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Remote I/O Adapter
Module
Catalog Number 1747-ASB
User Manual
Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of these
products 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. In no event will Rockwell Automation be responsible or liable for indirect or consequential damage resulting from the use or application of these products.
Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Rockwell Automation 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 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 publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard:
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 |
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circumstances that can lead to personal injury or |
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!death, property damage, or economic loss.
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Identifies information that is critical for successful |
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IMPORTANT |
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application and understanding of the product. |
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Allen-Bradley is a trademark of Rockwell Automation
Summary of Changes
Summary of Changes
New Information
The information below summarizes the changes to this manual since the last printing as Publication 1747-6.13 - December 1996.
To help you find new information and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.
For This New Information |
See Page |
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Updated table of compatible scanners |
1-9 |
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Updated table of compatible RIO adapters |
1-9 |
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Updated list of compatible modules |
1-10 |
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Added primary/complementary chassis |
2-3 |
information for SW2 |
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Clarified DIP SW setting |
4-5 |
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C-Tick certification |
A-1 |
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Publication 1747-UM006B-EN-P - June 2003
2 Summary of Changes
Publication 1747-UM006B-EN-P - June 2003
Table of Contents
Preface |
Who Should Use this Manual- . . . . . . . . . . . . . . . . . . . . . . |
. . 1 |
|
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 1 |
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Contents of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . |
. 1 |
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Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . |
. 2 |
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Terms and Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 3 |
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Common Techniques Used in this Manual . . . . . . . . . . . . . . |
. 5 |
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Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . |
. 6 |
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Your Questions or Comments on this Manual . . . . . . . . . |
. 6 |
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Chapter 1 |
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Overview |
1747-ASB Module Overview . . . . . . . . . . . . . . . . . . . . . . . |
1-1 |
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Remote I/O Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-2 |
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How The Scanner Interacts With Adapters . . . . . . . . . . |
1-2 |
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Scanner I/O Image Division . . . . . . . . . . . . . . . . . . . . . |
1-4 |
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Crossing Logical Rack Boundaries. . . . . . . . . . . . . . . . . |
1-4 |
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Creating More Than One Logical Device by |
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Crossing a Logical Rack Boundary . . . . . . . . . . . . . . . |
1-5 |
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Transferring Data With RIO Discrete and Block Transfers 1-6 |
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RIO Discrete Transfer Example. . . . . . . . . . . . . . . . . . . |
1-7 |
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Physical and Logical RIO Link Specifications . . . . . . . . . |
1-8 |
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Extended Node Capability . . . . . . . . . . . . . . . . . . . . . . |
1-8 |
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Compatible RIO Scanners. . . . . . . . . . . . . . . . . . . . . . . |
1-9 |
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Compatible RIO Adapters . . . . . . . . . . . . . . . . . . . . . . . . . |
1-9 |
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Compatible Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-10 |
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1747-ASB Module Feature . . . . . . . . . . . . . . . . . . . . . . . . . |
1-10 |
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Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-11 |
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Status Display and LEDs. . . . . . . . . . . . . . . . . . . . . . . . |
1-11 |
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DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-11 |
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RIO Link and Processor Restart Lockout Connector . . . . |
1-13 |
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Door Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-13 |
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Self-Locking Tabs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-13 |
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Cable Tie Slots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-13 |
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Chapter 2 |
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Quick Start for Experienced Users |
Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . |
2-1 |
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Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-2 |
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SW1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-3 |
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SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-3 |
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SW3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-3 |
Publication 1747-UM006B-EN-P - June 2003
ii Table of Contents
Chapter 3
Addressing |
Chassis Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-1 |
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Slot Numbering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-2 |
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Addressing I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-2 |
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2-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-4 |
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2-Slot Addressing Considerations . . . . . . . . . . . . . . . . . |
3-5 |
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2-Slot Addressing Examples . . . . . . . . . . . . . . . . . . . . . |
3-6 |
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1-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-7 |
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1-Slot Addressing Considerations . . . . . . . . . . . . . . . . . |
3-8 |
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1-Slot Addressing Examples . . . . . . . . . . . . . . . . . . . . . |
3-9 |
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1/2-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-10 |
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1/2-Slot Addressing Considerations . . . . . . . . . . . . . . . . |
3-11 |
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1/2-Slot Addressing Examples. . . . . . . . . . . . . . . . . . . . |
3-12 |
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How I/O Module Images Are Mapped . . . . . . . . . . . . . . . . |
3-13 |
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How Discrete I/O Modules Are Mapped . . . . . . . . . . . . |
3-13 |
