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What can cause a Load Slipping Fault (AnF) on a ATV320 drive?

Issue:
Cause of a Load Slipping Fault (AnF) on a ATV320 drive.

Product Line:
ATV320 drive

Environment:
AnF faults

Cause:
The difference between the output frequency and the speed feedback is not correct.

Resolution:
Check the motor, gain and stability parameters.
Check the size of the motor /drive load.
Check the encoder’s mechanical coupling and its wiring.
Recheck all the motor parameters
May need to add a braking resistor and turn off the brA.