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(Catalog Number 1762-IT4) - Rockwell Automation

MicroLogix 1200. Thermocouple/mV. Input Module ( catalog Number 1762 -IT4). User Manual Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products 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. In no event will Allen-Bradley be responsible or liable for indirect or consequential damage resulting from the use or application of these products. Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example.

Publication 1762-UM002A-EN-P - July 2002 Preface 2 Related Documentation The table below provides a listing of publications that contain important information about MicroLogix 1200 systems.

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Transcription of (Catalog Number 1762-IT4) - Rockwell Automation

1 MicroLogix 1200. Thermocouple/mV. Input Module ( catalog Number 1762 -IT4). User Manual Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products 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. In no event will Allen-Bradley be responsible or liable for indirect or consequential damage resulting from the use or application of these products. Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example.

2 Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication. Allen-Bradley publication , Safety Guidelines for the Application, Installation and Maintenance of Solid-State Control (available from your local Allen-Bradley 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.

3 Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard: WARNING Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal ! injury or death, property damage, or economic loss. Identifies information about practices or ATTENTION. circumstances that can lead to personal injury or death, property damage, or economic loss. ! IMPORTANT Identifies information that is critical for successful application and understanding of the product. Table of Contents Preface Who Should Use This Manual.

4 P-1. How to Use This Manual .. P-1. Manual Contents .. P-1. Related Documentation .. P-2. Conventions Used in This Manual .. P-2. Rockwell Automation Support .. P-3. Local Product Support .. P-3. Technical Product Assistance .. P-3. Your Questions or Comments on the Manual .. P-3. Chapter 1. Overview General Description .. 1-1. Thermocouple/mV Inputs and Ranges .. 1-1. Data Formats .. 1-2. Filter Frequencies .. 1-2. Hardware Features.. 1-2. General Diagnostic Features .. 1-4. System Overview .. 1-4. System Operation .. 1-4. Module Operation .. 1-5. Module Field Calibration .. 1-6. Chapter 2. Installation and Wiring Compliance to European Union Directives .. 2-1. EMC Directive .. 2-1. Low Voltage Directive .. 2-2. Power Requirements .. 2-2.

5 General Considerations .. 2-2. Hazardous Location Considerations .. 2-3. Prevent Electrostatic Discharge .. 2-3. Remove Power .. 2-4. Selecting a Location .. 2-4. Mounting .. 2-5. Minimum Spacing .. 2-5. DIN Rail Mounting .. 2-5. Panel Mounting .. 2-6. System Assembly.. 2-7. Field Wiring Connections .. 2-7. i Publication 1762 -UM002A-EN-P - July 2002. Table of Contents ii Wiring .. 2-9. Terminal Block Layout .. 2-9. Labeling the Terminals .. 2-9. Wiring the Finger-Safe Terminal Block .. 2-10. Wire Size and Terminal Screw Torque .. 2-11. Terminal Door Label .. 2-11. Wiring the Module .. 2-11. Wiring Diagram .. 2-13. Cold Junction Compensation .. 2-13. Calibration .. 2-14. Chapter 3. Module Data, Status, and Channel Module Memory Map .. 3-1. Configuration Accessing Input Image File Data.

6 3-1. Input Data File .. 3-2. Input Data Values .. 3-2. General Status Bits (S0 to S4) .. 3-2. Open-Circuit Flag Bits (OC0 to OC4) .. 3-3. Over-Range Flag Bits (O0 to O4) .. 3-3. Under-Range Flag Bits (U0 to U4).. 3-3. Configuring Channels .. 3-4. Configuration Data File .. 3-4. Channel Configuration .. 3-4. Enabling or Disabling a Channel (Bit 15) .. 3-6. Selecting Data Formats (Bits 14 through 12) .. 3-6. Selecting Input Type (Bits 11 through 8).. 3-8. Selecting Temperature Units (Bit 7) .. 3-9. Determining Open-Circuit Response (Bits 6 and 5) .. 3-9. Selecting Input Filter Frequency (Bits 2 through 0) .. 3-10. Selecting Enable/Disable Cyclic Calibration (Word 4, Bit 0) .. 3-14. Determining Effective Resolution and Range .. 3-14. Determining Module Update Time.

7 3-33. Effects of Autocalibration on Module Update Time .. 3-34. Calculating Module Update Time .. 3-35. Impact of Autocalibration on Module Startup During Mode Change.. 3-37. Chapter 4. Diagnostics and Troubleshooting Safety Considerations .. 4-1. Indicator Lights .. 4-1. Stand Clear of Equipment.. 4-2. Program Alteration.. 4-2. Safety Circuits .. 4-2. Publication 1762 -UM002A-EN-P - July 2002. Table of Contents iii Module Operation vs. Channel Operation .. 4-2. Power-up Diagnostics .. 4-3. Channel Diagnostics .. 4-3. Invalid Channel Configuration Detection.. 4-3. Over- or Under-Range Detection .. 4-3. Open-Circuit Detection .. 4-4. Non-critical vs. Critical Module Errors .. 4-4. Module Error Definition Table .. 4-4. Module Error Field.. 4-4.

8 Extended Error Information Field .. 4-5. Error Codes .. 4-6. Contacting Rockwell Automation .. 4-7. Appendix A. Specifications General Specifications .. A-1. Input Specifications.. A-2. Repeatability at 25 C (77 F) .. A-3. Accuracy.. A-4. Accuracy Versus Thermocouple Temperature and Filter Frequency .. A-5. Appendix B. Two's Complement Binary Positive Decimal Values .. B-1. Numbers Negative Decimal Values .. B-2. Appendix C. Thermocouple Descriptions International Temperature Scale of 1990.. C-1. Type B Thermocouples .. C-1. Type E Thermocouples .. C-3. Type J Thermocouples .. C-5. Type K Thermocouples .. C-7. Type N Thermocouples.. C-9. Type R Thermocouples .. C-11. Type S Thermocouples .. C-12. Type T Thermocouples .. C-14. References .. C-17.

9 Appendix D. Using Thermocouple Junctions Using a Grounded Junction Thermocouple .. D-1. Using an Ungrounded (Isolated) Junction Thermocouple .. D-2. Using an Exposed Junction Thermocouple .. D-3. Publication 1762 -UM002A-EN-P - July 2002. Table of Contents iv Appendix E. Module Configuration Using Module Addressing .. E-1. MicroLogix 1200 and RSLogix 500 1762 -IT4 Configuration File .. E-2. Configuration Using RSLogix 500 Version or Higher .. E-2. Generic Extra Data Configuration .. E-6. Configuration Using RSLogix 500 Version or Lower .. E-7. Glossary Index Publication 1762 -UM002A-EN-P - July 2002. Preface Read this preface to familiarize yourself with the rest of the manual. This preface covers the following topics: who should use this manual how to use this manual related publications conventions used in this manual Rockwell Automation support Who Should Use This Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Manual Allen-Bradley MicroLogix 1200.

10 How to Use This Manual As much as possible, we organized this manual to explain, in a task-by-task manner, how to install, configure, program, operate and troubleshoot a control system using the 1762 -IT4. Manual Contents If you See An overview of the thermocouple/mV input module Chapter 1. Installation and wiring guidelines Chapter 2. Module addressing, configuration and status information Chapter 3. Information on module diagnostics and troubleshooting Chapter 4. Specifications for the input module Appendix A. Information on understanding two's complement binary numbers Appendix B. Thermocouple descriptions Appendix C. Information on using the different types of thermocouple junctions Appendix D. An example of configuration using RSLogix 500 Appendix E.


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