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How Specialty I/O Module Images Are Mapped . . . . . . |
3-14 |
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When Block Transfer Mode is Selected . . . . . . . . . . . . . |
3-14 |
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When Discrete Mode is Selected. . . . . . . . . . . . . . . . . . |
3-15 |
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Chapter 4 |
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Configuration |
DIP Switch Information . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-1 |
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DIP Switch SW1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-2 |
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Logical Group Number (SW1-7,8) . . . . . . . . . . . . . . . . . |
4-4 |
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DIP Switch SW2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-4 |
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Primary/Complementary Chassis (SW2-3) . . . . . . . . . . . |
4-5 |
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Reserved (SW2-4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-9 |
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Special Image and Chassis Size Considerations . . . . . . . . . . |
4-13 |
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Not Enough 1747-ASB Module Image to Map All of the |
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Available Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-13 |
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1747-ASB Image Size Exceeds Slot Requirements. . . . . . |
4-14 |
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One Slot of Pair is Present, and 1747-ASB Module Image is |
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Available for Both Slots . . . . . . . . . . . . . . . . . . . . . . . . |
4-14 |
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Both Slots Of A Pair Are Available But There Is Only Enough |
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1747-ASB Module Image Space Available For One Slot . 4-15 |
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DIP Switch SW3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-15 |
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Processor Restart Lockout (SW3-2) . . . . . . . . . . . . . . . . |
4-17 |
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Addressing Mode (SW3-5,6) . . . . . . . . . . . . . . . . . . . . . |
4-20 |
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Specialty I/O Mode (SW3-7) . . . . . . . . . . . . . . . . . . . . . |
4-21 |
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I/O Module Keying (SW3-8) . . . . . . . . . . . . . . . . . . . . . |
4-21 |
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Switch Setting Summary . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-22 |
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SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-22 |
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SW3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-23 |
Publication 1747-UM006B-EN-P - June 2003
Table of Contents iii
Chapter 5
Installation and Wiring |
European Union Direct Compliance. . . . . . . . . . . . . . . . . . |
5-1 |
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EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-1 |
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Installing the1747-ASB Module . . . . . . . . . . . . . . . . . . . . . |
5-1 |
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Link Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-2 |
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Correct Link Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-3 |
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Incorrect Link Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-3 |
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Link Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-4 |
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Wiring a Processor Restart Lockout Switch . . . . . . . . . . . . . |
5-5 |
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I/O Module Addressing Labels. . . . . . . . . . . . . . . . . . . . . . |
5-6 |
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Using a PLC as a Master . . . . . . . . . . . . . . . . . . . . . . . . |
5-6 |
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Using an SLC as a Master . . . . . . . . . . . . . . . . . . . . . . . |
5-6 |
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Octal Label Kit Installation. . . . . . . . . . . . . . . . . . . . . . . . . |
5-7 |
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Applying the Octal Filter Label . . . . . . . . . . . . . . . . . . . |
5-7 |
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Applying the Octal Door Label . . . . . . . . . . . . . . . . . . . |
5-7 |
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Octal Kit and I/O Module Information . . . . . . . . . . . . . |
5-8 |
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Chapter 6 |
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Start-Up and Operation |
System Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6-1 |
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Powerup and Initialization Sequences . . . . . . . . . . . . . . . . |
6-1 |
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Save Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6-2 |
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Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6-2 |
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Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6-3 |
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Communication Exception . . . . . . . . . . . . . . . . . . . . . . . . |
6-3 |
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Inhibit Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6-4 |
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Remote Expansion Chassis Power Loss . . . . . . . . . . . . . . . |
6-6 |
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Invalid RIO Link Transfers . . . . . . . . . . . . . . . . . . . . . . . . . |
6-6 |
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RIO Discrete or Block Transfers To Empty or |
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Nonexistent Chassis Slots . . . . . . . . . . . . . . . . . . . . . . |
6-6 |
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RIO Discrete Transfers To Block Transfer Chassis Slots . 6-7 |
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RIO Block Transfers To Discrete Chassis Slots . . . . . . . . |
6-7 |
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Invalid Length RIO Block Transfers. . . . . . . . . . . . . . . . |
6-7 |
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Testing the 1747-ASB Module . . . . . . . . . . . . . . . . . . . . . . |
6-7 |
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I/O Module Insertion into a Slot . . . . . . . . . . . . . . . . . . |
6-9 |
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I/O Module Removal from a Scanned Slot. . . . . . . . . . . |
6-9 |
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I/O Module Removal from an Unscanned Slot. . . . . . . . |
6-10 |
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Chapter 7 |
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Troubleshooting |
Troubleshooting Introduction . . . . . . . . . . . . . . . . . . . . . . |
7-1 |
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Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . |
7-2 |
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Status Operating Codes for Normal Operating Conditions . . |
7-2 |
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Error Codes for Error Conditions . . . . . . . . . . . . . . . . . . . . |
7-3 |
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DIP Switch Configuration Mismatch Fault Codes - Codes |
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1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7-5 |
Publication 1747-UM006B-EN-P - June 2003
iv Table of Contents
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I/O Module Configuration Mismatch |
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Fault Codes - Code 3 . . . . . . . . . . . . . . . . . . . . . . . . . . |
