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Rockwell Automation 1715-OF8I Redundant I/O System User Manual User Manual

Page 272

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272

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014

Appendix C

1715-IB16D Digital Input Module Diagnostics

By considering these two components—EOL resistor values and the threshold

values, we can arrive at the diagnostic settings for the module.

Figure 70 - Common EOL Device Scenario

Figure 71 - Threshold Settings

1

5

4

Term

As

R1

R2

45678

Short

Circuit

On

Indeterminate

On

Off

Off

Open

Wire