Siemens SINAMICS G120 Operating Instructions Manual page 271

Number Cause
F07801 Motor overcurrent
A07805 Drive: Power unit overload I2t
A07850 External alarm 1
F07901 Motor overspeed
F07902 Motor stalled
A07910 Motor overtemperature
A07920 Torque/speed too low
A07921 Torque/speed too high
A07922 Torque/speed out of tolerance
F07923 Torque/speed too low
F07924 Torque/speed too high
A07927 DC braking active
A07980 Rotary measurement activated
A07981 No enabling for rotary
measurement
A07991 Motor data identification activated Switch on the motor and identify the motor data.
SINAMICS G120C Inverter
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
Remedy
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.
•
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.
Activate precontrol of the speed limiting controller (p1401 bit 7 = 1).
Check whether the motor data has been parameterized correctly and
perform motor identification.
Check the current limits (p0640, r0067, r0289). If the current limits are too
low, the drive cannot be magnetized.
Check whether motor cables are disconnected during operation.
Check the motor load.
Check the motor's ambient temperature.
Check the KTY84 sensor.
The torque deviates from the torque/speed envelope curve.
Check the connection between the motor and the load.
•
Adapt the parameterization corresponding to the load.
•
Check the connection between the motor and the load.
•
Adapt the parameterization corresponding to the load.
•
Not required
Not required
Acknowledge pending faults.
Establish missing enables (see r00002, r0046).
Alarms, faults and system messages
10.4 List of alarms and faults
269