7-7 |
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I/O Runtime Fault Codes - Code 4 . . . . . . . . . . . . . . . . |
7-8 |
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Chapter 8 |
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Application Examples |
Basic SLC 500 Example Using and RIO Scanner . . . . . . . . . |
8-1 |
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RIO Device Configuration . . . . . . . . . . . . . . . . . . . . . . |
8-2 |
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SLC Processor Image . . . . . . . . . . . . . . . . . . . . . . . . . . |
8-3 |
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1747-ASB Module Configuration Details . . . . . . . . . . . . |
8-4 |
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1747-ASB Module I/O Mapping Details. . . . . . . . . . . . . |
8-4 |
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RIO Address Label Examples . . . . . . . . . . . . . . . . . . . . |
8-5 |
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Application Example Program . . . . . . . . . . . . . . . . . . . |
8-7 |
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Basic SLC 500 Example Using and RIO Scanner . . . . . . . . . |
8-7 |
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RIO Device Configuration . . . . . . . . . . . . . . . . . . . . . . |
8-9 |
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SLC Processor Image . . . . . . . . . . . . . . . . . . . . . . . . . . |
8-10 |
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1747-ASB Module 1 Configuration Details . . . . . . . . . . . |
8-10 |
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1747-ASB Module 2 Configuration Details . . . . . . . . . . . |
8-11 |
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1747-ASB Module 1 I/O Mapping Details . . . . . . . . . . . |
8-12 |
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1747-ASB Module 2 I/O Mapping Details . . . . . . . . . . . |
8-12 |
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RIO Address Label Examples . . . . . . . . . . . . . . . . . . . . |
8-13 |
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Application Example Program . . . . . . . . . . . . . . . . . . . |
8-15 |
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PLC-5 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8-16 |
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RIO Device Configuration . . . . . . . . . . . . . . . . . . . . . . |
8-17 |
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PLC Processor Image . . . . . . . . . . . . . . . . . . . . . . . . . . |
8-18 |
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1747-ASB Module 1 Configuration Details . . . . . . . . . . . |
8-19 |
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1747-ASB Module 2 Configuration Details . . . . . . . . . . . |
8-20 |
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1747-ASB Module 1 I/O Mapping Details . . . . . . . . . . . |
8-21 |
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1747-ASB Module 2 I/O Mapping Details . . . . . . . . . . . |
8-22 |
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RIO Address Label Examples . . . . . . . . . . . . . . . . . . . . |
8-23 |
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Application Example Program . . . . . . . . . . . . . . . . . . . |
8-24 |
Appendix A
Specifications
Appendix B
Differences Between the
1747-ASB Module and the
1771-ASB Series C Module
Appendix C
DIP Switch and Address
Configuration Worksheets
Index
Publication 1747-UM006B-EN-P - June 2003
Preface
Who Should Use this Manual-
Purpose of this Manual
Read this preface to familiarize yourself with the rest of the manual. This preface covers the following topics:
•who should use this manual
•the purpose of this manual
•terms and abbreviations
•conventions used in this manual
•Rockwell Automation support
Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley small logic controllers.
You should have a basic understanding of PLC® and SLC®500 products. You should understand programmable controllers and be able to interpret the ladder logic instructions required to control your
application. If you do not, contact your local Allen-Bradley® representative for information on available training courses before using this product.
This manual is a learning and reference guide for the remote I/O adapter module. It describes the procedures you use to address, configure, install, and operate the 1747-ASB remote I/O adapter module.
Contents of this Manual
Chapter |
Title |
Contents |
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Preface |
Describes the purpose, background, and scope of |
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this manual. Also specifies the audience for |
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whom this manual is intended. |
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1 |
Overview |
Explains and illustrates the theory behind the |
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1747-ASB module's operation. Covers hardware |
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and software features, compatible devices, and |
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setup. |
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2 |
Quick Start for |
Serves as a Quick Start Guide for the 1747-ASB |
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Experienced Users |
module. |
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3 |
Addressing |
Gives a chassis overview, and explains slot |
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numbering, I/O module image mapping, 2-slot, |
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1-slot, and 1/2-slot addressing. |
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Publication 1747-UM006B-EN-P - June 2003
2 Preface
4 |
Configuration |
Contains DIP switch information, and shows odd |
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size chassis and image conditions. |
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5 |
Installation and |
Provides installation procedures and wiring |
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Wiring |
guidelines. |
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6 |
Start-up and |
Explains powerup and initialization sequences, |
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Operation |
normal operation, communication exceptions, |
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remote expansion power loss, invalid RIO link |
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transfers, and testing the 1747-ASB module. |
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7 |
Troubleshooting |
Shows how to interpret and correct problems |
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with your 1747-ASB module. |
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8 |
Application Examples |
Examines both SLC 500 and PLC-5/40t |
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applications using a 1747-ASB module. Gives |
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examples of the ladder programming necessary |
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to achieve the described result. |
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Appendix A |
Specifications |
Contains 1747-ASB and RIO link specifications, |
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as well as throughput information. |
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Appendix B |
Differences Between |
Provides a point-by-point comparison of the 1747 |
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the 1747-ASB and |
and 1771 ASB modules. |
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1771-ASB Series C |
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Modules |
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Appendix C |
Worksheets |
Contains worksheets for setting the 1747-ASB |
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module's DIP switches and addressing remote |
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I/O modules with an SLC processor. |
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Related Documentation
The following documents contain additional information concerning Allen-Bradley SLCt and PLC products. To obtain a copy, contact your local Allen-Bradley office or distributor.
