Operating Instructions

4 Faults and alarms
4.2 List of faults and alarms
SINAMICS G120 CU230P-2 Control Units
796 List Manual, 04/2018, A5E33838102
F07332 Flying restart: maximum speed reduced
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: The maximum speed that can be reached is reduced; at very high speeds problems associated with the flying restart
can be encountered.
Possible causes:
- power ratio, power unit/motor too high
Remedy: Parameter changes are not required.
Note:
A flying restart at speeds above 3000 rpm should be avoided.
A07352 Drive: Limit switch signals not plausible
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: Limit switch signals are not plausible.
Possible causes:
- BICO interconnections are not OK (p3342, p3343).
- sensors are not supplying a valid signal (both supply a 0 signal).
Remedy: - check the BICO interconnections for the limit switch signals.
- check the sensors.
See also: p3342 (Limit switch plus), p3343 (Limit switch minus)
A07353 Drive: DC quantity control deactivated
Message class: Motor overload (8)
Reaction: NONE
Acknowledge: NONE
Cause: The DC quantity control has deactivated itself.
The manipulated variable of the DC quantity control was at its limit.
Remedy: Optimize the DC quantity controller (Kp, Tn, bandwidth, PT2 filter).
Note:
After changing the corresponding parameters, the DC quantity control is re-enabled and the alarm is automatically
withdrawn.
See also: p3857 (DC quantity controller P gain), p3858 (DC quantity controller integral time)
F07390 Drive: DC link capacitor forming fault
Message class: Motor overload (8)
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The "DC link capacitor forming" function was canceled with fault (r3382.3 = 1). The expected DC link voltage is out of
tolerance.
See also: p3380 (Forming activation/duration), r3382 (Forming status word)
Remedy: - check drive device (supply voltage, terminals, ...).
- set activation/duration again (p3380 > 0).
- restart forming (p0840 = 0/1 signal).
A07391 Drive: DC link capacitor forming active
Message class: Motor overload (8)
Reaction: NONE
Acknowledge: NONE
Cause: The "DC link capacitor forming" function is active. The remaining time of the operation is displayed in parameter
r3381.
See also: p3380 (Forming activation/duration)