Cause : power unit incorrectly inserted comes when the topology comparison has detected a power unit in the actual topology that has been incorrectly inserted.

"A01381" fault in siemens 6RA80 DC Drive indicate that the power unit incorrectly inserted. This means the drive system is no longer booted. In this state, the drive control (closed-loop) cannot be enabled.

1. Insert the components involved at the right connection (correct the actual topology).
2. Adapt the project/parameterization in the commissioning software (correct the target topology).
3. Automatically remove the topology error (p9904).