Siemens SINAMICS S210 Operating Instructions Manual page 485

Remedy: Not necessary.
The alarm is automatically withdrawn after the motor data identification routine has been successfully completed or for the
setting p1910 = 0 or p1960 = 0.
If a POWER ON or a warm restart is performed with motor data identification selected, the motor data identification request
will be lost. If motor data identification is required, it will need to be selected again manually following ramp-up.
Reaction upon N: NONE
Acknowl. upon N: NONE
F07993 Drive: Incorrect direction of rotation of the field or encoder actual value inversion
Message value: -
Drive object: All objects
Reaction: OFF2 (NONE)
Acknowledge: IMMEDIATELY
Cause: Either the direction of the rotating field or the encoder actual value has an incorrect sign. The motor data identification
automatically changed the actual value inversion (p0410) in order to correct the control sense. This can result in a direction
of rotation change.
Note:
To acknowledge this fault, the correctness of the direction of rotation must first be acknowledged with p1910 = -2.
Remedy: Check the direction of rotation (also for the position controller, if one is being used).
If the direction of rotation is correct, the following applies:
No additional measures are required (except set p1910 = -2 and acknowledge fault).
If the direction of rotation is incorrect, the following applies:
To change the direction of rotation, two phases must be interchanged and the motor identification routine must be repeated.
F07995 Drive: Pole position identification not successful
Message value: %1
Drive object: All objects
Reaction: OFF2
Acknowledge: IMMEDIATELY
SINAMICS S210 servo drive system
Operating Instructions, 12/2017, A5E41702836B AA
Faults and alarms
13.2 List of faults and alarms
483