Automatic Switch-On - Siemens SINAMICS G120 Operating Instructions Manual

Table 8- 33
Parameter Description
p1201
p1202
p1203
8.7.4.2

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
The inverter interprets the following events as power failure:
● The inverter signals fault F30003 (DC-link undervoltage), as the line supply voltage of the
● The inverter power supply has failed for a long enough time so that the inverter has been
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Advanced settings
Flying restart enable signal source (factory setting 1)
Defines a control command, e.g. a digital input, through which the flying restart function
is enabled.
Flying restart search current (factory setting 100%)
Defines the search current with respect to the motor magnetizing current (r0331), which
flows in the motor while the flying restart function is being used.
Flying restart search speed factor (factory setting 100%)
The value influences the speed with which the output frequency is changed during the
flying restart. A higher value results in a longer search time.
If the converter does not find the motor, reduce the search speed (increase p1203).
motor again.
inverter has briefly failed.
switched-off.
WARNING
Injuries from the automated 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
serious injuries.
• Block the machine to prevent unintentional access.
• Before working on the machine switch the automatic restart mechanism off.
Setting functions
8.7 Application-specific functions
285