Siemens SINAMICS G120 Operating Instructions Manual page 142

Functions
5.10 Technological functions
When the "automatic restart" function is active (P1210 > 1), a motor can restart
automatically once the power has been restored. This is particularly critical if it is incorrectly
assumed that the motors have been shut down after a long power failure.
For this reason, death, serious injury, or considerable material damage can occur if
personnel enters the working area of motors in this condition.
Commissioning the automatic restart
1. Parameterizing the automatic restart using P1210
2. Set the number of start attempts via P1211.
3. If, for an automatic restart, the inverter is to be connected to an already rotating motor,
4. Make sure that this functions properly.
Parameterizing the automatic restart
Table 5- 60
Parameter
s
P1210 =
P1211 =
P1200 =
142
WARNING
then the 'flying restart' function should also be activated using P1200.
Parameterizing the automatic restart
Automatic restart mode
0: Automatic restart locked
1: Fault acknowledgment after an ON command; P1211 locked (factory setting)
2: Automatic restart after a power failure; P1211 locked
3: Automatic restart after a line supply undervoltage or fault; P1211 enabled
4: Automatic restart after a line supply undervoltage; P1211 enabled
5: Automatic restart after a power failure and fault; P1211 locked
6: Automatic restart after a line supply undervoltage / failure or fault; P1211 locked
Number of automatic restart attempts [minimum 0 ... maximum 10]
3 (factory setting)
Flying restart (Page 139)
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA