Siemens SINAMICS G120 Operating Instructions Manual page 379

Number Cause
A07400 DC link voltage maximum
controller active
F07403 Lower DC link voltage threshold
reached
F07404 DC link voltage monitoring V
A07409 U/f control, current limiting
controller active
F07412 Commutation angle incorrect
(motor model)
F07413 Commutation angle incorrect (pole
position identification)
F07426 Technology controller actual value
limited
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Remedy
If it is not desirable that the controller intervenes:
Increase the ramp-down time of the ramp-function generator (p1121,
•
p1135).
Deactivate the Vdc_max controller.
•
See also Section: Limiting the maximum DC link voltage (Page 258).
The DC link voltage monitoring is active (p1240 = 5, 6) and the lower
DC link voltage threshold (p1248) was reached in the "Operation" state.
Check the following:
Line voltage
•
Infeed
•
Reduce the lower DC link voltage threshold (p1248).
The DC link voltage monitoring p1284 has responded.
DCmax
Check the following:
Line voltage
•
Braking resistor
•
Device supply voltage (p210)
•
Increase the DC link voltage threshold (p1284).
The alarm automatically disappears after one of the following measures:
Increase the current limit (p0640).
•
Reduce the load.
•
Slow down the up ramp for the setpoint speed.
•
An incorrect commutation angle can result in positive feedback in the
speed controller.
Check the motor phase sequence (wiring, p1820).
Adjust the encoder.
Replace the encoder.
Carry out motor data identification.
Carry out pole position identification.
An incorrect commutation angle can result in positive feedback in the
speed controller.
Check the motor phase sequence (wiring, p1820).
Adjust the encoder.
Replace the encoder.
Carry out pole position identification.
Adapt the limits to the signal level (p2267, p2268).
•
Check the actual value scaling (p2264).
•
Alarms, faults and system messages
11.5 List of alarms and faults
379