A01428 fault in siemens 6RA80 DC Drive indicate that the Incorrect connection used. This means the topology comparison has detected differences in the actual and target topologies in relation to one component.

1. Reinsert the DRIVE-CLiQ cable to the component (correct the actual topology).
2. Adapt the project/parameterization in the commissioning software (correct the target topology).
3. Automatically remove the topology error (p9904).