Siemens Sinamics CU240D-2 DP Operating Instructions Manual page 281

Number Cause
F07320 Automatic restart aborted
A07321 Automatic restart active
F07330 Search current measured too low
A07400 V controller active
DC_max
A07409 U/f control, current limiting control-
ler active
F07426 Technology controller actual value
limited
F07801 Motor overcurrent
A07805 Drive: Power unit overload I2t
F07806 Regenerative power limit exceeded Increase deceleration ramp.
F07807 Short circuit detected
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
Remedy
Increase the number of restart attempts (p1211). The actual number of
start attempts is shown in r1214.
Increase the wait time in p1212 and/or monitoring time in p1213.
Connect an 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 auto-
matically switched back on.
Increase search current (p1202), check motor connection.
If it is not desirable that the controller intervenes:
Increase the ramp-down times.
•
Deactivate the V
•
DC_max
= 0 for U/f control).
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.
•
Adapt the limits to the signal level (p2267, p2268).
•
Check the actual value scaling (p2264).
•
Check current limits (p0640).
Vector control: Check current controller (p1715, p1717).
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.
•
Reduce driving load.
Use power unit with higher energy recovery capability.
For vector control, the regenerative power limit in p1531 can be reduced
until the fault is no longer activated.
Check the inverter connection on the motor side for any phase-phase
•
short-circuit.
Rule out that line and motor cables have been interchanged.
•
Alarms, faults and system messages
8.6 List of alarms and faults
controller (p1240 = 0 for vector control, p1280
279