Rockwell Automation 1769-IT6 User Manual

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Compact I/O Thermocouple/mV Input Module

Catalog Numbers

User Manual

1769-IT6

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 office or online at http://www.rockwellautomation.com/literature/

) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited. Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

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. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence

available from your local Rockwell Automation sales

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.

IMPORTANT

Allen-Bradley, Ro ckwell Software, Roc kwell Automation, Compact I/O, MicroLo gix, CompactLogi x, RSLogix 500, RSLogix 5 000, RSNetWorx, and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Identifies information that is critical for successful application and understanding of the product.

Summary of Changes

We have added an Important statement about the placement of the 1769-IT6 module with regard to the Compact I/O power supplies on page 18

To help you find new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 3

Summary of Changes

Notes:

4 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Preface

Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Chapter 1

Overview

Quick Start for Experienced Users

Installation and Wiring

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Thermocouple/mV Inputs and Ranges . . . . . . . . . . . . . . . . . . . . . . . . . 11

Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Filter Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

General Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Module Field Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 2

Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

What You Need to Do. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter 3

Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . . . . . . . 23

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Preventing Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Removing Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Selecting a Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

System Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Minimum Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Replace a Single Module within a System . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 5

Table of Contents

Module Data, Status, and Channel Configuration

Field Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

System Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Terminal Door Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Removing and Replacing the Terminal Block . . . . . . . . . . . . . . . . . . . 32

Wire the Finger-safe Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Wire the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Cold Junction Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Chapter 4

Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Accessing Input Image File Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Input Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Input Data Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

General Status Bits (S0 through S7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Open-circuit Flag Bits (OC0 through OC7) . . . . . . . . . . . . . . . . . . . . 39

Over-range Flag Bits (O0 through O7) . . . . . . . . . . . . . . . . . . . . . . . . . 40

Under-range Flag Bits (U0 through U7) . . . . . . . . . . . . . . . . . . . . . . . . 40

Configuring Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Configuration Data File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Enabling or Disabling a Channel (bit 15) . . . . . . . . . . . . . . . . . . . . . . . 43

Selecting Data Formats (bits 14…12) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Selecting Input Type (bits 11…8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Selecting Temperature Units (bit 7). . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Determining Open-circuit Response (bits 6 and 5) . . . . . . . . . . . . . . 46

Selecting Input Filter Frequency (bits 2…0) . . . . . . . . . . . . . . . . . . . . . 46

Selecting Enable/Disable Cyclic Calibration (word 6, bit 0) . . . . . . 50

Determining Effective Resolution and Range . . . . . . . . . . . . . . . . . . . . . . . 50

Determining Module Update Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Effects of Autocalibration on Module Update Time . . . . . . . . . . . . . 70

Calculating Module Update Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Impact of Autocalibration on Module Startup

During Mode Change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Chapter 5

Diagnostics and Troubleshooting

6 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Stand Clear of Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Program Alteration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Safety Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Module Operation versus Channel Operation . . . . . . . . . . . . . . . . . . . . . . 76

Power-up Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Specifications

Two’s Complement Binary Numbers

Table of Contents

Channel Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Invalid Channel Configuration Detection . . . . . . . . . . . . . . . . . . . . . . 77

Over-range or Under-range Detection. . . . . . . . . . . . . . . . . . . . . . . . . . 77

Open-circuit Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Non-critical versus Critical Module Errors . . . . . . . . . . . . . . . . . . . . . . . . . 78

Module Error Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Module Error Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Extended-error Information Field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Module Inhibit Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Appendix A

Accuracy versus Thermocouple Temperature and Filter Frequency . . . 87

Temperature Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Appendix B

Positive Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Negative Decimal Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Thermocouple Descriptions

Using Thermocouple Junctions

Module Configuration by Using a MicroLogix 1500 System and RSLogix 500 Software

Appendix C

International Temperature Scale of 1990 . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Type B Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Type E Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Type J Thermocouples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Type K Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Type N Thermocouples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Type R Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Type S Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Type T Thermocouples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Appendix D

Using a Grounded Junction Thermocouple. . . . . . . . . . . . . . . . . . . . . . . . 135

Using an Ungrounded (isolated) Junction Thermocouple . . . . . . . . . . 137

Using an Exposed Junction Thermocouple . . . . . . . . . . . . . . . . . . . . . . . . 137

Appendix E

Module Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

1769-IT6 Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Configuring the 1769-IT6 Module in a MicroLogix 1500 System . . . 141

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 7

Table of Contents

Appendix F

Configuring Your 1769-IT6 Module with the Generic Profile

Configuring I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Configuring a 1769-IT6 Thermocouple Module . . . . . . . . . . . . . . . . . . . 150

for CompactLogix Controllers in RSLogix 5000 Software

Appendix G

Configuring Your 1769-IT6

Configuring the 1769-IT6 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Glossary

Index

8 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Read this preface to familiarize yourself with the rest of the manual.

Preface

Who Should Use This Manual

Additional Resources

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley Compact I/O and/or compatible controllers, such as MicroLogix 1500 or CompactLogix.

These documents contain additional information concerning related Rockwell Automation products.

Resource Description

MicroLogix 1500 User Manual, publication 1764-UM001

1769-ADN DeviceNet Adapter User Manual, publication 1769-UM001

CompactLogix User Manual, publication 1769-UM007

Programmable Controller Grounding and Wiring Guidelines, publication 1770-4.1

A user manual containing information on how to install, use, and program your MicroLogix 1500 controller

An overview of the Compact I/O system

A user manual that contains information on installing, using, and programming CompactLogix controllers

In-depth information on grounding and wiring Allen-Bradley programmable controllers

You can view or download publications at

http://www.rockwellautomation.com/literature

. To order paper copies of technical documentation, contact your local Rockwell Automation distributor or sales representative.

Conventions Used in This Manual

These conventions are used throughout this manual:

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

• Numbered lists provide sequential steps or hierarchical information.

• Bold type is used for emphasis.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 9

Preface

Notes:

10 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Chapter

Overview

This chapter describes the 1769-IT6 Thermocouple/mV Input Module and explains how the module reads thermocouple or millivolt analog input data. Included is information about:

• the module’s hardware and diagnostic features.

• an overview of system and module operation.

• compatibility.

General Description

The thermocouple/mV input module supports thermocouple and millivolt signal measurement. It digitally converts and stores thermocouple and/or millivolt analog data from any combination of up to six thermocouple or millivolt analog sensors. Each input channel is individually configurable via software for a specific input device, data format and filter frequency, and provides open-circuit, over-range and under-range detection and indication.

Thermocouple/mV Inputs and Ranges

The table below defines thermocouple types and their associated full-scale temperature ranges. The second table lists the millivolt analog input signal ranges that each channel will support. To determine the practical temperature range your thermocouple supports, see the specifications in Appendix

Thermocouple Ty pe

J -210…1200 °C -346…2192 °F K -270…1370 °C -454…2498 °F T -270…400 °C -454…752 °F E -270…1000 °C -454…1832 °F R 0…1768 °C 32…3214 °F S 0…1768 °C 32…3214 °F B 300…1820 °C 572…3308 °F N -210…1300 °C -346…2372 °F C 0…2315 °C 32…4199 °F CJC Sensor 0…85 °C 32…185 °F

°C Temperature Range °F Temperature Range

Millivolt Input Type Range

± 50 mV -50…50 mV ± 100 mV -100…100 mV

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 11

Chapter 1 Overview

Data Formats

The data can be configured on board each module as:

• engineering units x 1.

• engineering units x 10.

• scaled-for-PID.

• percent of full-scale.

• raw/proportional data.

Filter Frequencies

The module uses a digital filter that provides high frequency noise rejection for the input signals. The filter is programmable, allowing you to select from these six different filter frequencies for each channel:

• 10 Hz

• 50 Hz

• 60 Hz

• 250 Hz

• 500 Hz

• 1000 Hz

Hardware Features

The module contains a removable terminal block. Channels are wired as differential inputs. Two cold junction compensation (CJC) sensors are attached to the terminal block to enable accurate readings from each channel. These sensors compensate for offset voltages introduced into the input signal as a result of the cold-junction where the thermocouple wires are connected to the module.

Module configuration is normally done via the controller’s programming software. In addition, some controllers support configuration via the user program. In either case, the module configuration is stored in the memory of the controller. Refer to your controller’s user manual for more information.

12 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Figure 1 - Hardware Features

Overview Chapter 1

10a

10b

Thermocouple/mV

DANGER

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous

CJC 0+

IN 0+

CJC 0-

IN 0-

IN 3+

IN 1+

IN 3-

IN 1-

IN 4+

IN 2+

IN 4-

IN 2-

IN 5+

CJC 1-

IN 5-

CJC 1+

Ensure

Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-IT6

Thermocouple/mV

Item Description

1 Bus lever 2a Upper-panel mounting tab 2b Lower-panel mounting tab 3 Module status indicator 4 Module door with terminal identification label 5a Movable bus connector (bus interface) with female pins 5b Stationary bus connector (bus interface) with male pins 6 Nameplate label 7a Upper tongue-and-groove slots 7b Lower tongue-and-groove slots 8a Upper DIN-rail latch 8b Lower DIN-rail latch 9 Write-on label for user identification tags 10 Removable terminal block (RTB) with finger-safe cover 10a RTB upper-retaining screw 10b RTB lower-retaining screw 11 CJC sensors

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 13

Chapter 1 Overview

General Diagnostic Features

The module contains a diagnostic status indicator that helps you identify the source of anomalies that may occur during powerup or during normal channel operation. The status indicator indicates both status and power. Power-up and channel diagnostics are explained in Chapter

Troubleshooting.

5, Diagnostics and

System Overview

The modules communicate to the controller through the bus interface. The modules also receive 5 and 24V DC power through the bus interface.

System Operation

At powerup, the module performs a check of its internal circuits, memory, and basic functions. During this time, the module status indicator remains off. If no faults are found during power-up diagnostics, the module status indicator is turned on.

After power-up checks are complete, the module waits for valid channel configuration data. If an invalid configuration is detected, the module generates a configuration error. Once a channel is properly configured and enabled, it continuously converts the thermocouple or millivolt input to a value within the range selected for that channel.

Each time a channel is read by the input module, that data value is tested by the module for an over-range, under-range, open-circuit, or ‘input data not valid’ condition. If such a condition is detected, a unique bit is set in the channel status word. The channel status word is described in Input Data File

on page 38.

By using the module image table, the controller reads the two’s complement binary converted thermocouple or millivolt data from the module. This typically occurs at the end of the program scan or when commanded by the control program. If the controller and the module determine that the data transfer has been made without error, the data is used in the control program.

14 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Controller

Module Operation

When the module receives a differential input from an analog device, the module’s circuitry multiplexes the input into an A/D converter. The converter reads the signal and converts it as required for the type of input. The module also continuously samples the CJC sensors and compensates for temperature changes at the terminal block cold junction, between the thermocouple wire and the input channel.

16-pin Backplane Connector

Overview Chapter 1

18-pin Terminal Block

Module

Data

Module

Status

Module

Configuration

Data

1769 Bus

ASIC

+5V +15V GND -15V

+24V DC

24V GND

Opto--

couplers

(3)

Microprocessor

A/D

Converter

Isolated Power

Supply

Differential

8:1

Multiplexer

Circuits

Input

Protection

Circuitry

6 Differential

Thermocouple/mV

Inputs

CJC Sensors

Each channel can receive input signals from a thermocouple or millivolt analog input device, depending upon how you configured the channel.

When configured for thermocouple input types, the module converts the analog input voltages into cold-junction compensated and linearized digital temperature readings. The module uses the National Institute of Standards and Technology (NIST) ITS-90 standard for linearization for all thermocouple types ( J, K, T, E, R, S, B, N, C).

When configured for millivolt inputs, the module converts the analog values directly into digital counts.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 15

Chapter 1 Overview

Module Field Calibration

The module provides autocalibration, which compensates for offset and gain drift of the A/D converter caused by a temperature change within the module. An internal, high-precision, low drift voltage and system ground reference is used for this purpose. The input module performs autocalibration when a channel is initially enabled. In addition, you can program the module to perform a calibration cycle once every 5 minutes. See Selecting Enable/Disable Cyclic

Calibration (word 6, bit 0) on page 50 for information on configuring the

module to perform periodic autocalibration.

16 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Quick Start for Experienced Users

Chapter

Before You Begin

Required Tools and Equipment

This chapter can help you to get started using the 1769-IT6 thermocouple/mV input module. We base the procedures here on the assumption that you have an understanding of Allen-Bradley controllers. You should understand electronic process control and be able to interpret the ladder logic instructions required to generate the electronic signals that control your application.

