Siemens SINAMICS V90 Operating Instructions Manual page 334

Diagnostics
11.2 List of faults and alarms
Alarm
A30031: Hardware current
limiting in phase U
A31411: Absolute encoder
signals internal alarms
A31412: Error bit set in the
serial protocol
A52900: Failure during data
copying
A52901: Braking resistor
reaches alarm threshold
A52902: Emergency missing
A52932: PTO max limit
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Cause
Hardware current limit for phase U re-
sponded. The pulsing in this phase is in-
hibited for one pulse period.
Closed-loop control is incorrectly pa-
•
rameterized.
Fault in the motor or in the power ca-
•
bles.
The power cables exceed the maxi-
•
mum permissible length.
Motor load too high.
•
Power unit defective.
•
Note:
Alarm A30031 is always output if, for a
Power Module, the hardware current limit-
ing of phase U, V or W responds.
The absolute encoder fault word includes
alarm bits that have been set.
The encoder sends a set error bit via the
serial protocol.
Copying is halted.
•
The micro SD card/SD card was
•
plugged out.
The drive is not in the stop state.
•
The heat capacity reaches the threshold
(p29005) of the braking resistor capacity.
Implement servo on when the emergency
input (EMGS) is switched off.
For incremental encoder, when PTO fre-
quency exceeds 280K, drive will output
A52932 to remind that exceed limitation.
For absolute encoder, when PTO frequen-
cy exceeds 120K, drive will output A52932
to remind that exceed limitation.
Remedy
Check the motor data. As an alternative, run
a motor data identification.
Check the motor circuit configuration
•
(star-delta)
Check the motor load.
•
Check the power cable connections.
•
Check the power cables for short-circuit or
•
ground fault.
Check the length of the power cables.
•
Replace the encoder.
Carry out a POWER ON (power off/on) for
•
all components.
Check that the encoder cables are routed
•
in compliance with EMC.
Check the plug connections.
•
Replace the encoder.
•
Re-plug in the micro SD card/SD card.
•
Make sure the drive is in the stop state.
•
Change the external braking resistor.
•
Increase deceleration time.
•
Switch on the emergency input (EMGS) and
then implement servo on.
Change PTO ratio.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884