Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 454

Troubleshooting Faults and Alarms
11.5 Drive Faults and Alarms Motor/Output Related
Fault display
In torque limit
In torq limit rollback
Minimum speed trip
Loss of field current
452
Type Enable Potential causes and corrective actions
A SOP Cause
This alarm is issued when the drive is in speed rollback, due to a torque
limit condition, for more than 1 minute.
Action
1. Check load conditions.
2. Check proper settings for drive and motor ratings.
F/A SOP Cause
This fault or alarm, depending on the SOP, is issued when the drive is in
speed rollback, due to a torque limit condition, for more than 30 minutes.
Action
1. Check load conditions
2. Check proper settings for drive and motor ratings.
F/A SOP Cause
Motor speed is below the zero speed setting (2200). This is either due to
a motor stall condition, if speed demand is higher than the zero speed
setting, or a low speed demand condition, where speed demand is lower
than the zero speed setting.
Action
Increase motor torque limit (1190, 1210 or 1230) if it is a stall condition
or adjust the zero speed setting to avoid the desired low speed operating
region.
F/A SOP Cause
This occurs only with synchronous motor control due to field exciter failure
or loss of power to the exciter.
Action
Check if the power supply to the exciter is energized. To determine if the
field exciter is operating correctly:
• reduce Flux demand (3150) to 0.40, increase Accel time 1 (2270) to a
larger value and run the motor with 5% speed demand.
If the drive magnetizing current reference (I
then the field exciter is not working or is not adjusted properly.
) does not go to zero,
ds,ref
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