Because it is a start-up guide for experienced users, this chapter does not contain detailed explanations about the procedures listed. It does, however, reference other chapters in this book where you can get more information about applying the procedures described in each step.

If you have any questions or are unfamiliar with the terms used or concepts presented in the procedural steps, always read the referenced chapters and other recommended documentation before trying to apply the information.

Have these tools and equipment ready:

• Medium blade or cross-head screwdriver

• Thermocouple or millivolt analog input device

• Shielded, twisted-pair cable for wiring

(Belden 8761 or equivalent for millivolt inputs, or shielded thermocouple extension wire for thermocouple inputs)

• Controller (for example, a MicroLogix 1500 or CompactLogix controller)

• Programming device and software (for example, RSLogix 500 or RSLogix 5000 software)

What You Need to Do

This chapter covers this information.

1. Be sure that your 1769 system

to support your system configuration.

2. Attach and lock the module.

3. Wire the module.

4. Configure the module.

5. Go through the start-up procedure.

6. Monitor the module status to check if the module is operating correctly.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 17

power supply has sufficient current output

Chapter 2 Quick Start for Experienced Users

Step 1

(1) The system power supply could be catalog number 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4, or the internal supply of the

MicroLogix 1500 packaged controller.

Be sure that your 1769 system power supply output to support your system configuration.

(1)

has sufficient current

Reference

Chapter

(Installation and Wiring)

The module’s maximum current draw is:

• 100 mA for 5V DC.

• 40 mA for 24V DC.

Step 2 Attach and lock the module. Reference

Chapter

(Installation and Wiring)

TIP

IMPORTANT

The module can be panel or DIN rail mounted. Modules can be assembled before or after mounting.

ATTENTION: Remove power before removing or inserting this module. If you remove or insert a module with power applied, an electrical arc may occur.

To reduce the effects of electrical noise, install the 1769-IT6 module at least two slots away from Compact I/O 120/240V AC power supplies.

1. Check that the bus lever of the module to be installed is in the unlocked (fully right) position.

2. Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller).

3. Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other.

4. Push the bus lever back slightly to clear the positioning tab (3) by using your fingers or a small screwdriver.

5. Move the bus lever fully to the left (4) until it clicks to allow communication between the controller and module.

18 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Quick Start for Experienced Users Chapter 2

Be sure the bus lever is locked firmly in place.

ATTENTION: When attaching I/O modules, it is very important that the bus connectors are securely locked together to be sure of proper electrical connection.

6. Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

7. Lock the end cap bus terminator (6).

IMPORTANT

Step 3 Wire the module. Reference

A 1769-ECR or 1769-ECL right or left end cap respectively must be used to terminate the end of the 1769 communication bus.

Chapter

(Installation and Wiring)

Follow these guidelines when wiring the module:

General Guidelines

• Power and input wiring must be in accordance with Class I, Division 2 wiring methods, Article 501-4(b) of the National Electric Code, NFPA 70, and in accordance with the authority having jurisdiction.

• Channels are isolated from one another by ±10V DC maximum.

• Route field wiring away from any other wiring and keep it as far as possible

from sources of electrical noise, such as motors, transformers, contactors, and AC devices. As a general rule, allow at least 15.2 cm (6 in.) of separation for every 120V of power.

• Routing field wiring in a grounded conduit can reduce electrical noise.

• If field wiring must cross AC or power cables, be sure that they cross at

right angles.

• If multiple power supplies are used with analog millivolt inputs, the power supply commons must be connected.

Terminal Block Guidelines

• Do not use the module’s NC terminals as connection points.

• Do not tamper with or remove the CJC sensors on the terminal block.

Removal of either one or both sensors will reduce accuracy.

• For millivolt sensors, use Belden 8761 shielded, twisted-pair wire (or equivalent) to be sure of proper operation and high immunity to electrical noise.

• For a thermocouple, use the shielded, twisted-pair thermocouple extension lead wires specified by the thermocouple manufacturer. Using the incorrect type of thermocouple extension wire or not following the correct polarity will cause invalid readings.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 19

Chapter 2 Quick Start for Experienced Users

• To be sure of optimum accuracy, limit overall cable impedance by keeping a cable as short as possible. Locate the module as close to input devices as the application permits.

Grounding Guidelines

ATTENTION: The possibility exists that a grounded or exposed thermocouple can become shorted to a potential greater than that of the thermocouple itself. Due to possible shock hazard, take care when wiring grounded or exposed thermocouples. See Appendix Thermocouple Junctions.

• This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded.

• Keep cable shield connections to ground as short as possible.

• Ground the shield drain wire at one end only. The preferred location is as

follows. – For grounded thermocouples or millivolt sensors, this is at the sensor

end.

– For insulated/ungrounded thermocouples, this is at the module end.

Contact your sensor manufacturer for additional details.

• Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1

, for additional information.

D, Using

Figure 2 - Terminal Connections with CJC Sensors

CJC 0+

CJC 0-

IN 3+

IN 3-

IN 4+

IN 4-

IN 5+

IN 5-

NC IN 0+

IN 0-

IN 1 +

IN 1-

IN 2+

IN 2-

CJC 1-

CJC 1+

20 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Quick Start for Experienced Users Chapter 2

Step 4 Configure the module. Reference

Chapter 4

(Module Data, Status, and Channel Configuration)

The configuration file is typically modified by using the programming software compatible with your controller. It can also be modified through the control program, if supported by the controller. See Channel Configuration for more information.

Step 5 Go through the start-up procedure. Reference

Chapter

(Diagnostics and Troubleshooting)

1. Apply power to the controller system.

2. Download your program, which contains the thermocouple module

configuration settings, to the controller.

3. Put the controller in Run mode.

on page 42

During a normal startup, the module status indicator turns on.

TIP

Step 6 Monitor the module status to check if the module is operating

correctly

If the module status indicator does not turn on, cycle power. If the condition persists, contact your local distributor or Rockwell Automation for assistance.

Module and channel configuration errors are reported to the controller. These errors are typically reported in the controller’s I/O status file.

Channel status data is also reported in the module’s input data table, so these bits can be used in your control program to flag a channel error.

Reference

Chapter

(Diagnostics and Troubleshooting)

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 21

Chapter 2 Quick Start for Experienced Users

Notes:

22 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Installation and Wiring

This chapter tells you how to:

• determine the power requirements for the modules.

• avoid electrostatic damage.

• install the module.

• wire the module’s terminal block.

• wire input devices.

Chapter

Compliance to European Union Directives

This product is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

The 1769-IT6 module is tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

• EN 50081-2 EMC—Generic Emission Standard, Part 2 - Industrial Environment

• EN 50082-2 EMC—Generic Immunity Standard, Part 2 - Industrial Environment

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 61131-2 Programmable Controllers, Part 2 – Equipment Requirements and Tests.

For specific information required by EN61131-2, see the appropriate sections in this publication, as well as the Industrial Automation, Wiring and Grounding Guidelines for Noise Immunity, publication 1770-4.1.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 23

Chapter 3 Installation and Wiring

Power Requirements

General Considerations

The module receives power through the bus interface from the 5/24V DC system power supply. The maximum current drawn by the module is:

• 100 mA at 5V DC.

• 40 mA at 24V DC.

Compact I/O modules are suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is

(1)

intended for use in clean, dry environments (Pollution Degree 2 circuits not exceeding Over Voltage Category II

(2)

(IEC 60664-1).

) and to

(3)

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.

WARNING: Explosion Hazard

• Substitution of components may impair suitability for Class I, Division 2.

• Do not replace components or disconnect equipment unless power has

been switched off or the area is known to be non-hazardous.

• Do not connect or disconnect components unless power has been

switched off or the area is known to be non-hazardous.

• This product must be installed in an enclosure.

• All wiring must comply with N.E.C. article 501-4(b).

(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that

occasionally a temporary conductivity caused by condensation shall be expected.

(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient

voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)

designations.

24 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Preventing Electrostatic Discharge

ATTENTION: Electrostatic discharge can damage integrated circuits or

semiconductors if you touch analog I/O module bus connector pins or the terminal block on the input module. Follow these guidelines when you handle the module:

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch the bus connector or connector pins.

• Do not touch circuit components inside the module.

• Use a static-safe work station, if available.

• Keep the module in its static-shield bag when it is not in use.

Removing Power

ATTENTION: Remove power before removing or inserting this module.

When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field devices, causing

unintended machine motion.

• causing an explosion in a hazardous environment.

Electrical arcing causes excessive wear to contacts on both the module and its mating connector and may lead to premature failure.

Installation and Wiring Chapter 3

Selecting a Location

Consider reducing noise and power supply distance when selecting a location.

Reducing Noise

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs will reduce the performance (accuracy) of the module.

Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the analog module. Position the module:

• away from sources of electrical noise such as hard-contact switches, relays, and AC motor drives.

• away from modules which generate significant radiated heat, such as the 1769-IA16 module. Refer to the module’s heat dissipation specification.

In addition, route shielded, twisted-pair analog input wiring away from any high voltage I/O wiring.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 25

Chapter 3 Installation and Wiring

MicroLogix 1500 Controller with Integrated System Power Supply

Power Supply Distance

You can install as many modules as your power supply can support. However, all 1769 I/O modules have a power supply distance ratings. The maximum I/O module rating is eight, which means that a module may not be located more than eight modules away from the system power supply.

Compact I/O

End Cap

Compact I/O

2345678

Adapter

I/O Communication

Compact I/O

1123432

Power Supply Distance

End Cap

Compact I/O

System Power Supply

Power Supply Distance

26 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Installation and Wiring Chapter 3

System Assembly

The module can be attached to the controller or an adjacent I/O module before or after mounting. For mounting instructions, see Panel Mounting by Using the

Dimensional Template on page 29, or DIN Rail Mounting on page 29. To work

with a system that is already mounted, see Replace a Single Module within a

System on page 30.

Follow this procedure to assemble the Compact I/O system.

IMPORTANT

To reduce the effects of electrical noise, install the 1769-IT6 module at least two slots away from the AC power supplies.

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the unlocked

(fully right) position.

TIP

If the module is being installed to the left of an existing module, check that the right-side adjacent module’s bus lever is in the unlocked (fully right) position.

3. Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller).

4. Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other.

5. Push the bus lever back slightly to clear the positioning tab (3) by using your fingers or a small screwdriver.

6. To allow communication between the controller and module, move the bus lever fully to the left (4) until it clicks.

Be sure it is locked firmly in place.

ATTENTION: When attaching I/O modules, it is very important that the bus connectors are securely locked together to be sure of proper electrical connection.

7. Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 27

Chapter 3 Installation and Wiring

8. Lock the end cap bus terminator (6).

Mounting

IMPORTANT

ATTENTION: During panel or DIN rail mounting of all devices, be sure

that all debris (metal chips, wire strands) is kept from falling into the module. Debris that falls into the module could cause damage at powerup.

A 1769-ECR or 1769-ECL right or left end cap respectively must be used to terminate the end of the bus.

Minimum Spacing

Maintain spacing from enclosure walls, wireways, adjacent equipment, and so forth. Allow 50 mm (2 in.) of space on all sides for adequate ventilation, as shown below.

Top

Side Side

Host Controller

Compact I/O

Bottom

Compact I/O

End Cap

Compact I/O

Panel Mounting

Mount the module to a panel by using two screws per module. Use M4 or #8 panhead screws. Mounting screws are required on every module.

28 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Installation and Wiring Chapter 3

Panel Mounting by Using the Dimensional Template

For more than 2 modules: (number of modules-1) X 35 mm (1,38 in.).

Refer to host controller documentation for this dimension.

132

(5.197)

(1.38)

28.5

(1.12)

Important: All dimensions are in mm (inches). Hole spacing tolerance: ±0.04 mm (0.016 in.).

Panel Mounting Procedure by Using Modules as a Template

The following procedure allows you to use the assembled modules as a template for drilling holes in the panel. If you have sophisticated panel mounting equipment, you can use the dimensional template provided on page 29 module mounting hole tolerance, it is important to follow these procedures.

1. On a clean work surface, assemble no more than three modules.

2. Using the assembled modules as a template, carefully mark the center of all

module-mounting holes on the panel.

3. Return the assembled modules to the clean work surface, including any previously mounted modules.

4. Drill and tap the mounting holes for the recommended M4 or #8 screw.

5. Place the modules back on the panel, and check for proper hole alignment.

122.6±0.2

(4.826±0.008)

Compact I/O

Host Controller

Compact I/O

Right End Cap

. Due to

6. Attach the modules to the panel by using the mounting screws.

TIP

7. Repeat steps 1…6

If mounting more modules, mount only the last one of this group and put the others aside. This reduces remounting time during drilling and tapping of the next group.

for any remaining modules.