For |
Read This Document |
Document |
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|
Number |
|
|
|
An overview of the SLC 500 family of products |
SLC 500 System Overview |
1747-SO001 |
|
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A description on how to install and use your Modular |
Installation & Operation Manual for Modular |
1747-UM011 |
SLC 500 programmable controller |
Hardware Style Programmable Controllers |
|
|
User Manual |
|
|
|
|
Information regarding the use of a 1747-KE module as a |
DH-485/RS-232C Interface Module User |
1747-6.12 |
communications interface |
Manual |
|
|
|
|
Information regarding the use of the 1747-DCM as a remote |
Direct Communication Module User Manual |
1747-6.8 |
I/O device |
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Publication 1747-UM006B-EN-P - June 2003
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Preface |
3 |
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Information regarding the use of the 1747-SN SLC RIO |
RIO Scanner User Manual |
1747-6.6 |
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scanner |
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Information regarding the use of analog modules with the |
SLC 500 Analog I/O Modules User Manual |
1746-6.4 |
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SLC 500 system |
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Information regarding programming your BASIC module |
SLC 500 BASIC Language Reference |
1746-RM001 |
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In-depth information on grounding and wiring Allen-Bradley |
Allen-Bradley Programmable Controller |
1770-4.1 |
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programmable controllers |
Grounding and Wiring Guidelines |
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A description on how to install a PLC-5r system |
PLC-5 Family Programmable Controllers |
1785-6.6.1 |
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Hardware Installation Manual |
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A description of important differences between solid-state |
Application Considerations for Solid-State |
SGI-1.1 |
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programmable controller products and hard-wired |
Controls |
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electromechanical devices |
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An article on wire sizes and types for grounding electrical |
National Electrical Code |
Published by the |
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equipment |
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National Fire |
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Protection |
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Association of |
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Boston, MA. |
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A glossary of industrial automation terms and abbreviations |
Allen-Bradley Industrial Automation Glossary |
AG-7.1 |
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The following terms and abbreviations are specific to this product. |
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For a complete listing of Allen-Bradley terminology, refer to the |
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Allen-Bradley Industrial Automation Glossary, Publication Number |
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AG-7.1. |
Terms and Abbreviations |
Adapter - Any physical device that is a slave on the RIO link. |
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Adapter Image - That portion of the scanner image assigned to an |
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individual adapter. You configure the adapter image by assigning it a |
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starting logical rack number, starting logical group number and the |
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number of logical groups it uses. In the case of the 1747-ASB module, |
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this is referred to as the 1747-ASB module image. |
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ASB Module - The Catalog Number 1747-ASB Remote I/O Adapter |
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Module. The 1747-ASB module is an adapter. |
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ASB Module Chassis - The chassis directly controlled by the |
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1747-ASB module. This includes the remote chassis and (if installed) |
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two remote expansion chassis. |
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Discrete I/O Module - An I/O module used to sense or control |
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two-state (ON/OFF) devices. |
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Inhibit - A function by which the scanner stops communicating with |
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a logical device. The logical device will consider itself inhibited if it |
Publication 1747-UM006B-EN-P - June 2003
4 Preface
does not receive communications from the scanner within a certain period of time.
I/O Module - Any 1746 or 1747 I/O module that is supported by the 1747-ASB module.
Local Expansion Chassis - A chassis that is connected to a local SLC chassis using a 1747-C9 (91.4 cm [36 in.]) or 1747-C7 (15.2 cm [6 in.]) cable.
Local PLC Chassis - The 1771 chassis that contains a PLC processor and scanner.
Local SLC Chassis - The chassis that contains the SLC processor and scanner.
Logical Device - Any portion of a logical rack that is assigned to a single adapter. Adapters may appear as more than one logical device.
Logical Group - A logical group consists of one input and one output word within a logical rack. A word consists of 16 bits, each bit represents one terminal on a discrete I/O module.
Logical Rack - A fixed section of the scanner image comprised of eight input words and eight output words.
Logical Slot - A logical slot consists of one input and one output byte within a logical group. A byte consists of 8 bits, each bit represents one terminal on a discrete I/O module.
PLC Chassis - A physical PLC rack that houses 1771 I/O modules and PLC processors.
Remote Chassis - The chassis containing a 1747-ASB module and connected to the local SLC or PLC chassis via the RIO link.
Remote Expansion Chassis - A chassis that is connected to a remote chassis using a 1747-C9 (91.4 cm [36 in.]) or 1747-C7
(15.2 cm [6 in.]) cable.
Reset, Adapter Decide - Commands sent by the scanner to a logical device during an RIO discrete transfer. These commands instruct the logical device to reset all of its discrete outputs if hold last state is not selected, or to hold all of its discrete outputs in their last state if hold last state is selected.
Reset, Adapter Reset - Commands sent by the scanner to a logical device during an RIO discrete transfer. These commands instruct the logical device to reset all of its discrete outputs regardless of the hold last state selection.
Publication 1747-UM006B-EN-P - June 2003
Preface 5
Common Techniques Used in this Manual
RIO Block Transfer - The exchange of up to 64 words of data between the scanner and adapter. RIO block transfers only occur if you program them in your processor control program. The 1747-ASB module supports a block transfer of up to 8 words.
RIO Discrete Transfer - The exchange of image data between the scanner and adapter. RIO discrete transfers occur continuously whenever the scanner and adapter are communicating on the RIO link.
RIO Link - An Allen-Bradley communication system supporting high-speed serial transfer of Remote I/O (RIO) control information. This link consists of one master one or more slaves.
Scanner - The communication master on the RIO link.
Scanner Image - The data table area within the scanner, used to exchange I/O information between the scanner and all the adapters on the RIO link. The scanner image is a portion of the SLC or PLC processor image.
SLC Chassis - A physical SLC rack that houses SLC processors, 1746 and 1747 I/O modules.
Slot - The physical location in any chassis used to insert I/O modules.
Specialty I/O Module - An I/O module other than a discrete I/O module (e.g., an analog module).
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.
•Text in this font indicates words or phrases you should type.
Allen-Bradley 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 Allen-Bradley representatives in every major country in the world.
Publication 1747-UM006B-EN-P - June 2003
6 Preface
Rockwell Automation
Support
Before you contact Rockwell Automation for technical assistance, we suggest you please review the troubleshooting information contained in this publication first.
If the problem persists, call your local Rockwell Automation representative or contact Rockwell Automation in one of the following ways:
Phone |
United |
1.440.646.5800 |
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States/Canada |
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Outside United |
You can access the phone number for your |
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States/Canada |
country via the Internet: |
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1. |
Go to http://www.ab.com |
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2. |
Click on Product Support |
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(http://support.automation.rockwell.com) |
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3. |
Under Support Centers, click on Contact |
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Information |
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Internet |
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1. Go to http://www.ab.com |
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2. Click on Product Support |
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(http://support.automation.rockwell.com) |
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Your Questions or Comments on this Manual
If you find a problem with this manual, please notify us of it.
