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Faults and Alarms
List of faults and alarms
Cause:
The amplitude, phase or offset correction for track A or B is at the limit.
Amplitude error correction: Amplitude B / Amplitude A = 0.78 ... 1.27
Phase: <84 degrees or >96 degrees
SMC20: Offset correction: +/-140 mV
SMC10: Offset correction: +/-650 mV
Alarm value (r2124, hexadecimal):
xxx1: Minimum of the offset correction, track B
xxx2: Maximum of the offset correction, track B
xx1x: Minimum of the offset correction, track A
xx2x: Maximum of the offset correction, track A
x1xx: Minimum of the amplitude correction, track B/A
x2xx: Maximum of the amplitude correction, track B/A
1xxx: Minimum of the phase error correction
2xxx: Maximum of the phase error correction
Remedy:
- check mechanical mounting tolerances for encoders without their own bearings (e.g. toothed-wheel encoders).
- check the plug connections (also the transition resistance).
- check the encoder signals.
- replace the encoder or encoder cable.
Reaction upon F:
NONE (DCBRAKE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge
IMMEDIATELY
upon F:
Reaction upon N:
NONE
Acknowledge
NONE
upon N:
A32429 (F, N)
Encoder 2: Position difference, track C/D and A/B too large
Reaction:
NONE
Acknowledge:
NONE
Cause:
The error of track C/D is greater than +/-15 ° mechanical or +/-60 ° electrical.
One period of track C/D corresponds to 360 ° mechanical.
One period of the Hall signal corresponds to 360 ° electrical.
The monitoring responds if, for example, Hall sensors are connected as C/D equivalent with the incorrect rotational
sense or supply values that are not accurate enough.
Alarm value (r2124, decimal):
Measured deviation as mechanical angle (16 bits with sign, 182 dec corresponds to 1 °).
Remedy:
- track C or D not connected.
- correct the sense of rotation of a Hall sensor that may be connected as equivalent C/D track.
- check that the encoder cables are routed in compliance with EMC.
- check the adjustment of the Hall sensor.
Reaction upon F:
NONE (DCBRAKE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge
IMMEDIATELY
upon F:
Reaction upon N:
NONE
Acknowledge
NONE
upon N:
A32431 (F, N)
Encoder 2: Difference, absolute/incremental position too large
Reaction:
NONE
Acknowledge:
NONE
Cause:
When cyclically reading the absolute position, an excessively high difference to the incremental position was
detected.
Alarm value (r2124, decimal):
Deviation in quadrants (1 pulse = 4 quadrants).
Remedy:
- check that the encoder cables are routed in compliance with EMC.
- check the plug connections.
- replace the encoder or encoder cable.
- coding disk dirty or strong magnetic fields.
3-620
Siemens AG 2004 All Rights Reserved
SINAMICS G List Manual, Edition 12.2004
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