Installation manual

Publication 1747-RM001G-EN-P - November 2008
xviii Table of Contents
On/Off Circuit Application Example. . . . . . . . . . . . . . . . . . . . . . . G-16
On/Off Circuit Ladder Program. . . . . . . . . . . . . . . . . . . . . . . . . . . G-17
Interfacing with Enhanced Bar Code Decoders Over DH-485
Network Using the MSG Instruction . . . . . . . . . . . . . . . . . . . . . . . G-17
Processor and Decoder Operation . . . . . . . . . . . . . . . . . . . . . . G-17
System Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-18
Operating Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-19
Sequence of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-20
Optimizing MSG Time-out. . . . . . . . . . . . . . . . . . . . . . . . . . . . G-21
Example MSG Instruction Configuration . . . . . . . . . . . . . . . . G-21
Example Scanner and Decoder Configuration. . . . . . . . . . . . . G-22
Example Ladder Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-23
Appendix H
Supported Read/Write Commands
Supported Read/Write Commands. . . . . . . . . . . . . . . . . . . . . . . . . . H-1
Index SLC 500 Alphabetical List of Instructions . . . . . . . . . . . . . . . . . 1-11
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Installation Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
New Product Satisfaction Return . . . . . . . . . . . . . . . . . . . . . . . . 1-12