If you have any suggestions for how this manual could be made more useful to you, please contact us at the address below:
Rockwell Automation
Automation Control & Information Group
Technical Communication, Dept. 602V
P.O. Box 2086
Milwaukee, WI 53201-208
Publication 1747-UM006B-EN-P - June 2003
Chapter 1
1747-ASB Module
Overview
Overview
This chapter presents:
•1747-ASB module overview
•remote I/O overview
•compatible devices
•1747-ASB module features
•setup and operational overview
The 1747-ASB module is an SLC 500 single-slot, RIO communication link module. It occupies the first slot (slot 0) of a 1746 remote chassis, where the SLC processor normally resides.
The 1747-ASB module is an adapter, or slave, on the RIO link, and the master of the remote chassis and remote expansion chassis it is installed in. Remote expansion chassis are optional. It acts as a gateway between the scanner and the I/O modules residing in the remote chassis and remote expansion chassis. The 1747-ASB module maps the image of the I/O modules in its remote chassis and remote expansion chassis directly to the SLC or PLC processor image.
Output data is sent from the scanner of either the SLC or PLC local chassis to the 1747-ASB module across the RIO link. This data is automatically transferred to the output modules across the chassis backplane by the 1747-ASB module. Inputs from the input modules are collected via the backplane by the 1747-ASB module and sent back to the scanner across the RIO link. No user programming of the 1747-ASB module is necessary.
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Remote Chassis Remote Expansion Chassis |
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Outputs to |
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Remote Chassis Remote Expansion Chassis
Publication 1747-UM006B-EN-P - June 2003
1-2 Overview
Remote I/O Overview
To better understand the use of the 1747-ASB module, you should have an understanding of the RIO link. The RIO link is an Allen-Bradley communications system supporting high-speed transfer of control information. An RIO link consists of a single master device and one or more slave devices. The master device is referred to as the scanner. The slave devices are referred to as adapters (such as the 1747-ASB module).
RIO scanners and adapters work together to serially communicate PLC or SLC processor data to remotely located I/O devices. PLC and SLC processors exchange inputs and outputs with scanners. Scanners exchange inputs and outputs with adapters located on the RIO link. The adapter's control is based on the adapter type.
How The Scanner Interacts With Adapters
The scanner's function is to continuously scan the adapters on the RIO link in a consecutive manner. The scan consists of one or more RIO discrete transfers to each adapter on the RIO link.
RIO discrete transfers consist of the scanner sending output image data and communication commands to the adapter that instruct the adapter on how to control its output. (These include run, reset, adapter reset, and reset decide commands.) The adapter responds by sending input data to the scanner. The scanner performs as many RIO discrete transfers as necessary to update the entire adapter image. If RIO discrete transfers do not occur, data is not exchanged between the scanner and adapter.
IMPORTANT |
RIO discrete transfers are asynchronous with the |
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Publication 1747-UM006B-EN-P - June 2003
Overview 1-3
Scanner
Processor
SLC Local Chassis
RIO Link
Processor/Scanner
PLC Local Chassis
RIO Link
1747-ASB Module
RIO Discrete
Transfers with
Adapter 1
Remote Chassis Remote Expansion Chassis
RIO Discrete
Transfers with
Adapter 2
RediPANEL
1747-ASB Module
RIO Discrete
Transfers with
Adapter 3
Remote Chassis Remote Expansion Chassis
RIO Discrete Transfers with Adapter 4
RediPANEL
1747-ASB Module
RIO Discrete Transfers with
Adapter 1
Remote Chassis Remote Expansion Chassis
RIO Discrete
Transfers with
Adapter 2
RediPANEL
1747-ASB Module
RIO Discrete Transfers with Adapter 3
Remote Chassis Remote Expansion Chassis
RIO Discrete Transfers with Adapter 4
Publication 1747-UM006B-EN-P - June 2003
1-4 Overview
Scanner I/O Image Division
The scanner allows each adapter to use a fixed amount (user defined) of the scanner's input and output image. Part of the processor's image is used by local I/O, the other portion is used by the scanner for remote I/O. For a PLC-5, logical rack 0 is dedicated for local I/O.
The scanner's remote I/O image is divided into logical racks and further divided into logical groups. A full logical rack consists of eight input and eight output image words. A logical group consists of one input and one output word in a logical rack. Each logical group is assigned a number from 0 to 7. The number of racks available for remote I/O depends on the scanner you are using.
Local I/O
Logical Rack 0
Remote I/O
(Scanner Logical Rack 1
Image)
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The scanner image also contains the image of each adapter on the RIO link. The adapter is assigned a portion of the scanner image, which is referred to as the adapter image.
Crossing Logical Rack Boundaries
Adapter image size is expressed in an even number of groups. For example, the 1747-ASB module image can be any size between 2 logical groups and 32 logical groups (4 logical racks), in 2 logical group increments.
If the adapter's image size is greater than 8 logical groups, the image crosses logical rack boundaries. If an adapter's image size is less than 8 logical groups, it too can cross a logical rack boundary depending upon the starting logical group number. The significance of crossing logical rack boundaries is discussed in the next section.
