Rockwell Automation Publication 442G-UM001B-EN-P - May 2016 65
Troubleshooting and Assistance Appendix A
Close the door and activate guard locking to avoid interruptions during
configuration.
Individual Flickering Input LED on the Evaluation
Unit
Even when the Access Box is switched off, it emits a pulse sequence at output
FO1A to verify the functional capability of the output circuit at all times. So, a
faintly flickering LED can be seen on an input of an evaluation unit even
though the evaluation unit does not switch on or signal any fault.
TIP Close the door and activate guard locking to avoid interruptions during
configuration.
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