DIN Rail Mounting

The module can be mounted by using either of these DIN rails:

• 35 x 7.5 mm (EN 50 022 - 35 x 7.5)

• 35 x 15 mm (EN 50 022 - 35 x 15)

Before mounting the module on a DIN rail, close the DIN rail latches. Press the DIN rail mounting area of the module against the DIN rail. The latches will momentarily open and lock into place.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 29

Chapter 3 Installation and Wiring

Replace a Single Module within a System

The module can be replaced while the system is mounted to a panel (or DIN rail). Follow these steps in order.

1. Remove power.

See the important note on page 27

2. On the module to be removed, remove the upper and lower mounting screws from the module (or open the DIN latches with screwdriver).

3. Move the bus lever to the right to disconnect (unlock) the bus.

4. On the right-side adjacent module, move its bus lever to the right (unlock)

to disconnect it from the module to be removed.

5. Gently slide the disconnected module forward.

If you feel excessive resistance, check that the module has been disconnected from the bus, and that both mounting screws have been removed (or DIN latches opened).

TIP

6. Before installing the replacement module, be sure that the bus lever on the module to be installed and on the right-side adjacent module or end cap are in the unlocked (fully right) position.

It may be necessary to rock the module slightly from front to back to remove it, or, in a panel-mounted system, to loosen the screws of adjacent modules.

Field Wiring Connections

7. Slide the replacement module into the open slot.

8. Connect the modules together by locking (fully left) the bus levers on the

replacement module and the right-side adjacent module.

9. Replace the mounting screws (or snap the module onto the DIN rail).

Use these guidelines when making field wiring connections.

System Wiring Guidelines

Consider these guidelines when wiring your system:

General Guidelines

• Power and input wiring must be in accordance with Class 1, Division 2 wiring methods, Article 501-4(b) of the National Electric Code, NFPA 70, and in accordance with the authority having jurisdiction.

• Channels are isolated from one another by ±10V DC maximum.

• Route field wiring away from any other wiring and as far as possible from

sources of electrical noise, such as motors, transformers, contactors, and AC devices. As a general rule, allow at least 15.2 cm (6 in.) of separation for every 120V of power.

30 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Installation and Wiring Chapter 3

• Routing field wiring in a grounded conduit can reduce electrical noise.

• If field wiring must cross AC or power cables, be sure that they cross at

right angles.

• If multiple power supplies are used with analog millivolt inputs, the power supply commons must be connected.

Terminal Block Guidelines

• Do not use the module’s NC terminals as connection points.

• Do not tamper with or remove the CJC sensors on the terminal block.

Removal of one or both sensors will reduce accuracy.

• For millivolt sensors, use Belden 8761 shielded, twisted-pair wire (or equivalent) to be sure of proper operation and high immunity to electrical noise.

• To be sure of optimum accuracy, limit overall cable impedance by keeping a cable as short as possible. Locate the module as close to input devices as the application permits.

Grounding Guidelines

• Keep cable shield connections to ground as short as possible.

• Ground the shield drain wire at one end only. The typical location is as

follows: – For grounded thermocouples or millivolt sensors, this is at the sensor

end.

– For insulated/ungrounded thermocouples, this is at the module end.

Contact your sensor manufacturer for additional details.

• If it is necessary to connect the shield drain wire at the module end, connect it to earth ground using a panel or DIN rail mounting screw.

• Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1

, for additional information.

D, Using

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 31

Chapter 3 Installation and Wiring

Noise Prevention Guidelines

• To limit the pickup of electrical noise, keep thermocouple and millivolt signal wires as far as possible from power and load lines.

• If noise persists for a device, try grounding the opposite end of the cable shield. (You can ground only one end at a time.)

Terminal Door Label

A removable, write-on label is provided with the module. Remove the label from the door, mark your unique identification of each terminal with permanent ink, and slide the label back into the door. Your markings (ID tag) will be visible when the module door is closed.

Removing and Replacing the Terminal Block

When wiring the module, you do not have to remove the terminal block. If you remove the terminal block, use the write-on label located on the side of the terminal block to identify the module location and type.

SLOT # _____

MODULE TYPE ______

To remove the terminal block, loosen the upper and lower retaining screws. The terminal block will back away from the module as you remove the screws. Be careful not to damage the CJC sensors. When replacing the terminal block, torque the retaining screws to 0.46 N•m (4.1 lb•in).

Upper Retaining Screw

Lower Retaining Screw

Wiring the Finger-safe Terminal Block

32 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Installation and Wiring Chapter 3

Wire the Finger-safe Terminal Block

When wiring the terminal block, keep the finger-safe cover in place.

1. Loosen the terminal screws to be wired.

2. Route the wire under the terminal pressure plate.

You can use the bare wire or a spade lug. The terminals accept a 6.35 mm (0.25 in.) spade lug.

TIP

3. Tighten the terminal screw making sure the pressure plate secures the wire.

Recommended torque when tightening terminal screws is 0.68 N•m (6 lb•in).

TIP

The terminal screws are non-captive. Therefore, it is possible to use a ring lug [maximum 1/4 inch o.d. with a 0.139 inch minimum i.d. (M3.5)] with the module.

If you need to remove the finger-safe cover, insert a screwdriver into one of the square, wiring holes and gently pry the cover off. If you wire the terminal block with the finger-safe cover removed, you may not be able to put it back on the terminal block because the wires will be in the way.

Wire Size and Terminal Screw Torque

Each terminal accepts up to two wires with these restrictions.

Wire Type Wire Size Terminal Screw

Solid Cu-90 °C (194 °F) 0.325…2.080 mm2

(22…14 AWG)

Stranded Cu-90 °C (194 °F) 0.325…1.310 mm2

(22…16 AWG)

Torque

0.68 N•m (6 lb•in) 0.46 N•m (4.1 lb•in)

Retaining Screw Torque

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 33

Chapter 3 Installation and Wiring

Wire the Module

ATTENTION: To prevent shock hazard, care should be taken when wiring

the module to analog signal sources. Before wiring any module, disconnect power from the system power supply and from any other source to the module.

After the module is properly installed, follow the wiring procedure below, using the proper thermocouple extension cable, or Belden 8761 for non-thermocouple applications.

Cut foil shield and drain wire.

Signal Wire

Drain Wire

Cable

Foil Shield

Signal Wire

Follow these steps to wire your module.

1. At each end of the cable, strip some casing to expose the individual wires.

2. Trim the signal wires to 2 in. (5 cm) lengths.

3. Strip about 3/16 in. (5 mm) of insulation away to expose the end of the

wire.

ATT ENTI ON: Be careful when stripping wires. Wire fragments that fall into a module could cause damage at powerup.

4. At one end of the cable, twist the drain wire and foil shield together, bend them away from the cable, apply shrink wrap, and then earth ground at the preferred location based on the type of sensor you are using.

See Grounding Guidelines

on page 31.

5. At the other end of the cable, cut the drain wire and foil shield back to the cable and apply shrink wrap.

6. Connect the signal wires to the terminal block. Connect the other end of the cable to the analog input device.

7. Repeat steps 1…5

TIP

34 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

for each channel on the module.

See Appendix information on wiring grounded, ungrounded, and exposed thermocouple types.

D, Using Thermocouple Junctions, for additional

Figure 3 - Wiring Diagram

Installation and Wiring Chapter 3

CJC Sensor

Ungrounded Thermocouple

CJC 0+

CJC 0-

IN 3+

IN 3-

IN 4+

IN 4-

IN 5+

IN 5-

NC IN 0+

IN 0-

IN 1 +

IN 1-

IN 2+

IN 2-

TIP

IMPORTANT

Grounded Thermocouple

Within 10V DC

CJC 1-

CJC 1+

When using an ungrounded thermocouple, the shield must be connected to ground at the module end.

When using grounded and/or exposed thermocouples that are touching electrically conductive material, the ground potential between any two channels cannot exceed ±10V DC, or temperature readings will be inaccurate.

CJC Sensor

Grounded Thermocouple

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 35

Chapter 3 Installation and Wiring

Cold Junction Compensation

Calibration

To obtain accurate readings from each of the channels, the cold junction temperature (temperature at the module’s terminal junction between the thermocouple wire and the input channel) must be compensated for. Two cold junction compensating thermistors have been integrated in the removable terminal block. These thermistors must remain installed to retain accuracy.

ATTENTION: Do not remove or loosen the cold junction compensating thermistor assemblies located on between the two upper and lower CJC terminals. Both thermistor assemblies are critical to be sure of accurate thermocouple input readings at each channel. The module will operate in the Thermocouple mode, but at reduced accuracy if either CJC sensor is removed. See

page 46.

Determining Open-circuit Response (bits 6 and 5) on

If either of the thermistor assemblies are accidentally removed, re-install them by connecting each one across each pair of CJC terminals.

The thermocouple module is initially calibrated at the factory. The module also has an autocalibration function.

When an autocalibration cycle takes place, the module’s multiplexer is set to system ground potential and an A/D reading is taken. The A/D converter then sets its internal input to the module’s precision voltage source, and another reading is taken. The A/D converter uses these numbers to compensate for system offset (zero) and gain (span) errors.

Autocalibration of a channel occurs whenever a channel is enabled. You can also program your module to perform cyclic calibration cycles, every five minutes.

See

Selecting Enable/Disable Cyclic Calibration (word 6, bit 0) on page 50.

To maintain optimal system accuracy, periodically perform an autocalibration cycle.

IMPORTANT

The module does not convert input data while the calibration cycle is in progress following a change in configuration. Module scan times are increased by up to 112 ms during cyclic autocalibration.

36 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Chapter

Module Data, Status, and Channel Configuration

After installing the 1769-IT6 thermocouple/mV input module, you must configure it for operation, usually by using the programming software compatible with the controller (for example, RSLogix 500 or RSLogix 5000 software). Once configuration is complete and reflected in the ladder logic, you need to operate the module and verify its configuration.

This chapter contains information on the following:

• Module memory map

• Accessing input image file data

• Configuring channels

• Determining effective resolution and range

• Determining module update time

Module Memory Map

slot e

Input Image

File

slot e

Configuration

File

The module uses eight input words for data and status bits (input image), and seven configuration words.

Memory Map

Word 0 Word 1 Word 2 Word 3

Word 4 Word 5

Word6

Word 7

Word 0 Word 1 Word 2 Word 3

Word 4 Word 5

Word 6

Input Image

8 words

Configuration

File

7 words

TIP

Channel 0 Data Word Channel 1 Data Word

Channel 2 Data Word Channel 3 Data Word Channel 4 Data Word Channel 5 Data Word

General/Open-Circuit Status Bits

Over-/Under-range Bits

Channel 0 Configuration Word Channel 1 Configuration Word Channel 2 Configuration Word Channel 3 Configuration Word Channel 4 Configuration Word Channel 5 Configuration Word

Module Configuration Word

Bit 15 Bit 0

Not all controllers support program access to the configuration file. Refer to your controller’s user manual.

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 37

Chapter 4 Module Data, Status, and Channel Configuration

Accessing Input Image File Data

The input image file represents data words and status words. Input words 0…5 hold the input data that represents the value of the analog inputs for channels 0…5. These data words are valid only when the channel is enabled and there are no errors. Input words 6 and 7 hold the status bits. To receive valid status information, the channel must be enabled.

You can access the information in the input image file by using the programming software configuration screen. For information on configuring the module in a:

• MicroLogix 1500 system by using RSLogix 500 software, see Appendix

• CompactLogix system by using RSLogix 5000 software, see Appendix

• 1769-ADN DeviceNet adapter by using RSNetWorx software,

Input Data File

see Appendix

The input data table allows you to access module read data for use in the control

program, via word and bit access. The data table structure is shown in this table.

Table 1 - Input Data Table

(1)

Word/Bit

0 Analog Input Data Channel 0 1 Analog Input Data Channel 1 2 Analog Input Data Channel 2 3 Analog Input Data Channel 3 4 Analog Input Data Channel 4 5 Analog Input Data Channel 5 6 OC7OC6OC5OC4OC3OC2OC1OC0S7S6S5S4S3S2S1S0 7 U0 O0U1O1U2O2U3O3U4O4U5O5U6O6U7O7

1514131211109876543210

(1) Changing bit values is not supported by all controllers. Refer to your controller manual for details.

Input Data Values

Data words 0…5 correspond to channels 0…5 and contain the converted analog input data from the input device. The most significant bit, bit 15, is the sign bit (SGN).

38 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

General Status Bits (S0 through S7)

Bits S0 through S5 of word 6 contain the general status information for channels 0…5, respectively. Bits S6 and S7 contain general status information for the two CJC sensors (S6 corresponds to CJC0, S7 to CJC1). If set (1), these bits indicate an error (over- or under-range, open-circuit, or input data not valid condition) associated with that channel. The data not valid condition is described below.

