Siemens G130 List Manual page 1548

4 Faults and alarms
4.2 List of faults and alarms
F07412 Drive: Commutation angle incorrect (motor model)
Message value: %1
Message class: Actual position/speed value incorrect or not available (11)
Drive object: VECTOR_G
Component: None
Reaction: ENCODER (NONE, OFF2)
Acknowledge: IMMEDIATELY
Cause: An incorrect commutation angle was detected that can result in a positive coupling in the speed controller.
Possible causes:
- the phase sequence of the output phases for the motor is incorrect (e.g. the phases are interchanged).
- the motor encoder is incorrectly adjusted with respect to the magnet position.
- the motor encoder is damaged.
- the angular commutation offset is incorrectly set (p0431).
- data to calculate the motor model has been incorrectly set (p0356 (motor-stator leakage inductance) and/or p0350
(motor-stator resistance) and/or p0352 (cable resistance).
- the changeover speed for the motor model is too low (p1752). The monitoring function only becomes effective
above the changeover speed.
- pole position identification might have calculated an incorrect value when activated (p1982 = 1).
- the motor encoder speed signal is faulted.
- the control loop is instable due to incorrect parameterization.
Fault value (r0949, interpret decimal):
SERVO:
0: The comparison of the pole position angle from the encoder and motor model resulted in an excessively high value
(> 80 ° electrical).
1: -
VECTOR:
0: The comparison of the pole position angle from the encoder and motor model resulted in an excessively high value
(> 45 ° electrical).
1: The change in the speed signal from the motor encoder has changed by > p0492 within a current controller clock
cycle.
Remedy: - check the phase sequence for the motor, and if required, correct (wiring, p1820).
- if the encoder mounting was changed - re-adjust the encoder.
- replace the defective motor encoder.
- correctly set the angular commutation offset (p0431). If required, determine using p1990.
- correctly set the motor stator resistance, cable resistance and motor-stator leakage inductance (p0350, p0352,
p0356).
Calculate the cable resistance from the cross-section and length, check the inductance and stator resistance using
the motor data sheet, measure the stator resistance, e.g. using a multimeter - and if required, again identify the
values using the stationary motor data identification (p1910).
- increase the changeover speed for the motor model (p1752). The monitoring is completely deactivated for p1752 >
p1082 (maximum speed).
- with pole position identification activated (p1982 = 1) check the procedure for pole position identification (p1980)
and force a new pole position identification procedure by means of de-selection followed by selection (p1982 = 0 ->
1).
Note:
For High Dynamic Motors (1FK7xxx-7xxx), for applications with a higher current, if necessary, the monitoring should
be disabled.
1548
Propagation: GLOBAL
List Manual (LH2), 07/2016, A5E03263479A
SINAMICS G130/G150