can lead to personal injury or death, property damage

!
or economic loss
4

Attention statements help you to:

• identify a hazard
• avoid a hazard
• recognize the consequences

IMPORTANT Identifies information that is critical for successful

application and understanding of the product.

Trademark List
900Builder and 900BuilderLite are registered trademarks of Rockwell Automation, Inc.

European Communities (EC) Directive Compliance

If this product has the CE mark it is approved for installation within the
European Union and EEA regions. It has been designed and tested to meet
the following directives.

EMC Directive

This product is tested to meet the Council Directive 89/336/EC

Electromagnetic Compatibility (EMC) by applying the following standards,
in whole or in part, documented in a technical construction file:

EN 61326 EMC Requirements — Electrical Equipment for Control,

Measurement and Laboratory Use

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low Voltage,

by applying the safety requirements of EN 61010-1 Safety Requirements
for Electrical Equipment for Control, Measurement and Laboratory Use —
General Requirements. For specific information, see the appropriate
sections in this publication, as well as the Allen-Bradley publication
Industrial Automation Wiring and Grounding Guidelines For Noise
Immunity, Publication 1770-4.1.

This equipment is classified as open equipment and must be mounted in an

enclosure during operation to provide safety protection.
 Table of Contents
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety Signal Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
European Communities (EC) Directive Compliance . . . . . . . . . 1-4
Low Voltage Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table of Contents

Preface Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . P-i

Meanings of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-i
Series B Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
Series B Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
900-TC8x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
900-TC16x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
900-TC32x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
Terminal Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-iv
Body Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-v
900-TC8, 900-TC16, & 900-TC32 Ratings . . . . . . . . . . . . . . . . . . . . P-vi
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-vi
Communications Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-vii
Other Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-viii
Option Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ix
How to Read Display Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-x

Chapter 1

Bulletin 900 Input & Output I/O Configurations & Main Functions. . . . . . . . . . . . . . . . . . . . . . . . 1-1
Overview Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Main Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Controller Hardware Versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
900-TC8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
900-TC16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
900-TC32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Front Panels & General Functions . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Display Meanings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Operation Indicators 1,2,3... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Basic Keypad Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Chapter 2

Preparations Hardware Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Approximate Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Panel Cutout Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
System Wiring and Installation Guidelines. . . . . . . . . . . . . . . . . . 2-4
Panel Mounting — 900-TC8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Setting Up the 900-TC8 Controller with the Optional Units . . . 2-9

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Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Bulletin 900 Wiring Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Wiring Guidelines and Precautions. . . . . . . . . . . . . . . . . . . . . . . 2-17
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Using the Direct PC Communications Port . . . . . . . . . . . . . . . . . . . 2-30
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

Chapter 3

Configuration & Basic Operation How Function Groups Are Configured and Operating the Keys on the
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Selecting Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Changing Parameters/Loading Values into Controller Memory. 3-7
Communications Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Setting Up Communications Parameter Data . . . . . . . . . . . . . . . 3-9
Initial Setup Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Configuring the Input Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Input Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Selecting °C/°F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Temperature Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Configuring the SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Changing the SP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Selecting PID Control or ON/OFF Control . . . . . . . . . . . . . . . . . . 3-16
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
2-PID Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
ON/OFF Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Configuring the Output Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Control Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Direct/Reverse Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Assigned Output Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Auxiliary Output Opening or Closing in Alarm . . . . . . . . . . . . . . . . 3-25
Executing the ON/OFF Control Method . . . . . . . . . . . . . . . . . . . . 3-25
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
ON/OFF Control Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
ON/OFF Control Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Determining PID Constants (AT, ST, Manual Setup) . . . . . . . . . . . 3-30
AT (Auto-Tuning) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
ST (Self-Tuning). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33
Conditions that Start Self-Tuning (SRT) . . . . . . . . . . . . . . . . . . 3-34
Self-Tuning (ST) Stable Range . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
RT (Robust Tuning). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Manual PID Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Alarm Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Alarm Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

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PV Change Rate Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45

Precaution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Heater Burnout Alarm (HBA), Heater Short Alarm (HSA), and Heater
Overcurrent Alarm (HOA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
HBA, HSA, and HOA Alarm Detection . . . . . . . . . . . . . . . . . . 3-46
Installing Current Transformers (CT). . . . . . . . . . . . . . . . . . . . . 3-48
How to Calculate Heater Current Detection Values . . . . . . . . . 3-50
Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-51
Heater Burnout Alarm (HBA) Setup . . . . . . . . . . . . . . . . . . . . . 3-55
HS Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-58
Heater Overcurrent Alarm Set-up. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60
Moving to the Advanced Setting Function Group . . . . . . . . . . 3-60
Configure Overcurrent Detection. . . . . . . . . . . . . . . . . . . . . . . . 3-61
Set-up of the No. 3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62
MV Display for Heating and Cooling Control . . . . . . . . . . . . . . . . . 3-63
System Setup/Operational Considerations. . . . . . . . . . . . . . . . . . . . 3-65

Chapter 4

Parameter Adjustments & Shifting Input Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Application Considerations 1-Point (Uniform) Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2-Point Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
How to Calculate Input Shift Values . . . . . . . . . . . . . . . . . . . . . . 4-3
Using the 1-Point Shift Method . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Using the 2-Point Shift Method . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Alarm Functions/Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Alarm Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Standby Alarm Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Alarm Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Summary of Alarm Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Configuration of Scaling Upper-Limits and Scaling Lower-Limits for
Analog Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Executing the Heating and Cooling Control Mode . . . . . . . . . . . . . 4-12
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Dead Band (Heating and Cooling Control) . . . . . . . . . . . . . . . . 4-13
Setup of Heating and Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Using the Event Input Feature — 900-TC8 & 900-TC16 . . . . . . . . 4-16
Multi-SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Selecting Multi-SP by Keypad Operation . . . . . . . . . . . . . . . . . . 4-19
Multi-SP Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Executing RUN/STOP Controller Mode Change. . . . . . . . . . . 4-23
Switching Between Auto and Manual Control . . . . . . . . . . . . . . 4-23
Controlling the Start of the Simple Program Function . . . . . . . 4-23
Control by Inverting Direct/Reverse Operation . . . . . . . . . . . . 4-24

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Switching 100% AT Execute/Cancel . . . . . . . . . . . . . . . . . . . . . 4-24

Switching 40% ATExecute/Cancel . . . . . . . . . . . . . . . . . . . . . . 4-25
Switching Setting Change Enable/Disable. . . . . . . . . . . . . . . . . 4-25
Switching Alarm Latch Cancel . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Configuring the SP Upper- and Lower-Limit Values. . . . . . . . . . . . 4-26
Set Point Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Set Point Limit Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Executing the SP Ramp Function to Limit the SP Rate of Change 4-29
SP Ramp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
SP Ramp Application Considerations. . . . . . . . . . . . . . . . . . . . . 4-30
To Move to the Advanced Setting Function Group . . . . . . . . . . . . 4-31
Using the Key Protect Function Group . . . . . . . . . . . . . . . . . . . . . . 4-33
Key Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
PV Color Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
PV Color Change Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
Alarm Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Alarm Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Loop Break Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Loop Break Alarm (LBA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Performing Manual Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53
Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53
Manual MV Limit Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54
Using the Transfer Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-62
Transfer Output Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-62
Using the Simple Program Function . . . . . . . . . . . . . . . . . . . . . . . . . 4-66
Simple Program Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-66
Operation at the Program End . . . . . . . . . . . . . . . . . . . . . . . . . . 4-69
Output Adjustment Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75
Output Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75
MV at Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75
MV at PV Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-76
Using the Extraction of Square Root Parameter . . . . . . . . . . . . 4-77
Setting the Rate of MV Variation . . . . . . . . . . . . . . . . . . . . . . . . 4-80
Setting the PF Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-82
Monitor/Setting Item. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-83
Monitor/Setting Item . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-83
Counting Control Output ON/OFF Operations . . . . . . . . . . . . . . 4-87
Control Output ON/OFF Count Function. . . . . . . . . . . . . . . . 4-87
Displaying PV/SV Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-90

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Chapter 5

Parameter Functions & Definitions Conventions Used in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

About the Parameter Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Protect Function Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Move to Protect Function Group. . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Operation/Adjustment Protection . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Initial Setting/Communications Protection . . . . . . . . . . . . . . . . . 5-4
Setting/Configuration Change Protection . . . . . . . . . . . . . . . . . . 5-4
PF Key Protect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Parameter Mask Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Password to Move to Protect Function Group . . . . . . . . . . . . . . 5-5
Operation Function Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
PV (Process Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
PV/SP – Process Value/Set Point – No. 1 Display
PV/SP – Process Value/Set Point – No. 2 Display (900-TC8) . 5-8
No. 3 Display (900-TC8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Auto Manual Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Multi-SP (Set Point 0…3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Set Point During SP Ramp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Heater Current 1 Value Monitor. . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Heater Current 2 Value Monitor. . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Leakage Current 1 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Leakage Current 2 Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Program Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Soak Time Remain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
RUN/STOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Alarm Value 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Alarm Value 2 (900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . 5-17
Alarm Value 3 (900-TC8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Upper-Limit Alarm Value 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Lower-Limit Alarm Value 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Upper-Limit Alarm Value 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Lower-Limit Alarm Value 2 (900-TC8, 900-TC16) . . . . . . . . . . 5-19
Upper-Limit Alarm Value 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
Lower-Limit Alarm Value 3 (900-TC8 only) . . . . . . . . . . . . . . . 5-20
MV Monitor (Heating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
MV Monitor (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Adjustment Function Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Adjustment Function Group Display . . . . . . . . . . . . . . . . . . . . . 5-24
AT Execute/Cancel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Communications Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Heater Current 1 Value Monitor. . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Heater Current 1 Value Monitor. . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Leakage Current 1 Monitor (900-TC8, 900-TC16) . . . . . . . . . . 5-28

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Leakage Current 2 Monitor (900-TC8, 900-TC16) . . . . . . . . . . 5-29

Heater Burnout Detection 1 (900-TC8, 900-TC16). . . . . . . . . . 5-30
Heater Burnout Detection 2 (900-TC8, 900-TC16). . . . . . . . . . 5-31
HS Alarm 1 (900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . 5-31
HS Alarm 2 (900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . 5-32
Set Point 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
Set Point 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
Set Point 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
Set Point 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
Temperature Input Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34
Upper-Limit Temperature Input Shift Value,
Lower-Limit Temperature Input Shift Value . . . . . . . . . . . . . . . 5-35
Proportional Band, Integral Time, Derivative Time . . . . . . . . . 5-35
Cooling Coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36
Dead Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37
Manual Reset Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
Hysteresis (Heating)
Hysteresis (Cooling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
Soak Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-39
Wait Band. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40
MV at Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40
MV at PV Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41
SP Ramp Set Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41
MV (Manipulated Variable) Upper-Limit,
MV (Manipulated Variable) Lower-Limit . . . . . . . . . . . . . . . . . . 5-42
MV Upper-Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-42
MV Lower-Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-43
MV (Manipulated Variable) Change Rate Limit, . . . . . . . . . . . . 5-43
Extraction of Square Root Low-cut Point,. . . . . . . . . . . . . . . . . 5-44
Monitor/Setting Item Level (900-TC8) . . . . . . . . . . . . . . . . . . . . . . 5-45
Monitor/Setting Item Display 1 to 5 . . . . . . . . . . . . . . . . . . . . . 5-45
Manual Control Function Group . . . . . . . . . . . . . . . . . . . . . . . . 5-46
PV/MV (Manual MV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-47
Initial Setting Function Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-48
Input Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-50
Scaling Upper-Limit, Scaling Lower-Limit, Decimal Point . . . . 5-52
Temperature Units (°C/°F) Selection. . . . . . . . . . . . . . . . . . . . . 5-53
Set Point Upper-Limit, Set Point Lower-Limit . . . . . . . . . . . . . 5-54
PID ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55
Standard or Heating/Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55
ST Self-Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-56
Program Pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-57
Control Period (Heat) ,Control Period (Cool) . . . . . . . . . . . . . . 5-57
Direct/Reverse Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-58
Alarm Type for Alarm 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-59

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Alarm Type for Alarm 2 (900-TC8 & 900-TC16) . . . . . . . . . . . 5-59

Alarm Type for Alarm 3 (900-TC8) . . . . . . . . . . . . . . . . . . . . . . 5-59
Alarm 1 Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-61
Alarm 2 Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-62
Alarm 3 Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-62
Transfer Output Type (900-TC8, 900-TC16). . . . . . . . . . . . . . . 5-62
Transfer Output Upper-Limit
Transfer Output Lower-Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-63
Linear Current Output (900-TC8, 900-TC16) . . . . . . . . . . . . . . 5-64
Number of Multi-SP Uses (900-TC8, 900-TC16) . . . . . . . . . . . 5-65
Event Input Assignment (* 1 and 2) (900-TC8, 900-TC16) . . . 5-66
Extraction of Square Root Enable (900-TC8, 900-TC16) . . . . . 5-68
Move to Advanced Setting Function Group . . . . . . . . . . . . . . . 5-68
Advanced Setting Function Group . . . . . . . . . . . . . . . . . . . . . . . . . . 5-69
Parameter Initialize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71
Multi-SP Uses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71
SP Ramp Time Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71
Standby Sequence Reset Method . . . . . . . . . . . . . . . . . . . . . . . . 5-72
Auxiliary Output * Open in Alarm . . . . . . . . . . . . .(* = 1 to 3) 5-73
HB ON/OFF (900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . 5-74
Heater Burnout Latch (900-TC8, 900-TC16). . . . . . . . . . . . . . . 5-74
Heater Burnout Hysteresis (900-TC8, 900-TC16) . . . . . . . . . . . 5-75
ST (Self-Tuning) Stable Range . . . . . . . . . . . . . . . . . . . . . . . . . . 5-75
α . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-76
AT Calculated Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-77
AT Hysteresis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-77
Limit Cycle MV Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-77
Input Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-77
Additional PV Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-78
Manipulated Variable (MV) Display . . . . . . . . . . . . . . . . . . . . . . 5-78
Automatic Display Return Time . . . . . . . . . . . . . . . . . . . . . . . . . 5-79
Alarm 1 Latch, Alarm 2 Latch, Alarm 3 Latch. . . . . . . . . . . . . . 5-79
Protect Function Group Move Time . . . . . . . . . . . . . . . . . . . . . 5-80
Input Error Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-81
Cold Junction Compensation Method . . . . . . . . . . . . . . . . . . . . 5-82
MB Command Logic Switching . . . . . . . . . . . . . . . . . . . . . . . . . 5-82
PV Color Change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-82
PV Stable Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-84
Alarm 1 ON Delay, Alarm 2 ON Delay, Alarm 3 ON Delay . . 5-85
Alarm 1 OFF Delay, Alarm 2 OFF Delay, Alarm 3 OFF Delay 5-86
Input Shift Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-86
MV at Stop and Error Addition . . . . . . . . . . . . . . . . . . . . . . . . . 5-87
Auto/Manual Selection Addition . . . . . . . . . . . . . . . . . . . . . . . . 5-87
Robust Tuning (RT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-88
Heater Short Alarm (HSA) Use (900-TC8, 900-TC16) . . . . . . . 5-88
Heater Short Alarm (HSA) Latch (900-TC8, 900-TC16). . . . . . 5-89

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Heater Short Alarm (HSA) Hysteresis

(900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-89
Loop Break Alarm (LBA) Detection Time. . . . . . . . . . . . . . . . . 5-90
Loop Break Alarm (LBA) Level . . . . . . . . . . . . . . . . . . . . . . . . . 5-90
Loop Break Alarm (LBA) Band . . . . . . . . . . . . . . . . . . . . . . . . . 5-91
Control Output 1 Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . 5-92
Control Output 2 Assignment (900-TC8 & 900-TC16) . . . . . . 5-93
Auxiliary Output 1 Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 5-93
Auxiliary Output 2 Assignment (900-TC8, 900-TC16) . . . . . . . 5-94
Auxillary Output 3 Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 5-95
Character Select LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-96
Soak Time Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-96
Alarm SP Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-97
Manual MV Limit Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-97
PV Rate of Change Calculation Period. . . . . . . . . . . . . . . . . . . . 5-98
Automatic Cooling Coefficient Adjustment. . . . . . . . . . . . . . . . 5-98
Heater Overcurrent Use (900-TC8, 900-TC16) . . . . . . . . . . . . . 5-99
Heater Overcurrent Latch (900-TC8, 900-TC16) . . . . . . . . . . . 5-99
Heater Overcurrent Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . 5-100
(900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-100
PF Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-101
Monitor/ Setting Item * (*: 1 to 5) . . . . . . . . . . . . . . . . . . . . . . 5-102
PV/SP Display Screen Selection. . . . . . . . . . . . . . . . . . . . . . . . 5-103
MV Display Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-103
PV Decimal Point Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-104
PV Status Display Function . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-105
SV Status Display Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-106
Display Refresh Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-106
Control Output 1 ON/OFF Count Monitor. . . . . . . . . . . . . . 5-107
Control Output 2 ON/OFF Count Monitor
(900-TC8 & 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-107
Control Output 1 ON/OFF Count Alarm Set Value
(900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-107
Control Output 2 ON/OFF Count Alarm Set Value
(900-TC8, 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-108
ON/OFF Counter Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-108
Move to Calibration Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-109
Communications Setting Function Group . . . . . . . . . . . . . . . . . . . 5-109
Protocol Setting
Communications Unit No.
Communications Baud Rate
Communications Data Length
Communications Stop Bits
Communications Parity
Send Data Wait Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-110

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Chapter 6

Troubleshooting & Error Error Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Indication Input Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Display Range Exceeded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
AD Converter Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Memory Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Current Value Exceeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Heater Burnout Alarm (HBA)
Heater Short Alarm (HSA)
Heater Overcurrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Appendix A
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Heater Burnout Alarm (HBA), Heater Short Alarm (HSA), and
Heater Overcurrent Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
900-CPOEM1 USB-Serial Conversion Cable. . . . . . . . . . . . . . . A-5
Current Transformer (CT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Approximate External Dimensions . . . . . . . . . . . . . . . . . . . . . . A-7
Sensor Input Setting
and Indication Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Control Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Appendix B
Parameter Operations List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Function Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Setup Function Group Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16
Parameter Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-17

Appendix C

Calibration Parameter Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Registering Calibration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
User Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Calibrating Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Registering Calibration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Calibrating Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Calibrating 0…50 mV Analog Input. . . . . . . . . . . . . . . . . . . . . . . . . C-10
Calibrating Platinum Resistance Thermometers. . . . . . . . . . . . . . . . C-12
Calibrating Analog Input (e.g., 4…20 mA Analog Input) . . . . . . . . C-14
Calibrating an Analog Current Input (900-TC8 & 900-TC16) . C-14

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Calibrating an Analog Voltage (e.g., 1…5V DC) Input

(900-TC8 & 900-TC16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-16
Checking Indication Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-18
Checking Accuracy of a Thermocouple or Non-Contact
Temperature Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-18
Checking Indication Accuracy of a Platinum Resistance
Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-19
Analog Input (900-TC & 900-TC16) . . . . . . . . . . . . . . . . . . . . . C-20

Appendix D

Glossary Definition of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Index

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 Preface

Conventions Used in This Meanings of Abbreviations

Manual
The following abbreviations are used in parameter names, figures, and in text
explanations. These abbreviations mean the following:

Table P.A

Symbol Term
PV Process value
SP Set point
SV Set value
AT Auto-tuning
ST Self-tuning
HB Heater Burnout
HS Heater Short ➊
EU Engineering unit ➋
OC Overcurrent
LBA Loop Burnout Alarm

➊ A heater short indicates that the heater remains ON even when the control output from the Temperature
Controller is OFF because the SSR has failed or for any other reason.
➋ “EU” stands for Engineering Unit. EU is used as the minimum unit for engineering units such as °C, m, and g.
The size of EU varies according to the Input Type.
For example, when the input temperature setting range is –200…+1300°C, 1 EU is 1°C, and when the input
temperature setting range is –20.0…+500.0°C, 1 EU is 0.1°C.
For analog inputs, the size of EU varies according to the decimal point position of the scaling setting, and 1 EU
becomes the minimum scaling unit.

Note: For additional definitions of terms used in this manual, refer to

Appendix D, Glossary.

P-i Publication 900-UM007C-EN-E - January 2011

P-ii Preface

Series B Controllers Series B Upgrades

Series B controllers have the following upgrades.

900-TC8x

Although the upgraded controllers are compatible with the previous

controllers, terminal arrangements have been changed. Terminal sizes and
panel mounting depth have not been changed.

Other changes are outlined in the following tables. Refer to the relevant pages
in the manual for details.

900-TC16x

The upgraded controllers are basically compatible with the previous

controllers. Terminal arrangements, terminal sizes, and panel mounting depth
have not been changed.

900-TC32x

Model numbers have changed accompanying the introduction of universal

input capability. The default setting of the input type parameter of the
900-TC32x (models with resistance thermometers) has been changed from a
Pt100 resistance thermometer to a K thermocouple. Make sure the setting of
the input type parameter agrees with the temperature sensor that is being used.

The terminal block has also been changed, which means the wiring methods
and terminal arrangement are different.

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 Preface P-iii

Table P.B

Series A Series B

ALM1 ALM1
ALM2 ALM2
ALM3 ALM3
HA HA
900-TC16
OUT1 STOP OUT1 STOP
OUT2 CMW MANU OUT2 CMW MANU

• ALM indicator was changed to SUB indicator

SUB1 SUB2
ALM1 ALM2
HA SUB3
HA ALM3

900-TC8
OUT1
OUT2 STOP
CMW MANU
OUT1 STOP
OUT2 CMW MANU

• Number of displays: 2 (PV and SV) • Number of displays: 3 (PV, SV, and MV) ➊
• ALM indicator was changed to SUB indicator.

CMW STOP OUT CMW STOP OUT

MANU
SUB1

900-TC32
• Display Segments – PV: 7 segments, SV: 7 • Display Segments – PV: 11 segments, SV: 11
segments segments
• Character Heights – PV: 7 mm, SV: 3.5 mm • Character Heights – PV: 7.5 mm, SV: 3.6 mm
• Changes to Display Contents – “AL” LED indicator
eliminated, LED indicators and key indicator added

➊ A 2-level display is configured when shipped from the factory. A 3-level display is activated if parameters are
initialized.

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P-iv Preface

Terminal Arrangements
Table P.C — Terminal Arrangements

Series A Series B

Voltage output Long-life relay One CT One CT Control Output 2

output Two CTs Two CTs

14 + 14
Control Output 2
14 14 +
Control Output 2 CT1 CT1 Control Output 2
250 VAC, 3 A
15 − 12 VDC, 21 mA
15 (Resistive load)
15 15
CT2
−
CT2
A DO NOT
16 + 16 USE
mA
− −
DO NOT
B 17
−
USE
900-TC8 17
B
V 18 DO NOT
USE
A DO NOT
USE
+
18 mA
+ + − B −
19 −
19 TC/Pt universal input Analog input 19 V
B DO NOT
20 USE
+ +
TC/Pt universal input Analog input

Terminals 16...20 were changed and 1...15 were not.

900-TC16 --- No change for terminal layout

RS-495 A B B
Communications B(+) A(-) Universal
DO NOT DO NOT
USE USE - + TC/Pt Input
7 8 9 10 11 12

1 2 3 4 5 6
Input Control Auxillary
Power Output 1 Output 1
Supply
900-TC32
• 100 to 240 VAC
• 24 VAC/DC (no polarity)

Number of terminals: 14 (1 to 14)

Number of terminals: 9 (1 to 9) Input terminals: 10 to 12
Input terminals: 7 to 9 RS-485 communication terminals: 7 & 8
RS-485 communication terminals: 5 & 6

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 Preface P-v

Body Removal
Table P.D — Body Removal

Series A Series B
• Removal using screws • Removal using hooks

900-TC8

900-TC16 --- • No change for body removal

900-TC32 --- • No change for body removal

900-TC8, 900-TC16, &

900-TC32 Ratings
Table P.E — 900-TC8, 900-TC16, & 900-TC32 Ratings

Series A Series B
The following types of thermocouple input
---
were added: W and PLII.
Input sensor types for thermocouple inputs
Input range increased for E thermocouple:
Input range for E thermocouple: 0...600 ºC
-200...600 ºC
• Thermocouple: ±0.5% PV or ±1ºC, • Thermocouple: ±0.3% PV or ±1ºC,
whichever is greater) ±1 digit whichever is greater) ±1 digit
• Platinum resistance thermometer: • Platinum resistance thermometer:
Input accuracy (±0.5%PV or ±1ºC, whichever is (±0.2%PV or ±.08ºC, whichever is
greater) ± 1 digit greater) ± 1 digit
• Analog input: ±0.5% FS ± digit • Analog input: ±0.2% FS ± digit

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P-vi Preface

900-TC8, 900-TC16, &

900-TC32 Ratings
Table P.E — 900-TC8, 900-TC16, & 900-TC32 Ratings

Series A Series B
The following types of thermocouple input
---
were added: W and PLII.
Input sensor types for thermocouple inputs
Input range increased for E thermocouple:
Input range for E thermocouple: 0...600 ºC
-200...600 ºC
• Thermocouple: ±0.5% PV or ±1ºC, • Thermocouple: ±0.3% PV or ±1ºC,
whichever is greater) ±1 digit whichever is greater) ±1 digit
• Platinum resistance thermometer: • Platinum resistance thermometer:
Input accuracy (±0.5%PV or ±1ºC, whichever is (±0.2%PV or ±.08ºC, whichever is
greater) ± 1 digit greater) ± 1 digit
• Analog input: ±0.5% FS ± digit • Analog input: ±0.2% FS ± digit

• Thermocouple: 0.1ºC/Ω (except B, • Thermocouple: 0.1ºC/Ω (for all

R, S), 0.2ºC/Ω (B, R, S) specifications)
Influence of signal source resistance
• Platinum resistance thermometer: • Platinum resistance thermometer:
0.4ºC/Ω 0.1ºC/Ω
• Current output resolution, approx.: • Current output resolution, approx.:
Current outputs
2,700 10,000
• 250 VAC, 1A (900-TC16 & 900-TC32) • 250VAC, 3A (900-TC16)
Alarm outputs
• 250VAC, 2A (900-TC32)

Characteristics
Table P.F — Characteristics

Series A Series B
--- PV Status Display
PF Key Added

Front Panel
(900-TC8)

PF Key

PV/SP display selection for

---
three-level display
Square root extraction (for models
Inputs ---
with analog inputs)

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 Preface P-vii

Table P.F — Characteristics

Series A Series B
Control output ON/OFF count
---
Outputs alarm
--- MV change rate limiter
--- 40% AT
Controls Automatic cooling coefficient
--- adjustment for heating/cooling
control
--- PV rate of change alarm
Alarms OC alarm (only for models with
---
heater burnout detection)
Inverting direct/reverse operation
Other --- using event inputs or
communications commands

Communications
Characteristics Table P.G

Series A Series B
Communication Word access and double
Double word access only
Access Size word access
Composite Read from
Communication Variable Area and
---
Service Composite Write to
Variable Area
Communications
40 bytes 217 bytes
buffer size
38.4 kbits/s max. (900-TC08, 900-TC16)
Baud rate 57.6 kbits/s max.
19.2 kbits/s max. (900-TC32)
RS-485/RS-232C external
RS-485/RS-232C external
communications and
External communications and communications
communications via
communications via 900BuilderLite ™ cannot be used at
900BuilderLite ™ can be
the same time.
used at the same time.

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P-viii Preface

Other Upgrades
Table P.H

Series A Series B

Mounting Bracket
(900-TC8 only) Modified section

Note: The mounting bracket for the Series A

models cannot be used for Series B models.

Terminal Cover for 900-TC16

Note: The terminal covers for the Series A

models cannot be used for Series B models.

Terminal Cover for 900-TC8

Note: The terminal covers for the Series A

models cannot be used for Series B models.

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 Preface P-ix

Option Units
(Series B Controller Compatible— One Option Unit per Controller)

This unit provides communications event input etc. functionality.

Table P.I

Bulletin No. Name Function Cat. No. (Series)

RS-232C communications➊ 900-TC8232 (B)➍
900-TC8 Communications Unit
RS-485 communications 900-TC8COM(B)➍
(Series B)
Event Input Unit Event Input➋ 900-TC8EIM(A)
RS-485 communications with
Communications and 1-Phase Heater Burnout Unit
single-phase heater burnout (open) and 900-TC16NCOM(B)➎➏
and Heater Short
heater short-circuit failure detection➌
Event Input with single-phase heater
Event Input Unit with 1-Phase Heater Burnout and
burnout (open) and heater short-circuit 900-TC16NEIM(B)➎
Heater Short
failure detection➋➌
Event Input Unit Event Input➋ 900-TC16NACEIM(B)➎
Communications Unit RS-485 communications 900-TCNACCOM(B)➎➏
900-TC16
(Series B) RS-485 communications with 3-phase
Communications and 3-Phase Heater Burnout and
heater burnout (open) and heater 900-TC16NCOMP3(B)➎➏
Heater Short Unit
short-circuit failure detection
Communications and Second Voltage (SSR) Output RS-485 communications and a second
900-TC16NCOMV2(B)➎➏
Unit voltage (SSR) output
1-Phase Heater burnout (open) and
1-Phase Heater Burnout and second voltage (SSR) heater short-circuit failure detection
900-TC16P1V2(B)➎
output with a second control voltage (SSR)
output
➊ Enables direct RS-232 connection to personal computer using 900BuilderLite™ software. A Cat. No. 900-CP1X cable or equivalent is
also required.
➋ Provides two event inputs. Allows selecting up to 4 different pre-configured set points, controller Run/Stop or Auto/Manual mode,
from 2 external inputs.
➌ Heater burnout is not available for 0...20 or 4…20 mA analog output style 900-TC16 controllers such as the 900-TC16AC.
➍ To obtain 57.6 k baud rate, Series B communication units must be used with any Series A or Series B 900-TC8 controller catalog
number.
➎ Series B option units must be used with Series B 900-TC16 controllers. Series A option units cannot be used with Series B controllers
and vice versa.
➏ Series B provides 57.6 K baud rate.

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P-x Preface

How to Read Display The following table shows the relationship between the symbols exhibited on
the controller’s front panel displays to alphabet characters.
Symbols
Table P.J 11 — Segment Display Selection

Symbol

A B C D E F G H I J K L M Alphabet

Symbol

Alphabet
N O P Q R S T U V W X Y Z
The Character Select parameter in the Advanced Setting function group can be
turned OFF to display the following 7-segment characters.

Table P.K 7 — Segment Characters

Symbol

A B C D E F G H I J K L M Alphabet

Symbol

Alphabet
N O P Q R S T U V W X Y Z

Publication 900-UM007C-EN-E - January 2011

 Chapter 1

Bulletin 900 Input & Output Overview

I/O Configurations & Main

Functions Figure 1.1 — 900-TC8 I/O Configuration

Temperature Input Control Output

or Analog Input Control Heating Control Ouput 1
Section
Control Output
Cooling Control Ouput 2
Heating/Cooling

Auxillary Output 3 Auxillary Output 3

CT1 Input

Auxillary Output 2 Auxillary Output 2

CT2 Input Auxillary Output 1

HB Alarm
Event Inputs Auxillary Output 1
2 Channels
HS Alarm
Set point input functions
from external digital switches: Overcurrent Alarm
• RUN/STOP
• Program Start
• Auto/Manual Input Error

Simple Program
END Output
QQ303T
Communications
Function

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1-2 Bulletin 900 Input & Output Overview

Figure 1.2 — 900-TC16 I/O Configuration

Temperature Input Control Control Output

Heating Control Ouput 1
or Analog Input Section
Control Output Control Ouput 2
Cooling
Heating/Cooling
CT1 Input

Auxillary Output 2 Auxillary Output 2

CT2 Input

Auxillary Output 1

Event Inputs
2 Channels HB Alarm
Auxillary Output 1

Set point input functions HS Alarm

from external digital switches:
• RUN/STOP Overcurrent Alarm
• Program Start
• Auto/Manual
Input Error

Simple Program
END Output

Communications
Function
QQ303T

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 Bulletin 900 Input & Output Overview 1-3

Figure 1.3 — 900-TC32 I/O Configuration

Temperature Control Control Output Control

Input Section (Heating) Output 1

Control Output
(Cooling) Heating/
Cooling

Auxillary
Standard
Alarm 1 Output 1

Input Error

Program End
Output

Communications
Function

Bulletin 900-TC8, 900-TC16, and 900-TC32 temperature controllers allow the

user to:

• Select from thermocouple and platinum RTD temperature sensors, plus

non-contact temperature sensor and analog voltage or current inputs. ➊
• Individually assign the function for each output by changing the
configured values of the following parameters: Control Output 1,
Assignment, Control Output 2 Assignment➊, Aux 1 Assignment, Aux 2
Assignment ➊, and Aux 3 Assignment (900-TC8).
• Select heating and cooling control in addition to standard control
• Select AT (Auto-Tuning) and ST (Self-Tuning) as tuning functions
• Use multi-SP, switch between automatic and manual operation,
start/reset the simple program function, and initiate the RUN/STOP
function according to event input. ➊
• Use the Heater Burnout Alarm (HBA) and Heater Short Alarm (HSA)
function. ➊
• Use the communications function (for units equipped with the optional
communications function modules)
• Calibrate sensor input
• Configure the color of the PV display to switch between amber, red, and
green, making the process status easy to understand at a glance.
➊ The Bulletin 900-TC32 Temperature Controller does not support this function

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1-4 Bulletin 900 Input & Output Overview

Features

• Watertight construction (equivalent to IP66 indoor use).

• Conform to cULus/IEC safety standards and EMC standards.

Main Functions

The following introduces the main functions of the Bulletin 900-TC8,

900-TC16, and 900-TC32 temperature controllers. For details on each
function and how to use them, refer to Chapter 3 and onward.

• Input Sensor Types — The following input sensors can be connected

for temperature input:
– Thermocouple: K, J, T, E, L, U, N, R, S, B, W, PL11
– Infrared non-contact temperature sensor type: Type K thermocouple
(10…70XC), K (60…120XC), K (115…165XC), K (160…260XC)
– Platinum resistance thermometer: Pt100, JPt100
– Analog millivolt input: 0…50 mV
• High level analog inputs: ➊
– Current input:4…20 mA DC, 0 to 20 mA DC
– Voltage input:1…5V DC, 0…5V DC, 0…10V DC
• Control Output — Control output is either an On/Off
electro-mechanical relay (EMR) ON/OFF triac output (AC only)➊,
On/Off voltage (input to solid-state relay) output, or analog current
(DC: 4...20 mA or 0…20 mA) output ➊, Refer to Table 1.B or 1.D.
• Triac Relay Outputs ➊ — use semiconductors for switching when
closing andopening the AC voltage circuit, thereby eliminating relay
chatter and arcing and improving durability versus an EMR. However, if
high levels of noise or surge are imposed between the output terminals,
short-circuit faults may occasionally occur. If the triac output becomes
permanently shorted, there is the danger of fire due to overheating of
the heater element. To avoid this danger, design safety into the system,
including measures to prevent excessive temperature rise and fire. Take
countermeasures such as installing a surge absorber. As an additional
safety measure, provide error detection in the control loop. Use the
Loop Break Alarm (LBA) and Heater Short Alarm (HSA) that are
provided for Bulletin 900 temperature controllers.
➊ The Bulletin 900-TC32 Temperature Controller does not support this function

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 Bulletin 900 Input & Output Overview 1-5

Figure 1.4 — Triac Diagram

Triac Varistor
Relay Output

1 Inductive
Load
Varistor

Select a surge absorber that satisfies the following conditions.

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1-6 Bulletin 900 Input & Output Overview

Table 1.A — Surge Absorber Selection

Voltage Used Varistor Voltage Surge Resistance

100…120V AC 240…270V
1000 A minimum
200…240V AC 440…470V

• Always connect an AC load to the triac relay output. The output will not
turn OFF if a DC load is connected.
• Alarms — Alarms are supported on the Bulletin 900 temperature
controllers. You can configure the alarm type and alarm value, or Upper
and Lower-Limit alarms.

If necessary, a more comprehensive alarm function can be achieved by

configuring the Standby Sequence, Alarm Hysteresis, Close in
Alarm/Open in Alarm and Alarm Latch ON/OFF parameters.

When the input error output is configured to ON, Alarm Output 1

turns ON when an input error occurs.

• Control Adjustment — Optimum PID constants can be configured

easily by using the AT (Auto-Tuning) and ST (Self-Tuning) parameters.
• Event Input — When the optional event input unit is mounted, the
following functions can be achieved by event input:

Multiple set point selection (multi-SP max. 4 points), RUN/STOP

mode change switching between automatic and manual operation, and
starting/stopping the simple program. Refer to Table 1.C and 1.E.

• HBA and HS Alarms — The Heater Burnout Alarm (HBA) and

Heater Short Alarm (HSA) and heater overcurrent function is
supported by selecting the appropriate controller (900-TC8) or option
module (900-TC16). Refer to Table 1.B for the TC8 and Table 1.E for
the TC16.
• Communications Function — Personal computer (PC)
communicationsare supported when the option communications unit is
mounted on the temperature controller. Refer to Table 1.C and 1.E.

Note: The PC must have 900BuilderLite software installed.

Note: 900-TC protocol is an integrated general-purpose serial

communications protocol.

Note: Modbus is a communications control method conforming to the RTU.

Mode of Modicon Inc.'s Modbus Protocol.

Note: The 900-TC16 and 900-TC32 do not support the RS-232C interface.

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 Bulletin 900 Input & Output Overview 1-7

Controller Hardware The following tables provide a list of controller base features with associated
Cat. Nos.
Versions

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1-8 Bulletin 900 Input & Output Overview

900-TC8

Table 1.B — Controller Versions

Power Control Control Supports Cat. No. for

DIN Size No. of Sensor Input Supply Output 1 Output 2 Heater Burnout Enhanced
(mm) Alarms Type Voltage Type Type Alarm 900-TC8 Line
Relay On/Off NA Yes (1-Phase) 900-TC8RGTH1Z25
NA No 900-TC8RGTZ25
Volt On/Off No 900-TC8RVGTZ25
(SSR)
NA Yes (3-Phase) 900-TC8RGTH3Z25
Volts On/Off NA Yes (1-Phase) 900-TC8VGTH1Z25
(SSR)
NA No 900-TC8VGTZ25
100…240V Triac On/Off No 900-TC8VYGTZ25
AC (3 A)
Volt On/Off No 900-TC8VVGTZ25
(SSR)
Thermocouple
or RTD NA Yes (3-Phase) 900-TC8VGTH3Z25
Analog NA No 900-TC8ACGTZ25
Triac On/Off No 900-TC8ACYGTZ25
1/8th DIN (3 A)
3
(48 x 96 x 78)
Volt On/Off No 900-TC8ACVGTZ25
(SSR)
Relay On/Off NA Yes (1-Phase) 900-TC8RGTH1U25
NA No 900-TC8RGTU25
24V AC/DC Volts On/Off NA Yes (1-Phase) 900-TC8VGTH1U25
(SSR)
NA No 900-TC8VGTU25
Analog NA No 900-TC8ACGTU25
Relay On/Off NA Yes (1-Phase) 900-TC8RABH1Z25
NA No 900-TC8RABZ25

Analog Volts On/Off NA Yes (1-Phase) 900-TC8VABH1Z25

100… (SSR)
Current and NA No 900-TC8VABZ25
240V AC
Voltage
Triac On/Off No 900-TC8VYABZ25
(3 A)
Analog NA No 900-TC8ACABZ25

Note: To implement the HBA and HSA function, a current transformer (Cat.
No. 900-CT1 or 900-CT2) is required. A current transformer is NOT
provided with the controller.

Note: When the heating and cooling function or the HBA or HSA is used,
one of the alarm outputs will be disabled for each function used.

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 Bulletin 900 Input & Output Overview 1-9

Table 1.C — Controller Option Units

Event Out Comms Cat. No. for Enhanced Option Units Series
— RS232 900-TC8232B B
Option Unit — RS485 900-TC8COMB B
Yes — 900-TC8EIMA A

900-TC16

Table 1.D — Controller Versions

DIN Size Number of Sensor Input Power Supply Control Output Cat. No for Enhanced
(in mm) Alarms Type Voltage Type 900-TC16 Line
100…240V AC Relay On/Off 900-TC16RGTZ25
Triac On/Off (3 A) 900-TC16YGTZ25
Volts On/Off (SSR) 900-TC16VGTZ25
Thermocouple or Analog Current 900-TC16ACGTZ25
RTD
24V AC/DC Relay On/Off 900-TC16RGTU25
Volts On/Off (SSR) 900-TC16VGTU25

1/16th DIN Analog Current 900-TC16ACGTU25

2
100…240V AC Relay On/Off 900-TC16RABZ25
Triac On/Off (3 A) 900-TC16YABZ25
Volts On/Off (SSR) 900-TC16VABZ25
Analog Current and
Voltage Analog Current 900-TC16ACABZ25
24V AC/DC Relay On/Off 900-TC16RABU25
Volts On/Off (SSR) 900-TC16VABU25
Analog Current 900-TC16ACABU25

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1-10 Bulletin 900 Input & Output Overview

Table 1.E — Controller Option Units

Heater Voltage (SSR) Cat. No. for Enhanced

Burnout Event Out Comms Control Output 2 Option Units Series
1-Phase HB — RS485 — 900-TC16NCOM B
— — RS485 — 900-TC16NACCOM
1-Phase HB Yes — — 900-TC16NEIM
— Yes — — 900-TC16NACEIM
3-Phase HB — RS485 — 900-TC16NCOMP3
— — RS485 Yes 900-TC16NCOMV2
1-Phase HB — — Yes 900-TC16P1V2
➊ Series B option units must be used with Series B controllers. DO NOT use series B option units
with Series A controllers.

900-TC32

Table 1.F — Controller Versions

DIN Size Number of Sensor Input Power Supply Control Output Comm Function Cat. No for Enhanced
(in mm) Alarms Type Voltage Type (RS-445) 900-TC32 Line
100…240V AC Relay On/Off Yes 900-TC32CRGTZ25
Volts On/Off (SSR) Yes 900-TC32CVGTZ25
Relay On/Off No 900-TC32RGTZ25

1/16th DIN Thermocouple Volts On/Off (SSR) No 900-TC32CVGTZ25

1 or RTD 24V AC/DC Relay On/Off Yes 900-TC32CRGTZ25
Volts On/Off (SSR) Yes 900-TC32CVGTZ25
Relay On/Off No 900-TC32RGTZ25
Volts On/Off (SSR) No 900-TC32CVGTZ25

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 Bulletin 900 Input & Output Overview 1-11

Front Panels & General Figure 1.5 — Bulletin 900-TC8

Functions

Operation Indicators
SUB1 SUB2
HA SUB3

PV
Temperature Unit
No.1 Display

SV
No.2 Display

OUT1 STOP MV
Operation Indicators OUT2 CMW MANU
No.3 Display

Up Key
Mode Key

PF Function Key/
A/M
Function Group Key Auto/Manual Key

Down Key

Figure 1.6 — Bulletin 900-TC16

Temperature Unit

No. 1 Display
Operation Indicators

No. 2 Display

Up Key
Function Group Key

Mode Key Down Key

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1-12 Bulletin 900 Input & Output Overview

Figure 1.7 — Bulletin 900-TC32

Display Meanings

SUB1 SUB2
HA SUB3
Display Meaning
No. 1 Displays the Process Value or Parameter Type during configuration. Lights for
approximately 1 second during startup.
No. 2 Displays the Set Point, parameter operation read value, manipulated variable,
or during configuration, the value of the displayed (No. 1 display) parameter.
OUT1 STOP
OUT2 CMW MANU
No. 3 Displays MV, soak time remaining, or multi SP. Lights for approximately 1
(900-TC8 only) second during startup. A 2-level display is configured when shipped from the
factory. A 3-level display is activated if parameters are initialized.

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 Bulletin 900 Input & Output Overview 1-13

Operation Indicators 1,2,3...

Operation
Indicator Definition Function
SUB 1 Sub 1 Lights when the function configured for the Auxiliary Output 1 Assignment parameter
is ON.
SUB2 Sub 2 900-TC8 and 900-TC16 Only:
Lights when the function configured for the Auxiliary Output 2 Assignment parameter
is ON.
SUB3 Sub 3 900-TC8 Only:
Lights when the function is configured for the Auxiliary Output 3 Assignment
parameter is ON.
HA Heater Burnout, Heater Short Alarm, Heater 900-TC8 and 900-TC16 Only:
Overcurrent Detection Output Display Lights when a heater burnout, heater short alarm, or heater overcurrent occurs.
OUT1 Control Output 1 Lights when the control output function assigned to control output 1 turns ON. For a
current output, however, OFF for a 0% output only.
OUT2 Control Output 2 900-TC8 and 900-TC16 Only:
Lights when the control output function assigned to control output 2 turns ON. For a
current output, however, OFF for a 0% output only.
STOP Operation Stopped Lights when operation is stopped. During operation, this indicator lights when
operation is stopped by an event or by key input using the RUN/STOP function.
CMW Communications Writing Lights when communications writing is enabled and is not lit when it is disabled.
MANU Manual Mode Lights when the auto/manual mode is configured to manual mode.
Key Lights when setting change protect is ON (i.e., when the up and down Keys are
disabled by protected status.
c or f Temperature Unit The temperature unit is displayed when the display unit parameter is configured to a
temperature. Indication is determined by the currently selected Temperature Unit
parameter value. When the parameter value is configured for °C, c is displayed, and
when configured for °F, f is displayed. The display flashes during self-tuning (ST)
operation.

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Basic Keypad Functions

The following describes the basic functions of the front panel keys.

Key Definition Function

Function (Auto/Manual) 900-TC8 Only:
PF This is a function key. When it is pressed for at least 1 second, the function configured in the PF
A/M
Setting parameter will operate. Example: When A-M (auto/manual) is selected in the PF Setting
parameter (initial value: A-M), the key operates as an auto/manual switch, switching between
Auto Mode and Manual Mode. If the key is pressed for more than 1 second (regardless of key
release timing), the mode will switch.
Function Group Select Press this key to select the desired function group. The groups are selected in the following order:
Operation function group ←→ Adjustment function group, Initial Setting function group ←→
Communications Setting function group.
Mode Select Press this key to select the various parameters within each function group. The selection of
parameters can be reversed by holding this key down.

Up Each press of this key increments values displayed on the No. 2 (SV) display. Holding down this
key continuously increments values.

Down Each press of this key decrements values displayed on the No. 2 (SV) display. Holding down this
key continuously decrements values.

Key Combination — This key combination settings the Bulletin 900 to the Protect function group. For details on the
+
Function Group and Mode Select Protect function group, refer to Chapter 5 , Parameter Functions & Definitions.

+ Key Combination — To restrict changing parameter values and to prevent accidental or incorrect operations, these
Function Group and Up or keys require simultaneously pressing of the key along with the or key.
or The key applies only to the parameter configured for the Password to Move to Protect
+ Function Group and Down
function group . Refer to Chapter 5 for more detailed information on this function group.

Publication 900-UM007D-EN-E - January 2011

 Chapter 2

Preparations

Hardware Installation Approximate Dimensions

The recommended panel thickness for mounting the 900-TC16 and 900-TC32
is 1 to 5 mm and the 900-TC8 is 1 to 8 mm.

Note: Dimensions are in millimeters. Dimensions are not intended to be used

for manufacturing purposes.To convert millimeters to inches, multiply
by 0.0394.

Figure 2.1 — 900-TC8

6.0 79.2

Allen-Bradley 900-TC8

112

20

Front View Side View Back View

Figure 2.2 — 900-TC16

48 × 48

Allen-Br
Allen-Bradley 900-TC16
44.8 × 44.8

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2-2 Preparations

Figure 2.3 — 900-TC32

48 99 44.8

7 8 9 10 11 12
35
24 22
1 2 3 4 5 6

Panel Cutout Dimensions

Dimensions are in millimeters. Dimensions are not intended to be used for

manufacturing purposes.

Figure 2.4 — 900-TC8

60 min. (48 x number of units -2.5)

92
120 min.

➊
45
92

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 Preparations 2-3

Figure 2.5 — 900-TC16

60 min. (48 x number of units -2.5)

45

60
min. 45

45

Figure 2.6 — 900-TC32

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• Horizontal group-mounting of two or more temperature controllers, or

mounting temperature controllers above each other may cause heat to
build up inside the temperature controllers. This will shorten their
service life. When mounting temperature controllers like this, consider
forced cooling measures, such as a cooling fan.

• If forced air cooling is used, limit cooling to the terminal block. Rapid
variation or transients in temperature at the terminal block may result in
a measurement error.

System Wiring and Installation Guidelines

Risk of Electrical Shock

ATTENTION

!
• Devices are Open Type, Listed Process Control
Equipment and must be mounted in an enclosure.

• More than one disconnect switch may be required to

de-energize the equipment before servicing.

• Signal inputs are SELV, limited energy.

• To reduce risk of fire or electrical shock, do not

interconnect the outputs of different Class 2 circuits.

• Disconnect all power (including field device) before

installing and/or servicing.

• Do not touch the controller’s wiring terminals while

the power is ON. Doing so may cause an electric
shock.

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 Preparations 2-5

• Do not allow metal fragments or lead wire scraps to

ATTENTION
fall inside the Bulletin 900 Controller. These may cause

!
electric shock, fire, or malfunction.

• Never disassemble, repair, or modify the Bulletin 900

Controller with line or field device power applied.
Doing so may cause electric shock, fire, or
malfunction.

• Do not use the Bulletin 900 Controller in flammable

and explosive gas atmospheres.

• Use the Bulletin 900 Controller within the rated supply

voltage. Not doing so may cause controller damage or
fire.

• Configure all controller settings according to the

control target of the Bulletin 900 Controller. If the
settings are not appropriate for the control target, the
controller may operate in an unexpected manner,
resulting in damage to the product or personal injury.

• To maintain safety in the event of a product

malfunction, always take appropriate safety measures,
such as installing an alarm on a separate line to prevent
excessive temperature rise. If a malfunction prevents
proper control, an accident may result.

• Do not wire unused terminals.

• Make sure to observe correct polarity when wiring the

controller terminals.

• Power supply, input, output, and communication

terminals (for models with communications) have
basic insulation between them.
When double insulation is required, apply
supplemental insulation defined in IEC 60664 that is
suitable for the maximum operating voltage with
clearances or solid insulation.

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• Do not use the Bulletin 900 Controller in the following

ATTENTION
places which might exceed its specifications:

! – Places subject to dust or corrosive gases (in

particular, sulfide gas, and ammonia gas)
– Places subject to high humidity, condensation, or
freezing
– Places subject to direct sunlight
– Places subject to vibration and large shocks
– Places subject to splashing liquid or oily atmosphere
– Places directly subject to heat radiated from heating
equipment
– Places subject to intense temperature changes

• To allow heat to escape, do not block the area around

the Bulletin 900 Controller. Ensure that enough space
is left for the heat to escape. Do not block the
ventilation holes on the casing.

• Cleaning: Do not use paint thinner or the equivalent.

Use standard grade alcohol to clean the Bulletin 900
Controller.

• Use within the following temperature and humidity

ranges:

Temperature: –10…+55 °C
Humidity: 25…85% (with no icing or condensation)

If the Bulletin 900 Controller is installed inside a

control panel, the ambient temperature must be kept to
under 55 °C, including the temperature around the
controller.

If the Bulletin 900 Controller is subjected to heat

radiation, use a fan to cool the surface of the controller
to under 55 °C.

• Never place heavy objects on, or apply pressure to the

Bulletin 900 Controller as it may cause it to deform and
deteriorate during use or storage.

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 Preparations 2-7

• Store within the following temperature and humidity

ATTENTION
ranges:

! Temperature: –25…+65 °C
Humidity: 25…85% (with no icing or condensation)

• Avoid using the Bulletin 900 Controller in places near a

radio, television configured, or wireless installation.
These devices can cause radio disturbances which may
adversely affect the performance of the Bulletin 900
Controller.

Panel Mounting — 900-TC8

How to Attach the Bulletin 900-TC8 on the Panel

Figure 2.7 — 900-TC8

Upper Panel
Mounting
Adaptor
Gasket material for
NEMA 4X (waterproof)
material

Lower Panel
Mounting
Adaptor

Control
Panel

1. If water-proofing is required, ensure the gasket material is inserted

between the front of the controller’s case and the control panel.

2. Insert the Bulletin 900-TC8 into the mounting hole in the panel
(1…8 mm panel thickness).

3. Pull the upper and lower panel mounting adapters along the
Bulletin 900-TC8 body from the rear of the case up to the panel, and
fasten temporarily.

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4. Tighten the upper and lower adapter mounting screws alternately with
only one turn of the screwdriver at a time to maintain an even torque
balance. Tighten the screw until the ratchet mechanism operates.

5. To allow heat to escape, do not block the area around the

Bulletin 900-TC8 Temperature Controller. (Ensure that enough space is
left for the heat to escape.) Do not block the ventilation holes on the
casing.

6. Allow as much space as possible between the Bulletin 900-TC8 and

devices that generate powerful high-frequency noise (e.g.,
high-frequency welders, high-frequency sewing machines) or surges.

7. Install the controller so that it is horizontal (can read the display

properly).

Note: When group mounting two or more Bulletin 900-TC8s, make sure that
the surrounding temperature does not exceed the allowable operating
temperature given in the specifications.

Mounting the Terminal Cover

To attach the terminal cover to the terminal block, slightly bend the terminal
cover, as shown below. The terminal cover cannot be attached in the opposite
direction.

Figure 2.8 — 900-TC8 Mounting the Terminal Cover

Enlarged Illustration of Terminal Section

Slightly bend the

terminal cover
in the direction shown
by the arrows.

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 Preparations 2-9

900-TC8 (Series B) Case Removal while Panel-Mounted

The control unit can be removed from its case whether or not it is mounted on
the control panel. This allows you to perform maintenance or to add option
units without opening the control panel enclosure or removing the terminal
compartment.

Figure 2.9 — 900-TC8 (Series B) Case Removal while Panel-Mounted

Tool Insertion Top View
Holes

Rear
Case

(1) Front
Panel

Gap
(2)

(3) Flat-blade Screwdriver

(Unit: mm)

0.4 5.0
2.0
(1)

IMPORTANT Ensure controller and I/O power is OFF before removing

the internal mechanism. When you remove the internal
mechanism from the housing, never touch electric
components inside or subject the internal mechanism to
shock.

1. Insert a flat-blade screwdriver into the two tool insertion holes (one on
the top and one on the bottom) to release the hooks.

2. Insert the flat-blade screwdriver in the gap between the front panel and
the rear case (two on the top and two on the bottom), and use it to pry
and pullout the front panel slightly. Then, pull out on the front panel
gripping both sides. Be sure not to impose excessive force on the panel.

Setting Up the 900-TC8 Controller with the Optional Units

If RS-232, RS-485 communications inputs are required, mount the RS-232

communications unit (Cat. No. 900-TC8232), the RS-485 communications
unit (Cat. No. 900-TC8COM), or the event input unit (Cat. No.
900-TC16EIM) in the Bulletin 900-TC8 controller. These units provide optical
isolation (approx. 32V DC) between the controller electronics and field input.

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Table 2.A

Name Cat. No. Function

(Series)➊
Communications board 900-TC8COM (B) RS-485 Communications support
900-TC8232 (B) RS-232 Communications support
Event input unit 900-TC8EIM (A) Event input support

➊ One (1) unit per controller. This series of option units are compatible with Series A or Series B controllers.

Panel Mounting — 900-TC16

How to Attach the Bulletin 900-TC16 on the Panel

To prevent electrostatic damage to the board, make sure you are properly
grounded before installing it. Follow the steps below.

Figure 2.10
(1)
Location for Boards:
900-TC8EIM: Event Input
900-TC8232: RS-232
(2) (3) 900-TC8COM: RS-485

1. Insert the controller through the hole in the panel from the front, and
push the panel mounting adapter on from the rear. Push the adapter up
to the back of the panel ensuring that the controller is pushed all the way
in, removing any gap between the controller, panel, and adapter. Finally,
use the two screws on the adapter to secure the unit in place. The
recommended panel thickness is 1…5 mm.

2. To mount the Bulletin 900-TC16 so that it is waterproof, insert the

waterproof packing on the Bulletin 900-TC16. The Bulletin 900-TC16
cannot be waterproofed when it is group-mounted in the horizontal
fashion.

3. Maintain the specified mounting space between each controller.

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 Preparations 2-11

4. Tighten the two screws on the adapter against the panel. Tighten the
two screws alternately keeping the torque to approximately
0.29…0.39 N•m (2.57…3.45 lb-in.).

5. To allow heat to escape, do not block the area around the

Bulletin 900-TC16 Temperature Controller. (Ensure that enough space
is left for the heat to escape.) Do not block the ventilation holes on the
casing.

6. Allow as much space as possible between the Bulletin 900-TC16 and

devices that generate powerful high-frequency noise (e.g.,
high-frequency welders, high-frequency sewing machines) or surges.

7. Install the controller so that it is horizontal (can read the display

properly).

How to Attach the 900-TC16 Wiring Terminal Block Cover

Figure 2.11

Panel

Safety Terminal
Block Cover

Rear Case
Terminal Block

Panel Mounting
Adaptor

Front Case

Make sure that the UP mark on the adapter is facing up, and then fit the
terminal cover into the holes on the top and bottom. The Bulletin 900-TC16 is
provided with a protective terminal block cover (finger protection per
VDE 0106).

Setting Up the 900-TC16 Controller with the Optional Units

If RS-485 communications, Event Input, second Control Output, or Heater
Burnout functions are required, mount the appropriate option unit in the
Bulletin 900-TC16 controller.
900-TC16 Option Units
Table 2.B below provides the list of available options.

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Table 2.B

Function 900-TC16 Option

Module Cat.
Heater Burnout Event Voltage (SSR) No.(Series)
Comms.
& Heater Short Input Control Output 2 ➊➋
1-Phase HB — RS485 — 900-TC16NCOM (B)
— — RS485 — 900-TC16NACCOM (B)
1-Phase HB Yes — — 900-TC16NEIM (B)
— Yes — — 900-TC16NACEIM (B)
3-Phase HB — RS485 — 900-TC16NCOMP3 (B)
— — RS485 Yes 900-TC16NCOMV2 (B)
1-Phase HB — — Yes 900-TC16P1V2 (B)

➊ One (1) option unit per controller.

➋ The option unit provides optical isolation (approximately 32V DC) between the controller electronics and the
field input. Series B option units must be used with Series B controllers and vice versa.

Installing the Option Unit/Board in the Controller

Figure 2.12
(1)
(4)

(2)

Flat-blade Screwdriver
Units: mm
(1)

20 min.

(3)

Note: When you remove the internal mechanism from the housing, never
touch electric components inside or subject the internal mechanism to
shock.

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Panel Mounting — 900-TC32

Mounting to the Panel

Figure 2.13

Note: For waterproof mounting, waterproof packing must be installed on the

controller. Waterproofing is not possible when group mounting several
controllers. Waterproof packing is not necessary when there is no need
for the waterproofing function.

1. For waterproof mounting: Install waterproof packing on the

controller.

2. Insert the 900-TC32 into the mounting hole in the panel.

3. Push the adapter from the terminals up to the panel, and temporarily
fasten the 900-TC32

4. Tighten the two fastening screws on the adapter. Alternately tighten the
two screws little by little to maintain a balance. Tighten the screws to a
torque of 0.29 to 0.39 N·m.

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The body of the controller can be replaced by removing the terminal block
from the 900-TC32.

Figure 2.14

1. Insert a flat-blade screwdriver into the tool holes (one on the top and
one on the bottom) to release the hooks. Do not apply excessive force.

2. Pull the terminal block out while the hooks are released.

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 Preparations 2-15

Bulletin 900 Wiring

Terminals Figure 2.15 — 900-TC8 (Series B) Terminal Arrangement

Option Units
Communications
• 100 to 240 VAC 900-TC8232 900-TC8COM 900-TC8EIM
• 24 VAC/VDC (no polarity)
RS-232C RS-485 Event inputs
11 SD 11 B (+) 11
Control output 1 EV2
Relay output Event Inputs 12 RD 12 12 EV
250 VAC, 5A 1 11 13 SG 13 DO NOT USE 13 CT1/CT2
(resistive load) Input power supply
EV2
Voltage output 2 12
EV1
(for driving SSR)
12 VDC, 40 mA 3 13
Current output Control output 1 CT1/CT2 Control Output 2
0 to 20 mA DC 4 14 +
4 to 20 mA DC CT1
Load: 600 Ω max. Control output 2
5 15 -
Auxiliary output 3 CT2
DO NOT
Control output 2 6 16 USE
Voltage output DO NOT
(for driving SSR) 7 17 USE
12 VDC, 21 mA Auxiliary output 2
Triac output 8 DO NOT A DO NOT
18
250 VAC, 3 A USE USE
(resistive load) mA
B
9 19
Auxiliary output 1 V DO NOT
10 B A heater burnout alarm, heater short alarm,
20 USE
Auxiliary output heater overcurrent alarm, or input alarm is
1, 2, 3 TC/Pt universal input Analog input sent to the output to which the alarm 1
Relay outputs function is assigned.
250 VAC, 3 A
(resistive load)

Figure 2.16 — 900-TC16 Terminal Arrangement

Relay output + Auxiliary output (Relay output)

1 11 6
250V AC, 3 A Auxiliary output (Relay
Control output 1
(Resistive load) Auxiliary output 2 output), 250V AC, 1 A
2 12 7
− Auxiliary output 1, HBA/HS
(Resistive load)
Voltage output alarm/input error
+ A
12V DC, 21 mA 3 13 8
mA
Current output − B
− 4 14 9
4 to 20 mA DC
0 to 20 mA DC V B
Input power supply
Load 600 Ω max. 5 15 10
+ + 100 to 240V AC
Analog input TC/Pt 24V AC/DC (no polarity)
Multi-input

+ + +
11 B 11 11 B 11 B 11 B 11 11 Voltage output
RS-485 RS-485 RS-485 RS-485 Control Output 2 12V DC, 21 mA
12 A 12 12 A 12 A 12 A 12 12
EV1 − EV1 − −
Do not Do not Do not Do not
EV2
13 connect. 13 13 connect. 13 13 connect. 13 connect. 13
EV2
CT2
14 14 14 14 14 + 14 14
CT1 CT1 CT1 Control Output 2 CT1
15 15 15 15 15 15 15

900-TC16NACEIM 900-TC16NCOM 900-TC16NEIM 900-TC16NACCOM 900-TC16NCOMP3 900-TC16NCOMV2 900-TC16PIV2

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Figure 2.17 — 900-TC32 Terminal Arrangement

Control Output 1

Relay Output 250 VAC, 2 A RS-495 A B B

(resistive load) Communications B(+) A(-) Universal
DO NOT DO NOT TC/Pt Input
Voltage Output USE USE - +
12 VDC, 21 mA 7 8 9 10 11 12
(for driving SSR)
1 2 3 4 5 6
Auxillary Output 1 Input Control Auxillary
Power Output 1 Output 1
Relay Output 250 VAC, 2 A Supply
(resistive load)

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Wiring Guidelines and Precautions

• Do not wire unused terminals.

ATTENTION
• Make sure to observe correct polarity when wiring the

!
controller terminals.
• To reduce induction noise, separate the high-voltage or
large-current power lines from other lines, and avoid
parallel or common wiring with the power lines when
you are wiring to the terminals. We recommend using
separating pipes, ducts, or shielded lines.
• Allow as much space as possible between the
Bulletin 900 Controller and devices that generate
powerful high-frequency noise (e.g., high-frequency
welders, high-frequency sewing machines) or surges.

• Separate input leads and power lines in order to protect the

Bulletin 900-TC8, 900-TC16, 900-TC32, and its low voltage sensors
(e.g., thermocouple) lines from external noise.

• For 900-TC32: Use a shielded AWG24 to AWG18 (cross-sectional area

of 0.205 to 0.823 mm2) twisted-pair cable. The stripping length is
6 to 8 mm.

• We recommend using solderless lugs when wiring to the

Bulletin 900-TC8 and 900-TC16 screw terminals. However, if lugs are
not used, the controller’s screw terminals will accept two solid or
stranded wires (no mixing) between 24 (0.205 mm2)...14 (2.081
mm2)AWG. Wire strip length 5...6 mm.

• For 900-TC8 & 900-TC16: Tighten the terminal screws properly.

Tighten them to a torque 0.74…0.9 N•m (6.6…8 lb-in.) Loose screws
may cause malfunction. For 900-TC32: Tighten the terminal screws to a
torque of 0.5 N•m

• Use the type of solderless lugs referenced in Figure 2.18 for your proper
Bulletin type.

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Figure 2.18 — Wiring

7.2 mm max.

7.2 mm max.

Wiring

Power Supply

The controller requires an external power source for operation. For the
900-TC8 connect to terminals 1 and 2 and for the 900-TC16 connect to
terminals 9 and 10. The following table shows the specifications.

Table 2.C

Input Power Supply Bulletin 900-TC8 Bulletin 900-TC16

100…240V AC, 50/60 Hz 10VA 7.5VA
24V AC, 50/60 Hz 5.5VA 5VA
24V DC (not polarity sensitive) 4W 3W

Use a power supply matched to the power specifications of

ATTENTION
the Bulletin 900 Controller. Also, make sure that rated

!
voltage is attained within 2 seconds of turning the power
ON.

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When mounting a noise filter on the power supply, make sure to first check the
filter’s voltage and current capacity, and then mount the filter as close as
possible to the Bulletin 900 Controller. Reinforced insulation is applied to the
power supply I/O sections.

Wiring Input/Sensor Devices

Connect sensors to the terminals as follows according to the Input Type and
controller.

+
3 3 3
− − mA
4 4 4
V −
5 5 5 +
+
Platinum resistance
Thermocouple thermometer Analog input

900-TC16 Input Sensor Wiring

+
18 18 18
mA
19 − 19 19 −
V −
20 20 20
+ +
Platinum resistance
Thermocouple thermometer Analog input

900-TC8 Input Sensor Wiring

Input/Sensor Wiring Considerations

• When the thermocouple leads are extended, make sure to use shielded
thermocouple extension wire matched to the type of thermocouple.

• For a thermocouple, make sure to follow the polarity color code convention.

• If there is a large error in the measurement values, make sure that the correct
sensor type is configured and for thermocouples that input compensation has
been properly configured.

• RTDs can be either 2- or 3-wire types. If a 3-wire type is used, the controller
provides lead wire resistance compensation up to 5 Ω resistance. If using 24
AWG lead wire, this is approximately 59 m of wire. Use larger gauge wire if
longer length is required.

• For RTDs, the controller source is approximately 1 mA of current.

• If a cooling fan is used in the panel enclosure, prevent only the terminal
block from being cooled when using thermocouples. Otherwise, this may
result in a measurement error.

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• To reduce induced electrical noise, the leads on the temperature controller’s

terminal block must be wired separately from large-voltage/large-current
power leads. Also, avoid wiring leads in parallel with power leads or in the
same wiring path. Other methods such as separating conduits and wiring
ducts, or using shield wire are also effective and recommended.

Wiring Control Output 1

The following diagrams show the available outputs and their internal
equalizing circuits.

Figure 2.19

+v +v
+ +
L L
GND
− −
Relay Voltage (SSR) Analog Current
900-TC8 Control Output 1

+V +V
+
1 1 +
− +
L 1
L
2 GND 2 2
− −
Relay Voltage (SSR) Analog Current
900-TC16 Control Output 1

+v
+
L

900-TC32 Control Output 1

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The following tables show the specifications for each output type.

Table 2.D — 900-TC8

Output Type Output 1 Specifications

Relay 250V AC, 5 A (resistive load), electrical durability: 100,000
operations
Voltage (PNP) PNP type, 12V DC +15%/−20%, 40 mA (with short-circuit
protection). Series B 12V DC ± 15%.
Current DC 4… 20 mA/DC 0…20 mA, resistive load: 600 Ω max.
Resolution: Approx.10,000

Table 2.E — 900-TC16

Output Type Output 1 Specifications

Relay 250V AC, 3 A (resistive load), electrical durability: 100,000
operations
Triac (AC) relay 250V AC, 3 A (resistive load), electrical durability: 1,000,000
operations
Voltage (PNP) PNP type, 12V DC ±15%, 21 mA (with short-circuit protection)
Current DC 4…20 mA/DC 0…20 mA, resistive load: 600 Ω max.
Resolution: Approx. 10,000

Table 2.F — 900-TC32

Output Type Output 1 Specifications

Relay 250V AC, 2 A (resistive load), electrical durability: 100,000
operations
Voltage (PNP) PNP type, 12V DC ±15%, 21 mA (with short-circuit protection)

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Output Wiring Considerations

• Do NOT connect a DC load to the Triac (AC) relay.

• The PNP voltage (SSR) output (Control Output 1) is not electrically

isolated from the controller’s internal circuits. SSR Control Output 2 of
the 900-TC16 is also not isolated. However, SSR Control Output 2 of
the 900-TC8 is isolated. When using a grounded thermocouple, do not
connect any control output terminals to earth ground. If the control
output terminals are connected to earth ground, errors will occur in the
measured temperature values as a result of ground loop leakage current.

• For 900-TC8 & 900-TC16: The 4...20 and 0…20 mA analog output is
electrically isolated from the other controller circuits as follows:

– Analog Output to Sensor Input: 500V AC 50/60 Hz for 1 minute

– Analog Output to Alarm Output: 2000V AC 50/60 Hz for 1 minute
– Analog Output to Input Power Supply: 2000V AC 50/60 Hz for 1
minute

• The life expectancy of the electro-mechanical relay outputs vary greatly

with the switching capacity and other switching conditions. Always use
the output relays within their rated load and electrical life expectancy. If
an output relay is used beyond its life expectancy, its contacts may
become fused or burned.

• Use the Bulletin 900 Controller within the rated load. Not doing so may
cause damage or fire.

• Attach a surge suppressor or noise filter to peripheral devices that

generate noise (in particular, motors, transformers, solenoids, magnetic
coils, or other equipment that have an inductance component).

• About 4 seconds are required for control and/or alarm outputs to turn
ON when the power is initially turned ON to the controller. Take this
into consideration when the temperature controller is incorporated into
a sequence circuit.

• For 900-TC8 & 900-TC16: Triac (AC) relay outputs use

semiconductors for switching when closing and opening the circuit,
thereby eliminating relay chatter and arcing and improving durability
compared to an electro-mechanical relay output. However, if high levels
of electrical noise or surge are imposed between the output terminals,
short-circuit faults may occasionally occur. If the output becomes
permanently shorted, there is the danger of fire due to overheating of
the heater. Design safety into the system, including measures to prevent
excessive temperature rise and fire. Take countermeasures such as
installing a surge absorber. As an additional safety measure, provide
error detection in the control loop. (Use the Loop Burnout Alarm

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(LBA) and Heater Short Alarm (HSA) that are provided for the Bulletin
900 Controller.)
Figure 2.20
Triac (AC) Varistor
relay output
Inductive
1 load

Varistor
2

Select a surge absorber that satisfies the following conditions.

Table 2.G

Voltage Used Varistor Voltage Surge Resistance

100…120V AC 240…270V 1,000 A min.
200…240V AC 440…470V

Control Output 2

• For 900-TC8 & 900-TC16: Output 2 is applied from terminals 11 and

12 or 14 and 15 with the 900-TC16, and from pins 14 and 15 with the
900-TC8. The following diagrams show the available outputs and their
equal internal circuits.
Figure 2.21
+v +v +v

L or L L
GND GND GND

Voltage ➊ Voltage ➋ Relay Voltage

900-TC16 Control Output 2 900-TC8 Control Output 2

➊ Option Unit: 900-TC16P1V2

➋ Option Unit: 900-TC16NCOMV2
The following table shows the specifications for each output type.
Table 2.H — 900-TC8

Output Type Output 2 Specifications

Triac (AC) relay 250V AC, 3 A (resistive load), electrical durability: 1,000,000
operations
Voltage (PNP) PNP type, 12V DC +15%/−20%, 21 mA (with short-circuit
protection)

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2-24 Preparations

Table 2.I — 900-TC16

Output Type Output 2 Specifications

Voltage (PNP) PNP type, 12V DC ±15%, 21 mA (with short-circuit protection)

• Always connect an AC load to a Triac (AC) relay output. The output will
not turn OFF if a DC load is connected.
• A voltage output (control output) is not electrically isolated from the
internal circuits. Therefore, when using a grounded thermocouple, do
not connect any of the control output terminals to earth ground. If
control output terminals are connected to ground, errors will occur in
the measured temperature values as a result of ground loop leakage
current. With 900-TC8, however, voltage output (Control Output 2) is
functionally isolated from the internal circuits.
• Control Output 2 of the 900-TC16 is a voltage output (SSR driver) only,
and outputs across terminals 11(+) and 12(-), or 14(+) and 15(-).
• Control outputs 1 and 2 (voltage outputs) are not isolated.
• Triac (AC) relay outputs use semiconductors for switching when closing
and opening the circuit, thereby eliminating relay chatter and arcing and
improving durability compared to an electro-mechanical relay output.
However, if high levels of electrical noise or surge are imposed between
the output terminals, short-circuit faults may occasionally occur. If the
output becomes permanently shorted, there is the danger of fire due to
overheating of the heater. Design safety into the system, including
measures to prevent excessive temperature rise and fire. Take
countermeasures such as installing a surge absorber. As an additional
safety measure, provide error detection in the control loop. (Use the
Loop Burnout Alarm (LBA) and Heater Short Alarm (HSA) that are
provided for the Bulletin 900.)
Figure 2.22
Triac (AC) Varistor
relay output
Inductive
1 load

Varistor
2

Publication 900-UM007D-EN-E - January 2011

 Preparations 2-25

Select a surge absorber that satisfies the following conditions.

Table 2.J

Voltage Used Varistor Voltage Surge Resistance

100…120V AC 240…270V 1,000 A min.
200…240V AC 440…470V

Wiring Auxiliary Outputs (1, 2, and 3)

• On the 900-TC8, Auxiliary Output 1 (SUB1) is output across terminals

9 and 10, Auxiliary Output 2 (SUB2) is output across terminals 7 and 8,
and Auxiliary Output 3 (SUB3) is output across terminals 5 and 6.
• When the HBA or the HS Auxiliary is used with the 900-TC8,
Auxiliaries are output across terminals 9 and 10.
• On the 900-TC8, when heating/cooling control is used, Auxiliary
Output 3 becomes control output (cooling).
• On the 900-TC16, Auxiliary Output 1 (SUB1) is output across terminals
7 and 8, and Auxiliary Output 2 (SUB2) is output across terminals 6
and 8.
• On the 900-TC32, Auxiliary Output 1 (SUB1) is output across terminals
5 and 6.
• On the 900-TC32, when heating/cooling control is used, auxiliary
output 1 becomes control output (cooling).
• When the HB, the HS, or heater overcurrent alarm is used with the
900-TC16, alarms are output across terminals 7 and 8.
• On the 900-TC16, when heating/cooling control is used, Auxiliary
Output 2 becomes control output (cooling).
• When the Input Error Output parameter is configured to ON, the
output assigned to Alarm Output 1 turns ON when an input error
occurs.
• For models that have a Heater Burnout Alarm (not supported by
900-TC32), an OR of the alarm 1 function and the HB/HS or heater
overcurrent alarm is sent to the output assigned to the alarm 1 function
(auxiliary output 1). If ALM1 is to be used for HBA only, configured the
Alarm 1 type to 0 and do not use Alarm function 1.
• The following diagrams show the internal equalizing circuits for Alarm
Outputs 1, 2, and 3.

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2-26 Preparations

Figure 2.23

SUB3

SUB2
SUB2
5
SUB1 SUB1 SUB1

900-TC8 Alarms 900-TC16 Alarms 900-TC32 Alarms

Note: ALM1, 2, 3 can be output to auxiliary output 1, 2, 3 or changed with the

Advanced Function level.The auxiliary relay specifications are as follows:

Table 2.K

900-TC8 and 900-TC16 SPST-NO 250V AC 3 A

900-TC32 SPST-NO 250V AC 2 A

Current Transformer (CT) Input

To determine if your controller supports the heater burnout function, refer to

Table 1.B for 900-TC8 or Table 1.E for 900-TC16. If the heater burnout
parameter function is used, connect a current transformer (CT) across the
terminals indicated in the following drawings in Figure 2.24.

Figure 2.24

13
CT1
14 14 CT2
CT CT1 CT CT2
15 15

900-TC16 with 900-TC16 with 900-TC8-@@@H1 900-TC8-@@@H3

Single-phase Three-phase SIngle-phase Three-phase
Burnout Option Burnout Option Burnout Burnout

Publication 900-UM007D-EN-E - January 2011

 Preparations 2-27

Wiring the Event Input

When the appropriate option event input unit is mounted in the Bulletin
900-TC8 or 900-TC16 controller, an event input function is available by wiring
to the controllers terminals as shown in the following diagrams.

Figure 2.25
A Do NOT apply an external voltage source to the Event Input Terminals

11

12 EV1 EV1
A A

13 EV2 EV2

900-TC16 900-TC8
Contact Event Contact Event
Input Input

Use event inputs under the following conditions:

• The output current from the controller is approximately 7 mA @ 5V.

• Contact input ON: 1 KΩ max., OFF: 100 KΩ min.
• Non-contact input ON: residual voltage 1.5V max., OFF: leakage
current 0.1 mA max.

Polarities using non-contact input are as follows:

Figure 2.26
− +
EV1 EV1
+ A + A
+ EV2 EV2
−

900-TC16 900-TC8
A Do NOT apply an external voltage source to the Event Input Terminals

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2-28 Preparations

RS-232C Communication to a Personal Computer —Bulletin 900-TC8 Only

By using the appropriate option communications unit in the Bulletin 900-TC8

or 900-TC16 Controller, you can communicate with a personal computer.

Figure 2.27 — Communication Unit Connection Diagram

RS-232C
No.
SD(TXD) 3 11 SD
RD(RXD) 2 12 RD
RS(RTS) 7 13 SG
PC CS(CTS) 8 ➊
DR(DSR) 6 900-TC8
SG 5
ER(DTR) 4
FG
9 Pin 1
(RS232C)
➊ RS232C for 900-TC8 only.

The RS-232C connection is one-to-one (PC to one Bulletin 900-TC8). The

maximum cable length for RS-232 is 15 m. An optional 3 m RS-232C interface
cable (Cat. No. 900-CP1x) is available as an extension cable if necessary. If you
make your own cable, use shielded, twisted pair cable (AWG 28 or larger).

Note: To configure the 900-TC8 using RS232 communication optional

software (900BuilderLite) is available.

RS-485 Communication to a Personal Computer

When the optional RS-485 communications unit is mounted in the Bulletin

900-TC8, 900-TC16, or 900-TS32, RS-485 communication with a personal
computer is possible. Connect the RS-485 communications cable across
controller terminals 11 and 12 for 900-TC8 or 900-TC16. Connect the RS-485
communications cable across controller terminals 7 and 8 for 900-TC32.

• Specify both ends of the transmission path, including the personal

computer as the end node (that is, connect termination resistors to both
ends).

The minimum terminal resistance is 54 Ω. (See Figure 2.28.)

Publication 900-UM007D-EN-E - January 2011

 Preparations 2-29

Figure 2.28 — Communication Unit Connection Diagram

900-TC8 & 900-TC16
Shielded Cable
PC with
RS232 to RS485 -
converter
such as +
900-CONV Controller No. X Controller X + 1
FG RS-485 RS-485
No Abbr. No Abbr.
12 A (–) 12 A (–)
A<B : “1” mark
A>B : “0” space 11 B (+) 11 B (+)

Terminator (120Ω, 1/2 W)

900-TC32
Shielded Cable
PC with
RS232 to RS485 -
converter
such as +
900-CONV Controller No. X Controller X + 1
FG RS-485 RS-485
No Abbr. No Abbr.
8 A (–) 8 A (–)
A<B : “1” mark
A>B : “0” space 7 B (+) 7 B (+)

Terminator (120Ω, 1/2 W)

• The RS-485 connection can either be one-to-one or one-to-N. Up to

32 units including the personal computer can be connected one-to-N.
For 900-TC8 & 900-TC16: Use shielded, twisted pair cable
(24…14AWG), and keep the total length to 500 m or less. For
900-TC32: Use shielded, AWG24 to AWG18 twisted pair cable.

Figure 2.29

Cross-sectional area
of conductor
AWG24: 0.205mm 2
AWG14: 2.081mm 2

• To use a PC on an RS-485 link/network connection, a

Bulletin 900-CONV RS-232-to-RS-485 or equivalent converter is
required.

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2-30 Preparations

Figure 2.30
900-TC8
900-TC8 900-TC16 and/or TC16

PC

RS-232

RS-485

900-CONV

Note: The PC must have 900BuilderLite software installed to

configure/monitor the Bulletin 900-TC8, 900-TC16, and/or 900-TC32
on an RS-485 network.

Using the Direct PC The direct PC communication port, available on the Series A and Series B
Bulletin 900-TC, 900-TC16, and 900-TC32 Controllers, enables direct PC to
Communications Port controller communications without the use of a communication option unit. A
900-CPOEM1 USB to serial conversion cable is required. The cable is
approximately 1 meter in length and connects to your PC’s USB port and the
controller’s direct communication port (refer to Figure 3).

900BuilderLite➊ is used with the cable to configure the 900-TC8, 900-TC16, or

900-TC32 controller.

➊
900 BuilterLite version 1.1 for Series A controllers and Version 1.2 for Series B controllers.

Procedure

Use the following procedure to connect the Temperature Controller to the

personal computer using the USB-Serial Conversion Cable. The USB-Serial
Conversion Cable is used to communicate with the COM port of the personal
computer. To perform communications using USB-Serial Conversion Cable,
configured the communications port (COM port) number to be used for the
software to the COM port assigned to the Cable.

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 Preparations 2-31

Hardware Installation

EXAMPLE

Figure 2.31 — Temperature Controller Connection Method

Personal Computer
900-CPOEM1 Cable
USB Port
Communications Port
for Support Software

Bottom View of Temperature Controllers

Communications Communications Port

Communications Port for Support for Support Software
Port for Support Software
Software

900-TC32

900-TC16

900-TC8

1. Turn ON the power to the Temperature Controller. Note: If the cable is

connected when the power to the Temperature Controller is OFF,
power will be supplied from the personal computer and impose a load
on the internal circuits of the Temperature Controller.

2. Connect the cable.

Connect the personal computer’s USB port with the Support Software
port on the Temperature Controller using the Cable. Note: Hold the
connector when inserting or disconnecting the cable.

3. Install the driver.

Note: The driver is available free of charge from the Bulletin 900 Temperature
Controller Website:
www.ab.com/industrialcontrols/products/relays_timers_and_temp_
controllers/single_loop_temp_heater_controllers/900tc.html. Refer to
the menu on the right and click on Get Software for Serial Conversion
Cable.
Install the driver to enable the cable to be used with the personal
computer. ➊
➊
900 BuilterLite version 1.1 for Series A controllers and Version 1.2 for Series B controllers

Publication 900-UM007D-EN-E - January 2011

2-32 Preparations

Driver Installation

When the cable is connected with the personal computer, the personal
computer’s operating system detects the product as a new device. At this time,
install the driver using the installation wizard. For details on installation
methods, refer to the user’s manual for the 900-CPOEM1-Serial Conversion
Cable.

When setting 900 BuilderLite for direct communication the port parameters of
the direct communication port are fixed as shown in Table 2.L. Set the
Bulletin 900 BuilderLite communication parameters to match those in
Table 2.L

Table 2.L — Fixed Port Parameters

Parameter Value
Communication Unit # 01
Communication Baud Rate 38.4 (Kbps)
Communication Data Length 7 (bits)
Communication Stop Bits 2 (bits)
Communication Parity Even

Publication 900-UM007D-EN-E - January 2011

 Chapter 3

Configuration & Basic Operation

Figure 3.1 — 900-TC8

Temperature Unit

No. 1 Display
Operation Indicators

No. 2 Display

Up Key
Function Group Key

Mode Key Down Key

Figure 3.2 — 900-TC16

Operation Indicators
SUB1 SUB2
HA SUB3

PV
Temperature Unit
No.1 Display

SV
No.2 Display

OUT1 STOP MV
Operation Indicators OUT2 CMW MANU
No.3 Display

Up Key
Mode Key

PF Function Key/
A/M
Function Group Key Auto/Manual Key

Down Key

3-1 Publication 900-UM007D-EN-E - January 2011

3-2 Configuration & Basic Operation

Figure 3.3 — 900-TC32

Publication 900-UM007D-EN-E - January 2011

 Configuration & Basic Operation 3-3

How Function Groups Are Parameters are divided into control categories, each called a function group.
Each of the items/values that can be configured in these function groups is
Configured and Operating called a parameter. The function groups on the Bulletin 900 controller are
the Keys on the Front Panel divided into the following:

Figure 3.4 — Function Group Configuration

Power ON
Start in manual mode.

Start in automatic mode.

Press the O Key or the

PF Key for at least 1 s.
(See note 4.) Press the
Operation Adjustment O +M
Function Group Function Group Press the Keys for at
O+M least 1 s.
Press the Keys for at
a-m O Key less than 1 s. least 3 s.
(Display c
25
will flash
after 1st 100
PF Key second.)
Press the O Key (See note 5.)
Manual (See for at least 3 s while PF Key Monitor/Setting
a-m is displayed. (See note 5.)
mode note (a-m will flash after Item Function Group
3.) 1st second.)

(See note 4.)

Press the O Key for at
Press the PF Key least 3 s. (Display will flash
Manual Control for at least 1 s. (See after 1st second.)
Function Group note 1.)
c
25
Press the 100
O Key for Protect Function Group
at least 1 s.
Note The time taken to move
to the protect function group can
Communica- be adjusted by chang-
Initial Setting
Control stops. tions Setting ing the "Move to pro-
Function Group Function Group
Press the tect function group time" setting.
O Key for less than 1 s.
Input password while
Press the O Key amoV is displayed. (Set
for at least 1 s. value −169)

Advanced Function
Setting Function Group

Input password. Control in progress

Control stopped
Calibration (See Not displayed for some models
Function Group note 2.)
Function Group change

Note (1) You can return to the operation function group by executing a software reset.
(2) You cannot move to other function groups by operating the keys on the front panel
from the calibration function group. You must turn OFF the power supply.
(3) From the manual control function group, key operations can be used to move to the
operation function group only.
(4) When the PF Setting is configured to A-M in models with a PF Key (900-TC8)
(5) When the PF Setting is configured to PFDP in models with a PF Key (900-TC8)

Publication 900-UM007D-EN-E - January 2011

3-4 Configuration & Basic Operation

Table 3.A — Control Categories

Function Group Control In Progress Control Stopped

Protect —
Operation —
Adjustment —
Manual Control —
Monitor/Setting Item —
Initial Setting —
Advanced Setting —
Calibration —
Communications Setting —

 To activate the Advanced Setting function group, set the Protect function group of the Initial/Communications
Protect to 0.
Indicates items that can be configured.

Of these control categories, the Initial Setting, Communications Setting,

Advanced Setting, and Calibration function groups can be used only when
control has stopped. Note that controller outputs are stopped/reset when any
of these four function groups are selected.

• Protect Function Group — To move to this function group,

simultaneously press the O and M keys for at least 3 seconds in the
Operation, Adjustment, or Monitor/Setting Item function group. This
function group is used to prevent unwanted or accidental modification
of parameters. Protected parameters will not be displayed, and so the
parameters in that function group cannot be modified.

Publication 900-UM007D-EN-E - January 2011

 Configuration & Basic Operation 3-5

Note: The key pressing time can be altered to your requirements. Refer to the
Move to Protect function group Time parameter in the Advanced
Setting function group.

• Operation Function Group — This function group is displayed when

you turn the power ON. You can move to the Protect, Initial Setting,
and Adjustment function groups from this point. This function group is
typically selected during operation. During operation, the process value
(PV), and manipulated variable (MV) can be monitored, and the SP,
Alarm Value, and Upper- and Lower-Limit Alarm parameters can be
monitored and modified.

• Adjustment Function Group — To move to this function group,

press the O key for less than 1 second from the Operation function
group. This function group is used to enter configuration values and
offset values for control. This function group contains parameters for
AT (Auto-Tuning), communications writing enable/disable, hysteresis,
multi-SP, Heater Burnout Alarm (HBA), Heater Short Alarm (HSA),
and PID constants. You can move to the top parameter of the Initial
Setting, Protect, and Operation function groups from here.

• Monitor/Setting Item Function Group (900-TC8)— To switch to

the Monitor/Setting Item function group press the PF key from the
Operation or Adjustment group. The parameter(s) configured for
Monitor/Setting Item 1 to 5 can be displayed. You can move from the
Monitor/Setting Item to the Operation of Initial Setting function
groups. Only the 900-TC8 supports this function group.

• Manual Control Function Group — When the O key is pressed for

at least 3 seconds from the Operation function group’s auto/manual
switching display, the Manual Control function group will be displayed.
(The MANU indicator will light.) When the PF setting is configured to
A-M (auto/manual) and PF key is pressed for more than 1 second in the
Operation or Adjustment function group the Manual Control group will
be displayed (900-TC8 only).This is the function group for changing the
MV in manual mode. To return to the Operation function group, press
the O key for at least 1 second.

• Initial Setting Function Group — To move to the Initial Setting

function group from the Operation or the Adjustment function group,
press the O key for at least 3 seconds. The PV display flashes after 1
second. This function group is for specifying the Input Type and
selecting the control method, control period, setting direct/reverse
action, and setting the alarm types. You can move to the Advanced
Setting or Communications Setting function group from this function
group. To return to the Operation function group, press the O key for
at least 1 second. To move to the Communications Setting function
group, press the O key for less than 1 second. (When moving from the
Initial Setting function group to the Operation function group, all the
indicators will light

Publication 900-UM007D-EN-E - January 2011

3-6 Configuration & Basic Operation

Note: Pressing the O key for at least 3 seconds in the Operation

function group’s auto/manual switching display will move to the Manual
Control function group, and not the Initial Setting function group.

• Advanced Setting Function Group — To move to the Advanced

Setting function group, set the Initial Setting/Communications Protect
parameter in the protect function group to 0 and then, in the Initial
Setting function group, input the password (−169). From the Advanced
Setting function group, it is possible to move to the Calibration function
group or to the Initial Setting function group. This function group is for
setting the display auto-return time, event input assignments, standby
sequence, and alarm hysteresis, and it is the function group for moving
to the user calibration.

• Communications Setting Function Group — To move to the

Communications Setting function group from the Initial Setting group,
press the O key once (for less than 1 second). When using the
communications function, set the communications conditions in this
group. Communicating with a personal computer (host computer)
allows set points to be read and written, and Manipulated Variables
(MV) to be monitored.

• Calibration Function Group — To move to the Calibration function

group, input the password (1201) from the Advanced Setting group. The
Calibration function group is for offsetting error in the input circuit.
You cannot move to other function groups from the Calibration group
by operating the keys on the front panel. To cancel this function group,
turn the power OFF then back ON again.

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 Configuration & Basic Operation 3-7

Selecting Parameters

Within each function group, the parameter is changed in order (or in reverse
order) each time the M key is pressed. (In the Calibration function group,
however, parameters cannot be changed in reverse order.) For details, refer to
Parameter Functions & Definitions on page 5-1.

Figure 3.5 — Parameters

Moves in order after M key While the M key is being held
is pressed (if key is down, the parameter will move
released within 1 s). each second in reverse order.

Parameter 1

Parameter 2 Parameter 2

After M key has

M been held down
for 2 s.

Parameter 3 Parameter 3
Hold down the M key
After M key during this interval. After M key has
is pressed been held down
for 1 s.

Parameter 4

Changing Parameters and Loading Values into Controller Memory

If you press the M key at the final parameter, the display returns to the top
parameter for the current function group.

To change parameter value or configuration (setup), modify the setting by

using the U or D key, and either leave the setting alone/unchanged for at
least 2 seconds or press the M key. This loads the present value displayed into
the controller’s memory.

When another function group is selected, the parameter and value on the
display are the ones currently loaded into controller memory.

When you turn the controller power OFF, ensure that the values are loaded
into memory by pressing the M key. The values and parameters setups are
sometimes not changed (loaded) by merely pressing the U or D key.

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3-8 Configuration & Basic Operation

Communications Function The Bulletin 900 temperature controller can be provided with a
communications function that allows you to check and set controller
parameters from a personal computer that has configuration and/or
monitoring software installed. If the communications function is required,
mount the appropriate option unit (refer to Table 1.C or 1.E) for the Bulletin
900 temperature controller.

Follow the procedure below to move to the Communications Setting function

group.

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

2. Press the O key for less than 1 second to move from the Initial Setting
function group to the Communications Setting function group.

3. Select the parameters as shown below by pressing the M key.

4. Press the U or D key to change the parameter setting.

Figure 3.6 — Communications Setting Function Group

psel Protocol setting

cwf
M
u-no Communications Unit No.
1
M
Communications baud rate
bps
9.6
M

len Communications data length
7
M
 bits
sbit Communications stop
2
M
prty Communications parity
even
M
Send data wait time
sdwt
20
M

 The Communication Data Length and Communication Stop Bits parameter is displayed only when 900-TC
communications are selected from the Protocol Setting parameter.

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 Configuration & Basic Operation 3-9

Setting Up Communications Parameter Data

Set the Bulletin 900 controller communication parameter specifications so that

they match the communication parameter setup for the personal computer,
using configuration/monitoring software such as 900BuilderLite. In a
multidrop (RS-485) 1:N configuration, match the setting data except for the
communications unit numbers on all 900-TC controllers. All Controllers must
have unique communications unit numbers.

Table 3.B

Parameter Symbol Configurable (Monitor) Value Selection Symbols Default Unit

Protocol setting psel 900-TC or Modbus cwf, mod 900-TC None
Communications Unit No. u-no 0…99 1 None
Communications baud rate bps 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 9.6 kbit/s
Communications data len 7, 8 7 Bits
length ✟
Communications stop bits sbit 1, 2 2 Bits
✟
Communications parity prty None, Even, Odd None, Even, Odd Even None
Send data wait time sdwe 0…99 20 ms

✟ The Communication Data Length and Communication Stop Bits parameter is displayed only when 900-TC
communications are selected from the Protocol Setting parameter.

Initial Setup Examples The O and M keys are used to switch between configuration menus, and the
amount of time that you hold the keys down determines which configuration
menu you move to. This section describes two typical examples.

EXAMPLE

Figure 3.7 — Explanation of Examples

Changing Parameters
A image means that there are parameters.
in-t Continue pressing the M key to change parameters
0 in-h until you reach the intended parameter.
100 M
M in-l
0 M
Changing Numbers
C
cntl cntl
25 Numeric data and selections in each
onof onof 0
screen can be changed by using the
U and D keys.

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3-10 Configuration & Basic Operation

Figure 3.8 — Typical Example 1

Input type: 5 (K thermocouple, Setup Procedure

−200°C to 1,300°C) Power ON Power ON
Control method: ON/OFF control
Alarm type: 2 (upper limit)
Operation
Alarm value 1: 20°C (deviation)
function
Set point: 100°C C
25 PV/SP
group
0

Press the O key for

Initial Setting at least 3 s.
function group Control stops.
Initial Setting
function group
Input type: 5
Set input
specifications
Check input type. in-t
5
M
Check that ON/OFF
Set control
specifications control method is cntl control:
onof
ON/OFF control. onof PID pid
M control:
Alarm 1 type: 2
Set alarm type
Check alarm type.
alt1
2
M

Press the O key for

at least 1 s.

Control starts.
Operation
function group
C
Use the U and 25 PV/SP: 100
D keys to set the 100
SP to 100°C.
Operation M
function Confirm that
control is running.
r-s Running run

group run Stopped: stop

M
Use the U and C

Set alarm values

D keys to set the al-1 Alarm value 1: 20
alarm value to 20°C. 20
M

Start operation Start operation.

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 Configuration & Basic Operation 3-11

Figure 3.9 — Typical Example 2

Input type: 9 (T thermocouple,
−200°C to 400°C)
Control method: PID control
PID constants found using
auto-tuning (AT).
Alarm type: 2 upper limit
Alarm value 1: 30°C
Set point: 150°C

Setup Procedure
Power ON Power ON

Operation
function group
C
25 PV/SP
0

Initial Setting Press the O key for

function at least 3 s.
Initial Setting Control stops.
group
function group
Set input
Use the U and
D keys to
in-t Input type: 9
specifications select the input 9
type.
M

Set control
Use the U and
D keys to select cntl ON/OFF
control:
onof For PID, set pid.
specifications PID control. pid PID pid
M control:
To execute on When ON, self-tuning
Use the U and
D keys to set ST
st ST: operates.
Set alarm type to OFF. off To cancel off
M ST:

Check the
control period.
cp Control period
(heat) 20
It is recommended that 20 seconds
20 (Unit: Seconds) be set for a relay output and 2
seconds for an SSR voltage output.
M
Check the
alarm type. alt1 Alarm 1 type: 2
2
M
Press the O key for
PV/SP at least 1 s.
after AT is
stopped
Operation Control starts.
C
function group
25 Use the U and C
25
150 D keys to set PV/SP: 150
Adjustment the SP to 150°C. 150
function C
26
group 150 Press the O key
Adjustment (for less than 1 s).
The set point function group
AT execution flashes during To execute on
auto-tuning (AT)
execution.
Execute AT. at AT:
To execute AT (auto-tuning), select
on: (AT execute), and to cancel AT,
off To cancel off
select off: (AT cancel).
After AT is AT:
(When PID stopped
control is Press the O key
at Operation (for less than 1 s).
selected) off function group
During AT C
execution Confirm that the
set point is 25 PV/SP
at 150°C. 150
Operation on M
function Confirm that
group control is r-s Running run
running. run Stopped stop

M
Set alarm value Use the U and C

D keys to set al-1 Alarm 30

the alarm value 30 value 1
to 30°C.
M

Start operation.

Start operation

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3-12 Configuration & Basic Operation

Configuring the Input Type The Bulletin 900-TC8, 900-TC16, and 900-TC32 controller support three
input/sensor types: (1) platinum resistance thermometer (RTD), (2)
thermocouple, and (3) non-contact temperature sensor. The Bulletin 900-TC8
and 900-TC16 controller support a fourth input/sensor type, analog inputs.

Program/configure the Input Type matched to your sensor using the Input
Type parameter (See Table 3.C). The Bulletin 900-TC8, 900-TC16, and
900-TC32 general controller specifications support two general types of
Global Temperature (GT) inputs: (1) platinum resistance thermometer input
and (2) thermocouple Input Types (refer to Table 3.C). The Bulletin 900-TC8
and 900-TC16 controller support a third a third GT input, analog inputs (refer
to Table 3.D). Check the cat. no. of your Bulletin 900 components at purchase
to ensure it matches your input requirements (refer to Tables 1.B and 1.D).

Input Type

Example Operation Procedure: Setting the Input Type to Thermocouple

Type K (–20.0…500.0°C) (See Table 3.C, — List of Global Temperature (GT)
Input Types)

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.10 — Operation Function Group

C
25
0
Figure 3.11 — Initial Setting Function Group
Input type
in-t
5

2. Press the U key to configure the Set Value for the type of sensor you
are using. Entering the Set Value will configure the controller for the
applicable Input Type and range. Example: When you use K
thermocouple (–20.0…+500.0°C), enter 6 as the Set Value (refer to
Table 3.C).

Note: The selected Set Value is loaded into controller memory if you do not
operate the keys on the front panel for 2 seconds after changing the
parameter, or by pressing the O or M keys. This applies to changing
all values and/or parameters.

Figure 3.12 — Set Value

in-t
6

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 Configuration & Basic Operation 3-13

Table 3.C — List of Global Temperature (GT) Input Types

Input Type Specifications Set Value Input Temperature Setting Range

ControllerType Platinum Resistance Pt100 0 −200…850 (°C)/−328…1,562 (°F)
with Thermometer (RTD)
1 −199.9…500.0 (°C)/−327.8…932.0 (°F)
Thermocouple
and Resistance 2 0.0…100.0 (°C)/32.0…212.0 (°F)
Thermometer
(RTD) JPt100 3 −199.9…500.0 (°C)/−327.8…932.0 (°F)
Multi-input 4 0.0…100.0 (°C)/32.0…212.0 (°F)
Thermocouple K 5 −200…1,300 (°C)/−328…2,372 (°F)
6 −20.0…500.0 (°C)/-4.0…932.0 (°F)
J 7 −100…850 (°C)/−148…1,562 (°F)
8 −20.0…400.0 (°C)/-4.0…752.0 (°F)
T 9 −200…400 (°C)/−328…752 (°F)
10 −199.9…400.0 (°C)/−327.8…752.0 (°F)
E 11 -200…600 (°C)/-300…1,100 (°F)
L 12 −100…850 (°C)/−148…1,562 (°F)
U 13 −200…400 (°C)/−328…752 (°F)
14 −199.9…400.0 (°C)/−327.8…752.0 (°F)
N 15 −200…1,300 (°C)/−328…2,372 (°F)
R 16 0…1,700 (°C)/32…3,092 (°F)
S 17 0…1,700 (°C)/32…3,092 (°F)
B 18 100…1,800 (°C)/212…3,272 (°F)
Infrared (non-contact) 10…70°C 19 0…90 (°C)/32…194 (°F)
temperature sensor ✟
60…120°C 20 0…120 (°C)/32…248 (°F)
115…165°C 21 0…165 (°C)/32…329 (°F)
140…260°C 22 0…260 (°C)/32…500 (°F)
Millivolt input 0…50 mV 23 Either of the following ranges, by scaling:
−1,999…9,999
−199.9…999.9
Thermocouple W 24 0…2,300 (°C)/0…3,200 (°F)
PL II 25 0…1,300 (°C)/0…2,300 (°F)

✟ The non-contact infrared sensor must be configurable for a Type K thermocouple output within either of the
four specified ranges. For example, in Omron ES1B or Calex EL Series (Convir) infrared sensor.
• The default is 5 (shaded).
• If an RTD is mistakenly connected while a setting for other than a
platinum resistance thermometer is in effect, the controller error code
s.err will be displayed. To clear the s.err display, check the wiring
and then turn the controller power OFF and back ON.

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3-14 Configuration & Basic Operation

Table 3.D — Analog Input Types (not supported by 900-TC32)

Input Type Specifications Set Value Process Input Setting Range

Models with Current input 4…20 mA 0 Either of the following ranges can be used by scaling
Analog Input −1,999…9,999
0…20 mA 1
−199.9…999.9
Voltage input 1…5V 2 −19.99…99.99
−1.999…9.999
0…5V 3
0…10V 4

• The default is 0 (shaded).

Selecting °C/°F Temperature Units

The Bulletin 900 controller allows you to select either °C or °F as the

temperature unit.

Configure the temperature units in the Temperature Unit parameter of Initial

Setting function group.

Note: The default is °C.

Example Operation Procedure: Select °C

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.13 — Operation Function Group

C
30
0
Figure 3.14 — Initial Setting
Input type
in-t
5

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 Configuration & Basic Operation 3-15

2. Select the Temperature Unit parameter by pressing the M key. Press the
U or D key to select either °C (c) or °F (f).

Figure 3.15 — Temperature Unit Parameter

Temperature unit
d-u
c
3. To return to the Operation function group press the O key for at least
1 second.
Figure 3.16 — Operation Function Group
C
20
0

The Operation function group is displayed when the Bulletin 900 controller is
turned ON. The upper display (No. 1) shows the process value (PV), and the
lower display (No. 2) shows the set point (SV or SP).

Configuring the SP Changing the SP

The set point cannot be changed when the Operation/Adjustment Protection

parameter is set to 3. For details, refer to page 4-33, Using the Key Protect Function
Group.

To change the set point, press the U or D key in the PV/SP parameter
(Operation function group), and load/program the desired value. The new set
point is loaded/programmed into memory 2 seconds after you have specified
the new value.

For 900-TC8 and 900-TC16 only: The Multi-SP parameter is used to switch
between two or four pre-configured set point values. Refer to page 4-16, Using
the Event Input Feature — 900-TC8 & 900-TC16 for details.

Example Operation Procedure

In this example, the set point will be changed from 0…200°C.

1. Normally, the PV/SP parameter is displayed. The current set point is 0

°C.

Figure 3.17
C
30
0

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3-16 Configuration & Basic Operation

2. Press the U or D key until the set point displayed is 200°C. To load
the value into the controller memory, either press the O key or wait
2 seconds.

Figure 3.18
C
30
200

Selecting PID Control or Overview

ON/OFF Control
The Bulletin 900 Controller supports two control methods: (1) 2-PID control
and (2) ON/OFF control. The control method is selected by the PID
ON/OFF parameter in the Initial Setting function group. When this
parameter is configured to pid, 2-PID control is set, and when configured to
onof, ON/OFF control is set.

Note: The default is ON/OFF control.

2-PID Control

Controller configured/selected P, I, and D (Proportional, Integral, and

Derivative) control parameters are set by the AT (Auto-Tuning) and ST
(Self-Tuning) parameters, or by manual (user) setup. For manual (user) PID
control, set the PID constants in the Proportional Band (P), Integral Time (I),
and Derivative Time (D) parameters. For more details refer to page 3-30.

ON/OFF Control

In the ON/OFF control method, the control output (MV) is turned ON when
the process value (measured temperature, flow, etc.) is lower than the current
set point, and the control output is turned OFF when the process value is
higher than the current set point. This is known as reverse operation. Direct
operation refers to control where the manipulated variable is increased
according to the increase in the process value. Refer to page 3-25 for more
details.

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Configuring the Output Control Period

Parameters
The Control Period parameter is used in the PID control method and allows
you to adjust the minimum amount of time between ON cycles of the
ON/OFF output (MV). This is sometimes referred to as timed proportional
PID control.

Figure 3.19 — Control Period Parameter

Control
period
(OUT1)
Control
period
(OUT2)

A shorter period may provide better ON/OFF control performance. We

recommend setting the control period to 20 seconds or more. In the case of
electromechanical relay outputs, doing this will improve its life expectancy. If
you are using an ON/OFF voltage output (SSR) setting, a shorter time will not
drastically impact the life of the SSR, since it is rated by the number of ON
hours. If necessary, readjust the Control Period by trial operation to meet the
needs of your application.

• You can configure the individual control period values in the Control
Period (HEAT) and Control Period (COOL) parameters (Initial Setting
function group). Note: The default is 20 seconds.

• The Control Period (COOL) parameter can be used only in the heating
and cooling control method.

• When Control Output 1 is used as an analog current output, the Control

Period (HEAT) parameter cannot be used.

Note: The Control Period parameter allows what is typically called Time
Proportioning ON/OFF Control to be done in the 2-PID method.

Direct/Reverse Operation

Figure 3.20 — Direct/Reverse Operation

orev
Direct operation refers to control where the manipulated variable (MV) is
increased according to the increase in the process value (PV). Alternatively,
reverse operation refers to control where the manipulated variable (MV) is
decreased according to the increase in the process value (refer to Figure 3.21).
Direct/reverse operation can be used in ON/OFF or PID control.

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3-18 Configuration & Basic Operation

Figure 3.21 — Direct/Reverse Operation

Manipulated variable (MV) Manipulated variable (MV)
100% 100%

0% 0%
High temperature High temperature
Low temperature Set value (SP) Low temperature Set value (SP)

Direct operation Reverse operation

For example, when the process value (PV) temperature is lower than the set
point (SP) temperature in a heating control system, the manipulated variable
(OUT1) increases (ON) by the difference between the PV and SP values.

Accordingly, this becomes reverse operation in a heating control system, or

alternatively, direct operation in a cooling control system.

Direct/reverse operation is set in the Direct/Reverse Operation parameter

(Initial Setting function group).

Note: The Direct/Reverse Operation parameter default is reverse operation.

EXAMPLE

Operation Procedure

In this example, the Input Type, Temperature Unit, Direct/Reverse Operation,

and Control Period (HEAT) parameters will be monitored.

The setup of parameters is as follows:

Input Type = 5: K thermocouple

Temperature Unit = c: °C
Direct/Reverse Operation = or-r: reverse operation
Control Period (HEAT) = 20 seconds

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

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 Configuration & Basic Operation 3-19

Figure 3.22
C
30
0

2. The Input Type is displayed. When you are monitoring/configuring the

Input Type for the first time, the set value is 0: K type thermocouple
default. (0 is set if you have a platinum resistance thermometer
compatible controller. To select a different sensor, press the U or D
keys. This changes the Set Value (refer to Table 3.A) to match your
desired sensor input.

Figure 3.23
Input type
in-t
5

3. Select the Temperature Unit parameter by pressing the M key. Note:

The default is c: °C. To configure f: °F, press the U key.
Figure 3.24
Temperature unit
d-u
c

4. Select the Control Period (OUT1) parameter by pressing the M key.

Note: The default is 20.

Figure 3.25
Control period
cp (heat)
20

5. Select the Direct/Reverse Operation parameter by pressing the M key.

Note: The default is or-r: reverse operation. To configure or-d:
direct operation, press the U key.

Figure 3.26
Direct/reverse
orev operation
or-r

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3-20 Configuration & Basic Operation

6. To return to the Operation function group press the O key for at least
1 second.

Figure 3.27
C PV/SP
30
0

7. Select the Move to Advanced Setting function group parameter by

pressing the M Key.
Figure 3.28
Move to

amov Advanced Setting

Function Group
0

Assigned Output Functions

• The control and auxiliary outputs of the 900-TC8, 900-TC16, and

900-TC32 can be individually assigned a function by using the Control
Output Assignment parameter in the Advanced Settings function group.
• The default function assignment for each output is shown in Table 3.E.

Table 3.E — Default Fuction Assignment

Parameter Name Symbol Initial Status

Control Output 1 out 1 Control Output (heating)
Assignment
Control Output 2 out 2 Not assigned
Assignment
Auxiliary Output 1 sub 1 Alarm 1
Assignment
Auxiliary Output 2 sub 2 Alarm 2
Assignment
Auxiliary Output 3 sub 3 Alarm 3
Assignment (900-TC8 only)
Note: Each output is automatically initialized as shown below by
changing the control mode

Note: Control Output 2 Assignment and Auxillary Output 2

Assignment are not supported by 900-TC32.

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 Configuration & Basic Operation 3-21

Table 3.F — 900-TC8 and 900-TC16

Without Control Output 2 With Control Output 2

Parameter Heating/ Heating/
Name Symbol Standard Cooling Standard Cooling
Control Output 1 out 1 Control output Control Control Control
Assignment (heating) output output output
(heating) (heating) (heating)
Control Output 2 out 2 Not assigned➊ Not Not Control
Assignment assigned assigned output
➊ (cooling)
Auxiliary Output sub 1 Alarm 1➋ Alarm 1➋ Alarm 1➋ Alarm 1➋
1 Assignment
Auxiliary Output sub 2 Alarm 2➌ Control Alarm 2➌ Alarm 2➌
2 Assignment output
(cooling)➌

➊ There is no control output 2 and no parameter assignment is displayed for that output.
➋ The Auxiliary Output 1 Assignment parameter becomes the program end output unless the Program
Pattern parameter is configured to OFF.
➌ For the 900-TC8, the Auxiliary Output 3 Assignment parameter is set as the control output for cooling.
(The Auxiliary Output 2 Assignment parameter is set for alarm 2).

Table 3.G — 900-TC32

Parameter Name Symbol Standard Heating/Cooling

Control Output 1 out 1 Control output Control output
Assignment (heating) (heating)
Auxiliary Output 1 sub 1 Alarm 1➋ Control output
Assignment (cooling)
➋ The Auxiliary Output 1 Assignment parameter becomes the program end output unless the
Program Pattern parameter is configured to OFF.

Alarms

It will be specified in this section when an alarm must be assigned (i.e., when
an alarm must be set) for the Control Output 1 or 2 Assignment parameters,
or for the Auxiliary Output 1 or 3 Assignment parameters. For example, if
alarm 1 is set for the Control Output 1 Assignment parameter, then alarm 1
has been assigned.

EXAMPLE

Operating Procedure
The following example configures the following control and auxiliary out
assignments: Control Output 1: Control Output (Heating); Control Output 2:

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Control Output (Cooling); Auxiliary Output 1: Alarm 1; Auxiliary Output 2:

Alarm 2
1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.
Figure 3.29
C PV/SP
25
100
2. Select the Standard or Heating/Cooling Control Mode parameter by
pressing the M key.
Figure 3.30
Input type
in-t
5
Figure 3.31
Standard or
5-hc heating/cooling
stnd
3. Press the U key to set the parameter to h-c (Heating/Cooling)
Control Mode.
Note: The following output assignments do not need to be set because
they are set automatically as defaults by changing the control mode, but
they are shown here as a reference for checking the assignments for each
output.

Figure 3.32

5-hc
h-c

4. Select the Move to Advanced Setting function group parameter by

pressing the M key.
Move to Advanced
amov Setting Function Group
0

5. Press the D key to enter the password (−169), and move from the
Initial Setting function group to the Advanced Setting function group.

Figure 3.33

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 Configuration & Basic Operation 3-23

6. Select the Control Output 1 Assignment parameter by pressing the M

key.

Figure 3.34
Control output 1
out1 assignment
o
7. Press the U or D key to set o.
(The default is o.)
Figure 3.35

out1
o

8. Select the Control Output 2 Assignment parameter by pressing the M

key.

Figure 3.36
Control Output 2
out2 Assignment
c-o
9. Press the U or D key to set c-o.
(When h-c is selected for the Standard or Heating/Cooling Control
Mode parameter, the setting will be c-o.)

Figure 3.37

out2
c-o
10. Select the Auxiliary Output 1 Assignment parameter by pressing the M
key.

Figure 3.38
Auxiliary Output
sub1 1 Assignment
alm1

11. Press the U or D key to set alm1.

(The default is alm1.)
Auxiliary Output
sub1 1 Assignment
alm1

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12. Select the Auxiliary Output 2 Assignment parameter by pressing the M

key.

Figure 3.39
Auxiliary Output
sub2 2 Assignment
alm2
13. Press the U or D key to set alm2.
(The default is alm2.)
Figure 3.40
Auxiliary Output
sub2 2 Assignment
alm2

14. Press the O key for at least 1 second to move from the Advanced
Setting to the Initial Setting function group.

Figure 3.41
Input type
in-t
5
15. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.

Figure 3.42
C PV/SP
25
100

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Auxiliary Output Opening or Note: Refer to Page 5.73, Auxiliary Output * Open in Alarm (* = 1 to 3), for
definition and furhter explanation of open in and close in alarm.
Closing in Alarm
• When “close in alarm” is configured, the status of the auxiliary output is
output unchanged. When “open in alarm” is configured, the status of
the auxiliary output function is reversed before being output.
• Each auxiliary output can be configured independently.
• These configurations are made in the Auxiliary Output 1 to 3 Open in
Alarm parameters (Advanced Setting function group).
• The default is n-o: Close in Alarm.
• When “open in alarm” is configured for the alarm 1 output, the open in
alarm status is also applied to heater burnout, HS alarm, heater
overcurrent, and input error outputs.

Table 3.H — Open In Alarm

Auxiliary Output Indicators

functions 1...3 Auxiliary Output (SUB1...SUB3)
Open in Alarm ON ON Lit
OFF OFF Not lit

Executing the ON/OFF Overview

Control Method
In the reverse operation ON/OFF control method, the control output (MV)
turns OFF when the controlled temperature (PV) reaches the user-defined set
point. When the control output (MV) turns OFF, the controlled temperature
begins to fall and the control output turns ON again. This operation is
repeated at a certain point. At this time, how much the temperature must fall
before the control output turns ON again is determined by the Hysteresis
(HEAT) parameter. Also, how much the manipulated variable must be
adjusted in response to the increase or decrease in the process value is
determined by the Direct/Reverse Operation parameter.

ON/OFF Control Parameters

Switching between the 2-PID control method and ON/OFF control method
is carried out by the PID ON/OFF parameter (Initial Setting function group).
When this parameter is configured to pid, 2-PID control is selected, and
when configured to onof, ON/OFF control is selected.

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The default is onof.

Hysteresis

In the ON/OFF control method, hysteresis is used to provide a

margin/differential for switching the control output ON when the controlled
temperature moves away from the required set point. The Hysteresis
parameter is used to give stability to the output around the set point.

The hysteresis value for HEAT control output and COOL control output
functions are configured in the Hysteresis (HEAT) and Hysteresis (COOL)
parameter functions respectively. In standard heating or cooling control, the
HEAT Hysteresis setting is used as the hysteresis setting (Adjustment function
group) regardless of the control mode, heating control or cooling control.

Figure 3.43 — Reverse Operation

Heat Hysteresis

ON

OFF PV
Set point

3-Position Control

In the heating and cooling control method, a dead band (an area where both
control outputs are 0) can be configured for either the heating or cooling side
of the set point. This makes 3-position control possible.

Figure 3.44 — Reverse Operation with 3-Position Control

Dead band

Hysteresis (OUT1) Hysteresis (OUT2)

ON
Heating Cooling
side side
OFF PV
Set point

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Table 3.I — Parameters

Symbol Parameter Name and Group Location Application

s-hc Standard or Heating/Cooling: Initial Setting For specifying the control
function group method
cntl PID ON/OFF: Initial Setting function group For specifying the control
method
orev Direct/Reverse Operation: Initial Setting function For specifying the control
group method
c-db Dead Band: Adjustment function group Heating/cooling control
hys Hysteresis (heating): Adjustment function group ON/OFF control
chys Hysteresis (cooling): Adjustment function group ON/OFF control

ON/OFF Control Setup

To execute ON/OFF control, configure the PID ON/OFF parameter.

EXAMPLE

Operation Procedure: Configuring the PID ON/OFF and Hysteresis Parameters

In this example, first check that the PID ON/OFF parameter is set to onof
in the Initial Setting function group. The Setpoint and Hysteresis parameters
will also be adjusted.

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.45
C PV
25
100

2. Display the Input Type parameter in the Initial Setting function group.

Figure 3.46
Input type
in-t
5

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3. Select the PID ON/OFF parameter by pressing the M key.

Figure 3.47
PID•ON/OFF
cntl
onof

4. Check that the configured control method parameter is onof

(Note: ON/OFF is the default).

5. To return to the Operation function group, press the O key for at least
1 second.

Setting the SP

Operating Procedure

In the second part of this example, the set point is modified to 200. The set
value (i.e., the SP) is shown on the controller’s bottom display.

1. Select the Process Value/Set Point parameter in the Operation function

group.

Figure 3.48
C PV/SP
25
100

2. Use the U and D keys to change the SP. (In this example, it is
configured to 200.)
The new set value can be loaded into controller memory by pressing the
M key, or it will go into effect after 2 seconds have elapsed. Next, set
the hysteresis.

Figure 3.49
C
25
200

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 Configuration & Basic Operation 3-29

Setting the Hysteresis

Operating Procedure

The third part of the example is to configure the hysteresis to 2.0°C.

1. Press the O key to move from the Operation function group to the
Adjustment function group.

Figure 3.50
Figure 3.51

C PV
25
200

2. The Adjustment function group Display parameter will be displayed in

the adjustment function group.
Figure 3.52
Adjustment
1.adj Display

3. Select the Hysteresis (Heating) parameter by pressing the M key.

Figure 3.53
C Hysteresis
hys (heating)
1.0

4. Press the U and D keys to set the hysteresis (2.0 in this example).
Either press the M key or wait for at least 2 seconds after setting the
hysteresis value to load the new value into controller memory.

Figure 3.54
C
hys
2.0

5. To return to the Operation function group, press the O key for at least
1 second.

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Determining PID Constants AT (Auto-Tuning)

(AT, ST, Manual Setup)
Figure 3.55

Overview

When you configure the controller to execute Auto-Tuning, the optimum PID
constants for the current set point during program execution are
automatically configured by the controller forcibly changing the manipulated
variable (MV) to calculate the characteristics (called the limit cycle method) of
the control target.

Either 40% AT or 100% AT can be selected depending on the width of MV

variation in the limit cycle. In the AT Execute/Cancel parameter, specify
at-2 (100% AT) or at-1 (40% AT). To cancel AT, specify off (AT cancel).

• Only 100% AT can be executed for heating and cooling control.

• AT cannot be executed when control has stopped or during ON/OFF
control.
• The results of AT are reflected in the Proportional Band (P), Integral Time
(I), and Derivative Time (D) parameters in the Adjustment function group.

The result of a controller AT cycle can be viewed/monitored from the

Proportional Band (P), Integral Time (I), and Derivative Time (D) parameters
in the Adjustment function group.

Figure 3.56 — PID

Adjustment Level
C Proportional Integral Derivative
p Band i Time d Time

(0 233 40

AT Description and Display Consideration

AT (Auto-Tuning) is started when you configure either at-2 (100%) or

at-1 (40% AT).During execution of AT, the No. 1 display for the AT
Execute/Cancel parameter blinks (refer to Figure 3.57). When AT ends, the
AT Execute/Cancel parameter turns OFF, and the No. 1 display stops
blinking.

Figure 3.57 — AT Execute/Cancel Parameter

AT Execute/Cancel
at at No. 1 display

off on

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If you move to the Operation function group during AT execution, the No. 2
display blinks to indicate that AT is still in the process of being executed.

Figure 3.58
PV/SP C
25
C
25
100 100 No. 2 display

AT execution in progress

Note: Only the Communications Writing, RUN/STOP, AT

Execution/Cancel, and Program Start parameters can be changed
during AT execution. Other parameters cannot be changed

AT Calculated Gain

The AT Calculated Gain parameter sets the gain when PID values are
calculated using AT. When you need to enhance response, decrease the set
value. When you need to enhance stability, increase the set value.

AT Hysteresis

The AT Hysteresis parameter configures the hysteresis when switching ON

and OFF for the limit cycle operation during auto-tuning.

Limit Cycle MV Amplitude

The Limit Cycle MV Amplitude parameter configures the MV amplitude for

limit cycle operation during auto-tuning.

Note: This parameter is disabled for 100% AT.

40% AT

The width of the MV variation in the limit cycle can be changed in the Limit
Cycle MV Amplitude parameter, but the AT execution time may be longer for
100% AT. The limit cycle timing varies according to the deviation (DV) at the
start of auto-tuning execution is less than 10% FS

Figure 3.59 — Limit Cycling Times

Deviation ≥ 10% FS Deviation < 10% FS
PV Limit Cycle MV PV Limit Cycle MV
Amplitude 40% Amplitude 40%

SP SP

Deviation: Deviation:
10% FS 10% FS

Time Time
AT started AT ended AT started AT ended

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3-32 Configuration & Basic Operation

100% AT

Operation will be as shown in the following diagram, regardless of the

deviation (DV) at the start of AT execution. To shorten the AT execution time,
select 100% AT.

Note: The Limit Cycle MV Amplitude parameter is disabled at 100% AT.

Figure 3.60 — Operation

PV Limit Cycle MV
Amplitude 100%

SP

Time
AT started AT ended

EXAMPLE

Operation Procedure: Execute 40% Auto-Tuning (AT)

Figure 3.61 — Adjustment Function Group
AT Execute/
at Cancel
off
1. Press the O Key to move from the Operation function group to the
Adjustment function group.

Figure 3.62

at
at-1

2. Press the U Key to select at-1. The No. 1 display for AT

Execute/Cancel will flash during AT execution.
Figure 3.63

at
off

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 Configuration & Basic Operation 3-33

3. off will be displayed when AT ends.

Figure 3.64
PV
25
0

4. To return to the operation function group, press the O Key.

Note: The newly configured value or parameter is loaded into controller

memory if you do NOT operate any key on the front panel for at least
2 seconds or by pressing the O or M key.

Note: When control characteristics are already known, either from experience
or from a previous AT cycle, the PID parameters can be configured
directly from the keypad to adjust control. PID parameter values are set
in the Proportional Band (P), Integral Time (I), and Derivative Time
(D) parameters in the Adjustment function group.

ST (Self-Tuning)

Figure 3.65 — Self-Tuning Function

In the ST (Self-Tuning) function, the 900-TC controller continually executes

step response tuning (SRT) from the start of program execution or when the
set point is changed to calculate the PID constants to match the actual control
target.

Once the self-tuning PID constants have been calculated, ST is not executed
during the next control operation cycle as long as the set point remains
unchanged.

ST is executed when the ST parameter is set to ON in the Initial Setting

function group.

When the ST function is in operation, make sure to turn ON the power supply
of the load connected to the control output (MV) simultaneously with or
before starting operation of the Bulletin 900 controller. If power to the
controller is turned ON before turning ON load power, self-tuning will not be
performed properly and optimum control will not be achieved.

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3-34 Configuration & Basic Operation

EXAMPLE

Operation Procedure: Execute Self-Tuning (ST)

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.66
Input type
in-t
5

2. Select the ST parameter by pressing the M key.

3. Press the U key to select on. Note: The default is ON.

ST
st
on

4. To return to the Operation function group, press the O key. The

temperature display blinks during Self-Tuning (ST) execution, and stops
when it is complete.
Figure 3.67
C ST
25
100

Note: When control characteristics are already known either from experience
or previous use of the AT or ST parameter, the individual PID
parameters can be set directly to adjust control. PID parameters are set
in the Proportional Band (P), Integral Time (I), and Derivative Time
(D) parameters in the Adjustment function group.

Conditions that Start Self-Tuning (SRT)

Self-tuning by Step Response Tuning (SRT) is started when either of the two
following major conditions are met:

• Program execution is started

• The set point is changed

The following table provides some additional details:

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 Configuration & Basic Operation 3-35

Table 3.J

At Start of Program Execution When Set Point is Changed

(Self-Tuning ON) (Self-Tuning ON)
1. The set point at the start of program 1. The new set point differs from the set
execution differs from the set point point used when the previous SRT was
when the previous SRT was executed.  executed. 
2. The difference between the controlled 2. The set point change width is larger than
temperature at start of program both of the following: (proportional
execution and the set point is larger than band x 1.27+4°C) and the ST stable
both of the following: (proportional range.
band x 1.27+4°C) and the ST stable 3. During reverse operation, the new set
range. point is larger than the set point before
3. The controlled temperature at the start the change; and during direct operation,
of program execution is less than the set the new set point is smaller than the set
point during reverse operation, and is point before the change.
greater than the set point during direct 4. The temperature is in a stable state. 
operation. Equilibrium with the output at 0% when
4. No reset from input error the power is turned ON is also all
right. 

 The previous SRT-implemented set point is the set point used for calculating the PID constant for the previous
SRT.
 In this state, the measurement point is within the ST stable range.
 In this state, the change width of the PV every 60 seconds is at the ST stable range or less.

New PID constants are not calculated by Self-Tuning (ST) for the currently
configured set point in the following instances:

• When the PID constants have been changed manually with ST set to
ON.
• When auto-tuning (AT) has been executed.

Self-Tuning (ST) Stable Range

The Self-Tuning (ST) stable range is a mechanism which allows you to

configure the value to determine the condition under which the ST function
occurs.

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3-36 Configuration & Basic Operation

In this example, the ST stable range will be configured to 20 °C.

EXAMPLE

Operation Procedure

1. Select the ST Stable Range parameter by pressing the M key in the

Advanced Setting function group. To move to this function group, refer
to page 4-31, To Move to the Advanced Setting Function Group.

Figure 3.68
C ST stable
st-b range
1%0

2. Set to 20 °C (deviation) using the U key. Note: The default is 15°C.

Figure 3.69
C
st-b
2*0

Note: Ensure the value is loaded into controller memory by waiting 2 seconds
or pressing the O key.

RT (Robust Tuning)

Figure 3.70

rt
When Auto-Tuning (AT) or Self-Tuning (ST) is executed with Robust-Tuning
(RT) selected, PID constants are automatically configured by the controller
that make it difficult for control performance to degenerate even when control
object characteristics are frequently changing.

RT is configured in the Advanced Setting function group when the PID

control mode is selected.

The RT mode cannot be selected when an analog input is configured.

Selecting the RT mode in the following cases will help to prevent the
occurrence of hunting by the MV.

• When the set point temperature is often changed and varies in a wide
range

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 Configuration & Basic Operation 3-37

• When there are large variations in ambient temperatures due to factors

such as seasonal changes or differences between day and night
temperatures

• When there are large variations in air flow in the control cabinet

• When heater characteristics change depending on the control system

temperature

• When an actuator with disproportional I/O, such as a

phase-control-type power regulator, is used

• When a heater is used with fast response characteristics

• When the control object or sensor has slow response

• When hunting occurs in AT or ST for any reason

Note: PID constants are initialized to the factory settings when switching to
RT. When RT is selected, the derivative time setting unit becomes
second.

RT Features

• Even when hunting occurs for PID constants when AT or ST is

executed in normal mode, it is less likely to occur when AT or ST is
executed in RT mode.

Figure 3.71 — Hunting

Temperature Temperature
Hunting occurs Hunting is reduced using RT
Set point value Set point value

Time Time
Start of control Start of control

• When the temperature (PV) falls short of the set point for the PID
constants when using AT or ST in normal mode, executing AT or ST in
RT mode tends to improve performance.

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3-38 Configuration & Basic Operation

Figure 3.72 — Executing AT or ST in RT Mode

Temperature Temperature

Improved with RT
Set point value Set point value

Time Time
Start of control Start of control

• When the manipulated variable (MV) is saturated, the amount of

overshooting may be somewhat higher in comparison to PID control
based on AT or ST in normal mode.

EXAMPLE

Operation Procedure

This example selects RT mode.

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.73
C PV/SP
25
100

2. Select the Move to Advanced Setting function group parameter by

pressing the M key.

Figure 3.74
Input type
in-t
5

3. Use the D key to enter −169 (the password).

It is possible to move to the Advanced Setting function group by
pressing the M key or leaving the setting for at least 2 seconds.

Figure 3.75
Parameter
amov
Move to Advanced
Setting Function Group init initialization
0 off

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 Configuration & Basic Operation 3-39

4. Press the M key to select rt (Robust Tuning).

Figure 3.76
RT
rt
off
5. Press the U key to select on. off is the default.

Figure 3.77

rt
on

6. To return to the Initial Setting function group, press the O key for at
least 1 second.

7. To return to the Operation function group, press the O key for at least
1 second.

Figure 3.78
C PV/SP
25
100

Manual PID Setup

The individual P, I, and D values can be manually set in the Proportional Band,
Integral Time, and Derivative Time parameters in the Adjustment function
group.

EXAMPLE

Operation Procedure
In this example, the Proportional Band parameter will be configured to 10.0,
the Integral Time parameter will be configured to 250, and the Derivative
Time parameter will be configured to 45.

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3-40 Configuration & Basic Operation

1. Press the O key to move from the Operation function group to the
Adjustment function group.

Figure 3.79
Adjustment Function
l.adj Group Display

2. Select Proportional Band by pressing the M key.

Figure 3.80
C Proportional
p band
8.0

3. Press the U or D key to set the Proportional Band parameter to 10.0.

Figure 3.81
C
p
10.0
4. Select Integral Time by pressing the M key.

Figure 3.82
Integral time
i
233
5. Press the U or D key to set the Integral Time parameter to 250.

Figure 3.83

i
250
6. Select Derivative Time by pressing the M key.

Figure 3.84
Derivative time
d
40

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 Configuration & Basic Operation 3-41

7. Press the U or D key to set the parameter to 45.

Note: This also loads the derivative time into controller memory.

Figure 3.85

d
45

8. To return to the Operation function group, press the O key.

Note: Proportional/Action: When PID values I (Integral time) and D

(Derivative time) are set to 0, control is executed according to
proportional operation, and the default set point becomes the center
value of the proportional band. In this case, a related parameter is
Manual Reset Value (Adjustment function group).

The following diagrams provide a basic explanation of how adjusting the P, I,

and D parameter values impact system operation.

Table 3.K — When P (Proportional Band) is Adjusted

When P is Set The curve rises gradually, and a long

increased Point stable time is achieved, preventing
PV overshoot.

When P is Overshoot and hunting occur, however

Set
decreased Point the set point is quickly reached after
which the curve stabilizes.
PV

Table 3.L — When I (Integral Time) is Adjusted

When I is It takes a long time for the process value

Set
increased Point to reach the set point. It takes time to
PV
achieve a stable state, however there is
little overshoot/undershoot and hunting.
When I is Overshoot/undershoot and hunting occur,
Set
decreased Point and the curve rises quickly.
PV

Table 3.M — When D (Derivative Time) is Adjusted

When D is Set
Overshoot/undershoot and stable time
increased Point are reduced; however, fine hunting occurs
PV
on changes in the curve it self.

When D is Overshoot/undershoot increase, and it

Set
decreased Point takes time for the process value to reach
PV
the set point.

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Alarm Outputs Alarm Types

The Bulletin 900-TC8 supports up to three alarm outputs, Bulletin 900-TC16

supports two alarm outputs, and Bulletin 900-TC32 supports one alarm
output..

The controller alarm output conditions are determined by the combination of

the selected Alarm Type, Alarm Value, Alarm Hysteresis, and Set Point (SP)
parameters.

Alarm types are configured independently for each alarm output using the
Alarm 1 and Alarm 2 Type parameters (Initial Setting function group).

Note: The default Set Value is 2: Upper-Limit (deviation).

Configure the alarm type and alarm output operation based on pre-defined
conditions using the Set Value number.

Note: The following table describes the Alarm Type, Alarm Value,
Upper-Limit Alarm, and Lower-Limit Alarm parameters.

Table 3.N — Alarm Values

Alarm Output Operation

When Alarm Value When Alarm Value
Set Value Alarm Type X is Positive X is Negative
0 Alarm function OFF Output OFF
1➊ Upper- and Lower-Limit ON
L H ➋
(deviation range) OFF
SP

2 Upper-limit (deviation) ON
X
ON
X
OFF OFF
SP SP

3 Lower-limit (deviation) ON
X
ON
X
OFF OFF
SP SP

4➊ Upper- and Lower-Limit L H ➌

ON
range (deviation range) OFF
SP

5 ➊➎ Upper- and Lower-Limit ➍

L H
with standby sequence ON
OFF
(deviation range) SP

6 Upper-limit with standby ON

X X
ON
sequence (deviation) OFF
SP OFF
SP

7 Lower-limit with standby ON

X
ON
X
sequence (deviation) OFF
SP
OFF
SP

8 Absolute-value ON
X X
ON
Upper-Limit OFF
0 OFF
0

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Table 3.N — Alarm Values

Alarm Output Operation

When Alarm Value When Alarm Value
Set Value Alarm Type X is Positive X is Negative
9 Absolute-value ON
X
ON
X
Lower-Limit OFF
0 OFF
0

10 Absolute-value ON
X X
ON
Upper-Limit with standby OFF
0 OFF
0
sequence
11 Absolute-value ON
X
ON
X
Lower-Limit with standby OFF
0 OFF
0
sequence
12 Loop Break Alarm (LBA) —
(Alarm 1 Type only)
13 PV Change Rate Alarm —

Note: Shading indicates default setting. Set the alarm type independently for
each alarm in the Alarm 1 to 3 Type parameters in the Initial Setting
function group. The default is 2 (Upper-limit alarm).

➊ With set values 1, 4 and 5, the upper- and lower- limit values can be set independently for each alarm type, and
are expressed as “L” and “H.”
➋ Set value: 1 (Upper- and Lower-Limit alarm)

Case 1 Case 2 Case 3 (Always ON)

H < 0, L < 0
L H SP SP L H H SP L
H < 0, L > 0
H < 0, L > 0 H > 0, L < 0 H L SP |H| ≥ |L|
|H| < |L| |H| > |L|
H > 0, L < 0
SP H L |H| ≤ |L|
➌ Set value: 4 (Lower-Limit range)

Case 1 Case 2 Case 3 (Always OFF)

H < 0, L < 0
L H SP SP L H H SP L

H < 0, L > 0 H > 0, L < 0 H < 0, L > 0

|H| < |L| |H| ≥ |L|
|H| > |L| H L SP

H > 0, L < 0
SP H L |H| ≤ |L|
➍ Set value: 5 (Upper- and Lower-Limit with standby sequence)
For the Lower-Limit alarms in cases 1 and 2 above, the alarm is normally OFF if upper- and Lower-Limit
hysteresis overlaps. In case 3, the alarm is always OFF.
➎ Set value: 5 (The alarm is always OFF if upper- and Lower-Limit alarm hysteresis with standby sequence
overlaps.)

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Alarm Value

Figure 3.86
Lower-limit
alarm value

Alarm value

Upper-limit
alarm value

Alarm types can be configured independently for each Alarm 1 to 3 in the

Initial Setting function group. The default is 2 (Upper Limit Alarm.)

Alarm values are indicated by X in Table 3.M. When the Upper- and
Lower-Limit values are set independently, H is displayed for the Upper-Limit
value, and L is displayed for the Lower-Limit value.

To set alarm deviation, use the Upper- and Lower-Limit Alarm parameters. Set
the Upper- and Lower-Limits in each of the Alarm Upper-Limit 1 to 3 and
Alarm Lower-Limit 1 to 3 parameters (Operation function group).

EXAMPLE

Operation Procedure

In this example, Alarm 1 will be set to the Upper-Limit alarm. The following
shows related parameters and setups. In this example, the alarm output is
active when the set point is exceeded by 10°C. (Temperature units in this
example is °C.)

Parameters to configure:

Alarm 1 Type = 2: Upper-Limit alarm (deviation)

Alarm Value 1 = 10 (10° greater than SP)

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 Configuration & Basic Operation 3-45

1. Press the O key for at least 3 seconds to move from the Operation to
the Initial Setting function group.

Figure 3.87
Input type
in-t
5
2. Select the Alarm 1 Type parameter by pressing the M key. Check that
the Alarm Type parameter is set to 2. Note: The default is Upper-Limit
alarm.

Figure 3.88
Alarm 1 type
alt1
2

3. To return to the Operation function group press the O key for at least
1 second.

Figure 3.89
C PV/SP
25
100

4. Select Alarm Value 1 by pressing M.

Figure 3.90
C Alarm value 1
al-1
0

5. Press the U key to configure the parameter to 10. This value is loaded
into memory by waiting 2 seconds or pressing the M key.
Figure 3.91
C
al-1
10

PV Change Rate Alarm The change width (rate of change) for PV input values can be found in any
time period. Differences with previous values in each set period are calculated,
then an alarm is output if the result exceeds the alarm value. The PV rate of
change calculation period can be configured in units of 250 ms.

If a positive value is configured for the alarm value, the PV will operate as a
change rate alarm in the rising direction. If a negative value is configured, the
PV will operate as a change rate alarm in the falling direction.

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Precaution

If a shorter PV rate of change calculation period is configured, outputs for the

PV change rate alarm may repeatedly turn ON and OFF for a short period of
time. Therefore, it is recommended that the PV change rate alarm be used with
the alarm latch turned ON.

Figure 3.92
PV

Time

Alarm value

0
PV change width for PV rate
of change calculation period
ON ON

OFF OFF
Alarm function

Table 3.O

Configurable
Parameter Name Range Units Default
PV Rate of Change Calculation Period 1...999 Sampling Cycle 4 (1 s)

Heater Burnout Alarm HBA, HSA, and HOA Alarm Detection — 900-TC8 & 900-TC16 only
(HBA), Heater Short Alarm
(HSA), and Heater Heater burnout and heater overcurrent detection are executed by:

Overcurrent Alarm (HOA) 1. measuring heater current with an optional current transformer (single
phase) or

2. transformers (3 -phase) while the control output for heating is ON, and
HS detection is executed by measuring heater current while it is OFF.

For details, refer to the following table and figure below..

Note: Heater burnout, heater short, and heater overcurrent detection cannot
be used with the control output for cooling.)

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 Configuration & Basic Operation 3-47

Table 3.P — Heater Burnout & Heater Overcurrent Detection

Heating Control Output Status

Control Output Operation Heater Overcurrent
(Heating) Indicator Power to Heater HBA Output HS Alarm Output Alarm
ON Lit Yes (Normal)  OFF — —
No (Heater burnout) ON — —
OFF Not lit Yes (HS alarm) — ON —
No (Normal)  — OFF —
ON Lit Normal — — OFF
Heater overcurrent status  — — ON

 In the above diagram, heater power is considered to be ON (normal) if the heater current, measured by the
900-CTX current transformer, is greater than the heater burnout detection current during the Ton interval. If the
heater is burned out, the measured current decreases and falls below the heater burnout detection value. The
configured controller output is then activated as the Heater Burnout Alarm.
 In the above diagram, heater power is considered to be OFF (normal) if the leakage current, measured by the
900-CTX current transformer, is less than the HS alarm current during the Toff interval. If the SSR output is
short-circuited, the measured current increases beyond the HS alarm value. The output is then activated as the
HS alarm.
 In the above diagram, it is regarded as normal when the heater current is less than the heater overcurrent
detection current during the Ton period. Current is increased when excessive current flows to the heater,
causing the heater overcurrent detection value to be exceeded and an OC (heater overcurrent) alarm to be
output.
Figure 3.93
Ton  Toff

ON

Control Output (heating)

OFF

Note: Heater Burnout Alarms (HBA) are not detected if the control output
(heating) ON time (Ton) - is 100 ms or less.

Note: Heater Short Alarms (HSA) are not detected if the control output
(heating) OFF time (Toff) is 100 ms or less.

• For controller models with HBA, HSA, and HOA alarms, an OR output
is established between the ALM 1 function and the HBA, HSA, and
HOA alarm. If the ALM1 function is to be used for HBA, HSA, and
HOA alarms only, set 0 as the ALM1 type and do not use ALM1.

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• Turn the heater power ON simultaneously or before turning power ON

to the 900-TC8 or 900-TC16 controller. If the heater power is turned
ON after turning ON the 900-TC8 and 900-TC16 power, the HBA will
be activated.

• The temperature controller continues to attempt to control the system

even when the HBA or HS alarm is active.

• The displayed current value may sometimes differ slightly from the
actual current flowing to the heater.
Use the Heater Current 1 Value Monitor, Heater Current 2 Value
Monitor, Leakage Current 1 Monitor, and Leakage Current 2 Monitor
parameters to check the actual current being used by the controller for
alarm purposes.

• If there is little difference between the displayed current in normal and

abnormal (i.e., alarm) states, detection may become unstable. To
stabilize detection, configure an alarm a current value difference of at
least 1.0 A for heaters of less than 10.0 A, and at least 2.5 A for heaters
of 10.0 A or more. If the heater current is too low, loop the load line
several times through a CT, as shown in the diagram below. Looping it
through twice will double the detection current.

Figure 3.94 — Loop Load Line

Load Line

CT

Installing Current Transformers (CT)

This function can be used with 900-TC8 controller models that have the HBA,
HSA, and HOA alarms and 900-TC16 controllers with the heater
burnout/heater short/heater overcurrent option unit installed.
For the 900-TC16, connect the CT in advance to terminals 14 and 15 (CT1), or
13 and 15 (CT2). For the 900-TC8, connect the CT in advance to terminals 14
and 15 (CT1) or 15 and 16 (CT2). Then pass the heater power line through the
CT's hole.
For specifications, models and dimensions of current transformers that can be
used with this Controller, refer to Appendix A.

Single-phase Heaters

For single-phase heaters, install the CT in the position shown in the following
diagram.

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Figure 3.95 — CT Position for Single-Phase Heaters

Load Load (such as a heater)

AC line
CT
To controller
CT input

Three-phase Heaters

When a 3-phase power supply is used, regardless of the types of connecting

lines, two current transformers (CTs) are required to detect heater burnout and
HS.

1. For Delta connecting power lines: Refer to the following diagram for
CT installation positions.

Note: Heater voltage fluctuations are not considered here. Take this into
account when setting the detection current.

Figure 3.96 — CT Installation Positions, Delta Connecting Power Lines

Lo
ad

ad
Lo
Load (such as a heater)
AC line Load

To controller CT input
AC line
CT
To controller CT input

2. For Star (Y) connecting power lines: Refer to the following diagram
for CT installation positions.

Note: Heater voltage fluctuations are not considered here. Take this into
account when setting the detection current.

Figure 3.97 — CT Installation Positions, Start (Y) Connection Power Lines

Load

Load (such as a heater)

Lo
ad ad
AC line Lo

CT
To controller CT input

CT
To controller CT input

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3-50 Configuration & Basic Operation

3. For V connecting power lines: Refer to the following diagram for CT

installation positions.

Note: Heater voltage fluctuations are not considered here. Take this into
account when setting the detection current.

Figure 3.98 — CT Installation Positions, V Connecting Power Lines

CT

ad
To controller CT input

Lo
Load (such as a heater)

Lo
ad
AC line
CT
To controller CT input

How to Calculate Heater Current Detection Values

• Calculate the heater current value to be configured by using the

following equation:

Heater Burnout Detection 1/2 set value = Normal current value + Burnout current value
2

Leakage current value (output OFF) + HS current value

HS Alarm 1/2 set value =
2

Heater overcurrent 1/2 set value = Normal current value + Overcurrent value
2

• To calculate the current for heater burnout when two or more heaters
are connected through the CT, use the heater current value when the
heater with the smallest current burns out. If all of the heaters have the
same current, use the value when any one of them burns out.

• Make sure that the following conditions are satisfied:

– When using a heater with a normal load current of less than 10.0 A:
(Current value at normal operation) − (Current value at heater
burnout) ≥ 1 A
When the difference is less than 1 A, detection is unstable.
– When using a heater with a normal load current of 10.0 A or more:
(Current value at normal operation) − (Current value at heater
burnout) ≥ 2.5 A
When the difference is less than 2.5 A, detection is unstable.

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 Configuration & Basic Operation 3-51

• The allowable controller heater current range is 0.1…49.9 A. Heater

burnout, HS, and heater overcurrent are not detected when the
configured alarm value is 0.0 or 50.0.
When the configured alarm value is 0.0, the Heater Burnout Alarm is
always OFF, the HS, and HO Alarm is always ON.
When the configured alarm value is 50.0, the Heater Burnout Alarm is
always ON, and the HS Alarm is always OFF, and the HOA is always
OFF.

• Configure the total current value for normal heater operation to 50 A or

less. When a current value of 55.0 A is exceeded, ffff is displayed in
the Heater Current 1 (and 2) Value Monitor and Leakage Current 1 (and
2) Monitor parameters.

Application Examples

Single-Phase Heaters

EXAMPLE

Using a 200V AC, 1 kW Heater

The heater power supply provides 5 A when the current is normal, and 0 A
when there is a burnout.

Figure 3.99
Normal Burnout

5 A→ AC line AC line

200 V Load 200 V Burnout Load Load (such as a heater)

←5 A 0A
CT CT
To CT Controller input To CT Controller input

Therefore, the heater burnout detection current is calculated as follows:

Heater burnout (Normal current) + (Heater burnout current) 5 + 0

detection current = = = 2.5 [A]
2 2

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3-52 Configuration & Basic Operation

EXAMPLE

Using Three 200V AC, 1 kW Heaters

The heater power supply provides 15 A when the current is normal, and 10 A
when there is a burnout.

Figure 3.100 — Using Three 200V AZ, 1 kW Heaters

Normal Burnout
15 A→ 10 A

Load Load Load

200 V Load Load Load 200 V
Burn-
←15 A 10 A out

CT CT
To CT Controller input To CT Controller input

Therefore, the heater burnout detection current is calculated as follows:

Heater burnout (Normal current) + (Heater burnout current) 15 + 10

detection current = = = 12.5 [A]
2 2

EXAMPLE

Using Three-Phase Heaters, Delta Connecting Lines

The current when each phase is normal is 17.3 A (≈ √3 × 10 A).

Figure 3.101 — Delta Connecting Lines

Normal
17.3 A→
Lo
ad

200 V
ad
Lo

17.3 A→
200 V Load

200 V
To CT input
17.3 A→
CT
To CT Controller input

The heater burnout current when there is a burnout at the load line is as
follows: (heater burnout detection current) = (17.3 + 15) / 2 ≈ 16.1 [A]

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 Configuration & Basic Operation 3-53

The heater burnout current when there is a burnout at the load is as follows:
(heater burnout detection current) = (17.3 + 10) / 2 ≈ 13.65 [A]

To enable detection in either case, use 16.1 A as the heater burnout detection
current.

Figure 3.102 — Heater Burnout Detection

Burnout Burnout
Burnout
10 A→
Burnout

ad

ad
Lo
200 V 200 V
Lo

Lo
ad

Lo
ad
15 A→ 200 V 17.3 A→
200 V Load Load
CT CT
200 V 200 V
To CT input To CT input

15 A→ CT 10 A→ CT
To CT Controller input To CT Controller input

Current when there is a burnout = 10 A × √3 × (√3/2) = 15 A Current when there is a burnout = 10 A × √3 × (1/√3) = 10 A

EXAMPLE

Using Three 200V AC, 2 kW Heaters, Star Connecting Lines

The current when each phase is normal is 5.8 A (≈ 10 A × (1 /√3)).

Figure 3.103 — Star Connecting Lines

Normal

5.8 A→
Load

200 V Load (such as a heater)

200 V
Lo
ad ad
5.8 A→ Lo

CT
200 V
To CT input

5.8 A→ CT
To CT Controller input

The heater burnout detection current for this connecting line is

5.4 A (= (5.8 + 5) / 2).

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3-54 Configuration & Basic Operation

Figure 3.104 — Heater Burnout Detection

Burnout
Burnout
5 A→

Load

Load
Load (such as a heater) Load (such as a heater)
200 V 200 V
Lo Lo
200 V ad ad 200 V ad ad
5 A→ Lo 5 A→ Lo

CT CT
200 V 200 V
To CT input To CT input Burnout

5 A→ CT CT
To CT Controller input To CT Controller input

Current when there is a burnout = 10 A × (1/√3) × (√3/2) = 5 A Current when there is a burnout = 10 A × (1/√3) × (√3/2) = 5 A

EXAMPLE

Using Two 200V AC, 2 kW Heaters, V Connecting Lines

Figure 3.105 — V Connecting Lines
Normal

10 A→
CT
ad
200 V To CT input
Lo

17.3 A→
200 V

200 V
Lo
ad

10 A
CT
To CT Controller input

The heater burnout current when there is a burnout at the common is as

follows:
Heater burnout detection current = (10 + 5) / 2 ≈ 7.5 [A]

The heater burnout current when there is a burnout at the load is as follows:
Heater burnout detection current = (10 + 0) / 2 ≈ 5 [A]

To enable detection in either case, use 7.5 A as the heater burnout detection
current.

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 Configuration & Basic Operation 3-55

Figure 3.106 — Heater Burnout Detection

Burnout

5 A→ 10 A→

CT CT

ad

ad
200 V To CT input
200 V To CT input

Lo

Lo
10 A→
200 V 200 V

200 V 200 V

Lo

Lo
ad

ad
Burnout
5 A→
CT CT
To CT Controller input To CT Controller input

Current when there is a burnout = 10 A × (1/2) = 5 A Current when there is a burnout = 0 A

Heater Burnout Alarm (HBA) Setup

To activate the Heater Burnout Alarm (HBA), configure:

1. the Heater Burnout (HB) ON/OFF parameter to ON in the Advanced

Setting function group, and

2. the Heater Burnout Detection 1 and Heater Burnout Detection 2

parameters in the Adjustment function group.
EXAMPLE

Operating Procedure: Moving to the Advanced Setting Function Group

In this example configure the Heater Burnout Detection 1 parameter to 2.5.

The Heater Burnout Detection parameter setting is already ON by default, so

set the Heater Burnout Detection 1 parameter.

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3-56 Configuration & Basic Operation

1. Move to the Advanced Setting function group.

Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.107
C PV/SP
25
100
2. Select Move to Advanced Setting function group by pressing the M key.

Figure 3.108
Input type
in-t
5

3. Press the D key to enter the password (−169), and move from the
Initial Setting function group to the Advanced Setting function group.
The top parameter in the Advanced Setting function group is displayed.

Figure 3.109
Moves to Advanced
amov Setting Function Group
init
-169 off

4. Select the Heater Burnout Detection parameter by pressing the M key.

Check that this parameter is set to ON (the default).
Next, set the Heater Current 1 Value Monitor parameter.

Figure 3.110
Heater burnout
hbu detection
on

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 Configuration & Basic Operation 3-57

Setting Heater Burnout Detection

1. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group and then to
the Operation function group.

Figure 3.111
C PV/SP
25
100
2. Press the O key for less than 1 second to move from the Operation
function group to the Adjustment function group.

Figure 3.112
Adjustment
l.adj group
function
display

3. Select the Heater Current 1 Value Monitor parameter by pressing the M

key. Check the current value. Next, set the Heater Burnout Detection 1
parameter.

Figure 3.113
Heater current
ct1 1 value monitor
0.0

4. Select the Heater Burnout Detection 1 parameter by pressing the M

key. Refer to How to Calculate Heater Current Detection Values when
making the settings.

Figure 3.114
Heater burnout
hb1 detection 1
0.0
5. For this example, set 2.5. To return to the Operation function group,
press the O key for less than 1 second.

Figure 3.115

hb1
2.5

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3-58 Configuration & Basic Operation

HS Alarm Setup

To activate the HS alarm, set the HS Alarm Use parameter to ON in the

Advanced Setting function group and set the HS Alarm 1 and HS Alarm 2
parameters in the Adjustment function group.

EXAMPLE

Operating Procedure: Moving to the Advanced Setting Function Group

The HS Alarm Use parameter setting is already ON by default, so set the HS

Alarm 1 parameter to 2.5.

1. Move to the Advanced Setting function group.

Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.116
C PV/SP
25
100
2. Select Move to Advanced Setting function group by pressing the M key.

Figure 3.117
Input type
in-t
5

3. Press the D key to enter the password (−169), and move from the
Initial Setting function group to the Advanced Setting function group.
The top parameter in the Advanced Setting function group is displayed.

Figure 3.118
Moves to Advanced
amov Setting Function Group init
-169 off

4. Select the HS Alarm Use parameter by pressing the M key.

Check that this parameter is set to ON (the default).
Next, set the Leakage Current 1 Monitor parameter.
Figure 3.119
HS alarm
hsu use
on

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 Configuration & Basic Operation 3-59

HS Alarm Settings

1. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group and then to
the Operation function group.

Figure 3.120
C PV/SP
25
100

2. Press the O key for less than 1 second to move from the Operation
function group to the Adjustment function group.

Figure 3.121
Adjustment
l.adj group
function
display

3. Select the Leakage Current 1 Monitor parameter by pressing the M key.

Check the current value. Next, set the HS Alarm 1 parameter.

Figure 3.122
Leakage current
lcr1 1 monitor
0.0

4. Select the HS Alarm 1 parameter by pressing the M key. Refer to How to

Calculate Heater Current Detection Values when setting the values.

Figure 3.123
HS alarm 1
hs1
50.0
5. For this example, set 2.5. To return to the Operation function group,
press the O key for less than 1 second.
Figure 3.124

hs1
2.5

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3-60 Configuration & Basic Operation

Heater Overcurrent Alarm To activate the heater overcurrent alarm (HOA), set the:
Set-up 1. Heater Overcurrent Use parameter to ON in the Advanced Setting
function group and

2. Heater Overcurrent Detection 1 and Heater Overcurrent Detection 2

parameters in the Adjustment function group.

Note: This procedure configures the Heater Overcurrent Detection 1

parameter to 20.0.

Moving to the Advanced Setting Function Group

The default setting for the Heater Overcurrent Use parameter is ON, so set
the Heater Overcurrent Detection 1 parameter

Move to the Advanced Setting function group. Press the O Key for at least three seconds to
move from the Operation to the Initial Setting function group.
Figure 3.125
C PV/SP
25
100

3. Press the M Key to select the Move to Advanced Setting function

group parameter. (For details on moving between function groups, refer
to 4-8 Moving to the Advanced Setting function group.)
Figure 3.126
Input Type
in-t
5

4. Press the D Key to enter the password (-169), and move from the
Initial Setting function group to the Advanced Setting function group.
Figure 3.127

amov
-169
The top parameter in the Advanced Setting function group is displayed.
Move to the
init Advanced
Setting
off function group

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 Configuration & Basic Operation 3-61

5. Press the M Key to select the Heater Overcurrent Use parameter.Check

that this parameter is set to ON (the default), and then set the Heater
Overcurrent Detection 1 parameter.
Figure 3.128
Heater
ocu Overcurrent
Use
on

Configure Overcurrent Detection

1. Press the O Key for at least one second to move from the Advanced
Setting function group to the Initial Setting function group. Press the
O key again for at least one second to move to the Operation function
group.

Figure 3.129
C PV/SP
25
100

2. Press the O Key for less than one second to move from the Operation
function group to the adjustment function group.
Figure 3.130
Adjustment function
l.adj group display

3. Press the M Key to select the Heater Current 1 Value Monitor

parameter.Check the current value, and then modify the Heater
Overcurrent Detection parameter in step #8 to meet the requirements
of your application.
Figure 3.131
Heater Current
ct1 1 Value Monitor
0.0

4. Press the M Key to select the Heater Overcurrent Detection 1

parameter. Refer to Calculating Detection Current Values when setting
the values.
Figure 3.132
Heater
oc1 Overcurrent
Detection 1
50.0

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3-62 Configuration & Basic Operation

5. For this example, set 20.0. To return to the Operation function group,
press the O Key for less than one second.
Figure 3.133

oc1
20.0

Set-up of the No. 3 Display This section describes how to configure the No. 3 Display (900-TC8). The
Multi-SP, MV or Soak Time Remain parameters can be displayed on the No. 3
display.

PV/SP Display Selection

The following table shows the set values and display contents for the PV/SP
Display selection.

Table 3.Q — PV & SP Display Selection

Set Value Display Contents

0 Only PV/SP is displayed (with no No. 3 display.)
1 PV/SP/Multi-SP and PV/SP/MV are displayed in order. 
2 PV/SP/MV and PV/SP/Multi-SP are displayed in order. )
3 Only PV/SP/Multi-SP is displayed.
4 Only PV/SP/MV is displayed. 
5 PV/SP/Multi-SP and PV/SP/Soak time remain are displayed in order.
6 PV/SP/MV and PV/SP/Soak time remain are displayed in order. 
7 Only PV/SP/Soak time remain is displayed.
 A 2-level display is configured when shipped from the factory. (set value: 0). A
3-level display is activated if parameters are initialized. (set value: 4)

Note: For details on configuring the MV for heating and cooling control, refer
to MV Display for Heating and Cooling Control below.

When 1, 2, 5, or 6 is selected, press the M Key to display the next value

set for the PV/SP display (display 2).

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 Configuration & Basic Operation 3-63

EXAMPLE

When the PV/SP Display Screen Parameter Is Set to 2

Figure 3.134
Operation Function Group
PV/SP (Display 1) PV/SP (Display 2)
Press the
C
C
25 M key 25
100 100
50.0 sp0
PV/SP/MV PV/SP/Multi-SP

MV Display for Heating and Select either the manipulated variable (heating) or manipulated variable
(cooling) as the MV to be displayed for PV/SP/MV during heating and
Cooling Control cooling control. The MV Display Selection parameter is displayed only when:

1. heating/cooling control is being performed and PV/SP/MV is selected

in the PV/SP Display Screen parameter or

2. a Monitor/Setting Item Display parameter.

Table 3.R

Parameter Name Set Value Symbol Display Contents

MV Display O o Manipulated variable (heating)

Selection C-O c-o Manipulated variable (cooling)

EXAMPLE

PV/SP/MV and PV/SP/Multi-SP on the Process Value/Set Point Display

This procedure displays PV/SP/MV and PV/SP/Multi-SP on the Process

Value/Set Point display. The PV/SP Display Screen Selection parameter is set
to 2.

1. Press the O Key for at least three seconds to move from the Operation
function group to the Initial Setting function group.

Figure 3.135
C PV/SP Input Type
25 in-t
100 5

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3-64 Configuration & Basic Operation

2. Press the M Key to select the Move to Advanced Setting function

group.
Figure 3.136
Move to
amov Advanced
Function Setting
-169 Level

3. Use the D Key to enter the password (“-169”). It is possible to move to

the Advanced Setting function group by either pressing the M Key or
waiting two seconds without pressing any key.
Figure 3.137

init Parameter
Initialization
off

4. Press the M Key to select the PV/SP Display Screen Selection

parameter.
Figure 3.138 — PV/SP Display Screen
PV/SP Display
spdp Screen Selection
4

5. Use the U and D Keys to configure the parameter to a value of 2.

Figure 3.139

spdp
2

6. Press the O Key for at least one second to move from the Advanced
Setting function group to the Initial Setting function group.
Figure 3.140
Input Type
in-t
5

7. Press the O Key for at least one second to move from the Initial
Setting function group to the Operation function group. The MV will
be displayed on the No. 3 display.
Figure 3.141
C PV/SP
25
100
50.0

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 Configuration & Basic Operation 3-65

8. Press the M Key to confirm that the Multi-SP is displayed on the No. 3
display.
Figure 3.142
C PV/SP
25
100
sp0

System Setup/Operational 1. Allow at least a 30 minute warm-up period for the system to fully
stabilize.
Considerations
2. When self-tuning is used, either a) turn the temperature controller and
load (e.g., heater) power ON simultaneously or b) turn the load power
ON before the temperature controller. Note: If the load is turned ON
before the temperature controller, correct self-tuning and optimum
control are no longer possible.

When operation is started after system warm-up, turn the power to the
system OFF once after warm-up is completed, and then turn the
temperature controller and load power ON simultaneously.

Note: Rather than turning the temperature controller power ON again,

moving from the STOP to the RUN mode is also possible.

3. The temperature controller may be subject to the influence of radio

interference if used near a radio, TV, or wireless equipment. Refer to
Appendix on page A-1 for additional information.

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3-66 Configuration & Basic Operation

Notes:

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 Chapter 4

Parameter Adjustments & Application

Considerations

Shifting Input Values Overview

The Input Shift parameter allows you to configure the controller to

compensate for possible deviation of the measured temperature (PV) to the
actual temperature at the source (control target). The controller supports two
types of input shifts, 1-point and 2-point. The input shift type is automatically
matched to the sensor currently selected by the Input Type parameter
(configured value — See Table 3.C, — List of Global Temperature (GT) Input
Types). There is no shift for analog inputs. Use scaling for fine adjustments.

1-Point (Uniform) Shift

Overview

Figure 4.1

With 1-point shift operation, the Temperature Input Shift parameter

(Adjustment function group) is applied to the entire temperature input range
in a uniform or consistent manner. In other words, the adjusted value is
applied equally to each input/sensor value read by the controller and displayed
as such. For example, if the input shift value is configured to 1.2 °C, the
process value is treated by the controller as 201.2 °C after input shift is applied
when the measured process value is 200 °C (refer to Figure 4.2).

Figure 4.2 — One-Point Shift

Temperature

Upper-limit
value
After shift

Before
shift
Lower-limit Input shift value
value
Input
0
100

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4-2 Parameter Adjustments & Application Considerations

EXAMPLE

Operation Procedure: Operation Function Group

In this example, apply a 1 °C by 1-shift to the input value of a type K

thermocouple sensor.

1. Press the O key to move from the Operation function group to the
Adjustment function group.

Figure 4.3 — Operation Function Group

C
30
200
Figure 4.4 Adjustment Function Group
Adjustment level
l.adj display

2. Select the Temperature Input Shift parameter by pressing the M key.

Figure 4.5 — Temperature Input Shift

C Temperature
ins input shift
0.0

3. Press the U or D key to set 1.

Figure 4.6 — Set Shift Parameter

C
ins
1.0

4. To return to the Operation function group, press the O key. The

process value is 1°C larger than before the shift was applied.

Figure 4.7 — Operation Function Group

C
31
200

Note: The newly configured value or parameter is loaded into controller

memory if you do NOT operate any key on the front panel for at least
2 seconds or by pressing the O or M key.

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 Parameter Adjustments & Application Considerations 4-3

2-Point Shift

Overview

The 2-point shift can be applied to thermocouple, RTD, and a non-contact

sensor (infrared type K thermocouple).

Figure 4.8 — Temperature Limit Shift Value

Upper-limit
insh temperature
input shift value
Lower-limit
insl temperature
input shift value

• The input temperature range of the temperature sensors can be shifted

by setting an individual value for the upper and lower end points of the
sensor range. This means that the shift can be applied equally across the
range with separate values for each end of the range. For example, if the
Upper-Limit value is set to 2 °C and the Lower-Limit value is set to 1
°C, the sensor range is shifted by an average of 1.5 °C at the 50% input.

• Set the Upper-Limit value in the Upper-Limit Temperature Input Shift

Value parameter and the Lower-Limit value in the Lower-Limit
Temperature Input Shift Value parameter.

Figure 4.9 — Two-Point Shift

Temperature Upper-limit temperature input shift value

Upper-limit
value After shift

Before shift

Lower-limit value
Input
0 Lower-limit temperature 100
input shift value

How to Calculate Input Shift Values

When a non-contact temperature sensor (for example, OMRON ES1B sensor)

is connected to the Bulletin 900-TC8, 900-TC16, or 900-TC32, an offset of
several degrees to several tenths of a degree can occur. For this reason, it may
be desirable to offset the readout value by 1-point or 2-point shift as described
here.

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4-4 Parameter Adjustments & Application Considerations

Preparations

1. Set to the temperature range to match the input specifications of the

non-contact temperature sensor (refer to Table 3.C, — List of Global
Temperature (GT) Input Types). Note: The non-contact infrared sensor is
supported only in thermocouple Input Type Bulletin 900-TCX
controllers. Refer to Table 1.B through Table 1.F.)

2. Prepare a thermometer (B) capable of measuring the temperature of the

control target (C) as shown in Figure 4.10 so that 1-point shift or
2-point shift can be carried out.

Figure 4.10 — Configuration when Compensating a Non-Contact Infrared

Temperature Sensor

Infrared Non-Contact (C) Control Target

Temperature Sensor

(B) Thermometer

(A) 900-TC8, 900-TC16, or 900-TC32

Temperature Controller

Using the 1-Point Shift Method

Figure 4.11

1. In the temperature control configuration shown in Figure 4.10, bring

the set point to near the value at which the temperature of the control
target is to be controlled. Assume that the control target temperature
(C) and the control target temperature (B) match.

2. Check the control target temperature (B) and the controller readout (A).
Take the value from the following equation as the Input Shift Value, and
configure the same numerical value to cns.

Control target temperature (B) – Controller readout (A) =

Input shift value

Figure 4.12 shows the effect of 1-point temperature input shift.

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 Parameter Adjustments & Application Considerations 4-5

Figure 4.12 — One-Point Temperature Input Shift

Controller readout (A)
After shift
Temperature readout
after shift (e.g. 120°C) Input shift value (e.g. 10°C)
Temperature readout
before shift (e.g. 110°C) Before shift

Temperature readout of
0 Near set point control target (B)
(e.g. 120°C)

3. After you have configured the 1-point input shift value, check the
controller readout (A) and control target temperature (B). If they are
almost the same, this completes temperature input shift procedure.

Using the 2-Point Shift Method

Use the 2-point input shift method if you want to increase the accuracy of the
readout values across the range of your temperature sensor.

1. When using the 2-point shift method, shift the controller readout at two
points: — the first, near room temperature and — the second, near the
value at which the temperature of the control target is to be controlled.

Therefore, for this procedure, bring the control target temperature to

near room temperature and to near the set point, and check control
target temperature (B) and controller readout (A). Refer to Figure 4.10

2. Using the equations below, calculate the upper- and lower-limit

temperature input shift values from the readout and temperature to be
shifted that you obtained in step 1.

– Equation 1: Use the following equation to calculate the Lower-Limit

temperature input shift value.
YL − Y1
insl = × {(X2 − Y2) − (X1 − Y1)} + (X1 − Y1)
Y2 − Y1
– Equation 2: Use the following equation to calculate the Upper-Limit
temperature input shift value.
YH − Y1
insh = × {(X2 − Y2) − (X1 − Y1)} + (X1 − Y1)
Y2 − Y1
– Figure – shows the effect of shift by 2-point temperature input shift.

Note: For meanings of variables, refer to Figure –.

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4-6 Parameter Adjustments & Application Considerations

Figure 4.13 — Two-Point Temperature Input Shift

Controller readout (A)

Set temperature
upper limit YH After shift
(e.g. 260°C)

Temperature readout Upper-limit temperature

after input shift X2 (e.g. 110°C) input shift value

Before shift
Temperature readout
before input shift Y2 (e.g. 105°C)

Temperature readout
before input shift Y1 (e.g. 40°C)
Temperature readout
after input shift X1 (e.g. 25°C) Temperature readout of
0 X1 room temperature control target (B)
Lower-limit temperature (e.g. 25°C)
input shift value Near X2 set point (e.g. 110°C)
Set temperature
lower limit YL (e.g. 0°C)

3. After you have configured the calculated values for cnsl for and
cnsh, check/compare controller readout (A) with the control target
temperature (B).

Figure 4.14 — Temperature Input Shift Value

C Upper-limit
insh temperature
input shift
10.0 value

C Lower-limit
insl temperature
input shift
10.0 value

4. Although the input shift was carried out at two points, close to room
temperature (ambient temperature) and near to the set point, you may
want to consider selecting points close to each end of the sensor range
to improve accuracy across the full range of the sensor measurement
range.

Note: Before selecting these values, check that they will not damage the
control application, if applied.

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 Parameter Adjustments & Application Considerations 4-7

EXAMPLE In this example, we use the non-contact (infrared) sensor

type K thermocouple 0…260 °C specification to do a
2-point shift.
YL and YH in equations 1 and 2 are set temperature
Lower-Limit (YL = 0 °C) and set temperature Upper-Limit
(YH = 260 °C). Check the temperature of the control
target.
When the room temperature (X1) is 25 °C, the readout on
the controller (Y1) is 40 °C, and when the temperature near
the set point (X2) is 110 °C, the readout on the controller
(Y2) becomes 105°C.
Lower-limit temperature input shift value:
C Lower-limit
insl temperature
input shift
-27.3 value

0 – 40
insl = x {(110 – 105) – (25 – 40)} + (25 – 40) = –27.3°C
105 – 40

Upper-limit temperature input shift value:

C Upper-limit
insh temperature
input shift
52.7 value

60 – 40
insh = x {(110 – 105) – (25 – 40)} + (25 – 40) = –52.7°C
105 – 40

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4-8 Parameter Adjustments & Application Considerations

Alarm Functions/ Alarm Hysteresis

Parameters
You can configure/program how much deviation (hysteresis) is allowed from
the alarm value before the alarm comes on and reset.

The hysteresis of alarm outputs when alarms are switched ON/OFF can be
set as follows:

Figure 4.15 — Hysteresis of Alarm Outputs

Upper-Limit Lower-Limit
Alarm Alarm
Alarm Hysteresis Alarm Hysteresis

ON ON
Normal Normal
Operating Operating
Area Area
OFF OFF
SP SP
Alarm Value Alarm Value

Alarm hysteresis is independently set for each alarm output in the Alarm
Hysteresis 1…3 parameters (Advanced Setting function group).

Note: The default is 0.2 (°C or °F depending on your units selection) for
temperature inputs and 0.02% of full scale (FS) for analog inputs.

Standby Alarm Sequence

Standby alarm sequence is a function which allows you to configure the alarm
outputs to be temporarily disabled until after the first alarm condition occurs.
From then on, the alarm output is active for all future alarm conditions.

For example, in a standard heating application, if you used the standard low
alarm configuration, the alarm would be active as soon as you switch the
controller ON. However, with standby sequence, the alarm output is disabled
during the first warm-up, and the temperature has to rise above the alarm set
point before the alarm can become active. Then, if the temperature falls below
the alarm set point, the output is active.

Restart

As mentioned above, the standby sequence is canceled after the first real
alarm clears. If desired, it can be restarted later by the Standby Sequence
parameter (Advanced Setting function group). For details, refer to page 5-72,
Standby Sequence Reset Method.

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 Parameter Adjustments & Application Considerations 4-9

Alarm Latch

Alarm latch is a function where you can configure the alarm output once
turned ON to stay ON regardless of the process temperature.

The alarm latch function can be canceled by:

1. Turning the controller power OFF. Note, however, that it can also be
canceled by switching to the Initial Setting function group,
Communications Setting function group, Advanced Setting function
group, or Calibration function group.

2. Use the PF key (900-TC8).

3. Use an event input (900-TC8 and 900-TC16).

Summary of Alarm The following figure summarizes the operation of alarms when the Alarm
Type parameter is set to “lower-limit alarm with standby sequence” and “close
Operations in alarm” is set.

Figure 4.16 — Operation of Alarms Summary

Alarm type: Lower-limit alarm with standby sequence

PV
Alarm value
Alarm hysteresis

Time
Standby sequence
canceled ON
Alarm OFF
ON (closed)
Output OFF (open)

Table 4.A
Symbol Parameter: Group Description
alh✽ Alarm 1 to 3 Hysteresis: Alarm
Initial Setting function
group
rest Standby Sequence: Alarm
Advanced Setting
function group
✽ = 1 to 3

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Configuration of Scaling Figure 4.17

Upper-Limits and Scaling in-h Scaling Upper Limit

Lower-Limits for Analog

Input in-l Scaling Lower Limit

dp Decimal Point

Overview

When an analog input sensor is selected, scaling to engineering units (e.g., lbs)
that match the application is possible.

Scaling is configured in the Scaling Upper-Limit, Scaling Lower-Limit, and

Decimal Point parameters (Initial Setting function group). These parameters
cannot be used when a temperature Input Type (e.g., RTD) is selected.

The Scaling Upper-Limit parameter allows you to configure the physical

quantity to be expressed by the Upper-Limit input value. The Scaling
Lower-Limit parameter sets the physical quantity to be expressed by the
Lower-Limit value. The Decimal Point parameter specifies the number of
digits to the right of the decimal point.

Figure 4.18 shows a scaling example of a 4…20 mA input, supported by

900-TC8 and 900-TC16. After scaling, the humidity sensor input can be
directly read from the controller as a percentage of humidity. However, the
display will not indicate%, only a value. The decimal point is configured one
digit to the right.

Figure 4.18 — Input Scaling

Readout
(humidity)

Upper-limit value (95.0%) 20 mA

Lower-limit value (10.0%) 0mA

Input
0 (4…20 mA)
100%FS

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 Parameter Adjustments & Application Considerations 4-11

EXAMPLE

Operation Procedure

In this example, configure the scaling upper- and Lower-Limits so that inputs
4…20 mA become 10.0%…95.0%.

1. Press the key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.19
Input type
in-t
0

2. Select Scaling Upper-Limit by pressing M.

Figure 4.20
Scaling upper
in-h limit
100

3. Press the U or D key to set the parameter to 950.

Figure 4.21

in-h
950

4. Select Scaling Lower-Limit by pressing M.

Figure 4.22
Scaling lower
in-l limit
0
5. Press the U or D key to set the parameter to 100.

Figure 4.23

in-l
100

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4-12 Parameter Adjustments & Application Considerations

6. Select the decimal point position by pressing M.

Figure 4.24 — Press the U or D key to set the parameter to 1.

Decimal point
dp
0
Figure 4.25

dp
1

7. To return to the Operation function group press the key for at least
1 second.

Note: The newly configured value or parameter is loaded into controller

memory if you do NOT operate any key on the front panel for at least
2 seconds or by pressing the or M key.

Executing the Heating and Overview

Cooling Control Mode
Several forms/modes of heating, cooling, or heating and cooling control can
be used with Bulletin 900 controllers. The heating and cooling control mode
operates when h-c: heating and cooling is selected in the Standard/Heating
and Cooling parameter (Initial Setting function group). To assign the function
of your outputs and alarms based on the control mode use the Control Output
X Assignment and Alarm Y Assignment parameters in the Advanced Settings
function group. Refer to the table below

The following functions are assigned to outputs in the initial status.

Table 4.B — Output and Alarm Assignments

Parameter Name Symbol Initial Status
Control Output 1 Assignment out1 Control output for heating
Control Output 2 Assignment (900-TC8 & 900-TC16 only) out2 Not assigned
Auxiliary Output 1 Assignment sub1 Alarm 1
Auxiliary Output 2 Assignment (900-TC8 & 900-TC16 only) sub2 Alarm 2
Auxiliary Output 3 Assignment (900-TC8 only) sub3 Alarm 3
Each output assignment is automatically initialized as shown below when the control module is changed.

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 Parameter Adjustments & Application Considerations 4-13

Table 4.C — Example: 900-TC8 & 900-TC16

Without Control Output 2 With Control Output 2
Parameter Name Symbol Standard Heating/Cooling Standard Heating/Cooling
Control Output 1 out1 Control Output Control Output Control Output Control Output
Assignment (heating) (heating) (heating) (heating)
Control Output 2 out2 Not assigned ➊ Not assigned ➊ Not assigned Not assigned
Assignment
Auxiliary Output 1 sub1 Alarm 1 ➋ Alarm 1➋ Alarm 1 ➋ Alarm 1➋
Assignment
Auxiliary Output 2 sub2 Alarm 2 ➌ Control Output Alarm 2 Alarm 2
Assignment (cooling) ➌
➊No parameter assignment is displayed because there is no control output
➋The output set for the Auxiliary Output 1 Assignment parameter becomes the program END output unless the program pattern is OFF.
➌ For the 900-TC8, the Auxiliary Output 3 Assignment parameter is set for control output (cooling) (the Auxiliary Output 2 Assignment parameter is set for alarm 2).
• The heating/cooling operation of the control outputs will switch when the Direct/Reverse Operation parameter is set to “direct.”
• When DRS (Invert Direct/Reverse Operation) is assigned for an Event Input Assignment (1 or 2), control will start with the contents set for the Direct/Reverse Operation
parameter inverted when the event input turns ON, and with the contents left according to the setting when the event
input turns OFF. For details on event inputs and control combined with the Direct/Reverse Operation parameter, refer to Control by Inverting Direct/ Reverse Operation.
This function is not supported by 900-TC32.
• When heating/cooling control is selected, the Dead Band and Cooling Coefficient parameters can be used.

Table 4.D — Example: 900-TC32

Parameter Name Symbol Standard Heating/Cooling
Control Output 1 Assignment out1 Control output (heating) Control output (heating)
Aux1 Output 1 Assignment sub2 Alarm 1➊ Control output (cooling)
➊ The Auxiliary Output 1 Assignment parameter becomes the program end output unless the Program Pattern parameter is configured to OFF.

Dead Band (Heating and Cooling Control)

When the heating and cooling control mode is selected, the Dead Band
parameter can be used. The dead band is configured with the set point as its
center (refer to Figure 4.26). The dead band width is the configured value of
the Dead Band parameter (Adjustment function group). Setting a negative
value produces an overlap band. If an overlap band is configured the bumpless
function may not operate when switching between automatic and manual
operation.

Note: The default is 0.0 EU for controllers with temperature inputs and
0.00% full scale for controllers with analog inputs.

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Figure 4.26 — Dead Band

Dead band: Overlap band:
Output dead band width = positive Output dead band width = negative

Heating side Cooling side Heating side Cooling side

PV PV
Set point Set point

Cooling Coefficient (Heating and Cooling Control)

When the heating and cooling control mode and PID control method are
selected, the Cooling Coefficient parameter can be used. If the heating and
cooling functional characteristics of the control target greatly differ, this could
limit satisfactory control performance from being obtained by the same PID
values. To reduce the possibility of this occurring, adjust the proportional band
(P) at the cooling side of the set point using the cooling coefficient to balance
control between the heating and cooling sides. In heating and cooling control
the proportional band, (P) at the heating or cooling side is calculated by the
following formula:

P for control output assigned to heating side = P

P for control output assigned to cooling side = P for control output

assigned to heating side × cooling coefficient

The cooling coefficient is multiplied by the P for the control output assigned
to the heating side to obtain control with characteristics that differ from those
of the control output assigned to the heating side.

Figure 4.27

Output Output
P for control output
P for control output assigned to heat-
assigned to heat- ing side × 1.0
ing side × 1.0
P for control output P for control output P for control output P for control output
assigned to heating side assigned to cooling side assigned to heating side assigned to cooling side
PV PV
0 0
Set point
P for control output assigned to P for control output assigned to
heating side × 0.8 heating side × 1.5

Automatic Cooling Coefficient Adjustment

By executing AT during heating/cooling control, the cooling coefficient can

be automatically calculated along with the PID parameters.

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Table 4.E
Parameter Name Setting Range Default
Automatic Cooling OFF: Disabled, ON: OFF
Coefficient Adjustment Enabled

Note: If there is strong non-linear gain for the cooling characteristics, such as
when cooling water boils for cooling control, it may not be possible to
obtain the optimum cooling coefficient at the Controller, and control
may take the form of oscillating waves. If that occurs, increase the
proportional band or the cooling coefficient to improve control.

Setup of Heating and Cooling

To configure the heating and cooling control mode, either set the Standard
parameter or Heating and Cooling, Dead Band, and Cooling Coefficient (when
using the PID method) parameters.

EXAMPLE

Operation Procedure: Heating and Cooling Control Selection

Standard or Heating and Cooling = Heating and Cooling

1. Press the key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.28
Standard or
s-hc heating/cooling
stnd

2. Select heating and cooling control in the Initial Setting function group.

stnd:: Standard control

h-c: Heating and cooling control

EXAMPLE

Operation Procedure: Configuring the Cooling Coefficient

Cooling coefficient = 10

1. Select Cooling Coefficient in the Adjustment function group. In this

example, set the parameter to 10.

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Figure 4.29
Cooling
c-sc coefficient
1.00

2. Press the U key to set the parameter to 10.00. The setting range is
0.01…99.99.

c-sc
10.00

EXAMPLE

Operation Procedure: Configuring the Dead Band

Dead Band = 5

1. Select Dead Band in the Adjustment function group.

Figure 4.30
C Dead band
c-db
0.0
2. Press the U key to set the parameter to 5.0. The setting range is
–199.9…+999.9.

Figure 4.31
C
c-db
5.0

Using the Event Input Overview

Feature — 900-TC8 &
900-TC16 When the appropriate option unit (refer to Tables 1.C and 1.E) is installed,
discrete (ON/OFF) inputs can be wired to the Bulletin 900 to cause the
controller to perform several pre-defined/configurable tasks. These inputs are
generically called event inputs.

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Setting Event Input

• Event inputs can be used for Multi-SP, RUN/STOP, Auto/Manual

Switch, Program Start, Invert Direct/Reverse Operation, 100% AT
Execute/Cancel, 40% AT Execute/Cancel, Setting Change
Enable/Disable, and Alarm Latch Cancel.

• Of these, only the number of event inputs (0 to 2) set in the Number of

Multi-SP Uses parameter (Initial Setting function group) are used for the
multi-SP function.

• Event inputs (1 and 2) that are not used for the multi-SP function are
assigned using the Event Input Assignment (1 and 2) parameters (Initial
Setting function group).

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• When using event inputs to switch the multi-SP, the event input
assignment display will not appear. Whether the set value and event
input assignments 1 and 2 will be displayed or hidden is shown in the
tables below.

• Do not connect the contacts from the same switch to more than one
900-TC Controller.

Table 4.F
Number of
Multi-SP Uses Event Input Assignment 1 Event Input Assignment 2
0 Displayed (Multi-SP not used)
1 Hidden (Multi-SP, 2 Points). Displayed (Event Input 2 not
used as Multi-SP Switch).
2 Hidden (Multi-SP, 4 Points).

Two set points are set externally by using the Number of Multi-SP Uses
parameter

• Switching is possible between two set points (0 and 1) by setting the

Number of Multi-SP Uses parameter to 1. The default setting is 1 and
does not need to be changed to switch between two set points. Set
points 0 and 1 are specified by the status of event input 1.

Figure 4.32 — Event Inputs

900-TC8 Event Inputs 900-TC16 Event Inputs

EV1 + − EV1
EV1
EV2 + A
EV1 EV2 +
EV2 EV2
− +

A DO NOT apply on external voltage source to the Event Input Terminals.

When you want to configure event inputs to change the controllers four
pre-set Set points, you must properly configure the Number of Multi-SP Uses
parameter. Two set points (0 or 1) can be selected when the Number of
Multi-SP Uses parameter is set to 1 (default). This setting need not be changed.
Set point 0 or 1 is specified by the ON/OFF state of Event
Input 1.

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Multi-SP

Selecting Multi-SP by Event Input

Multi-SP by event input is a function for setting the value of set points 0…3 in
advance, and selecting these set points by a combination of Event Inputs 1 and
2.

Multi-SP selection from external (event) inputs can be used when the proper
option event input unit is mounted in the Bulletin 900 and the Number of
Multi-SP Uses parameter is set to 1 or 2 (refer to Tables 4.G and 4.H).

Table 4.G — When Number of Multi-SP Uses Parameter is Set to 1

Event Input 1 Selected Set Point
OFF Use Set Point 0
ON Use Set Point 1

Table 4.H —When Number of Multi-SP Uses Parameter is Set to 2

Event Input 1 Event Input 2 Selected Set Point
OFF OFF Use Set Point 0
ON OFF Use Set Point 1
OFF ON Use Set Point 2
ON ON Use Set Point 3

Note: In order for the controller to begin the multi-set point function, the
physical input must be ON for 50 ms minimum.

Selecting Multi-SP by Keypad Operation

You can select Set Points 0…3 from the controller keypad by properly
configuring the value of the Multi-SP Uses parameter. in the adjustment
function group.To change set points from the controller keypad, the multi-SP
conditions are as follows.

When the option event input unit is:

• When the option event input unit is NOT mounted in the Bulletin 900,
and Multi-SP is configured to ON.

• When the option event input unit is mounted in the Bulletin 900, the
Number of Multi-SP Uses parameter is configured to 0 and the
Multi-SP parameter is configured to ON.

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The following table shows the relationship between the Multi-SP Uses
parameter value and the selected set point.

Table 4.I
Multi-SP Uses Parameter Value Selected Set Point
0 Select Set Point 0 value
1 Select Set Point 1 value
2 Select Set Point 2 value
3 Select Set Point 3 value

Note: The set point can also be switched using PC communications. This is
supported by 900-TC8, 900-TC16, and 900-TC32.

Multi-SP Setup

EXAMPLE

Operation Procedure: To Select Set Points (0/1/2/3)

The following example configures the Number of Multi-SP Uses parameter to

2 (Multi-SP, 4 points). Refer to Table 4.I.

Before you configure the Number of Multi-SP Uses parameter, you must first
cancel protection from the Advanced Setting function group. For additional
details on how to cancel key protection, refer to page 4-33, Using the Key Protect
Function Group.

1. Press the key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.33
C PV/SP
25
100

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 Parameter Adjustments & Application Considerations 4-21

2. Select Move to Advanced Setting function group by pressing the M key.

Figure 4.34
Input type
in-t
5

3. Press the D key to enter the password (–169) to cancel protection. You
can now move to the Advanced Setting function group by pressing the
M key or leaving the setting for at least 2 seconds.

Figure 4.35

amov
-169
Figure 4.36
Parameter
init initialization
off

4. Select Number of Multi-SP Uses parameter by pressing the M key.

Figure 4.37
Number of
ev-m multi-SP uses
1

5. Press the U key to set the parameter to 2. This allows set point change
from event input (refer to Table 4.F).

Figure 4.38

ev-m
2

6. To return to the Initial Setting function group press the key for at
least 1 second.

7. To return to the Operation function group press the key for at least
1 second.

Set Points 0, 1, 2, and 3 are selected according to the ON/OFF states of Event
Inputs 1 and 2.

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Figure 4.39 —Event Inputs

900-TC8 900-TC16

− EV1 EV1 + EV1

EV1 EV2 + EV2 + EV2
EV2
+ −

Note: Do not apply an external voltage source to the Event Input Terminals.

Operation Commands Other than Multi-SP

The following table shows the functions assigned when an Event Input
Assignment (1 or 2) is displayed.

Table 4.J — When Event Input Assignment (1 or 2) is Displayed

Setting Function
none None
stop R RUN/STOP
manu Auto/Manual
prst Program Start (See note 1.)
drs Invert Direct/Reverse Operation
at-2 100% AT Execute/Cancel
at-1 40% AT Execute/Cancel (See note 2.)
wtpt Setting Change Enable/Disable
lat Alarm Latch Cancel

Note (1) PRST (Program Start) can be set even when the Program Pattern parameter is set to OFF, but the function
will be disabled.
(2) This function can be set for heating/cooling control, but the function will be disabled.

When any of the following functions are set for an Event Input Assignment
parameter, the same function cannot be set for another Event Input
Assignment parameter: STOP (RUN/STOP), MANU (Auto/Manual Switch),
PRST (Program Start), DRS (Invert Direct/Reverse Operation), AT-2 (100%
AT Execute/Cancel), AT-1 (40% AT Execute/Cancel), WTPT (Setting
Change Enable/Disable), or LAT (Alarm Latch Cancel). Turn event inputs
ON and OFF while the power is being supplied. Event input ON/OFF
changes are detected for inputs of 50 ms or longer. (However, inputs of 250
ms or longer is determined using logic operations.)

The functions are described in detail below. Event inputs 1 and 2 are taken as
examples.

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Executing RUN/STOP Controller Mode Change

When the Event Input Assignment 1 or Event Input Assignment 2 parameter

is set to STOP (RUN/STOP), control is started (RUN) when event input 1 or
2 is OFF. Control is stopped when 1 or 2 is ON (refer to Table 4.K). While
control is stopped, the controller’s STP (stop) LED lights. Alarm outputs will
operate according to the selected value(s).

Table 4.K
Setting Input Contact Controller Mode
Event Input 1 or 2 ON STOP
Event Input 1 or 2 OFF RUN

Note: The Multi-SP Uses parameter must be configured to 0 or 1 for

RUN/STOP control by event inputs to function (refer to Table 4.F).

Switching Between Auto and Manual Control

When the Event Input Assignment 1 or Event Input Assignment 2 parameter

is set to MANU (auto/manual), manual control will start when Event Input 1
or 2 turns ON. Auto control will start when the input turns OFF.

The MANU indicator will light during manual control.

Table 4.L
Setting Input Contact Control Mode
Event Input 1 or 2 OFF Automatic
Event Input 1 or 2 ON Manual

Controlling the Start of the Simple Program Function

When the Event Input Assignment 1 or Event Input Assignment 2 parameter

is set to PRST (program start), the simple program will start when event input
1 or 2 turns ON. The program will be reset when the input turns OFF and the
RUN/STOP status will automatically switch to STOP mode. If the program
END output is ON, the program END output will turn OFF.

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Table 4.M
Setting Input Contact Program Status
Event Input 1 or 2 OFF reset
Event Input 1 or 2 ON Start

Control by Inverting Direct/Reverse Operation

When DRS (Invert Direct/Reverse Operation) is set for the Event Input
Assignment 1 or Event Input Assignment 2 parameter and the Direct/Reverse
Operation parameter is set for reverse operation, control starts with direct
operation (cooling control) when event input 1 or 2 turns ON and control
starts with reverse operation (heating control) when the event input turns
OFF.

Table 4.N
Input Direct/Reverse
Setting Contact Operation Parameter Status
Event OFF Direct operation (cooling) Direct operation (cooling)
Input 1 or
Reverse operation Reverse operation (heating)
2
(heating)
Event ON Direct operation (cooling) Reverse operation (heating)
Input 1 or
Reverse operation Direct operation (cooling)
2
(heating)

Switching 100% AT Execute/Cancel

When AT-2 (100% AT Execute/Cancel) is set for either the Event Input
Assignment 1 or Event Input Assignment 2 parameter, 100% AT will be
executed when event input 1 or 2 turns ON and will be cancelled when the
input turns OFF.

Table 4.O
Setting Input Contact Status
Event input 1 or 2 OFF 100% AT cancelled
Event input 1 0r 2 ON 100% AT executed

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Switching 40% ATExecute/Cancel

When AT-1 (40% AT Execute/Cancel) is set for either the Event Input
Assignment1 or Event Input Assignment 2 parameter, 40% AT will be
executed when event input 1 or 2 turns ON and will be cancelled when the
input turns OFF

Table 4.P
Setting Input Status
Event Input 1 or 2 OFF 40% AT cancelled
Event Input 1 or 2 ON 40% AT executed

Switching Setting Change Enable/Disable

When WTPT (Setting Change Enable/Disable) is set for either the Event
Input Assignment 1 or Event Input Assignment 2 parameter, the setting
change will be disabled when event input 1 or 2 turns ON and will be enabled
when the input turns OFF.

