Alarms, faults and system messages
10.6 List of alarms and faults
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF
241
Number Cause
Remedy
A07409
U/f control, current limiting control-
ler active
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.
F07413
Commutation angle incorrect (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.
F07426
Technology controller actual value
limited
•
Adapt the limits to the signal level (p2267, p2268).
•
Check the actual value scaling (p2264).
F07801
Motor overcurrent
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.
A07805
Drive: Power unit overload I2t
•
Reduce the continuous load.
•
Adapt the load cycle.
•
Check the assignment of rated currents of the motor and power unit.
F07806
Regenerative power limit exceeded Increase deceleration ramp.
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.
F07807
Short-circuit detected
•
Check the inverter connection on the motor side for any phase-phase
short-circuit.
•
Rule out that line and motor cables have been interchanged.
A07850
A07851
A07852
External alarm 1 … 3
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.
F07860
F07861
F07862
External fault 1 … 3
Remove the external causes for this fault.
F07900
Motor blocked
Check that the motor can run freely.
Check the torque limits (r1538 and r1539).
F07901
Motor overspeed
Check whether the motor is overloaded.