Allen-Bradley micrologix 1500 User manual

MicroLogix™ 1500
Programmable
Controllers
(Bulletin 1764)
User Manual
AB Spares

Important User
Information
Because of the variety of uses for the products described in this publication, those
responsible for the application and use of this control equipment must satisfy
themselves that all necessary steps have been taken to assure that each application
and use meets all performance and safety requirements, including any applicable
laws, regulations, codes and standards.
The illustrations, charts, sample programs and layout examples shown in this
guide are intended solely for purposes of example. Since there are many variables
and requirements associated with any particular installation, Rockwell
International Corporation does not assume responsibility or liability (to include
intellectual property liability) for actual use based upon the examples shown in
this publication.
Rockwell Automation publication SGI-1.1, Safety Guidelines for the Application,
Installation and Maintenance of Solid-State Control (available from your local
Rockwell Automation office), describes some important differences between
solid-state equipment and electromechanical devices that should be taken into
consideration when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole or part,
without written permission of Rockwell Automation, is prohibited.
Throughout this manual we use notes to make you aware of safety considerations:
Attention statements help you to:
•identify a hazard
•avoid a hazard
•recognize the consequences
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ATTENTION
!
Identifies information about practices or circumstances that
can lead to personal injury or death, property damage or
economic loss
IMPORTANT Identifies information that is critical for successful
application and understanding of the product.

P-1 Publication1762-RM001A-US-P
Preface
Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:
•who should use this manual
•the purpose of this manual
•related documentation
•conventions used in this manual
•Rockwell Automation support
Who Should Use this
Manual
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use MicroLogix 1500 controllers.
You should have a basic understanding of electrical circuitry and familiarity with
relay logic. If you do not, obtain the proper training before using this product.
Purpose of this Manual
This manual is a reference guide for MicroLogix 1500 controllers. It describes the
procedures you use to install, wire, and troubleshoot your controller. This manual:
•explains how to install and wire your controllers
•gives you an overview of the MicroLogix 1500 controller system
Refer to publication 1762-RM001B-US-P, MicroLogix 1200 and MicroLogix 1500
Programmable Controllers Instruction Set Reference Manual for the MicroLogix 1200
and 1500 instruction set and for application examples to show the instruction set
in use. Refer to your programming software user documentation for more
information on programming your MicroLogix 1500 controller.
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Preface P-2
Related Documentation
The following documents contain additional information concerning Rockwell
Automation products. To obtain a copy, contact your local Rockwell Automation
office or distributor.
Common Techniques
Used in this Manual
The following conventions are used throughout this manual:
•Bulleted lists such as this one provide information, not procedural steps.
•Numbered lists provide sequential steps or hierarchical information.
•Italic type is used for emphasis.
For Read this Document Document Number
Information on understanding and applying micro controllers. MicroMentor 1761-MMB
Information on the MicroLogix 1500 Controllers instruction set MicroLogix 1200 and 1500
Programmable Controllers Instruction
Set Reference Manual
1762-RM001B-US-P
Information on mounting and wiring the MicroLogix 1500 Base Units,
including a mounting template for easy installation MicroLogix 1500 Programmable Controllers Base Unit Installation
Instructions
1764-IN001A-ML-P
A description on how to install and connect an AIC+. This manual also
contains information on network wiring. Advanced Interface Converter (AIC+) User Manual 1761-6.4
Information on how to install, configure, and commission a DNI DeviceNet™ Interface User Manual 1761-6.5
Information on DF1 open protocol. DF1 Protocol and Command Set
Reference Manual 1770-6.5.16
In-depth information on grounding and wiring Allen-Bradley
programmable controllers Allen-Bradley Programmable Controller Grounding and Wiring
Guidelines
1770-4.1
A description of important differences between solid-state
programmable controller products and hard-wired electromechanical
devices
Application Considerations for
Solid-State Controls SGI-1.1
An article on wire sizes and types for grounding electrical equipment National Electrical Code - Published by the National Fire
Protection Association of Boston, MA.
A complete listing of current documentation, including ordering
instructions. Also indicates whether the documents are available on
CD-ROM or in multi-languages.
Allen-Bradley Publication Index SD499
A glossary of industrial automation terms and abbreviations Allen-Bradley Industrial Automation
Glossary AG-7.1

