Applicable Systems
DVP
AH500
AS300
C2000
MS300
Symptoms
An expansion module reports a communication fault. The module cannot exchange data with the PLC.
Possible Causes
- Communication bus cable damaged or disconnected
- Module communication interface failure
Troubleshooting Steps
- Step 1: Check the communication bus cable and connections
Cable and connections are secure - Step 2: Verify the module communication LED status
Communication LED indicates a fault
How to Reset
To reset: Fix the communication cable or interface, then power-cycle the PLC.
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Source: Delta DVP PLC Programming Manual, Delta Electronics
Category: PLC & VFD
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