Rockwell Automation Allen-Bradley FLEX Ex 1797-IRT8 Bedienungsanleitung

FLEX Ex

Thermocouple/

RTD/mV Input

Module

Cat. No. 1797-IRT8

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 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, 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 SGI-1.1, 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.

Throughout this manual we use notes to make you aware of safety

considerations:

Attention statements help you to:

•identify a hazard

•avoid a hazard

•recognize the consequences

Allen-Bradley, FLEX Ex, FLEX I/O, and ControlNet Ex are trademarks of Rockwell Automation

ControlNet is a trademark of ControlNet International

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.

3Publication 1797-6.5.2 - February 2001

Preface

Using This Manual

Why Read this Manual This manual shows you how to use your FLEX Exthermocouple/

RTD/mV module with the ControlNet Exproducts and ControlNet

network. The manual helps you install, program, and troubleshoot

your module.

Who Should Read this

Manual You must be able to program and operate a ControlNet Ex product

and ControlNetnetwork to make efficient use of a FLEX Ex module.

About the Vocabulary In this manual, we refer to the:

•1797-IRT8 as the “input module”. or “module.”

What this Manual

Contains The following chart lists each chapter with its corresponding title and

a brief overview of the topics covered in that chapter.

Chapter Title Contents

1About the FLEX Ex Analog Modules Describes features, capabilities,

and hardware components

2Understanding Configurable FLEX Ex

thermocouple/RTD/mV Input Module

Features

Describes configurable features of

the input module

3How to InstallYour Thermocouple/

RTD/mV Module How to install and wire the module

4Input, Output and Configuration Files

forthehermocouple/RTD/mVModule

on the ControlNet network

Describes communication over the

I/O backplane between the module

and the adapter, and how data is

mapped into the imagetable

5Calibrating Your Module Lists the tools needed, and the

methods used to calibrate the

module

6Applying FLEX Ex Analog Modules Learn how to evaluate, define,

select, match and optimize your

system.

7Troubleshooting Your Module How to use the indicators to

troubleshoot your module

Appendix Title Contents

ASpecifications Outlines module specifications and

accuracy

BProgramming the FLEX Ex Analog

Module using RIO Shows ladder diagramming for

programming.

Publication 1797-6.5.2 - February 2001

Using This Manual 4

For Additional

Information For additional information on FLEX Ex systems and modules, refer to

the following documents,

In Summary This preface gave you information on how to use this manual

efficiently. The next chapter introduces you to the 1797-IRT8

Thermocouple/RTD/mV Input module.

Catalog

Number Description Publications

Installation

Instructions User

Manual

1797 Series FLEX Ex Product Data 1797-2.1

(Product data)

1797 Series FLEX Ex System Overview 1797-2.2

(System

overview)

1797 Series ControlNet Ex System Cable Guide 1797-6.2.1

(Systemguide)

1797 Series FLEX Ex System Certification

Reference Manual 1797-6.2.6

1797-TB3 FLEX Ex Terminal Base 1797-5.1

1797-TB3S FLEX Ex Spring Clamp Terminal Base 1797-5.2

1797-OE8 FLEX Ex 8 Output Analog Module 1797-5.3 1797-6.5.1

1797-IRT8 FLEX Ex RTD/Thermocouple/mV

Module 1797-5.4 1797-6.5.2

1797-IE8 FLEX Ex 8 Input Analog Module 1797-5.5 1797-6.5.1

1797-IE8NF FLEX Ex 8 Input Analog Module w/

Noise Filter 1797-5.31 1797-6.5.1

1797-OB4D 4 Output Module 1797-5.6

1797-IBN16 FLEX Ex NAMUR Digital Input Module 1797-5.7

1797-IJ2 2 Frequency Input Module 1797-5.9 1797-6.5.4

1797-PS2N

1797-PS2E FLEX Ex Power Supplies 1797-5.12

1797-ACNR15 ControlNetEx Adapter 1797-5.14 1797-6.2.1

1797-RPA, -RPFM Fiber Hub 1797-5.15 1797-6.2.1

1797-BIC Bus Isolator 1797-5.13

1797-TPR,

- TPRS, -TPYR,

-TPYS

FLEX Ex Taps 1797-5.18 1797-6.2.1

1797-CE1S,

-CE3S, -CEFTN,

-CEFTE

Interconnect Cables 1797-5.20

1797-EXMK Marker Kit 1797-5.23

1797 FLEX Ex System Certification 1797-6.5.6

iPublication 1797-6.5.2 - February 2001

Table of Contents

Important User Information. . . . . . . . . . . . . . . . . . . . . . . . . . 2

Preface

Using This Manual

Why Read this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Who Should Read this Manual. . . . . . . . . . . . . . . . . . . . . . . . 3

