Applicable Systems
DVP
AH500
AS300
C2000
MS300
Symptoms
Communication with an expansion module has timed out. The module is not responding within the expected time.
Possible Causes
- Module communication processor failure
- Excessive noise on the communication bus
Troubleshooting Steps
- Step 1: Check the communication cable for damage or noise
Cable is in good condition - Step 2: Verify the module is powered and responding
Module is powered but not responding
How to Reset
To reset: Fix the communication issue or replace the module, then power-cycle.
Source: Delta DVP PLC Programming Manual, Delta Electronics
Category: PLC & VFD