Table 4.Q
Setting Input Contact Status
Event input 1 or 2 OFF Enabled
Event input 1 or 2 ON Disabled

Switching Alarm Latch Cancel

When LAT (Alarm Latch Cancel) is set for either the Event Input Assignment
1or Event Input Assignment 2 parameter, all alarm latches (alarms 1 to 3,
heater burnout, HS alarm, and heater over-current latch) will be cancelled
when event input 1 or 2 turns ON.

Table 4.R
Setting Input Contact Status
Event input 1 or 2 OFF ---
Event input 1 or 2 ON Cancelled

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Parameters

Table 4.S
Symbol Parameter: Level Description
eV-1 Event Input Assignment 1: Initial Function of event input function
Setting function group
eV-2 Event Input Assignment 2: Initial
Setting function group
eV-m Number of Multi-SP Uses: Initial
Setting function group

Configuring the SP Upper- Set Point Limiter

and Lower-Limit Values
The maximum allowable configuration range of the set point is limited by the
set point limiter parameter. The set point limiter is used to prevent someone
from configuring the set point to some value outside the maximum range
called for by the application, thereby preventing the control target from
reaching an abnormal temperature. The upper- and lower-limit values of the
set point limiter are configured from the Set Point Upper-Limit and Set Point
Lower-Limit parameters in the Initial Setting function group, respectively.

Figure 4.40
Sensor range
Set point limitter
Setting range Set point
Changed to the A B
new upper limit x
value
Changed to upper
limit value Set point
C
Input type changed
Set point
Set point Upper- and lower-limit values of the limitter B
Sensor upper- and lower-limit values (setting possible)
x (setting not possible)

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Application Considerations

If a change is made to the set point upper and/or lower-limit value with
the current set point outside the limiter range, the set point is forcibly
changed by the controller to the sensor’s upper SP limit or lower SP
limit value, whichever is closer.

When the Input Type or temperature units are changed, the set point
limiter is forcibly reset to that of the new sensor setting range.

Table 4.T — Parameters

Symbol Parameters: Function group Description
sl-h Set Point Upper-Limit: Initial Setting function For limiting the SP
group setting
sl-l Set Point Lower-Limit: Initial Setting function
group

Set Point Limit Setup

To configure the Set Point Upper- and Lower-Limit parameters, you must
be in the Initial Setting function group. This example describes how to
configure the set point limiter when using a type K thermocouple (normal
full range: –200…1300°C).

Figure 4.41
-200 1300
Normal/Full Sensor range (Type K thermocouple)

Set point limitter range

-100 1000

EXAMPLE

Operation Procedure: Configuring the Set Point Upper-Limit

Configure the Set Point Upper-Limit Value to 1000

1. Press the key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

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Figure 4.42
Input type
in-t
5

2. Select Set Point Upper-Limit parameter by using the M key.

Figure 4.43
C Set point upper-
sl-h limit
1300

3. Press the U or D key to set the value to 1000.

EXAMPLE

Operation Procedure: Configuring the Set Point Lower-Limit

C
sl-h
1000
Configure the Set Point Lower-Limit Value to –100.

1. Select Set Point Lower-Limit parameter in the Initial Setting function

group by using the M key.

Figure 4.44
C Set point lower
sl-l limit
-200
2. Press the U or D key to set the value to –100.

Figure 4.45
C
sl-l
-100

Note: The newly configured value or parameter is loaded into the controller
memory if you do NOT operate any key on the front panel for at least
2 seconds or by pressing the or M key.

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Executing the SP Ramp SP Ramp

Function to Limit the SP
Rate of Change With the SP ramp function, the controller can limit the rate at which a change
in the set point will impact the control according to the user-defined SP ramp
value. The time interval in seconds/minutes which the set point is limited is
referred to as the SP ramp.

Figure 4.46
SP

SP ramp
SP after change

SP ramp value

Time unit of ramp rate (s/min.)

SP before change Time

Change point

The maximum allowed rate of change during SP ramp is specified by the SP

Ramp Set Value and SP Ramp Time Unit parameters.

Note: When the SP Ramp Set Value is OFF (default), the SP ramp function is
disabled.

Changing the ramp set point can be monitored in the Set Point during SP
Ramp parameter (Operation function group). Use this parameter when
monitoring the SP ramp.

Operation of the SP ramp function is also the same during switching of the set
points by the Multi-SP parameter.

Table 4.U
Symbol Parameter: Function Group Description
ol-h MV Upper-Limit: Adjustment function group To limit the manipulated variable
ol-l MV Lower-Limit: Adjustment function group To limit the manipulated variable
sl-h Set Point Upper-Limit: Initial Setting function group To limit the SP setting
sl-l Set Point Lower-Limit: Initial Setting function group To limit the SP setting
sprt SP Ramp Set Value: Adjustment function group To limit the SP rate of change
spru SP Ramp Time Unit: Advanced Setting function group Unit for setting the SP
alsp Alarm SP Selection: Advanced Setting function group Alarm SP selection

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SP Ramp Application Considerations

SP Ramp Operation at Startup

If the SP ramp function is enabled when the Bulletin 900 controller is turned
ON, or when RUN is switched to from STOP, the process value (PV) may
reach the Set Point SP ramp value in the same way as when the set point is
changed. In this case, operation is carried out by the controller with the
process value regarded as the set point before the change was made.

The direction the SP ramp changes is according to the relationship between

the process value and the set point (refer to Figure 4.47).

Figure 4.47
PV < SP PV > SP
SP SP
SP ramp
SP ramp
Set point PV Same
change rate

Set point

PV
Time Time
Power ON Power ON

Restrictions During SP Ramp Operation

Auto-tuning execution starts after the end of SP ramp.

When control is stopped or an error occurs, the SP ramp function is disabled.

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 Parameter Adjustments & Application Considerations 4-31

Alarms During SP Ramp Operation

The operation of alarms during SP ramp operation depends on whether

alarms are configured to be based on the ramp set point or the target set point
(refer to the Figure 4.48). The set point to be used is configured in the Alarm
SP Selection parameter.

Figure 4.48
Alarm SP Selection = Ramp SP (Alarm Type: 1 (Upper/Lower Limits))

Temperature

Alarm output ON

Alarm output ON

Time

Alarm SP Selection = Target SP (Alarm Type: 1 (Upper/Lower Limits))

Temperature

Alarm output ON

Alarm output ON

Time

To Move to the Advanced By default, the Advanced Setting function group is protected and you cannot
directly move to this function group. To move to this function group you must
Setting Function Group first cancel the protection applied by the Protect function group in the Initial
Setting/Communications Protect parameter. Refer to page 4-33, Using the Key
Protect Function Group.

EXAMPLE

Operation Procedure: To Remove Protection and Move to the Advanced

Setting Function Group

1. Press the and M keys simultaneously for at least 3 seconds in the

Operation function group.

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4-32 Parameter Adjustments & Application Considerations

2. The controller moves to the Protect function group, and

Operation/Adjustment Protection is displayed.

Figure 4.49
Operation/adjust-
oapt ment protect
0

3. Press the M key once to move to Initial Setting/Communications

Protection.

Figure 4.50
Initial setting/
icpt communica-
tions protect
1

4. Configure the programmed value to 0.

Figure 4.51

icpt
0

5. Press the and M keys simultaneously for at least 1 second to return

to the Operation function group.

Figure 4.52
C PV/SP
25
100

6. Press the key for at least 3 seconds to move to the Initial Setting
function group from the Operation function group.

Figure 4.53
Input type
in-t
5

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 Parameter Adjustments & Application Considerations 4-33

7. Select the Move to Advanced Setting function group parameter by

pressing the M key.

Figure 4.54
Move to ad-
amov vanced function
setting level
-169

8. Press the UD keys to enter the password (–169), and either press the
M key or leave the setting for at least 2 seconds to move to the
Advanced Setting function group from the Initial Setting function
group.

Figure 4.55
C PV/SP
25
100

9. To return to the initial setting function group, press the O key for at
least 1 second.

Figure 4.56
Move to
in-t Initial
Group
Setting
5

10. To return to the operation function group, press the O key for at least
1 second.

Figure 4.57
C Move to
25 Operation
Function
100
Group

Using the Key Protect Key Protect

Function Group
The Key Protect feature prevents some keypad functions from working. Four
different modes of protection are provided: Operation/Adjustment
protection, Initial Setting/Communications protection, Setting change
protection and PF Key protection.

The Key Protect feature restricts the type of parameters that can be used.

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4-34 Parameter Adjustments & Application Considerations

Operation/Adjustment Protection
To move to the Protect function group from the Operation or Adjustment
function groups, press the O and M keys simultaneously for at least
3 seconds.

Note: The key pressing time can be changed using the Move to Protect
function group time in the Advanced Settings function group.

After the time interval, the controller display will look as follows:

Figure 4.58

oapt
0

Table 4.V shows the relationship between configured/set values and the range
of protection.

When the Key Protect parameter is configured to 0, parameters are not

protected.

Note: The default is 0..

Table 4.V — Relationship Between Configured/Set Values & Range of Protection

Set Value
Level 0 1 2 3
Operation Group PV Can be displayed Can be displayed Can be displayed Can be displayed
PV/SP Can be displayed Can be displayed Can be displayed Can be displayed
and changed and changed and changed
Others Can be displayed Can be displayed Cannot be Cannot be
and changed and changed displayed and displayed and
moving to other moving to other
groups is not groups is not
possible. possible.
Adjustment Group Can be displayed Cannot be Cannot be Cannot be
and changed displayed and displayed and displayed and
moving to other moving to other moving to other
groups is not groups is not groups is not
possible. possible. possible.

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 Parameter Adjustments & Application Considerations 4-35

Initial Setting/Communications Protection

This portion of the Key Protect function group restricts movement by keypad
operation to the Initial Setting function group, Communications Setting
function group, and Advanced Setting function group (refer to Table 4.W).

Figure 4.59

icpt
1
Table 4.W — Initial Setting/Communications Protection
Function Group
Communications
Set Value Initial Setting Setting Advanced Setting
0 Possible to reach Possible to reach Possible to reach
1➊ Possible to reach Possible to reach Not possible to reach
2 Not possible to Not possible to reach Not possible to reach
reach
➊Default

Setting Change Protection

This portion of the Protect group protects controller setup from being
changed by operating the keys on the front panel.

Figure 4.60

wtpt
off
• The all protect indication ( ) will light when Setting Change Protect
is configured to ON.
Table 4.X

Configured Value Description

OFF ➊ Setup can be changed by key operation.
ON Setup cannot be changed by key operation. (The
Protect function group can be changed.)
➊Default

The all protect indication ( ) will light when Setting Change protect
is configured.

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4-36 Parameter Adjustments & Application Considerations

PF Key Protect

pfpt
off
Table 4.Y
Set Value Description
OFF➊ PF Key enabled
ON PF Key disabled (Operation as function key prohibited).
➊Default

Entering the Password to Move to the Protect Function Group

For additional system security, you can configure your controller so that you
need to enter a user-defined Password to Move to the Protect function group.
This user-defined password is configured using the Password to Move to
Protect function group parameter located in the Protect function group. If a
password is configured, before you can move to the Protect function group
you must enter the previously configured password when the Move to Protect
function group parameter is displayed. If no password is configured
(configured to 0) the Move to Protect function group parameter will not be
displayed and the Protect function group can be moved to directly without
entering a password.

Setting the Password

EXAMPLE

Operating Procedure: To Configure the Password to 1234

Use the following procedure to configure the Password to Move to the Protect
function group.

Figure 4.61
C PV/SP
25
100

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 Parameter Adjustments & Application Considerations 4-37

1. Press the O and M keys simultaneously for at least the time configured
in the Move to Protect function group time parameter to move from the
Operation function group to the Protect function group.

Figure 4.62
Operation/adjust-
oapt ment protection
0

2. Select the Password to Move to Protect function group parameter by

pressing the M key.

Figure 4.63
Password to
prlp move to protect
function group
0

3. Press the O and U keys to set the parameter to 1234.

(To prevent configuring the password incorrectly, the U and O keys or
D and O keys must be pressed simultaneously to set the password.)

Figure 4.64

prlp
1234

Note: Protection cannot be cleared or changed without the password. Be

careful not to forget it.

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4-38 Parameter Adjustments & Application Considerations

EXAMPLE

Operating Procedure: To Move to the Protect Function Group With a

Password of 1234

Use the following procedure to move to the Protect function group.

Figure 4.65
C PV/SP
25
100

1. Press the O and M keys simultaneously for at least the time

configured in the Move to Protect function group time parameter to
move from the Operation function group to the Protect function group.

Figure 4.66

pmov
0

2. Press the U key to configure the parameter to 1234 (password input).

Figure 4.67

pmov
1234

3. Move to the Operation/Adjustment Protect parameter by pressing the

O or M key or leaving the setting for at least 2 seconds.

Figure 4.68
Operation/adjust-
oapt ment protect
0

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 Parameter Adjustments & Application Considerations 4-39

EXAMPLE

Operating Procedure: With No Password Set

Figure 4.69
C PV/SP
25
100
1. Press the O and M keys simultaneously for at least the time
configured in the Operation/Adjustment Protect parameter to move
from the Operation function group to the Protect function group.

When a password is not configured, the Operation/Adjustment Protect

parameter will be displayed.

Figure 4.70

oapt
Operation/adjustment protect

Communications Operation Command to Move to the Protect function group

The Write Variable operation command can be used via communications to

write the password to the Move to Protect function group parameter. When
the correct password is written, the display will change to the Operation/
Adjustment Protect parameter and writing the parameters in the Protect
function group will be enabled.

Note: If the Write Variable operation command is used to write the wrong
password to the Move to Protect function group parameter after the
correct parameter has been written, the Move to Protect function group
parameter will be displayed and any Write Variable operation
commands to write parameters in the protect function group will result
in operation errors.

Note: If a password is not configured or if it is configured to 0, the display will

change to the Operation/Adjustment Protect parameter and writing the
parameters in the Protect function group will be enabled immediately.

PV Color Change PV Color Change Function

Use the PV color change function to configure the color of the PV display
(No. 1 display).

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There are three display colors, orange, red, and green, and you can select from
the following three modes and eight functions.

Figure 4.71

colr PV change
color

• Constant: This mode displays orange, red, or green all the time.

• Linked to Alarm 1: This mode switches the PV display color from red
to green when Alarm 1 turns ON or from green to red when Alarm 1
turns ON.

• Linked to PV stable band: This mode switches the PV display color

between red outside the PV stable band and green within PV stable
band, or between green outside the PV stable band and red within PV
stable band.
Set the PV stable band in the PV Stable Band parameter (Advanced
Setting function group).

• Default: The default is red (red).

The following table shows the display functions that can be configured using
the PV color change function.

Table 4.Z
Mode Setting Function PV Color Change Application Example
Constant org Orange Constant: Orange To match the display color with
other Controller models
red Red Constant: Red To match the display color with
other Controller models
grn Green Constant: Green To match the display color with
other Controller models
Linked to Alarm
Alarm 1 value
ALM1 lit

PV
SP

ALM1 not Lit ALM1 Lit Application Example

r-g Red to Green Red Green To display the PV reached
signal
g-r Green to Red Green Red To display error signals

Note: Shading indicates default setting.

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 Parameter Adjustments & Application Considerations 4-41

Table 4.S (Continued)

Mode Setting Function PV Color Change Application Example

Linked to PV PV
PV Stable stable stable
Band band band

Low Within High

PV
SP

Low Within PV stable High Application example

band
r-g.r Red to Green to Red Green Red To display stable status
Red
g-o.r Green to Orange Green Orange Red To display stable status
to Red
o-g.r Orange to Green Orange Green Red To display stable status
to Red

Link to PV Stable Band

Figure 4.72

pv-b PV stable
band

When the mode to link to the PV stable band is selected per Table 4.Z, the PV
display color will change according to whether the present value (PV) is lower
than, within, or higher than the PV stable band shown in Figure 4.73. The
width of the PV stable band is configured with the SP as the center, as shown
below.

Figure 4.73
PV stable PV stable
band band

Low Within High

PV
SP

The default band width is 5.0 (°C/°F) for controllers with

Thermocouple/Resistance Thermometer Multi-Inputs and 5.0% FS for
Controllers with Analog Inputs.

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Setting

Configuring the PV Color Change to Indicate Stable Status

To display the PV as a constant green color (to indicated a stable condition)

display when the PV is within ±15.0°C of the set point, configure the PV
Color Change and PV Stable Band parameters.

PV Color Change = r-gr (Red to Green to Red)

EXAMPLE
PV Stable Band = 15.0°C

Operating Procedure

Note: Make sure you release the protection to Move to the Advanced Setting
function group before you configure the PV Color Change and PV
Stable Band parameters since both parameters are located in the
Advanced Setting function group. (Refer to steps 1…8 on page 4-31.)

Figure 4.74

25
C PV/SP

100

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.75

in-t
Input type

2. Select the Move to Advanced Setting function group parameter by

pressing the M key.

Figure 4.76

amov
Move to advanced function setting level

-169

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 Parameter Adjustments & Application Considerations 4-43

3. Use the D key to enter −169 (the password).

Move to the Advanced Setting function group by pressing the M key or
leaving the setting for at least 2 seconds.

Figure 4.77
Parameter
init initialization
off

4. Select the PV Color Change parameter by pressing the M key.

Figure 4.78
PV change
colr color
red
5. Press the U key to set the parameter to r-gr.

Figure 4.79

colr
r-g.r

6. Select the PV Stable Band parameter by pressing the M key.

Figure 4.80
C PV stable band
pv-b
5.0

7. Use the U key to set the parameter to 15.0.

Figure 4.81
C
pv-b
15.0
8. To return to the Initial Setting function group, press the O key for at
least 1 second.

9. To return to the Operation function group, press the O key for at least
1 second.

Figure 4.82
C PV/SP
25
100

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Alarm Delays Alarm Delays

For 900-TC8 and 900-TC16, ON and OFF timed delays can be configured for
the Alarm Outputs 1, 2, and 3. For 900-TC32, ON and OFF timed delays can
be configured for the Alarm Output 1.The ON and OFF delay for Alarm 1
operate only for the alarm process function. If Alarm Output 1 is configured
as an OR with other alarm functions (i.e., the Heater Burnout Alarm, HS
Alarm, or input error output alarm), the time delay feature will not function
for the other alarms. The ON and OFF delays for alarms 1, 2, and 3 also apply
to the individual SUB1, SUB2, and SUB3 indicators and to communications
status. The alarm ON delays will also function when power is turned ON or
when moving from the Initial Setting function group to Operation function
group (i.e., to software resets). All outputs will turn OFF and the OFF delays
will not function when moving to the Initial Setting function group or when an
alarm is output for an A/D converter error.

Operation of Alarm ON and OFF Timed Delays (for an Upper-limit Alarm)

Figure 4.83
Alarm ON Condition
PV

Alarm hysteresis
Alarm setting

ON delay
set time
Alarm status OFF delay
set time

Alarm Latch = OFF

ON delay set time

Alarm will not turn ON.

• The alarm will not turn ON if the time that the alarm is ON is equal to
or less than the configured ON delay configured time. Also, the alarm
will not turn OFF if the time that the alarm is OFF is equal to or less
than the OFF delay configured time.
• If an alarm turns OFF and then back ON during the ON delay time, the
time will be reset from the last time the alarm turns ON. Also, if an
alarm turns ON and then back OFF during the OFF delay time, the
time will be remeasured from the last time the alarm turns OFF.

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 Parameter Adjustments & Application Considerations 4-45

Parameters Related to Alarm Delays

Table 4.AA
Parameter Name Symbol Configurable Range
Alarm 1 ON delay a1on 0…999 (s)
Alarm 2 ON delay (900-TC8, 900-TC16) a2on 0…999 (s)
Alarm 3 ON delay (900-TC8) a3on 0…999 (s)
Alarm 1 OFF delay a1of 0…999 (s)
Alarm 2 OFF delay (900-TC8, 900-TC16) a2of 0…999 (s)
Alarm 3 OFF delay (900-TC8) a3of 0…999 (s)

Note: The default time values are 0 (i.e., the ON and OFF delays are disabled).

Note: The parameters are displayed when alarm functions are assigned and
when the alarm type is configured to any type but 0 (none).

EXAMPLE

Operating Procedure

The following example procedure shows how to configure ON and OFF delay
for Alarm Output 1.

An ON delay of 5 seconds and an OFF delay of 10 seconds will be configured.

Figure 4.84
C PV/SP
25
100
1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.85
Input type
in-t
5
2. Select the Move to Advanced Setting function group parameter by
pressing the M key.

Figure 4.86

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3. Press the D key to enter the password (−169) and move from the Initial
Setting function group to the Advanced Setting function group.

Figure 4.87
Parameter
init initialization
off
4. Press the M key to select the Alarm 1 ON Delay parameter.

Figure 4.88
Alarm 1 ON
a1on delay
0
5. Press the U key to set the parameter to 5.

Figure 4.89

a1on
5

6. Press the M key to select the Alarm 1 OFF Delay parameter.

Figure 4.90
Alarm 1 OFF
a1of delay
0
7. Press the U key to set the parameter to 10.

Figure 4.91

a1of
10
8. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group.

Figure 4.92
Input type
in-t
5

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 Parameter Adjustments & Application Considerations 4-47

9. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.

Figure 4.93
C PV/SP
25
100

Loop Break Alarm Loop Break Alarm (LBA)

With a Loop Break Alarm, there is assumed to be an error in the operation

control loop if the control deviation (SP − PV) is greater than the threshold
you configure in the LBA Level parameter and if the control deviation is not
reduced by at least the value you configure in the LBA Detection Band
parameter within the LBA Detection Time parameter.

Figure 4.94 provides an example of the operation of the Loop Break Alarm
detection and time operation.

Figure 4.94

LBA Level
Set point
LBA Level
LBA band LBA band

LBA band PV
LBA detec-
Area where LBA LBA detection LBA detection
tion time LBA detection time
is not detected time
time

PV

(2) (3) (4) (5) (6) (7)

(1) LBA OFF LBA ON LBA OFF LBA ON

If the control deviation is reduced in the area between 1 and 2 (i.e., the set
point is approached) and the amount the control deviation is reduced is at least
equal to the LBA Band, the Loop Break Alarm will remain OFF.

The process value is within the LBA Level between 3 and 4, and thus Loop
Break Alarm will not be detected. (The Loop Break Alarm will remain OFF.)

If the process value is outside the LBA Level between 4 and 5 and the control
deviation is not reduced by at least the LBA Band within the LBA Detection
Time, the Loop Break Alarm will turn ON.

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If the control deviation is reduced in the area between 5 and 6 (i.e., the set
point is approached) and the amount the control deviation is reduced is at least
equal to the LBA Band, the Loop Break Alarm will turn OFF.

If the control deviation is reduced in the area between 6 and 7 (i.e., the set
point is approached) and the amount the control deviation is reduced is less
than the LBA Band, the Loop Break Alarm will turn ON.

• If the LBA Detection Time, LBA Level, LBA Detection Band, and PID
settings are not appropriate, alarms may be detected inappropriately or
alarms may not be output when necessary.
• Loop break alarms may be detected if unexpectedly large process
disturbances occur continuously and a large deviation does not decrease.

• If a loop break occurs when the set point is near the ambient
temperature, the temperature deviation in a steady state may be less than
the LBA level, preventing detection of the loop break.

• If the set point is so high or low that it cannot be reached even with a
saturated manipulated variable, a temperature deviation may remain
even in a steady state and a loop break may be detected.

• Loop Break Detection in not possible if a fault occurs that causes an

increase in temperature while control is being applied to increase the
temperature (e.g., an SSR short-circuit fault).

• Loop Break Detection in not possible if a fault occurs that causes a

decrease in temperature while control is being applied to decrease the
temperature (e.g., a heater burnout fault).

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Parameters Related to Loop Break Alarms

Table 4.AB
Configurable Range Application
Parameter Name Symbol Sensor Type (Units) Considerations
LBA Detection Time lba 0…9999 (s) Setting 0 disables the LBA
function.
LBA Level lbal Controllers with 0.1…999.9 (°C/°F) ➊ Default: 8.0 (°C/°F)
Thermocouple and
Resistance Thermometer
(RTD) inputs
Controllers with Analog 0.01…99.99 (%FS) Default: 10.00% FS
Inputs
LBA Band lbab Controllers with 0.0…999.9 (°C/°F) ➊ Default: 3.0 (°C/°F)
Thermocouple and
Resistance Thermometer
(RTD) inputs
Controllers with Analog 0.00…99.99 (%FS) Default: 0.20% FS
Inputs

➊ Set NONE as the unit for analog inputs.

• A loop break alarm can be output by setting the Alarm 1 Type to 12

(LBA).

• A setting of 12 (LBA) can be configured for Alarm 2 or 3 but the setting

will be disabled.

• Loop breaks are not detected during SP Ramp operation.

• Loop breaks are not detected during Auto-Tuning, Manual operation, or

while the controller is stopped.

• If the Alarm 1 Latch parameter is configured to ON, the latch will be

effective for the loop break alarm.

Automatically Setting the LBA Detection Time

• The LBA Detection Time is automatically configured by Auto-Tuning.

(However, it is not configured automatically for heating/cooling
control.)

• If the optimum LBA Detection Time is NOT obtained by Auto-Tuning,

configure the LBA Detection Time parameter (Advance Setting
function group).

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Determining the LBA Detection Time

To manually configure the LBA detection time, configured the LBA Detection
Time parameter to twice the LBA reference time given in the example below.

EXAMPLE

Procedure

1. Set the output to the maximum value.

2. Measure the time required for the change in the input to reach the LBA
band.

Figure 4.95
Measurement time
Temperature Tm
PV

LBA band

MV = 100%

Time
LBA detection time = Tm × 2

3. Set the LBA Detection Time parameter to two times the measured time.

LBA Level

Configure the control deviation when the control loop is working properly.

The default is 8.0 (°C/°F) for Controllers with Thermocouple/Resistance

Thermometer Multi-Inputs and 10.00% FS for Controllers with Analog
Inputs.

LBA Band

There is assumed to be an error in the control loop if the control deviation is

greater than the threshold configured for the LBA Level parameter and if the
control deviation does not change by at least the value configured for the LBA
Band parameter.

The default is 3.0 (°C/°F) for Controllers with Thermocouple/Resistance

Thermometer Multi-Inputs and 0.20% FS for Controllers with Analog Inputs.

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 Parameter Adjustments & Application Considerations 4-51

EXAMPLE

Operating Procedure: Loop Break Alarm Configurations

In this example, the LBA Detection Time is configured to 10, the LBA Level is
configured to 8.0, and the LBA Band is configured to 3.0.

Figure 4.96
C PV/SP
25
100

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.97
Input type
in-t
5

2. Select the Alarm 1 Type parameter by pressing the M key.

Figure 4.98
Alarm 1 type
alt1
2

3. Press the U key to configure the Alarm 1 Type parameter value to 12.

Figure 4.99

alt1
12
4. Select the Move to Advanced Setting function group parameter by
pressing the M key.

Figure 4.100
Move to Advanced
amov Setting Function Group

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4-52 Parameter Adjustments & Application Considerations

5. Press the D key to enter the password (−169), and move from the
Initial Setting function group to the Advanced Setting function group.

Figure 4.101
Parameter
init initialization
off
6. Select the LBA Detection Time parameter by pressing the M key.

Figure 4.102
LBA detection
lba time
0

7. Press the U key to set the parameter to 10.

Figure 4.103
C
lba
10
8. Select the LBA Level parameter by pressing the M key.

Figure 4.104
C LBA level
lbal
8.0
9. Press the U key to set the parameter to 8.0. (Note: The default is 8.0.)

10. Select the LBA Band parameter by pressing the M key.

C
lbal
8.0

Figure 4.105
C LBA band
lbab
3.0
11. Press the U or D key to set the parameter to 3.0. (Note: The default is
3.0.)

Figure 4.106
C
lbab
3.0

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 Parameter Adjustments & Application Considerations 4-53

12. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group.

Figure 4.107
Input type
in-t
5

13. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.

Figure 4.108
C PV/SP
25
100

Performing Manual Control Manual Operation

You (the operator) can take manual control of the manipulated variable when
the PV/MV parameter is displayed in the Manual Control function group. The
final MV (Manipulated Variable) used in automatic mode will be used as the
initial manual MV when moving from automatic mode to manual mode. In
manual mode, the change value will be fixed immediately and reflected in the
actual MV (bumpless transfer).

• Manual operation can be used only for PID control.

• The automatic display return function will not operate in manual mode.

• Balanceless-bumpless operation will be performed for the MV when

switching from manual operation to automatic operation. (Refer to the
Note on page 4-53.)

• If a power interruption occurs during manual operation, manual

operation will be restarted when power is restored using the same MV as
when power was interrupted.

• Switching between automatic and manual operation is possible for a

maximum of one million times.

Note: In balanceless-bumpless operation, the MV before switching is used

initially after the switch and then gradually changed to achieve the
proper value after switch to prevent radical changes in the MV after
switching operation.

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The overall manual operation is illustrated in the following figure.

Figure 4.109 — Overall Manual Operation

MV (%)
Balanceless-bumpless

0 Time
MV switched OFF ON
Manual
Power in-
terrupted
Automatic

Table 4.AC —Related Displays and Parameters

Parameter Name Symbol Function Group Remarks
PV/MV (Manual MV) — Manual Control function group −5.0…105.0 (heating/cooling control:
−105.0…105.0)
Auto/Manual Switch a-m Operation function group Switches between automatic and manual modes.
Auto/Manual Select amad Advanced Setting function Enables switching between automatic and
Addition group manual modes.

Note: Refer to Output Adjustment Functions on page 4-75 for information on the
priority for the MV.

Manual MV Limit Enable

When the Manual MV Limit Enable parameter is configured to ON (enabled),

the MV limits will function and the setting range for the Manual MV
parameter will be between the MV upper limit and the MV lower limit. When
the parameter is configured to OFF (disabled), MV limits will not function.

Table 4.AD
Parameter Name Setting Range Default
Manual MV Limit Enable OFF: Disabled, ON: Enabled ON

Moving to the Manual Control function group (Refer to Figure 4.110)

In the Operation function group select the Auto/Manual parameter and then
press the O key for at least 3 seconds to switch to the manual mode and to

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 Parameter Adjustments & Application Considerations 4-55

display the Manual Control function group. It is not possible to move to any
displays except for the PV/MV parameter during manual operation. Press the
O key for at least 1 second from the PV/MV display in the Manual Control
function group to return to automatic mode and display the top parameter in
the Operation function group.

Note: To use the Manual Control mode, the Auto/Manual Select Addition
parameter must first be configured to ON in the Advanced Setting
function group (refer to Figure 4.115 on page 4-57).

Figure 4.110
Operation function group

C
Press O key for at least 1 s. 25 PV

M
C
25 PV/SP

Manual Control function group

100
M

C
25 a-m a-m Auto/manual switch

20
Press O key for at least
PV/MV 3 s.
M
a-m display flashes for
at least 1 s.
m-sp Multi-SP

0
M

For 900-TC8 and 900-TC16, if an event input is configured to MANU

(Auto/Manual), the Auto/Manual Switch parameter will not be displayed. Use
the event input to switch between automatic and manual modes.

Note: Even when controller operation is stopped, the manual control of the
MV is given priority over other functions.
Controller auto-tuning and self-tuning will stop when the Manual Mode
is entered.

Note: If the SP ramp function is operating, it will continue even when the
manual mode is entered.

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Using the PF Key to Move to the Manual Control Level

1. When the PF Setting parameter is configured to A-M (Auto/Manual),

pressing the PF Key for at least one second while in the adjustment or
operation group will change the mode to manual mode and move to the
manual control function group. During manual operation it is not
possible to move to any displays other than PV/MV (Manual MV).
Press the PF Key for at least one second from the PV/MV display in the
manual control mode to change the mode to automatic mode, move to
the operation function group, and display the top parameter in the
operation function group.

2. For 900-TC8 and 900-TC16, when MANU (Auto/Manual) is selected

for an event input, the Auto/Manual Switch parameter is not displayed.
In that case, switching between auto and manual mode is executed by
using an event input.

Auto/Manual Select Addition

The Auto/Manual Select Addition parameter must be configured to ON in the

Advance Setting function group before it is possible to move to manual mode.
The default is OFF.

Note: 1. Priority of Manual MV and Other Functions

Even when operation is stopped, the manual MV is given priority
over other functions. Auto-tuning and self-tuning will stop when
manual mode is entered.
Note: 2. Manual MV and SP Ramp
If operating, the SP ramp function will continue even when man-
ual mode is entered.

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EXAMPLE

Operating Procedure

Use the following procedure to set the manipulated variable in Manual mode.

Figure 4.111
C PV/SP
25
100

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.112
Input type
in-t
5
2. Select the PID ON/OFF parameter by pressing the M key and select
PID mode.

Figure 4.113

cntl
pid

3. Select the Move to Advanced Setting function group parameter by

pressing the M key.

Figure 4.114
Move to Advanced
amov Setting Function Group
0

Press the D key to enter the password (−169), and move from the Initial
Setting function group to the Advanced Setting function group.

Figure 4.115
Parameter
init initialization
off

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4. Select the Auto/Manual Select Addition parameter by pressing the M

key.

Figure 4.116
Auto/manual
amad select addition
off
5. Use the U key to set the parameter to ON.

Figure 4.117

amad
on
6. Press the O key for at least 1 second to move from the Advanced
Setting function group to the Initial Setting function group.

Figure 4.118
Input type
in-t
5
7. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.

8. Select the Auto/Manual Switch parameter by pressing the M key.

Figure 4.119
Auto/manual
a-m switch

9. Press the O key for at least 3 seconds to move from the Operation
function group to the Manual Control function group.

Figure 4.120
C PV/MV
25
0.0

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 Parameter Adjustments & Application Considerations 4-59

10. Press the U or D key to set the manual MV. (In this example, the MV
is configured to 500%.) Note: The manual MV setting must be fixed,
but values changed with key operations are reflected in the control
output immediately.

Figure 4.121
C
25
50.0
11. Press the O key for at least 1 second to move from the Manual
Control function group to the Operation function group.

Figure 4.122
C PV/SP
25
100

EXAMPLE

Auto/Manual Example Operating Procedure

In this example, A-M is configured for the PF Setting parameter (900-TC8

only).

1. Press the O Key for at least three seconds to move from the Operation
to the Initial Setting function group.

Figure 4.123 — Operation function group

C
25 alm

100
Figure 4.124 — Initial Setting function group

Input Type
in-t
5

2. Select the Move to Advanced Setting parameter by pressing the M Key.

Figure 4.125

cntl
pid

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3. Select the PID ON/OFF parameter by pressing the U Key.

Figure 4.126
Move to Advanced
amov Setting Group
0
4. Select the Move to Advanced Setting parameter by pressing the M Key

5. Press the D Key to enter the password (-169), and move from the
Initial Setting function group to the Advanced Setting function group.

Figure 4.127
Parameter
init Initialization
off

6. Select the Auto/Manual Select Addition parameter by pressing the M

Key.

Figure 4.128
Auto/Manual
amad Select Addition
off

7. Use the U Key to set the parameter to ON.

Figure 4.129

amad
on

8. Press the M Key to select the PF Setting parameter and confirm that it
is set to “A-M.” (“A-M” is the default setting.)

Figure 4.130

pf
a-m

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 Parameter Adjustments & Application Considerations 4-61

9. Press the O Key for at least one second to move from the Advanced
Setting function group to the Initial Setting function group.

Figure 4.131
Input Type
in-t
5
10. Press the O Key for at least one second to move from the Initial
Setting function group to the Operation function group.

11. Press the PF Key for at least one second to move from the Operation to
the Manual Control function group.

Figure 4.132
C PV/MV
25
0.0

12. Press the U or D Key to set the manual MV. (In this example, the MV
is set to 50.0%.)

Figure 4.133
C
25
50.0

Note: The manual MV setting must be saved, but values changed with key
operations are reflected in the control output immediately.

13. Press the PF Key to move from the Manual Control function group to
the Operation function group.

Figure 4.134
C
25 alm

100

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Using the Transfer Output Transfer Output Function

Fort 900-TC8 and 900-TC16, if a control 1 output is an analog linear current

output it can be used as a transfer output. To use the transfer output, configure
the Transfer Output Type parameter to any setting other than OFF (refer to
Table 4.AE).
When the Transfer Output Type parameter is configured to any setting other
than OFF, the Transfer Output Upper-Limit and Transfer Output
Lower-Limit parameters will be enabled.

Transfer Output Type

Table 4.AE — Using Transfer Input
Transfer Output Type Symbol Configurable Range
OFF ➊ off —
Set Point sp SP Lower-Limit to SP Upper-Limit
Set Point during SP sp-m SP Lower-Limit to SP Upper-Limit
ramp
PV pv Sensor setting range Lower-Limit to
Sensor setting range Upper-Limit or
Scaling Lower-Limit to Scaling
Upper-Limit
MV Monitor (heating) mv –5.0…105.0 (heating/cooling control:
0.0…105.0) ➋
MV Monitor (cooling) c-mv 0.0…105.0 ➋

➊ The default Transfer Output Type is OFF. If the Transfer Output Type is configured to OFF, the function assigned
in the Control Output 1 Assignment parameter will be output to Control Output 1.
➋ The difference between the transfer output value and the linear current output value is illustrated in the
following example and Figure 4.135.
If the linear output is used as the transfer output when the linear current output type is configured to 4…20
mA, 4.0 mA will be output for 0% and 20.0 mA will be output for 100%.
When a linear output is used for the control output, 3.7 mA is output for 0% and 20.3 mA is output for 100%
when the control output for heating is selected to ensure that the control object is controlled at 0% and 100%.
Figure 4.135 — When the Linear Current Output Type is Set to 4 to 20 mA

Output current (mA)

20.3
Transfer output value
20
Control output

4
3.7

0 MV (%)
100

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 Parameter Adjustments & Application Considerations 4-63

Transfer Output Scaling

• Reverse scaling is possible by configuring the Transfer Output

Lower-Limit parameter larger than the Transfer Output Upper-Limit
parameter. If the Transfer Output Lower-Limit and Transfer Output
Upper-Limit parameters are configured to the same value when 4…20
mA is configured, the transfer output will output continuously a 0% (4
mA) signal.

• If the SP, SP during SP ramp, or PV is selected as the Transfer Output

Type, the Transfer Output Lower-Limit and Transfer Output
Upper-Limit parameters will follow the values configured for the
respective parameter’s Upper- and Lower-Limits concerning changes in
the Upper- and Lower-Limits of the SP limiter and temperature units.

• If the MV for heating or MV for cooling is selected as the Transfer

Output Type, the Transfer Output Lower-Limit and Transfer Output
Upper-Limit parameters will be initialized to 100.0 and 0.0, respectively,
when a switch is made between standard control and heating/cooling
control using the Standard or Heating/Cooling parameter.

• When the linear current type is configured as 4…20 mA, the transfer
output Upper-Limit is configured to 90.0, and the transfer output
Lower-Limit is configured to 10.0 is shown in the following graph (refer
to Figure 4.136).

• For scaling from 0.0…100.0%, 0.0% will be the output for −5.0…0.0,
and 100% will be the output for 100.0…105.0.

Figure 4.136 — When the Linear Current Output Type is Set to 4 to 20 mA

Output current (mA)

20

MV (%)
0 10 90 100
Transfer output Transfer output
lower limit upper limit

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EXAMPLE

Operating Procedure

The following procedure configures the Transfer Output Type as a SP with a

range (limit) of −50…200.

Figure 4.137 — Operation function group

C PV/SP
25
100

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.138
Input type
in-t
5
2. Select the Transfer Output Type parameter by pressing the Key.

Figure 4.139
Transfer output
tr-t type
off
3. Press the U key to select sp (set point).

Figure 4.140

tr-t
sp
4. Select the Transfer Output Upper-Limit parameter by pressing the M
key.

Figure 4.141
C Transfer output
tr-h upper limit
1300

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 Parameter Adjustments & Application Considerations 4-65

5. Use the D key to set the parameter to 200. The default is 1300.

Figure 4.142
C
tr-h
200
6. Select the Transfer Output Lower-Limit parameter by pressing the M
key.

Figure 4.143
C Transfer output
tr-l lower limit
-200

7. Use the U key to set the parameter to −50. The default is −200.

Figure 4.144
C
tr-l
-50
8. To return to the Operation function group, press the O key for at least
1 second.

Figure 4.145
C PV/SP
25
100

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Using the Simple Program Simple Program Function

Function
The simple program function can be used to perform a simple one step ramp
and soak operation.

Figure 4.146
SP

Set point Wait band

Wait band

PV

Soak time END display

RSET → STRT
END output
Select either
STOP or RUN.

The simple program will start when the Program Start parameter is changed
from RSET to STRT. END will be displayed on the No. 2 display and the
output assigned as the program end output will turn ON after the time
configured in the Soak Time parameter has expired in the wait band. The
Program Pattern parameter can be used to select moving to STOP mode or
continuing operation in RUN mode after the program ends.

Table 4.AF —Parameters Related to the Simple Program Function

Display Function
Parameter Name Symbol Configurable (Monitor) Values Units Group
Program Pattern ptrn OFF, STOP, CONT — Initial Setting
Program Start prst RSET, STRT — Operation
Soak Time soak 1…9999 min or h Adjustment
Soak Time Unit t-u m (minutes)/h (hours) — Advanced Setting
Wait Band wt-b OFF or 0.1…999.9 ➊ °C or °F ➊ ➋ Adjustment
Soak Time Remain Monitor sktr 0…9999 min or h Operation

➊ The configurable units for the Wait Band parameter is %FS for Controllers with Analog Inputs and the range is
OFF or 0.01…99.99.
➋ Units configured for Controllers with Thermocouple/Resistance Thermometer Multi-inputs. Set NONE as the
unit for Controllers with Analog Inputs.

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Program Pattern

Either of two program patterns (STOP or Continue) can be selected. The

simple program operation will not be performed if the Program Pattern
parameter is configured to OFF.

Pattern 1 (STOP)

Control will stop and the STOP control mode will be entered when the simple
program has ended.

Figure 4.147

Wait band
Set point
Wait band

PV

RSET → STRT Soak time END display

END output
Automatically switches
from RUN to STOP control
mode.

Pattern 2 (CONT)

Control will continue in RUN control mode when the simple program has
ended.

Figure 4.148

Set point Wait band

Wait band

PV

RSET → STRT Soak time END display

END output
RUN mode continues.

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Starting Method

Any of the following three methods can be used to start the simple program.

• Setting the Program Start parameter to STRT.

• For 900-TC8 & 900-TC16: Turning ON an event input. (The program

start must be assigned to an event input. Refer to the Note on page
4-68.)

• Starting with an Operation Command using communications. (When

the program start is not assigned to an event input.)

Note: When an event input is used to start and reset the simple program,
writing is performed to EEPROM. Be sure to consider the write life (1
million writes) of the EEPROM in the system design. When the
program start is assigned to an event input, the Program Start
parameter will function as a monitor display, and the RSET/STRT
displays can be used to check when the event input has started or reset
the simple program. When this is done, the Program Start parameter
functions as a monitor display only and cannot be changed using key
operations. If the Program Pattern parameter is configured to OFF, the
event input assignment setting will be initialized to NONE.

Soak Time and Wait Band

Figure 4.149
Wait band

Set point

Wait band

PV

RSET → STRT
(1) (2) (3) (4) (5)

Soak time
remain

Set point Set point

The wait band is the fixed band within which the process value is stable in
respect to the set point. The soak time is measured within the wait band. The
timer that measures the soak time operates only when the process value is

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 Parameter Adjustments & Application Considerations 4-69

within the wait band around the set point (i.e., SP ± wait band). In the
pre-ceding diagram, the timer will be stopped between the start and (1), (2) and
(3), and (4) and (5) and will measure the time only between (1) and (2), (3) and
(4), and (5) and the end.

Note: If the wait band is configured to OFF, the wait band will be treated as
infinity and the timer will measure time continuously after changing
from RSET to STRT.

Operation at the Program End

Display at the Program End

When the program ends, the process value will be displayed on the No. 1
display (refer to Note below) and the set point and End will be alternately
displayed on the No. 2 display at 0.5 second intervals.

Note: One of the following displays: PV/SP, PV only, or PV/MV.

Figure 4.150

120.1 Displayed alternately.

end 120.0

Program End Output

In the case of 900-TC8 and 900-TC16, When the Program Pattern parameter
is changed from OFF to STOP or CONT, the Auxiliary Output1 Assignment
parameter will automatically be configured to the END output. When the
Program Pattern parameter is changed from STOP or CONT to OFF, the
Alarm 1 Output Assignment parameter will automatically be initialized to
ALM1. The output assignment parameters can also be used to assign the
program END output to any output.

In the case of 900-TC32, When the Program Pattern parameter is changed

from OFF to STOP or CONT for the 900-TC32, the Auxiliary Output 1
Assignment parameter will automatically be set to the END output. When the
Program Pattern parameter is changed from STOP or CONT to OFF, the
Alarm 1 Output Assignment parameter will automatically be initialized to
ALM1. When using heating/cooling control and the Program Pattern
parameter is changed from OFF to STOP or CONT, the END output will not
be assigned to an output. Use the output assignment parameters to assign the
program END output to the desired output.

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The program END output is also provided in communications status.

Clearing the Program End Status

The program END output and display will be cleared when the Program Start
parameter is changed from STRT to RSET. The setting is changed from STRT
to RSET while the Program Start parameter is displayed.

The program END status can also be cleared using an event input. If the
program start function is assigned to an event, however, the program end
status cannot be cleared from the Program Start parameter display, which will
function only as a monitor display.

EXAMPLE

Operating Procedure

Perform the following procedure to use the simple program function.

In this example, the program pattern will be configured to STOP, the soak
time to 10 min, and the wait band to 3.

Figure 4.151

Wait band = 3
Set point

PV

RSET → STRT Soak time = 10 min END display

STOP END output

Figure 4.152 —Operation function group

C PV/SP
25
100

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 Parameter Adjustments & Application Considerations 4-71

1. Press the O key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.153
Input type
in-t
5
2. Select the Program Pattern parameter by pressing the M key.

Figure 4.154
Program Pattern
ptrn
off
3. Use the U key to set the parameter to STOP.

Figure 4.155

ptrn
stop
4. Press the O key for at least 1 second to move from the Initial Setting
function group to the Operation function group.

Figure 4.156
C PV/SP
25
100
5. Press the O key to move from the Operation function group to the
Adjustment function group.

Figure 4.157
Adjustment
l.adj display
function group

6. Select the Soak Time parameter by pressing the M key.

Figure 4.158
Soak time
soak
1

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7. Use the U key to set the parameter to 10. (The soak time unit is
configured in Soak Time Unit parameter in the Advance Setting
function group. The default is m (minutes).

Figure 4.159

soak
10
8. Select the Wait Band parameter by pressing the M key.

Figure 4.160
Wait band
wt-b
off

9. Use the U key to set the parameter to 3.0.

Figure 4.161

wt-b
3.0
10. Press the O key to move from the Adjustment function group to the
Operation function group.

Figure 4.162
C PV/SP
25
100

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EXAMPLE

Using a Simple Program

The program will be started by changing the configuration of the Program

Start parameter. The following shows an example using a simple program with
the program pattern configured to STOP.

Figure 4.163

Wait band
Set point

PV
Soak time Soak time Soak time

END display
END output

RUN STOP RUN

RUN/STOP
status

STRT RSET STRT RSET

STRT
Program
start

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

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Table 4.AG
Timing Description
(1) The Program Start parameter was changed from RSET to STRT using either an event or key operations.
The RUN/STOP status automatically changes to RUN mode when the above operation is performed.
(2) The Program Start parameter was changed from STRT to RSET using either an event or key operations before
the soak time expired.
The RUN/STOP status automatically changes to STOP mode when the above operation is performed.
(3) The Program Start parameter is again changed from RSET to STRT using either an event or key operations.
The RUN/STOP status will automatically change to RUN mode when the above operation is performed.
(4) The RUN/STOP status automatically changes to STOP mode when soak time expires.
END flashes on the No. 2 display and the program END output turns ON.
(5) The Program Start parameter is changed from STRT to RSET using either an event or key operations.
The END display is cleared and the program END output turns OFF.
(6) Key operations are used to switch the RUN/STOP status to RUN with the Program Start parameter configured
to RSET (stopped).
Normal control operation is started.
(7) The Program Start parameter is changed from RSET to STRT after the process value stabilizes.
The RUN/STOP status remains as RUN.
(8) Key operations are used to change the RUN/STOP status to STOP (during program operation).
Measuring the soak time is continued within the wait band. (Measuring the soak time stops when the process
value leaves the wait band.)
(9) Key operations are used to change the RUN/STOP status to RUN.
Measuring the soak time is continued within the wait band (continuing from the time between (7) and (9)).
(10) The RUN/STOP status automatically changes to STOP mode when the measured time reaches the soak time.
END flashes on the No. 2 display and the program END output turns ON.

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Output Adjustment Output Limits

Functions
Output limits can be configured to limit the output using the Upper- and
Lower-Limits to the calculated MV.

The following MV takes priority over the MV limits.

• Manual MV
• MV at stop
• MV at PV error
Figure 4.164
Output
100%

MV upper limit

MV lower limit
0%

Note: 1. When the manual MV limit is enabled, the manual MV will be

restricted by the MV limit.
Note: 2. For heating/cooling control, Upper- and Lower-Limits are config-
ured of overall heating/cooling control. (They cannot be config-
ured separately for heating/cooling.)
Figure 4.165
Output Heating MV Cooling MV

MV lower limit

MV upper limit

MV at Stop

You can configure the amount the MV is output during the controller STOP
mode using the MV at Stop parameter. For heating/cooling control, the MV at
Stop will apply to the cooling side if the MV is negative and to the heating side
if the MV is positive.When configuring the MV at Stop parameter also
configure the MV at Stop and Error Addition parameter (Advanced Setting
function group) to ON. The default is 0.0, so an MV will not be output for
either standard or heating/cooling control.

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Table 4.AH
Parameter Configurable Range Unit Default
MV at Stop −5.0…105.0 for standard control % 0.00
−105.0…105.0 (heating/cooling control)

Note: The order of priority is as follows: Manual MV > MV at stop > MV at

PV error.

MV at PV Error

You can configure the amount the MV is output during an input error
condition. The MV at stop takes priority when stopped and the manual MV
takes priority in manual mode.

Table 4.AI
Parameter Configurable Range Unit Default
MV at PV error −5.0…105.0 for standard control % 0.0
−105.0…105.0 (heating/cooling control)

Note: The order of priority is as follows: Manual MV > MV at stop > MV at

PV error.

The order of priority of the MVs is illustrated in the following diagram.

Figure 4.166

1
MV upper limit MV at PV Error Manual MV

RUN/STOP
Manipulated variable

Output
PID
calculations
Input error Auto/manual switch
Time

MV at Stop
MV lower limit

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Using the Extraction of Square Root Parameter

Extraction of Square Roots

Figure 4.167 — Extraction of Square Root Enable

sqr
off

• For analog inputs, the Extraction of the Square Root parameter is provided
for inputs so that differential pressure-type flow meter signals can be directly
input.

• The default setting for the Extraction of Square Root parameter is OFF. The
Extraction of Square Root Enable parameter must be configured to ON in
order to use this function.

Figure 4.168 — Extraction of Square Root Low-cut Point

sqrp
0.0

• If the PV input (i.e., the input before extracting the square root) is higher
than 0.0% and lower than the low cut point configured in the Extraction of
Square Root Low-Cut Point parameter, the results of extracting the square
root will be 0.0%. If the PV input is lower than 0.0% or higher than 100.0%,
extraction of the square root will not be executed, so the result will be equal to
the PV input. The low-cut point is configured as normalized data for each
input, with 0.0 as the lower limit and 100.0 as the upper limit for the input
setting range.

Figure 4.169 —Extraction of the Square Root

Extraction of
square root
100% FS

Extraction of square
root low-cut point
0 100% FS
Argument 1 (Input Data)

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Table 4.AJ
Parameter Name Configurable Range Unit Default
Extraction of the Square Root Enable OFF: Disabled, ON: Enabled --- OFF
Extraction of Square Root Low-cut Point 0.0...100 % 0.0

Operating Procedure

This procedure sets the Extraction of Square Root Low-cut Point parameter to
10.0%

Figure 4.170 — Operation function group

C PV/SP
25
100

1. Press the O Key for at least three seconds to move from the Operation to
the Initial Setting function group.

Figure 4.171
Input Type
in-t
0

2. Press the M Key to select the Extraction of Square Root Enable parameter.

Figure 4.172
Extraction
sqr of Square
Root Enable
off

3. Use the U Key to select ON.

Figure 4.173
Extraction
sqr of Square
Root Enable
on

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 Parameter Adjustments & Application Considerations 4-79

4. Press the O Key for at least one second to move from the Initial Setting to
the Operation function group.

Figure 4.174
C PV/SP
25
100

5. Press the O Key to move from the Operation function group to the
Adjustment function group.

Figure 4.175

l.adj

6. Select the Extraction of Square Root Low-cut Point parameter by pressing

the M Key Operating Procedure

Figure 4.176
Extraction of
sqrp Square Root
Low-cut Point
0.0

7.Use the U Key to set the parameter to -10.0.

Figure 4.177
Extraction of
sqrp Square Root
Low-cut Point
10.0

8. Press the O Key to return to the Operation function group.

Figure 4.178
C PV/SP
25
100

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4-80 Parameter Adjustments & Application Considerations

Setting the Rate of MV Variation

The MV Change Rate Limit parameter sets the maximum allowable rate of
change in the MV in units of percent per second. If the change in the MV
exceeds this setting, the MV will be changed by the MV change rate limit until
the calculated value is reached. This function is disabled when the setting is
0.0.

The MV Change Rate Limit parameter does not function in the following
situations:

• In manual mode
• During ST execution (Cannot be configured when ST is ON.)
• During AT execution
• During ON/OFF control
• While stopped (during MV at Stop output)
• During MV at PV Error output

Table 4.AK
Parameter Name Configuration Range Units Default
MV Change Rate Limit 0.0...100 %/s 0.0

Operating Procedure

This procedure sets the MV Change Rate Limit to parameter 5.0%/s. The
related parameters are as follows:

PID·ON/OFF = PID
ST = OFF

Figure 4.179 — Operation function group

C PV/SP
25
100

1. Press the O Key for at least three seconds to move from the Operation
function group to the Initial Setting function group.

Figure 4.180
Input Type
in-t
0

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 Parameter Adjustments & Application Considerations 4-81

2. Select the PID ON/OFF parameter by pressing the M Key.

Figure 4.181
PID·ON/OFF
cntl
onof

3. Use the U Key to select 2-PID control.

Figure 4.182
PID·ON/OFF
cntl
pid

4. Press the M Key to select the ST parameter.

Figure 4.183
ST
st
on

5. Press the D Key to select OFF.

Figure 4.184
ST
st
off

6. Press the O Key for at least one second to move from the Initial Setting to
the Operation function group.

Figure 4.185
C PV/SP
25
100

7. Press the O Key to move from the Operation function group to the
Adjustment function group.

Figure 4.186

l.adj

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4-82 Parameter Adjustments & Application Considerations

8. Press the M Key to select the MV Change Rate Limit parameter.

Figure 4.187
MV
orl Change
Rate Limit
0.0

9. Use the U Key to set the parameter to 5.0.

Figure 4.188
MV
orl Change
Rate Limit
5.0

10. Press the O Key to return to the Operation function group.

Figure 4.189
C PV/SP
25
100

Setting the PF Key

PF Setting (Function Key)

Pressing the PF Key for at least one second executes the operation configured
in the PF Setting parameter (900-TC8 only).

The possible operations are outlined in the below table.

Table 4.AL
Set Value Symbol Operation Function
OFF off Disabled Does not operate as function key
RUN run RUN Specifies RUN status
STOP stop STOP Specifies STOP status
R-S r-s RUN/STOP reverse Specifies reversing the RUN/STOP
operation operation status
AT-2 at-2 100% AT Specifies reversing the 100% AT
Execute/Cancel Execute/Cancel status (see note 1)
AT-1 at-1 40% AT Specifies reversing the 40% AT
Execute/Cancel Execute/Cancel status

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 Parameter Adjustments & Application Considerations 4-83

Table 4.AL
Set Value Symbol Operation Function
LAT lat Alarm Latch Cancel Specifies canceling all alarm
latches (see note 2)
A-M a-m Auto/Manual Specifies reversing the
Auto/Manual status (see note 3)
PFDP pfdp Monitor/Setting Specifies the monitor/setting item
Item display. Select the monitor setting
item according to the Monitor/
Setting Item 1 to 5 parameters
(advanced setting function group).

Note:

1. When AT cancel is specified, it means that AT is cancelled regardless of

whether the AT currently being executed is 100% AT or 40% AT.

2. Alarms 1 to 3, heater burnout, HS alarms, and heater over-current

latches are cancelled.

3. For details on auto/manual operations using the PF Key, refer

Performing Manual Control.

4. Pressing the PF Key for at least one second executes operation

according to the configured value. When the Monitor/Setting Item
parameter is selected, however, the display is changed in order from
Monitor/Setting Item 1 to 5 each time the key is pressed.

5. This function is enabled when PF Key Protect is OFF.

Monitor/Setting Item Monitor/Setting Item

Monitor/Setting Item 1

pfd1 Item 5
pfd5
1
0

Setting the PF Setting parameter to the Monitor/Setting function makes it

possible to display monitor/setting items using the function key. The following

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4-84 Parameter Adjustments & Application Considerations

table shows the details of the settings. For setting (monitor) ranges, refer to
applicable parameter.

Table 4.AM — Setting Detail

Remarks
Set Value Operation/Function Monitor/Setting Symbol
0 Disabled ---
1 PV/SP/Multi-SP Can be configured. (SP) ---
2 PV/SP/MV (see note) Can be configured. (SP) ---
3 PV/SP/Soak time remain Can be configured. (SP) ---
4 Proportional band (P) Can be configured. p
5 Integral time (I) Can be configured. c
6 Derivative time (D) Can be configured. d
7 Alarm value 1 Can be configured. al-1
8 Alarm value upper limit 1 Can be configured. al1h
9 Alarm value lower limit 1 Can be configured. al1l
10 Alarm value 2 Can be configured. al-2
11 Alarm value upper limit 2 Can be configured. al-2h
12 Alarm value lower limit 2 Can be configured. al-2l
13 Alarm value 3 Can be configured. al-3
14 Alarm value upper limit 3 Can be configured. al3h
15 Alarm value lower limit 3 Can be configured. al3l

Note: For details on MV settings for heating and cooling control, refer to MV Display for
Heating and Cooling.

Configuring Monitor/Setting Items

Pressing the PF Key in wither the Operation or Adjustment function group

displays the applicable monitor/settings items. Press the PF Key to display in
order Monitor/Setting items 1 to 5. After Monitor/Setting Item 5 has been
displayed, the display will switch to the top parameter in the Operation
function group.

1. Items configured as disabled in the Monitor/Setting Items 1 to 5

parameters will not be displayed, and the display will skip to the next
enabled item.

2. While a monitor/setting item is being displayed, the display will be

switched to the top parameter in the Operation function group if the M
Key or the O Key is pressed.

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 Parameter Adjustments & Application Considerations 4-85

Operating Procedure

This procedure sets the PF Setting parameter to PFDP, and the

Monitor/Setting Item 1 parameter to 7 (Alarm Value 1).

Figure 4.190 — Operation Function Group

C PV/SP
25
100

1. Press the O Key for at least three seconds to move from the Operation
to the Initial Setting function group.

Figure 4.191
Input Type
in-t
5

2. Select the Move to Advanced Setting function group parameter by

pressing the M Key.

Figure 4.192
Move to Advanced
amov Setting Function Group

-169

3. Press the D Key to enter the password (-169). It is possible to move to

the Advanced Setting function group by either pressing the M Key or
waiting two seconds without pressing any key.

Figure 4.193
Parameter
init Initialization
off

4. Press the M Key to select the PF Setting parameter.

Figure 4.194
PF Setting
pf
a-m

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4-86 Parameter Adjustments & Application Considerations

5. Press the U Key to select PFDP (Monitor/Setting Item).

Figure 4.195
PF Setting
pf
pfdp

6. Press the M Key to select the Monitor/Setting Item 1 parameter.

Figure 4.196
Monitor/Setting
pfd1 Item 1
1

7. Press the U Key to select 7 (Alarm Value 1).

Figure 4.197

Monitor/Setting
pfd1 Item 1
7

8. Press the O Key for at least one second to move from the Advanced
Setting to the Initial Setting function group.

Figure 4.198
Input Type
in-t
5

9. Press the O Key for at least one second to move from the Initial
Setting to the Operation function group.

Figure 4.199
C
25 alm

100

10. Press the PF Key to display Alarm Value 1.

Figure 4.200
C Monitor/Setting
al-1 Item Display 1
0

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 Parameter Adjustments & Application Considerations 4-87

Counting Control Output Control Output ON/OFF Count Function

ON/OFF Operations
With Control Output 1 and 2 ON/OFF outputs (relay outputs or voltage
outputs for driving SSR), the number of times that a control output turns ON
and OFF can be counted. Based on the control output ON/OFF count alarm
configured value, an alarm can be output and an error can be displayed if the
configured count value is exceeded.

The default configuration of the Control Output ON/OFF Alarm Setting

parameter is 0. ON/OFF operations are not counted when this parameter is
configured to 0. To enable counting ON/OFF operations, change the
configuration to a value other than 0.

Control Output ON/OFF Counter Monitor Function

This function is not displayed when the Control Output 1 ON/OFF Alarm
Setting and the Control Output 2 ON/OFF Alarm Setting parameter are set
to 0, or when the control outputs are set for linear (analog) outputs.

Table 4.AN
Parameter Name Configurable Range Unit Default
Control Output 1 ON/OFF Count 0 to 9999 100 times 0
Monitor
Control Output 2 ON/OFF Count 0 to 9999 100 times 0
Monitor (900-TC8 & 900-TC16)

Display When ON/OFF Count Alarm Occurs

When an ON/OFF count alarm occurs, the PV display in the No. 1 display
shown below alternates with the ralm display on the No. 2 display.

• PV
• PV/SP (Including the items displayed by setting the “PV/SP” Display
Screen Selection parameter.)
• PV/Manual MV, PV/SP/Manual MV
• PV/SP displayed for the monitor/setting items
Normal ON/OFF Count Alarm
C C
PV/SP 25 25 Alternating
display
100 ralm 100

Control Output ON/OFF Count Alarm Function

If the ON/OFF counter exceeds the control output ON/OFF count alarm
configured value, an ON/OFF count alarm will occur. The alarm status can be
assigned to a control output or an auxiliary output, or it can be displayed at the

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4-88 Parameter Adjustments & Application Considerations

Controller. The ON/OFF count alarm configured value function is disabled

by setting the ON/OFF count alarm configured value to 0.

Table 4.AO
Configurable
Parameter Name Range Unit Default
Control Output 1 ON/OFF Alarm Setting 0 to 9999 100 times 0
Control Output 2 ON/OFF Alarm Setting 0 to 9999 100 times 0
(900-TC8 & 900-TC16)

ON/OFF Counter Reset Function

The ON/OFF counter can be reset for a specific control output.

Table 4.AP
Parameter Name Configurable Range Unit Default
ON/OFF Counter 0: Disable the counter reset function. --- 0
Reset 1: Reset the control output 1 ON/OFF
counter.
2: Reset the control output 2 ON/OFF
counter (900-TC8 & 900-TC16).

Note: After the counter has been reset, the control output ON/OFF count
monitor value will be automatically returned to 0.

If an error occurs in the control output ON/OFF counter data, the

ON/OFF count monitor value will be configured to 9999 and an
ON/OFF count alarm will occur. The alarm can be cleared by resetting
the ON/OFF counter.

Operating Procedure

This procedure sets the Control Output 1 ON/OFF Alarm Setting parameter
to 10 (1,000 times).