About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

What this Manual Contains . . . . . . . . . . . . . . . . . . . . . . . . . . 3

For Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . 4

In Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table of Contents

Chapter 1

About the FLEX Ex Thermocouple/

RTD/mV Input Module

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 1-1

What the FLEX Ex Thermocouple/RTD/mV Modules Do. . . 1-1

How FLEX Ex Thermocouple/RTD/mV Modules

Communicate with Programmable Controllers . . . . . . . . . . 1-2

Events following Power-Up . . . . . . . . . . . . . . . . . . . . . 1-2

Features of Your Module. . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Using Alarms on the 1797-IRT8 Module . . . . . . . . . . . . . . . 1-3

Data Format Alarm Example. . . . . . . . . . . . . . . . . . . . . 1-4

Overrange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Underrange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Open Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Cold Junction Compensation Alarm . . . . . . . . . . . . . . . . . . . . 1-4

Data Formats and Fault Modes . . . . . . . . . . . . . . . . . . . 1-5

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2

Understanding Configurable FLEX

Ex Thermocouple/RTD/mV Input

Module Features

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Setting a FLEX Ex Thermocouple/RTD Module’s Operating

Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Input Type Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Sensor Type Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Input Filter Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Sensor Mode Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Preset Temperature Select . . . . . . . . . . . . . . . . . . . . . . 2-5

RTD Loop Resistance Offset Select . . . . . . . . . . . . . . . . 2-6

Fault Mode Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Using Module Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Overrange Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Underrange Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Publication 1797-6.5.2 - February 2001

Table of Contents ii

Chapter 3

How to Install Your FLEX Ex

Thermocouple/RTD/mV Module

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Before You Install Your Analog Module. . . . . . . . . . . . . . . 3-1

Compliance to European Union Directives. . . . . . . . . . . . . 3-2

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Ex Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Installation in Zone 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Electrostatic Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Removal and Insertion

Under Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Installing the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Mounting on a DIN Rail . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Panel/Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Mounting the 1797-IRT8 Module on the Terminal

Base Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Wiring the Terminal Base Units . . . . . . . . . . . . . . . . . . . . . 3-9

Connecting Wiring to the

FLEX Ex Thermocouple/RTD/mV Module . . . . . . . . . . . . . 3-10

Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Wiring connections for the 1797-IRT8 Module. . . . . . . . 3-11

Grounding the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Chapter 4

Input, Status, Output and

Configuration Files for the

Thermocouple/RTD/mVModuleon

the ControlNet Network

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Using Programming Software in Your FLEX Ex Application. 4-2

About the ControlNet Ex Adapter. . . . . . . . . . . . . . . . . . . . 4-2

Communication Over the FLEX Ex Backplane . . . . . . . . . . 4-2

Scheduled Data-Transfer . . . . . . . . . . . . . . . . . . . . . . . 4-3

Unscheduled Data-Transfer . . . . . . . . . . . . . . . . . . . . . 4-3

Module I/O Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

I/O Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Adapter Status Word . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Fault State Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Device Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Communication Fault Behavior. . . . . . . . . . . . . . . . . . . 4-6

Idle State Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Input Data Behavior upon Module Removal . . . . . . . . . 4-7

Thermocouple/RTD/mV Input Module (1797-IRT8) Image

Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Bit/Word Description for the Thermocouple/RTD/mV Input

Module (1797-IRT8) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Publication 1797-6.5.2 - February 2001

Table of Contents iii

Chapter 5

Calibrating Your Module

What This Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . 5-1

When and How to Calibrate Your FLEX Ex

Thermocouple/RTD/mV Input Module. . . . . . . . . . . . . . . . 5-1

Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Calibration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Chapter 6

Applying FLEX Ex Thermocouple/

RTD/mV Input Modules

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Evaluate the Application . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Define the Area Classification . . . . . . . . . . . . . . . . . . . . . . 6-2

