Siemens SINUMERIK 840D sl Series Diagnostics Manual page 692

Overview of Alarms
Cause: An incorrect commutation angle was detected, that can result in a positive coupling in the
speed controller. The comparison of the pole position angle from the encoder and the
motor model resulted in an excessively high value (> 80 ° electrical).
- 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.
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 leakage inductance, motor-stator resistance and cable
resistance (p0356, p0350, p0352).
- increase the changeover speed for the motor model (p1752).
207413 <location>Drive: Commutation angle incorrect (pole position
identification)
Reaction: OFF2 (ENCODER, NONE)
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).
207414 <location>Drive: Encoder serial number changed
Reaction: ENCODER (NONE, OFF2)
Acknowledge: IMMEDIATELY
Cause: The serial number of the motor encoder (e.g. EnDat encoder) of a synchronous motor has
changed.
Cause 1:
The motor with integrated and adjusted encoder was replaced.
Cause 2:
The encoder was replaced.
Cause 3:
A third-party, build-in or linear motor was re-commissioned.
Cause 4:
The firmware was updated to a version that checks the encoder serial number.
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005