Publication 1747-UM006B-EN-P - June 2003
Overview 1-5
Scanner Input or Output Image
Bit Number (Octal) |
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Scanner Input or Output Image
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Adapter image is 6 logical groups in size and crosses a logical rack boundary due to its starting logical group number. .
IMPORTANT |
Due to SLC and PLC addressing differences, when |
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the 1747-ASB module is used with an SLC processor, |
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the image bit numbers are 0 to 7, 8 to 15 decimal. |
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When the 1747-ASB module is used with a PLC |
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processor, the image bit numbers are 0 to 7, 10 to 17 |
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octal. The I/O image figures, like the two above, |
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Creating More Than One Logical Device by Crossing a Logical Rack Boundary
RIO discrete transfers occur on a logical device basis, not an adapter basis. A logical device is any portion of a logical rack that is assigned to a single adapter.
When an adapter's image is more than one logical device, the scanner sees the single adapter as multiple adapters on the RIO link. The scanner communicates with each logical device independently, even if the logical devices are all assigned to one adapter. If an adapter image is more than one logical device, the following is true:
Not all of the adapter image is updated by the scanner at the same time. The number of logical devices determines the number of RIO discrete transfers that are needed to update the entire adapter image.
Publication 1747-UM006B-EN-P - June 2003
1-6 Overview
The adapter may receive different communication commands for each logical device. In this case, the adapter decides which command it responds to.
Scanner Input or Output Image
In this example, two RIO discrete transfers are required for the scanner to update the adapter image containing two logical devices.
Bit Number (Octal) |
17 |
10 |
7 |
0 |
Bit Number (Decimal) |
15 |
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To understand how an adapter's logical devices are assigned, use appendix D to determine the address configuration of your remote I/O modules. You may then want to reassign certain adapters so their images do not cross logical rack boundaries, allowing the scanner to update their images in one RIO discrete transfer.
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IMPORTANT |
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more than one logical device. For example, the |
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discrete transfers from the scanner. |
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Transferring Data With RIO Discrete and Block Transfers
Input and output image data and command information is quickly exchanged between a scanner and adapter using RIO discrete transfers. RIO discrete transfers are the simplest way a scanner and adapter communicate with each other. RIO discrete transfers, which are transparent to the user, consist of the scanner sending the output image data to the adapter, and the adapter transmitting input data to the scanner. Each RIO discrete transfer also contains scanner commands for the adapter.
Publication 1747-UM006B-EN-P - June 2003
Overview 1-7
RIO block transfers are initiated by a special command from the PLC processor, typically when large amounts of data must be exchanged with one specialty I/O module. Block transfers use the basic RIO discrete transfer mechanism of the RIO link. However, the actual transfer of data occurs asynchronous to the discrete transfers. It is possible for several discrete transfers to occur before a block transfer is processed.
RIO Discrete Transfer Example
This example illustrates how additional discrete transfers are required when an adapter image crosses logical rack boundaries. It consists of one scanner and three adapters. Adapter 1 requires one RIO discrete transfer from the scanner to update its entire image. Adapter 2 requires two RIO discrete transfers to update its image. Adapter 3 requires three RIO discrete transfers to update its image.
Scanner Input or Output Image
1747-ASB Module
to scanner
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Adapter Image Size: 8 logical groups |
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(1)The scanner updates the adapter image in one RIO discrete transfer because the adapter image is contained within one logical rack.
(2)The scanner updates the adapter image in two RIO discrete transfers because the adapter image crosses a logical rack boundary making the adapter image appear as two logical devices.
(3)The scanner updates the adapter image in three RIO discrete transfers because the adapter image crosses two logical rack boundaries making the adapter image appear as three logical devices.
Publication 1747-UM006B-EN-P - June 2003
1-8 Overview
Physical and Logical RIO Link Specifications
The maximum number of adapters that your scanner can communicate with is determined by the scanner and adapter's physical and logical specifications, as described below:
Physical Specifications are the maximum number of adapters that can be connected to the scanner. For more information, see Extended Node Capability below.
Logical Specifications for the scanner are the maximum number of logical racks the scanner can address, how the logical racks can be assigned, and whether the scanner can perform block transfers.
For adapters, logical specification refers to the maximum size of the adapter's RIO image.
Extended Node Capability
Both scanners and adapters can have extended node capability. Extended node capability allows you to use an 82 Ohm termination resistor at both ends of the RIO link for all baud rates. Extended node capability also allows for up to 32 adapters to be placed on the RIO link.
Extended node capability can only be used if the scanner and all adapters on the RIO link have extended node capability. The 1747-ASB module has extended node capability.
The tables on pages 1-10 and 1-11 provide lists of compatible RIO scanners and adapters.
The 1747-ASB module is compatible with all Allen-Bradley scanners. Scanners that do not support RIO block transfers do not work with all of the I/O modules supported by the 1747-ASB module. For example, the Catalog Number 1747-SN Series A, RIO Scanner does not work with a Catalog Number 1746-BAS, BASIC module because the scanner does not support RIO block transfer.
Publication 1747-UM006B-EN-P - June 2003
Overview 1-9
Compatible RIO Scanners
Refer to the appropriate scanner manual for details concerning physical and logical specifications.
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Catalog Number |
Description |
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1771-SN(1) |
Sub I/O scanner for Mini-PLC®-2 and PLC-5 families |
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1785-L11B(2) |
PLC-5/11™ (in scanner mode) |
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1785-L20B(2) |
PLC-5/20™ (in scanner mode) |
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1785-L30x(2) |
PLC-5/30™ (in scanner mode) |
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1785-L40x(2) |
PLC-5/40 (in scanner mode) |
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1785-L60x(2) |
PLC-5/60™ (in scanner mode) |
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1747-SN(2)(3) |
SLC Remote I/O Scanner |
(1)Revision D or later.