Input Data Not Valid Condition

The general status bits S0 to S5 also indicate whether the input data for a particular channel, 0…5, is being properly converted (valid) by the module. This ‘invalid data’ condition can occur (bit set) when the download of a new configuration to a channel is accepted by the module (proper configuration), but before the A/D converter can provide valid (properly configured) data to the 1769 bus master/controller. The following information highlights the bit operation of the input data not valid condition.

1. The default and module power-up bit condition is reset (0).

2. The bit condition is set (1) when a new configuration is received and

determined valid by the module.

The set (1) bit condition remains until the module begins converting analog data for the previously accepted new configuration. When conversion begins, the bit condition is reset (0). The amount of time it takes for the module to begin the conversion process depends on the number of channels being configured and the amount of configuration data downloaded by the controller.

TIP

If the new configuration is invalid, the bit function remains reset (0) and the module posts a configuration error. See

Errors on page 79.

Configuration

3. If A/D hardware errors prevent the conversion process from taking place, the bit condition is set (1).

Open-circuit Flag Bits (OC0 through OC7)

Bits OC0 through OC5 of word 6 contain open-circuit error information for channels 0…5, respectively. Errors for the CJC sensors are indicated in OC6 and OC7. The bit is set (1) when an open-circuit condition exists. See

Detection on page 77 for more information on open-circuit operation.

Open-circuit

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 39

Chapter 4 Module Data, Status, and Channel Configuration

Over-range Flag Bits (O0 through O7)

Over-range bits for channels 0…5 and the CJC sensors are contained in word 7, even-numbered bits. They apply to all input types. When set (1), the over-range flag bit indicates an input signal that is at the maximum of its normal operating range for the represented channel or sensor. The module automatically resets (0) the bit when the data value falls below the maximum for that range.

Under-range Flag Bits (U0 through U7)

Under-range bits for channels 0…5 and the CJC sensors are contained in word 7, odd-numbered bits. They apply to all input types. When set (1), the under-range flag bit indicates an input signal that is at the minimum of its normal operating range for the represented channel or sensor. The module automatically resets (0) the bit when the under-range condition is cleared and the data value is within the normal operating range.

Configuring Channels

After module installation, you must configure operation details, such as thermocouple type and temperature units, for each channel. Channel configuration data for the module is stored in the controller configuration file, which is both readable and writable.

The configuration data file is shown below. Bit definitions are provided in

Channel Configuration

configuration parameters follow the table.

on page 42. Detailed definitions of each of the

40 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

Configuration Data File

The default value of the configuration data is represented by zeros in the data file. The structure of the channel configuration file is shown below.

Word/

Bit

6Reserved

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Enable

Channel

Enable

Channel

Enable

Channel

Enable

Channel

Enable

Channel

Enable

Channel

Data Format

Channel 0

Data Format

Channel 1

Data Format

Channel 2

Data Format

Channel 3

Data Format

Channel 4

Data Format

Channel 5

Input Type Channel 0

Input Type Channel 1

Input Type Channel 2

Input Type Channel 3

Input Type Channel 4

Input Type Channel 5

Temperature

Units Channel

Temperature

Units Channel

Temperature

Units Channel

Temperature

Units Channel

Temperature

Units Channel

Temperature

Units Channel

Open-circuit

Condition

Channel 0

Open-circuit

Condition

Channel 1

Open-circuit

Condition

Channel 2

Open-circuit

Condition

Channel 3

Open-circuit

Condition

Channel 4

Open-circuit

Condition

Channel 5

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Not

Used

Filter Frequency Channel 0

Filter Frequency Channel 1

Filter Frequency Channel 2

Filter Frequency Channel 3

Filter Frequency Channel 4

Filter Frequency Channel 5

The configuration file can also be modified through the control program, if supported by the controller. For information on configuring the module in a:

• MicroLogix 1500 system by using RSLogix 500 software,

see Appendix

• CompactLogix system by using RSLogix 5000 software,

see Appendix

• 1769-ADN DeviceNet adapter by using RSNetWorx software,

see Appendix

Enable/Disable Cyclic Calibration

The structure and bit settings are shown in Channel Configuration

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 41

on page 42.

Chapter 4 Module Data, Status, and Channel Configuration

Channel Configuration

Each channel configuration word consists of bit fields, the settings of which determine how the channel operates. See this table and the descriptions that follow for valid configuration settings and their meanings.

To select Make these bit settings

1514131211109876543210

Filter frequency 10 Hz

60 Hz 50 Hz 250Hz 500 Hz 1 kHz

Open circuit Upscale

Downscale 01 Hold last state 10 Zero 11

Temperature units

Input type Thermocouple J 0000

Data format Raw/proportional 000

Enable channel Disable 0

(1) An attempt to write any non-valid (spare) bit configuration into any selection field results in a module configuration error.

°C 0 °F 1

Thermocouple K 0001 Thermocouple T 0010 Thermocouple E 0011 Thermocouple R 0100 Thermocouple S 0101 Thermocouple B 0110 Thermocouple N 0111 Thermocouple C 1000

-50…50 mV 1001

-100…100 mV 1010

Engineering units 001 Engineering units x 10 100 Scaled-for-PID 010 Percent range 011

Enable 1

110 000 001 011 100 101

(1)

Not used

TIP

Default settings for a particular function are indicated by zeros. For example, the default filter frequency is 60 Hz.

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Module Data, Status, and Channel Configuration Chapter 4

Enabling or Disabling a Channel (bit 15)

You can enable or disable each of the six channels individually by using bit 15. The module scans enabled channels only. Enabling a channel forces it to be recalibrated before it measures input data. Disabling a channel sets the channel data word to zero.

TIP

When a channel is not enabled (0), no input is provided to the controller by the A/D converter. This speeds up the response of the active channels, improving performance.

Selecting Data Formats (bits 14…12)

This selection configures channels 0…5 to present analog data in any of these formats:

• Raw/Proportional Data

• Engineering Units x 1

• Engineering Units x 10

• Scaled-for-PID

• Percent Range

Table 2 - Channel Data Word Format

Input Ty pe

J -2100…12,000 -3460…21,920 -210…1200 -346…2192 K -2700…13,700 -4540…24,980 -270…1370 -454…2498 T -2700…4000 -4540…7520 -270…400 -454…752 E -2700…10,000 -4540…18,320 -270…1000 -454…1832 R 0…17,680 320…32,140 0…1768 32…3214 S 0…17,680 320…32,140 0…1768 32…3214 B 3000…18,200

N -2100…13,000 -3460…23,720 -210…1300 -346…2372 C 0…23,150

±50 mV ±100 mV

(1) Type B and C thermocouples cannot be represented in engineering units x1 (°F) above 3276.7 °F; therefore, it will be treated as an over-range error.

(2) When millivolts are selected, the temperature setting is ignored. Analog input date is the same for °C or °F selection.

Data Format Engineering Units x 1 Engineering Units x 10 Scaled-for-PID Raw/ °C °F °C °F

0…16,383 -32,767…32,767 0…10,000

-5000…5000

-10,000…10,000

(2)

5720…32,767

320…32,767

(2)

(1)

300…1820 572…3308

(1)

0…2315 32…4199

-500…500

-1000…1000

(2)

Proportional Data

Percent Range

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 43

Chapter 4 Module Data, Status, and Channel Configuration

TIP

The engineering units data formats represent real engineering temperature units provided by the module to the controller. The raw/proportional counts, scaled-for-PID, and percent of full-scale data formats, may yield the highest effective resolutions, but may also require that you convert channel data to real engineering units in your control program.

Raw/Proportional Data

The value presented to the controller is proportional to the selected input and scaled into the maximum data range allowed by the bit resolution of the A/D converter and filter selected. The raw/proportional data format also provides the best resolution of all the data formats.

If you select the raw/proportional data format for a channel, the data word will be a number between -32,767 and 32,767. For example, if a type J thermocouple is selected, the lowest temperature of -210 °C (-346 °F) corresponds to -32,767 counts. The highest temperature of 1200 °C (2192 °F) corresponds to 32,767.

See

Determining Effective Resolution and Range on page 50.

Engineering Units x 1

When using this data format for a thermocouple or millivolt input, the module scales the thermocouple or millivolt input data to the actual engineering values for the selected millivolt input or thermocouple type. It expresses temperatures in

0.1 °C or 0.1 °F units. For millivolt inputs, the module expresses voltages in

0.01 mV units.

TIP

Use the engineering units x 10 setting to produce temperature readings in whole degrees Celsius or Fahrenheit.

The resolution of the engineering units x 1 data format is dependent on the range selected and the filter selected. See

Determining Effective Resolution and Range

on page 50.

Engineering Units x 10

When using a thermocouple input with this data format, the module scales the input data to the actual temperature values for the selected thermocouple type. With this format, the module expresses temperatures in 1 °C or 1 °F units. For millivolt inputs, the module expresses voltages in 0.1 mV units.

The resolution of the engineering units x 10 data format is dependent on the range selected and the filter selected. See

Range on page 50.

Determining Effective Resolution and

44 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

Scaled-for-PID

The value presented to the controller is a signed integer, with 0 representing the lower input range and 16,383 representing the upper input range.

To obtain the value, the module scales the input signal range to 0…16,383, which is standard to the PID algorithm for the MicroLogix 1500 controller and other Allen-Bradley controllers (for example, SLC controllers). For example, if a type J thermocouple is used, the lowest temperature for the thermocouple is -210 °C (-346 °F), which corresponds to 0 counts. The highest temperature in the input range, 1200 °C (2192 °F), corresponds to 16,383 counts.

Percent Range

Input data is presented as a percentage of the specified range. The module scales the input signal range to 0…10,000. For example, using a type J thermocouple, the range -210…1200 °C (-346…2192 °F) is represented as 0…100%. See

Determining Effective Resolution and Range on page 50.

Selecting Input Type (bits 11…8)

Bits 11…8 in the channel configuration word indicate the type of thermocouple or millivolt input device. Each channel can be individually configured for any type of input.

Selecting Temperature Units (bit 7)

The module supports two different linearized/scaled ranges for thermocouples, degrees Celsius (°C) and degrees Fahrenheit (°F). Bit 7 is ignored for millivolt input types, or when raw/proportional, scaled-for-PID, or percent data formats are used.

IMPORTANT

If you are using engineering units x 1 data format and degrees Fahrenheit temperature units, thermocouple types B and C cannot achieve full-scale temperature with 16-bit signed numerical representation. An over-range error will occur for the configured channel if it tries to represent the full-scale value. The maximum representable temperature is 1802.61 °C (3276.7 °F).

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Chapter 4 Module Data, Status, and Channel Configuration

Determining Open-circuit Response (bits 6 and 5)

An open-circuit condition occurs when an input device or its extension wire is physically separated or open. This can happen if the wire is cut or disconnected from the terminal block.

TIP

If either CJC sensor is removed from the module terminal block, its open-circuit bit is set (1) and the module continues to calculate thermocouple readings at reduced accuracy. If an open CJC circuit is detected at powerup, the module uses 25 °C (77 °F) as the sensed temperature at that location. If an open CJC circuit is detected during normal operation, the last valid CJC reading is used. An input channel configured for millivolt input is not affected by CJC open-circuit conditions. See Open-circuit Detection

on page 77 for additional details.

Bits 6 and 5 define the state of the channel data word when an open-circuit condition is detected for the corresponding channel. The module overrides the actual input data depending on the option that you specify when it detects an open circuit. The open-circuit options are explained in this table.

Table 3 - Open-circuit Response Definitions

Response Option Definition

Upscale Sets the input data value to full upper scale value of channel data word. The

Downscale Sets the input data value to full lower scale value of channel data word. The low

Last State Sets the input data value to the last input value prior to the detection of the

Zero Sets the input data value to 0 to force the channel data word to 0.

full-scale value is determined by the selected input type and data format.

scale value is determined by the selected input type and data format.

open-circuit.

Selecting Input Filter Frequency (bits 2…0)

The input filter selection field allows you to select the filter frequency for each channel and provides system status of the input filter setting for channels 0…5. The filter frequency affects the following, as explained later in this chapter:

• Noise rejection characteristics for module inputs

• Channel step response

• Channel cut-off frequency

• Effective resolution

• Module update time

Effects of Filter Frequency on Noise Rejection

The filter frequency that you choose for a module channel determines the amount of noise rejection for the inputs. A lower frequency (50 Hz versus 500 Hz) provides better noise rejection and increases effective resolution, but also increases channel update time. A higher filter frequency provides lower noise rejection, but decreases the channel update time and effective resolution.

