Faults and Alarms
List of Faults and Alarms
3-626
© Siemens AG 2009 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 11/2009
F07937 (N) Drive: Speed deviation between motor model and external speed
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The absolute value of the speed difference from the two actual values (r2169, r1443) exceeds the tolerance threshold
(p3236) for longer than the time set in p3238.
Possible causes could be:
- External encoder signal wired incorrectly (p1440)
- Speed encoder for external encoder signal faulty
- Encoder signal's polarity or gain incorrect
- Smoothing time constant for model speed for monitoring p2157 too high
- Smoothing time constant or threshold values for monitoring too low (p3236, p3238)
See also: p2149 (Monitoring configuration)
Remedy: - Check that the external speed (see p1440, r1443) matches the motor speed.
- Check the polarity of the external speed (r1443).
- Check connector connection p1440.
F07950 (A) Motor parameter incorrect
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: - the motor parameters were incorrectly entered while commissioning (e.g. p0300 = 0, no motor)
- The braking resistor (p6811) has still not been parameterized - commissioning cannot be completed.
Fault value (r0949, interpret decimal):
The parameter number involved.
See also: p0300, p0301, p0304, p0305, p0307, p0310, p0311, p0314, p0316, p0320, p0322, p0323
Remedy: Compare the motor data with the rating plate data and if required, correct.
See also: p0300, p0301, p0304, p0305, p0307, p0310, p0311, p0314, p0316, p0320, p0322, p0323
F07967 Drive: Pole position identification internal fault
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: A fault has occurred during the pole position identification routine.
Only for internal Siemens troubleshooting.
Remedy: Carry out a POWER ON.
F07968 Drive: Lq-Ld measurement incorrect
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: A fault has occurred during the Lq-Ld measurement.
Fault value (r0949, interpret decimal):
10: Stage 1: The ratio between the measured current and zero current is too low.
12: Stage 1: The maximum current was exceeded.
15: Second harmonic too low.
16: Drive converter too small for the measuring technique.
17: Abort due to pulse inhibit.
Remedy: Re fault value = 10:
Check whether the motor is correctly connected.
Replace the power unit involved.
Deactivate technique (p1909).
Re fault value = 12:
Check whether motor data have been correctly entered.
Deactivate technique (p1909).
Re fault value = 16:
Deactivate technique (p1909).
Re fault value = 17:
Repeat technique.
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