Decide Classification Method . . . . . . . . . . . . . . . . . . . . 6-2

Determine Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Determine Temperature Rating. . . . . . . . . . . . . . . . . . . 6-2

Select Protection Method(s). . . . . . . . . . . . . . . . . . . . . . . . 6-3

Match Field Devices and I/O Modules . . . . . . . . . . . . . . . . 6-3

1797-IRT8 and Thermocouple and RTD Functional and IS

Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Using the Entity Method. . . . . . . . . . . . . . . . . . . . . . . . 6-5

Entity Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

General Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Interconnect Wiring 6-7

I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Optimize Power Distribution . . . . . . . . . . . . . . . . . . . . . . . 6-8

Assigning Power Supplies . . . . . . . . . . . . . . . . . . . . . . 6-8

Power Supply Considerations. . . . . . . . . . . . . . . . . . . . 6-9

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Chapter 7

Troubleshooting the FLEX Ex

Thermocouple/RTD/mV Input

Module

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Appendix A

Specifications

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

CE/CENELEC I/O Entity Parameters . . . . . . . . . . . . . . . . . . A-2

UL, C-UL I/O Entity Parameters . . . . . . . . . . . . . . . . . . . . . A-3

Table 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Wiring Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

FM I/O Entity Parameters . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Wiring Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Table 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Publication 1797-6.5.2 - February 2001

Table of Contents iv

Appendix B

Programming the FLEX Ex I/O

Modules

Using RIO

What this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . B-1

Enter Block Transfer

Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Using the PLC-5C Processor. . . . . . . . . . . . . . . . . . . . . . . . B-2

Index

Back Cover

1Publication 1797-6.5.2 - February 2001

Chapter

About the FLEX Ex Thermocouple/RTD/mV

Input Module

What this Chapter

Contains Read this chapter to familiarize yourself with the 1797-IRT8 input

module.

What the FLEX Ex

Thermocouple/RTD/mV

Modules Do

The 1797-IRT8 module accepts up to 8 thermocouple, RTD or mV

inputs. The inputs are nonisolated and are selected with analog

multiplexers which have a common-mode input range of -0.5 to +3.6

volts. The inputs will accept a millivolt or resistive input. Default input

spans are –40.00mV to +100.00mV or 0.00 to 500.00 ohms. Fault

Indicators are located on the field side.

No switches or jumpers are used on the thermocouple/RTD/mV input

module. The Inputs have both fixed hardware filters and selectable

firmware digital filters.

This module offers:

•local microprocessor intelligence for advanced features

•full functionality without switches or jumpers

•multiple data ranges that can be independently programmed in

channel groups

•lead breakage detection

•overrange/underrange alarms

as well as a host of other module features.

For information on: See page:

What the FLEX Ex Thermocouple/

RTD/mV Modules Do 1-1

How FLEX Ex Thermocouple/RTD/mV

Modules Communicate with

Programmable Controllers

1-2

Features of Your Module 1-2

Chapter Summary 1-5

Publication 1797-6.5.2 - February 2001

1-2 About the FLEX Ex Thermocouple/RTD/mV Input Module

How FLEX Ex

Thermocouple/RTD/mV

Modules

Communicate with

Programmable

Controllers

FLEX Ex thermocouple/RTD/mV modules provide best utility when

used with ControlNet Ex products on the ControlNet network. Data

connections are established between the I/O module and an

Allen-Bradley programmable controller to transfer information

between the two at a scheduled rate.

Input module information is then automatically made available in the

PLC data table.

When the data connection is established, configuration information

for the module is automatically transferred to it via the network.

Events following Power-Up

You must apply intrinsically safe +/-V power to your FLEX Ex I/O

modules. The following sequence of events occurs after power has

initially been applied to your module:

1. The module begins an interal diagnostic check. The channel 0 LED

indicator turns ON to indicate the check has begun. The indicator

turns OFF when the check is finished.

2. After the diagnostic check, module configuration information,

selected by the user and downloaded over the network, is applied

by the module.

For more information on configuration options, see Chapter 2.

3. Following the module configuration download for the 1797-IRT8

module, the module begins producing runtime data for the PLC.

4. If any diagnostics or alarms are generated during normal module

operation, the data is returned to the PLC.

Features of Your Module The module label identifies the keyswitch position, wiring and

module type. Use the removable label to note individual designations

per your application.

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