Siemens SINAMICS G115D Operating Instructions Manual page 336

Alarms, faults and system messages
8.6 List of alarms and faults
Number Cause
A07321 Automatic restart active
F07330 Search current measured too low
A07352 Stop sensor not plausible
A07353 DC quantity control deactivated
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 Power unit overload I2t
F07807 Short circuit detected
A07850 External alarm 1 ... 3
A07851
A07852
F07860 External fault 1 ... 3
F07861
F07862
F07900 Motor blocked
F07901 Motor overspeed
F07902 Motor stalled
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Remedy
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.
• Check the BICO interconnections for the stop sensors.
• Check the sensors.
Optimize the DC quantity controller (Kp, Tn, bandwidth, PT2 filter).
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.
• Check the converter 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 the parameters of the "Motor blocked" message (p2175, p2177).
Activate precontrol of the speed limiting controller (p1401 bit 7 = 1).
Increase hysteresis for overspeed signal p2162.
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.
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
controller (p1240 = 0 for vector control, p1280
SINAMICS G115D distributed drive