Siemens SIMATIC ET 200pro Series Operating Instructions Manual page 231

Number Cause
A07409 U/f control, current limiting control-
ler active
F07413 Commutation angle incorrect (pole
position identification)
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
A07850 External alarm 1 ... 3
A07851
A07852
F07860 External fault 1 ... 3
F07861
F07862
F07900 Motor blocked
F07901 Motor overspeed
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257324B AE
Remedy
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 pole position identification.
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 the motor regarding the 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.
•
The signal for "external alarm 1" has been triggered.
Parameters p2112, p2116 and p2117 determine the signal sources for
the external alarm 1... 3.
Remedy: Remove the causes of these alarms.
Remove the external causes for this fault.
Check that the motor can run freely.
Check the torque limits (r1538 and r1539).
Check whether the motor is overloaded.
Alarms, faults and system messages
10.6 List of alarms and faults
231