Allen-Bradley FLEX I/O 1794-ID2 User manual

User

Manual

FLEX I/O 2 Input

Incremental

Encoder Module

(Cat. No. 1794-ID2)

Allen-Bradley

Allen-Bradley Motors

Because of the variety of uses for the products described in this

publication, those responsible for the application and use of this control

equipment must satisfy themselves that all necessary steps have been

taken to assure that each application and use meets all performance and

safety requirements, including any applicable laws, regulations, codes

and standards.

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

this guide are intended solely for example. Since there are many

variables and requirements associated with any particular installation,

Allen-Bradley does not assume responsibility or liability (to include

intellectual property liability) for actual use based upon the examples

shown in this publication.

Allen-Bradley publication SGI–1.1, “Safety Guidelines For The

Application, Installation and Maintenance of Solid State Control”

(available from your local Allen-Bradley office) describes some

important differences between solid-state equipment and

electromechanical devices which should be taken into consideration

when applying products such as those described in this publication.

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

in part, without written permission of Allen–Bradley Company, Inc.

is prohibited.

Throughout this manual we make notes to alert you to possible injury to

people or damage to equipment under specific circumstances.

!ATTENTION: Identifies information about practices or

circumstances that can lead to personal injury or death,

property damage, or economic loss.

Attention helps you:

•identify a hazard

•avoid the hazard

•recognize the consequences

Important: Identifies information that is especially important for

successful application and understanding of the product.

Important: We recommend you frequently backup your application

programs on appropriate storage medium to avoid possible

data loss.

DeviceNet, DeviceNetManager, and RediSTATION are trademarks of Allen-Bradley Company, Inc.

PLC, PLC–2, PLC–3, and PLC–5 are registered trademarks of Allen-Bradley Company, Inc.

Windows is a trademark of Microsoft.

Microsoft is a registered trademark of Microsoft

IBM is a registered trademark of International Business Machines, Incorporated.

All other brand and product names are trademarks or registered trademarks of their respective companies.

Important User Information



Publication

1794-6.5.15 – December 1998



This manual shows you how to use your FLEX I/O pulse counter

module with Allen-Bradley programmable controllers. The manual

helps you install, program and troubleshoot your module.

You must be able to program and operate an Allen-Bradley

programmable controller to make efficient use of your FLEX I/O

module. In particular, you must know how to program block

transfers.

We assume that you know how to do this in this manual. If you do

not, refer to the appropriate programming and operations manual

before you attempt to program your modules.

In this manual, we refer to:

–the pulse counter module as the “input module”

–the Programmable Controller as the “controller”

This manual is divided into eight chapters. The following chart lists

each chapter with its corresponding title and a brief overview of the

topics covered in that chapter.

Chapter Title Contents

1Overview of FLEX I/O and the

Pulse Counter Module Describes FLEX I/O pulse counter modules, features, and

how they function

2How to Install Your Pulse Counter

Module How to install and wire the module

3Module Programming Explains block transfer programming, sample programs

4Writing Configuration to and

Reading Status From with a

Remote I/O Adapter

Explains how to configure your modules and read status

information from your modules when using a remote I/O

adapter

5How Communication Takes Place

and I/O Image Table Mapping

with the DeviceNet Adapter

Explains how you communicate with your modules, and

how the I/O image is mapped when using a DeviceNet

adapter

6Input, Output and Configuration

files for Analog Modules using

ControlNet

Explains how you communicate with your modules, and

how the I/O and configuration files are mapped when using

a ControlNet adapter

7Calibrating Your Pulse Counter

Module How to calibrate the module.

8Troubleshoot Your Pulse Counter

Module How to use the indicators to troubleshoot your module.

Purpose of this Manual

Audience

Vocabulary

Manual Organization

Allen-Bradley Motors

Using This ManualP–2

Publication

1794-6.5.15 – December 1998

Appendix Title Contents

ASpecifications Specifications for the pulse counter module

We use these conventions in this manual:

this manual, we show: Like this:

that there is more information about a topic

in another chapter in this manual

that there is more information about the

topic in another manual More

For additional information on FLEX I/O systems and modules, refer

to the following documents:

Catalo

Volta e

Descr pt on

Publications

Catalo

Number Voltage Description Installation

Instructions User

Manual

1794 1794 FLEX I/O Product Data 1794-2.1

1794-ACN 24V dc ControlNet Adapter 1794-5.8

1794-ACNR 24V dc Redundant Media ControlNet Adapter 1794-5.18

1794-ACN15 24V dc ControlNet Adapter 1794-5.47

1794-ACNR15 24V dc Redundant Media ControlNet Adapter 1794-5.48

1794-ADN 24V dc DeviceNet Adapter 1794-5.14 1794-6.5.5

1794-ASB/C 24V dc Remote I/O Adapter 1794-5.50 1794-6.5.9

1794-ASB2/B 24V dc 2-Slot Remote I/O Adapter 1794-5.44 1794-6.5.13

1794-APB 24V dc Profibus Adapter 1794-5.40 1794-6.5.6

1794-IB8 24V dc 8 Sink Input Module 1794-5.30

1794-OB8 24V dc 8 Source Output Module 1794-5.31

1794-IB16 24V dc 16 Sink Input Module 1794-5.4

1794-OB16 24V dc 16 Source Output Module 1794-5.3

1794-IV16 24V dc 16 Source Input Module 1794-5.28

1794-OV16 24V dc 16 Sink Output Module 1794-5.29

1794-OB8EP 24V dc 8 Electronically Fused Output Module 1794-5.20

1794-IB8S 24V dc Sensor Input Module 1794-5.7

1794-IB10XOB6 24V dc 10 Input/6 Output Module 1794-5.24

1794-IE8 24V dc Selectable Analog 8 Input Module 1794-5.6

1794-6.5.2

1794-OE4 24V dc Selectable Analog 4 Output Module 1794-5.5

1794-6.5.2

Table continued on next page

Conventions

For Additional Information

Using This Manual P–3

Publication

1794-6.5.15 – December 1998

Publications

DescriptionVoltage

Catalog

Number User

Manual

Installation

Instructions

DescriptionVoltage

Catalog

Number

1794-IE4XOE2 24V dc 4 Input/2 Output Analog Module 1794-5.15 1794-6.5.2

1794-OF4 24V dc 4 Output Isolated Analog Module 1794-5.37

1794-IF4 24V dc 4 Input Isolated Analog Module 1794-5.38 1794-6.5.8

1794-IF2XOF2 24V dc 2 Input/2 Output Isolated Analog Module 1794-5.39

1794-IR8 24V dc 8 RTD Input Analog Module 1794-5.22 1794-6.5.4

1794-IT8 24V dc 8 Thermocouple Input Module 1794-5.21 1794-6.5.7

1794-IRT8 24V dc 8 Thermocouple/RTD Input Module 1794-5.50 1794-6.5.12

1794-IJ2 24V dc 2 Frequency Input Module 1794-5.49 1794-6.5.11

1794-IA8 120V ac 8 Input Module 1794-5.9

1794-OA8 120V ac Output Module 1794-5.10

1794-TB2

1794-TB3 2-wire Terminal Base

3-wire Terminal Base 1794-5.2

1794-TBN Terminal Base Unit 1794-5.16

1794-TBNF Fused Terminal Base Unit 1794-5.17

1794-TB3T Temperature Terminal Base Unit 1794-5.41

1794-TB3S Spring Clamp Terminal Base Unit 1794-5.42

1794-TB3TS Spring Clamp Temperature Base Unit 1794-5.43

1794-TB3G Terminal Base Unit 1794-5.51

1794-TB3GS Spring Clamp Terminal Base Unit 1794-5.59

1794-CE1, -CE3 Extender Cables 1794-5.12

1794-NM1 Mounting Kit 1794-2.13

1794-PS1 24V dc Power Supply 1794-5.35

This preface gave you information on how to use this manual

efficiently. The next chapter introduces you to the frequency

module.

Summary

Allen-Bradley Motors

Using This ManualP–4

Publication

1794-6.5.15 – December 1998

Publication 1794-6.5.15 – December 1998

Chapter 1

What

This Chapter Contains

1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Y

ou Use the Incremental Encoder Module

1–1. . . . . . . . . . . . . . .

What

the Incremental Encoder Module Does

1–2. . . . . . . . . . . . . . . . .

Typical

Applications

1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input

Capabilities

1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How

the Incremental Encoder Operates

1–4. . . . . . . . . . . . . . . . . . . . .

Variables 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start

Counting

1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting

the incremental encoder and up/down counting

1–4. . . . . .

Up/Down

Counting Controlled by B Input

1–5. . . . . . . . . . . . . . . . . .

Up/Down

Counting using Pulses at Inputs A and B

1–5. . . . . . . . . . .

Count Pulses from Incremental Encoders 1–6. . . . . . . . . . . . . . . . .

Preset

Function

1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gate

Function

1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Store

Function

1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Limitation

Function

1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter Summary 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

What

This Chapter Contains

2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Before Y

ou Install Y

our Input Module

2–1. . . . . . . . . . . . . . . . . . . . . . .