46 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

When selecting a filter frequency, be sure to consider cut-off frequency and channel step response to obtain acceptable noise rejection. Choose a filter frequency so that your fastest-changing signal is below that of the filter’s cut-off frequency.

Common Mode Rejection is better than 115 dB at 50 and 60 Hz, with the 50 and 60 Hz filters selected, respectively, or with the 10 Hz filter selected. The module performs well in the presence of common mode noise as long as the signals applied to the user positive and negative input terminals do not exceed the common mode voltage rating (±10V) of the module. Improper earth ground may be a source of common mode noise.

TIP

Transducer power supply noise, transducer circuit noise, or process variable irregularities may also be sources of normal mode noise. The filter frequency of the module’s CJC sensors is the lowest filter frequency of any enabled thermocouple type to maximize the trade-offs between effective resolution and channel update time.

Effects of Filter Frequency on Channel Step Response

The selected channel filter frequency determines the channel’s step response. The step response is the time required for the analog input signal to reach 100% of its expected final value, given a full-scale step change in the input signal. This means that if an input signal changes faster than the channel step response, a portion of that signal will be attenuated by the channel filter. The channel step response is calculated by a settling time of 3 x (1/filter frequency).

Table 4 - Filter Frequency and Step Response

Filter Frequency Step Response

10 Hz 300 ms 50 Hz 60 ms 60 Hz 50 ms 250 Hz 12 ms 500 Hz 6 ms 1 kHz 3 ms

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Chapter 4 Module Data, Status, and Channel Configuration

Channel Cut-off Frequency

The filter cut-off frequency, -3 dB, is the point on the frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation. This table shows cut-off frequencies for the supported filters.

Table 5 - Filter Frequency versus Channel Cut-off Frequency

Filter Frequency Cut-off Frequency

10 Hz 2.62 Hz 50 Hz 13.1 Hz 60 Hz 15.7 Hz 250 Hz 65.5 Hz 500 Hz 131 Hz 1 kHz 262 Hz

All input frequency components at or below the cut-off frequency are passed by the digital filter with less than 3 dB of attenuation. All frequency components above the cut-off frequency are increasingly attenuated as shown in the graphs on

page 49

48 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

0 –20 –40 –60

–80

-100

-120

Gain (dB)

-140

-160

-180

- 200

2.62 Hz

Module Data, Status, and Channel Configuration Chapter 4

Figure 4 - Frequency Response Graphs

10 Hz Input Filter Frequency 50 Hz Input Filter Frequency

–3 dB

Frequency (Hz) Frequency (Hz)

0 –20 –40 –60

–80

-100

Gain (dB)

-120

-140

-160

-180

- 200 0

13. 1 Hz

–3 dB

100

150

300

250

200

0 –20 –40 –60

–80

-100

-120

Gain (dB)

-140

-160

-180

- 200

0 –20 –40 –60

–80

-100

-120

Gain (dB)

-140

-160

-180

- 200

1 5.72 Hz

131 Hz

60 Hz Input Filter Frequency

–3 dB

180

120

Frequency (Hz)

500 Hz Input Filter Frequency

–3 dB

Frequency (Hz)

240

2000

300

360

250 Hz Input Filter Frequency

Gain (dB)

0 –20 –40 –60

–80

-100

-120

-140

-160

-180

- 200 0

65 .5 Hz

–3 dB

Frequency (Hz)

900

1300

1150750500250

1000 Hz Input Filter Frequency

0 –20 –40 –60

–80

-100

-120

Gain (dB)

-140

-160

-180

30000 250015001000500

- 200 0

262 Hz

–3 dB

Frequency (Hz)

5K3K2K1K

The cut-off frequency for each channel is defined by its filter frequency selection. Choose a filter frequency so that your fastest changing signal is below that of the filter’s cut-off frequency. The cut-off frequency should not be confused with the update time. The cut-off frequency relates to how the digital filter attenuates frequency components of the input signal. The update time defines the rate at which an input channel is scanned and its channel data word is updated.

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Chapter 4 Module Data, Status, and Channel Configuration

Selecting Enable/Disable Cyclic Calibration (word 6, bit 0)

Cyclic calibration functions to reduce offset and gain drift errors due to temperature changes within the module. By setting word 6, bit 0 to 0, you can configure the module to perform calibration on all enabled channels. Setting this bit to 1 disables cyclic calibration.

You can program the calibration cycle to occur whenever you desire for systems that allow modifications to the state of this bit via the ladder program. When the calibration function is enabled (bit = 0), a calibration cycle occurs once for all enabled channels. If the function remains enabled, a calibration cycle occurs every five minutes thereafter. The calibration cycle of each enabled channel is staggered over several module scan cycles within the five minute period to limit impact on the system response speed.

See

Effects of Autocalibration on Module Update Time on page 70.

Determining Effective Resolution and Range

The effective resolution for an input channel depends upon the filter frequency selected for that channel. The following graphs provide the effective resolution for each of the range selections at the six available frequencies. These graphs do not include the affects of unfiltered input noise. Choose the frequency that most closely matches your requirements.

50 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Effective Resolution (°C)

Module Data, Status, and Channel Configuration Chapter 4

Figure 5 - Effective Resolution versus Input Filter Selection for Type B Thermocouples Using 10, 50, and 60 Hz Filters

3.0

2.5

2.0

1.5

1.0

0.5

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Temperature (°C)

10 Hz Filter 50 Hz Filter 60 Hz Filter

5.0

4.5

4.0

3.5

3.0

2.5

2.0

10 Hz Filter 50 Hz Filter 60 Hz Filter

1.5

Effective Resolution (°F)

1.0

0.5 0

0 500 1000 1500 2000 2500 3000 3500

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 6 - Effective Resolution versus Input Filter Selection for Type B Thermocouples Using 250, 500, and 1 kHz Filters

200 180 160 140 120 100

Effective Resolution (°C)

250 Hz Filter 500 Hz Filter 1 kHz Filter

40 20

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Temperature (°C)

350

300

250

200

250 Hz Filter 500 Hz Filter

150

1 kHz Filter

100

Effective Resolution (°F)

0 500 1000 1500 2000 2500 3000 3500

Temperature (°F)

52 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Effective Resolution (°C)

Module Data, Status, and Channel Configuration Chapter 4

Figure 7 - Effective Resolution versus Input Filter Selection for Type C Thermocouples Using 10, 50, and 60 Hz Filters

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1 0

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Temperature (°C)

10 Hz 50 Hz 60 Hz

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Effective Resolution (°F)

0.4

0.2

10 Hz 50 Hz 60 Hz

0 500 1000 1500 2000 2500 3000 3500 4000 4500

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 8 - Effective Resolution versus Input Filter Selection for Type C Thermocouples Using 250, 500, and 1 kHz Filters

90 80 70 60 50 40 30

Effective Resolution (°C)

20 10

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

250 Hz 500 Hz 1 kHz

160

140

120

100

Effective Resolution (°F)

Temperature (°C)

0 500 1000 1500 2000 2500 3000 3500 4000 4500

Temperature (°F)

250 Hz 500 Hz 1 kHz

54 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

Figure 9 - Effective Resolution versus Input Filter Selection for Type E Thermocouples Using 10, 50, and 60 Hz Filters

Effective Resolution (°C)

-400 -200 0 200 400 600 800 1000

Temperature (°C)

10 Hz 50 Hz 60 Hz

Effective Resolution (°F)

-500 0 500 1000 1500 2000

Temperature (°F)

10 Hz 50 Hz 60 Hz

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 10 - Effective Resolution versus Input Filter Selection for Type E Thermocouples Using 250, 500, and 1 kHz Filters

Effective Resolution (°C)

250 Hz 500 Hz 1 kHz

-400 -200 0 200 400 600 800 1000

Temperature (°C)

160

140

120

100

Effective Resolution (°F)

-500 0 500 1000 1500 2000

Temperature (°F)

250 Hz 500 Hz 1 kHz

56 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

0.5

0.4

Module Data, Status, and Channel Configuration Chapter 4

Figure 11 - Effective Resolution versus Input Filter Selection for Type J Thermocouples Using 10, 50, and 60 Hz Filters

0.3

0.2

Effective Resolution (°C)

0.1

-300 200 700 1200

Temperature (°C)

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Effective Resolution (°F)

0.2

10 Hz 50 Hz 60 Hz

0.1

-400 0 400 800 1200 1600 2000

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 12 - Effective Resolution versus Input Filter Selection for Type J Thermocouples Using 250, 500, and 1 kHz Filters

Effective Resolution (°C)

-300 200 700 1200

250 Hz 500 Hz 1 kHz

Temperature (°C)

100

90 80 70 60 50 40 30

Effective Resolution (°F)

20 10

-400 0 400 800 1200 1600 2000

Temperature (°F)

250 Hz 500 Hz 1 kHz

58 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Module Data, Status, and Channel Configuration Chapter 4

Figure 13 - Effective Resolution versus Input Filter Selection for Type K Thermocouples Using 10, 50, and 60 Hz Filters

Effective Resolution (°C)

-400 -200 0 200 400 600 800 1000 1200 1400

Temperature (°C)

10 Hz 50 Hz 60 Hz

Effective Resolution (°F)

-500 0 500 1000 1500 2000 2500

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 14 - Effective Resolution versus Input Filter Selection for Type K Thermocouples Using 250, 500, and 1 kHz Filters

120

100

Effective Resolution (°C)

-400 -200 0 200 400 600 800 1000 1200 1400

250 Hz 500 Hz 1 kHz

Temperature (°C)

200 180 160 140 120 100

250 Hz 500 Hz 1 kHz

Effective Resolution (°F)

40 20

-500 0 500 1000 1500 2000 2500

Temperature (°F)

60 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Effective Resolution (°C)

Module Data, Status, and Channel Configuration Chapter 4

Figure 15 - Effective Resolution versus Input Filter Selection for Type N Thermocouples Using 10, 50, and 60 Hz Filters

1.2

1.0

0.8

0.6

0.4

0.2

-400 -200 0 200 400 600 800 1000 1200 1400

Temperature (°C)

10 Hz 50 Hz 60 Hz

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Effective Resolution (°F)

0.4

0.2 0

-400 0 400 800 1200 1600 2000 2400

Temperature (°F)

10 Hz 50 Hz 60 Hz

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 16 - Effective Resolution versus Input Filter Selection for Type N Thermocouples Using 250, 500, and 1 kHz Filters

100

90 80 70 60 50 40 30

Effective Resolution (°C)

20 10

-400 -200 0 200 400 600 800 1000 1200 1400

Temperature (°C)

180

160

140

120

100

Effective Resolution (°F)

250 Hz 500 Hz 1 kHz

-400 0 400 800 1200 1600 2000 2400

Temperature (°F)

62 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

1.6

1.4

1.2

Module Data, Status, and Channel Configuration Chapter 4

Figure 17 - Effective Resolution versus Input Filter Selection for Type R Thermocouples Using 10, 50, and 60 Hz Filters

Effective Resolution (°C)

1.0

0.8

0.6

0.4

0.2

0 200 400 600 800 1000 1200 1400 1600 1800

Temperature (°C)

3.0

2.5

2.0

1.5

1.0

10 Hz 50 Hz 60 Hz

Effective Resolution (°F)

0.5

0 500 1000 1500 2000 2500 3000

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 18 - Effective Resolution versus Input Filter Selection for Type R Thermocouples Using 250, 500, and 1 kHz Filters

120

100

Effective Resolution (°C)

0 200 400 600 800 1000 1200 1400 1600 1800

250 Hz 500 Hz 1 kHz

Temperature (°C)

200 180 160 140 120 100

80 60

Effective Resolution (°F)

250 Hz 500 Hz 1 kHz

40 20

0 500 1000 1500 2000 2500 3000

Temperature (°F)

64 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

1.6

1.4

1.2

Module Data, Status, and Channel Configuration Chapter 4

Figure 19 - Effective Resolution versus Input Filter Selection for Type S Thermocouples Using 10, 50, and 60 Hz Filters

Effective Resolution (°C)

Effective Resolution (°F)

1.0

0.8

0.6

0.4

0.2

0 200 400 600 800 1000 1200 1400 1600 1800

Temperature (°C)

3.0

2.5

2.0

1.5

1.0

10 Hz 50 Hz 60 Hz

0.5

0 500 1000 1500 2000 2500 3000

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 20 - Effective Resolution versus Input Filter Selection for Type S Thermocouples Using 250, 500, and 1 kHz Filters

120

100

Effective Resolution (°C)

0 200 400 600 800 1000 1200 1400 1600 1800

250 Hz 500 Hz 1 kHz

Temperature (°C)

200 180 160 140 120 100

Effective Resolution (°F)

250 Hz 500 Hz 1 kHz

40 20

0 500 1000 1500 2000 2500 3000

Temperature (°F)

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Module Data, Status, and Channel Configuration Chapter 4

Figure 21 - Effective Resolution versus Input Filter Selection for Type T Thermocouples Using 10, 50, and 60 Hz Filters

Effective Resolution (°C)

-300 -200 -100 0 100 200 300 400

Temperature (°C)

Effective Resolution (°F)

10 Hz 50 Hz 60 Hz

-500 -400 -300 -200 -100 0 100 200 300 400 500 600 700 800

Temperature (°F)

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Chapter 4 Module Data, Status, and Channel Configuration

Figure 22 - Effective Resolution versus Input Filter Selection for Type T Thermocouples Using 250, 500, and 1 kHz Filters

Effective Resolution (°C)

-300 -200 -100 0 100 200 300 400

Temperature (°C)

140

120

100

250 Hz 500 Hz 1 kHz

Effective Resolution (°F)

-500 -400 -300 -200 -100 0 100 200 300 400 500 600 700 800

Temperature (°F)

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Module Data, Status, and Channel Configuration Chapter 4

Table 6 - Effective Resolution versus Input Filter Selection for Millivolt Inputs

Filter Frequency ±50 mV ±100 mV

10 Hz 6 µV 6 µV 50 Hz 9 µV 12 µV 60 Hz 9 µV 12 µV 250 Hz 125 µV 150 µV 500 Hz 250 µV 300 µV 1 kHz 1000 µV 1300 µV

The table below identifies the number of significant bits used to represent the input data for each available filter frequency. The number of significant bits is defined as the number of bits that will have little of no jitter due to noise, and is used in defining the effective resolution.

Determining Module Update Time

Enabled Enabled Enabled Enabled

Channel 4 Disabled Channel 5 Disabled No Thermocouple Calibration Not Active

Enabled Enabled TC Enabled

TIP

The resolutions provided by the filters apply to the raw/proportional data format only.

The module update time is defined as the time required for the module to sample and convert the input signals of all enabled input channels and provide the resulting data values to the processor. Module update time can be calculated by adding the sum of all enabled channel’s times. The module sequentially samples the enabled channels in a continuous loop as shown below.

Sample

Channel 0

Sample

Channel 4

Sample

Channel 1

Sample

Channel 5

Sample

Channel 2

Sample

CJC

Calibration

Active

Sample

Channel 3

Perform

Calibration

Channel update time is dependent upon the input filter selection. This table shows the channel update times.

Table 7 - Channel Update Time

Filter Frequency Channel Update Time

10 Hz 303 ms 50 Hz 63 ms 60 Hz 53 ms 250 Hz 15 ms 500 Hz 9 ms 1 kHz 7 ms

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Chapter 4 Module Data, Status, and Channel Configuration

The CJC input is sampled only if one or more channels are enabled for any thermocouple type. The CJC update time is equal to the largest channel update time of any of the enabled thermocouple inputs types. In that case, a single CJC update is done per scan. See the scan diagram on the previous page. The cyclic calibration time applies only when cyclic calibration is enabled and active. If enabled, the cyclic calibration is staggered over several scan cycles once every five minutes to limit the overall impact to module update time.

Effects of Autocalibration on Module Update Time

The module’s autocalibration feature allows it to correct for accuracy errors caused by temperature drift over the module operating temperature range (0…60 °C (32…140 °F)). Autocalibration occurs automatically on a system mode

change from Program-to-Run for all configured channels or if any online configuration change is made to a channel. In addition, you can configure the module to perform autocalibration every 5 minutes during normal operation, or you can disable this feature by using the Enable/Disable Cyclic Calibration function (default is enabled). This feature allows you to implement a calibration

cycle anytime, at your command, by enabling and then disabling this bit.

(1)

(1) Not all controllers allow online configuration changes. Refer to your controller’s user manual for details.

During an online configuration change, input data for the affected channel is not updated by the module.

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Module Data, Status, and Channel Configuration Chapter 4

If you enable the cyclic autocalibration function, the module update time increases when the autocalibration occurs. To limit its impact on the module update time, the autocalibration function is divided over two module scans. The first part (offset/0) of a channel calibration adds 71 ms and the second part (gain/span) adds 112 ms to the module update. This takes place over two consecutive module scans. Each enabled channel requires a separate offset/0 and gain/span cycle, unless any channel to be scanned uses an Input Type of the same Input Class as any previously calibrated channel. See the figure on page 69

and the Input Class table below. In that case, offset and gain calibration values from the previous channel are used, and no additional time is required.

Table 8 - Input Class

Input Type Input Class

Thermocouples B, C, R, S, and T 1 Thermocouples E, J, K, and N 2 50 mV 2 100 mV 3 CJC Sensors 4

Calculating Module Update Time

To determine the module update time, add the individual channel update times for each enabled channel and the CJC update time if any of the channels are enabled as thermocouple inputs.

EXAMPLE

1. Two Channels Enabled for Millivolt Inputs

Channel 0: ±50 mV with 60 Hz filter Channel 1 Input: ±50 mV with 500 Hz filter From Channel Update Time, on page 42

Module Update Time

= Ch 0 Update Time + Ch 1 Update Time = 53 ms + 9 ms = 62 ms

2. Three Channels Enabled for Different Inputs Channel 0 Input: Type J Thermocouple with 10 Hz filter Channel 1 Input: Type J Thermocouple with 60 Hz filter Channel 2 Input: ±100 mV with 250 Hz filter From Channel Update Time, on page 42

Module Update Time

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time (uses lowest thermocouple filter selected) = 303 ms + 53 ms + 15 ms + 303 ms = 674 ms

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Chapter 4 Module Data, Status, and Channel Configuration

EXAMPLE

3. Three Channels Enabled for Different Inputs with Cyclic Calibration Enabled

Channel 0 Input: Type T Thermocouple with 60 Hz Filter Channel 1 Input: Type T Thermocouple with 60 Hz Filter Channel 2 Input: Type J Thermocouple with 60 Hz Filter From Channel Update Time, on page 42

Module Update Time ‘without’ an Autocalibration Cycle

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time (uses lowest thermocouple filter selected) = 53 ms + 53 ms + 53 ms + 53 ms = 212 ms

Module Update Time ‘during’ an Autocalibration Cycle

Channel 0 Scan 1 (Module Scan 1) = Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘Ch 0 Gain Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘112 ms’ = 324 ms

Channel 0 Scan 3 (Module Scan 2)

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘Ch 0 Offset Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘71 ms’ = 283 ms

Channel 1 Scan 1 (no scan impact)

No autocalibration cycle is required because Channel 1 is the same Input Class as Channel 0. Data is updated in scan 3.

Channel 2 Scan 1 (Module Scan 3)

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘Ch 2 Gain Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘112 ms’ = 324 ms

Channel 2 Scan 2 (Module Scan 4)

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘Ch 2 Offset Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘71 ms’ = 283 ms

CJC Scan 1 (Module Scan 5)

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘CJC Gain Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘112 ms’ = 324 ms

CJC Scan 2 (Module Scan 6)

= Ch 0 Update Time + Ch 1 Update Time + Ch 2 Update Time + CJC Update Time + ‘CJC Offset Time’ = 53 ms + 53 ms + 53 ms + 53 ms + ‘71 ms’ = 283 ms After the above cycles are complete, the module returns to scans without autocalibration for approximately 5 minutes. At that time, the autocalibration cycle repeats.

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Module Data, Status, and Channel Configuration Chapter 4

Impact of Autocalibration on Module Startup During Mode Change

Regardless of the selection of the Enable/Disable Cyclic Calibration function, an autocalibration cycle occurs automatically on a mode change from Program-to-Run and on subsequent module startups/initialization for all configured channels. During module startup, input data is not updated by the module and the General Status bits (S0 through S5) are set to 1, indicating a Data Not Valid condition. The amount of time it takes the module to start up is dependent on channel filter frequency selections as indicated in Channel Update

Time, on page 69. This is an example calculation of module start-up time.

EXAMPLE

Two Channels Enabled for Different Inputs

Channel 0 Input: Type T Thermocouple with 60 Hz filter Channel 1 Input: Type J Thermocouple with 60 Hz filter

Module Start-up Time

= (Ch 0 Gain Time + Ch 0 Offset Time) + (Ch 1 Gain Time + Ch 1 Offset Time) + (CJC Gain Time + CJC Offset Time) + (CJC 0 Data Acquisition + CJC 1 Data Acquisition + Ch 0 Data Acquisition + Ch 1 Data Acquisition) = (112 ms + 71 ms) + (112 ms + 71 ms) + (53 ms + 53 ms + 53 ms + 53 ms) = 183 ms + 183 ms + 183 ms + 212 ms = 761 ms

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Chapter 4 Module Data, Status, and Channel Configuration

Notes:

74 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Chapter

Diagnostics and Troubleshooting

This chapter describes troubleshooting the thermocouple/mV input module. This chapter contains information on:

• safety considerations while troubleshooting.

• internal diagnostics during module operation.

• module errors.

• contacting Rockwell Automation for technical assistance.

Safety Considerations

Safety considerations are an important element of proper troubleshooting procedures. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance.

The following sections describe several safety concerns you should be aware of when troubleshooting your control system.

ATTENTION: Never reach into a machine to actuate a switch because unexpected motion can occur and cause injury. Remove all electrical power at the main power disconnect switches before checking electrical connections or inputs/outputs causing machine motion.

Indicator Lights

When the green status indicator on the module is illuminated, it indicates that power is applied to the module and that it has passed its internal tests.

Stand Clear of Equipment

When troubleshooting any system anomaly, have all personnel remain clear of the equipment. The anomaly could be intermittent, and sudden unexpected machine motion could occur. Have someone ready to operate an emergency stop switch in case it becomes necessary to shut off power.

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Chapter 5 Diagnostics and Troubleshooting

Program Alteration

There are several possible causes of alteration to the user program, including extreme environmental conditions, Electromagnetic Interference (EMI), improper grounding, improper wiring connections, and unauthorized tampering. If you suspect a program has been altered, check it against a previously saved master program.

Safety Circuits

Circuits installed on the machine for safety reasons, like over-travel limit switches, stop push buttons, and interlocks, should always be hard-wired to the master control relay. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, thereby removing power to the machine. Never alter these circuits to defeat their function. Serious injury or machine damage could result.

Module Operation versus Channel Operation

Power-up Diagnostics

The module performs diagnostic operations at both the module level and the channel level. Module-level operations include functions such as power-up, configuration, and communication with a 1769 bus master, such as a MicroLogix 1500 controller, 1769-ADN DeviceNet adapter, or CompactLogix controller.

Channel-level operations describe channel related functions, such as data conversion and over- or under-range detection.

Internal diagnostics are performed at both levels of operation. When detected, module error conditions are immediately indicated by the module status indicator. Both module hardware and channel configuration error conditions are reported to the controller. Channel over-range or under-range and open-circuit conditions are reported in the module’s input data table. Module hardware errors are typically reported in the controller’s I/O status file. Refer to your controller manual for details.

At module powerup, a series of internal diagnostic tests are performed. If these diagnostic tests are not successfully completed, the module status indicator remains off and a module error is reported to the controller.

If module status indciator is

On Proper operation No action required. Off Module fault Cycle power. If condition persists, replace the module.

Indicated condition

Corrective action

Call your local distributor or Rockwell Automation for assistance.

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Diagnostics and Troubleshooting Chapter 5

Channel Diagnostics

When an input channel is enabled, the module performs a diagnostic check to see that the channel has been properly configured. In addition, the channel is tested on every scan for configuration errors, over-range and under-range, and open-circuit conditions.

Invalid Channel Configuration Detection

Whenever a channel configuration word is improperly defined, the module reports an error. See page 78

through page 81 for a description of module errors.

Over-range or Under-range Detection

Whenever the data received at the channel word is out of the defined operating range, an over-range or under-range error is indicated in input data word 7.

Possible causes of an out-of-range condition include the:

• temperature is too hot or cold for the type of thermocouple being used.

• wrong thermocouple is being used for the input type selected, or for the

configuration that was programmed.

• input device is faulty.

• signal input from the input device is beyond the scaling range.

Open-circuit Detection

On each scan, the module performs an open-circuit test on all enabled channels. Whenever an open-circuit condition occurs, the open-circuit bit for that channel is set in input data word 6.

Possible causes of an open circuit include:

• the input device is broken.

• a wire is loose or cut.

• the input device is not installed on the configured channel.

• a thermocouple is installed incorrectly.

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Chapter 5 Diagnostics and Troubleshooting

Non-critical versus Critical Module Errors

Non-critical module errors are typically recoverable. Channel errors (over-range or under-range errors) are non-critical. Non-critical error conditions are indicated in the module input data table.

Critical module errors are conditions that may prevent normal or recoverable operation of the system. When these types of errors occur, the system typically leaves the run or program mode of operation until the error can be dealt with.

Module Error Definition

Critical module errors are indicated in Table 11 on page 80

Analog module errors are expressed in two fields as four-digit hex format with the

most significant digit as ‘don’t care’ and irrelevant. The two fields are ‘Module Error’ and ‘Extended Error Information’. The structure of the module error data is shown below.

Table 9 - Module Error Table

‘Don’t Care’ Bits Module Error Extended Error Information

1514131211109876543210

0000000000000000

Hex Digit 4 Hex Digit 3 Hex Digit 2 Hex Digit 1

Module Error Field

The purpose of the module error field is to classify module errors into three distinct groups, as described in the table below. The type of error determines what kind of information exists in the extended error information field. These types of module errors are typically reported in the controller’s I/O status file. Refer to your controller manual for details.

Table 10 - Module Error Types

Error Type Module Error

No errors 000 No error is present. The extended error field holds no

Hardware errors 001 General and specific hardware error codes are specified

Configuration errors

Field Value Bits 11…9 (binary)

010 Module-specific error codes are indicated in the

Description

additional information.

in the extended error information field.

extended error field. These error codes correspond to options that you can change directly. For example, the input range or input filter selection.

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Diagnostics and Troubleshooting Chapter 5

Extended-error Information Field

Check the extended error information field when a non-zero value is present in the module error field. Depending upon the value in the module error field, the extended error information field can contain error codes that are module-specific or common to all 1769 analog modules.

TIP

If no errors are present in the module error field, the extended error information field is set to zero.

Hardware Errors

General or module-specific hardware errors are indicated by module error code

001. See Table 11 on page 80

Configuration Errors

If you set the fields in the configuration file to invalid or unsupported values, the module generates a critical error.

Table 11 on page 80

defined for the modules.

lists the possible module-specific configuration error codes

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Chapter 5 Diagnostics and Troubleshooting

Error Codes

This table explains the extended error code.

Table 11 - Extended Error Codes

Error Type Hex

Equivalent

No error X000 000 0 0000 0000 No error General common

hardware error

Hardware-specific error

X200 001 0 0000 0000 General hardware error; no additional information X201 001 0 0000 0001 Power-up reset state X300 001 1 0000 0000 General hardware error; no additional information X301 001 1 0000 0001 Microprocessor hardware error; hardware ROM error X302 001 1 0000 0010 Hardware EEPROM error X303 001 1 0000 0011 Channel 0 calibration error X304 001 1 0000 0100 Channel 1 calibration error X305 001 1 0000 0101 Channel 2 calibration error X306 001 1 0000 0110 Channel 3 calibration error X307 001 1 0000 0111 Channel 4 calibration error X308 001 1 0000 1000 Channel 5 calibration error X309 001 1 0000 1001 CJC0 calibration error X30A 001 1 0000 1010 CJC1 calibration error X30B 001 1 0000 1011 Channel 0 analog/digital converter error X30C 001 1 0000 1100 Channel 1 analog/digital converter error X30D 001 1 0000 1101 Channel 2 analog/digital converter error X30E 001 1 0000 1110 Channel 3 analog/digital converter error X30F 001 1 0000 1111 Channel 4 analog/digital converter error X310 001 1 0001 0000 Channel 5 analog/digital converter error X311 001 1 0001 0001 CJC0 analog/digital converter error X312 001 1 0001 0010 CJC1 analog/digital converter error

Module

(1)

Error Code

Binary Binary

Extended Error Information Code

Error Description

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Table 11 - Extended Error Codes

Diagnostics and Troubleshooting Chapter 5

Error Type Hex

Equivalent

Module-specific configuration error

X400 010 0 0000 0000 General configuration error; no additional information X401 010 0 0000 0001 Invalid input type selected (channel 0) X402 010 0 0000 0010 Invalid input type selected (channel 1) X403 010 0 0000 0011 Invalid input type selected (channel 2) X404 010 0 0000 0100 Invalid input type selected (channel 3) X405 010 0 0000 0101 Invalid input type selected (channel 4) X406 010 0 0000 0110 Invalid input type selected (channel 5) X407 010 0 0000 0111 Invalid input filter selected (channel 0) X408 010 0 0000 1000 Invalid input filter selected (channel 1) X409 010 0 0000 1001 Invalid input filter selected (channel 2) X40A 010 0 0000 1010 Invalid input filter selected (channel 3) X40B 010 0 0000 1011 Invalid input filter selected (channel 4) X40C 010 0 0000 1100 Invalid input filter selected (channel 5) X40D 010 0 0000 1101 Invalid input format selected (channel 0) X40E 010 0 0000 1110 Invalid input format selected (channel 1) X40F 010 0 0000 1111 Invalid input format selected (channel 2) X410 010 0 0001 0000 Invalid input format selected (channel 3) X411 010 0 0001 0001 Invalid input format selected (channel 4) X412 010 0 0001 0010 Invalid input format selected (channel 5) X413 010 0 0001 0011 An unused bit has been set for channel 0 X414 010 0 0001 0100 An unused bit has been set for channel 1 X415 010 0 0001 0101 An unused bit has been set for channel 2 X416 010 0 0001 0110 An unused bit has been set for channel 3 X417 010 0 0001 0111 An unused bit has been set for channel 4 X418 010 0 0001 1000 An unused bit has been set for channel 5 X419 010 0 0001 1001 Invalid module-configuration register

Module

(1)

Error Code

Binary Binary

Extended Error Information Code

Error Description

(1) X represents the ‘Don’t Care’ digit.

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Chapter 5 Diagnostics and Troubleshooting

Module Inhibit Function

Contacting Rockwell Automation

Some controllers support the module inhibit function. See your controller manual for details.

Whenever the 1769-IT6 module is inhibited, the module continues to provide information about changes at its inputs to the 1769 CompactBus master (for example, a CompactLogix controller).

If you need to contact Rockwell Automation for assistance, please have the following information available when you call:

• A clear statement of the anomaly, including a description of what the system is actually doing. Note the status indicator state; also note data and configuration words for the module.

• A list of remedies you have already tried.

• Processor type and firmware number (see the label on the processor).

• Hardware types in the system, including all I/O modules.

• Fault code, if the processor is faulted.

82 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Appendix

Specifications

Table 12 - General Specifications - 1769-IT6

Attribute 1769-IT6

Dimensions (HxDxW), approx. 118 x 87 x 35 mm (4.65 x 3.43 x 1.38 in.)

height including mounting tabs is 138 mm (5.43 in.) Shipping weight (with carton), approx. 276 g (0.61 lb) Storage temperature -40…85 °C (-40…185 °F) Operating temperature 0…60 °C (32…140 °F) Operating humidity 5…95% noncondensing Operating altitude 2000 m (6561 ft) Vibration, operating 10…500 Hz, 5 g, 0.030 in. peak-to-peak Vibration, relay operation 2 g Shock, operating 30 g, 11 ms panel mounted

(20 g, 11 ms DIN rail mounted) Shock, relay operation 7.5 g panel mounted (5 g DIN rail mounted) Shock, nonoperating 40 g panel mounted (30 g DIN rail mounted) System power-supply distance rating 8 (The module may not be more than 7 modules away

from a system power supply.) Recommended cable Belden 8761 (shielded) for millivolt inputs

Shielded thermocouple extension wire for the specific

type of thermocouple you are using. Follow

thermocouple manufacturer’s recommendations. Agency certification C-UL certified (under CSA C22.2 No. 142)

UL 508 listed

CE compliant for all applicable directives Hazardous environment class Class I, Division 2, Hazardous Location, Groups A, B, C, D

(UL 1604, C-UL under CSA C22.2 No. 213) Radiated and conducted emissions EN50081-2 Class A

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Appendix A Specifications

Table 12 - General Specifications - 1769-IT6

Attribute 1769-IT6

Electrical /EMC The module has passed testing at the following levels. ESD immunity (IEC61000-4-2) 4 kV contact, 8 kV air, 4 kV indirect Radiated immunity (IEC61000-4-3) 10 V/m , 80…1000 MHz, 80% amplitude modulation,

900 MHz keyed carrier

Fast transient burst (IEC61000-4-4) 2 kV, 5 kHz Surge immunity (IEC61000-4-5) 1kV galvanic gun Conducted immunity (IEC61000-4-6)

(1)

Conducted immunity frequency range may be 150 kHz…30 MHz if the radiated immunity frequency range is 30…1000 MHz.

(2)

For grounded thermocouples, the 10V level is reduced to 3V.

10V, 0.15 to 80MHz

(1) (2)

Table 13 - Input Specifications - 1769-IT6

Attribute 1769-IT6

Number of inputs 6 input channels plus 2 CJC sensors Bus current draw, max 100 mA at 5V DC

Heat dissipation 1.5 total W (The Watts per point, plus the minimum Watts,

Converter type Delta Sigma Response speed per channel Input filter and configuration dependent. See

Rated working voltage Common mode voltage range

(1)

(2)

Common mode rejection 115 dB (min) at 50 Hz (with 10 Hz or 50 Hz filter)

Normal mode rejection ratio 85 dB (min) at 50 Hz (with 10 Hz or 50 Hz filter)

Cable impedance, max 25 W (for specified accuracy) Input impedance >10 MW Open-circuit detection time

Calibration The module performs autocalibration upon powerup and

Non-linearity (in percent full scale) ±0.03% Module error over full temperature range

(0…60 °C (32…140 °F)) CJC sensor accuracy ±0.3 °C (±0.54 °F) CJC accuracy ±1.0 °C (±1.8 °F) Overload at input terminals, max

Input group to bus isolation 720V DC for 1 min (qualification test)

Input channel configuration Via configuration software or the user program (by writing

40 mA at 24V DC

with all points energized.)

Effects of

Filter Frequency on Channel Step Response on page 47.

30V AC/30V DC ±10V max per channel

115 dB (min) at 60 Hz (with 10 Hz or 60 Hz filter)

85 dB (min) at 60 Hz (with 10 Hz or 60 Hz filter)

7 ms to 2.1s

(3)

whenever a channel is enabled. You can also program the module to calibrate every five minutes.

See page 86

±35V DC continuous

(4)

30V AC/30V DC working voltage

a unique bit pattern into the module’s configuration file). Refer to your controller’s user manual to determine if user program configuration is supported.

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Specifications Appendix A

Table 13 - Input Specifications - 1769-IT6

Attribute 1769-IT6

Module OK status indicator On: module has power, has passed internal diagnostics,

Channel diagnostics Over- or under-range and open-circuit by bit reporting Vendor I.D. code 1 Product type code 10 Product code 36

(1)

Rated working voltage is the maximum continuous voltage that can be applied at the input terminal, including the input signal and the value that floats above ground potential (for example, 30V DC input signal and 20V DC potential above ground).

(2)

For proper operation, both the plus and minus input terminals must be within ±10V DC of analog common.

(3)

Open-circuit detection time is equal to the module scan time, which is based on the number of enabled channels, and the filter frequency of each channel.

(4)

Maximum current input is limited due to input impedance.

Table 14 - Repeatability at 25 °C (77 °F)

Input Type Repeatability for 10 Hz

Thermocouple J ±0.1 °C (±0.18 °F) Thermocouple N (-110…1300 °C (-166…2372 °F)) ±0.1 °C (±0.18 °F) Thermocouple N (-210…-110 °C (-346…-166 °F)) ±0.25 °C (±0.45 °F) Thermocouple T (-170…400 °C (-274…752 °F)) ±0 .1 °C (±0.18 °F) Thermocouple T (-270…-170 °C (-454…-274 °F)) ±1.5 °C (±2.7 °F) Thermocouple K (-270…1370 °C (-454…2498 °F)) ±0.1 °C (±0.18 °F) Thermocouple (-270…-170 °C (-454…-274 °F)) ±2.0 °C (±3.6 °F) Thermocouple E (-220…1000 °C (-364…1832 °F)) ±0.1 °C (±0.18 °F) Thermocouple E (-270…-220 °C (-454…-364 °F)) ±1.0 °C (±1.8 °F) Thermocouples S and R ±0.4 °C (±0.72 °F) Thermocouple C ±0.7 °C (±1.26 °F) Thermocouple B ±0.2 °C (±0.36 °F) ±50 mV ±6 µV ±100 mV ±6 µV

(1)

Repeatability is the ability of the input module to register the same reading in successive measurements for the same input signal.

