Siemens SINAMICS G120C Getting Started page 61

Number Cause
F07320 Automatic restart aborted
A07321 Automatic restart active
F07330 Search current measured too
low
A07400 V controller active
DC_max
A07409 V/f control current limiting
controller active
F07426 Technology controller actual
value limited
F07801 Motor overcurrent
A07805 Drive: Power unit overload I2t
F07807 Short circuit detected
A07850 External alarm 1
F07860 External fault 1
F07900 Motor blocked
SINAMICS G120C converter
Getting Started, 04/2014, FW V4.7, A5E34264105B AA
Remedy
Increase the number of restart attempts (p1211). The current number of
start attempts is shown in r1214.
Increase the wait time in p1212 and/or monitoring time in p1213.
Create ON command (p0840).
Increase the monitoring time of the power unit or switch off (p0857).
Reduce the wait time for resetting the fault counter p1213[1] so that fewer
faults are registered in the time interval.
Explanation: The automatic restart (AR) is active. During voltage recovery
and/or when remedying the causes of pending faults, the drive is
automatically switched back on.
Increase search current (P1202), check motor connection.
If the controller is not to intervene:
Increase the ramp-down times.
•
Deactivate the V
•
DC_max
for V/f control).
The alarm automatically disappears after one of the following measures:
Increase the current limit (p0640).
•
Reduce load.
•
Increase the ramp-up time to the speed setpoint.
•
Adapt the limits to the signal level (p2267, p2268).
•
Check the actual value scaling (p2264).
•
Check current limits (p0640).
U/f control: Check the current limiting controller (p1340 ... p1346).
Increase acceleration ramp (p1120) or reduce load.
Check motor and motor cables for short circuit and ground fault.
Check motor for star-delta connection and rating plate parameterization.
Check power unit / motor combination.
Select flying restart function (p1200) if switched to rotating motor.
Reduce the continuous load.
•
Adapt the load cycle.
•
Check the assignment of rated currents of the motor and power unit.
•
Check the converter connection on the motor side for any phase-phase
•
short-circuit.
Rule out that line and motor cables have been interchanged.
•
The signal for "external alarm 1" has been triggered.
Parameter p2112 defines the signal source of the external alarm.
Remedy: Rectify the cause of this alarm.
Remove the external causes for this fault.
Make sure that the motor can rotate freely.
•
Check the torque limit: r1538 for a positive direction of rotation; r1539 for
•
a negative direction of rotation.
5.1 List of alarms and faults
controller (p1240 = 0 for vector control, p1280 = 0
Fault rectification
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