Automatic Switch-On - Siemens SINAMICS G120 Operating Instructions Manual

Advanced commissioning
6.7 Application-specific functions
6.7.5

Automatic switch-on

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 has failed 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 in addition, you must activate the "flying restart" function, see Flying restart
– switching on while the motor is running (Page 256).
Using p1210, select the automatic restart mode that best suits your application.
Figure 6-38 Automatic restart modes
The principle of operation of the other parameters is explained in the following diagram and
in the table below.
258
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.
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB