Instruction Manual

24 CompactBlock Distributed I/O on PROFIBUS DP Series D
Publication
1791P-IN002B-EN-P - October 2003
Troubleshoot with the Indicators
The 1791P I/O module has the following indicators:
• Module Status indicator - base only
• Network Status indicator - base only
• I/O Status indicators - base and expansion
Module Status Indicator
Indication: Status:
Off No power
Green Module operating correctly
Red Hardware or software error
Flashing Red Communication failure
Flashing Red/Orange Expansion error
Network Status Indicator
Indication: Status:
Off Network offline
Yellow Network online
I/O Status Indicators
Function Indicator Module
Illumination
Condition
Outputs Each output:
Yellow
None
Yellow
Output not energized
Output energized
Inputs Each Input:
Yellow
None
Yellow
No valid input
Valid input