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Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 9

Table of Contents

Appendix C

Use Ladder Logic To Perform

Run Time Services and

Reconfiguration

Using Message Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Processing Real-time Control and Module Services . . . . . . . . . . . . . . . . 214

One Service Performed Per Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Create a New Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Enter Message Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Configuration Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

Communication Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Use Timestamped Inputs and Scheduled Outputs

for Standard and Diagnostic I/O Modules. . . . . . . . . . . . . . . . . . . . . 222

Use Timestamped Inputs and Scheduled Outputs

for Fast I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Reset a Fuse, Perform Pulse Test and Reset Latched Diagnostics. 227

Perform a WHO to Retrieve Module Identification and Status. . 228

Review of Tags in Ladder Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

Appendix D

Choose a Correct Power Supply

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

Appendix E

Motor Starters for Digital I/O Modules

Determine the Maximum Number of Motor Starters. . . . . . . . . . . 236

Appendix F

Major Revision Upgrades

If Using a Compatible or Disabled Keying I/O Configuration . . . . . . 238

If Using an Exact Match Keying Configuration . . . . . . . . . . . . . . . . . . . . 238

Appendix G

1492 IFMs for Digital I/O Modules

Cable Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Appendix H

History of Changes

1756-UM058F-EN-P, April 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

1756-UM058E-EN-P, August 2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Glossary

Index

Allen-Bradley 1756-IA8D User Manual

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