Drive: Commutation Angle Incorrect (Motor Model); Drive: Commutation Angle Incorrect (Pole Position Identification) - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
207412 <location>Drive: Commutation angle incorrect (motor model)
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
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 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 the motor model resulted in an excessively high
value (> 80 ° electrical).
1: -
VECTOR:
0: The comparison of the pole position angle from the encoder and the 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: - if the encoder mounting was changed - re-adjust the encoder.
- replace the defective motor encoder.
- correctly set the angular commutation offset (p0431).
- correctly set the motor stator resistance, cable resistance and motor-stator leakage inductance (p0350, p0352,
p0356).
- increase the changeover speed for the motor model (p1752). The monitoring is completely de-activated 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.
207413 <location>Drive: Commutation angle incorrect (pole position identification)
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: ENCODER (NONE, OFF2)
Acknowledge: IMMEDIATELY
Cause: An incorrect commutation angle was detected that can result in a positive coupling in the speed controller.
- within the pole position identification routine (p1982 = 2):
A difference of > 45° electrical to the encoder angle was determined.
- for VECTOR, within the encoder adjustment (p1990 = 2):
A difference of > 6 ° electrical to the encoder angle was determined.
Remedy: - correctly set the angular commutation offset (p0431).
- re-adjust the motor encoder after the encoder has been replaced.
- replace the defective motor encoder.
- check the pole position identification routine. If the pole position identification routine is not suitable for this motor
type, then disable the plausibility check (p1982 = 0).
648
Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms