Siemens SINAMICS S210 - Drive: Motor Overcurrent; Drive: Infeed or Power Unit Not Ready

Acknowledge: IMMEDIATELY
Cause: The power unit parameters cannot be read or no parameters are stored in the power unit.
It is possible that the DRIVE-CLiQ cable between the Control Unit and power unit is interrupted or defective.
Note:
This fault also occurs if an incorrect topology was selected in the commissioning tool and this parameterization is then
downloaded to the Control Unit.
Remedy: - carry out a POWER ON (switch-off/switch-on) for all components.
- check the DRIVE-CLiQ cable between the Control Unit and power unit.
- check the power unit and replace if necessary.
- check the Control Unit, and if required replace it.
- after correcting the topology, the parameters must be again downloaded using the commissioning tool.
F07801 Drive: Motor overcurrent
Message value: -
Drive object: All objects
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The permissible motor limit current was exceeded.
- effective current limit set too low.
- current controller not correctly set.
- motor was braked with an excessively high stall torque correction factor.
- U/f operation: Up ramp was set too short or the load is too high.
- U/f operation: Short-circuit in the motor cable or ground fault.
- U/f operation: Motor current does not match the current of Motor Module.
Note:
Synchronous motor: Limit current= 1.3 x p0323
Induction motor: Limit current= 1.3 x r0209
Remedy: - check the current limits (p0323, p0640).
- check the current controller (p1715, p1717).
- reduce the stall torque correction factor (p0326).
- increase the up ramp (p1318) or reduce the load.
- check the motor and motor cables for short-circuit and ground fault.
- check the Motor Module and motor combination.
F07802 Drive: Infeed or power unit not ready
Message value: -
Drive object: All objects
Reaction: OFF2 (NONE)
Acknowledge: IMMEDIATELY
Cause: After an internal switch-on command, the infeed or drive does not signal ready.
- monitoring time is too short.
- DC link voltage is not present.
- associated infeed or drive of the signaling component is defective.
- supply voltage incorrectly set.
Remedy: - increase the monitoring time (p0857).
- ensure that there is a DC link voltage. Check the DC link busbar. Enable the infeed.
- replace the associated infeed or drive of the signaling component.
- check the line supply voltage setting (p0210).
Faults and alarms
13.2 List of faults and alarms
SINAMICS S210 servo drive system
Operating Instructions, 12/2017, A5E41702836B AA 461