1. Press the O Key for at least three seconds to move from the Operation
to the Initial Setting function group.

Figure 4.201
Input Type
in-t
5

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 Parameter Adjustments & Application Considerations 4-89

2. Select the Move to Advanced Setting function group parameter by

pressing the M Key.

Figure 4.202
Move to Advanced
amov Setting Function Group

-169
3. Use the D Key to enter the password (“-169”). It is possible to move to
the Advanced Setting function group by either pressing the M Key or
waiting two seconds without pressing any key.

Figure 4.203
Parameter
init Initialization
off
4. Press the M Key to select the Control Output 1 ON/OFF Count
Alarm Set Value parameter.

Figure 4.204
Control Output 1
ra1 ON/OFF
Counter Alarm
0 Set Value

5. Use the U Key to set the parameter to 10.

Figure 4.205
Control Output 1
ra1 ON/OFF
Counter Alarm
10 Set Value

6. Press the O Key for at least one second to move to the Initial Setting
function group.

Figure 4.206
Input Type
in-t
5

7. Press the O Key for at least one second to move to the Operation
function group.

Figure 4.207
C
25 alm

100

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4-90 Parameter Adjustments & Application Considerations

Displaying PV/SV Status

PV and SV Status Display Functions

The PV in the PV/SP, PV, or PV/Manual MV Display and the control and
alarm status specified for the PV status display function are alternately
displayed in 0.5-s cycles.

Table 4.AQ — PV Status Display Function

Set Value Symbol Function
OFF off No PV status display
Manual manu MANU is alternately displayed during manual control
Stop stop STOP is alternately displayed while operation is stopped
Alarm 1 alm1 ALM 1 is alternately displayed during Alarm 1 status.
Alarm 2 alm2 ALM 2 is alternately displayed during Alarm 2 status.
Alarm 3 alm3 ALM 3 is alternately displayed during Alarm 3 status.
Alarm 1 to 3 alm ALM is alternately displayed when Alarm 1, 2, or 3 is
OR status configured to ON.
Heater ha HA is alternately displayed when a heater burnout alarm,
Alarm HS alarm, or heater overcurrent alarm is ON.
(See Note)

The default is OFF.

“HA” can be selected for models that do not support heater burnout detection
but the function will be disabled.

EXAMPLE

When STOP Is Selected for the PV Status Display Function

When RUN/STOP
Normal is STOP
C C
PV/SP
25 stop Alternating
display
100 100 25

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 Parameter Adjustments & Application Considerations 4-91

SV Status Display Function

The SP, Blank, or Manual MV in the PV/SP, PV, or PV/Manual MV Display

and the control and alarm status specified for the SV status display function
are alternately displayed in 0.5-s cycles.

Table 4.AR — SV Status Display Function

Set Value Symbol Function
OFF off No SV status display
Manual manu MANU is alternately displayed while operation is
stopped.
Stop stop STOP is alternately displayed while operation is
stopped
Alarm 1 alm 1 ALM 1 is alternately displayed during Alarm 1 status
Alarm 2 alm 2 ALM 2 is alternately displayed during Alarm 2 status
Alarm 3 alm 3 ALM 3 is alternately displayed during Alarm 3 status
Alarm 1 to 3 alm ALM is alternately displayed when Alarm 1, 2, or 3 is
OR status configured to ON.
Heater Alarm hr HA is alternately displayed when a heater burnout
(See note.) alarm, HS alarm, or heater overcurrent alarm is ON.

The default is OFF.

Note: “HA” can be selected for models that do not support heater burnout
detection, but the function will be disabled.

Example: When ALM1 Is Selected for the SV Status Display Function

Normal When ALM1 Is ON
C C
PV/SP
25 25 Alternating
display
100 alm1 100

Operating Procedure

This procedure sets the PV Status Display Function parameter to ALM1.

1. Press the O Key for at least three seconds to move from the Operation
to the Initial Setting function group.

Figure 4.208
Input Type
in-t
5

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4-92 Parameter Adjustments & Application Considerations

2. Select the Move to Advanced Setting function group parameter by

pressing the M Key

Figure 4.209
Move to Advanced
amov Setting Function Group
-169

3. Use the D Key to enter the password (-169). It is possible to move to

the Advanced Setting function group by either pressing the M Key or
waiting two seconds without pressing any key.

Figure 4.210
Parameter
init Initialization
off

4. Press the M Key to select the PV Status Display Function parameter.

Figure 4.211
PV Status
pvst Display
Function
off

5. Press the U Key to select ALM1.

Figure 4.212
PV Status
pvst Display
Function
alm1

6. Press the O Key for at least one second to move to the Initial Setting

Figure 4.213 Initial Setting function group

Input Type
in-t
5

7. Press the O Key for at least one second to move to the Operation
function group. If the Alarm 1 status is ON, PV and ALM1 will be
alternately displayed.

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 Chapter 5

Parameter Functions & Definitions

Conventions Used in This About the Parameter Display

Chapter
Parameters are displayed on the controller only when the item(s) listed in the
Conditions of Use section for each parameter is satisfied. However, the
configuration of protected parameters is still valid and the protected
parameters are not displayed regardless of the Conditions of Use.

About the Order in which Parameters are Described

in This Chapter

Parameters are described in order by function group.

The first page of each function group section lists the parameters available in
that function group. The parameter names in this list are listed in the order
that they are displayed on the Bulletin 900-TC8, 900-TC16, and 900-TC32.

Alarms

This chapter describes when alarms are configured for the Control Output 1
or 2 Assignment parameters, or for the Auxiliary Output 1 or 3 Assignment
parameters. For example, when alarm 1 is configured for the Control Output 1
Assignment parameter, it will be specified that alarm 1 is assigned.

Protect Function Group Four different modes of protection are provided within the Protect function
group:

1. Operation/Adjustment protection

2. Initial Setting/Communications protection

3. Setting Change protection, and

4. PF key protect (900-TC8 only).

These protection parameters prevent unwanted operation of the controllers

front panel keys in varying degrees.

5-1 Publication 900-UM007D-EN-E - January 2011

5-2 Parameter Functions & Definitions

Figure 5.1
Power ON

Operation Adjustment
Function Group Function Group Press the + M Keys.
The display will flash.
Press the Key
for less than 1 second. C
25
100
Press and hold the Press and hold the
+ M Keys + M Keys
for at least 1 second. for at least 3 seconds.

Control in Progress. Protect

Function Group

To move from the Operation function group to the Protect function group,
press O and M keys for 3 seconds (refer to Note) or more.

Note: The time taken to move to the Protect function group can be adjusted
by changing the Move to Protect Function Group Time parameter
setting.

Figure 5.2

Protect Function Group

Page

pmov Move to protect function group

Displayed only when a password
5-3
0
is configured.
M

oapt Operation/Adjustment 5-3

0 protect
M
icpt Initial Setting/ 5-4
1 Communications protect
M
wtpt Configuration change 5-4
off protect
M
pfpt PF Key protect 5-5
off
M
pmsk Parameter mask enable 5-5
on
M
prlp Password to move to
protection function group
5-5
0
M

Parameters that are protected will not be displayed and their values cannot be
changed.

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 Parameter Functions & Definitions 5-3

pmov Move to Protect Function Group

Conditions of Use: The Password to Move to Protect function group

parameter must NOT be set to 0.

Function: This parameter allows you to specify a password that must be

entered to move to the Protect function group.

• The Operation/Adjustment Protect parameter will be displayed if the

correct password is entered.

Related Parameters

• Password to Move to Protect function group (Protect function group,

page 5-5).

oapt Operation/Adjustment Protection

Function: These parameters specify the range of parameters to be protected.

Table 5.A shows the relationship between the configured/set values and the
range of protection.

Table 5.A

Configured/Set Value
Function Group 0➊ 1 2 3
PV
Operation
PV/SP
Function Group
Others X X
Adjustment Function Group X X X
➊ Default Level of Protection: Can be displayed and changed. Can be displayed.
X Cannot be displayed and moving to other function groups is NOT possible.

Note: Parameter items are not protected when the configured/set value is 0.

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5-4 Parameter Functions & Definitions

icpt
Initial Setting/Communications Protection

This portion of the Protect function group restricts movement by keypad to

the Initial Setting function group, Communications Setting function group,
and Advanced Setting function group.

Table 5.B — Initial Setting/Communications Protection

Configured Initial Setting Communications Setting Advanced Setting

Value Function Group Function Group Function Group
0
1➊ X
2 X X X
➊ Default. Level of Protection: Able to reach, X Cannot reach.

Setting/Configuration Change Protection

Conditions of Use: Event Input Assignment 1 and 2 must NOT be

configured to “Setting Change Enabled/Disabled”

Function: This portion of the Protect function group restricts changes to

controller setup parameters by key operation.

Table 5.C — Setting/Configuration Change Protection

Configurable Range Default

on: Enabled, off: Disabled on

Table 5.D — Configuration Change Protection

Configured Value Description

OFF ➋ Setup can be changed by key operation.
ON Setup cannot be changed by key operation. (The Protect function
group can be changed.)
➋ Default

Note: The all protect indicator will light when configuration change
protection is ON.

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 Parameter Functions & Definitions 5-5

pfpt
PF Key Protect

Conditions of Use: The Controller must have a PF Key (900-TC8)

Function: The PF Key Protect parameter enables and disables PF Key

operation from the controller keypad (900-TC8).

Table 5.E PF Key Protect

Configured Value Description

OFF PF Key enabled from keypad
ON PF Key disabled from keypad (Operation as a function key is
prohibited.)
The shaded cell indicates the default.

pmsk Parameter Mask Enable

Conditions of Use: This parameter is displayed only when a parameter mask

has been configured from the Software Setup Tool.

Function: This parameter turns the parameter mask function ON and OFF.

Table 5.F

Configurable Range Default

on: Enabled, off: Disabled on

Note: A parameter mask can be used to hide the display of parameters at the
controller that are not needed. The parameter mask function is
provided by the Software Setup Tool.

prlp
Password to Move to Protect Function Group

Function: This parameter is used to configure the Password to Move to the

Protect function group.

To prevent setting the password incorrectly, the U and O keys or D and O

keys must be pressed simultaneously to configure the password.

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5-6 Parameter Functions & Definitions

Table 5.G

Configuration Range Default

−1999…9999 0

• Set this parameter to 0 when no password is to be configured.

Related Parameters

• Move to Protect function group (Protect function group, page 5-3)

Note: Protection cannot be cleared or changed without the password. Be

careful not to forget it.

Operation Function Group Use this function group when you want to carry out control operations on the
Bulletin 900-TC8, 900-TC16, and 900-TC32. You can configure/set alarm
values, monitor the manipulated variable (MV), and perform other operations
within this function group.

Note: This function group is displayed immediately after the power is turned
ON. To select other function groups, press the key, or
simultaneously hold down the and the M key.

Figure 5.3

Power ON

Operation Adjustment
Function Group Function Group
Press the
O Key less than 1 s.
Press the O Key for at
least 1 s; display will flash.
Press the O Key C

for at least 1 s. 25 Press the O Key for at least 3 s.

100 Control stops.

Communi-
cations
Initial Setting Setting
Function Group Function
Press the
Group
O Key for less than 1 s.

Control in progress

Control stopped

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 Parameter Functions & Definitions 5-7

Operation Function Group

Page Page

25 Process value al-1 Alarm 1 value

C C
5-7 5-16
0
M M
25 Process value/set point 5-8 al1h Alarm 1 value
C C
5-18
0 0 upper-limit
M M
a-m Auto/manual switch al1l Alarm 1 value
C
5-10 5-18
0 lower-limit
M M
m-sp Multi-SP set point
al-2 Alarm 2 value
C

setting 5-10 5-17

0 0
M M
sp-m Set point during SP
C C
5-10 al2h Alarm 2 value 5-19
0 ramp 0 upper-limit
M M
ct1 Heater current 1
C

5-11 al2l Alarm 2 value 5-20

0.0 value monitor 0 lower-limit
M M
ct2 Heater current 2 al-3 Alarm 3 value
C

5-12 5-18
0.0 value monitor 0
M M
lcr1 Leakage current 1 al3h Alarm 3 value
C
5-13 upper-limit 5-20
0.0 monitor 0
M M
lcr2 Leakage current 2 al3l Alarm 3 value
C

5-14 lower-limit 5-20

0.0 monitor 0
M M
prst Program start 5-15 o MV monitor (heating) 5-21
rset 0.0
M M
sktr Soak time remaining 5-15 c-o MV monitor (cooling) 5-22
0 monitor 0.0
M M
r-s RUN/STOP 5-16
run
M

PV (Process Value)

Conditions of Use: The Additional PV Display parameter must be set to ON.

Function: The process value (PV) is displayed on the No. 1 display, and
nothing is displayed (blank) on the No. 2 and No. 3 (900-TC8 only) display.

Table 5.H

Parameter Monitoring Range Units

Process Temperature: According to indication range for each sensor. EU
Value Analog: Scaling lower limit -5% FS to Scaling upper limit +5% FS

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5-8 Parameter Functions & Definitions

Note: When a temperature input (e.g., RTD) is selected, the decimal point
position depends on the currently selected sensor, and when an analog
input is selected, it depends on the Decimal Point parameter setting.

Related Parameters

Refer to the Initial Setting function group:

• Input Type (page 5-50)

• Set Point Upper-Limit, Set Point Lower-Limit (page 5-54)

PV/SP – Process Value/Set Point – No. 1 Display

PV/SP – Process Value/Set Point – No. 2 Display (900-TC8)

Function: The process value is displayed on the No. 1 display, and the set
point is displayed on the No. 2 display.

Table 5.I

Parameter Monitoring Range Units

Process Temperature: According to indication range for each sensor. EU
Value Analog: Scaling lower limit -5% FS to Scaling upper limit +5% FS

Table 5.J

Parameter Configurable Range Units

Set Point SP lower limit to SP upper limit EU

No. 3 Display (900-TC8)

The following table shows the contents of the No. 3 display, according to the
configuration of the PV/SP Display Screen Selection parameter.

Table 5.K

Configured Value No. 3 Display Contents

0 Only the PV and SP are displayed. (The No. 3 display is not shown.)
1 PV/SP/Multi-Sp and PV/SP/MV are displayed in order.
2 PV/SP/MV and PV/SP/Multi-SP are displayed in order.
3 Only PV/SP/Multi-SP are displayed
4 PV/SP/MV are displayed

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 Parameter Functions & Definitions 5-9

Table 5.K

Configured Value No. 3 Display Contents

5 PV/SP/Multi-SP and PV/SP/Soak time remain are displayed in
order.
6 PV/SP/MV and PV/SP/Soak time remain are displayed in order.
7 Only PV/SP/Soak time remain are displayed.

Note: When a temperature input (e.g., RTD) is selected, the decimal point
position depends on the currently selected sensor, and when an analog
input is selected, it depends on the Decimal Point parameter setting.

Note: A 2-level display is set when shipped from the factory.

Note: A 3-level display is activated if parameters are initialized.

Note: When 1, 2, 5, or 6 is selected, press the M Key to display PV/SP

(Display 2).

EXAMPLE

When the PV/SP Display Screen Selection Parameter is Set to 2:

Operation Level
PV/SP (Display 1) PV/SP (Display 2)
Press the M C
C
25 key. 25
100 100
50.0 sp0
PV/SP/MV PV/SP/Multi-SP

Related Parameter

• Input Type

• Set Point Upper Limit, Set Point Lower Limit (Initial Setting function
group, page 5-54)

• PV/SP Display Screen Selection (Advanced Setting function group,

page 5-8)

• PV (Process Value) (Advanced Setting function group, page 5-7)

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5-10 Parameter Functions & Definitions

a-m Auto Manual Switch

Conditions of Use: The Event Input Assignment 1 or 2 parameters must

NOT be set to Auto/Manual and the Auto/Manual Select Addition parameter
must be configured to ON. The control mode MUST be configured to 2-PID
control.

Function: This parameter switches the Controller between automatic and

manual modes when the PID control mode is used.

• If the O key is pressed for at least 3 seconds when the Auto/Manual

Switch parameter is displayed, the manual mode will be entered and the
Manual Control function group will be displayed.
• This parameter will not be displayed if an event input is used to
configure the controller to MANU (Auto/Manual).

Related Parameters

• PID ON/OFF (Initial Setting function group, page 5-55)

• Auto/Manual Select Addition (Advance Setting function group, page
5-87)

m-sp Multi-SP (Set Point 0…3)

Conditions of Use: The Multi-SP Uses parameter must be set to ON.

Function: The Multi-SP feature allows you to configure up to four different

set points (SP 0…3) in the Adjustment function group. Either of these
pre-configured values can be selected by operating the keys on the front panel
or by external input signals (event input) for use by the controller. In the
parameter, enter set points 0…3 to display the Multi-SP value.

sp-m Set Point During SP Ramp

Conditions of Use: The SP Ramp Set Value parameter must not be

configured to OFF. The ST (Self-Tuning) parameter must be OFF.

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 Parameter Functions & Definitions 5-11

Function: This parameter allows you to monitor the value of the Set Point
during a SP Ramp function.

Ramp is a function for restricting the amount the set point can change, from
the current value to a new value, as a rate of change.

The currently configured value is displayed when using the SP Ramp Set Value
parameter in the Advanced Setting function group.

When not in ramp operation, the set point is the same as the set point
displayed in the PV/SP parameter.

Table 5.L

Monitoring Range Units

SP: Set Point Lower-Limit to Set Point Upper-Limit EU

Related Parameters

• PV/SP (Operation function group, page 5-8)

• SP Ramp Set Value (Adjustment function group, page 5-41)
• Set Point Upper-Limit, Set Point Lower-Limit (Initial Setting function
group, page 5-54

Heater Current 1 Value Monitor

ct1 (900-TC8 &900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short (HSA) and Heater
Overcurrent (HOA) alarms must be supported and one CTs wired to the
controller. Alarm 1 must be assigned. The Heater Burnout Detection or
Heater Overcurrent Use parameter must be set to ON. CT Number 1 must be
wired to the controller.

Function: This parameter measures the heater current from a single CT input
used for detecting heater alarm conditions in 1-phase heaters and displays the
value on the controller.

• Heater burnout, heater short, and heater overcurrent conditions are not
detected if the Control Output (heating) ON time is 100 ms or less.

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5-12 Parameter Functions & Definitions

Table 5.M

Monitoring Range Units

0.0…55.0 A (Amps)

• ffff is displayed when 55.0 A is exceeded.

• If a heater burnout detection 1 or heater overcurrent detection 1 alarm
is output, the HA indicator will light and the No. 1 display for the heater
current 1 value monitor will flash.

Related Parameters

Refer to the Advanced Setting function group:

• Heater Burnout Detection 1, Heater Burnout Detection 2 (page 5-30)

• HB ON/OFF (page 5-74)
• Heater Overcurrent Detection 1, Heater Overcurrent Detection 2
(page 5-26)
• Heater Overcurrent Use (page 5-99)
• Error Displays ct1: (Chapter 6, page 6-5)

Heater Current 2 Value Monitor

ct2 (900-TC8 &900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short (HSA) and Heater
Overcurrent (HOA) alarms must be supported and two CTs wired to the
controller. Alarm 1 must be assigned. The Heater Burnout Detection or
Heater Overcurrent Use parameter must be set to ON. The second CT must
be wired to the controller.

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 Parameter Functions & Definitions 5-13

Function: This parameter measures the heater current from two CT inputs
used for detecting heater alarm conditions in 3-phase heaters and displays the
value on the controller.

Table 5.N

Monitoring Range Units

0.0...55.0 A (Amps)

• Heater burnout, heater short, and heater overcurrent conditions are not
detected if the Control Output (heating) ON time is 100 ms or less.
• ffff is displayed when 55.0 A is exceeded.
• If a heater burnout detection 2 or heater overcurrent detection 2 alarm
is output, the HA indicator will light and the No. 1 display for the heater
current 2 value monitor will flash.

Related Parameters

Refer to the Advanced Setting function group:

• Heater Burnout Detection 1, Heater Burnout Detection 2 (page 5-30)

• HB ON/OFF (page 5-30)
• Heater overcurrent detection 1, Heater overcurrent detection 2 (page
5-30)
• Heater overcurrent use (page 5-30)
• Error Displays ct2: (Chapter 6, page 6-5)

Leakage Current 1 Monitor

lcr1 (900-TC8 &900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short (HSA), and Heater
Overcurrent (HOA) alarms must be supported. Alarm 1 must be assigned and
CT Number 1 wired to the controller. The HS Alarm Use parameter must be
set to ON.

Function: This parameter measures the heater current from the Number 1
CT input used for detecting a short-circuit condition in single-phase heaters.

The heater current is measured and the value is displayed.

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5-14 Parameter Functions & Definitions

Table 5.O
Monitoring Range Units
0.0…55.0 A (Amps)

• HS alarm is not detected if the Control Output (heating) OFF time is

100 ms or less.

• ffff is displayed when 55.0 A is exceeded.

• If an HS alarm 1 alarm is output, the HA indicator will light and the No.
1display for the leakage current 1 monitor will flash.

Related Parameters

Refer to the Advanced Setting function group:

• HS Alarm 1, HS Alarm 2 (page 5-31)

• Failure Detection (page 5-88)
• Error Displays lcr1 (Chapter 6, page 6-5)
Leakage Current 2 Monitor
lcr2 (900-TC8 &900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short (HSA), and Heater
Overcurrent (HOA) alarms must be supported and two CTs (Number 1 and
Number 2) wired to the controller. Alarm 1 must be assigned. The HS Alarm
Use parameter must be set to ON.

Function: This parameter measures and displays the heater current from two
CT inputs used for detecting short-circuit conditions in 3-phase heaters.

This parameter measures and displays the heater current value.

Table 5.P

Monitoring Range Units

0.0…55.0 A (Amps)

• HS alarm is not detected if the Control Output (heating) OFF time is

100 ms or less.
• ffff is displayed when 55.0 A is exceeded.
• If an HS alarm 2 alarm is output, the HA indicator will light and the No.
1display for the leakage current 2 monitor will flash.

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 Parameter Functions & Definitions 5-15

Related Parameters

Refer to the Advanced Setting function group:

• HS Alarm 1, HS Alarm 2 (page 5-31)

• HS Alarm Use (page 5-88)
• Error Displays lcr2(Chpater 6, page 6-5)

prst Program Start

Conditions of Use: The Program Pattern parameter must NOT be set to

OFF.

Function: This parameter starts and stops the simple program function.

Table 5.Q
Parameter Function Default
rset Stops the simple program.(RSET) rset
strt Starts the simple program. (STRT)

• The RUN/STOP status LED will automatically switch to RUN when

this parameter is set to STRT.
• The simple program will stop when this parameter is set to RSET.
• This parameter will function as a monitor display for the start/stop
status of the simple program if an event input is selected to start the
simple program.

Related Parameters

• Soak Time Remain, RUN/STOP (Operation function group, page 5-16)

• Soak Time, Wait Band (Adjustment function group, page 5-39)
• Program Pattern (Initial Setting function group, page 5-57)
• Soak Time Unit (Advanced Setting function group, page 5-96)

sktr Soak Time Remain

Conditions of Use: The Program Pattern parameter must NOT be

configured to OFF.

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5-16 Parameter Functions & Definitions

Function: This parameter measures and displays the soak time remaining for
the simple program function.

Table 5.R

Monitoring Range Units

0…9999 Minutes or hours

Related Parameters

• Program Start (Operation function group, page 5-15)

• Soak Time, Wait Band (Adjustment function group, page 5-40)
• Program Pattern (Initial Setting function group, page 5-57)
• Soak Time Unit (Advanced Setting function group, page 5-96)

r-s RUN/STOP

Conditions of Use: The Event Input Assignments 1 and 2 parameter must

NOT be configured to RUN/STOP.

Function: This parameter allows you to change and monitor the operational
RUN/STOP mode of the controller.

When run: is selected, the controller is running. When stop: is selected, the
controller is stopped. When the controller is stopped, the STOP LED display
lights.

When the RUN/STOP function is being controlled by an event input, the

RUN/STOP function cannot be initiated by operating the keys on the
controller front panel, and the parameter will NOT be displayed in the
Operation function group.

Note: The default is run.

al-1
Alarm Value 1

Conditions of Use: Alarm 1 must be assigned. The alarm 1 type must not be
0, 1, 4, 5, or 12.

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 Parameter Functions & Definitions 5-17

Function: This parameter sets the alarm value for alarm 1. This parameter is
set to one of the input values “X” in the alarm type list. During temperature
input, the decimal point position depends on the currently selected sensor, and
during analog input it depends on the Decimal Point parameter setting.

Table 5.S

Configurable Range Unit Default

-1999 to 9999 EU 0

Related Parameters

• Input Type (Initial Setting function group, page 5-50),

• Scaling upper limit, Scaling lower limit, Decimal point (Initial Setting
function group, page 5-52)
• Standby Sequence Reset (page 5-72), Auxiliary output open in alarm
(page 5-73), Alarm 1 Hysteresis (page 5-61), Alarm 1 Latch (page 5-79)
(Advanced Setting function group).
• Alarm 1 Type (Initial Setting function group, page 5-59)

al-2
Alarm Value 2 (900-TC8, 900-TC16)

Conditions of Use: Alarm 2 must be assigned. The alarm 2 type must not be
0, 1, 4, 5, or 12.

Function: This parameter sets the alarm value for alarm 2. This parameter is
set to one of the input values “X” in the alarm type list. During temperature
input, the decimal point position depends on the currently selected sensor, and
during analog input it depends on the Decimal Point parameter setting.

Table 5.T

Configurable Range Unit Default

-1999 to 9999 EU 0

Related Parameters

• Input Type (Initial Setting setting function group, page 5-50)

• Scaling Upper Limit, Scaling Lower Limit, Decimal Point (Initial Setting
function group, page 5-52)
• Standby Sequence Reset (page 5-72), Auxiliary Output open in alarm
(page 5-73), Alarm 2 Hysteresis (page 5-62), Alarm 1 Latch (page 5-79)
(Advanced Setting function group).
• Alarm 2 Type (Initial Setting function group, page 5-59)

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5-18 Parameter Functions & Definitions

al-3
Alarm Value 3 (900-TC8)

Conditions of Use: Alarm 3 must be assigned. The alarm 3 type must not be
0, 1, 4, 5, or 12.

Function: This parameter sets the alarm value for alarm 3. This parameter is
set to one of the input values “X” in the alarm type list. During temperature
input, the decimal point position depends on the currently selected sensor, and
during analog input it depends on the Decimal Point parameter setting.

Table 5.U

Configurable Range Unit Default

-1999 to 9999 EU 0

Related Parameters

• Input Type, Scaling Upper Limit, Scaling Lower Limit, Decimal Point
(Initial Setting function group, page 5-52)
• Standby Sequence Reset (page 5-72), Auxiliary Output open in alarm
(page 5-73), Alarm 3 Hysteresis: (page 5-62), Alarm 3 Latch (page 5-79)
(Advanced Setting function group).
• Alarm 3 Type (Initial Setting function group, page 5-59)

al1h
Upper-Limit Alarm Value 1

al1l
Lower-Limit Alarm Value 1

Conditions of Use: Alarm 1 must be assigned and the Alarm 1 Type must
NOT be set to either 1, 4, or 5.

Function: This parameter allows independent configuration of the upper- and

Lower-Limit alarm values when the mode for configuring the Upper- and
Lower-Limits is selected for Alarm 1 Type (Initial Setting function group).

This parameter sets the Upper- and Lower-Limit alarm values for Alarm 1.

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 Parameter Functions & Definitions 5-19

When using a temperature input, the decimal point position depends on the
currently selected sensor, and when using an analog input it depends on the
Decimal Point parameter setting.

Table 5.V

Configurable Range Units Default Value

–1999…+9999 EU 0

Related Parameters

• Input Type (page 5-50), Scaling Upper-Limit, Scaling Lower-Limit,

Decimal Point (page 5-52), Alarm 1 Type (page 5-59) (Initial Setting
function group)
• Standby Sequence Reset (page 5-72), Auxiliary Output 1 Open in Alarm
(page 5-73), Alarm 1 Hysteresis (page 5-61), Alarm 1 Latch (page 5-79)
(Advanced Setting function group)

al2h
Upper-Limit Alarm Value 2

al2l
Lower-Limit Alarm Value 2 (900-TC8, 900-TC16)

Conditions of Use: Alarm 2 must be assigned and the Alarm 2 Type must
NOT be set to either 1, 4, or 5.

Function: This parameter allows independent configuration of the upper- and

Lower-Limit alarm limit values when the mode for configuring the Upper- and
Lower-Limits is selected for Alarm 2 Type (Initial Setting function group).

This parameter sets the Upper- and Lower-Limit alarm values for Alarm 2.

When using a temperature input, the decimal point position depends on the
currently selected sensor, and when using an analog input it depends on the
Decimal Point parameter setting.

Table 5.W

Configurable Range Units Default Value

–1999…+9999 EU 0

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5-20 Parameter Functions & Definitions

Related Parameters

• Input Type (page 5-50), Scaling Upper-Limit, Scaling Lower-Limit,

Decimal Point (page 5-52), Alarm 2 Type (page 5-59) (Initial Setting
function group)
• Standby Sequence Reset (page 5-72), Auxiliary Output 2 Open in Alarm
(page 5-73), Alarm 2 Hysteresis (page 5-62), Alarm 2 Latch (page 5-79)
(Advanced Setting function group)

al3h
Upper-Limit Alarm Value 3

al3l
Lower-Limit Alarm Value 3 (900-TC8 only)

Conditions of Use: Alarm 3 must be assigned and the Alarm 3 Type must
NOT be set to either 1, 4, or 5.

Function: This parameter allows independent configuration of the upper- and

Lower-Limit alarm limit values when the mode for setting the upper and lower
alarm limits is selected for Alarm 3 Type (Initial Setting function group).

This parameter sets the upper and lower alarm limit values for Alarm 3.

When using a temperature input, the decimal point position depends on the
currently selected sensor, and when using an analog input it depends on the
Decimal Point parameter setting.

Table 5.X

Configurable Range Units Default Value

–1999…+9999 EU 0

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 Parameter Functions & Definitions 5-21

Related Parameters

• Input Type (page 5-50), Scaling Upper-Limit, Scaling Lower-Limit,

Decimal Point (page 5-52), Alarm 3 Type (page 5-59) (Initial Setting
function group)
• Standby Sequence Reset (page 5-72), Auxiliary Output 3 Open in Alarm
(page 5-73), Alarm 3 Hysteresis (page 5-62), Alarm 3 Latch (page 5-79)
(Advanced Setting function group)

o
MV Monitor (Heating)

Conditions of Use: The Manipulated Variable (MV) display parameter must

be set to ON.

Function: This parameter allows you to monitor the Manipulated Variable

(for the heating Control Output).

Table 5.Y
Control Mode Monitoring Range Units
Standard –5.0…105.0 %
Heating and cooling 0.0…105.0 %

• This parameter cannot be configured.

• During standard control, the manipulated variable is monitored. During
heating/cooling control, the manipulated variables on the heating
Control Output is monitored.

Note: The default of the Manipulated Variable Display parameter is OFF and
the manipulated variable is not displayed.

Related Parameter

• Manipulated Variable Display (Advanced Setting function group, page

5-78)

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5-22 Parameter Functions & Definitions

c-o
MV Monitor (Cooling)

Conditions of Use: The control method must be heating and cooling control.
The Manipulated Variable Display parameter must be configured to ON.

Function: This parameter is for monitoring the manipulated variable (cooling

output) during heating and cooling control.

Table 5.Z
Control Mode Monitoring Range Units
Heating and cooling 0.0…105.0 %

• This parameter cannot be configured.

• During heating/cooling control the manipulated variable on the cooling

Control Output is monitored.

• The default is OFF and the manipulated variable is NOT displayed.

Related Parameters

• Standard or Heating and Cooling (Initial Setting function group, page

5-55)
• Manipulated Variable Display (Advanced Setting function group,
page 5-78)

Adjustment Function Group This function group is for executing AT (auto-tuning) or setting up the
controller.

This function group provides you with basic controller setup parameters for
PID (Proportional Band, Integral Time, Derivative Time) plus heating and
cooling control parameters.

Figure 5.4
Operation Adjustment
Function Group Function Group

Press the Key for

less than 1 second.

Control in Progress

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 Parameter Functions & Definitions 5-23

To move to the Adjustment function group from the Operation function

group, press the key for less than 1 second.

1. Adjustment function group parameters can be changed after

configuring the Operation/Adjustment Protect parameter to 0. Displays
and moving to other function groups is not possible if the
Operation/Adjustment Protect parameter is set from 1 to 3. Protection
is set in the Protect function group.

2. The Set Point Parameters 0 to 3 in the Adjustment function group are

the configured values for switching the set point during multi-SP input.

3. For 900-TC8 and 900-TC16: The following parameters are displayed

for Controllers with CT Inputs: Heater Current 1 to 3 monitor, Leakage
Current 1 to 3 monitor, Heater Burnout detections 1 to 3, HS Alarms 1
to 3, and Heater Overcurrent detection 1 to 3.

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5-24 Parameter Functions & Definitions

Figure 5.5

Adjustment Function Group

Page Page Page

l.adj Adjustment 5-24
Function Group
sp-0 SP 0 c-db Dead Band
C C
5-33 5-37
M Display 0 0.0
M M
at AT Execute/Cancel sp-1 SP 1 of-r Manual Reset Value
C
5-25 5-33 5-38
off 0 50.0
M M M
cmwt Communications sp-2 SP 2 hys Hysteresis (Heating)
C C
5-26 5-33 5-38
off Writing 0 1.0
M M M
ct1 Heater Current 1 sp-3 SP 3 chys Hysteresis (Cooling)
C C
5-26 5-33 5-38
0.0 Value Monitor 0 1.0
M M M
hb1 Heater Burnout 5-30
C
ins Temperature Input 5-34 soak Soak Time 5-39
0.0 Detection 1 0.0 Shift 1
M M M
insh Upper Limit
wt-b Wait Band
C C
oc1 Heater Overcurrent 5-28
Temperature Input
5-35 5-40
50.0 Detection 1 0.0 off
M M Shift Value M
insl Lower Limit mv-s MV at Stop
C

ct2 Heater Current 2 Value 5-27 5-35 5-40

0.0 Monitor 0.0 Temperature Input 0.0
M M Shift Value M
p Proportional Band mv-e MV at PV Error
C
hb2 Heater Burnout 5-31 5-35 5-41
0.0 Detection 2 8.0 0.0
M M M
oc2 Heater Overcurrent 5-29 i Integral Time 5-35
C
sprt SP Ramp Set Value 5-41
50.0 Detection 2 233 off
M M M
lcr1 Leakage Current 1 5-28 d Derivative Time 5-35 ol-h MV Upper Limit 5-42
0.0 Monitor 40 105.0
M M M
hs1 HS Alarm 1 5-31 c-sc Cooling Coefficient 5-36 ol-l MV Lower Limit 5-43
50.0 1.00 -5.0
M M
M
lcr2 Leakage Current 2 5-29 orl MV Change Rate Limit 5-43
0.0 Monitor 0.0
M M
hs2 HS Alarm 2 5-32 sqrp Extraction of Square 5-68
50.0 0.0 Root Low-cut Point
M M

ladd Adjustment Function Group Display

Function: This is the first parameter displayed after moving to the

Adjustment function group. This parameter indicates that the Adjustment
function group has been entered. (The Adjustment function group parameter
will not be displayed again even if the M key is pressed in the Adjustment
function group to scroll through the parameters.)

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 Parameter Functions & Definitions 5-25

at AT Execute/Cancel

Conditions of Use: The Bulletin 900-TC8, 900-TC16, or 900-TC32 must be

in operation (RUN), and the control method must be 2-PID control.

Function: This parameter allows you to initiate (turn ON) the controller’s AT
(auto-tuning) function.

When you initiate auto-tuning, the optimum PID parameters (Proportional

Band, Integral Time, and Derivative Time) for the current set point during
program execution are automatically set by the controller forcibly changing the
manipulated variable to calculate the characteristics of the control target.

Table 5.AA
Configurable Range Default
OFF: AT Cancel
AT-2: 100% AT Execute OFF
AT-1: 40% AT Execute

• Both 100% AT and 40% AT are supported for AT.

• Only 100% AT can be executed for heating and cooling control.

• For 900-TC8 and 900-TC16: This parameter will not be displayed

when either 100% or 40% AT execute/cancel is set to be executed using
an event input.

• This parameter is normally off. Press the U Key and select at-2 or
at-1 to execute AT. AT cannot be executed when control is stopped or
during ON/OFF control.

• When AT execution ends, the parameter setting automatically returns to

off.

Related Parameters

• Proportional Band, Integral Time, Derivative Time (Adjustment

function group, page 5-35)

• PID ON/OFF (Initial Setting function group, page 5-55)

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5-26 Parameter Functions & Definitions

cmwt Communications Writing

Conditions of Use: An RS-232 (900-TC8 only) or RS-485 (900-TC8 and/or

900-TC16 and/or 900-TC32) communication option unit must be mounted in
the controller.

Function: This parameter enables/disables writing of parameters to the

temperature controller from a personal computer using communications.

Note: For 900-TC8 and 900TC16: This parameter is not displayed in the
Adjustment function group if communications write Enable/Disable is
configured for execution using an Event Input Assignment 1 and 2.

Note: 900BuilderLite software can write to the controller regardless of the

Communications Writing status.

ON: Writing enabled

OFF: Writing disabled

Note: The default is OFF

Related Parameters

• MB Command Logic Switching (Advanced function group, page 5-82)

• Communication Unit No., Baud Rate, Data Bit, Parity, Stop Bit
(Communications Setting function group, page 5-110)

ct1
Heater Current 1 Value Monitor
(900-TC8, 900-TC16)

Conditions of Use: Heater burnout, heater short, and heater overcurrent

detection must be supported. Alarm 1 must be assigned. The Heater Burnout
ON/OFF or Heater Overcurrent use parameter must be configured to ON.

Function: This parameter measures and displays the current value in amps (A)
of the heater by using a single current transformer (CT) input. The single CT
hardware is also used to detect a heater burnout, heater short, or heater
overcurrent condition.

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 Parameter Functions & Definitions 5-27

Table 5.AB
Monitoring Range Units
0.0…55.0 A (Amps)

Note:

• Not all controllers support heater current monitor and heater

burnout/short (refer to Tables 1.B and 1.E).

• If a heater fault (open/short or overcurrent) is less than or equal to 100

ms it is not detected.

• ffff is displayed when 55.0 A is exceeded.

• If a Heater Burnout or overcurrent detection 1 Alarm condition is

detected the HA indicator will light, and the value will flash on the No. 1
display.

Related Parameters

Refer to the Advanced Setting function group:

• Heater Burnout Detection 1, Heater Burnout Detection 2 (page 5-30)

• HB ON/OFF (page 5-74)
• Heater overcurrent detection 1, Heater overcurrent detection 2 (page
5-26)
• Heater overcurrent use (page 5-99)
• Error displays ct1: (page 5-30)

ct2
Heater Current 1 Value Monitor
(900-TC8, 900-TC16)
Conditions of Use: Heater burnout, heater short, and heater overcurrent
detection must be supported (two CTs). Alarm 1 must be assigned. The Heater
Burnout ON/OFF or Heater Overcurrent Use parameter must be set to ON.

Function: This parameter measures the heater current from the CT input
used for detecting heater burnout.

This parameter measures and displays the heater current value

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5-28 Parameter Functions & Definitions

Note: If the Heater burnout or heater overcurrent fault is less than or equal to
100 ms it is not detected.

Table 5.AC

Monitoring Range Units

0.0…55.0 A (Amps)

• ffff is displayed when 55.0 A is exceeded.

• If a heater burnout detection 2 or heater overcurrent detection 2 alarm
is output, the HA indicator will light and the No. 1 display for the heater
current 2 value monitor will flash.

Related Parameters

• Heater Burnout Detection 1, Heater Burnout Detection 2 (Adjustment

function group, page 5-30)
• HB ON/OFF (Advanced Setting function group, page 5-74)
• Heater overcurrent detection 1, Heater overcurrent detection 2
(Adjustment function group, page 5-30)
• Heater overcurrent use (Advanced Setting function group, page 5-99)
• Error Displays ct2: (page 5-30)

lcr1
Leakage Current 1 Monitor (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout, (HBA) Heater Short (HSA) and Heater
Overcurrent detection must be supported. Alarm 1 must be assigned. The HS
Alarm parameter must be set to ON.

Function: This parameter measures the heater current from a single CT input
used for detecting a short-circuit condition.

This parameter measures and displays the heater current when the heater is
directed to be OFF by the controller.

Note: A Heater Short (HS) fault condition is not detected if its duration is 100
ms or less.

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 Parameter Functions & Definitions 5-29

Table 5.AD

Monitoring Range Units

0.0…55.0 A (Amps)

• ffff is displayed when 55.0 A is exceeded.

• If a HS alarm 1 alarm is output, the HA indicator will light, and the

leakage current value will flash on the No. 1 display.

Related Parameters

Refer to the Advanced Setting function group:

• HS Alarm 1, HS Alarm 2 (page 5-31)

• HS Alarm Use (page 5-88)
• Error Displays lcr1

lcr2 Leakage Current 2 Monitor (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA) and Heater Short (HSA) alarms
and heater overcurrent detection must be supported (two CTs). Alarm 1 must
be assigned. The HS Alarm parameter must be set to ON.

Function: This parameter measures the heater current from two CT inputs
used for detecting a short-circuit condition.

This parameter measures and displays the heater current value.

Note: A Heater Short fault condition is not detected if its duration is 100 ms
or less.

Table 5.AE

Monitoring Range Units

0.0…55.0 A (Amps)

• ffff is displayed when 55.0 A is exceeded.

• If an HS alarm 2 alarm is output, the HA indicator will light and the No.
1display for the leakage current 2 monitor will flash.

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5-30 Parameter Functions & Definitions

Related Parameters

Refer to the Advanced Setting function group:

• HS Alarm 1, HS Alarm 2 (page 5-31)

• HS Alarm Use (page 5-88)
• Error Displays lcr2

hb1 Heater Burnout Detection 1 (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA) and Heater Short (HSA) alarms
and heater overcurrent detection must be supported. Alarm 1 must be
assigned. The Heater Burnout Detection parameter must be set to ON. A
single CT must be wired to the controller (single-phase heater operation).

Function: This parameter allows you to configure the current value in amps
(A) at which the electrical Heater Burnout Alarm Output parameter becomes
active (ON).

Table 5.AF
Configurable Range Units Default Value
0.0…50.0 A (Amps) 0.0

• When the heater current value falls below the configured parameter
value, the Heater Burnout Alarm output goes ON. When the current is
equal to or greater than the value, the alarm is OFF.

• When the configured value is 0.0, the Heater Burnout Alarm is always
OFF. When the configured value is 50.0, the Heater Burnout Alarm is
always ON.

Related Parameters

Refer to the Advanced Setting function group:

• Heater Current 1 Monitor (page 5-13)

• Heater Burnout Detection, Heater Burnout Latch, Heater Burnout
Hysteresis (page 5-74)

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hb2 Heater Burnout Detection 2 (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA) and Heater Short (HSA) alarms
and heater overcurrent detection must be supported. Alarm 1 must be
assigned. The Heater Burnout Detection parameter must be set to ON. Two
CTs must be wired to the controller.

Function: This parameter allows you to configure the current value in amps
(A) at which the electrical Heater Burnout Alarm Output parameter becomes
active (ON).

Table 5.AG
Configurable Range Units Default Value
0.0…50.0 A (Amps) 0.0

• When the heater current value falls below the configured parameter
value, the Heater Burnout Alarm output goes ON. When the current is
equal to or greater than the value, the alarm is OFF.

• When the configured value is 0.0, the Heater Burnout Alarm is always
OFF. When the configured value is 50.0, the Heater Burnout Alarm is
always ON.

Related Parameters

Refer to the Advanced Setting function group:

• Heater Current 1 Monitor (page 5-13)

• Heater Burnout Detection, Heater Burnout Latch, Heater Burnout
Hysteresis (page 5-74)

hs1 HS Alarm 1 (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short (HSA) alarms and
heater overcurrent detection must be supported. Alarm 1 must be assigned.
The HS Alarm parameter must be set to ON. A single CT must be wired to the
controller.

Function: This parameter allows you to configure the current value in amps
(A) at which the Heater Short Alarm (HSA) output parameter becomes active
(ON).

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Table 5.AH
Configurable Range Units Default
0.0…50.0 A (Amps) 50.0

• The HS alarm is output when the heater current value goes above the
setting of this parameter.

• When the configured value is 50.0, the HS alarm is turned OFF. When
the configured value is 0.0, the HS alarm will turn ON.

Related Parameters

Refer to the Advanced Setting function group:

• Leakage Current 1 Monitor (page 5-13)

• HS Alarm, HS Alarm Latch, HS Alarm Hysteresis (page 5-89)

hs2 HS Alarm 2 (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA) and Heater Short (HSA) alarms
and heater overcurrent detection must be supported (Two CTs). Alarm 1 must
be assigned. The HS Alarm parameter must be set to ON. Two CTs must be
wired to the controller.

Function: This parameter allows you to configure the current value in amps
(A) at which the Heater Short Alarm (HSA) output parameter becomes active
(ON).

Table 5.AI
Configurable Range Units Default
0.0…50.0 A (Amps) 50.0

• The HS alarm is output when the heater current value goes above the
setting of this parameter.

• When the configured value is 50.0, the HS alarm is turned OFF. When
the configured value is 0.0, the HS alarm will turn ON.

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Related Parameters

Refer to the Advanced Setting function group:

• Leakage Current 2 Monitor (page 5-14)

• HS Alarm Use, HS Alarm Latch, HS Alarm Hysteresis (page 5-88)

sp-0
Set Point 0
sp-1
Set Point 1

sp-2 Set Point 2

sp-3
Set Point 3

Conditions of Use: The Number of Multi-SP Uses parameter must be

configured to either 1 or 2, and the Multi-SP Uses parameter must be
configured to ON.

Function: These parameters allow you to configure multiple (up to 4) set

point values as long as the Multi-SP function is also configured.

For 900-TC8 or 900-TC16, the configured values configured in these 4

parameters can be selected (loaded into the controller) by operating the keys
on the front panel or by event input.

Table 5.AJ
Configurable Range Units Default Value
Set Point Lower-Limit to Set Point Upper-Limit EU 0

• While operating (RUN) if a change is made to a set point (SP 0, SP 1,

SP 2, or SP 3) it takes effect approximately 2 seconds after entering the
value, or upon depressing the or M key.

• When using a temperature input, the decimal point position is

dependent on the selected sensor.

• When using an analog input, the decimal point position is dependent on

the setting of the Decimal Point position parameter.

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Related Parameter

• PV/SP (Operation function group, page 5-8), Input Type (Initial Setting
function group) (page 5-50)

Refer to the Advanced Setting function group:

• Event Input Assignment 1 (page 5-66)

• Event Input Assignment 2 (page 5-66)
• Number of Multi-SP Uses (page 5-65)
• Multi-SP Uses (page 5-71)

ins Temperature Input Shift

Conditions of Use: The Input Type parameter must be configured as a

temperature (thermocouple or RTD) input (this excludes a non-contact
temperature sensor). The Input Shift Type parameter must be configured for
One-Point Shift.

Function: Sometimes an error may exist between the measured temperature

(PV) and the actual temperature at the control target. To offset this error, add
your configured input shift value to the input (PV). The result is displayed on
the controller as the new measurement value (PV) and used for control.

Note: The entire input range is shifted by the input shift value (1-point shift).
If the input shift value is set to –1°C, the process is controlled to a value
obtained by subtracting 1°C from the actual temperature (refer to
Figure 4.2).

Table 5.AK Input Shift

Configurable Range Units Default Value

–199.9…+999.9 °C or °F 0.0

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

• Input Shift Type (Advanced Setting function group, page 5-86)

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insh Upper-Limit Temperature Input Shift Value,

insl Lower-Limit Temperature Input Shift Value

Conditions of Use: The Input Type parameter must be configured for a

thermocouple on RTD sensor and the Input Shift Type parameter must be
configured for 2-Point Shift. When using an infrared type sensor simply
configure Input Type to infrared and Upper/Limit Input Shift is automatically
allowed.

Function: Whereas the entire input range is shifted by a fixed value (1-point
shift) in the Temperature Input Shift parameter, this function shifts the input
range by two points (2-point shift) at the Upper- and Lower-Limits. This
allows a more accurate offset of the input range.

This parameter sets input shift values for each of the Upper- and Lower-Limits
(2-point shift) of the input range are shown in Table 5.AL , Allowable Range.

Table 5.AL — Allowable Range

Configurable Range Units Default Value

–199.9…+999.9 °C or °F 0.0

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

• Input Shift Type (Advanced Setting function group, page 5-86)

p Proportional Band,
i Integral Time,
d Derivative Time

Conditions of Use: The control method must be 2-PID control.

Function: These three parameters allow you to manually configure the PID
value parameters. Note that the PID parameters are automatically configured
by the controller when either the Auto-Tune (AT) or Self-Tune (ST)
parameters are executed.

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Proportional action: P refers to control in which the Manipulated Variable

(MV) is proportional to the deviation (control error).

Integral action: I gives a control action that is proportional to the time

integral of the deviation. With proportional control, there is normally an offset
(control error). So, proportional action is used in combination with integral
action. As time passes, this control error disappears, and the control
temperature (process value) comes to agree with the set point.

Derivative action: D gives a control action that is proportional to the time

derivative of the control error. As proportional control and integral control
correct for errors in the control result, the control system will be late in
responding to sudden changes in temperature. Derivative action enables
control that is proportional to a predicted process output to correct for future
error.

Table 5.AM

Parameters Controller Type Configurable Range Units Default

Proportional Band With Thermocouple or Resistance Detector 0.1…999.9 °C or °F ➊ 8.0
(RID)
With Analog Inputs %FS 10.0
Integral Time 0…3999 Seconds 233
Derivative Time RT is OFF 0…3999 Seconds 40
RT is ON 0.0…999.9 Seconds 40.0

➊ Set NONE as the unit for Controllers with 0…50 Millivolt Inputs.

Note: If the settings for RT (robust tuning) are changed, the Proportional
Band (P), Integral Time (I), and Derivative Time (D) will be initiated.

Related Parameter

• AT Execute/Cancel (Adjustment function group, page 5-25)

c-sc Cooling Coefficient

Conditions of Use: The control mode must be heating and cooling with the
2-PID control method configured.

Function: If the heating and cooling characteristics of the control target differ
greatly, preventing satisfactory control characteristics from being obtained by
the same PID parameters, adjust the proportional band (P) at the cooling
Control Output side by adding the cooling coefficient to balance control
between the heating and cooling sides (refer to Figure 4.26).

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In the heating and cooling control mode, the cooling Control Output side P is
calculated by the following formula to configure the cooling coefficient:

Cooling Control Output side P = Cooling coefficient x P (proportional band)

Table 5.AN

Configurable Range Units Default Value

0.01…99.99 None 1.00

Related Parameter

• Proportional Band (Adjustment function group, page 5-35)

c-db Dead Band

Conditions of Use: The control system must be configured for the heating
and cooling control mode.

Function: This parameter allows you to configure the output dead band width
in a heating and cooling control system. A negative value configures an overlap
band.

This parameter sets an area in which the Control Output is 0 centering around
the set point in a heating and cooling control system (refer to Figure 4.25).

The decimal point setting follows that of the currently configured sensor.
When using an analog input, the decimal point setting follows the Decimal
Point position configuration.

Table 5.AO

Configurable
Controller Type Range Units Default
With Thermocouple or Resistance −199.9…999.9 °C or °F ➊ 0.0
Thermometer (RTD)
With Analog Inputs −19.99…99.99 %FS 0.00
➊ Set NONE as the units for Controllers with 0…50 Millivolt Inputs.

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of-r Manual Reset Value

Conditions of Use: The control mode must be standard control with the
2-PID control method configured. In addition, the Integral Time parameter
must be set to 0.

Function: This parameter allows you to configure the manipulated variable to

remove offset during stabilization of P or PD control.

Table 5.AP

Configurable Range Units Default Value

0.0…100.0 % 50.0

Related Parameters

• PID ON/OFF (Initial Setting function group, page 5-55)

• Integral Time (Adjustment function group, page 5-35)

hys Hysteresis (Heating)

chys Hysteresis (Cooling)

Conditions of Use: The control method must be ON/OFF control. For

Hysteresis Cooling the control mode must be heating and cooling.

Function: This parameter allows you to configure the hysteresis function to

help ensure stable operation during ON/OFF control. For more details, refer
to page 3-26, Hysteresis.

• In the standard control mode, use the Hysteresis Heating parameter.

The Hysteresis Cooling parameter cannot be used in standard control
(refer to Figure 3.24).

• In the heating and cooling control mode, the Hysteresis parameter can
be set independently for heating and cooling. Use the Hysteresis
Heating parameter to configure the heating Control Output, and use the
Hysteresis Cooling parameter to configure the cooling Control Output
side hysteresis (refer to Figure 3.25).

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Table 5.AQ

Configurable
Parameters Controller Type Range Units Default
Hysteresis (heating) With Thermocouple or Resistance Thermometer (RTD) 0.1…999.9 °C or °F ➊ 1.0
With Analog Inputs 0.01…99.99 %FS 0.10
Hysteresis (cooling) With Thermocouple or Resistance Thermometer (RTD) 0.0…999.9 °C or °F ➊ 1.0
With Analog Inputs 0.01…99.99 %FS 0.10
➊ Set NONE as the unit for Controllers with 0…50 Millivolt Inputs.

Related Parameters

• PID ON/OFF, Standard or Heating/Cooling (Initial Setting function

group, page 5-55)

soak
Soak Time

Conditions of Use: The Program Pattern parameter must NOT be set to

OFF.

Function: This parameter enables you to configure the soak or delay time for
the control operation when using the simple program function.

Table 5.AR

Configurable Range Units Default

1…9999 Minutes or hours 1

Related Parameters

• Program Start, Soak Time Remain (Operation function group, page

5-15)
• Wait Band (Adjustment function group, page 5-40)
• Program Pattern (Initial Setting function group, page 5-57)
• Soak Time Unit (Advanced Setting function group, page 5-96)

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wt-b Wait Band

Conditions of Use: The Program Pattern parameter must NOT be set to

OFF.

Function: This parameter enables you to configure the stable band within
which the soak time is measured for the simple program function.

Table 5.AS

Configurable
Controller Type Range Units Default
With Thermocouple or Resistance OFF or °C or °F ➊
Thermometer (RTD) 0.1…999.9
Off
With Analog Inputs OFF or %FS
0.01…99.99

➊ Set NONE as the unit for Controllers with 0…50 Millivolt Inputs.

Related Parameters

• Program Start, Soak Time Remain (Operation function group, page

5-15)
• Soak Time (Adjustment function group, page 5-39)
• Program Pattern (Initial Setting function group, page 5-57)
• Soak Time Unit (Advanced Setting function group, page 5-96)

mv-s MV at Stop

Conditions of Use: The control method must be configured for 2-PID

control. The MV at Stop and Error Addition parameter must be configured to
ON.

Function: This parameter allows you to configure the amount the MV

(process output) is OPEN/ON when the RUN/STOP status changes from
RUN to STOP.

Table 5.AT

Configurable Range Units Default

−5.0…105.0 for standard control % 0.0
−105.0…105.0 (heating/cooling control)

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Related Parameters

• RUN/STOP (Operation function group, page 5-16)

• MV at Stop and Error Addition (Advance Setting function group, page
5-87)

mv-e MV at PV Error

Conditions of Use: The control must be configured for 2-PID control. The
MV at Stop and Error Addition parameter must be ON.

Function: This parameter allows you to configure the amount the MV

(process output) is Open/On when an input ERROR occurs.

Table 5.AU

Configurable Range Units Default

−5.0…105.0 for standard control % 0.0
−105.0…105.0 (heating/cooling control)

Related Parameters

• MV at Stop and Error Addition (Advance Setting function group, page

5-87)

sprt SP Ramp Set Value

Conditions of Use: Self tuning (ST) must be configured to OFF.

Function: If a large change is made to the value of the set point, it is possible
the rate the system reacts may exceed the desired limit. This parameter allows
you to configure the maximum rate of set point change. Configure the
maximum permissible change width per unit of time (minute) as the SP Ramp
value. However, note, that when the SP Ramp value is set to OFF, the SP ramp
function is disabled.

When using a temperature input, the decimal point position of the SP Ramp
value is dependent on the currently selected sensor, and when using an analog
input it is dependent on scaling.

Note: The SP Ramp Time Unites parameter in the Advanced Setting function
group allows you to enter seconds or minutes units.

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Table 5.AV

Parameter Configurable Range Units Default Value

SP Ramp Value OFF, 1…9999 EU OFF

Related Parameters

• Input Type (page 5-50), Scaling Upper-Limit, Scaling Lower-Limit (page

5-52), Decimal Point, ST (page 5-56) (Initial Setting function group)
• SP Ramp Time Units (Advanced Setting function group, page 5-71)

ol-h MV (Manipulated Variable) Upper-Limit,

ol-l MV (Manipulated Variable) Lower-Limit

Conditions of Use: The control method must be 2-PID control, and the ST
parameter must be set to OFF.

Function: The MV Upper-Limit and MV Lower-Limit parameters allow you

to configure the Upper- and Lower-Limits allowed for the manipulated
variable. If the current manipulated variable calculated by the Bulletin 900
Controller exceeds your configured MV upper- or Lower-Limit value, then the
current value becomes the upper or Lower-Limit MV value. Your configured
MV limits will NOT be exceeded by the controller.

MV Upper-Limit

The configurable ranges allowed during the standard control and heating and
cooling control modes are different.

The manipulated variable at the cooling Control Output side during heating
and cooling control is expressed as a positive value (refer to Table 5.AW).

Table 5.AW

Control Mode Configurable Range Units Default Value

Standard MV Lower-Limit % 105.0
+0.1…105.0
Heating and cooling 0.0…105.0 % 105.0

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MV Lower-Limit

The configurable ranges allowed during the standard control and heating and
cooling control modes are different.

The manipulated variable at the cooling Control Output side during heating
and cooling control is expressed as a negative value (refer to Table 5.AX).

Table 5.AX

Control Mode Configurable Range Units Default Value

Standard MV Upper-Limit –5.0…–0.1 % –5.0
Heating and cooling –105.0…+0.0 % –105.0

Related Parameters
• PID ON/OFF (Initial Setting function group, page 5-55)
• ST (Initial Setting function group, page 5-56)

orl MV (Manipulated Variable) Change Rate Limit,

Condition of Use: 2-PID control must be used. ST must be OFF.

Function: The MV Change Rate Limit parameter allows you to configure the
maximum allowable rate of change variation in the MV per second. If the
current rate of change in the MV exceeds this setting, the MV will be changed
to the configured MV change rate limit until the calculated value is reached. If
the limit is set to 0.0, this function will be disabled.

The MV Change Rate Limit parameter will NOT operate in the following
situations.

• In manual mode
• During ST execution (Cannot be set when ST is ON.)
• During AT execution
• During ON/OFF control
• While stopped (MV output during STOP)
• During MV output when error occurs

Table 5.AY

Configurable Range Units Default

0.0 to 100.00 %/s 0.0

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Related Parameters

• Proportional Bband (Adjustment function group, page 5-35)

5qrp Extraction of Square Root Low-cut Point,

Condition of Use: The input type must be an analog input, and the
Extraction of Square Root Enable parameter must be set to ON.

Function: This parameter sets the extraction of square root low-cut point
used for the inputs. The low-cut point is used for extracting the square root for
flow rate sensors. The data after extracting the square root is shown below.

Operation result
100% FS

Extraction of square
root low-cut point

0 100% FS
Argument 1 (input data)

Table 5.AZ

Configurable Range Units Default

0.0...100 % 0.0

Related Parameters

• Extraction of Square Root Enable (Initial Setting function group, page

5-44)

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Monitor/Setting Item Level Monitor/setting items can be displayed by means of the PF function key when
the PF Setting parameter (Advanced Setting function group) is configured to
(900-TC8) PFDP: Monitor/Setting Item.
Power ON

Operation Adjustment
Function Group Function Group

Press the Key

for at least 1 second.

PF Key Monitor/Setting Item PF Key

Function Group

Control in Progress

Monitor/Setting Item Display 1 to 5

Conditions of Use: The PF Setting parameter must be configured to PFDP,

and the Monitor/Setting Item 1 to 5 parameters must NOT be set to OFF.

Function: When the PF Key is configured to display monitor/setting items,

pressing the PF Key will display in order the contents of the Monitor/Setting
Item 1 to 5 parameters. The contents of these parameters are shown in the
following table. For the setting (monitor) ranges, refer to the applicable
parameters.

Table 5.BA

Remarks
Set
Value Setting Monitor/Setting Symbol
0 Disabled ---
1 PV/SP/Multi-SP Can be set. (SP) ---
2 PV/SP/MP Can be set. (SP) ---
3 PV/SP / Soak time remain Can be set. (SP) ---
4 Proportional band (P) Can be set. p
5 Integral time (I) Can be set. i
6 Derivative time (D) Can be set. d
7 Alarm value 1 Can be set. al-1
8 Alarm value upper limit 1 Can be set. al1h
9 Alarm value lower limit 1 Can be set. al1l

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Table 5.BA

Remarks
Set
Value Setting Monitor/Setting Symbol
10 Alarm value 2 Can be set. al-2
11 Alarm value upper limit 2 Can be set. al2h
12 Alarm value lower limit 2 Can be set. al2l
13 Alarm value 3 Can be set. al-3
14 Alarm value upper limit 3 Can be set. al3h
15 Alarm value lower limit 3 Can be set. al3l

Related Parameters

Refer to the Advanced Setting function group:

• PF setting (page 5-101)

• Monitor/setting items 1 to 5 (page 5-102)

Manual Control Function Group

When using the PID control mode, the MV Manipulated Variable (output) can
be controlled by you from the controller keypad in manual mode if the
PV/MV parameter is displayed.

Manual/Automatic mode changes will result in bumpless control of the MV

(output). In automatic mode, the final MV will be used as the initial manual
MV when moving from automatic mode to manual mode. In manual mode,
the change value will be fixed immediately and reflected in the actual MV.

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Figure 5.6
Operation Adjustment
Function Group Function Group
Press the Key for
at least 1 second. Press and hold the
PF Key for at least
Press the PF Key for at 1 second. 1
least 1 second or the a-m Press the Key for at least
1 second. The display will flash.
Key for at least 1
second. Press and hold the
1 Key for at least 3 seconds.

Manual Control
Function Group

1 When the PF Setting parameter is set to A-M for a controller that has a PF Key (900-TC8).

• To move from the Operation function group to the Manual Control

function group, press the O key for at least 3 seconds with the
Auto/Manual Switch parameter displayed.

Note: In addition, this operation can be performed using the PF Key by

setting the PF Key parameter (Advanced Setting function group) to
A-M (Auto/Manual). For details on the setting method, refer to
Performing Manual Control. This cannot be done during ON/OFF
operation.

• The MANU indicator will light during manual control.

• It is not possible to move to any displays except for the PV/MV

parameter during manual operation.

• To return to the Operation function group, press the O key or the PF

key in the Manual Control function group for at least 1 second.

PV/MV (Manual MV)

Function: When in manual control operation, the process value is displayed

on the No. 1 display, and the manipulated variable (manual MV) is displayed on
the No. 2 display, with a two display system. With a three display system

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(900-TC8) the PV, SP and the Manual MV can be displayed if the third
parameter is enabled (refer to the following graphics displays)

PV/SP/Manual MV
With No. 3 Display

C
25 C
25
Without No. 3 Display
C
100 50.0 25
MANU 50.0 MANU MANU
50.0
Note: When the PV/SP Display screen selection parameter is 0.

Table 5.BB

Monitor Range Units

Process value Temperature: According to indication range for EU
each sensor.

