Advanced commissioning
6.7 Application-specific functions
Converter with the CU240B-2 and CU240E-2 Control Units
300 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
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.
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.
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.
Flying restart – switching on while the motor is running (Page 298)
Using p1210, select the automatic restart mode that best suits your application.
Image 6-50 Automatic restart modes
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