(2)Extended node capability.
(3)Series A scanner does not have block transfer.
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Compatible RIO Adapters |
The 1747-ASB module can physically reside on the RIO link with any |
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other adapter. The following table lists the adapters available for use |
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Catalog Number |
Description |
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1785-L30x(1)(2) |
PLC-5/30 (in adapter mode) |
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1785-L40x(1)(2) |
PLC-5/40 (in adapter mode) |
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1785-L60x(1)(2) |
PLC-5/60 (in adapter mode) |
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1771-ASC |
Remote I/O Adapter Module |
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1771-ASB(3)(4) |
Remote I/O Adapter Module |
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1771-RIO |
Remote I/O Interface Module |
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1771-DCM |
Direct Communication Module |
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1747-DCM(1) |
Direct Communication Module |
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2711-xx(1) |
PanelView™ Terminal |
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1336-G2(1) |
Remote I/O Adapter for 1336 AC Industrial Drives |
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1395-NA(1) |
Remote I/O Adapter for 1395 DC Industrial Drives |
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1747-ASB(1) |
Remote I/O Adapter Module |
(1)Extended node capability.
(2)In adapter mode.
(3)Series A, B, and C.
(4)Extended node capability for Series B and C.
Publication 1747-UM006B-EN-P - June 2003
1-10 Overview
Compatible Modules
1747-ASB Module Feature
The 1747-ASB module supports all SLC 5/01 compatible I/O modules (class 0 and 1). The following modules can be placed in the remote chassis and remote expansion chassis:
•all discrete I/O modules
•all analog I/O modules
•BASIC Modules, Catalog Number 1746-BAS, -BAST (SLC 5/01 mode)
•IMC 110 motion control module, Catalog Number 1746-HS
•Direct Communication Module, Catalog Number 1747-DCM
•Thermocouple/mV input modules, Catalog Number 1746-NT4, NT8
•RTD/Resistance Modules, Catalog Number 1746-NR4, NR8
•High Speed Counter Module, Catalog Number 1746-HSCE 2
The 1747-ASB module has the following features:
•communicates I/O data up to a maximum of 3040 meters (10,000 feet)
•supports 57.6K, 115.2K, and 230.4K baud operation on the RIO link
•supports any mix of 1746 discrete or analog I/O
•controls up to 30 slots using remote expansion chassis
•allows use of 2-slot, 1-slot, and 1/2-slot addressing
•allows for image sizes between 2 and 32 logical groups (user selectable)
•incorporates enhanced operating status and troubleshooting capability using three 7-segment displays
•provides non-volatile memory for convenient I/O module slot keying
•provides discrete output module hold last state selection
•provides RIO link processor restart lockout selection
•incorporates extended node capability
•supports RIO block transfers and RIO discrete transfers for analog and other specialty I/O modules
•supports complementary I/O on the RIO link
Publication 1747-UM006B-EN-P - June 2003
Overview 1-11
Hardware Features
The 1747-ASB module's hardware features are highlighted below. Detailed installation, operation, and troubleshooting information is contained in chapters 5, 6, and 7.
COMM LED |
FAULT LED |
(Green) |
(Red) |
ADAPTER |
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COMM |
F AUL T |
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ST ATUS |
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Status Display |
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(MSB) |
2 1 |
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LOGICAL |
3 |
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SW1 |
65 4 |
Door |
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(LSB) |
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RACK |
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GROUP |
8 |
Label |
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LOGICAL |
7 |
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O N |
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LINE 1 |
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BAUD |
1 |
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SHLD |
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RATE |
2 |
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LINE 2 |
SW2 |
PRI/COMP |
3 |
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(MSB) |
5 4 |
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RSV |
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NC |
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6 |
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IMAGE |
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IN |
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SIZE |
7 |
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RIO Link and |
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(LSB) |
8 |
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RET |
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O N |
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Processor |
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Restart |
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HLS |
1 |
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Lockout |
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PRL |
2 |
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RESP |
3 |
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Connector |
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SW3 |
LAST CHA |
5 4 |
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ADDR |
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MODE |
6 |
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SP MODE |
7 |
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KEY |
8 |
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1747–ASB |
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Cable Tie Slots
DIP Switches
543 2 1 N SW3 |
SW2 |
543 2 1 N |
543 2 1 N SW1 |
.NOSERIAL |
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CAT |
REMOTE |
500SLC |
O |
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O |
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7 6 |
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7 6 |
7 6 |
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I/O |
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8 |
FRN |
R |
SER |
ADAPTER |
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CB,A,GROUPS1, CLASS |
A196.LOC.HAZFOR |
EQCONTIND..LISTED |
MODULE |
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Manufacturing Test Plug |
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U |
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L |
MODULAROFZEROSLOT IN INSTALL 375mAREQUIREMENT:CURRENT |
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1MFAC |
2 DIV. D, AND |
OPERATING TEMPERATURER SA T3CCODE |
:ANTIMPORT |
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USA IN MADE |
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ONLY CHASSIS |
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Self-Locking Tab
Status Display and LEDs
The Status Display provides alphanumeric status of the 1747-ASB module and RIO link. When combined with the COMM and FAULT LEDs, they are very effective troubleshooting tools.
