Allen-Bradley MicroLogix 1200 Manuale utente

MicroLogix™ 1200

RTD/Resistance

Input Module

(Catalog Number 1762-IR4)

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 Rockwell Automation 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. 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.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the

Application, Installation and Maintenance of Solid-State Control

(available from your local Rockwell Automation 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.

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:

Allen-Bradley, MicroLogix, RSLogix, and RSLinx are trademarks of Rockwell Automation.

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.

ATTENTION

Identifies information about practices or

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.

1Publication 1762-UM003A-EN-P - February 2003

Table of Contents

Preface

Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . 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

Your Questions or Comments on the Manual . . . . . . . . P-3

Chapter 1

Overview

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

RTD Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Resistance Device Compatibility . . . . . . . . . . . . . . . . . . 1-5

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

General Diagnostic Features . . . . . . . . . . . . . . . . . . . . . 1-6

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Module Field Calibration . . . . . . . . . . . . . . . . . . . . . . . 1-8

Chapter 2

Installation and Wiring

Compliance to European Union Directives . . . . . . . . . . . . . 2-1

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

System Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Field Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

System Wiring Guidelines. . . . . . . . . . . . . . . . . . . . . . . 2-8

RTD Wiring Considerations . . . . . . . . . . . . . . . . . . . . . 2-9

Wiring the Finger-Safe Terminal Block . . . . . . . . . . . . . 2-10

Wire Size and Terminal Screw Torque . . . . . . . . . . . . . 2-11

Wiring Input Devices to the Module . . . . . . . . . . . . . . . 2-11

Wiring RTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Wiring Resistance Devices (Potentiometers) . . . . . . . . . 2-14

Publication 1762-UM003A-EN-P - February 2003

2Table of Contents

Chapter 3

Module Data, Status, and Channel

Configuration

Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Input Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Accessing Input Image File Data . . . . . . . . . . . . . . . . . . . . 3-2

Input Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Input Data Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

General Status Flag Bits (S0 to S3) . . . . . . . . . . . . . . . . 3-3

Open-Circuit Flag Bits (OC0 to OC3) . . . . . . . . . . . . . . 3-4

Over-Range Flag Bits (O0 to O3) . . . . . . . . . . . . . . . . . 3-5

Under-Range Flag Bits (U0 to U3). . . . . . . . . . . . . . . . . 3-5

Configuring Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Configuration Data File . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Enabling or Disabling a Channel (Bit 15) . . . . . . . . . . . 3-9

Selecting Data Format (Bits 12 to 14) . . . . . . . . . . . . . . 3-9

Selecting Input/Sensor Type (Bits 8 to 11) . . . . . . . . . . 3-14

Selecting Temperature Units/Mode (Bit 7). . . . . . . . . . . 3-15

Selecting Open-Circuit Response (Bits 5 and 6) . . . . . . . 3-15

Selecting Cyclic Lead Compensation (Bit 4). . . . . . . . . . 3-16

Selecting Excitation Current (Bit 3) . . . . . . . . . . . . . . . . 3-16

Setting Filter Frequency (Bits 0 to 2) . . . . . . . . . . . . . . . 3-16

Selecting Enable/Disable Cyclic Autocalibration

(Word 4, Bit 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Determining Effective Resolution and Range . . . . . . . . . . . 3-20

Determining Module Update Time. . . . . . . . . . . . . . . . . . . 3-27

Effects of Autocalibration on Module Update Time . . . . 3-28

Calculating Module Update Time with Autocalibration

Enabled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Effects of Cyclic Lead Wire Compensation on

Module Update Time . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

Calculating Module Update Time with Cyclic Lead Wire

Compensation Enabled . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Impact of Autocalibration and Lead Wire Compensation

on Module Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32

Effects of Autocalibration on Accuracy . . . . . . . . . . . . . . . . 3-33

Chapter 4

Diagnostics and Troubleshooting

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Activating Devices When Troubleshooting . . . . . . . . . . 4-2

Stand Clear of the Equipment. . . . . . . . . . . . . . . . . . . . 4-2

Program Alteration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Module Operation vs. Channel Operation . . . . . . . . . . . . . 4-2

