8.29 Automatic restart
Overview
The automatic restart includes two dierent functions:
• The converter automatically acknowledges faults.
• After a fault occurs or after a power failure, the converter automatically switches-on the
motor again.
The converter interprets the following events as power failure:
• The converter signals fault F30003 (undervoltage in the DC link), after the converter line
voltage has been briey interrupted.
• All the converter power supplies have been interrupted and all the energy storage devices in
the converter have discharged to such a level that the converter electronics fail.
Function description
Setting the automatic restart function
WARNING
Unexpected machine motion caused by the active automatic restart function
When the "automatic restart" function is active (p1210 > 1), the motor automatically starts
after a line supply phase. Unexpected movement of machine parts can result in serious injury
and material damage.
• Block o hazardous areas within the machine to prevent inadvertent access.
If it is possible that the motor is still rotating for a longer period of time after a power failure
or after a fault, then you must also activate the "ying restart" function.
Flying restart – switching on while the motor is running (Page346)
Using p1210, select the automatic restart mode that best suits your application.
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Figure8-72 Automatic restart modes
Advanced commissioning
8.29Automatic restart
SINAMICS G120C Converters
348 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
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