Siemens SINAMICS G120 - F07967 Drive: Incorrect pole position identification; F07968 Drive: Lq-Ld measurement incorrect

4 Faults and alarms
4.2 List of faults and alarms
SINAMICS G120 Control Units CU240B-2/CU240E-2
844 List Manual (LH11), 01/2016, A5E33839529
For fault value = 1300:
- set the control mode (p1300) on the closed-loop speed control (p1300 = 20, 21).
For fault value = 1755:
- For encoderless closed-loop speed control (p1300 = 20) select the lowest speed value to be approached (p3820)
greater than the changeover speed of open-loop controlled operation (p1755).
- Re-calculate the speed points along the friction characteristic (p0340 = 5).
For fault value = 1910:
- Exit the motor data identification routine (p1910).
For fault value = 1960:
- Exit the speed controller optimization routine (p1960).
For fault value 3820 ... 3829:
- check the load at speed p382x.
- check the speed signal (r0063) for oscillation at speed p382x. Check the settings of the speed controller if
applicable.
For fault value = 3840:
- Make the friction characteristic error-free (p3820 ... p3829, p3830 ... p3839, p3840).
For fault value = 3845:
- Activate the friction characteristic record (p3845).
F07967 Drive: Incorrect pole position identification
Message class: Error in the parameterization / configuration / commissioning procedure (18)
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
Message class: Error in the parameterization / configuration / commissioning procedure (18)
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: For fault value = 10:
Check whether the motor is correctly connected.
Replace the power unit involved.
De-activate technique (p1909).
For fault value = 12:
Check whether motor data have been correctly entered.
De-activate technique (p1909).
For fault value = 16:
De-activate technique (p1909).
For fault value = 17:
Repeat technique.