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:
In 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
g
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
T 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
T 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
T ransfer Read W ord Assignments for the Incremental Encoder
Module (1794-ID2) 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block
T 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