Siemens SINAMICS V90 Operating Instructions Manual page 300

Diagnostics
12.1 List of faults and alarms
Alarm
A31412: Error bit set in the
serial protocol
Message class: Actual posi-
tion/speed value incorrect or
not available (11)
A52900: Failure during data
copying
Message class: General drive
fault (19)
A52901: Braking resistor
reaches alarm threshold
Message class: General drive
fault (19)
A52902: Emergency missing
Message class: General drive
fault (19)
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Cause
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.
Remedy
Carry out a POWER ON (power off/on) for
•
all components.
Check that the cables are routed in com-
•
pliance 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.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003