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Preface P-3
Rockwell Automation
Support
Rockwell Automation offers support services worldwide, with over 75 Sales/
Support Offices, 512 authorized Distributors and 260 authorized Systems
Integrators located throughout the United States alone, plus Rockwell Automation
representatives in every major country in the world.
Local Product Support
Contact your local Rockwell Automation representative for:
•sales and order support
•product technical training
•warranty support
•support service agreements
Technical Product Assistance
If you need to contact Rockwell Automation for technical assistance, please review
the Troubleshooting appendix on page C-1 in this manual first. Then call your local
Rockwell Automation representative.
Your Questions or Comments on this Manual
If you find a problem with this manual, or you have any suggestions for how this
manual could be made more useful to you, please contact us at the address below:
Rockwell Automation
Control and Information Group
Technical Communication, Dept. A602V
P.O. Box 2086
Milwaukee, WI 53201-2086
or visit our internet page at:
http://www.ab.com/micrologix or http://www.rockwellautomation.com
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iPublication 1764-UM001A-US-P
Table of Contents
Chapter 1
Hardware Overview
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
MicroLogix 1500 Component Descriptions . . . . . . . . . . . . . . . . . . 1-2
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Compact™ Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Chapter 2
Installing Your Controller
Agency Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . 2-1
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Preventing Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Master Control Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Base Unit Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Controller Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Mounting the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Installing Controller Components. . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Chapter 3
Wiring Your Controller
Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Using Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Grounding the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Sinking and Sourcing Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Controller I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Chapter 4
Communication Connections
Default Communication Configuration . . . . . . . . . . . . . . . . . . . . . 4-1
Communications Toggle Push Button . . . . . . . . . . . . . . . . . . . . . . 4-2
Connecting to the RS-232 Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Connecting to a DH-485 Network . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Connecting to DeviceNet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Chapter 5
Using Trim Pots and the Data
Access Tool (DAT)
Trim Pot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Data Access Tool (DAT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Chapter 6
Using Real-Time Clock and
Memory Modules
Real-Time Clock Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Memory Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
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Appendix A
Specifications
Controller Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Controller Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Compact I/O Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Appendix B
Replacement Parts
MicroLogix 1500 Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . B-1
Lithium Battery (1747-BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Replacement Terminal Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Replacement Doors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Appendix C
Troubleshooting Your System
Understanding Controller LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Controller Error Recovery Model . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Identifying Controller Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Calling Rockwell Automation for Assistance. . . . . . . . . . . . . . . . . . C-5
Appendix D
Upgrading Your Operating
System
Preparing for Upgrade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Performing the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Missing/Corrupt OS LED Pattern . . . . . . . . . . . . . . . . . . . . . . . . D-2
Appendix E
Understanding
Communication Protocols
RS-232 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . E-1
DF1 Full-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
DF1 Half-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Using Modems with MicroLogix 1500 Programmable Controllers. E-7
DH-485 Communication Protocol. . . . . . . . . . . . . . . . . . . . . . . . . E-8
Modbus RTU Slave Communication Protocol
(MicroLogix 1764-LSP and 1764-LRP Series B processors only) . E-17
ASCII Protocol (MicroLogix 1500 1764-LSP and 1764-LRP
Series B Processors only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-18
Appendix F
System Loading and Heat
Dissipation
System Loading Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
Calculating Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9
Glossary
Index

1Publication 1764-UM001A-US-P
Chapter
1
Hardware Overview
Hardware Features
The MicroLogix 1500 programmable controller contains a power supply, input
circuits, output circuits, and a processor. The controller is available in 24 I/O and
28 I/O configurations.
The hardware features of the controller are:
Feature Description Feature Description
1 Removable Terminal Blocks 7 Memory Module/Real-Time Clock(1)
(1) Optional.
2 Interface to Expansion I/O,
Removable ESD Barrier 8Replacement Battery(1)
3 Input LEDs 9 Battery
4 Output LEDs 10 Terminal Doors and Label
5 Communication Port 11 Data Access Tool(1)
6 Status LEDs 12 Mode Switch, Trim Pots
RUN PROG
REM
12
3
4
5
6
7
1
8
9
10
11
12
10
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1-2 Hardware Overview
MicroLogix 1500
Component Descriptions
A controller is composed of a standard processor (1764-LSP or enhanced
1764-LRP with RS-232 port) and one of the base units listed below. The FET
transistor outputs are available on the 1764-28BXB base only.
Base Units
Processors
Processor (Catalog Number 1764-LSP)
Processor (Catalog Number 1764-LRP)
Catalog Number Base Unit I/O and Power Supply
1764-24AWA Twelve 120V ac inputs, twelve relay outputs and 120/240V ac power supply
1764-24BWA Twelve 24V dc inputs, twelve relay outputs and 120/240V ac power supply
1764-28BXB Sixteen 24V dc inputs, six FET and six relay outputs and 24V dc power supply
Communications Port
•DTE (male) 9-pin D-shell connector
•30V dc isolation