Cause : FBA A parameter conflict comes when the drive does not have a functionality requested by PLC, or requested functionality has not been activated.

The fault code 65A1 in your ABB ACS560 drive indicates a parameter conflict due to a missing functionality requested by the PLC. This means there's a mismatch between the control signals your Programmable Logic Controller (PLC) is sending to the drive itself.

1. Check PLC programming.
2. Check settings of parameter groups 50 Fieldbus adapter (FBA) and 51 FBA A settings.