Automatic Restart - Siemens Sinamics G120P Operating Instructions Manual

7.7.6

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 the motor
on 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.
Danger to life due to the automatic machine restart
When the "automatic restart" function is active (p1210 > 1), the motor automatically starts
after a power failure. The movements that the machine executes may result in death,
serious injury or material damage.
• Block the machine to prevent unintentional access.
• Before working on the machine switch the automatic restart mechanism off.
Setting the automatic restart
Proceed as follows to commission the automatic restart:
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
(Page 385).
Using p1210, select the automatic restart mode that best suits your application.
Figure 7-20 Selecting the automatic restart mode
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
WARNING
7.7 Application-specific functions
Functions
387