(2)

Repeatability at any other temperature in the 0…60 °C (32…140 °F) range is the same as long as the temperature is stable.

and is communicating over the bus. Off: Any of the above is not true.

(1) (2)

Filter

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Appendix A Specifications

Table 15 - Accuracy

Input Type

(1)

Thermocouple J (-210…1200 °C (-346…2192 °F)) ±0.6 °C (± 1.1 °F) ±0.9 °C (± 1.7 °F) ±0.0218 °C/°C (±0.0218 °F/°F) Thermocouple N (-200…1300 °C (-328…2372 °F)) ±1 °C (± 1.8 °F) ±1.5 °C (±2.7 °F) ±0.0367 °C/°C (±0.0367 °F/°F) Thermocouple N (-210…-200 °C (-346…-328 °F)) ±1.2 °C (±2.2 °F) ±1.8 °C (±3.3 °F) ±0.0424 °C/°C (±0.0424 °F/°F) Thermocouple T (-230…400 °C (-382…752 °F)) ±1 °C (± 1.8 °F) ±1.5 °C (±2.7 °F) ±0.0349 °C/°C (±0.0349 °F/°F) Thermocouple T (-270…-230 °C (-454…-382 °F)) ±5.4 °C (± 9.8 °F) ±7.0 °C (±12.6 °F) ±0.3500 °C/°C (±0.3500 °F/°F) Thermocouple K (-230…1370 °C (-382…2498 °F)) ±1 °C (± 1.8 °F) ±1.5 °C (±2.7 °F) ±0.4995 °C/°C (±0.4995 °F/°F) Thermocouple K (-270…-225 °C (-454…-373 °F)) ±7.5 °C (± 13.5 °F) ±10 °C (±18 °F) ±0.0378 °C/°C (±0.0378 °F/°F) Thermocouple E (-210…1000 °C (-346…1832 °F)) ±0.5 °C (± 0.9 °F) ±0.8 °C (±1.5 °F) ±0.0199 °C/°C (±0.0199 °F/°F) Thermocouple E (-270…-210 °C (-454…-346 °F)) ±4.2 °C (± 7.6 °F) ±6.3 °C (±11.4 °F) ±0.2698 °C/°C (±0.2698 °F/°F) Thermocouple R ±1.7 °C (± 3.1 °F) ±2.6 °C (± 4.7 °F) ±0.0613 °C/°C (±0.0613 °F/°F) Thermocouple S ±1.7 °C (± 3.1 °F) ±2.6 °C (± 4.7 °F) ±0.0600 °C/°C (±0.0600 °F/°F) Thermocouple C ±1.8 °C (±3.3 °F) ±3.5 °C (±6.3 °F) ±0.0899 °C/°C (±0.0899 °F/°F) Thermocouple B ±3.0 °C (±5.4 °F) ±4.5 °C (±8.1°F) ±0.1009 °C/°C (±0.1009 °F/°F) ±50 mV ±15 µV ±25 µV ±0.44 µV/°C (±0.80 µV/°F) ±100 mV ±20 µV ±30 µV ±0.69 µV/°C (±01.25 µV/°F)

(1)

The module uses the National Institute of Standards and Technology (NIST) ITS-90 standard for thermocouple linearization.

(2)

Accuracy and temperature drift information does not include the affects of errors or drift in the cold junction compensation circuit.

(3)

Accuracy is dependent upon the analog/digital converter output rate selection, data format, and input noise.

(4)

Temperature drift with autocalibration is slightly better than without autocalibration.

With Autocalibration Enabled Without Autocalibration Accuracy

(2) (3)

for 10 Hz, 50 Hz, and 60 Hz

Temperature Drift, max

Filters, max At 25 °C (77 °F)

Ambient

At 0…60 °C (32…140 °F)

At 0…60 °C (32…140 °F) Ambient

Ambient

(2) (4)

TIP

For more detailed accuracy and drift information, see the accuracy graphs on page 87

page 105

through page 109.

through page 104 and the temperature drift graphs on

86 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Specifications Appendix A

Accuracy versus Thermocouple Temperature and Filter Frequency

The following graphs show the module’s accuracy when operating at 25 °C (77 °F) for each thermocouple type over the thermocouple’s temperature range for each frequency. The effect of errors in cold junction compensation is not included.

Figure 23 - Module Accuracy at 25 °C (77 °F) Ambient for Type B Thermocouple Using 10, 50, and 60 Hz Filter

3.0

2.5

2.0

1.5

Accuracy °C

1.0

10 Hz 50 Hz 60 Hz

0.5

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Thermocouple Temperature °C

Accuracy °F

500 1000 1500 2000 2500 3000 3500

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

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Appendix A Specifications

Figure 24 - Module Accuracy at 25 °C (77 °F) Ambient for Type B Thermocouple Using 250, 500, and 1 kHz Filter

100

90 80 70 60 50 40

Accuracy °C

30 20 10

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

200 180 160 140 120 100

Accuracy °F

80 60 40 20

500 1000 1500 2000 2500 3000 3500

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

88 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Accuracy °C

Specifications Appendix A

Figure 25 - Module Accuracy at 25 °C (77 °F) Ambient for Type C Thermocouple Using 10, 50, and 60 Hz Filter

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2 0

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Thermocouple Temperature °C

10 Hz 50 Hz 60 Hz

3.5

2.5

1.5

Accuracy °F

0.5

0 500 1000 1500 2000 2500 3000 3500 4000 4500

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 89

Appendix A Specifications

Accuracy °C

Figure 26 - Module Accuracy at 25 °C (77 °F) Ambient for Type C Thermocouple Using 250, 500, and 1 kHz Filter

45 40 35 30 25 20 15 10

5 0

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

Accuracy °F

0 500 1000 1500 2000 2500 3000 3500 4000 4500

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

90 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Figure 27 - Module Accuracy at 25 °C (77 °F) Ambient for Type E Thermocouple Using 10, 50, and 60 Hz Filter

4.5

4.0

3.5

3.0

2.5

2.0

Accuracy °C

1.5

1.0

0.5

-400 -200 0 200 400 600 800 1000

Thermocouple Temperature °C

Specifications Appendix A

10 Hz 50 Hz 60 Hz

Accuracy °F

-500 0 500 1000 1500 2000

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 91

Appendix A Specifications

Figure 28 - Module Accuracy at 25 °C (77 °F) Ambient for Type E Thermocouple Using 250, 500, and 1 kHz Filter

Accuracy °C

-400 -200 0 200 400 600 800 1000

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

100

90 80 70 60 50

Accuracy °F

40 30 20 10

-500 0 500 1000 1500 2000

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

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Specifications Appendix A

Figure 29 - Module Accuracy at 25 °C (77 °F) Ambient for Type J Thermocouple Using 10, 50, and 60 Hz Filter

0.6

0.5

0.4

0.3

Accuracy °C

0.2

0.1

-400 -200 0 200 400 600 800 1000 1200

Thermocouple Temperature °C

10 Hz 50 Hz 60 Hz

1.0

0.9

0.8

0.7

0.6

0.5

Accuracy °F

0.4

0.3

0.2

0.1 0

-400 0 400 800 1200 1600 2000

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 93

Appendix A Specifications

Figure 30 - Module Accuracy at 25 °C (77 °F) Ambient for Type J Thermocouple Using 250, 500, and 1 kHz Filter

Accuracy °C

-400 -200 0 200 400 600 800 1000 1200

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

Accuracy °F

-400 0 400 800 1200 1600 2000

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

94 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Specifications Appendix A

Figure 31 - Module Accuracy at 25 °C (77 °F) Ambient for Type K Thermocouple Using 10, 50, and 60 Hz Filter

Accuracy °C

-400 -200 0 200 400 600 800 1000 1200 1400

Thermocouple Temperature °C

Accuracy °F

10 Hz 50 Hz 60 Hz

-500 0 500 1000 1500 2000 2500

Thermocouple Temperature °F

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 95

Appendix A Specifications

Figure 32 - Module Accuracy at 25 °C (77 °F) Ambient for Type K Thermocouple Using 250, 500, and 1 kHz Filter

Accuracy °C

-400 -200 0 200 400 600 800 1000 1200 1400

Thermocouple Temperature °C

140

120

100

Accuracy °F

250 Hz 500 Hz 1 kHz

-500 0 500 1000 1500 2000 2500

Thermocouple Temperature °F

96 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Figure 33 - Module Accuracy at 25 °C (77 °F) Ambient for Type N Thermocouple Using 10, 50, and 60 Hz Filter

1.2

1.0

0.8

0.6

0.4

Accuracy °C

0.2

-400 -200 0 200 400 600 800 1000 1200 1400

Thermocouple Temperature °C

Specifications Appendix A

10 Hz 50 Hz 60 Hz

2.2

2.0

1.8

1.6

1.4

1.2

1.0

Accuracy °F

0.8

0.6

0.4

0.2 0

-400 0 400 800 1200 1600 2000 2400

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 97

Appendix A Specifications

Figure 34 - Module Accuracy at 25 °C (77 °F) Ambient for Type N Thermocouple Using 250, 500, and 1 kHz Filter

Accuracy °C

-400 -200 0 200 400 600 800 1000 1200 1400

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

100

90 80 70 60 50

Accuracy °F

40 30 20 10

-400 0 400 800 1200 1600 2000 2400

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

98 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Figure 35 - Module Accuracy at 25 °C (77 °F) Ambient for Type R Thermocouple Using 10, 50, and 60 Hz Filter

1.8

1.6

1.4

1.2

1.0

0.8

Accuracy °C

0.6

0.4

0.2

0 200 400 600 800 1000 1200 1400 1600 1800

Thermocouple Temperature °C

Specifications Appendix A

10 Hz 50 Hz 60 Hz

3.5

2.5

Accuracy °F

1.5

0.5

0 500 1000 1500 2000 2500 3000

Thermocouple Temperature °F

10 Hz 50 Hz 60 Hz

Rockwell Automation Publication 1769-UM004B-EN-P - March 2010 99

Appendix A Specifications

Figure 36 - Module Accuracy at 25 °C (77 °F) Ambient for Type R Thermocouple Using 250, 500, and 1 kHz Filter

Accuracy °C

0 200 400 600 800 1000 1200 1400 1600 1800

Thermocouple Temperature °C

250 Hz 500 Hz 1 kHz

120

100

Accuracy °F

0 500 1000 1500 2000 2500 3000

Thermocouple Temperature °F

250 Hz 500 Hz 1 kHz

100 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010

Rockwell Automation 1769-IT6 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Summary of Changes

Table of Contents

Who Should Use This Manual

Additional Resources

Conventions Used in This Manual

Overview

General Description

Thermocouple/mV Inputs and Ranges

Data Formats

Filter Frequencies

Hardware Features

General Diagnostic Features

System Overview

System Operation

Module Operation

Module Field Calibration

Quick Start for Experienced Users

Before You Begin

Required Tools and Equipment

What You Need to Do

Installation and Wiring

Compliance to European Union Directives

EMC Directive

Low Voltage Directive

Power Requirements

General Considerations

Hazardous Location Considerations

Preventing Electrostatic Discharge

Removing Power

Selecting a Location

System Assembly

Mounting

Minimum Spacing

Panel Mounting

DIN Rail Mounting

Replace a Single Module within a System

Field Wiring Connections

System Wiring Guidelines

Terminal Door Label

Removing and Replacing the Terminal Block

Wire the Finger-safe Terminal Block

Wire the Module

Cold Junction Compensation

Calibration

Module Data, Status, and Channel Configuration

Module Memory Map

Accessing Input Image File Data

Input Data File

Input Data Values

General Status Bits (S0 through S7)

Open-circuit Flag Bits (OC0 through OC7)

Over-range Flag Bits (O0 through O7)

Under-range Flag Bits (U0 through U7)

Configuring Channels

Configuration Data File

Channel Configuration

Enabling or Disabling a Channel (bit 15)

Selecting Data Formats (bits 14…12)

Selecting Input Type (bits 11…8)

Selecting Temperature Units (bit 7)

Determining Open-circuit Response (bits 6 and 5)

Selecting Input Filter Frequency (bits 2…0)

Selecting Enable/Disable Cyclic Calibration (word 6, bit 0)

Determining Effective Resolution and Range

Determining Module Update Time

Effects of Autocalibration on Module Update Time

Calculating Module Update Time

Impact of Autocalibration on Module Startup During Mode Change

Diagnostics and Troubleshooting

Safety Considerations

Indicator Lights

Stand Clear of Equipment

Program Alteration

Safety Circuits

Module Operation versus Channel Operation

Power-up Diagnostics