A07220 alarm in siemens 6RA80 DC Drive indicate that the Master control by PLC missing. This means the "master control by PLC" signal was missing in operation.

1. Check the interconnection of the binector input for "master control by PLC" (p0854).
2. Check the "master control by PLC" signal and, if required, switch in.
3. Check the data transfer via the fieldbus (master/drive).