DIP Switches
The 1747-ASB module's three DIP switches allow you to configure the following items:
•Starting Logical Rack Number (Logical Rack) - is the 1747-ASB module's starting logical rack number in the scanner's image.
•Starting Logical Group Number (Logical Group) - is the 1747-ASB module's starting logical group number within the scanner's image.
Publication 1747-UM006B-EN-P - June 2003
1-12 Overview
•Baud Rate (Baud Rate) - is the 1747-ASB module's RIO link communication rate. The baud rate must be the same for all adapters on the RIO link.
•Primary/Complementary SLC Chassis (PRI/COMP) - determines whether the 1747-ASB module appears to the scanner as a primary or complementary chassis.
•Adapter Image Size (IMAGE SIZE) - indicates the I/O image size to be reserved for the adapter. It can be any size between 2 and 32 groups in two logical group increments.
•Hold Last State (HLS) - determines whether the discrete output modules are held in their last state when:
–RIO link communication with the 1747-ASB module is lost.
–The scanner inhibits the 1747-ASB module.
–The scanner sends Reset, Adapter Decide commands to the 1747-ASB module.
•Processor Restart Lockout (PRL) - determines whether the 1747-ASB module automatically resumes RIO link communications if communication is lost and then restored.
•Link Response Time (RESP) - selects restricted or unrestricted RIO link response time.
•Last Chassis (LAST CHA) - When the 1747-ASB module is used with a PLC-2 or PLC-5, this switch indicates to the scanner that the 1747-ASB module is the last adapter mapped into the 1747-ASB module's highest logical rack.
•Addressing Mode (ADDR MODE) - determines the 1747-ASB module's remote chassis and remote expansion chassis addressing mode. 2-slot, 1-slot, and 1/2-slot is available.
•Specialty I/O Mode (SP MODE) - determines whether the 1747-ASB module discretely maps or block transfer maps specialty I/O modules in its remote chassis and remote expansion chassis.
•I/O Module Keying (KEY) - determines if the 1747-ASB module saves its current I/O module and DIP switch configuration to its non-volatile memory, or if the 1747-ASB module compares the current I/O module and DIP switch configuration to the one saved in its non-volatile memory.
Publication 1747-UM006B-EN-P - June 2003
Overview 1-13
RIO Link and Processor Restart Lockout Connector
The 6-pin male connector attaches the 1747-ASB module to the RIO link and processor restart lockout device.
Door Label
The door label provides DIP switch and wiring information.
Self-Locking Tabs
Self-locking tabs secure the module in the rack. No tools are necessary to install or remove a module.
Cable Tie Slots
Cable tie slots can be used to secure the wiring cable to the module.
Publication 1747-UM006B-EN-P - June 2003
1-14 Overview
Publication 1747-UM006B-EN-P - June 2003
Chapter 2
Required Tools and
Equipment
Quick Start for Experienced Users
This chapter helps you to get started using the 1747-ASB module. We base the procedures here on the assumption that you have an understanding of PLC and SLC 500 products, as well as the RIO link. 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 detailed information.
If you have any questions, or are unfamiliar with the terms used or concepts presented in the procedural steps, always read the referenced chapters before trying to apply the information.
This chapter:
•tells you what tools and equipment you need
•lists preliminary considerations
•describes when to address and configure the module
•explains how to install and wire the module
•discusses system power-up procedures
Have the following tools and equipment ready:
•medium blade screwdriver
•(2) 1/2 watt terminating resistors (See chapter 5, Installation and Wiring, for correct size.)
•an adequate length of RIO communication cable (Belden 9463) for your specific application (See Chapter 5 Installation and Wiring, for maximum cable distances.)
Publication 1747-UM006B-EN-P - June 2003
2-2 Quick Start for Experienced Users
Procedures
1. |
Check the contents of shipping box. |
Reference |
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Unpack the shipping box making sure that the contents include: |
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•Remote I/O adapter module (Catalog Number 1747-ASB)
•user manual (Publication 1747-6.13)
If the contents are incomplete, call your local Rockwell Automation representative for assistance.
2. |
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Ensure your chassis supports placement of the 1747-ASB module. |
Reference |
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Check to see that your chassis supports placement of the adapter module by: |
Appendix A |
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• reviewing the power requirements of your system (The adapter consumes 600 mA |
(Specifications) |
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at 5VDC.) |
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• calculating the total load on the system power supply using the procedure described |
Appendix B |
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in Appendix B |
(Understanding |
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your |
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SLC 500/1746 |
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Control System) |
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3. |
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Choose the type of slot addressing you will use. |
Reference |
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Select 1747-ASB addressing (i.e., 2-slot, 1-slot, or 1/2-slot). A configuration worksheet is |
Chapter 3 |
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included in appendix D to assist you in 1747-ASB image table addressing. |
(Addressing) |
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Important: Due to SLC and PLC addressing differences, when the 1747-ASB module is used |
Appendix D |
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with an SLC processor, the image bit numbers are 0 to 7, 8 to 15 decimal. When the |
(DIP Switch and |
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1747-ASB module is used with a PLC processor, the image bit numbers are 0 to 7, 10 to 17 |
Address |
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octal. |
Configuration |
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Worksheets) |
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4. |
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Configure the module using the DIP switches. |
Reference |
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Set the DIP switches (located on the printed circuit board) to the desired setting. A |
Chapter 4 |
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worksheet is included in appendix D to assist you in DIP switch configuration. |
(Configuration) |
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Appendix D
(DIP Switch and
Address
Configuration
Worksheets)
Publication 1747-UM006B-EN-P - June 2003
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