A07504 alarm in siemens 6RA80 DC Drive indicate that the Motor data set is not assigned to a drive data set. This means a motor data set is not assigned to a drive object.

In the drive data sets, assign the non-assigned motor data set using the MDS number (p0186[0...n]).

- check whether all of the motor data sets are assigned to drive data sets.
- if required, delete superfluous motor data sets.
- if required, set up new drive data sets and assign to the corresponding motor data sets.