Analog: Scaling lower limit -5% FS to Scaling

upper limit +5% FS
Set Point SP lower limit to SP upper limit EU

Table 5.BC

Configurable Range Units

MV (manual MV) Standard control −5.0…105.0 ➊ %
Heating/cooling control −105.0…105.0 ➊
➊ When the MV Limit Enable Parameter is configured to ON, the configurable range will be the MV Lower Limit
to MV Upper Limit.

in-t Related Parameters

• Standard or Heating/Cooling (Initial Setting function group, page 5-55)

Initial Setting Function This function group is for configuring the basic parameters of the Bulletin 900
controller. In this function group, you can configure the Input Type parameter
Group for selecting the sensor input to be connected to the Bulletin 900 controller,
limit the range of set points, or set the alarm mode, and perform other
operations.

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Figure 5.7
Operation
Function Group

Press the Key \c

25 Press the Key
for 1 second. 100 for at least 3 seconds.

Inital Setting
Control in Progress Function Group
Control Stopped

To move from the Operation function group to the Initial Setting function
group, press key for 3 seconds with any parameter displayed except for
auto/man switch parameter.

• The Initial Setting function group is not displayed when the

Initial/Communications protection is set to 2. However, it can be used
when the Initial Setting/Communications Protection is set to 0 or 1.

• For 900-TC8 and 900-TC16: The Scaling Upper-Limit, Scaling

Lower-Limit, and Decimal Point parameters are displayed when an
analog input is selected as the Input Type.

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5-50 Parameter Functions & Definitions

Figure 5.8

Initial Setting Function Group

Page Page

in-t Input Type 5-50 cp Control Period (Heating) 5-57 tr-l Transfer Output Lower 5-63
0.0 Limit
5 20
M
M M
in-h Scaling Upper Limit 5-52 c-cp Control Period (Cooling) 5-57 o1-t Linear Current Output 5-64
4-20
100 20
M
M M
in-l Scaling Lower Limit 5-52 oreV Direct/Reverse 5-58 ev-m Number of Multi-SP 5-65
1 Uses
0 or-r Operation
M
M M
dp Decimal Point 5-53 alt1 Alarm 1 Type 5-59
ev-1 Event Input Assignment 5-66
none 1
0 2
M
M M
5-66
d-u Temperature Unit 5-53 alh1 Alarm 1 Hysteresis 5-61 ev-2 Event Input Assignment
0.2 stop 2
c
M
M M
sqr Extraction of Square 5-68
C
sl-h SP Upper Limit 5-54 alt2 Alarm 2 Type 5-59
off Root Enable
1300 2
M
M M 5-69
amov Move to Advanced
C
sl-l SP Lower Limit 5-54 alh2 Alarm 2 Hysteresis 5-62 0 Setting Function Group
-200 0.2
M
M M
cntl PID·ON/OFF 5-55 alt3 Alarm 3 Type 5-59
onof 2
M M
s-hc Standard or 5-55 alh3 Alarm 3 Hysteresis 5-62
stndHeating/Cooling 02
M M
5-62
st ST 5-56 tr-t Transfer Output Type
on off
M M
ptrn Program Pattern 5-57
tr-h Transfer Output Upper 5-63
off 100.0 Limit
M M

Input Type

Function: This parameter allows you to configure the sensor type by entering
a corresponding code (Set Value).

• When this parameter is changed, the set point limiter is changed to the
defaults of the new Input Type. If the Input Type must be changed,
re-configure your SP Upper-Limit and SP Lower-Limit parameters
(Initial Setting function group).
• Select one of the Set Values from the following table. Defaults are as
follows: ◘ Controllers with Thermocouple/Resistance Thermometer:
5 K thermocouple ◘ Controllers with Analog Inputs: 0 (current input, 4
to 20 mA) (not supported by 900-TC32).

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 Parameter Functions & Definitions 5-51

• If a platinum resistance thermometer (RTD) is mistakenly connected

while a setting for other than a platinum resistance thermometer is in
effect, the controller error code S.ERR will be displayed. To clear the
S.ERR display, check the wiring and then cycle the controller power.

Table 5.BD — Global Temperature (GT) Input Type Controllers

Input Type Specifications Set Value Input Temperature Range

Controller Platinum resistance Pt100 0 −200…850 (°C)/−300…1,500 (°F)
Type with thermometer (RTD)
1 −199.9…500.0 (°C)/−199.9…900.0 (°F)
Thermocouple
and 2 0.0…100.0 (°C)/0.0…210.0 (°F)
Resistance
Thermometer JPt100 3 −199.9…500.0 (°C)/−199.9…900.0 (°F)
(RTD) inputs 4 0.0…100.0 (°C)/0.0…210.0 (°F)
Thermocouple K 5 −200…1,300 (°C)/−300…2,300 (°F)
6 −20.0…500.0 (°C)/0.0…900.0 (°F)
J 7 −100…850 (°C)/−100…1,500 (°F)
8 −20.0…400.0 (°C)/0.0…750.0 (°F)
T 9 −200…400 (°C)/−300…700 (°F)
10 −199.9…400.0 (°C)/−199.9…700.0 (°F)
E 11 -200…600 (°C)/-300…1,100 (°F)
L 12 −100…850 (°C)/−100…1,500 (°F)
U 13 −200…400 (°C)/−300…700 (°F)
14 −199.9…400.0 (°C)/−199.9…700.0 (°F)
N 15 −200…1,300 (°C)/−300…2,300 (°F)
R 16 0…1,700 (°C)/0…3,000 (°F)
S 17 0…1,700 (°C)/0…3,000 (°F)
B 18 100…1,800 (°C)/300…3,200 (°F)
Infrared Temperature 10…70 (°C) 19 0…90 (°C)/0…190 (°F)
Sensor
60…120 (°C) 20 0…120 (°C)/0…240 (°F)
ES1B
115…165 (°C) 21 0…165 (°C)/0…320 (°F)
140...260 (°C) 22 0…260 (°C)/0…500 (°F)
Millivolt input 0…50 mV 23 One of the following ranges depending on the scaling.
−1,999…9,999
−199.9…999.9
Thermocouple W 24 0…2,000 (°C)/0…3,200 (°F)
PLII 25 0…1,300 (°C)/0…2,300 (°F)
Note: Shaded box indicates default selection for the GT controller type.

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Table 5.BE — Analog Input Type Controllers (900-TC8 & 900-TC16)

Input Type Specifications Set Value Input Temperature Range

Controller Current input 4…20 mA 0 One of the following ranges depending on the scaling.
Type with −1,999…9,999
0…20 mA 1
Analog −199.9…999.9
Inputs Voltage input 1…5 V 2 −19.99…99.99
−1.999…9.999
0…5 V 3
0…10 V 4
Note: Shaded box indicates default selection for the GT controller type.

Related Parameters

• Temperature Unit, Set Point Upper-Limit, Set Point Lower-Limit (Initial

Setting function group, page 5-54)

in-h Scaling Upper-Limit,

in-l Scaling Lower-Limit,
dp Decimal Point

Conditions of Use: For 900-TC8 and 900-TC16, the Input Type must be
configured as an analog input.

Function: When an analog input is selected as the Input Type, scaling to

engineering units (EU) other than temperature is possible. Set the Upper-Limit
in the Scaling Upper-Limit parameter and the Lower-Limit in the Scaling
Lower-Limit parameter.

The Decimal Point parameter specifies the decimal point position of the
system parameters (Set Point, etc.) whose unit is set to EU.

Table 5.BF — Scaling Upper-Limit, Scaling Lower-Limit Parameters

Parameter Configurable Range Units Default Value

Scaling Upper-Limit Scaling Lower-Limit +1…9999 None 100
Scaling Lower-Limit Scaling Upper-Limit –1999…–1 None 0

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Table 5.BG Decimal Point

Parameter Controller Type Configurable Range Default

Decimal Point Controllers with 0…1 0
Thermocouple/Resistance
Thermometer (RTD) inputs
Controllers with Analog Inputs 0…3 0

Table 5.BH

Configured Value Meaning Example

0 0 digits to the right of the decimal point 1234
1 1 digits to the right of the decimal point 123.4
2 2 digits to the right of the decimal point 12.34
3 3 digits to the right of the decimal point 1.234

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

d-u Temperature Units (°C/°F) Selection

Conditions of Use: The Input Type must be configured for a temperature

input (RTD, non-contact, or thermocouple).

Function: This parameter allows you to configure the temperature input units
to either °C or °F.

Table 5.BI

Selections Default Units

c: °C c
f: °F

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

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5-54 Parameter Functions & Definitions

sl-h Set Point Upper-Limit,

sl-l Set Point Lower-Limit

Function: These parameters allow you to configure the maximum allowable

range for an operator to enter the set point value. The SP can be configured
within the range defined by the Upper- and Lower-Limit values in the Set
Point Upper-Limit and Set Point Lower-Limit parameters. If an attempt is
made to enter a SP value outside the upper or Lower-Limit from the keypad
the set point display will flash at the configured maximum upper- or
Lower-Limit value.

If the temperature Input Type or temperature units are changed, the set point
Upper-Limit and set point Lower-Limit are forcibly changed by the controller
to the default Upper- and Lower-Limits of the newly configured sensor.

For a temperature input, the decimal point position is dependent on the

currently selected sensor. For an analog input, it is dependent on the Decimal
Point parameter setting.

Table 5.BJ — Controllers with Thermocouple/Resistance Thermometer Inputs

Parameter Input Type Configurable Range Units Default

Set Point Temperature SP Lower-Limit + 1 to Input EU 1300
Upper-Limit range Upper-Limit
Millivolt SP Lower-Limit + 1 to scaling EU 100
Upper-Limit
Set Point Temperature Input range Lower-Limit to SP EU −200
Lower-Limit Upper-Limit − 1
Millivolt Scaling Lower-Limit to SP EU 0
Upper-Limit − 1

Table 5.BK — Controllers with Analog Inputs (900-TC8 & 900-TC16)

Parameter Configurable Range Units Default

Set Point Upper-Limit SP Lower-Limit + 1 to scaling EU 100
Upper-Limit
Set Point Lower-Limit Scaling Lower-Limit to SP EU 0
Upper-Limit − 1

Related Parameters

• Input Type (page 5-50), Temperature Units (°C/°F) Selection (page

5-53) (Initial Setting function group)

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 Parameter Functions & Definitions 5-55

cntl PID ON/OFF

Function: This parameter allows you to configure the controller for either the
2-PID control or ON/OFF control method.

The Auto-Tuning (AT) and Self-Tuning (ST) parameter functions can only be
used in the 2-PID control method.

Table 5.BL

Selections Default Selection

pid: 2-PID onof: ON/OFF
onof: ON/OFF

Related Parameters

Refer to the Advanced Setting function group:

• AT Execute/Cancel (page 5-25), Manual Reset, Hysteresis heating,

Hysteresis cooling (page 5-38)

• ST Stable Range (page 5-75)

s-hc Standard or Heating/Cooling

Function: This parameter allows you to configure the controller for the
standard control mode or heating and cooling control mode.

When using a 900-TC8X in the heating and cooling control mode, the
Auxiliary Output 3 terminal (SUB3) is typically (default) used for cooling
Control Output functions.

When using a 900-TC16X in the heating and cooling control mode, the
Auxiliary Output 2 output terminal (SUB2) is typically (default) used for
cooling Control Output functions.

When heating/cooling control is selected for the 900-TC32, the auxiliary

output 1 terminal (SUB1) is assigned as the controloutput (cooling).

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Table 5.BM
Selections Default Selection
stnd: Standard stnd: Standard
h-c: Heating and cooling

Related Parameters

• MV Monitor (Heating) (page 5-21), MV Monitor (Cooling) (page 5-22)

(Operation function group)
• Cooling Coefficient, Dead Band (page 5-36), Hysteresis (heating),
Hysteresis (Cooling) (page 5-38) (Adjustment function group)
• Control Period (Heat), Control Period (Cool) (Initial Setting function
group, page 5-57)
• Control Output 1 Assignment (page 5-92), Control Output 2
Assignment (page 5-93), Auxiliary Output 1 Assignment (page 5-93),
Auxiliary Output 2 Assignment (page 5-94), Auxiliary Output 3
Assignment (page 5-95) (Advance Setting function group)

st ST Self-Tuning

Conditions of Use: The Input Type must be configured for a temperature

input with the standard control mode and 2-PID control method enabled.

Function: This parameter allows you to configure the controller to execute

the self-tuning function. The ST (self-tuning) function executes tuning from
the start of program execution to calculate the PID constants matched to the
control target of the application. When the ST function is in operation, make
sure to turn the power supply of the load connected to the control out put ON
simultaneously with or before starting operation of the Bulletin 900 controller.

Table 5.BN

Parameter Selections Default Selection

ST off: ST function OFF on
on: ST function ON

Related Parameters

• ST Stable Range (Advanced Setting function group, page 5-75)

• Input Type (page 5-50), PID ON/OFF (page 5-55) (Initial Setting
function group)

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 Parameter Functions & Definitions 5-57

ptrn Program Pattern

Function: This parameter allows you to select the type of control when using
the simple program function. If the program functionis set to:

• OFF, the simple program will not operate.

• STOP, the RUN/STOP status will change to STOP after the soak time
has expired.

• CONT, control will continue in RUN status after the soak time has
expired.

Table 5.BO

Selections Meaning Default

off Simple program function turned OFF off
stop Go to STOP mode at end of program.
cont Continue in RUN mode at end of program.

Related Parameters

• Program Start, Soak Time Remain (page 5-15), RUN/STOP (page 5-16)
(Operation function group)
• Soak Time, Wait Band (Adjustment function group, page 5-39)
• Soak Time Unit (Advanced Setting function group, page 5-96)

cp Control Period (Heat)

c-cp Control Period (Cool)

Conditions of Use: The control method must be configured for 2-PID

control. The cooling control and heating Control Outputs must be relay or
voltage (SSR) types. For the Control Period (cool) parameter the control mode
must be set to heating and cooling.

Function: This parameter allows you to configure the output period (control
period) which is the minimum amount of time between ON cycles of the
heating and cooling outputs. Set the control period taking the control
characteristics and the electrical life expectancy of the output devices into
consideration (especially if a mechanical relay is used).

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Table 5.BP
Parameter Configurable Range Units Default Value
Control Period (heat) 0.5 or 1…99 Seconds 20
Control Period (cool) 0.5 or 1…99 Seconds 20

• When the standard control mode is selected, use the Control Period
(cool) parameter. The Control Period (heat) parameter cannot be used.

• When the heating control output is an analog output the control period
cannot be used.

• When the heating and cooling control mode is selected, the Control
Period can be configured independently for the heating and cooling
outputs. Use the Control Period (heat) parameter to set the Control
Output 1 side control period, and use the Control Period (cool)
parameter to set the cooling control period.

Related Parameter

• PID ON/OFF (Initial Setting function group, page 5-55)

orev Direct/Reverse Operation

Function: This parameter allows you to configure the controller for the direct
or reverse operation of the manipulated variable (MV). Direct operation refers
to the control method where the manipulated variable is increased according
to the increase in the process value. Alternatively, reverse operation refers to
the control method where the manipulated variable is increased according to
the decrease in the process value.

Table 5.BQ

Selections Default
or-r: Reverse operation, or-d: Direct operation or-r

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 Parameter Functions & Definitions 5-59

alt1 Alarm Type for Alarm 1

Conditions of Use: Alarm 1 must be configured and supported by the

controller.

Function: This parameter allows you to configure the type of alarm operation
for Alarm Output 1. Select one of the following Alarm 1 types:

Deviation, Deviation range, Absolute value, LBA, or PV change rate

alarm.

Note: Refer to Table 5.BR for details.

Related Parameters

• Alarm value 1 (page 5-16); Alarm value upper limit 1, Alarm value lower
limit 1(page 5-18 (Operation function group)
• Standby sequence reset (page 5-72); Auxiliary output 1 open in alarm
(page 5-73); Alarm 1 latch (page 5-79) (Advanced Setting function
group); Alarm 1 hysteresis (Initial Setting function Group, page 5-61)

alt2 Alarm Type for Alarm 2 (900-TC8 & 900-TC16)

alt3 Alarm Type for Alarm 3 (900-TC8)

Conditions of Use: Alarm 2 and 3 must be configured and supported by the

controller hardware.

Function: These parameters allow you to configure the type of alarm

operation for Alarm Output 2 and Alarm Output 3.

• For Alarm 2 and 3, you can select Alarm types: Deviation, Deviation
range, Absolute Value, or PV change rate alarm (Note: cannot use
LBA).

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Related Parameters

• Alarm value 2 (page 5-17), Alarm value upper limit 2 (page 5-19), Alarm
value lower limit 2 (page 5-19) (Operation function group)
• Standby sequence reset (page 5-72), Auxiliary output * open in alarm:
(page 5-73), Alarm 2 hysteresis (page 5-62), Alarm 2 latch (page 5-79)
(Advanced Setting function group)
• Alarm value 3 (page 5-18), Alarm value upper limit 3 (page 5-20), Alarm
value lower limit 3 (page 5-20) (Operation function group)
• Standby sequence reset (page 5-72), Auxiliary output * open in alarm
(page 5-73), Alarm 3 hysteresis (page 5-62), Alarm 3 latch (page 5-79)
(Advanced Setting function group)
Table 5.BR — Details

Alarm Output Operation

When Alarm Value When Alarm Value
Set Value Alarm type X is Positive X is Negative
0 Alarm function OFF Output OFF
1➊ Upper- and Lower-Limit ON
L H ➋
(deviation range) OFF
SP

2 Upper-limit (deviation) ON
X
ON
X
OFF OFF
SP SP

3 Lower-limit (deviation) ON
X
ON
X
OFF OFF
SP SP

4➊ Upper- and Lower-Limit L H ➌

ON
range (deviation range) OFF
SP

5 ➊➎ Upper- and Lower-Limit ➍

L H
with standby sequence ON
OFF
(deviation range) SP

6 Upper-limit with standby ON

X X
ON
sequence (deviation) OFF
SP OFF
SP

7 Lower-limit with standby ON

X
ON
X
sequence (deviation) OFF
SP
OFF
SP

8 Absolute-value ON
X X
ON
Upper-Limit OFF
0 OFF
0

9 Absolute-value ON
X
ON
X
Lower-Limit OFF
0 OFF
0

10 Absolute-value ON
X X
ON
Upper-Limit with standby OFF
0 OFF
0
sequence
11 Absolute-value ON
X
ON
X
Lower-Limit with standby OFF
0 OFF
0
sequence

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 Parameter Functions & Definitions 5-61

Table 5.BR — Details

Alarm Output Operation

When Alarm Value When Alarm Value
Set Value Alarm type X is Positive X is Negative
12 Loop Break Alarm (LBA) —
(Alarm 1 Type only)
13 PV Change Rate Alarm —
Note: Shading indicates default setting. Set the alarm type independently for
each alarm in the Alarm 1 to 3 Type parameters in the Initial Setting function
group. The default is 2 (Upper-limit alarm).

➊ With set values 1, 4 and 5, the upper- and lower- limit values can be set independently for each alarm type, and
are expressed as “L” and “H.”
➋ Set value: 1 (Upper- and Lower-Limit alarm)
H < 0,
L H SP SP L H H SP L
H < 0,
H < 0, L > 0 H > 0, L < 0 H L SP |H| ≥
|H| < |L| |H| > |L|
H > 0,
SP H L |H| ≤
➌ Set value: 4 (Lower-Limit range)
H < 0, L <
L H SP SP L H H SP L

H < 0, L > 0 H > 0, L < 0 H < 0, L

|H| < |L| |H| ≥ |
|H| > |L| H L SP

H > 0, L <
SP H L |H| ≤ |L
➍ Set value: 5 (Upper- and Lower-Limit with standby sequence)
For the Lower-Limit alarms in cases 1 and 2 above, the alarm is normally OFF if upper- and Lower-Limit
hysteresis overlaps. In case 3, the alarm is always OFF.
➎ Set value: 5 (The alarm is always OFF if upper- and Lower-Limit alarm hysteresis with standby sequence
overlaps.)

Related Parameters

• Alarm Value 1…3 (Operation function group, page 5-16)

• Upper-Limit Alarm Value 1…3, Lower-Limit Alarm Value 1…3
(Operation function group, page 5-19)
• Standby Sequence Reset Method (page 5-72), Alarm 1…3 Open in
Alarm, Alarm 1…3 Hysteresis (page 5-61), Alarm 1…3 Latch
(Advanced Setting function group)

alh1 Alarm 1 Hysteresis

Conditions of Use: Alarm 1 must be assigned. The alarm 1 type must NOT
be 0, 12, or 13.

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alh2 Alarm 2 Hysteresis

Conditions of Use: Alarm 2 must be assigned. The alarm 2 type must NOT
be 0, 12, or 13.

alh3 Alarm 3 Hysteresis

Conditions of Use: Alarm 3 must be assigned. The alarm 3 type must NOT
be 0, 12, or 13.

Function: These parameters set the hysteresis (allowed deviation from the
configured alarm value) for alarms 1, 2, and 3.

Table 5.BS

Controller Models Configurable Range Units Default

Model with thermocouple/resistance 0.1...999.9 °C or °F 0.2
thermometer universal input
Model with analog input 0.01...99.99 %FS 0.02

Note: Set None as the unit for 0 to 50 millivolt.

Related Parameters

• Alarm value 1 to 3 (page 5-16), Alarm value upper limit 1 to 3 (page

5-18), Alarm value lower limit 1 to 3 (page 5-18) (Operation function
group)
• Alarm 1 to 3 type (Initial Setting function group, page 5-59)

tr-t Transfer Output Type (900-TC8, 900-TC16)

Conditions of Use: An analog current output must be assigned/configured

Function: This parameter allows you to configure the analog current output
for a specific type of transfer output. Refer to Table 5.BU.

Note: If the analog current output is NOT used as a transfer output, configure
this parameter to OFF (default).

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 Parameter Functions & Definitions 5-63

Table 5.BT — Transfer Output Destination

Transfer Output
Control Output 1 Type Control Output 2 Type Destination
Current Output • No Control Output 1
• Relay Output
• Voltage Output (for driving SSR)
• Relay Output • No No
• Voltage output (for • Relay Output
driving SSR) • Voltage Output (for driving SSR)

Note: Calibration is NOT supported for the transfer output.

Table 5.BU

Transfer Output Type Selection Default

OFF off off
Set point sp
Set point during SP ramp sp-m
PV pv
MV monitor (heating) mv
MV monitor (cooling) c-mv

Related Parameter
• Transfer Output Upper-Limit, Transfer Output Lower-Limit (Initial
Setting function group, page 5-63)

tr-h Transfer Output Upper-Limit

tr-l Transfer Output Lower-Limit

Conditions of Use: An analog current output must be assigned/configured.

The Transfer Output Type parameter must NOT be set to OFF.

Function: This parameter allows you to configure the Upper- and

Lower-Limit values specifically for the transfer output and separate from the
actual function (e.g., Set Point Limits).

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Table 5.BV

Default Transfer Output

Transfer
Output Type Configurable Range Lower-Limit Upper-Limit Units
Set Point SP Lower-Limit to SP Upper-Limit
Set Point during SP SP Lower-Limit to SP Upper-Limit SP Lower-Limit SP Upper-Limit
Ramp
PV Temperature Senor setting range Lower-Limit to Sensor Setting Sensor Setting EU
sensor setting range Upper-Limit Range Lower-Limit Range Upper-Limit
Analog Analog scaling Lower-Limit to analog Scaling Lower-Limit Scaling Upper-Limit
scaling Upper-Limit
MV Monitor Standard −5.0…105.0
(heating)
Heating/cooling 0.0…105.0
0.0 100.0 %
MV Monitor 0.0…105.0
(cooling)

Related Parameter
• Transfer Output Type (Initial Setting function group, page 5-62)

o1-t Linear Current Output (900-TC8, 900-TC16)

Conditions of Use: Control output 1 must be an analog current output.

Function: This parameter allows you to configure the output type for the
linear analog current outputs and select either 4…20 mA or 0…20 mA.

Table 5.BW

Analog Output Selection Types Default

4-20: 4…20 mA 4-20
0-20: 0…20 mA

Note: Even when control output 1 is used as a control output or transfer

output the 0 to 20 mA selection can be used.

Related Parameter

• Transfer Output Type (Initial Setting function group, page 5-62)

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 Parameter Functions & Definitions 5-65

ev-m Number of Multi-SP Uses (900-TC8, 900-TC16)

Conditions of Use: An event input unit must be assigned. An optional event

input unit must be installed in the controller.

Function: Multi-SP is a function for setting set points 0 to 3 in advance, and

switching between these set points using a combination of event input
ON/OFF signals. The number of Multi-SP Uses parameter is used to switch
between using two and four preset set points.

Table 5.BX

Configurable Range Default

0 to 2 1

Whether the Event Input Assignments 1 and 2 parameters are displayed or

hidden is determined by the Number of Multi-SP Uses parameter setting.

Table 5.BY — Controllers with Event Inputs 1 and 2 (Two Event Inputs)

Event Input Assignment 1 Event Input Assignment 2

Number or 0 Displayed (Multi-SP not used).
Multi-SP uses
1 Hidden (Multi-SP, 2 points) Displayed (Event input 2 not
used as multi-SP switch).
2 Hidden (Multi-SP, 4 points).

The following tables show the relationships between ON/OFF combinations

of event inputs 1 and 2 and selected set points.:

Table 5.BZ —Number of Multi-SP Uses: 1

Event input 1 Selected set point

OFF Set point 0
ON Set point 1

Table 5.CA — Number of Multi-SP Uses: 2

Event input 1 Event input 2 Selected set point

OFF OFF Set point 0
ON OFF Set point 1
OFF ON Set point 2
ON ON Set point 3

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The following table shows the functions assigned when an Event Input
Assignment (1 or 2) is displayed.

Table 5.CB

Selection Function
none None
stop RUN/STOP
manu Auto/Manual Switch
prst Program start (see note 1.)
drs Invert Direct/Reverse Operation
at-2 100% AT Execute/Cancel
at-1 40% AT Execute/ Cancel (see note 2)
wtpt Setting Change Enable/Disable
lat Alarm Latch Cancel

Note: 1 PRST (Program Start) can be configured even when the Program Pat-
tern parameter is configured to OFF, but the function will be dis-
abled.
Note: 2 This function can be configured for heating/cooling control, but the
function will be disabled.

• When any of the following functions are configured for an Event Input
Assignment parameter, the same function cannot be configured for
another Event Input Assignment parameter: STOP (RUN/STOP),
MANU (Auto/Manual Switch), PRST (Program Start), DRS (Invert
Direct/Reverse Operation), AT-2 (100% AT Execute/Cancel), AT-1
(40% AT Execute/Cancel), WTPT (Setting Change Enable/Disable), or
LAT (Alarm Latch Cancel).

Related Parameters

• SP0 to SP3 (Adjustment function group, page 5-33),

• Event input assignment 1 and 2 (Initial Setting function group, page
5-66), Multi-SP use (Advanced Setting function group, page 5-71)

Event Input Assignment (* 1 and 2) (900-TC8,

ev-* 900-TC16)

Conditions of Use: An event input unit must be installed in the controller.

Multi-SP must NOT be used.

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 Parameter Functions & Definitions 5-67

Function: The following functions can be assigned to event inputs 1 and 2:

• RUN/STOP
• Auto/Manual Switch
• Program Start
• Invert Direct/Reverse Operation
• 100% AT Execute/Cancel
• 40% AT Execute/Cancel
• Setting Change Enable/Disable
• Alarm Latch Cancel

Default:

• Event Input Assignment 1: none

• Event Input Assignment 2: stop.
Table 5.CC

Selection Function
none None
stop RUN/STOP
manu Auto/Manual
prst Program start (see note 1.)
drs Invert Direct/Reverse Operation
at-2 100% AT Execute/Cancel
at-1 40% AT Execute/ Cancel (see note 2)
wtpt Setting Change Enable/Disable
lat Alarm Latch Cancel

Note: 1 PRST (Program Start) can be configured even when the Program Pat-
tern parameter is configured to OFF, but the function will be dis-
abled.
Note: 2 This function can be configured for heating/cooling control, but the
function will be disabled.

Related Parameters

• SP0 to SP3 (Adjustment function group, page 5-33)

• Number of multi-SP uses (Initial Setting function group, page 5-65)

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5-68 Parameter Functions & Definitions

Extraction of Square Root Enable (900-TC8,

sqr 900-TC16)

Conditions of Use: An analog input must be supported.

Function: This parameter enables and disables square root extraction.

Table 5.CD

Setting Range Default

on: Enabled, off: disabled None

Related Parameter

• Extraction of square root low-cut point (Adjustment function group,

page 5-44)

amov
Move to Advanced Setting Function Group

Conditions of Use: The Initial Setting/Communications Protect parameter

must be set to 0.

Function: This parameter allows you to move to the Advanced Setting

function group by entering the value −169 when the parameter is displayed

Note: Once the value (–169) is displayed on the controller you can move to
the Advanced Setting function group either by pressing the M key or
O key or by waiting for 2 seconds to elapse.

Related Parameter

• Initial Setting/Communications Protect (Protect function group, page

5-4)

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 Parameter Functions & Definitions 5-69

Advanced Setting Function This function group is for using the Bulletin 900 controller to its maximum
capability.
Group
Figure 5.9
Power ON

Operation Adjustment
function group function group
Press the
O Key less than 1 s.

Press Press the C

the O Key O Key
for at
25 Press the O Key for at
least 3 s.
for at least 100
1 s. least 3 s.
Control stops.

Communi-
Initial Setting cations
function group Setting
function group
Press the
O Key for less than 1 s.

Press the O Key for Password input

at least 1 s. set value −169

Advanced Setting Control in progress

function group Control stopped

To move to this function group, enter the password (–169) in the Initial Setting
function group (refer to page 5-48 for details).

Note: In order to enter the password the Initial Setting/Communications

Protection must be set to 0.

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5-70 Parameter Functions & Definitions

Figure 5.10

Advanced Setting Function Group

M
Heater
init Parameter a1lt Alarm 1 Latch 5-79 hsu HS Alarm Use och Overcurrent 5-100
off Initialization 5-71 off on 5-88 0.1
Hysteresis
M M M M

mspu Multi-SP Uses a2lt Alarm 2 Latch hsl HS Alarm Latch pf PF Setting 5-101
off 5-71 off
5-79 off 5-89 a-m
M M M M

spru SP Ramp Time a3lt Alarm 3 Latch

5-79 hsh HS Alarm pfd1 Monitor/Setting 5-102
m Unit 5-71 off 0.1 Hysteresis 5-89 1 Item 1
M M M M

rest Standby
Sequence prlt Move to Protect lba LBA Detection pfd2 Monitor/Setting 5-102
a 5-72 3 Level Time 5-80 0 Time 5-90 0 Item 2
Reset
M M M M

sb1n Auxiliary Output sero Input Error 5-81

C
lbal LBA Level pfd3 Monitor/Setting 5-102
n-o 1 Open in Alarm 5-73 off Output 8.0 5-90 0 Item 3
M M
M M M
Cold Junction
sb2n Auxiliary Output 5-73 cjc Compensation 5-82
C
lbab LBA Band pfd4 Monitor/Setting 5-102
n-o 2 Open in Alarm on 3.0 5-91 0 Item 4
Method
M M M M

sb3n Auxiliary Output rlrv MB Command out1 Control Output 1 pfd5 Monitor/Setting 5-102
n-o 3 Open in Alarm 5-73 off Logic Switching 5-82 o Assignment 5-92 0 Item 5
M M M M

hbu HB ON/OFF colr PV Change out2 Control Output 2 spdp PV/SP Display 5-103
on 5-74 red Color 5-82 none Assignment 5-93 4 Screen Selection
M M M M

pv-b PV Stable sub1 Auxiliary Output 1

°c

hbl Heater Burnout odsl MV Display 5-103

offLatch 5-74 5.0 Band 5-84 alm1 Assignment 5-93 o Selection
M M M
M

hbh Heater Burnout a1on Alarm 1 ON sub2 Auxiliary Output 2 5-94 pvdp PV Decimal 5-104
0.1 Hysteresis 5-75 0 Delay 5-85 alm2 Assignment on Point Display
M M M M
C
st-b ST Stable a2on Alarm 2 ON sub3 Auxiliary Output 3 5-95 pvst PV Status 5-105
Range
15.0
5-75 0 Delay 5-85 alm3 Assignment off Display Function
M M M M

alfa α a3on Alarm 3 ON

0 Delay 5-85 csel Character
5-96
svst SV Status
Display Function
5-105
0.65 5-76 on Select off
M M M M

at-g AT Calculated a1of Alarm 1 OFF t-u Soak Time Unit d.ref Display Refresh 5-106
5-77 Delay 5-86 5-96 Period
0.8 Gain 0 m 0.25
M M M M
Control Output 1
C
at-h AT Hysteresis a2of Alarm 2 OFF alsp Alarm SP 5-97 ra1m ON/OFF Count 5-107
0.8 5-77 0 Delay 5-86 sp-m Selection 0
Monitor
M M M M
Control Output 2
lcma Limit Cycle MV a3of Alarm 3 OFF manl Manual MV Limit 5-97 ra2m ON/OFF Count 5-107
20.0 Amplitude 5-77 0 Delay 5-86 off Enable 0
Monitor
M M M
M
inf Input Digital istp Input Shift Type pvrp PV Rate of ra1 Control Output 1 5-107
0.0 Filter 5-77 in51 5-86 4 Change Calculation 5-98 0 ON/OFF Count
M M M Period M Alarm Set Value

pvad Additional PV mvse MV at Stop and csca Automatic Cooling 5-98 ra2 Control Output 2 5-108
off Display 5-78 off Error Addition 5-87 Coefficient 0ON/OFF Count
off
M M
M Adjustment M Alarm Set Value

o-dp MV Display 5-78 amad Auto/Manual 5-87 ocu Heater 5-99 rac ON/OFF Counter 5-108
off off Select Addition 0 Reset
onOvercurrent
M M M
M Use
ret Automatic 5-79
rt RT 5-88 ocl Heater 5-99
cmov Move to 5-109
Display Return off 0 Calibration
off off Overcurrent
Time M M function group
M M Latch

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 Parameter Functions & Definitions 5-71

init Parameter Initialize

Function: This parameter allows you to return/reset all of the controller’s

parameter settings to their initial/default values.

Table 5.CE

Parameter Selection Default

off: Initialization is not executed. off
fact: Initializes to the factory settings described in the manual.

mspu Multi-SP Uses

Conditions of Use: The controller must NOT have an event input option
unit installed or the Number of Multi-SP Uses parameter must be set to 0.

Function: This parameter allows you to configure the controller for multi-SP
selection (0…3) by operating the keys (D U) on the front of the controller.

If the option event input unit is mounted in the Bulletin 900 controller, this
parameter can be used only when the Number of Multi-SP Uses parameter is
set to 0 and Multi-SP Uses parameter is set to ON.

• on: You can select set points 0…3 from the controller’s keypad.
• off: You CANNOT select set points 0…3 from the controller’s
keypad.

Note: The default: off

Related Parameters
• Multi-SP Set Point Setting (Operation function group, page 5-10)
• Number of Multi-SP Uses (Initial Setting function group, page 5-65)

spru SP Ramp Time Units

Conditions of Use: The ST (Self-Tuning) parameter must be set to OFF.

Function: This parameter allows you to configure the time units for the rate
of change during a SP ramp operation which you previously enabled by
entering a value in the SP Ramp Set Value parameter (Adjustment function
group).

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5-72 Parameter Functions & Definitions

Table 5.CF

Configurable Range Default

s: EU/s, m: EU/min m

Related Parameters
• Ramp SP Monitor (Operation function group, page 5-10)
• SP Ramp Set Value (Adjustment function group, page 5-41)

rest Standby Sequence Reset Method

Conditions of Use: The Alarm Type for alarms 1…3 must be configured for
5, 6, 7, 10 or 11 (refer to Table 5.BR).

Note: Alarm 3 is not applicable for 900-TC16. Alarm 2 and 3 are not
applicable for 900-TC32.

Function: Recall that with standby sequence configured the alarm output is
temporarily disabled until AFTER the first alarm condition occurs. This
parameter allows you to configure the conditions (A or B) for enabling alarm
reset after the standby sequence of the alarm has been canceled.

The alarm output is turned OFF when switching to either the Initial Setting
function group, Communications Setting function group, Advanced Setting
function group, or Calibration function group (refer to Table 5.CG).

• Condition A: Control started (including power ON), and set point,

alarm value (upper/Lower-Limit alarm value) or input shift value
(upper/Lower-Limit temperature input shift value) changed

• Condition B: Power ON

The following example shows the reset action when the Alarm Type is
Lower-Limit alarm with standby sequence (refer to Figure 5.11).

Figure 5.11
Condition A only
SP change
Alarm point
(after change)
Alarm hysteresis

Condition A only : Standby sequence canceled point

Alarm point : Standby sequence reset point

Alarm output: Condition A

Alarm output: Condition B

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 Parameter Functions & Definitions 5-73

Table 5.CG

Selections Default Selection

a: Condition A a
b: Condition B

Related Parameters

• Alarm 1…3 Type(see note) (Initial Setting function group, page 5-59)
• Alarm 1…3 Latch (see note) (Advanced Setting function group, page
5-79)

Note: Alarm 3 is not applicable for 900-TC16. Alarm 2 and 3 are not
applicable for 900-TC32.

sb*n Auxiliary Output * Open in Alarm (* = 1 to 3)

Conditions of Use: Auxiliary output, 1, 2, or 3 must be assigned.

Function: This parameter allows you to configure the output states of

auxiliary outputs 1 to 3 ➊.When the Close in Alarm parameter is configured,
the status of the auxiliary output function is output unchanged with no alarm.
When Open in Alarm is configured, the status of the auxiliary output function
is reversed before being output. The following table shows the relationship
between the auxiliary output function, auxiliary output, and operation displays
(SUB1 to SUB3).

Table 5.CH

Alarm Parameter Auxiliary Physical Auxiliary Operation Display

Mode Output Function Output (SUB1 to SUB3)➊
Close in Alarm ON ON Lit
OFF OFF Not lit
Open in Alarm ON OFF Lit
OFF ON Not lit
➊ Auxiliary output 3 (SUB 3) is NOT available for the 900-TC16. Auxiliary output 2 and 3

(SUB 2 and 3) are NOT available for the 900-TC32.

Note: The shaded cell signifies the default setting.

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5-74 Parameter Functions & Definitions

hbu HB ON/OFF (900-TC8, 900-TC16)

Conditions of Use: The controller hardware that supports the Heater

Burnout (HB), Heater Short (HS), and Heater Overcurrent (HO), Alarm 1
must be configured and the appropriate number of Current Transformers
(CT) to support the application are connected to the controller.

Function: This parameter allows you to configure the operation of the Heater
Burnout Alarm (HBA).

Table 5.CI

Selections Default Selection

on: Alarm Enabled on
off: Alarm Disabled

hbl Heater Burnout Latch (900-TC8, 900-TC16)

Conditions of Use: The HB ON/OFF parameter must be configured to ON

and the controller hardware must support the Heater Burnout (HB), Heater
Short (HS), and heater overcurrent detection. Alarm 1 must also be configured
to ON. The appropriate number of Current Transformers (CT) to support the
application must be connected to the controller.

Function: When this parameter is configured to ON, the heater burnout

alarm is held ON until one of the following reset conditions are satisfied:

• The Alarm Output is turned OFF when switching to the Initial Setting
function group, Communications Setting function group, Advanced
Setting function group, or Calibration function group, or

• Heater burnout detection is set to 0.0 A, or

• Controller power is cycled from ON to OFF.

• The latch is canceled by the PF key (900-TC8 only). PF Setting = LAT:

Alarm Latch Cancel.

• The latch is canceled by an event input. (Event Input Assignment 1 and

2 = LAT: Alarm Latch Cancel).

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 Parameter Functions & Definitions 5-75

Table 5.CJ

Selections Default Selection

on: Latch Enabled off
off: Latch Disabled

Related Parameter

• HB ON/OFF (Advanced Setting function group, page 5-74)

• Event Input Assignment 1 and 2 (Initial Setting function group, page
5-66)

hbh Heater Burnout Hysteresis (900-TC8, 900-TC16)

Conditions of Use: The Heater Burnout ON/OFF parameter must be

configured to ON. The Heater Burnout Latch parameter must be set to OFF.
Support (e.g., CT) hardware must be available, and heater burnout, heater
short, and heater overcurrent detection supported. Alarm 1 must be assigned.

Function: This parameter allows you to configure the hysteresis (allowed

deviation from the HB, HS or heater overcurrent set point) when such a
condition is detected.

Table 5.CK

Configurable Range Units Default Value

0.1…50.0 A (Amps) 0.1

Related Parameter

• HB ON/OFF (Advanced Setting function group, page 5-74)

• Event Input Assignment 1 and 2 (Initial Setting function group, page
5-66)

st-b ST (Self-Tuning) Stable Range

Conditions of Use: Control must be configured for a temperature input,

standard control mode, PID control method, and Self-Tuning (ST) set to ON.

Function: This parameter allows you to configure the value for determining
the conditions under which ST (self-tuning) occurs. This parameter cannot be

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5-76 Parameter Functions & Definitions

used when the Self-Tuning (ST) parameter is set to OFF (refer to Table 5.CL
and Table 5.CL).

Table 5.CL — Self-Tuning Stable Range

Configurable Range Units Default Value

0.1…999.9 °C or °F 15.0

Note: Analog inputs do not apply to ST Stable Range because units are
°C or °F.

Related Parameters

• PID ON/OFF (Initial Setting function group, page 5-55)

• Input Type (Initial Setting function group, page 5-50)
• ST (Initial Setting function group, page 5-56)

alfa α

Conditions of Use: Control must be configured for 2-PID control method,

and the ST parameter must be set to OFF.

Function: This parameter allows you to configure the 2-PID constant for
alpha (α). Normally, use this parameter at its default.

Table 5.CM — Alpha

Configurable Range Units Default Value

0.00…1.00 None 0.65

Related Parameters

• PID ON/OFF (Initial Setting function group, page 5-55)

• ST (Initial Setting function group, page 5-56)

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 Parameter Functions & Definitions 5-77

at-g AT Calculated Gain

at-h AT Hysteresis

lcma Limit Cycle MV Amplitude

Conditions of Use: Control must be configured to 2-PID control. Normally
use the default values for these parameters

Function: The AT Calculated Gain parameter sets the gain when PID values
are calculated using AT. When emphasizing response, decrease the set value.
When emphasizing stability, increase the set value. The AT Hysteresis
parameter sets the hysteresis for limit cycle operation during auto tuning when
switching ON and OFF. The Limit Cycle MV Amplitude parameter sets the
MV amplitude for limit cycle operation during auto tuning.

Table 5.CN

Parameter Configuration Range Units Default

AT Calculated Gain 0.1...10.0 --- 0.8
AT Hysteresis Universal input: ° C or ° F 0.8 (see note)
0.1...999.9
Analog input 0.01...9.99 %FS 0.20
Limit Cycle MV Amplitude 5.0...50.0 % 20.0

Note: When temperature unit is °F, the default is 1.4.

Related Parameters

• AT execute/cancel (Adjustment function group, page 5-25)

inf Input Digital Filter

Function: This parameter allows you to configure the time constant of the
controller’s input digital filter. Figure 5.12 shows the effect on the input data
after passing through the digital filter.

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5-78 Parameter Functions & Definitions

Figure 5.12

PV before passing through filter

A

PV after passing through filter

0.63 A

Time Time
Constant

Input Digital Filter

Table 5.CO

Configurable Range Units Default Value

0.0…999.9 Seconds 0.0

puad Additional PV Display

Function: This parameter allows you to configure the controller so that only
the PV is displayed. It is added to the top of the Operation function group. It
gives you the option of displaying the PV and SP (normal) or just the PV.

Table 5.CP

Selections Default Selection

on: Displayed off
off: Not displayed

o-dp Manipulated Variable (MV) Display

Function: This parameter allows you to configure whether or not the

manipulated variable is displayed.

The manipulated variable is displayed when the Manipulated Variable monitor

(heating) and Manipulated Variable (cooling) parameters are set to ON, and
not displayed when these parameters are set to OFF.

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 Parameter Functions & Definitions 5-79

Table 5.CQ

Selections Default Selection

on: Displayed off
off: Not displayed

Related Parameters

• MV Monitor (heating) (page 5-21) MV Monitor (cooling) (page 5-22)

(Operation function group)

Ket Automatic Display Return Time

Function: If you do not operate any of the keys on the front panel for the
time set by this parameter in the Operation function group, Adjustment
function group, or Monitor function group, the display automatically returns
to the PV/SP display.

This function is disabled (display does not change automatically) when this
parameter is configured to OFF.

Table 5.CR

Configurable Range Units Default Value

OFF, 1…99 Seconds OFF

a1lt Alarm 1 Latch

a2lt Alarm 2 Latch
a3lt Alarm 3 Latch
Conditions of Alarm 1 Use: Alarm 1 function must be assigned and Alarm 1
Type must NOT be configured to 0.

Conditions of Alarm 2 Use: Alarm 2 function must be assigned and Alarm 2

Type must NOT be configured to 0 or 12.

Conditions of Alarm 3 Use: Alarm 3 function must be assigned and Alarm 3

Type must NOT be configured to 0 or 12. Controller must be 900-TC8 type.

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5-80 Parameter Functions & Definitions

Function: When this parameter is set to ON, the alarm function is held until
one of the following conditions are satisfied:

• The power to the controller is cycled.

• The latch is cancelled by the PF Key. (PF Setting = LAT: Alarm Latch
Cancel)
• The latch is cancelled by an event input.(Event Input Assignment 1 and
2 = LAT: Alarm Latch Cancel)
• The output is turned OFF when switching to the Initial Setting function
group, communications function group, Advanced Setting function
group, or calibration level.
• If an auxiliary output is set to close in alarm, the output is kept closed. If
it is set to open in alarm, it is kept open.
Table 5.CS

Selections Default Selection

on: ON off
off: OFF

Related Parameters

• Alarm Value 1 to 3 (Operation function group, page 5-16)

• Upper-Limit Alarm Value 1 to 3, Lower-Limit Alarm Value 1 to 3
(Operation function group, page 5-20)
• Alarm 1 to 3 Type (Initial Setting function group, page 5-59)
• Standby Sequence Reset Method (Advanced Setting function group,
page 5-72)
• Auxiliary Output 1 to 3 Open in Alarm, (Advanced Setting function
group, page 5-73)
• Event input assignment 1 and 2 (Initial Setting function group, page
5-66) HB ON/OFF: (page 5-74), PF setting: (page 5-101) (Advanced
Setting function group)

prlt Protect Function Group Move Time

Function: This parameter allows you to configure the control panel key
pressing time required to move to the Protect function group from the
Operation function group, Adjustment function group, or Monitor/Setting
function group.

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 Parameter Functions & Definitions 5-81

Table 5.CT

Configurable Range Units Default Value

1…30 Seconds 3

Related Parameters

• Operation/Adjustment Protection, Initial Setting/Communications

Protection, Setting Change Protection (Protect function group, page
5-1)

sero Input Error Output

Conditions of Use: Alarm 1 must be assigned.

Function: When this parameter is configured to ON, the output assigned to

the Alarm 1 output turns ON at an input error condition. Note, however, that
the Alarm 1 operation LED display does not light.

Note: For details on input errors, refer to Error displays.

The Alarm 1 output is:

• the ORed output of Alarm 1, HB Burnout alarm, HS Alarm, heater

overcurrent alarm and the input error.

• turned OFF when controller operation is switched to the Initial Setting

function group, Communications Setting function group, Advanced
Setting function group, or Calibration function group, and when
controller power is cycled ON to OFF.

Table 5.CU

Selections Default Selection

on: Enabled off
off: Disabled

Related Parameter

• Input Error (Error Display, page 6-1)

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5-82 Parameter Functions & Definitions

cGc Cold Junction Compensation Method

Conditions of Use: The Input Type must be thermocouple or non-contact

infrared temperature sensor.

Function: This parameter allows you to specify whether cold junction

compensation is to be performed internally by the controller or to be
performed externally when the Input Type setting value is 5 to 22, 24, or 25.

The cold junction compensation external setting is valid when the temperature
difference is measured using two thermocouples or two non-contact sensors.

Table 5.CV

Selections Default Selection

on: Internally on
off: Externally

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

rlrv MB Command Logic Switching

Note: Although this parameter is available, it is not used by the 900-TC8,

900-TC16, or 900-TC32 controller or configuration software. The
default is OFF and should remain unchanged.

colr PV Color Change

Function: The PV Color Change function allows you to change the color of
the PV display (No. 1 display) based upon preset conditions defined in Table
5.CW.

There are three display colors (orange, red, and green) that you can select
based on the following three modes listed below and eight settings shown in
Table 5.CW.

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 Parameter Functions & Definitions 5-83

Modes:

• Constant: This mode displays orange, red, or green all the time.
• Linked to Alarm 1: This mode switches the PV display color from red
to green when Alarm 1 turns ON or from green to red when Alarm 1
turns ON.
• Linked to PV Stable Band: This mode switches the PV display color
between red outside the PV Stable Band and green within PV Stable
Band, or between green outside the PV stable band and red within PV
stable band. Set the PV stable band in the PV Stable Band parameter in
the Advanced Setting function group.

Note: The default of the PV is red (red).

The following table shows the display functions that can be set using the PV
color change function.

Table 5.CW — Settings

Mode Setting Function PV Color Change Application Example

Constant org Orange Constant: Orange To match the display color with other
Controller models
red Red Constant: Red To match the display color with other
Controller models
grn Green Constant: Green To match the display color with other
Controller models
Linked to Alarm
Alarm 1 value
ON ALM1 lit

OFF PV
SP

ALM1 not lit ALM1 lit Application example

r-g Red to Green Red Green To display the PV reached signal
g-r Green to Red Green Red To display error signals

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5-84 Parameter Functions & Definitions

Table 5.CW — Settings

Mode Setting Function PV Color Change Application Example

Linked to PV Within Within
stable band PV stable PV stable
band band

Low Within High

PV
SP

Low PV stable band High Application example

r-g.r Red to Green Red Green Red To display stable status
to Red
g-o.r Green to Green Orange Red To display stable status
Orange to Red
o-g.r Orange to Orange Green Red To display stable status
Green to Red

Related Parameters

• PV Stable Band (Advanced Setting function group, page 5-84)

pv-b
PV Stable Band

Function: This parameter allows you to configure the PV Stable Band width
in °C, °F, or % full scale within which the PV display color is changed based on
your configuration of the PV Color Change parameter.

• When the mode to link to the PV stable band is selected with the PV
Color Change parameter, the PV display color will change according to
whether the present value (PV) is lower than, within, or higher than the
PV stable band, as shown in the following figure.

• There is a fixed hysteresis of 0.2 (°C or °F).

Figure 5.13
PV Stable PV Stable
Band Band

Low Within High

PV

0.2 (°C or °F) SP 0.2 (°C or °F)

When analog inputs are used: 0.02 (% FS).

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 Parameter Functions & Definitions 5-85

Table 5.CX

Configurable
Controller Models Range Units Default
Controllers with Thermocouple and 0.1…999.9 °C or °F ➊ 5.0
Resistance Thermometer (RTD) inputs
Controllers with Analog Inputs 0.01…99.99 %FS 5.00
➊
Set NONE as the unit for Controllers with Millivolt Inputs.

Related Parameter

• PV Color Change (Advanced Setting function group, page 5-82)

a1on Alarm 1 ON Delay

a2on Alarm 2 ON Delay
a3on Alarm 3 ON Delay

Conditions of Use: Alarm 1 must be assigned, and the Alarm 1 Type

parameter must NOT be 0, 12, or 13. Alarm 2 must be assigned, and the
Alarm 2 Type parameter must NOT be 0, 12, or 13. Alarm 3 must be assigned,
and the Alarm 3 Type parameter must NOT be 0, 12, or 13.

Function: When this parameter is enabled, Alarm 1, 2, or 3 outputs are

prevented from turning ON until after the delay times you configure in these
parameters has elapsed.

• To enable the alarm set the ON delay time at some value >0.
• To disable the ON delay, set 0.
Table 5.CY

Configurable Range Units Default

0…999 Seconds 0

Related Parameter

• Alarm 1…3 Type (Initial Setting function group, page 5-59)

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5-86 Parameter Functions & Definitions

a1of Alarm 1 OFF Delay

a2of Alarm 2 OFF Delay
a3of Alarm 3 OFF Delay

Conditions of Use: Alarm 1 must be assigned, and the Alarm 1 Type

parameter must NOT be 0, 12, or 13. Alarm 2 must be assigned, and the
Alarm 2 Type parameter must NOT be 0, 12, or 13. Alarm 3 must be assigned,
and the Alarm 3 Type parameter must NOT be 0, 12, or 13.

Function: Alarm 1, 2, or 3 outputs are prevented from turning OFF until

after the delay time you configure in these parameters has elapsed.

• To enable the alarm set the OFF delay to some value >0.
• To disable the OFF delay, set 0.
Table 5.CZ

Configurable Range Units Default

0…999 Seconds 0

Related Parameter

• Alarm 1…3 Type (Initial Setting function group, page 5-59)

istp Input Shift Type

Conditions of Use: The sensor Input Type must be a thermocouple or

resistance thermometer (RTD) input.

Function: This parameter allows you to configure the shift method for
thermocouple or resistance thermometer inputs.

• When the Input Type is thermocouple or resistance thermometer, set

either a 1-point shift or a 2-point shift.
Table 5.DA

Selections Default
ins1: 1-point shift, ins2: 2-point shift ins1

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 Parameter Functions & Definitions 5-87

Related Parameters

• Temperature Input Shift, Upper-Limit Temperature Input Shift Value,

Lower-Limit Temperature Input Shift Value (Adjustment function
group, page 5-34)
• Input Type (Initial Setting function group, page 5-50)

mvse MV at Stop and Error Addition

Conditions of Use: The control method must be configured to 2-PID

control.

Function: This parameter allows you to configure whether or not the MV at

Stop and MV at PV Error parameters are to be displayed on the controller.

Table 5.DB

Selections Default
on: Displayed, off: Not displayed off

Related Parameter

• MV at Stop, MV at PV Error (Adjustment function group, page 5-41)

amad Auto/Manual Selection Addition

Conditions of Use: The control method must be configured to 2-PID

control.

Function: This parameter allows you to configure whether the Auto/Manual

parameter is to be displayed on the controller.

Table 5.DC

Configurable Range Default

on: Displayed, off: Not displayed off

Related Parameter

• Auto/Manual Switch (Operation function group, page 5-10)

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5-88 Parameter Functions & Definitions

rt Robust Tuning (RT)

Conditions of Use: The control method must be configured to 2-PID

control. The Input Type must be configured to temperature input.

Function: This parameter executes robust tuning (RT).

• When Auto-tuning (AT) or Self-tuning (ST) is executed with RT

selected, PID constants are automatically set which make it hard for
control performance to degenerate even when control object
characteristics have changed.

• Even when hunting occurs for PID constants when AT or ST is

executed in normal mode, it is less likely to occur when AT or ST is
executed in RT mode.

Table 5.DD

Selections Default
on: RT function OFF, off: RT function ON off

Related Parameters

• AT Execute/Cancel (page 5-25), Proportional Band, Integral Time,

Derivative Time (page 5-35) (Adjustment function group)
• PID ON/OFF (page 5-55), ST (page 5-56) (Initial Setting function
group)

Heater Short Alarm (HSA) Use

hsu (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short Alarms (HSA), and
heater overcurrent detection must be supported. Alarm 1 must be assigned.
Optional controller hardware and/or support hardware (e.g., CTs) must be
installed.

Function: This parameter allows you to enable the controller to support the
Heater Alarm functions

Table 5.DE

Configurable Range Default

on: Enabled, off: Disabled on

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Heater Short Alarm (HSA) Latch

hsl (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA), Heater Short Alarms (HSA), and
heater overcurrent detection must be supported. Alarm 1 must be assigned.
The HS Alarm parameter must be set to ON. Optional controller hardware
and/or support hardware (e.g., CTs) must be installed.

Function: When the Alarm Latch parameter is set to ON, the HS alarm is
held until either of the following conditions is satisfied:

• The HS alarm current is set to 50.0 A.

• The controller power is turned OFF then back ON again (e.g., power is
reset).
• The latch id canceled by the PF key (900-TC8 only). PF Setting = LAT:
Alarm Latch Cancel.
• The latch is canceled by an event input (event input assignment 1 and 2
= LAT: Alarm Latch Cancel).

Note: The Alarm output is also turned OFF when switching to the Initial
Setting function group, Communications Setting function group,
Advanced Setting function group, or Calibration function group.

Table 5.DF

Selections Default
on: Enabled, off: Disabled off

Related Parameter

• HS Alarm Use (Advanced Setting function group, page 5-88)

• Event Input Assignment 1 and 2 (Initial Setting function group, page
5-66)
• HB ON/OFF, PF Settings (Advanced Setting function group, page
5-74)

Heater Short Alarm (HSA) Hysteresis

hsh (900-TC8, 900-TC16)

Conditions of Use: Heater Burnout (HBA) and Heater Short Alarms (HSA)
must be supported. Alarm 1 must be assigned. The HSA parameter must be
set to ON. The HS Alarm Latch must be set to OFF. Optional controller
hardware and/or support hardware (e.g., CTs) must be installed.

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5-90 Parameter Functions & Definitions

Function: This parameter allows you to configure the hysteresis (allowed

deviation from setting) for the operation of the Heater Short Alarm (HSA).

Table 5.DG

Configurable Range Units Default

0.1…50.0 A (Amps) 0.1

Related Parameter

• HS Alarm Use (Advanced Setting function group, page 5-88)

lba Loop Break Alarm (LBA) Detection Time

Conditions of Use: Alarm 1 must be assigned. The Alarm Type must be set
to 12 (LBA).

Function: This parameter allows you to enable or disable the LBA function
and set the detection time interval. To disable the LBA function, set it to 0.

Table 5.DH

Configuration Range Units Default

0…9999 Seconds 0

Note: For more details concerning the LBA Detection Time refer to
Section 4, Loop Break Alarm on page 4-47.

Related Parameters

• Alarm 1 Type (Initial Setting function group, page 5-59)

• LBA Level (page 5-90), LBA Band (page 5-91) (Advanced Setting
function group)

lbal Loop Break Alarm (LBA) Level

Conditions of Use: Alarm 1 must be assigned. The Alarm Type must be set
to 12 (LBA). The LBA detection time must NOT be 0.

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 Parameter Functions & Definitions 5-91

Function: This parameter allows you to configure the SP and PV process

condition for the LBA Level parameter.

• If the deviation between the SP and PV exceeds the LBA Level, a

control loop error is detected.
Table 5.DI

Configurable
Controller Models Range Units Default
Controllers with Thermocouple and 0.1…999.9 °C or °F ➊ 8.0
Resistance Thermometer (RTD) Inputs
Controllers with Analog Inputs 0.01…99.99 %FS 10.00
➊ Set NONE as the unit for Controllers with 0… 50 Millivolt Inputs.

Related Parameters

• Process Value/Set Point (Operation function group, page 5-8)

• Alarm 1 Type (Initial Setting function group, page 5-59)
• LBA Detection Time (page 5-90), LBA Band (page 5-91) (Advanced
Setting function group)

lbab Loop Break Alarm (LBA) Band

Conditions of Use: Alarm 1 must be assigned. The Alarm Type parameter

must be set to 12 (LBA). The LBA Detection Time must NOT be 0.

Function: This parameter allows you to configure the LBA band.

• If a control deviation greater than the LBA Band is not reduced when
the LBA Level is exceeded, a control loop error is detected.
Table 5.DJ

Configurable
Controller Models Range Units Default
Controllers with Thermocouple and 0.0…999.9 °C or °F ➊ 3.0
Resistance Thermometer (RTD) Inputs
Controllers with Analog Inputs 0.00…99.99 %FS 0.20
➊ Set NONE as the unit for Controllers with 0… 50 Millivolt Inputs.

Note: For more details concerning the LBA Band, refer to Section 4, Loop
Break Alarm on page 4-47.

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5-92 Parameter Functions & Definitions

Related Parameters

• Process Value/Set Point (Operation function group, page 5-8)

• Alarm 1 Type (Initial Setting function group, page 5-59)

• LBA Detection Time, LBA Level (Advanced Setting function group,

page 5-90)

out1 Control Output 1 Assignment

Conditions of Use: The Transfer Output Type parameter must be set to OFF
when the Control Output is an analog current output.

Function: This parameter allows you to configure the output function

assigned to Control Output 1.

Table 5.DK

Control Output 1 Function Default

None: No control output function is assigned o
o: Heating control output is output
c-o: Cooling control output is output➊
alm1: Alarm 1 is output➋
alm2: Alarm 2 is output➋
alm3: Alarm 3 is output➋
p.end: Program end is output➋➌
ralm: Control output ON/OFF count alarm➋
➊ If c-o (cooling Control Output) is assigned for standard control, a value equivalent to 0% is output.
➋ Can be selected for relay and voltage outputs only
➌ Can be selected only when the program pattern is not set to OFF, but the function is disabled.

Related Parameters

• Standard or Heating/Cooling (page 5-55), Program Pattern (page 5-57),

Transfer Output Type (page 5-62) (Initial Setting function group)

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 Parameter Functions & Definitions 5-93

out2 Control Output 2 Assignment (900-TC8 &

900-TC16)
Conditions of Use: Control Output 2 must be assigned/available. For a list of
controllers or option units that provide Control Output 2 functionality refer to
Tables 1.B and 1.E.

Function: This parameter sets the function to be assigned to Control

Output 2.

Table 5.DL

Control Output 2 Function Default

none: No function is assigned to control output 2 none ➌
o: Heating control output is output
c-o: Cooling control output is output➊
alm1: Alarm 1 is output
alm2: Alarm 2 is output
alm3: Alarm 3 is output
p.end: Program end is output➋
ralm: Control output ON/OFF count alarm
➊ If c-o is assigned for standard control, a value equivalent to 0% will be output.
➋ Can be selected only when the program pattern is not set to OFF, but the function is disabled.
➌ If the Standard or Heating/Cooling parameter is set to heating/cooling control, control automatically switches
to c-o.

Related Parameters

• Standard or Heating/Cooling (page 5-55), Program Pattern (page 5-57),

(Initial Setting function group)

sub1 Auxiliary Output 1 Assignment

Conditions of Use: Auxiliary Output 1 must be assigned.

Function: This parameter allows you to configure the function assigned to

Auxiliary Output 1.

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5-94 Parameter Functions & Definitions

Table 5.DM

Auxiliary Output 1 Function Default

none: No function is assigned to auxiliary output 1 alm1 ➌
o: Heating Control Output is output
c-o: Cooling Control Output is output ➊➍
alm1: Alarm 1is output
alm2: Alarm 2 is output
alm3: Alarm 3 is output (900-TC8 only)
p.end: Program end is output ➋
ralm: Control output ON/OFF count alarm ➌
➊ If c-o is assigned for standard control, a value equivalent to 0% will be output.
➋ Can be selected only when the program pattern is not set to OFF, but the function is disabled.
➌ If a setting is changed when the Program Pattern parameter is not set to OFF, control automatically switches to
p.end.
➍ If the Standard or Heating/Cooling parameter is set to heating/cooling control, this parameter will automatically
be set to c-6 (900-TC32).

Related Parameter

• Program Pattern (Initial Setting function group, page 5-57)

Auxiliary Output 2 Assignment

sub2 (900-TC8, 900-TC16)

Conditions of Use: Auxiliary Output 2 must be assigned.

Function: This parameter allows you to configure the function assigned to

Auxiliary Output 2.

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 Parameter Functions & Definitions 5-95

Table 5.DN

Auxiliary Output 2 Function Default

none: No function is assigned to auxiliary output 2 alm2➌
(see note to
o: Heating Control Output is output
follow)
c-o: Cooling Control Output is output➊
alm1: Alarm 1is output
alm2: Alarm 2 is output
alm3: Alarm 3 is output
p.end: Program end is output➋
ralm: Control output ON/OFF count alarm➋
➊ If c-o is assigned for standard control, a value equivalent to 0% will be output.
➋ Can be selected only when the program pattern is not set to OFF.
➌ If the Standard or Heating/Cooling parameter is set to heating/cooling control when there is no Control
Output 2 (900-TC16), control automatically switches to c-o.

