Automatic Restart - Siemens sinamics G120 Operating Instructions Manual

Advanced commissioning
6.7 Application-specific functions
6.7.6

Automatic restart

The automatic restart includes two different functions:
● The inverter automatically acknowledges faults.
● After a fault occurs or after a power failure, the inverter automatically switches-on the
motor again.
The inverter interprets the following events as power failure:
● The inverter signals fault F30003 (DC-link undervoltage), as the line supply voltage of the
inverter has briefly failed.
● The inverter power supply fails for a long enough time so that the inverter has been
switched-off.
Setting the automatic restart function
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 "flying restart" function.
Using p1210, select the automatic restart mode that best suits your application.
Image 6-54 Automatic restart modes
The principle of operation of the other parameters is explained in the following diagram and
in the table below.
288
WARNING
Danger to life as a result of machine parts unexpectedly starting
When the "automatic restart" function is active (p1210 > 1), the motor automatically
starts after a power failure. Unexpected movement of machine parts can result in
serious injury and material damage.
• Block off hazardous areas within the machine to prevent inadvertent access.
Flying restart – switching on while the motor is running (Page 286)
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Converter with CU250S-2 Control Unit