Publication 1762-UM003A-EN-P - February 2003

Table of Contents 3

Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Channel Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Invalid Channel Configuration Detection. . . . . . . . . . . . 4-3

Out-of-Range Detection . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Open-Wire or Short-Circuit Detection . . . . . . . . . . . . . . 4-4

Non-critical vs. Critical Module Errors . . . . . . . . . . . . . . . . 4-4

Module Error Definition Table . . . . . . . . . . . . . . . . . . . . . . 4-5

Module Error Field. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Extended Error Information Field . . . . . . . . . . . . . . . . . 4-6

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Module Inhibit Function . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . 4-8

Appendix A

Specifications

General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Input Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

RTD Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Appendix B

Configuring the 1762-IR4 Module

Using RSLogix 500

Module Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

1762-IR4 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . B-1

Configuration Using RSLogix 500 Version 5.50 or Higher . . B-2

Configuration Using RSLogix 500 Version 5.2 or Lower. . . . B-6

Appendix C

Two’s Complement Binary

Numbers

Positive Decimal Values . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Negative Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Glossary

Index

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4Table of Contents

1Publication 1762-UM003A-EN-P - February 2003

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

Manual

Use this manual if you are responsible for designing, installing,

programming, or troubleshooting control systems that use

MicroLogix 1200 controllers and 1762 Expansion I/O.

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-IR4.

Manual Contents

If you want... See

An overview of the RTD/resistance 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 module Appendix A

Information on programming the module using MicroLogix 1200 and

RSLogix 500 Appendix B

Information on understanding two’s complement binary numbers Appendix C

Definitions of terms used in this manual Glossary

Publication 1762-UM003A-EN-P - February 2003

2 Preface

Related Documentation

The table below provides a listing of publications that contain

important information about MicroLogix 1200 systems.

If you would like a manual, you can:

•download a free electronic version from the internet at

www.theautomationbookstore.com

•purchase a printed manual by:

–contacting your local distributor or Rockwell Automation

representative

–visiting www.theautomationbookstore.com and placing your

order

–calling 1.800.963.9548 (USA/Canada) or 001.330.725.1574

(Outside USA/Canada)

Conventions Used in This

Manual

The following conventions are used throughout this manual:

•Bulleted lists (like this one) provide information not procedural

steps.

•Numbered lists provide sequential steps or hierarchical

information.

•Italic type is used for emphasis.

For Read this document Document number

A user manual containing information on how to install,

use and program your MicroLogix 1200 controller MicroLogix™ 1200 User Manual 1762-UM001

An overview of the MicroLogix 1200 System, including

1762 Expansion I/O. MicroLogix™ 1200 Technical Data 1762-TD001

In-depth information on programming and using

MicroLogix 1200 controllers. MicroLogix 1200 Instruction Set Reference Manual 1762-RM001

In-depth information on grounding and wiring

Allen-Bradley programmable controllers. Allen-Bradley Programmable Controller Grounding and

Wiring Guidelines 1770-4.1

Publication 1762-UM003A-EN-P - February 2003

Preface 3

Rockwell Automation

Support

Rockwell Automation tests all of our products to ensure that they are

fully operational when shipped from the manufacturing facility.

If you are experiencing installation or startup problems, please review

the troubleshooting information contained in this publication first. If

you need technical assistance to get your module up and running,

please contact Customer Support (see the table below); our trained

technical specialists are available to help.

If the product is not functioning and needs to be returned, contact

your distributor. You must provide a Customer Support case number

to your distributor in order to complete the return process.

Your Questions or Comments on the Manual

If you find a problem with this manual, please notify us. If you have

any suggestions for how this manual could be made more useful to

you, please contact us at the address below:

Rockwell Automation

Automation Control and Information Group

Technical Communication, Dept. A602V

P.O. Box 2086

Milwaukee, WI 53201-2086

Phone United

States/Canada 1.440.646.5800

Outside United

States/Canada You can access the phone number for your country via

the Internet:

1. Go to http://support.rockwellautomation.com/

2. Under Contacting Customer Support and Other

Countries, click on Click here

Internet Worldwide Go to http://support.rockwellautomation.com/

Publication 1762-UM003A-EN-P - February 2003

4 Preface

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