European

Union Directive Compliance

2–1. . . . . . . . . . . . . . . . . . . . . .

EMC Directive 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low V

oltage Directive

2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Requirements 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring

the T

erminal Base Units (1794-TB3G shown) 2–3. . . . . . . .

Installing

the Module

2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting

the T

erminal Base Unit on a DIN Rail

2–4. . . . . . . . . . . . .

Panel/Wall

Mounting

2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting

the Incremental Encoder Module on the T

erminal

Base Unit

2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting

Wiring for Y

our incremental encoder Module

2–9. . . . . . . . .

Wiring

to a 1794-TBN or -TBNF T

erminal Base Unit

2–11. . . . . . . . . .

Wiring

connections for the 1794–ID2 incremental encoder Module

2–12

Example of Pulse T

ransmitter Wiring

2–13. . . . . . . . . . . . . . . . . . . . .

Example

of Incremental Encoder Wiring

2–13. . . . . . . . . . . . . . . . . .

Module

Indicators

2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter Summary 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Overview of the Incremental

Encoder Module

How to Install Your

Incremental Encoder Module

Allen-Bradley Motors

Table of Contentsii

Publication

1794-6.5.15 – December 1998

Chapter 3

What

This Chapter Contains

3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enter Block Transfer Instructions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . .

PLC-2 Family Processor 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PLC-5 Family Processor 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SLC-5 Programming 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter Summary 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4

What

This Chapter Contains

4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ConfiguringY

our Incremental Encoder Module

4–1. . . . . . . . . . . . . . . .

Reading Data From Y

our Module

4–2. . . . . . . . . . . . . . . . . . . . . . . . .

Mapping

Data for the Module

4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Incremental

Encoder Module (1794-ID2) Image T

able Mapping

4–2. .

Block

ransfer Read W

ord Assignments for the Incremental Encoder

Module (1794-ID2)

4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit/Word

Definitions for Block T

ransfer Read W

ords for the

Incremental Encoder Module

4–3. . . . . . . . . . . . . . . . . . . . . .

Block

ransfer W

rite W

ord Assignments for the Incremental Encoder

Module 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit/Word

Definitions for the Block T

ransfer W

rite W

ords for the

Incremental Encoder Module

4–5. . . . . . . . . . . . . . . . . . . . . .

Chapter Summary 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5

What

This Chapter Contains

5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About DeviceNetManager Software 5–1. . . . . . . . . . . . . . . . . . . . . . . .

Polled I/O Structure 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adapter

Input Status W

ord 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

System

Throughput

5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mapping

Data into the Image T

able 5–3. . . . . . . . . . . . . . . . . . . . . . . .

Incremental

Encoder Module (1794-ID2) Image T

able Mapping

5–3. .

Block

ransfer Read W

ord Assignments for the Incremental Encoder

Module (1794-ID2)

5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Block

ransfer W

rite W

ord Assignments for the Incremental Encoder

Module (1794-ID2)

5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bit/Word

Definitions for the incremental encoder Module

(1794–ID2) 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Defaults 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Programming Your

Incremental Encoder Module

Writing Configuration to and

Reading Status from Your

Module with a Remote I/O

Adapter

How Communication Takes

Place and I/O Image Table

Mapping with the DeviceNet

Adapter

Table of Contents iii

Publication

1794-6.5.15 – December 1998

Chapter 6

Chapter Objectives 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About

the ControlNet Adapter

6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scheduled

Data-T

ransfer 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unscheduled

Data-T

ransfer 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Module

I/O Mapping

6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O

Structure

6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adapter

Input Status W

ord 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safe

State Data

6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Device Actions 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Communication

Fault Behavior

6–5. . . . . . . . . . . . . . . . . . . . . . . . .

Idle

State Behavior

6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input

Data Behavior upon Module Removal

6–5. . . . . . . . . . . . . . . .

Incremental

Encoder Module (1794-ID2) Image T

able Mapping

6–6. .

Bit/Word

Definitions for Block T

ransfer Read W

ords for the

Pulse Counter Module

6–6. . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 7

Chapter Objective 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CalibratingY

our Module

7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration

Method 1

7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration

Method 2

7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 8

What

This Chapter Contains

8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status

Indicators

8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What’s Next 8–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix A

Specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input, Output and

Configuration Files for

Analog Modules when used

with ControlNet

Calibrating Your Incremental

Encoder Module

Troubleshoot the

Incremental Encoder Module

Specifications

Allen-Bradley Motors

Table of Contentsiv

Publication

1794-6.5.15 – December 1998

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