Note: If the Standard or Heating/Cooling parameter is set to heating/cooling

control, this parameter will automatically be set to c-o (900-TC32).

Related Parameters

• Standard or Heating/Cooling (page 5-55), Program Pattern (page 5-57),

(Initial Setting function group)

sub3
Auxillary Output 3 Assignment

Conditions of Use: Auxiliary Output 3 must be assigned (900-TC8 only).

Function: This parameter allows you to configure the function assigned to

Auxiliary Output 3.

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5-96 Parameter Functions & Definitions

Table 5.DO

Auxiliary Output 3 Function Default

none: No function is assigned to auxiliary output 3 alm3 ➌
o: Heating Control Output is output
c-o: Cooling Control Output is output➊
alm1: Alarm 1is output
alm2: Alarm 2 is output
alm3: Alarm 3 is output
p.end: Program end is output➋
ralm: Control output ON/OFF count alarm➋
➊ If c-o is assigned for standard control, a value equivalent to 0% will be output.
➋ Can be selected only when the program pattern is not set to OFF, but the function is disabled.
➌ If the Standard or Heating/Cooling parameter is set to heating/cooling control when there is no Control Output
2 (900-TC8), control automatically switches to c-o.

Related Parameters

• Standard or Heating/Cooling (page 5-55), Program Pattern (page 5-57),

(Initial Setting function group)

csel Character Select LED

Function: This parameter allows you to select the LED display type for your
controller. The following two types of displays are available:

• 11-segment display
• 7-segment display

Table 5.DP

Selections Default
on: 11-segment display, off: 7-segment display on

When set to on, an 11-segment display is used.

t-u Soak Time Units

Conditions of Use: The Program Pattern parameter must NOT be set to

OFF.

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 Parameter Functions & Definitions 5-97

Function: This parameter allows you to configure the units of time used for
the soak time when the simple program function is used.

Table 5.DQ

Selections Default
m: Minutes, h: Hours m

Related Parameters

• Program Start, Soak Time Remain (Operation function group, page

5-15)
• Soak Time, Wait Band (Adjustment function group, page 5-40)
• Program Pattern (Initial Setting function group, page 5-57)

alsp Alarm SP Selection

Conditions of Use: Alarm 1, 2, and 3 functions must be assigned. The SP

Ramp Set Value must NOT be set to OFF. The ST parameter must be set to
OFF. The Alarm Type parameter must set to 1, 2, 3, 4, 5, 6, or 7.

Function: This parameter allows you to configure whether the set point that
triggers a deviation alarm during SP ramp operation is the ramp SP or target
SP.

Selections Default
sp-m: Ramp SP, sp: SP sp-m

Related Parameters

• SP Ramp Set Value (Adjustment function group, page 5-41)

• ST (Initial Setting function group, page 5-56)

manl Manual MV Limit Enable

Conditions of Use: The control must be set to 2-PID control.

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Function: This parameter allows you to configure whether the MV Upper

Limit and MV Lower Limit parameters are to be enabled when in manual
mode.

Table 5.DR

Selections Default
on: Enabled, off: Disabled off

Related Parameter

• MV upper limit, MV lower limit (Adjustment Level function group,

page 5-42)

pvrp PV Rate of Change Calculation Period

Conditions of Use: Alarms 1, 2, and 3 must be assigned. The alarm type must
be set to 13.

Function: The change width (rate of change) can be found for PV input
values in any set time period. Differences with previous values in each set
period are calculated, and an alarm is output if the results exceed the alarm
value.

The PV rate of change calculation period can be set in units of 250 ms

(sampling period).

Table 5.DS

Configurable Range Units Default

1 to 999 Sampling period 4 (1 s)

Related Parameter

• Present value, Process value/set point (Operation function group, page

5-8) Alarm 1 to 3 type (Initial Setting function group, page 5-16)

csca Automatic Cooling Coefficient Adjustment

Conditions of Use: The control must be set to heating/cooling control and

2-PID control.

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 Parameter Functions & Definitions 5-99

Function: By setting the Automatic Cooling Coefficient Adjustment

parameter to ON, autotuning can be executed during heating/cooling control
to automatically calculate the cooling coefficient at the same time as the PID
parameters. If there is strong non-linear gain for the cooling characteristics,
such as when cooling water boils for cooling control, it may not be possible to
obtain the optimum cooling coefficient at the Controller, and control may take
the form of oscillating waves. If that occurs, increase the proportional band or
the cooling coefficient to improve control.

Table 5.DT

Selections Default
on: Enabled, off: Disabled off

Related Parameter

• Cooling coefficient (Adjustment function group, page 5-36)

ocu Heater Overcurrent Use (900-TC8, 900-TC16)

Conditions of Use: Heater burnout, HS alarms, and heater overcurrent

detection must be supported. Alarm 1 must be assigned.

Function: Configure this parameter to use the heater overcurrent alarm.

The PV rate of change calculation period can be set in units of 250 ms

(sampling period).

Table 5.DU

Selections Default
on: Enabled, off: Disabled on

ocl Heater Overcurrent Latch (900-TC8, 900-TC16)

Conditions of Use: Heater burnout, HS alarms, and heater overcurrent

detection must be supported (two CTs). Alarm 1 must be assigned.

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5-100 Parameter Functions & Definitions

Function: When you configure this parameter to ON, the HS alarm is held
until any of the following conditions is satisfied:

• Heater overcurrent detection is set to 50.0 A.

• The controller power is cycled.
• The latch is cancelled by the PF Key. (900-TC8) PF Setting = LAT:
Alarm Latch Cancel
• The latch is cancelled by an event input. (Event Input Assignment 1 and
2 = LAT: Alarm Latch Cancel)

Note: The output is turned OFF when switching to the Initial Setting function
group, Communications function group, Advanced Setting function
group, or calibration function group.

Table 5.DV

Selections Default
on: Enabled, off: Disabled off

Related Parameters

• Heater overcurrent detection 1, Heater overcurrent detection 2

(Adjustment function group, page 5-26)
• Heater overcurrent use (Advanced Setting function group, page 5-99)
Heater overcurrent hysteresis (Advanced Setting function group, page
5-100)
• Event input assignment 1 and 2 (Initial Setting function group, page
5-66)
• HB ON/OFF: page 5-74, PF setting (Advanced Setting function group,
page 5-101)

Heater Overcurrent Hysteresis

och (900-TC8, 900-TC16)

Conditions of Use: Heater burnout, HS alarms, and heater overcurrent

detection must be supported, and alarm 1 must be assigned. The Heater
Overcurrent Use parameter must be set to ON, and the Heater Overcurrent
Latch parameter must be set to OFF.

Function: This parameter allows you to configure the hysteresis (allowed

deviation from setting) for heater overcurrent detection.

Table 5.DW

Configurable Range Units Default

0.1 to 50.0 A 0.1

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 Parameter Functions & Definitions 5-101

Related Parameters

• Heater overcurrent use (Advanced Setting function group, page 5-99)

pf PF Setting

Conditions of Use: The PF Key must be supported (900-TC8)

Function: This parameter allows you to configure which function the PF Key
will have.

Table 5.DX

Set Value Setting Function

OFF: off Disabled Does not operate as a function key
RUN: run RUN Specifies RUN status.
STOP: stop STOP Specifies STOP status.
R-S: r-s Reversing Specifies Reversing RUN/STOP operation status.
RUN/STOP
operation
AT-2: at-2 100% AT Specifies reversing 100% AT Execute/Cancel
Execute/Cancel status ➊
AT-1: at-1 40% AT Specifies reversing 40% AT Execute/Cancel
Execute/Cancel status ➊
LAT: lat Alarm Latch Specifies canceling alarm latches ➋
Cancel
A-M: a-m Auto/Manual Specifies reversing Auto/Manual status ➌
PFDP: pfdp Monitor/Setting Specifies the monitor/setting item display. Select
Item the monitor/setting item using the
Monitor/Setting Item 1 to 5 parameters
(Advanced Setting function group).
➊ When AT cancel is specified, it means that AT is cancelled regardless of whether the AT currently being
executed is 100% AT or 40% AT.
➋ Alarms 1 to 3, heater burnout, HS alarms, and heater overcurrent latches are cancelled.
➌ For details on auto/manual operations using the PF Key, refer to Performing Manual Control

Related Parameters

• Monitor/setting item 1 to 5 (Advanced Setting function group, page

5-102)

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5-102 Parameter Functions & Definitions

pfd* Monitor/ Setting Item * (*: 1 to 5)

Conditions of Use: The PF Setting parameter must be configured to PFDP.

Function: When you configure the PF Key parameter to Monitor/Setting

Item it enables using the function key to display monitor/setting items. The
items that will be displayed are configured using the Monitor/Setting Item 1 to
5 parameters. The settings are listed in the following table.

Table 5.DY

Remarks
Set Value Parameter Monitor/Setting Symbol
0 Disabled ---
1 PV/SP/Multi-SP Can be set. (SP) ---
2 PV/SP/MV Can be set. (SP) ---
3 PV/SP/Soak time remain Can be set. (SP) ---
4 Proportional band (P) Can be set. p
5 Integral time (I) Can be set. c
6 Derivative time (D) Can be set. d
7 Alarm value 1 Can be set. al-1
8 Alarm value upper limit 1 Can be set. al 1h
9 Alarm value lower limit 1 Can be set. al il
10 Alarm value 2 Can be set. al-2
11 Alarm value upper limit 2 Can be set. al2h
12 Alarm value upper limit 2 Can be set. al2l
13 Alarm value lower limit 2 Can be set. al-3
14 Alarm value 3 Can be set. al3h
15 Alarm value upper limit 3 Can be set. al3l

Note: The MV for heating and cooling control is set in the MV Display
Selection parameter.

Related Parameter

• PF Setting (page 5-101), MV Display Selection (page 5-103) (Advanced

Setting function group)

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 Parameter Functions & Definitions 5-103

spdp PV/SP Display Screen Selection

Conditions of Use: The No. 3 display must be supported (900-TC8)

Function: This parameter allows you to configure what will be displayed on

the PV/SP Screen No. display and the order of the display. The default is 4.

Note: A 2- level display is set at the time of shipping from the factory (set
value = 0). A 3- level display is activated if parameters are initialized (set
value =4).

Table 5.DZ

Set Value Display Contents

0 Only PV/SP is displayed (with no No. 3 display).
1 PV/SP/Multi-SP and PV/SP/MV are displayed in order ➊
2 PV/SP/MV and PV/SP/Multi-SP are displayed in order ➊
3 Only PV/SP/Multi-SP is displayed.
4 PV/SP/MV is displayed ➊
5 PV/SP/Multi-SP and PV/SP/Soak time remain are displayed in order ➊
6 PV/SP/MV and PV/SP/Soak time remain are displayed in order ➊
7 Only PV/SP/Soak time remain is displayed.
➊ The MV for heating and cooling control is configured in the MV Display Selection parameter.

Related Parameter

• Process Value Set Point (Operation function group, page 5-8)

• MV Display Selection (Advanced Setting function group, page 5-103)

odsl MV Display Selection

Conditions of Use: The No. 3 display must be supported(900-TC-8). Heating

and cooling control must be used. The PV/SP Display Screen Selection
parameter must be set to 1, 2, 4, or 6, or the Monitor/Setting Item 1 to 5
parameter must be set to 2.

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Function: This parameter allows you to select the MV display for PV/SP/MV
during heating and cooling control. Either heating MV or cooling MV can be
selected.

Table 5.EA

Selections Default
o: MV (heating)
o
c-o: MV (cooling)

pvdp PV Decimal Point Display

Conditions of Use: The input type must be set to temperature input.

Function: The display below the decimal point in the PV can be hidden for
temperature inputs. The PV decimals below the decimal point can be hidden
by setting the PV Decimal Point Display parameter to OFF. When this
parameter is set to ON, the display below the decimal point will appear
according to the input type setting.

Table 5.EB

Selections Default
on:ON, off: OFF ON

Related Parameter

• Input Type (Initial Setting function group, page 5-50)

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 Parameter Functions & Definitions 5-105

pvst PV Status Display Function

Function: The PV in the No. 1 display for the PV/SP, PV, or PV/Manual MV
Screen is alternately displayed in 0.5-second cycles with the control and alarm
status specified for the PV status display function.

Table 5.EC

Selections Default
off: No PV status display
manu: MANU is alternately displayed during manual control.
stop: STOP is alternately displayed while operation is stopped.
alm1: ALM1 is alternately displayed during Alarm 1 status.
alm2: ALM2 is alternately displayed during Alarm 2 status. off

alm3: ALM3 is alternately displayed during Alarm 3 status.

alm: ALM is alternately displayed when Alarm 1, 2, or 3 is set to ON.
ha: HA is alternately displayed when a heater burnout alarm, HS alarm, or
heater overcurrent alarm is ON.

Related Parameter

• Process value/set point, PV (Operation function group, page 5-8)

• PV/MV (manual MV) (Manual Control function group, page 5-47)

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5-106 Parameter Functions & Definitions

svst SV Status Display Function

Function: The SP, Blank, or Manual MV in the No. 2 display for the PV/SP,
PV, or PV/Manual MV Screen is alternately displayed in 0.5-second cycles
with the control and alarm status specified for the SV status display function.

Table 5.ED

Selections Default
off: No SV status display
manu: MANU is alternately displayed during manual control.
stop: STOP is alternately displayed while operation is stopped.
alm1: ALM1 is alternately displayed during Alarm 1 status.
alm2: ALM2 is alternately displayed during Alarm 2 status. off

alm3: ALM3 is alternately displayed during Alarm 3 status.

alm: ALM is alternately displayed when Alarm 1, 2, or 3 is set to ON.
ha: HA is alternately displayed when a heater burnout alarm, HS alarm, or
heater overcurrent alarm is ON.

Related Parameter

• Process value/set point, PV (Operation function group, page 5-8)

• PV/MV (manual MV) (Manual Control function group, page 5-47)

d.ref Display Refresh Period

Function: This parameter delays the display refresh period for monitor values.
Only display refreshing is delayed, and the refresh period for process values
used in control is not changed. This function is disabled by setting the
parameter to OFF.

Table 5.EE

Selections Units Default

OFF, 0.25, 0.5, 1.0 Second 0.25

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ra 1m
Control Output 1 ON/OFF Count Monitor

Conditions of Use: Control output 1 must be supported. Relay or voltage

outputs (for driving SSR) must be used. The Control Output 1 ON/OFF
Count Alarm Set Value parameter must NOT be set to 0.

Function: This parameter monitors the number of times that control output 1
is turned ON and OFF. This function is not displayed when the set value is 0,
or when the control output is a linear (analog) output.

Table 5.EF

Monitor Range Units

0 to 9999 100 times

ra2m
Control Output 2 ON/OFF Count Monitor
(900-TC8 & 900-TC16)

Conditions of Use: Control output 2 must be supported. Relay or voltage

outputs (for driving SSR) must be used. The Control Output 2 ON/OFF
Count Alarm Set Value parameter must NOT be set to 0.

Function: This parameter monitors the number of times that control output 2
is turned ON and OFF. This function is not displayed when the set value is 0,
or when the control output is a linear (analog) output

Table 5.EG

Monitor Range Units

0 to 9999 100 times

Control Output 1 ON/OFF Count Alarm Set

ra 1 Value (900-TC8, 900-TC16)

Conditions of Use: Control output 1 must be supported. Relay or voltage

outputs (for driving SSR) must be used.

Function: An ON/OFF count alarm occurs when the ON/OFF counter

exceeds the value set for this parameter. It is possible to assign ON/OFF

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5-108 Parameter Functions & Definitions

count alarms to auxiliary outputs and to have them displayed on the screen.
This function is disabled when the set value is 0.

Table 5.EH

Configurable Range Units Default

0 to 9999 100 times 0

Related Parameter

• Control output 1 ON/OFF count monitor (Advanced Setting function

group, page 5-107)

ra 2 Control Output 2 ON/OFF Count Alarm Set

Value (900-TC8, 900-TC16)

Conditions of Use: Control output 2 must be supported. Relay or voltage

outputs (for driving SSR) must be used.

Function: An ON/OFF count alarm occurs when the ON/OFF counter

exceeds the value set for this parameter. It is possible to assign ON/OFF
count alarms to auxiliary outputs and to have them displayed on the screen.
This function is disabled when the set value is 0.

Table 5.EI

Configurable Range Units Default

0 to 9999 100 times 0

Related Parameter

• Control output 2 ON/OFF count monitor (Advanced Setting function

group, page 5-107)

rac ON/OFF Counter Reset

Conditions of Use: Control outputs 1 and 2 must be supported. Relay or

voltage outputs (for driving SSR) must used.

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 Parameter Functions & Definitions 5-109

Function: This parameter resets the ON/OFF counter for specified control
outputs.

Table 5.EJ

Selections Default
0: Disable the counter reset function
1: Reset the control output 1 ON/OFF counter 0
2: Reset the control output 2 ON/OFF counter

Note: After the counter has been reset, the count value will be automatically
returned to 0.

Related Parameter

• Control output 1 ON/OFF count monitor, Control output 2 ON/OFF

monitor (Advanced Setting function group, page 5-107)

cmov Move to Calibration Group

Conditions of Use: Initial Setting/Communications Protect parameter must

be set to 0.

Function: This parameter allows you to configure the Password to Move to

the Calibration function group.

• Set the Password to Move to the Calibration function group. The

password is 1201.
• Move to the Calibration function group either by pressing the M key or
the O key or by waiting for 2 seconds to elapse.

Related Parameter

• Initial Setting/Communications Protect (Protect function group, page

5-4)

Communications Setting This function group allows you to configure the controller’s communication
parameters, enabling interface to a personal computer that is running the
Function Group controller configuration or monitoring software. The controller hardware must
support communications through a RS232 option module (900-TC8) or
RS485 option module (900-TC8, 900-TC16, and 900-TC32).

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5-110 Parameter Functions & Definitions

Figure 5.14
Power ON
Started in automatic mode.

Operation
Function Group
Press the Key
for less than 1 second.
Press the Key for at least
Press the Key C 1 second. The display will flash.
for at least 1 second. 25 Press the Key
100 for at least 3 seconds.
1 Control Stops

Communications
Initial Setting Setting
Function Group Function Group

Press the Key

for less than 1 second.
1 Operation function group entered for software reset.

psel Protocol Setting

u-no Communications Unit No.
bps Communications Baud Rate
len Communications Data Length
sbit Communications Stop Bits
prty Communications Parity
sdwe Send Data Wait Time

Conditions of Use: The Communications function must be supported by the

controller.

Function: These parameters allow you to match the communications

specifications of the controller(s) with the personal computer which has the
appropriate configuration or communication software. If a 1:N connection is
being used (RS-485), ensure that the communications specifications for all
devices in the system are the same except for the unit number. Each device
needs an individual unit number for RS-485 communication.

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 Parameter Functions & Definitions 5-111

Note: Each parameter is enabled when the controller power is reset.

Table 5.EK

Parameter Symbol Selection or Configurable Values Settings Default

Protocol Setting psel cwf, mod 900-TC or Modbus cwf
Communications Unit No. u-no 0…99 0…99 1
Communications Baud Rate bps 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, or 57.6 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, or 9.6
(kbit/s) 57.6 (kbit/s)
Communications Data Length len 7, 8 (bit) 7, 8 (bit) 7
Stop Bits sbit 1, 2 1, 2 2
Communications Parity prty None, Even, Odd None, Even, Odd even
Send Data Wait Time sdwt 0…99 0…99 (ms) 20

Related Parameters

• Communications Writing (Adjustment function group, page 5-26)

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5-112 Parameter Functions & Definitions

Notes:

Publication 900-UM007D-EN-E - January 2011

 Chapter 6

Troubleshooting & Error Indication

Error Displays When an error occurs, the error contents are shown on the controller’s No. 1
or No. 2 display.

This section describes how to check error codes on the display, and the actions
to be taken to remedy the problems.

s.err Input Error

Meaning

The input value has exceeded the control range (refer to Note).

Note: Control Range

Resistance thermometer (RTD), thermocouple input:

– Temperature setting Lower-Limit − 20 °C to temperature setting

Upper-Limit + 20 °C (Temperature setting Lower-Limit −40 °F to
temperature setting Upper-Limit +40 °F)
– Analog input: −5% to +105% of scaling range

Action

Check the wiring of inputs for incorrect wiring polarity for improper or
incorrect connections, and short-circuits and check the Input Type.

If no abnormality is found in the wiring and Input Type, turn the controller
power OFF then back ON again.

If the display remains the same, the Controller must be replaced. If the display
is restored, then the probable cause is electrical noise affecting the control
system. Check for electrical noise. Reroute sensor wires away from high
sources of electrical noise. Use shielded sensor wire and ground the shield at
one end.

Note: With an RTD type input a break in the A, B, or B1 line is regarded by

the controller as a disconnection.

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6-2 Troubleshooting & Error Indication

Operation at Error

• After an error occurs, the error is displayed and the alarm output
functions as if the Upper-Limit has been exceeded.

• If you configure the Input Error Output parameter in the Advanced

Setting function group to ON, the Alarm 1 output turns ON whenever
an input error occurs.

• An error message is displayed when the PV, PV/SP, or PV/MV is

displayed.

• The control output turns OFF when the manual MV, MV at stop, or
MV at PV error is configured, the control output corresponds to the
configured value.

[[[[
]]]]
Display Range Exceeded

Meaning

This is not an error, but rather, it is displayed if the process value (sensor
input) exceeds the display range when the control range is larger than the
display range.

The display ranges are shown below (with decimal points omitted).

• When less than −1,999 [[[[

• When more than 9,999 ]]]]
Action

Control continues, allowing normal operation. The message is displayed when

the PV, PV/SP, or PV/MV is displayed.

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 Troubleshooting & Error Indication 6-3

Figure 6.1
Resistance Thermometer Input Resistance Thermometer Input
(Except for models with a setting range of −199.9 to 500.0 °C) (Except for models with a setting range of −199.9 to 500.0 °C)
Thermocouple Input Thermocouple Input
(Except for models with a setting range of −199.9 to 400.0 °C) (Except for models with a setting range of −199.9 to 400.0 °C)
Control range Control range

s.err display Numeric display s.err display s.err display [[[[ display Numeric display s.err display
Input indication range Input indication range

Analog Input Analog Input

When Display Range < Control Range When Display Range > Control Range
Control range Control range

s.err display [[[[ display Numeric display ]]]] display s.err display s.err display Numeric display s.err display
Input indication range

−1999 Display range 9999 −1999 Display range 9999

1 1
1 The display range is shown in numbers with decimal points omitted.

e333 AD Converter Error

Meaning

There is an error in internal circuits.

Action

First, turn the controller power OFF then back ON again. If the display
remains the same, the Controller must be repaired. If the display is restored,
then the probable cause is electrical noise affecting the control system. Check
for electrical noise.

Operation

• The control outputs and alarm outputs turn OFF.

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6-4 Troubleshooting & Error Indication

e111 Memory Error

Meaning

The controller’s internal memory operation is in error.

Action

First, turn the controller power OFF then back ON again. If the display
remains the same, the Controller must be repaired. If the display is restored,
then the probable cause is electrical noise affecting the control system. Check
for electrical noise. (Refer to Actions under the Input Error section on page 6-1.)

Operation at Error

Control Output and Alarm Output turn OFF. (Current output is approx.
0 mA).

ffff Current Value Exceeds

Meaning

This error is displayed when the Heater Current value (current from CT)
exceeds 55.0 A.

Action

Control continues, allowing normal operation. The error message is displayed

when the following items are displayed:

• Heater Current 1 value monitor

• Heater Current 2 value monitor
• Leakage Current 1 monitor
• Leakage Current 2 monitor

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 Troubleshooting & Error Indication 6-5

ct1 Heater Burnout Alarm (HBA)

ct2 Heater Short Alarm (HSA)
lcr1 Heater Overcurrent
lcr2

Meaning

When a Heater Burnout (HBA), a Heater Short Alarm (HSA) or Heater

Overcurrent occurs, the No. 1 display in the applicable function group flashes.

Action

When either HBA, HSA, or Heater Overcurrent is detected, the HA indicator

lights and the No. 1 display flashes for the applicable Heater Current 1 Value
Monitor, Heater Current 2 Value Monitor, Leakage Current 1 Monitor, or
Leakage Current 1 Monitor parameters in the Operation function group and
Adjustment function group. Control continues, allowing normal operation if
possible.

Troubleshooting Checking Problems

If the Temperature Controller is not operating normally, check the following

points before requesting repairs. If the problem persists, contact your Rockwell
Automation representative for details on returning the product.

Table 6.A
Timing Status Meaning Countermeasures Page
Turning ON the Temperature unit ST (Self-Tuning) is in This is not a product fault. The temperature 3-33
power for the first (°C/°F) is flashing. progress (default unit (°C/°F) flashes while ST (Self-Tuning) is
time setting: ON). being performed
Temperature error is Input Type mismatch Check the sensor type and reset the Input 3-12
large. Type correctly.
Input error
Thermometer is not Check the thermometer installation location 2-17
(S.Err display)
installed properly. and polarity and install correctly.
Communications are Non-recommended Make sure that the connected device is not Section 1 of
not possible. adapter is being used. faulty. Communications
User’s Manual

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6-6 Troubleshooting & Error Indication

Timing Status Meaning Countermeasures Page

During operation Overshooting ON/OFF control is Select PID control and execute either ST 3-30
Undershooting enabled (default: (self-tuning) or AT (Auto-Tuning).
Hunting ON/OFF control When using self-tuning, turn ON the power
selected). supply to the Temperature Controller and load
(heater, etc.) at the same time, or turn ON the
load power supply first. Accurate self-tuning and
optimum control will not be possible if the power
supply to the load is turned ON after turning ON
the power supply to the Temperature Controller.
Control cycle is longer Shorten the control cycle. A shorter control cycle 3-17
compared with the improves control performance, but a cycle of 20
speed of rise and fall in ms minimum is recommended in consideration of
temperature the service life of the relays.
Unsuitable PID Set appropriate PID constants using either of the 3-30
constant following methods.

Execute AT (autotuning).

Set PID constants individually using manual

settings.
HS alarm operation Use breeder resistance if the problem is due to 3-46
fault leakage current. Also investigate the errors
detected by the HS alarm function.
Temperature is not Specified operation is Select either forward or reverse operation 3-17
rising unsuitable for required depending on the required control. Reverse
control (default: operation is used for heating operations.
Reverse operation)
Heater is burnt out or Check whether heater burnout or deterioration 3-46
deteriorated. have occurred. Also investigate the errors
detected by the Heater Burnout Alarm.
Insufficient heater Check whether the heater’s heating capacity is —
capacity sufficient.
Cooling system in Check whether a cooling system is operating. —
operation.
Peripheral devices have Set the heating prevention temperature setting to —
heat prevention device a value higher than the configured temperature of
operating. the Temperature Controller.
Output will not turn ON Set to STOP (default: Set the RUN/STOP mode to RUN. If STOP is lit on 5-16
RUN) the display, control is stopped.
Specified operation is Select either forward or reverse operation 3-17
unsuitable for required depending on the required control. Reverse
control (default: operation is used for heating operations.
Reverse operation)
A high hysteresis is Set a suitable value for the hysteresis. 3-16
configured for ON/OFF
operation (default:
1.0°C)
Temperature Controller Set to STOP (default: Set the RUN/STOP mode to RUN. If STOP is lit on 5-16
will not operate RUN) the display, control is stopped.

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 Troubleshooting & Error Indication 6-7

Timing Status Meaning Countermeasures Page

During operation Temperature error is Thermometer has burnt Check whether the thermometer has burnt out or —
(Continued) large out or short-circuited. short-circuited
Input error (S.err
Thermometer lead Wire the lead wires and power lines in separate —
display)
wires and power lines conduits, or wiring using a more direct path.
are in the same
conduit, causing noise
from the power lines
(generally, display
values will be
unstable).
Connection between Connect the thermocouple’s lead wires directly, —
the Temperature or connect a compensating conductor suitable for
Controller and the thermocouple.
thermocouple is using
copper wires.
Installation location of Check whether the location of the thermometer is —
thermometer is suitable.
unsuitable.
Input shift is not Set a suitable input shift. If input shift is not 4-1
configured correctly required, configured the input shift value to 3.
(default: 0°C)
Keys will not operate Setting change protect Turn OFF setting change protect. 4-33
is ON.
Cannot shift levels Operations limited due Set the operation/adjustment protect, initial 4-33
to protection. setting/communications protect, and setting
change protect values as required.
After long service Control is unstable Terminal screws may Retighten terminal screws to the torque 2-17
life be loose. recommended in Section 2 for your controller.
The internal The Temperature Controller’s internal electrolytic —
components have capacitor depends on the ambient temperature,
reached the end of and load rate. The structural life depends on the
their service life. ambient environment (shock, vibration). The life
expectancy of the output relays varies greatly
with the switching capacity and other switching
conditions. Always use the output relays within
their rated load and electrical life expectancy. If
an output relay is used beyond its life expectancy,
its contacts may become welded or burned.
Replace the Temperature Controller and all other
Temperature Controllers purchased in the same
time period.

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6-8 Troubleshooting & Error Indication

Symptom: Cannot Communicate or a Communications Error

Occurs

Table 6.B

Meaning Countermeasures
The communications wiring is not correct Correct the Wiring
The communications line has become disconnected Connect the communications line securely and tighten the screws.
The communications cable is broken. Replace the cable.
The communications cable is too long. The total cable length is 500 m maximum for RS-485 and 15 m maximum for
RS-232C communications.
The wrong communications cable has been used. Use a shielded, AWG24 to AWG14 (cross-sectional area of 0.205 to
2.081 mm2) twisted-pair cable for the 900-TC8 or 900-TC16. Use a shielded,
AWG24 to AWG18 (cross-sectional area of 0.205 to 0.823 mm2) twisted-pair
cable for the 900-TC32.
More than the specified number os communications When 1: N RS-485 communications are used, a maximum of 32 nodes
devices are connected to the same communications path (including the host node) can be connected.
for RS-485 communications
An end node has not been configured at each end of the Set or connect terminating resistance at each end of the line. If the 900-TC8,
communications line for RS-485 communications. 900-TC16, or 900-TC32 is the end node, use 120-Ω (1/2-W) terminating
resistance.
The combined terminating resistance with the host device must be
at least 54 Ω.
The specified power supply voltage is not Supply the specified power supply voltage.
being supplied to the Controller.
The specified power supply voltage is not Supply the specified power supply voltage.
being supplied to an Interface Converter
(such as the 900-CONVxx).
The same baud rate and communications Set the same values for the baud rate, protocol, data length, stop bits, and
method are not being used by all of the Controllers, host parity on all nodes.
devices, and other devices on the same communications
line.
The unit number specified in the command Use the correct unit number.
frame is different from the unit number configured by the
Controller.
The same unit number as the Controller is Set each unit number for a unique node number.
being used for another node on the same
communications line for RS-485 communications
There is a mistake in programming the host Use a line monitor to check the commands. Check operation using a sample
device. program.
The host device is detecting the absence of a response as Shorten the send data wait time in the Controller or increase the response
an error before it receives the wait time in the host device.
response from the Controller.
The host device is detecting the absence of a response as The Controller does not return responses for broadcast commands.
an error after broadcasting a
command.

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 Troubleshooting & Error Indication 6-9

Table 6.B

Meaning Countermeasures
The host device sent another command The response must always be read after sending a command (except for
before receiving a response from the Controller. broadcast commands).
The host device sent the next command too After receiving a response, wait at least 2 ms before sending the next
soon after receiving a response from the command.
Controller.
The communications line became unstable Initialize the reception buffer in the host device before sending the first
when Controller power was turned ON or command and after turning OFF the power to the Controller.
interrupted, and the host device read the
unstable status as data.
The communications data was corrupted Try using a slower baud rate.
from noise from the environment. Separate the communications cable from the source of noise.
Use a shielded, twisted-pair cable for the communications cable.
Use as short a communications cable as possible, and do not lay or loop
extra cable.
To prevent inductive noise, do not run the communications cable parallel
to a power line.
If noise countermeasures are difficult to implement, use an Optical Interface.

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6-10 Troubleshooting & Error Indication

Notes:

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 Appendix A

Specifications For the setting ranges for each sensor input, refer to page A-9.

Table A.A

Technical/Control
Supply Voltage 100…240V AC, 50/60 Hz 24V AC, 50/60 Hz/24V DC
Operating Voltage Range 85 to 110% of rated supply voltage
Power Consumption 900-TC16 7.5 VA 5 VA/3 W
900-TC8 10 VA 5.5 VA/4 W
900-TC32 5.5 VA 3 VA/2W
Recommended line fuse Type: T2A, 250V AC, time lag, low shut-off capacity 
Sensor Input  Temperature Input Type
Thermocouple: K, J, T, E, L, U, N, R, S, B, W, PL II
 Platinum resistance thermometer: Pt100, JPt100
Infrared temperature sensor: 10…70°C, 60…120°C, 115…165°C, 140…260°C
Sensor Input  Millivolt input: 0 to 50 mV
Supported by 900-TC8 & 900-TC16: Controllers with Analog Inputs
Current input: 4…20 mA, 0…20 mA (Input impedance: 150 Ω max.)
Voltage input: 1…5V, 0…5V, 0…10V (Input impedance: 1 MΩ max.)
Control Output Relay Output 900-TC16 Relay output:
SPST-NO, 250V AC, 3 A (resistive load), electrical durability: 100,000
 operations
Min. applicable load: 5V, 10 mA
Triac (AC) output
SPST-NO, 250V AC, 3 A (resistive load), electrical durability: 1,000,000
operations
Load power supply voltage: 75…250V AC 
Leakage current: 5 mA max. (250V AC, 60 Hz)
900-TC8 Relay output:
SPST-NO, 250V AC, 5 A (resistive load), electrical durability: 100,000
operations
Min. applicable load: 5V, 10 mA
Triac (AC) output:
SPST-NO, 250V AC, 3 A (resistive load), electrical durability: 1,000,000
operations
Load power supply voltage: 75…250V AC
Leakage current: 5 mA max. (250V AC, 60 Hz)
900-TC32 Relay output:
SPST-NO, 250V AC, 2 A (resistive load), electrical durability: 100,000
operations
Min. applicable load: 5V, 10 mA

 Available from Little Fuse or Bussmann (part no. GDC-2A).

 For the setting ranges for each sensor input, refer to page A-9.
 Always connect an AC load to a Triac output. The output will not turn OFF if a DC load is connected.

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A-2

Table A.A (Continued)

Technical/Control (Continued)
Control Output Voltage Output 900-TC16 Output voltage 12V DC ±15% (PNP), max. load current 21 mA, with
(Continued) over-current protection circuit
900-TC8 Series B: Output voltage 12V DC +15%/−20% (PNP), max. load
current 40 mA, with over-current protection circuit

Series B: Voltage Control Output 2: 12V DC +15%/−20% (PNP),

max. load current 21 mA, with over-current protection circuit
900-TC32 Output voltage 12V DC ±15% (PNP), max. load current 21 mA,
withover-current protection circuit
Analog Current 4…20 mA DC, 0…20 mA DC, Load: 600 Ω max., Resolution: approx. 10,000
Output (900-TC16 and 900-TC8)
Auxiliary Output 900-TC16 SPST-NO, 250V AC, 3 A (resistive load), electrical durability: 100,000 operations
Min. applicable load: 5V, 10 mA
900-TC8 SPST-NO, 250V AC, 3 A (resistive load), electrical durability: 100,000 operations
Min. applicable load: 5V, 10 mA
900-TC32 SPST-NO, 250V AC, 2 A (resistive load), electrical durability: 100,000 operations Min. applicable load:
5V, 10 mA
Event Input  Contact ON: 1 kΩ max.; OFF: 100 kΩ min.
Non- ON: residual voltage 1.5V max.; OFF: leakage current 0.1 mA max.
Supported by
contact
900-TC8 & 900-TC16
Control Method 2-PID or ON/OFF control
Configuration Method Digital setting using front panel keys, or 900 BuilderLite software
Hysteresis Controllers with 0.1…999.9°C or °F)
Thermocouple/Resistance (in units of 0.1°C or °F) 
Thermometer (Global)
Temperature
Controllers with Analog Inputs 0.01% to 99.99% FS (in units of 0.01% FS)
Proportional Band (P) Controllers with 0.1…999.9°C or °F)
Thermocouple/Resistance (in units of 0.1 EU) 
Thermometer (Global)
Temperature
Controllers with Analog Inputs 0.1% to 999.9% FS (in units of 0.1% FS)
0.01% to 99.99% FS (in units of 0.01% FS)
Integral Time (I) 0…3,999 s (in units of 1 s)
Derivative Time (D) 0…3,999 s (in units of 1 s)
When RT is ON: 0.0…999.9 (in units of 0.1 s)
Control Period 0.5, 1…99 s (in units of 1 s)
Manual Reset Value 0.0%…100.0% (in units of 0.1%)
Alarm Setting Range −1,999…9,999 (decimal point position depends on Input Type)
Sampling Period 250 ms

 Controller sources power to inputs: 5V DC @ 7 mA

 Set NONE as the unit for controllers with 0…50 Millivolt Inputs.

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 A-3

Table A.A (Continued)

Technical/Control (Continued)
Indication Accuracy Thermocouple :
(ambient temperature of 23°C) (±0.3% of indication value or ±1 °C, whichever is greater) ±1 digit max.
Platinum resistance thermometer:
(±0.2% of indication value or ± 0.8 °C, whichever is greater) ±1 digit max.
Analog input: ±0.2% FS ±1 digit max.
CT input: ±5% FS ±1 digit max.
Temperature Variation Thermocouple (R, S, B, W, PL II)
Influence  (±1% of PV or ±10°C, whichever is greater) ±1 digit max.
Other thermocouples:
(±1% of PV or ±4°C, whichever is greater) ±1 digit max.
Voltage Variation Influence ✟ *K thermocouple at −100°C max: ±10°C max.
Platinum resistance thermometer:
(±1% of PV or ±2 °C, whichever is greater) ±1 digit max.
Analog input: ±1% FS ±1 digit max. 
General/Environmental
Insulation Rresistance 20 MΩ min. (by 500V DC megger)
Dielectric Strength 2300V AC 50 or 60 Hz 1 min. (between terminals of different function)
Vibration Operating 10…55 Hz, 20 m/s2 (2 G) for 10 min. each in X, Y, and Z directions
Non- 10…55 Hz,20 m/s2 for 2 hrs. each in X, Y, and Z directions
operating
Shock Operating 100 m/s2 (10 G) max., 3 times in each X, Y, Z axes directions.
Non- 300 m/s2 (30 G) max., 3 times in each 3 axes, 6 directions.
operating
Protective Structure Front IP66
panel
Rear case IP20, terminals: IP00 (VDE 0106)
Memory Protection EEPROM (non-volatile memory) (number of writes: 100,000)
Approximate Weight Total Unit Adapter Terminal Cover
in grams
900-TC8 260 100 1.6 per cover
(includes carton)
900-TC16 150 10 10
900-TC32 90 10 —
Ambient Temperature –10…+55 °C (with no condensation or icing)

 The indication of K thermocouples in the −200…1,300°C range, T and N thermocouples at a temperature of

−100°C or less, and U and L thermocouples at any temperature is ±2°C ±1 digit maximum. The indication of B
thermocouples at a temperature of 400°C or less is not specified.
The indication of R and S thermocouples at a temperature of 200°C or less is ±3°C ±1 digit maximum.
 Ambient temperature: −10°C…23°C…55°C
Voltage range: −15…+10% of rated voltage

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A-4

Table A.A (Continued)

General/Environmental (Continued)
Ambient Humidity Relative humidity 25…85% (no condensation)
Storage Temperature –25…+65°C (with no condensation or icing)
Altitude 2,000 m or less
Installation Environment Installation Category II, Pollution Class 2 (IEC 61010-1 compliant)
Recommended Fuse T2A, 250V AC, time lag, low shut off capacity
EMC EMI EN 61326
Radiated Interference Electromagnetic EN 55011 Group 1, class A
Field Strength
Noise Terminal Voltage EN 55011 Group 1, class A
EMS EN 61326
ESD Immunity EN 61000-4-2
Electromagnetic Field Immunity EN 61000-4-3
Burst Noise Immunity EN 61000-4-4
Conducted Disturbance Immunity EN 61000-4-6
Surge Immunity EN 61000-4-5
Power Frequency Magnetic Field EN 61000-4-8
Immunity
Voltage Dip/Interrupting Immunity EN 61000-4-11
Standards & Certifications UL61010-1, CSA22.2 No. 1010.1; ULus
IP66. Conforms to EN61326, EN61010-1

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 A-5

Heater Burnout Alarm (HBA), Heater Short Alarm (HSA), and

Heater Overcurrent Alarm
)

Table A.B

Max. Heater Current 50 Amps AC

Input Current Readout ±5% FS ±1 digit max.
Accuracy
HBA Setting Range 0.1…49.9 Amps (0.1 Amp units)
0.0 Amps: Heater Burnout Alarm output turns OFF.
50.0 Amps: Heater Burnout Alarm output turns ON.
Min. detection ON time: 100 ms 
HSA Setting Range 0.1…49.9 Amps (0.1 Amp units)
0.0 Amps: HS alarm output turns ON.
50.0 Amps: HS alarm output turns OFF.
Min. detection OFF time: 100 ms 
Heater Overcurrent 0.1…49.9 Amps (0.1 Amp units)
Alarm Setting Range 0.0 Amps: Heater overcurrent Alarm turns ON.
50.0 Amps: Heater overcurrent Alarm turns OFF.
Min. detection OFF time: 100 ms

 When the Control Output 1 ON time is less than 100 ms, heater fault detection and heater current
measurement are not performed.
 When the Control Output 1 OFF time is less than 100 ms, HS alarm and leakage current measurement are not
performed.

900-CPOEM1 USB-Serial Conversion Cable

Specifications

Table A.C

Item Specifications
Applicable OS Windows 2000/XP/Vista/to be compatible with Windows 7
Applicable Software 900 BuilderLite
Applicable Models 900-TC8, 900-TC16, & 900-TC32 Controllers (refer to Tables
1.B and 1.D)
USB Interface Rating Conforms to USB Specification 1.1
DTE Speed 38,400 bps
Connector Specifications Computer end: USB (type A plug)
Temperature Controller end: Serial
Power Supply Bus power (5V DC supplied from USB host controller)
Current Consumption 70 mA
Ambient Operating 0…55°C (with no condensation or icing)
Temperature

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A-6

Table A.C

Item Specifications
Ambient Operating 10%…80%
Humidity
Storage Temperature −20…60°C (with no condensation or icing)
Storage Humidity 10%…80%
Altitude 2,000 m max.
Weight Approx. 100 g

Compatible Operating Environment

A personal computer that includes the following specifications is required.

• USB port
• Windows 2000/XP/Vista and to be compatible with Windows 7

Appearance and Nomenclature

Figure A.1 — Appearance

(2,100 mm)
250 mm LED (SD) 1,765 mm

USB connector (type A plug) LED (RD) Serial connector

Table A.D — LED Indicator Display

Indicator Color Status Meaning

SD Yellow Lit Sending data from USB-Serial Conversion
Cable
Not lit Not sending data from USB-Serial
Conversion Cable
RD Yellow Lit Sending data from USB-Serial Conversion
Cable
Not lit Not sending data from USB-Serial
Conversion Cable

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 A-7

Current Transformer (CT) Specifications

Table A.E

Item Specifications
Model 900-CT1 900-CT2
Max. Continuous Current 50 A 120 A 
Dielectric Strength 1000V AC (1 minute)
Vibration 50 Hz 98 m/S2
Approximate Weight 11.5 g 50 g

 The maximum continuous CT detection/display current of the Bulletin 900 controller is 50 A.

Approximate External Dimensions

Dimensions are in millimeters. Dimensions are not intended to be used for

manufacturing purposes.

Note: To convert millimeters to inches, multiply by 0.0394.

Figure A.2 — Cat. No. 900-CT1

21 2.8
15
7.5
8
5.
∅
25

10.5
3

40
5
3.8
∅
2-
10

30

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A-8

Figure A.3 — Cat. No. 900-CT2

30 ∅ 2.36

9
12
∅
40

4
h
pt
de
3
M
2-
15
30

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 A-9

Sensor Input Setting

and Indication Ranges
Table A.F — List of Global Temperature (GT) Input Types

Set
Input Type Specifications Value Input Setting Range Input Indication Range
Resistance Pt100 0 −200…850 (°C)/−300…1,500 (°F) -220…870 (°C)/-340…1540 (°F)
Thermometer
1 −199.9…500.0 (°C)/−199.9…900.0 (°F) -199.9…520 (°C)/-199.9…940 (°F)
2 0.0…100.0 (°C)/0.0…210.0 (°F) -20.0…120 (°C)/-40…250 (°F)
JPt100 3 −199.9…500.0 (°C)/−199.9…900.0 (°F) -199.9…520 (°C)/-199.9…940 (°F)
4 0.0…100.0 (°C)/0.0…210.0 (°F) -20.0…120 (°C)/-40…250 (°F)
Thermocouple K 5 −200…1,300 (°C)/−300…2,300 (°F) -220…1320 (°C)/-340…2340 (°F)
6 −20.0…500.0 (°C)/0.0…900.0 (°F) -40…520 (°C)/-40…940 (°F)
−100…850 (°C)/−100…1,500 (°F)
Thermocouple and Resistance Thermometer Multi-inputs

J 7 -120…870 (°C)/-140…1540 (°F)

8 −20.0…400.0 (°C)/0.0…750.0 (°F) -40…420 (°C)/-40…790 (°F)
T 9 −200…400 (°C)/−300…700 (°F) -220…420 (°C)/-340…740 (°F)
10 −199.9…400.0 (°C)/−199.9…700.0 (°F) -199.9…420 (°C)/-199.9…740 (°F)
E 11 0…600 (°C)/0…1,100 (°F) -220…620 (°C)/-340…1140 (°F)
Controller Type with

L 12 −100…850 (°C)/−100…1,500 (°F) -120…870 (°C)/-140…1540 (°F)

U 13 −200…400 (°C)/−300…700 (°F) -220…420 (°C)/-340…740 (°F)
14 −199.9…400.0 (°C)/−199.9…700.0 (°F) -199.9...420 (°C)/-199.9…740 (°F)
N 15 −200…1,300 (°C)/−300…2,300 (°F) -220…1320 (°C)/-340…2340 (°F)
R 16 0…1,700 (°C)/0…3,000 (°F) -20…1720 (°C)/-40…3040 (°F)
S 17 0…1,700 (°C)/0…3,000 (°F) -20…1720 (°C)/-40…3040 (°F)
B 18 100…1,800 (°C)/300…3,200 (°F) 0…1820 (°C)/0…3240 (°F)
Infrared 10…70°C 19 0…90 (°C)/0…190 (°F) -20…130 (°C)/-40…270 (°F)
(non-contact)
60…120°C 20 0…120 (°C)/0…240 (°F) -20…160 (°C)/-40…320 (°F)
temperature
sensor 115…165°C 21 0…165 (°C)/0…320 (°F) -20…205 (°C)/-40…400 (°F)
140…260°C 22 0…260 (°C)/0…500 (°F) -20…300 (°C)/-40…580 (°F)
Millivolt input 0…50 mV 23 Either of the following ranges, by scaling: 5%... 105% of setting range. The
−1,999…9,999 display shows - 1999 to 9999
−199.9…999.9 (numeric range with decimal point
omitted).
Thermocouple W 24 0…2300 (°C)/0…3200 (°F) -20…2320 (°C)/-40…3240 (°F)
PL-II 25 0…1300 (°C)/0…2300 (°F) -20…1320 (°C)/-40…2340 (°F)
Current Input 4...20 mA 0 Any of the following ranges, by scaling: -5%...105% of setting range. The
Controllers with
Analog Inputs

display shows -1999...9999 (numeric

0...20 mA 1
-1,999...9,999 range with decimal point omitted).
Voltage Input 1...5 V 2 -199.9...999.9
-19.99...99.99
0...5 V 3 -1.999...9.999
0...10 V 4

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• The default is 5 (°C/°F) for Controllers with Thermocouple/Resistance

Thermometer Universal Inputs and 0 for Controllers with Analog
Inputs.
• The applicable standards for each of the above input ranges are as
follows:
• K, J, T, E, N, R, S, B: JIS C1602-1995, IEC 584-1
• L: Fe-CuNi, DIN 43710-1985
• U: Cu-CuNi, DIN 43710-1985
• W: W5Re/W26Re, ASTM E988-1990
• JPt100: JIS C 1604-1989, JIS C 1606-1989
• Pt100: JIS C 1604-1997, IEC 751
• PLII: According to Platinel II Electromotive Force Table by
Engelhard Corp.

Control Range

• Resistance thermometer and thermocouple input Temperature lower

limit -20 °C to temperature upper limit +20 °C, or temperature lower
limit -40 °C to temperature upper limit +40 °C
• Infrared input: same as input indication range
• Analog input: -5% to +105% of scaling range

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 Appendix B

Parameter Operations List Function Groups

Global Temperature input:Controllers with Thermocouple/Resistance

Thermometer (RTD) and Millivolt (0…50) Inputs

Analog input:Controllers with Analog (e.g., 4…20 mA, 1…5V DC, etc.) Inputs

Table B.A — Operation Function Group

Set
Parameters Characters Setting (Monitor) Value Display Default Unit Value
Process Value Temperature: According to indication EU
range for each sensor. Analog:
Scaling lower limit
-5% FS to Scaling upper limit+5% FS
Set Point SP Lower-Limit to SP Upper-Limit 0 EU
Auto/Manual Switch a-m
Multi-SP Set Point Setting m-sp 0…3 0 None
Set Point During SP Ramp sp-m SP Lower-Limit to SP Upper-Limit EU
Heater Current 1 Value Monitor ct1 0.0…55.0 A
Heater Current 2 Value Monitor ct2 0.0…55.0 A
Leakage Current 1 Monitor lcr1 0.0…55.0 A
Leakage Current 2 Monitor lcr2 0.0…55.0 A
Program Start prst RSET, STRT rset RSET None
strt
Soak Time Remain sktr 0…9999 min or h
RUN/STOP r-s RUN/STOP run RUN None
stop
Alarm Value 1 al-1 −1999…9999 0 EU
Alarm Value Upper-Limit 1 al1h −1999…9999 0 EU
Alarm Value Lower-Limit 1 al1l −1999…9999 0 EU
Alarm Value 2 al-2 −1999…9999 0 EU
Alarm Value Upper-Limit 2 al2h −1999…9999 0 EU
Alarm Value Lower-Limit 2 al2l −1999…9999 0 EU
Alarm Value 3 al-3 −1999…9999 0 EU
Alarm Value Upper-Limit 3 al3h −1999…9999 0 EU
Alarm Value Lower-Limit 3 al3l −1999…9999 0 EU
MV Monitor (heating) o −5.0…105.5 (standard) %
0.0…105.0 (heating/cooling)
MV Monitor (cooling) c-o 0.0…105.0 %

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Table B.B — Adjustment Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Adjustment Level Display l.adj
AT Execute/Cancel at OFF, AT Cancel AT-2: 100% off OFF None
AT Execute AT-1: 40% AT at-2
Execute at-1
Communications Writing cmwt OFF, ON off on OFF None
Heater Current 1 Value Monitor ct1 0.0…55.0 A
Heater Overcurrent Detection 1 oc1 0.0…50.0 50.0 A
Heater Current 2 Value Monitor ct2 0.0…55.0 A
Heater Overcurrent Detection 2 oc2 0.0…50.0 50.0 A
Leakage Current 1 Monitor lcr1 0.0…55.0 A
HS Alarm 1 hs1 0.0…50.0 50.0 A
Leakage Current 2 Monitor lcr2 0.0…55.0 A
HS Alarm 2 hs2 0.0…50.0 50.0 A
Heater Burnout Detection 1 hb1 0.0…50.0 0.0 A
Heater Burnout Detection 2 hb2 0.0…50.0 0.0 A
SP 0 sp-0 SP Lower-Limit to SP 0 EU
Upper-Limit
SP 1 sp-1 SP Lower-Limit to SP 0 EU
Upper-Limit
SP 2 sp-2 SP Lower-Limit to SP 0 EU
Upper-Limit
SP 3 sp-3 SP Lower-Limit to SP 0 EU
Upper-Limit
Temperature Input Shift ins −199.9…999.9 0.0 °C or °F
Upper-Limit Temperature Input insh −199.9…999.9 0.0 °C or °F
Shift Value
Lower-Limit Temperature Input insl −199.9…999.9 0.0 °C or °F
Shift Value
Proportional Band p Universal input: 8.0 °C or °F ➊
0.1…999.9
Analog input: 0.1…999.9 10.0 %FS
Integral Time i 0…3,999 233 Second
Derivative Time d RT OFF: 0…3,999 40 Second
RT ON: 0.0…999.9 40.0 Second
Cooling Coefficient c-sc 0.01…99.99 1.00 None

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Table B.B — Adjustment Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set

Value
Dead Band c-db Universal input: −199.9…999.9 0.0 °C or °F ➊
Analog input: −19.99…99.99 0.00 %FS
Manual Reset Value of-r 0.0…100.0 50.0 %
Hysteresis (heating) hys Universal input: 0.1…999.9 1.0 °C or °F ➊
Analog input: 0.01…99.99 0.10 %FS
Hysteresis (cooling) chys Universal input: 0.1…999.9 1.0 °C or °F ➊
Analog input: 0.01…99.99 0.10 %FS
Soak Time soak 1…9,999 1 min or h
Wait Band wt-b Universal input: OFF, 0.1…999.9 off OFF °C or °F ➊
0.1 to
999.9
Analog input: OFF, 0.01…99.99 off OFF %FS
0.01 to
99.99
MV at Stop mv-s −5.0…105.0 (standard) 0.0 %
−105.0…105.0 (heating/cooling)
MV at PV Error mv-e −5.0…105.0 (standard) 0.0 %
−105.0…105.0 (heating/cooling)
SP Ramp Set Value sprt OFF or 1…9,999 off OFF EU/s,
1 to 9999 EU/min
MV Upper-Limit ol-h MV Lower-Limit +0.1 /105.0 (standard) 105.0 %
0.0…105.0 (heating/cooling)
MV Lower-Limit ol-l −5.0 to MV Upper-Limit −0.1 (standard) −5.0 (standard) %
−105.0…0.0 (heating/cooling) −105.0 (heating/
cooling)
MV Change Rate orl 0.0...100.0 (0.0: MV Change Rate Limit 0.0 %/s
Limit Disabled)
Extraction of Square sqrp 0.0...100.0 0.0 %
Root Low-cut Point

➊ Set NONE as the unit for controllers with 0…50 Millivolt Inputs.

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Table B.C — Initial Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Input Type in-t Global 0:Pt100 5 None
Temperature 1:Pt100
(GT) Input 2:Pt100
3:JPt100
4:JPt100
5: K
6: K
7: J
8: J
9: T
10: T
11: E
12: L
13: U
14: U
15: N
16: R
17: S
18: B
19:10…70 °C
20:60…120 °C
21:115…165 °C
22:140...260 °C
23:0…50 mV
24: W
25: PLII
Analog Input 0: 4…20 mA 0 None
1: 0…20 mA
2: 1… V
3: 0… V
4: 0…10V
Scaling Upper-Limit in-h Scaling Lower-Limit +1…9,999 100 None
Scaling Lower-Limit in-l −1,999 to scaling Upper-Limit −1 0 None
Decimal Point dp Universal input: 0…1 0 None
Analog input: 0…3 0 None
Temperature Unit d-u °C, °F c f °C None
SP Upper-Limit sl-h SP Lower-Limit + 1 / input range 1300 EU
Lower-Limit (temperature)
SP Lower-Limit + 1 / scaling 100
Upper-Limit (analog)

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Table B.C — Initial Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
SP Lower-Limit sl-l Input range Lower-Limit to SP −200 EU
Upper-Limit − 1 (temperature)
Scaling Lower-Limit to SP Upper-Limit 0
− 1 (analog)
PID ON/OFF intl ON/OFF 2-PID onof ON/OFF None
pid
Standard or s-hc Standard or heating/cooling send Standard None
Heating/Cooling h-c
ST st OFF, ON off on ON None
Program Pattern ptrn OFF, STOP, CONT off OFF None
stop
cont
Control Period cp 0.5 or 1…99 0.5 20 Second
(Heating) 1 to 99
Control Period (Cooling) c-cp 0.5 or 1…99 0.5 20 Second
1 to 99
Direct/Reverse orev Reverse operation, direct operation or-r Reverse None
Operation or-d operation

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Table B.C — Initial Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Alarm 1 Type alt1 0:Alarm function OFF 2 None

1:Upper- and Lower-Limit alarm

2:Upper-limit alarm

3:Lower-limit alarm

4:Upper- and Lower-Limit range alarm

5:Upper- and Lower-Limit alarm with

standby sequence

6:Upper-limit alarm with standby

sequence

7:Lower-limit alarm with standby

sequence

8:Absolute-value Upper-Limit alarm

9:Absolute-value Lower-Limit alarm

10:Absolute-value Upper-Limit alarm

with standby sequence

11:Absolute-value Lower-Limit alarm

with standby sequence

12:LBA (Loop Burnout Alarm)

13: PV change rate alarm

Alarm 1 Hysteresis alh1 Universal input: 0.1…999.9 0.2 °C or °F ➋
Analog input: 0.01…99.99 0.02 %FS

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Table B.C — Initial Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Alarm 2 Type alt2 Same settings as the alarm 1 type. 2 None

NOTE: The 12: LBA (Loop Burnout

Alarm) setting cannot be used.
Alarm 2 Hysteresis alh2 Universal input: 0.1…999.9 0.2 °C or °F ➊
Analog input: 0.01…99.99 0.02 %FS
Alarm 3 Type alt3 Same settings as the alarm 2 type 2 None
Alarm 3 Hysteresis alh3 Universal input: 0.1…999.9 0.2 °C or °F ➊
Analog input: 0.01…99.99 0.02 %FS
Transfer output type tr-t OFF:OFF off OFF None
SP:Set point sp
SP-M:Ramp set point sp-m
PV:Process value pv
MV:Manipulated variable (heating) mv
C-MV:Manipulated variable (cooling) c-mv
Transfer Output tr-h ➋ ➋ ➋
Upper-Limit
Transfer Output tr-l ➋ ➋ ➋
Lower-Limit
Linear Current Output o1-t 4-20: 4…20 mA 4-20 4-20 None
0-20: 0…20 mA 0-20
Number of Multi-SP ev-m 0…2 1 None
Uses
Event Input ev-1 NONE: None none NONE None
Assignment 1 STOP: RUN/STOP stop
MANU: Auto/manual switch manu
PRST: Program start ➌ prst
DRS: Invert Direct/Reverse Operation drs
AT-2: 100% AT Execute/Cancel at-2
AT-1: 40% AT Execute/Cancel at-1
WTPT: Setting Change Enable/Disable wtpt
LAT: Alarm Latch Cancel lat
Event Input ev-2 NONE: None none STOP None
Assignment 2 STOP: RUN/STOP stop
MANU: Auto/manual switch manu
PRST: Program start ➌ prst
DRS: Invert Direct/Reverse Operation drs
AT-2: 100% AT Execute/Cancel at-2
AT-1: 40% AT Execute/Cancel at-1
WTPT: Setting Change Enable/Disable wtpt
LAT: Alarm Latch Cancel lat

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Table B.C — Initial Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Extraction of Square sqr OFF, ON off OFF None
Root Enable on
Move to Advanced amov −1999…9,999 0 None
Setting function group
➊Set “None” as the unit for analog inputs
➋Initial Setting function group
➌PRST (Program Start) can be configured even when the Program Pattern parameter is configured to OFF, but the function will be disabled.

Table B.D

Default (Transfer Output

Transfer Output Type Setting (Monitor) Range Upper/Lower-Limits) ➍ Unit
Set Point SP Lower-Limit to SP Upper-Limit SP Upper-Limit/Lower-Limit EU
Set Point During SP Ramp SP Lower-Limit to SP Upper-Limit SP Upper-Limit/Lower-Limit EU
PV Temperature: Sensor setting range Lower-Limit Input setting range upper/Lower-Limit EU
to sensor setting range Upper-Limit
Analog: Scaling Lower-Limit to scaling Scaling upper/Lower-Limit EU
Upper-Limit
MV Monitor (Heating) Standard: −5.0…105.0 100.0/0.0 %
Heating/cooling: 0.0…105.0
MV Monitor (Cooling) 0.0…105.0 100.0/0.0 %

➍ Initialized when the transfer output type is changed.

Initialized if the Input Type, temperature unit, scaling upper/Lower-Limit, or SP upper/Lower-Limit is changed
when the transfer output type is SP, ramp SP, or PV.
(When initialized by the initializing settings, it is initialized to 100.0/0.0.)

Table B.E — Manual Control Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Manual MV −5.0…105.0 (standard)➎ 0.0 %
−105.0…105.0 (heating/cooling)

➎ When the Manual MV Limit Enable parameter is configured to ON, the setting range will be the MV lower limit
to the MV upper limit

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Monitor Setting Item Function Group

The contents displayed vary depending on the Monitor/Setting Value 1 to 5
(Advanced Setting function group).

Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Parameter Initialization init OFF, FACT off OFF None
fact
Multi-SP Use mspu OFF, ON off on OFF None
SP Ramp Time Unit spru S: EU/second s m M None
M: EU/minute
Standby Sequence rest Condition A, condition B a b Condition A None
Reset
HB ON/OFF hbu OFF, ON off on ON None
Auxiliary Output 1 al1n N-O: Open in alarm n-o N-O None
Open in Alarm N-C: Close in alarm n-c
Auxiliary Output 2 al2n N-O: Open in alarm n-o N-O None
Open in Alarm N-C: Close in alarm n-c
Auxiliary Output 3 al3n N-O: Open in alarm n-o N-O None
Open in Alarm N-C: Close in alarm n-c
Heater Burnout Latch hbl OFF, ON off on OFF None
Heater Burnout hbh 0.1…50.0 0.1 A
Hysteresis
ST Stable Range st-b 0.1…999.9 15.0 °C or °F
α alfa 0.00…1.00 0.65 None
AT Calculated Gain at-g 0.1...10.0 0.8 None
AT Hysteresis at-h Universal input: 0.1...999.9 0.8 °C or °F ➊
Analog input: 0.01...999.9 0.20 %FS
Limit Cycle MV lcma 5.0...50.0 20.0 %
Amplitude
Input Digital Filter inf 0.0…999.9 0.0 Second
Additional PV Display pvad OFF, ON off on OFF None
MV Display o-dp OFF, ON off on OFF None
Automatic Display ret OFF or 1…99 off OFF Second
Return Time 1 to 99
Alarm 1 Latch a1lt OFF, ON off on OFF None
Alarm 2 Latch a2lt OFF, ON off on OFF None
Alarm 3 Latch a3lt OFF, ON off on OFF None
Move to Protect prlt 1…30 3 Second
function group Time
Input Error Output sero OFF, ON off on OFF None

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Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Cold Junction cjc OFF, ON off on ON None
Compensation Method
MB Command Logic rlrv OFF, ON off on OFF None
Switching
PV Color Change colr Orange, Red, Green org RED None

Red to Green: When ALM1 is lit red

grn
r-g

Green to Red: When ALM1 is lit g-r

Red to Green to Red r-g.r

Within PV stable band: Green
Outside stable band: Red

Green to Orange to Red g-o.r

Within PV stable band: Green
Outside stable band: Green, Red

Orange to Green to Red o-g.r

Within PV stable band: Green
Outside stable band: Green, Red
PV Stable Band pv-b Universal input: 0.1…999.9 5.0 °C or °F ➊
Analog input: 0.01…99.99 5.00 %FS
Alarm 1 ON Delay a1on 0…999 (0: ON Delay disabled) 0 Second
Alarm 2 ON Delay a2on 0…999 (0: ON Delay disabled) 0 Second
Alarm 3 ON Delay a3on 0…999 (0: ON Delay disabled) 0 Second
Alarm 1 OFF Delay a1of 0…999 (0: OFF Delay disabled) 0 Second
Alarm 2 OFF Delay a2of 0…999 (0: OFF Delay disabled) 0 Second
Alarm 3 OFF Delay a3of 0…999 (0: OFF Delay disabled) 0 Second
Input Shift Type istp INS1: Temperature input ins1 INS1 None
1-point shift

INS2: Temperature input ins2

2-point shift
MV at Stop and Error mvst OFF, ON off on OFF None
Addition
Auto/Manual Select amad OFF, ON off on OFF None
Addition
RT rt OFF, ON off on OFF None
HS Alarm Use hsu OFF, ON off on ON None
HS Alarm Latch hsl OFF, ON off on OFF None
HS Alarm Hysteresis hsh 0.1…50.0 0.1 A

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Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
LBA Detection Time lba 0…9999 0 Second
(0: LBA function disabled)
LBA Level lbal Universal input: 0.1…999.9 8.0 °C or °F ➊
Analog input: 0.01…99.99 10.00 %FS
LBA Band lbab Universal input: 0.0…999.9 3.0 °C or °F ➊
Analog input: 0.00…99.99 0.20 %FS
Control Output 1 out1 When Control Output 1 is a O None
Assignment voltage (SSR) output: ➋
NONE: No assignment none
O: Control output (heating) o
C-O: Control output (cooling) c-o
ALM1: Alarm 1 alm1
ALM2: Alarm 2 alm2
ALM3: Alarm 3 alm3
P.END: Program end output ➌ p.end
RALM: Control output ON/OFF ralm
count alarm ➍
When Control Output 1 is a linear
analog output: ➋
NONE: No assignment none
O: Control output (heating) o
C-O: Control output (cooling) c-o
Control Output 2 out2 NONE: No assignment none NONE None
Assignment O: Control output (heating) o
C-O: Control output (cooling) c-o
ALM1: Alarm 1 alm1
ALM2: Alarm 2 alm2
ALM3: Alarm 3 alm3
P.END: Program end output ➊ p.end
RALM: Control output ON/OFF ralm
count alarm ➍
Auxiliary Output 1 sub1 Same as Control Output 1 (except ALM1 None
Assignment fixed as a relay output)
Auxiliary Output 2 sub2 Same as Control Output 1 ALM2 None
Assignment
Auxiliary Output 3 sub3 Same as Control Output 1 ALM3 None
Assignment (900-TC8)
Character Select csel OFF, ON off on ON None
Soak Time Unit t-u M: Minutes; H: Hours m h M None
Alarm SP Selection alsp SP-M: Ramp set point sp-m SP-M None
SP: Set point sp
Manual MV Limit manl OFF, ON off on ON None

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Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
PV Rate of Change pvrp 1...999 4 Sampling
Calculation Period period
Automatic Cooling csca OFF, ON off on OFF None
Coefficient Adjustment
Heater Overcurrent Use 0cu OFF, ON off on ON None
Heater Overcurrent ocl OFF, ON off on OFF None
Latch
Heater Overcurrent och 0.1...50.0 0.1 A
Hysteresis
PF Setting pf OFF: OFF off A-M None
RUN: RUN run
STOP: STOP stop
R-S: RUN/STOP r-s
AT-2: 100% AT execute/cancel at-2
AT-1: 40% AT execute/cancel at-1
LAT: Alarm Latch Cancel lat
A-ML Auto/manual a-m
PFDP: Monitor/Setting Item pfdp
Monitor/Setting Item 1 pfd1 0: Disabled 1 None
1: PV/SP/Multi-SP
2: PV/SP/MV
3: PV/SP/Soak time remain
4: Proportional band (P)
5: Integral time (I)
6: Derivative time (D)
7: Alarm value 1
8: Alarm value upper limit 1
9: Alarm value lower limit 1
10: Alarm value 2
11: Alarm value upper limit 2
12: Alarm value lower limit 2
13: Alarm value 3
14: Alarm value upper limit 3
15: Alarm value lower limit 3
Monitor/Setting Item 2 pfd2 0...15, same as Monitor Setting 0 None
Item 1
Monitor/Setting Item 3 pfd3 0...15, same as Monitor Setting 0 None
Item 1
Monitor/Setting Item 4 pfd4 0...15, same as Monitor Setting 0 None
Item 1
Monitor/Setting Item 5 pfd5 0...15, same as Monitor Setting 0 None
Item 1

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Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
PV/Display Screen spdp 0: PV/SP 4 None
Selection 1: PV/SP/Multi-SP, PV/SP/MV
2: PV/SP/MV, PV/SP/Multi-SP
3: PV/SP/Multi-SP
4: PV/SP/MV
5: PV/SP/Multi-SP, PV/SP/
Soak Time Remain
6: PV/SP/MV, PV/SP/Soak
Time Remain
7: PV/SP/Soak Time Remain
MV Display Selection odsl O: MV (Heating) o 0 None
C-O: MV (Cooling) c-o
PV Decimal Point pvdp OFF, ON off on ON None
Display
PV Status Display pvst OFF: OFF off OFF None
Function manu
MANU: Manual
stop
STOP: Stop
alm1
ALM1: Alarm 1 alm2
ALM2: Alarm 2 alm3
ALM3: Alarm 3 alm
ALM: Alarm 1 to 3 OR status ha
HA: Heater alarm
SV Status Display svst OFF: OFF off OFF None
Function manu
MANU: Manual
stop
STOP: Stop
alm1
ALM1: Alarm 1 alm2
ALM2: Alarm 2 alm3
ALM3: Alarm 3 alm
ALM: Alarm 1 to 3 OR status ha
HA: Heater alarm
Display Refresh Period d.ref OFF, 0.25, 0.5, 1.0 .25 Second
Control Output 1 ra1m 0....9999 0 100 times
ON/OFF Count Monitor
Control Output 2 ra2m 0....9999 0 100 times
ON/OFF Count Monitor
Control Output 1 ON/ ra1 0....9999 0 100 times
OFF Count Alarm Set
Value

Publication 900-UM007D-EN-E - January 2011

B-14

Table B.F — Advanced Setting Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set Value
Control Output 2 ON/ ra2 0....9999 0 100 times
OFF Count Alarm Set
Value
ON/OFF Counter Reset rac 0: Disable the counter reset o None
function.
1: Reset the control output 1
ON/OFF counter.
2: Reset the control output 2
ON/OFF counter.
Move to Calibration cmov −1999…9,999 0 None
function group

➊ Set “None” as the unit for analog inputs (23: 0 to 50 mV).

➋ The setting range depends on whether control output 1 is a current output or voltage output (for driving SSR).
➌ P.END (program end output) can be configured even when the program pattern is configured to OFF, but the
function will be disabled.
➍ Turns ON when either the control output 1 or 2 ON/OFF count alarm is ON.
Table B.G — Protect Function Group

Parameters Characters Setting (Monitor) Value Display Default Unit Set value
Move to Protect function pmov −1999…9,999 0 None
group
Operation/Adjustment oapt 0…3 0 None
Protect
Initial icpt 0…2 1 None
Setting/Communications
Protect
Setting Change Protect wtpt OFF, ON off on OFF None
PF Key Protect pfpt OFF, ON off on OFF None
Parameter Mask Enable pmsk OFF, ON off on ON None
Password to Move to prlp −1999…9,999 0 None
Protect function group

Table B.H Communications Function Group

Parameters Characters Setting (monitor) value Display Default Unit Set value
Protocol Setting psel 900-TC, Modbus cwf 900-TC None
mod
Communications Unit u-no 0…99 1 None
No.
Communications Baud bps 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, or 1.2 2.4 9.6 kbps
Rate 57.6 4.8 9.6
19.2 38.4
57.6
Communications Data len 7, 8 7 Bit
Length

Publication 900-UM007D-EN-E - January 2011

 B-15

Table B.H Communications Function Group

Parameters Characters Setting (monitor) value Display Default Unit Set value
Communications Stop sbit 1, 2 2 Bit
Bits
Communications Parity prty None, Even, Odd none Even None
even
odd
Send Data Wait Time sdwt 0…99 20 ms

Publication 900-UM007D-EN-E - January 2011

B-16

Setup Function Group This diagram shows all of the function groups. To move to the advanced
setting function group and calibration function group, you must enter
Diagrams passwords. Some parameters are not displayed depending on the protect
function group configuration and the conditions of use.

Figure B.1 — All Function Groups

Power ON
Start in Manual Mode

Start in Automatic Mode

Press the O Key or the

4 Protect the
PF Key for at least 1 second.
Operation Adjustment O + M Keys
Function Group Function Group Protect the for at least
O + M Keys
1 second.
Press the
a-m O Key for less than 1 second.
for at least c
25
3 seconds.
2 (Display will 100
1 ➊ PF Key flash after 1st
Press the O Key for at
Manual least 3 seconds while a-m Monitor/Setting 5 second.)
5
Mode is displayed. ( a-m will Function Group
3 flash after 1st second.)
2 3
Press the O Key for at
Press the PF Key
least 3 seconds.
Manual Control for at least 1 second.
Function Group 1
c
25 (Display will flash after 1st second.)
Press the 100 Protect
O Key for at Function Group
least 1 second.
Note: The time taken to move
Communications to the Protect level can
Initial Setting be adjusted by changing
Control Stops Setting
Function Group Press the Function Group
the “Move to protect level
time” setting.
O Key for less than 1 second.

Press the Input the password

O Key for at while amoV is displayed.
least 1 second. (Set Value - 169)

Advanced Setting
4
Function Group
Input Password Control in Progress

Control Stopped
Calibration Not Displayed for Some Models
2
Function Group
Function Group Change

➊ You can return to the operation level by executing a software reset. When the PF Setting parameter is
crossovered to A-M for a Controller with a PF Key (900-TC8)
➋ It is not possible to move to other levels from the calibration level by operating the keys on the front
panel. It can be done only by first turning OFF the power. When the PF Setting parameter is configured to PFDP
for a Controller with a PF Key (900-TC8).
➌ From the manual control level, key operations can be used to move to the operation level only.
➍ When the PF Setting parameter is confingured to A-M for a Controller with a PF Key (900-TC8 only).
➎ When the PF Setting parameter is configured to PFDP for a Controller with a PF Key (900-TC8 only) From the
manual control function group, key operations can be used to move to the operation function group only.

Publication 900-UM007D-EN-E - January 2011

 B-17

Parameter Flow This section describes the parameters configured in each level. Pressing the M
Key at the last parameter in each level returns to the top parameter in that
level.

PF Key 
Power ON
Starting in manual mode.
Starting in Press the O Key for at least 3 s. PF Key (See note 2.)
Manual Function Group automatic Other than the Auto/Manual Switch display
mode.
Press the PF Key Press the O Initial Setting Function Group
for at least 1 s. PID Key or the PF
C
25 Control Key for at least Press the Press the O Key less than 1 s.
(See note 1.) only 1 s. O Key for
 at least 1 s.
PV/MV in-t Input Type
Press the O Key less than 1 s. 5
Adjustment M
Function Group Operation Function Group Scaling Upper Limit
in-h
Press the O Key less than 1 s. 100
C Process Value
r-s RUN/STOP M
25 Added when Additional
PV display is ON. run in-l Scaling Lower Limit
Adjustment Function 0
Group Display M M

Set either of these parameters.

Displayed only
l.adj once when entering
C
ins Temperature Input Shift C
25 Process Value/ M
al-1 Alarm Value 1
C

Set Point Decimal Point

Adjustment
Function Group
0.0 0 0 dp
1-point shift 0 For input type of analog
M M M M
at
C Upper Limit
insh Temperature Set either Auto/Manual Switch M
AT Execute/Cancel of these a-m PID control only.
C
al1h Alarm Value
Temperature Unit
off 0.0 Input Shift Value parameters. Added when auto/man-
Upper Limit 1
0 d-u °C, °F
Press the ual select addition is ON. c
M M 2-point shift
O Key M M
For input type of
temperature
cmwt Communications
C
insl Lower Limit for at M
Writing Temperature
least 3 s. m-sp Multi-SP
Set Point Setting
C
al1l Alarm Value
SP Upper Limit
sl-h
C
Lower Limit 1
off 0.0 Input Shift Value 0 0
M 1300
M M M

Set either of these parameters.

ct1 Heater Current 1 C
p Proportional Band M Limit the set point
sp-m Set Point During
C
Value Monitor SP Ramp
C
al-2 Alarm Value 2 SP Lower Limit
0.0 8.0 0 0
C
sl-l
M M -200
M M
hb1 Heater Burnout i Integral Time M
Detection 1 ct1 Heater Current 1 Value C
al2h Alarm Value
0.0 233
Monitor
0.0 0
Upper Limit 2 cntl PID ON/OFF
M PID settings onof
M M M
oc1 Heater Overcurrent
d Derivative Time Heater Current 2 Value Alarm Value M
Detection 1 ct2 Monitor
C
al2l Lower Limit 2 Standard or
50.0 40 0.0 0 s-hc Heating/Cooling
M M stnd
M M

Set either of these parameters.

ct2 Heater Current 2
c-sc Cooling Coefficient M
Value Monitor lcr1 Leakage Current 1 C
al-3 Alarm Value 3
0.0 1.00 Monitor
0.0 0 st ST (Self-tuning)
on For input type of
M M Heating/cooling
M M temperature, stand-
hb2 Heater Burnout C
c-db Dead Band M ard control, or PID
Detection 2 lcr2 Leakage
Monitor
Current 2 C
al3h Alarm Value
0.0 0.0 0.0
Upper Limit 3
0
ptrn Program Pattern

M off When assigning PID or

M M M control output to ON/OFF
of-r Manual Reset Value M
oc2 Heater Overcurrent
Detection 2 Clear the offset during prst Program Start C
al3l Alarm Value
Lower Limit 3
output
50.0 50.0 stabilization of P or PD
control. rset 0 cp Control Period (Heating)
M M M M 20
lcr1 Leakage Current 1
Monitor
C
hys Hysteresis (Heating) sktr Soak Time Remain o MV Monitor (Heating) M
Set the ON/OFF
output cycle.
0.0
0.0 1.0 0 0.0 c-cp Control Period (Cooling)
M M Hysteresis settings M M 20
chys Hysteresis (Cooling)
C
hs1 HS Alarm 1
c-o MV Monitor (Cooling) M
50.0 1.0 0.0 orev Direct/Reverse Operation
M M M or-r
lcr2 Leakage Current 2
Monitor
soak Soak Time M
1 Press the O and M Keys for
0.0 Press the O Key Alarm 1 Type
at least 3 s. Press the O and M Keys for at least 1 s. less than 1 s.
alt1
M M 2
HS Alarm 2 C
wt-b Wait Band Communications
hs2 Protect Function Group M
50.0 off Setting Function Group Alarm 1
alh1
C
The time taken to move to the protect function Displayed only for models with communications.
M M can be adjusted by changing the "Move to Changes are effective after cycling power or after 0.2
Hysteresis
protect function group time" setting.
C
sp-0 SP 0 mv-s MV at Stop a software reset.
M
0.0 Move to Protect Function Group:
0 pmov
M
Displayed only when a password
0 is set. Restricts moving to protect psel Protocol Setting:
Switches between
M MV at PV Error function group. cwf 900-TC and
C
sp-1 SP 1 mv-e M Modbus.
0.0 Operation/Adjustment Protect:
M
0
M
SP used by
multi-SP M oapt Restricts displaying and modi-
fying menus in operation, ad-
u-no Communications Unit No.
0 justment, and manual control 1
C
sp-2 SP 2
C
sprt SP Ramp Set Value function groups.
0 off M Initial Setting/ M
Communications
M M icpt Communications Protect: bps Baud Rate
This restricts movement 900-TC only
MV Upper Limit 1 to the initial setting, communications, 9.6
C
sp-3 SP 3 ol-h
105.0 M
and advanced setting function groups.
M
0
M M wtpt Setting Change Protect:
Protects changes to setups by
len Communications
Data Length
MV Lower Limit off operating the front panel keys. 7
ol-l
-5.0 M M
M pfpt PF Key Protect
Restricts PF key operation
sbit Communications
Stop Bits
2
orl MV Change Rate Limit off (900-TC8 and 900-TC16 only)
0.0 M M
M pmsk Parameter Mask Enable:
Displayed only when a parame-
prty Communications Parity
on ter mask is set. even
Extraction of Square Root
sqrp Low-cut Point M M
0.0 Password to Move to Protect Send Data Wait Time
prlp Function Group: Password setting sdwt
M 0 20
M M

➊ When the PF Setting parameter is configured to A-M for a Controller with a PF Key (900-TC8 and 900TC-16).
➋ When the PF Setting parameter is configured to PFDP for a Controller with a PF Key (900-TC8 and 900-TC16).

Publication 900-UM007D-EN-E - January 2011

B-18

Monitor/Setting Item Level (900-TC8 and 900-TC16 only)

25
C
Monitor/Setting PF Monitor/Setting PF Monitor/Setting PF Monitor/Setting PF Monitor/Setting
Item Display 1 Item Display 2 Item Display 3 Item Display 4 Item Display 5
0

Note: The monitor/setting items to be displayed is set in the Monitor/Setting Item 1 to 5 parameters (advanced setting function group).

Press the O Key for at least 1 s.

Advanced Setting Function Group

Alarm 2 Type PF Setting

alt2 init Parameter Initialization a1lt Alarm 1 Latch hsu HS Alarm Use pf (900-TC8 and
2 off off on a-m 900-TC16 only)
M M M M M
C
alh2 Alarm 2
a2lt Alarm 2 Latch hsl HS Alarm Latch pfd1 Monitor/Setting Item 1
Hysteresis
0.2
mspu Multi-SP Uses
off off 1 (900-TC8
off
M M M M and 900-TC16 only)
M
alt3 Alarm 3 Type SP Ramp Time Unit a3lt Alarm 3 Latch hsh HS Alarm Hysteresis pfd2 Monitor/Setting Item 2
2 spru
m off 0.1 0
M M
Alarm 3 M M M
C
alh3 pfd3 Monitor/Setting Item 3
0.2
Hysteresis Standby Sequence
rest Reset prlt Move to Protect
Function Group Time lba LBA Detection Time
a 3 0 0
tr-t Transfer Output Type M M M M
off Linear output sb1n Auxiliary Output 1 sero Input Error Output
C
lbal LBA Level pfd4 Monitor/Setting Item 4
M n-o Open in Alarm off 8.0 0
tr-h Transfer Output
M M M
Upper Limit M
100.0 Cold Junction
cjc Compensation
C
lbab LBA Band pfd5 Monitor/Setting Item 5
sb2n Auxiliary Output 2
M n-o Open in Alarm on Method 3.0 0
tr-l Transfer Output
Lower Limit M M M M
0.0 MB Command "PV/SP" Display
sb3n Auxiliary Output 3 rlrv Logic Switching out1 Control Output 1
Assignment spdp Screen Selection
M n-o
Open in Alarm off o 4
o1-t Linear Current Output M M M M
4-20 Linear output
hbu HB ON/OFF colr PV Change Color out2 Control Output 2
Assignment odsl MV Display Selection
M red none o
on
ev-m Number of Multi-SP Uses
Two SPs: 1
1 Four SPs: 2 M M M M
pv-b PV Stable Band pvdp PV Decimal Point
C

M hbl Heater Burnout Latch sub1 Auxiliary Output 1

Assignment Display
off 5.0 alm1 on
ev-1 Event Input
M M M
none
Assignment 1 M Auxiliary Output 2 PV Status Display
M hbh Heater Burnout
Hysteresis a1on Alarm 1 ON Delay sub2 Assignment pvst Function
0.1 0 alm2 off
ev-2 Event Input
Assignment 2
stop M M M M
Auxiliary Output 3 SV Status Display
M
C
st-b ST Stable Range a2on Alarm 2 ON Delay sub3 Assignment svst Function
15.0 0 alm3 (900-TC8 and off
sqr Extraction
Root Enable
of Square
900-TC16 only)
off M M M M
alfa α d.ref Display Refresh
M Move to Advanced Setting a3on Alarm 3 ON Delay csel Character Select Period
amov Function Group 0.65 0 on 0.25
Displayed when initial set-
0 ting/communications pro- M M M M
tect is set to 0.
M at-g AT Calculated Gain a1of Alarm 1 OFF Delay t-u Soak Time Unit ra1m Control Output 1
ON/OFF Count
Move by setting password (−169). 0.8 0 m 0 Monitor

M M M M
Control Output 2
C
at-h AT Hysteresis a2of Alarm 2 OFF Delay alsp Alarm SP Selection ra2m ON/OFF Count
0.8 0 sp-m 0 Monitor

M M M
M Control Output 1
lcma Limit Cycle MV
a3of Alarm 3 OFF Delay manl Manual MV ra1 ON/OFF Count
Limit Enable
Amplitude
0 0 Alarm Set Value
20.0 off
M M M M
istp Input Shift Type ra2 Control Output 2
inf Input Digital Filter pvrp PV Rate of Change ON/OFF Count
0 Alarm Set Value
ins1 Calculation Period
0.0 4
M M M
M
pvad Additional PV Display mvse MV at Stop and Error
Addition csca
Automatic Cooling rac ON/OFF
Reset
Counter

Coefficient Adjustment 0
off off off
M M M M
o-dp MV Display amad Auto/Manual
Addition
Select
ocu Heater Overcurrent cmov Move to Calibration
Function Group
Use 0
off off on
M M M
M
ret Automatic Display rt RT ocl Heater Overcurrent
Return Time Latch
off off off
M M M
Heater Overcurrent
och Hysteresis
0.1
M

Publication 900-UM007D-EN-E - January 2011

 Appendix C

Calibration

Parameter Structure The Bulletin 900 Controller is correctly calibrated before it is shipped from the
factory, and normally need not be calibrated by the user. If, however, it must
be calibrated by the user, use the parameters for calibrating temperature input
and analog input.

Note: Rockwell Automation cannot ensure the results of calibration by the

user. Also, factory calibration data is overwritten with the user’s settings
and the factory default calibration settings cannot be returned after user
calibration.

• To execute user calibration, enter the password 1201 at the Move to

Calibration function group parameter in the Advanced Setting function
group. The mode will be changed to the calibration mode, and adj will
be displayed.
• The Move to Calibration function group parameter may not be
displayed when the user is doing the calibration for the first time. If this
happens, configured the Initial/Communications Protect parameter in
the Protect function group to 0 before moving to the Advanced Setting
function group.
• The calibration mode is ended by turning the controller power OFF.
• The parameter calibrations in the calibration mode are structured as
shown in Figure C.1.

C-1 Publication 900-UM007D-EN-E - January 2011

C-2 Calibration

Figure C.1 — Controllers with Thermocouple/Resistance Thermometer Universal

Inputs
Advanced Setting
Function Group

adj
30 Moves automatically according to input type.

Platinum Resistance Thermocouple or Infrared

Analog Input
Thermometer Temperature Sensor

0: Pt100 1: Pt100 5: K 6: K 19: K140F/60C 23:0 to

2: Pt100 7: J 8: J 20: K240F/120C 50 mV
3: JPt100 11: E 9, 10: T 21: K280F/140C
4: JPt100 12: L 13, 14: U 22: K440F/220C
15: N 16: R 24: W
17: S 25: PL II
18: B

p390 p280 t 54 t 24 c 54
e20c e26b b9a5 e220 b9as

p200 p140 t -6 t -6 t -6
9387 93d7 2988 0200 2988

p10 p10 c700 c700

4543 4543 br13 ba13

c400 c400
296e 29be

bias bias
35b8 35b8

str
no

Publication 900-UM007D-EN-E -January 2011

 Calibration C-3

Controllers with Analog Inputs (900-TC8 & 900-TC16)

Figure C.2
Advanced Setting
Function Group

adj
30 Moves automatically according to input type.

Current Input Voltage Input

0: 4 to 20 mA 2: 1 to 5 V 4: 0 to 10 V
1: 0 to 20 mA 3: 0 to 5 V

a 20 1v 5 2v10
c8e7 c7c3 b104

a 1 1v 1 2v 1
4677 sac0 4ad9

str
no

When calibration has been performed after purchase, the user calibration
information shown in the following illustration will be displayed when moving
to the calibration level.

Figure C.3

.adj
30
A Dot is Displayed

Registering Calibration The new calibration data for each item is temporarily registered. It can be
officially registered as calibration data only when all items have been calibrated
Data to new values. Therefore, be sure to temporarily register all items when you
perform the calibration. When the data is registered, it is also recorded that
user calibration has been performed.

Publication 900-UM007D-EN-E - January 2011

C-4 Calibration

Prepare separate measuring devices and equipment for calibration. For details
on how to handle measuring devices and equipment, refer to the respective
instruction manuals.

User Calibration Calibrating Input

The 900-TC8, 900-TC16, and 900-TC32 are correctly calibrated before they
are shipped from the factory, and normally need not be calibrated by the user.

If, however, they must be calibrated by the user, use the parameters for
calibrating temperature input and analog input. Rockwell Automation,
however, cannot ensure the results of calibration by the user. Also, the factory
calibration data is overwritten with the latest user calibration results. The
default calibration settings CANNOT be restored after user calibration.
Perform user calibration with care.

When the user calibrates the Bulletin 900 Controller, the Input Type currently
selected in parameters is calibrated.

The following 26 Input Types can be calibrated:

• Thermocouple: 16 types
• Non-contact temperature sensor: 4 types
• Analog input: 1 type
• Platinum resistance thermometer: 5 types

Controllers with Analog Inputs (900-TC8 and 900-TC16):

• Current input: 2 types

• Voltage input: 3 types

Registering Calibration Data

The new calibration data for each item is temporarily registered. It can be
officially registered as calibration data only when all items have been calibrated
to new values. Therefore, be sure to temporarily register all items when you
calibrate the Bulletin 900 Controller.

When calibration data is registered, it is registered regardless of whether or not

the Bulletin 900 Controller has been calibrated by the user.

Prepare separate measuring devices and equipment for calibration. For details
on how to handle measuring devices and equipment, see the respective sensor
manufacturer’s instruction manuals.

Publication 900-UM007D-EN-E -January 2011

 Calibration C-5

Calibrating Thermocouples Calibrate according to the type of thermocouple, thermocouple 1 group (Input
Types 5, 7, 11, 12, 15), and thermocouple 2 group (Input Types 6, 8, 9, 10, 13,
14, 16, 17, 18, 19, 20, 21, 22, 24, 25).

When calibrating, do not cover the bottom of the controller. Also, do not
touch the input terminals (pin numbers 4 and 5 on the 900-TC16, 19 and 20
on the 900-TC8, and 11 and 12 on the 900-TC32) or the compensating
conductor on the controller.

Preparations

Figure C.4 — Set the Cold Junction Compensator

900-TC8
900-TC8
1
Input Power Supply STV
2
Cold Junction
19 Compensator
20 0 °C/32 °F

Compensating Conductor

900-TC16
900-TC16
9
Input Power Supply STV
10
Cold Junction
4 Compensator
5 0 °C/32 °F

Compensating Conductor

900-TC32
900-TC32
1
Input Power Supply STV
2
Cold Junction
11 Compensator
12
0 °C/32 °F

Compensating Conductor

Publication 900-UM007D-EN-E - January 2011

C-6 Calibration

• Set the cold junction compensator designed for compensation of

internal thermocouples to 0°C. However, make sure that internal
thermocouples are disabled (tips are open).

• In the above figure, STV refers to a standard DC current/voltage

source.

• Use the compensating conductor designed for the selected

thermocouple. However, note that when thermocouples R, S, E, B, W
or PLII, or a non-contact temperature sensor is used, the cold junction
compensator and the compensating conductor can be substituted with
the cold junction compensator and the compensating conductor for
thermocouple Type K.

• Connecting the Cold Junction Compensator — Correct process values

cannot be obtained if you touch the contact ends of the compensating
conductor during calibration of a thermocouple. Accordingly,
short-circuit (enable) or open (disable) the tip of the thermocouple
inside the cold junction compensator as shown in the figure below to
create a contact or non-contact state for the cold junction compensator.

Figure C.5 — Connecting the Cold Junction Compensator

Enable Disable
Cold Junction Compensator Cold Junction Compensator
900-TC8 Short-Circuit 900-TC8
900-TC16 900-TC16
or 0 °C/ 32 °F 0 °C/ 32 °F Open
or
900-TC32 900-TC32

Compensating Conductor Compensating Conductor

This example describes how to calibrate the Bulletin 900 Controller when a
thermocouple input is currently selected.

1. Connect the power supply.

2. Connect a standard DC current/voltage source (STV), precision digital

multimeter (DMM), and contact junction compensator (e.g., zero
controller as in the figure below) to the thermocouple input terminals
(refer to Figure C.6 below).

Publication 900-UM007D-EN-E -January 2011

 Calibration C-7

Figure C.6 — Example, Zero Controller

900-TC8
900-TC16
900-TC32
STV

DMM
20/5/12 +
19/4/11 –
Leave Open
Zero
Controller
OUTPUT INPUT Compensating conductor of currently
selected thermocouple.
Use the K thermocouple compensating
conductor for:
• E, R, S, B, W, and PLII thermocouples and
• the non-contact temperature sensor

3. Turn the power ON.

4. Move to the Calibration function group. This starts the 30-minute timer.
This timer provides an approximate timer for aging. After 30 minutes,
the No. 2 display changes to 0. You can advance to the next step in this
procedure even if 0 is not displayed.

Figure C.7

adj
30

5. Press the M key to set the Bulletin 900 Controller to the state below.
The No. 2 display at this time displays the currently entered count value
entered in Hexadecimal. Set the STV as follows:
• Input Types 5, 7, 11, 12, 15: Set to 54 mV.
• Input Types 6, 8, 9, 10, 13, 14, 16, 17, 18, 19, 20, 21, 22, 24, 25: Set to
24 mV.

Figure C.8
Input Types Input Types
5, 7, 11, 12, 15: t-54 6, 8, 9, 10, 13,
14, 16, 17, 18,
t- 24
b9a5 19, 20, 21, 22: e220

Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration setup. If the count

Publication 900-UM007D-EN-E - January 2011

C-8 Calibration

value is outside the specified range, the Number 2 display will flash and
the count value will NOT be temporarily registered.

6. Press the M key to set the Bulletin 900 Controller to the state below. Set
STV to –6 mV. Allow the count value on the No. 2 display to fully
stabilize, then press the D key to temporarily register the calibration
setup. If the count value is outside the specified range, the Number 2
display will flash and the count value will NOT be temporarily
registered.

Figure C.9

t--6
2988

7. Press the M Key. The display changes as shown above.. Set the STV to
700 mV.
Allow the count value on the No. 2 display to fully stabilize, then press
the D Key to temporarily register the calibration settings. If this count
value is outside of the specified range, the No. 2 display will flash and
the count value will not be temporarily registered.

Figure C.10

c700
-
ba13
8. Press the M Key. The display changes as shown on the left.Set the STV
to 400 mV. Allow the count value on the No. 2 display to fully stabilize,
then press the D Key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will not be temporarily registered

Figure C.11

c400
4
29be

9. When the M Key is pressed, the status changes as shown to the left.

Figure C.12

bias
35b8

Publication 900-UM007D-EN-E -January 2011

 Calibration C-9

10. Change the wiring as follows

Figure C.13

Open in Non-connected State

STV

+
DMM
–
Short-Circuit
Zero
Controller
OUTPUT INPUT Compensating conductor of currently
selected thermocouple.
Use the K thermocouple compensating
conductor for:
• E, R, S, B, W, and PLII thermocouples and
• an infrared temperature sensor

Disconnect the STV to enable the thermocouple of the cold junction

compensator. When doing this, be sure to disconnect the wiring on the STV
side.

11. Allow the count value on the No. 2 display to fully stabilize, then press
the D Key to temporarily register the calibration settings.

Figure C.14

str
no

12. When the M Key is pressed, the status changes as shown to the left.
The data to be temporarily registered is not displayed if it is not
complete. Press the U Key. The No. 2 display changes to yes. Release
the key and wait two seconds or press the M Key. This stores the
temporarily registered calibration data to EEPROM. To cancel the
saving of temporarily registered calibration data to EEPROM, press the
M Key (while no is displayed in the No. 2 display) without pressing the
U Key.

13. The calibration mode is ended by turning the power OFF

14. Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration setup.

Publication 900-UM007D-EN-E - January 2011

C-10 Calibration

15. Press the M key. The No. 2 display changes to the state below. Note
that the data to be temporarily registered is not displayed if it is not
complete.

Figure C.15

str
no

16. Press the U key. The No. 2 display changes to yes. Release the key and
wait 2 seconds or press the M key. This stores the temporarily
registered calibration data to EEPROM. To cancel storage of
temporarily registered calibration data to memory, press the M key
without pressing the U key.

17. The calibration mode is ended by turning the power OFF.

Calibrating 0…50 mV This example describes how to calibrate when 0…50 mV input (Input Type
23) is currently selected on a Bulletin 900-TC8, 900TC16, or 900-TC32
Analog Input Controller supporting Global Temperature (GT) inputs.

Figure C.16
900-TC8
900-TC8
1
Input Power Supply
2

- 19 STV

+ 20 DMM

900-TC16 900-TC32

9 1
Input Power Supply Input Power Supply
10 2

STV 4 − STV 11 −

5 + 12 +
DMM DMM

1. Connect the power supply.

2. Connect an STV and DMM to the analog input terminals, as shown in

the figures above.

Publication 900-UM007D-EN-E -January 2011

 Calibration C-11

3. Turn the power ON.

4. Move to the Calibration function group. This starts the 30-minute aging
timer. This timer provides an approximate timer for aging. After 30
minutes, the No. 2 display changes to 0. You can advance to the next
step in this procedure even if 0 is not displayed.

Figure C.17

adj
30

5. Press the M key to set the Bulletin 900 to the state below. The No. 2
display at this time displays the currently entered count value entered in
Hexadecimal. Set the STV to 54 mV.

Figure C.18

t-54
b9a5

6. Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will not be temporarily registered.

7. Press the M key to set the Bulletin 900 to the state below. Set STV to
–6mV.

Figure C.19

t--6
2988

8. Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration setup. If this count
value is outside of the specified range, the No. 2 display will flash and
the count value will not be temporarily registered.

9. Press the M key. The No. 2 display changes to the state below. Note
that the data to be temporarily registered is not displayed when it is not
entirely prepared. Press the U key. The No. 2 display changes to yes.
Release the key and wait 2 seconds or press the M key. This stores the
temporarily registered calibration data to EEPROM. To cancel the
saving of temporarily registered calibration data to EEPROM, press the
M key (while no is displayed in the No. 2 display) without pressing the
U key.

Publication 900-UM007D-EN-E - January 2011

C-12 Calibration

Figure C.20

str
no

10. The calibration mode is ended by turning the controller power OFF.

Calibrating Platinum This example describes how to calibrate the Bulletin 900 Controller when it is
connected to a platinum resistance thermometer.
Resistance Thermometers
Figure C.21
900-TC8
1 900-TC8
Input Power Supply
2
A 18
B 19 6-dial
B 20

900-TC16 900-TC16
9
Input Power Supply
10 A 3
B' 4 6-dial
B 5

900-TC32 900-TC32
1
Input Power Supply
2 A 10
B' 11 6-dial
B 12

When calibrating a platinum resistance thermometer use wires of the same

thickness as those used to connect the Bulletin 900 Controller.

1. Connect the power supply.

2. Connect a precision resistance box (called 6-dial in this manual) to the

platinum resistance thermometer input terminals.

3. Turn the power ON.

4. Move to the Calibration function group. This starts the 30-minute aging
timer. This timer provides an approximate timer for aging. After
30 minutes, the No. 2 display changes to 0. You can advance to the next
step in this procedure even if 0 is not displayed.

Publication 900-UM007D-EN-E -January 2011

 Calibration C-13

Figure C.22

adj
30

5. Press the M key to display the count value for each Input Type. The
No. 2 display at this time displays the currently entered count value in
Hexadecimal. Set the 6-dial as follows:
• Input Type 0: 390 Ω
• Input Type 1, 2, 3 or 4: 280 Ω

Figure C.23
Input Type Input Type
0: p390 1, 2, 3, 4: p280
e20c e26b

6. Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration setup. If this count
value is outside of the specified range, the No. 2 display will flash and
the count value will not be temporarily registered.

7. Press the M Key to display the count value for each input type. The No.
2 display at this time shows the currently entered count value in
hexadecimal.Set the 6-dial as follows:
• Input type 0: 200 Ω
• Input type 1, 2, 3 or 4: 140 Ω

Figure C.24

p200 p140
93a7 e26b

8. Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration setup.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will not be temporarily registered.
When the M key is pressed, the status changes as shown in Figure
C.25. Set the 6-dial to 10 Ω.

9. Allow the count value on the No. 2 display to fully stabilize, then press
the D Key to temporarily register the calibration settings.If this count
value is outside of the specified range, the No. 2 display will flash and
the count value will not be temporarily registered.

Publication 900-UM007D-EN-E - January 2011

C-14 Calibration

10. When the M Key is pressed, the status changes as shown to the left.
The data to be temporarily registered is not displayed if it is not
complete. Press the U Key. The No. 2 display changes to yes. Release
the key and wait two seconds or press the M Key. This stores the
temporarily registered calibration data to EEPROM.To cancel the
saving of temporarily registered calibration data to EEPROM, press the
M Key (while no is displayed in the No. 2 display) without pressing the
U Key.

11. The calibration mode is quit by turning the power OFF.

Figure C.25

str
no

Calibrating Analog Input Calibrating an Analog Current Input (900-TC8 & 900-TC16)
(e.g., 4…20 mA Analog
Input) In this example, calibration is shown for a Controller with an Analog current
Input (Input Type 0 or 1).

1. Connect the power supply.

2. Connect an STV and DMM to the current input terminals, as shown in

the following diagram.

Figure C.26
900-TC8 900-TC16
1 9
Input Power Supply Input Power Supply
2 10

STV 19 − STV 4 −

DMM 20 + DMM 5 +

3. Turn the power ON.

4. Move to the calibration function group.

This starts the 30-minute aging timer. This timer provides an
approximate timer for aging. After 30 minutes have elapsed, the No. 2
display changes to 0. You can advance to the next step in this procedure
even if 0 is not displayed.

Publication 900-UM007D-EN-E -January 2011

 Calibration C-15

Figure C.27

adj
30

5. When the M key is pressed, the status changes as shown in Figure C.28.
The No. 2 display at this time shows the currently entered count value in
hexadecimal. Set the STV to 20 mA.
Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will NOT be temporarily registered.

Figure C.28

a-20
c8e7
6. When the M key is pressed, the status changes as shown in Figure C.29.
Set the STV to 1 mA.
Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will NOT be temporarily registered.

Figure C.29

a--1
4677
7. When the M key is pressed, the status changes as shown in Figure C.30.
The data to be temporarily registered is not displayed if it is not
complete.
Press the U key. The No. 2 display changes to yes. Release the key and
wait 2 seconds or press the M key. This stores the temporarily
registered calibration data to EEPROM.
To cancel the saving of temporarily registered calibration data to
EEPROM, press the M key (while no is displayed in the No. 2 display)
without pressing the U key.

Figure C.30

str
no

8. The calibration mode is ended by turning the controller power OFF.

Publication 900-UM007D-EN-E - January 2011

C-16 Calibration

Calibrating an Analog Voltage (e.g., 1…5V DC) Input (900-TC8 &

900-TC16)

In this example, calibration is shown for a Controller with an Analog Voltage

Input (Input Type 2, 3, or 4).

1. Connect the power supply.

2. Connect an STV and DMM to the voltage input terminals, as shown in

the following diagram.

Figure C.31

900-TC8 900-TC16

1 9
Input Power Supply Input Power Supply
2 10

STV 19 − STV 4 −

DMM 20 + DMM 5 +

3. Turn the power ON.

Figure C.32

adj
30

4. Move to the calibration function group.

This starts the 30-minute aging timer. This timer provides an
approximate timer for aging. After 30 minutes have elapsed, the No. 2
display changes to 0. You can advance to the next step in this procedure
even if 0 is not displayed.

5. When the M key is pressed, the status changes as shown in the figure
below.
The No. 2 display at this time shows the currently entered count value in
hexadecimal. Set the STV as follows:
• Input Type 2 or 3: 5V
• Input Type 4: 10V
Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will not be temporarily registered.

Publication 900-UM007D-EN-E -January 2011

 Calibration C-17

Figure C.33
Input Type Input Type 4:
2 or 3: 1v- 5 2v10
c7c3 b104

6. When the M key is pressed, the status changes as shown in the figure
below.
Set the STV to 1V.
Allow the count value on the No. 2 display to fully stabilize, then press
the D key to temporarily register the calibration settings.
If this count value is outside of the specified range, the No. 2 display will
flash and the count value will not be temporarily registered.

Figure C.34
Input Type Input Type
2 or 3:
1v- 1 4: 2v- 1
5ac0 4ad9

7. When the M key is pressed, the status changes as shown in the figure
below.
The data to be temporarily registered is not displayed if it is not
complete.
Press the U key. The No. 2 display changes to yes. Release the key and
wait 2 seconds or press the M key. This stores the temporarily
registered calibration data to EEPROM.
To cancel the saving of temporarily registered calibration data to
EEPROM, press the M key (while no is displayed in the No. 2 display)
without pressing the U key.

Figure C.35

str
no

8. The calibration mode is ended by turning the power OFF.

Publication 900-UM007D-EN-E - January 2011

C-18 Calibration

Checking Indication • After calibrating input, make sure to check indication accuracy to make
sure that the Bulletin 900 Controller has been correctly calibrated.
Accuracy
• Operate the Bulletin 900 Controller in the PV/SP monitor mode.

• Check the indication accuracy at the Upper- and Lower-Limits and

mid-point.

Checking Accuracy of a Thermocouple or Non-Contact

Temperature Sensor

• Preparation: The following figure shows the required device

connection. Make sure that the Bulletin 900 Controller and cold
junction compensator are connected by a compensating conductor for
the thermocouple that is to be used during actual operation. For the
non-contact temperature sensor, connect a K thermocouple, and
configured the Input Type to the K thermocouple.

Figure C.36
900-TC8
900-TC8
1
Input Power Supply
2 Cold Junction Compensator

- 19
STV
+ 20

Compensation Conductor
900-TC16
900-TC16
9
Input Power Supply
10 Cold Junction Compensator

- 4
STV
+ 5

Compensation Conductor
900-TC32
900-TC32
1
Input Power Supply
2 Cold Junction Compensator

- 11
STV
+ 12

Compensation Conductor

Publication 900-UM007D-EN-E -January 2011

 Calibration C-19

• Operation: Make sure that the cold junction compensator is at 0°C, and
configured STV output to the voltage equivalent to the starting power
of the value to be checked. The cold junction compensator and
compensation conductor are not required when an external cold
junction compensation method is used.

Checking Indication Accuracy of a Platinum Resistance

Thermometer

• Preparation: The following figure shows the required device

connection:

Figure C.37
900-TC8
1
900-TC8
Input Power Supply
2 A 18
B' 19 6-dial
B 20

900-TC16
9
900-TC16
Input Power Supply
10 A 3
B' 4 6-dial
B 5

900-TC32
1
900-TC32
Input Power Supply
2 A 10
B' 11 6-dial
B 12

• Operation: Set the 6-dial to the resistance equivalent to the check value.

Publication 900-UM007D-EN-E - January 2011

C-20 Calibration

Analog Input (900-TC & 900-TC16)

• Preparation: The following figures show the required device

connection:

Figure C.38 — Controller with a Thermocouple/Resistance Thermometer

Multi-input (Analog Input)
900-TC8
1
900-TC8
Input Power Supply
2
− 19
STV
+ 20

900-TC16 900-TC16
9
Input Power Supply
10
− 4
STV
+ 5

Figure C.39 — Current Input for a Controller with an Analog Input

900-TC8
1
900-TC8
Input Power Supply
2
– 19
STV
+ 20

900-TC16 900-TC16
9
Input Power Supply
10
+ 3
STV
− 4

Figure C.40 — Voltage Input for a Controller with an Analog Input

900-TC8 900-TC8
1
Input Power Supply
2
− 19
STV
+ 20

900-TC16 900-TC16
9
Input Power Supply
10
− 4
STV
+ 5

• Operation
Set the STV output to the voltage or current equivalent to the check
value.

Publication 900-UM007D-EN-E -January 2011

 Appendix D

Glossary

Adaptive Tuning: Used to continuously monitor and optimize PID constants

while the controller operates. Three tuning algorithms are used to recalculate
the PID constants within 500 ms after the process value stabilizes at set point:
step-response method, disturbance tuning, and hunting tuning.

Anti-Reset Wind-Up (ARW): A feature of PID controllers that prevents the

integral (auto-reset) circuit from operating when the temperature is outside the
proportional band.

Alpha (α): This represents the temperature coefficient of the change in

electrical resistance of a material. For each °C in temperature the electrical
resistance changes. It is the defining parameter for platinum resistance
temperature detectors (RTD sensors). The unit of measure is ohms/ohms/°C.

Analog: Data collected and represented by continuously variable quantities,

such as voltage measurement or temperature variation.

Auto-Tuning: This feature automatically calculates then resets the PID values
based on temperature control performance over a sampled period. In some of
the controllers, auto-tuning also optimizes the settings for fuzzy logic control
values.

CE: A marking on products that comply with European Union requirements

pertaining to safety and electromagnetic compatibility.

Celsius: A temperature scale in which water freezes at 0°C and boils at 100°C
at standard atmospheric pressure. The formula to convert Fahrenheit
temperatures to Celsius is as follows: °F = (1.8 x °C) +32.

Cold Junction Compensation: Electronic means of compensating for the

ambient temperature at the cold junction of a thermocouple so it maintains a
reference to 0°C.

D-1 Publication 900-UM007D-EN-E - January 2011

D-2 Glossary

Contact Output: Relay control outputs are often available in these contact
forms:

• Form A Contact (SPST-NO): Single-pole, single-throw relays use the

normally open and common contacts to switch power. The contacts
close when the relay coil is energized and open when power is removed
from the coil.

• Form B Contact (SPST-NC): Single-pole, single-throw relays use the

normally closed and common contacts. These contacts open when the
relay coil is energized and close when power is removed from the coil.

• Form C Contact (SPDT): Single-pole, double-throw relays use the

normally open, normally closed, and common contacts. The relay can
be wired as a Form A or Form B contact.

Control Action: The control output response relative to the difference

between the process variable and the set point. For reverse action (usually
heating), as the process decreases below the set point, the output increases. For
direct action (usually cooling), as the process increases above the set point, the
output increases.

Control Mode: The type of control action used by the controller can include
ON/OFF, time-proportioning, PD, and PID. Other combinations and
refinements are used.

CSA: Canadian Standards Association is an independent testing laboratory

that establishes commercial and industrial standards, as well as tests products
and certifies them.

C-UL: This symbol appearing in literature and marked on products indicates

Canadian recognition of Underwriters Laboratories, Inc. approval of particular
product classes. The C-UL approval may stand in place of Canadian Standards
Association certification. All references to C-UL are based on prior listing or
recognition from the original UL file.

Dead Band: The time period in a control system between a change in stimuli
and any measurable response in the controlled variable. In the deadband,
specific conditions can be placed on control output actions. Operators select
the dead band width. It is usually above the heating proportional band and
below the cooling proportional band.

Derivative: The rate of change in a process variable which forms the “D” in a
PID control algorithm. This control action anticipates the rate of change of
the process and compensates to minimize overshoot and undershoot.
Derivative control is an instantaneous change of the control output in the
same direction as the proportional error. This is caused by a change in the
process variable (PV) that decreases over the derivative time.

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 Glossary D-3

Deviation: A departure of a controlled variable from a command such as set

point.

Deviation Indication: A system of indication in which a departure of a

detected value from the set point is indicated.

DIN (Deutsches Institut für Normung): A German standards agency that

sets world-recognized engineering and industrial standards.

DIN 43760: The standard that defines the characteristics of a 100 Ω platinum
RTD having a resistance vs. temperature curve specified by a = 0.00385 Ω per
degree.

Drift: A gradual change over a long period of time that affects the reading or
value. Changes in ambient temperature, component aging, contamination,
humidity, and line voltage all contribute to drift.

Droop: Controllers using only proportional control can settle at a value below
the actual set point once the system stabilizes. This offset is corrected with the
addition of Integral control in the control algorithm.

Electromagnetic Compatibility: To conform with CE’s EMC requirements,

equipment or a system must operate without introducing significant
electromagnetic disturbances to the environment or be affected by
electromagnetic disturbances.

Electromagnetic Interference: There are many possible sources for

electromagnetic interference (EMI) in an industrial control setting. It can
originate as electrical or magnetic noise caused by switching AC power on
inside the sine wave. EMI interferes with the operation of controls and other
devices.

Electromechanical Relay: A power switching device that completes or

interrupts a circuit by physically moving electrical contacts into contact with
each other. These are used primarily for ON/OFF control operation.

Event: A programmable ON/OFF output signal. Events can control

peripheral equipment or processes, or act as an input for another control loop.
Event input boards are an option for most Rockwell controllers.

Fahrenheit: A temperature scale that has 32° at the freezing point and 212° at
the boiling point of water at sea level. To convert Fahrenheit to Celsius,
subtract 32 from °F and multiply the remainder by 0.556.

Full Indication: A system of indication in which a detected value is indicated

with a setting range.

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D-4 Glossary

Fuzzy Logic: A rule-based control algorithm that enables control devices to

make subjective judgments in a way similar to human decision-making. Within
a process controller, fuzzy logic uses some basic information about the system,
which is input by the user, to emulate the way an expert operator who was
manually controlling the system would react to a process up set.

Heat Sink: An object that conducts and dissipates heat away from an object in
contact with it. Solid-state relays usually use a finned aluminum heat sink to
dissipate heat.

Hot Junction and Cold Junction: If a thermocouple is generating a voltage,

this means that there is a temperature difference between the two ends of the
thermocouple. The hot end is the one that makes contact with the temperature
process being controlled. The cold end is at the sensor input terminals.

Hunting: Oscillation of the process temperature between the set point and
the process variable. Derivative control is used in the control algorithm to
reduce hunting.

Hysteresis (Dead Band): A temperature band between the ON and OFF of

an output in the ON/OFF control action. No heating or cooling takes place.
The band occurs between the ON and OFF points.

Infrared: The portion of the electromagnetic spectrum with wavelengths

ranging from one to 1000 microns. These wavelengths are ideal for radiant
heating and non-contact temperature sensing.

Input Digital Filter: A device used to sample the input slower than the scan
rate to allow the controller to monitor an input that changes very rapidly and
still have sufficient information from the process to control it.

Input Scaling: The ability to scale input readings (% of full scale) to the
engineering units of the process variable.

Input Type: The type of device used to provide a signal of temperature

change. These include thermocouples, RTDs, linear or process current, or
voltage inputs.

Integral Action (I): Control action that eliminates offset, or droop, between
set point and actual process temperature. This is the “I” in the PID control
algorithm.

Japanese Industrial Standards (JIS): A Japanese agency that establishes and

maintains standards for equipment and components. Its function is similar to
Germany’s Deutsches Institut für Normung.

Linearity: A measure of the deviation of an instrument’s response from a

straight line.

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 Glossary D-5

Loop Break Alarm: This alarm indicates a problem in the control loop, e.g., a
sensor has become disconnected or a problem has developed with the final
control element.

Manipulated Variable: The final output percentage (0…100%) that will be

sent to a control element. This percentage can be related to a valve position, a
4…20 mA signal, or the amount of ON time from a pulsed control output.

Manipulated Variable Limiting: A control option used when the process

cannot handle the full output of the heater or final control device. To limit the
manipulated variable, the user programs the controller so that it never sends a
100% output to the final control element.

Manual Mode: A selectable mode that has no automatic control aspects. The
user sets the output levels.

Multiple Set Points: Two or more set points independent from each other
which can be configured in the temperature controller.

National Electrical Manufacturers Association (NEMA): The United

States organization that establishes specifications and ratings for electrical
components and apparatus. Conformance by manufacturers is voluntary.
However, Underwriters Laboratories will test products to NEMA ratings for
operating performance and enclosure ratings.

National Institute of Standards and Technology (NIST): Formerly the

National Bureau of Standards, this United States agency is responsible for
establishing scientific and technical standards.

NEMA 4X: This enclosure rating specification certifies that a controller’s

front panel resists water washdown and is corrosion-resistant in indoor usage.

Normal Action: A control action which will increase the control output if the
process value is higher than the set point. This action is suitable for a cooling
system.

Offset: A controlled deviation (the difference in temperature between the set

point and the actual process temperature) remaining after a controlled system
reaches its steady state. The offset (droop) is created by the correlation
between the thermal capacity of the controlled system and the capacity of
heating equipment.

ON/OFF Control Action: A control action which turns the output fully on
until the set point is reached, and then turns off. Also called “two-position”
control action.

Overshoot: The number of degrees by which a process exceeds the set point
temperature.

Publication 900-UM007D-EN-E - January 2011

D-6 Glossary

Process Variable: The parameter that is controlled or measured, such as

temperature, relative humidity, flow, and pressure.

Proportional Band: The range of temperature in which a manipulated

variable is proportionate to any deviation from the set point.

Proportional Control Action (P): A control action in which the manipulated

variable is proportionate to any deviation from the set point.

Proportional Period: A cycle of ON and OFF operations of the output relay

in a time-division proportional control action.

Proportional Control Plus Derivative Function (PD): A

time-proportioning controller that has a derivative function. The derivative
function monitors the rate at which a system’s temperature is either increasing
or decreasing and adjusts the cycle time of the controller to minimize
overshoot or undershoot.

Proportioning Control with Integral and Derivative Functions (PID): A

time-proportioning controller that has integral and derivative functions. The
integral function automatically raises the stabilized system temperature to
match the set point temperature to eliminate the difference caused by the
time-proportioning function. The derivative function monitors the rate of rise
or fall of the system temperature and automatically adjusts the cycle time of
the controller to minimize overshoot and undershoot. Also called
“three-mode” control.

Range: The difference between the lower and Upper-Limits of a

measurement quantity.

Rate Action (D): The controller senses the rate of change of temperature and
provides an immediate change of output to minimize the eventual deviation.

Remote Set Point: A remote set point allows a controller to receive its set
point from a source other than itself.

Reset (Auto Reset) Action: There is a manual adjustment that can be applied
to the offset by changing the configured value dial or moving the offset screw
on the control panel. The auto-reset function automatically adjusts the
configured value to eliminate offset.

Resistance Temperature Detector (RTD): A coil of wire, usually platinum,

whose resistance increases linearly with a rise in temperature. RTDs generally
have a higher accuracy rating than thermocouples.

Reverse Action: A control action in which the output power will be inversely
proportional to the deviation. An increase in the process variable will cause a
decrease in the output power, making this action suitable for a heating system.

Publication 900-UM007D-EN-E - January 2011

 Glossary D-7

Serial Communications: A method of transmitting information between

devices by sending all bits serially over a communication channel. RS-232 is
used for point-to-point connections of a single device, usually over a short
distance. RS-485 communicates with multiple devices on a single, common
cable over longer distances.

Set Point: The value configured on the process or temperature controller to

control the system.

Soft Start: A method of applying power gradually over a period of seconds to

controlled devices such as heaters, pumps and motors. This lengthens the
service life of the load by limiting in-rush current to inductive loads.

Solid-State Relay (SSR): A switching device with no moving parts that

completes or interrupts a circuit electrically.

Thermal Response: The time required for the response curve of the
temperature sensor to rise to a specified percentage level (usually either 63% or
90%).

Thermocouple Sensor: A device that converts heat to electricity. Usually

made of two wires, each of a different metal or alloy. The wires are joined at
one end, known as the hot end. The hot end makes thermal contact with the
process to be controlled. The cold end terminals are connected to the sensor
input. Voltages are created at both the hot and cold ends. The controller
measures the cold end temperature to determine the hot end temperature.

Underwriters Laboratories (UL): This independent testing laboratory

establishes commercial and industrial standards, as well as tests and certifies
products in the US. They also offer testing to Canadian Standards Association
requirements with products bearing the cUL marking.

Undershoot: This is the amount by which the process variable falls below the
set point before it stabilizes.

Zero Cross Switching: Used in solid-state relays, this action provides output
switching only at or near the zero-voltage crossing point of the AC sine wave.
It reduces electromagnetic interference and high inrush currents during initial
turn-on.

Publication 900-UM007D-EN-E - January 2011

D-8 Glossary

Notes:

Publication 900-UM007D-EN-E - January 2011

 Index

Numerics Communications function. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

setting level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
2PID control parameter operation list . . . . . . . . . . . . . . . . . . . . . . . . . B-14
2PID control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16, 3-25 Control outputs - wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

A Controllers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
Controllers with Analog Input . . . . . . . . . . . . . . . . . . . . . . . C-14
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-i Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-i
Additional PV display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-78 Cooling coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15, 5-36
Adjustment level parameter operation list . . . . . . . . . . . B-2, B-3
Advanced function setting level . . . . . . . . . . . . . . . . . . . . . . 3-6 Current Transformer
parameter operation list . . . . . . . . . . . . . . . . . . . . . . B-9, B-11 calculating detection current. . . . . . . . . . . . . . . . . . . . . . 3-50
Alarms specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Alarm 1 type . . . . . . . . . . . . . . . 5-59, 5-61-62, 5-64-66, 5-68, 5-73 installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-48
Alarm 2 type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-59, 5-63, 5-73 Current Value Exceeds (error display) . . . . . . . . . . . . . . . . . 6-4
Alarm delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Alarm hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
D
Alarm outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42 Dead band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37
Alarm value 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16-18 Decimal point . . . . . . . . . . . . . . . . . . 5-33, 5-42, 5-49, 5-52, 5-54
alarm delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44 Derivative time . . . . . . . . . . . . . . . . . . 3-30, 3-39, 5-22, 5-25, 5-35
Dimensions, approximate . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Analog input Detection current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50
calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-14 Direct/reverse operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-58
Analog input (voltage input) . . . . . . . . . . . . . . . . . . . . . 4-10, 5-52 Display Range Exceeded (error display) . . . . . . . . . . . . . . . 6-2
AT (Autotuning) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Auto control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
E
Auto/manual Ehanced Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii
example operating procedure . . . . . . . . . . . . . . . . . . . . . 4-59 Error displays
select addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56 Current Value Exceeds . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Automatic return of display mode . . . . . . . . . . . . . . . . . . . . 5-79 Display Range Exceeded . . . . . . . . . . . . . . . . . . . . . . . . 6-2

B HB Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Heater Burnout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Bulletin 900-TC8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii HS Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Bulletin 900-TC16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii Input Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Bulletin 900-T32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-ii Memory Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

C Event Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Calibration
analog input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
F
platinum resistance thermometer . . . . . . . . . . . . . . . . . . C-12 Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
thermocouples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
current input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-14
G
voltage input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-16 General/Environmental Specifications . . . . . . . . . . . . . . . . . A-4
Checking indication accuracy . . . . . . . . . . . . . . . . . . . . . . . . C-18
 2

H switching between auto and manual . . . . . . . . . . . . . . . 4-23,

4-53
HB Error (error display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 manual control level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
HBA (heater burnout alarm). . . . . . . . . . . . . . . . . . . . . . . . . 3-46 moving to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54
detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27 parameter operation list . . . . . . . . . . . . . . . . . . . . . . . . . B-8
error display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 Manual reset value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-74 MB command logic switching . . . . . . . . . . . . . . . . . . . . . 5-82..89
settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55 Memory Error (error display). . . . . . . . . . . . . . . . . . . . . . . . 6-4
specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7, 2-10, 2-13
Heater current value monitor . . . . . . . . . . . . . . . . . . . . . . . . 5-26 MultiSP (set point 0 to 3) . . . . . . . . . . . . . . . . . . . . . . . 4-19, 5-10
HS alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46, A-5 MV at PV error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-76, 5-87
settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-59 MV at stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75, 5-87
error display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 MV lower limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-42
Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29 MV monitor (OUT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
(OUT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38 MV monitor (OUT2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
(OUT2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38 MV upper limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-42, 5-43, 5-44

I N
Initial setting level
parameter operation list . . . . . . . . . . . . . . . . . . . B-4, B-5, B-7
O
setup examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Initial/communications protection . . . . . . . . . . . . . . . . . . . . 5-49 ON/OFF cont·ol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Input digital filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-77 executing ON/OFF control. . . . . . . . . . . . . . . . . . . . . . . 3-25
Input error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41 Operation level . . . . . . . . . . . . . . . . . . . . . . . 3-15, 3-27, 5-23, 5-49
Input Error (error display) . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 parameter operation list . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Input shift values, how to calculate . . . . . . . . . . . . . . . . . . . 4-3 Option units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Input Types Output functions assignments. . . . . . . . . . . . . . . . . . . . . . . . 3-20
default values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-50 Output limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75
list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13, A-9
P
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Integral time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30 Parameter initialize. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71
Parameter operation list . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
L adjustment level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2, B-3
LBA (loop burnout alarm) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47 manual control level. . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 operation level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
detection time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49, 4-50 advanced function setting level . . . . . . . . . . . . . . . . B-9, B-11
level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49, 4-50 communications setting level. . . . . . . . . . . . . . . . . . . . . B-14
Lower limit temperature input shift value . . . . . . . . . . . . . . 5-35 initial setting level . . . . . . . . . . . . . . . . . . . . . . . . B-4, B-5, B-7
protect level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14
M Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
Manipulated variable display . . . . . . . . . . . . . . . . . . . . . . . . 5-78 PF Key - Using to move to the Manual Control Level. . . . . 4-59
Manual Control Level PID / ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55
definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 PID constants (AT, ST, manual setup) . . . . . . . . . . . . . . . . . 3-30
 3

Precautions, Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36

Program end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-69 Shifting input values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Program patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67 simple program function . . . . . . . . . . . . . . . . . . . . . . . 4-66, 4-73
Proportional band . . . . . . . . . . . . . . . . . . . . . 3-30, 5-22, 5-25, 5-35 controlling start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Protect level parameter operation list . . . . . . . . . . . . . . . . . . B-14 starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
PV display soak time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
color change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39 SP ramp alarm operations . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
stable band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41 SP ramp set value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41, 5-47
PV/M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-47 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1, A-7, B-1
PV/SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15, 5-8, 5-11, 5-79 USB-Serial Conversion Cable . . . . . . . . . . . . . . . . . . . . . A-5
ST (selftuning) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-56, 5-57, 5-75
R ST stable range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-75
RT (robust tuning) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36, 5-88 Standby sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-72
Run/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16 Standby sequence reset method . . . . . . . . . . . . . . . . . . . . . . 5-72
support software port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
S
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
T
Scaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-52 Temperature input shift . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7, 5-34
Scaling lower limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-49, 5-52 Transfer output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-62
Scaling upper limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-49, 5-52 scaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-63
Selecting PID control or ON/OFF control . . . . . . . . . . . . . . 3-16 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Sensor input setting ranges . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Set point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
U
Set point 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33 Upperlimit temperature input shift value . . . . . . . . . . . . . . . 5-35
Set point 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33 USB-Serial Conversion Cable Specifications. . . . . . . . . . . . A-5
Set point 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33 User calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Set point during SP ramp . . . . . . . . . . . . . . . . . . . . . . . 4-29, 5-10
Setting heating and cooling control . . . . . . . . . . . . . . . . . . . 4-15
V
Setting output specifications . . . . . . . . . . . . . . . . . . . . . . . . . 3-17 Voltage input calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-16
Setting scaling upper and lower limits (analog input) . . . . . 4-10
Setting the PID / ON/OFF parameter . . . . . . . . . . . . . . . . . . 3-27
W
Setting the set point upper limit . . . . . . . . . . . . . . . . . . . . . . 4-27 Wait band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
Setting the SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Setting the SP upper and lower limit values . . . . . . . . . . . . . 4-26
Setting the upper and lower limits . . . . . . . . . . . . . . . . . . . . 5-18
Setting up the option units . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Setup levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16
HBA (heater burnout alarm) . . . . . . . . . . . . . . . . . . . . . . . . . 3-55
HS alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-59
moving to advanced function setting level . . . . . . . . . . . 3-58
hysteresis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
LBA detection time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
Back Cover

Publication 900-UM007D-EN-E - January 20112

Supersedes Publication 900-UM007C-EN-D - October 2008 © 2011 Rockwell International Corporation. Printed in the U.S.A.