Applicable Systems
AC500
AC590
ACS580
ACS880
Symptoms
AC500 PLC communication warning detected.
Possible Causes
- AC500 communication cable fault
- Communication parameter mismatch
- EMI on communication line
Troubleshooting Steps
- Step 1: Check AC500 communication cable
Cable intact and securely connected - Step 2: Verify communication parameters match drive and PLC
Parameters consistent - Step 3: Inspect for EMI sources near communication cable
No interference sources
How to Reset
Reset via control panel after communication is restored.
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Source: ABB ACS580 Firmware Manual
Category: PLC & VFD
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