Siemens SINAMICS G120 Original Instructions Manual page 254

Setting functions
8.5 Motor control
You will find more information about this function in the parameter list and in function
diagram 6300 of the List Manual.
You have set the voltage boost.
Parameter
p1310
p1311
p1312
254
Description
Permanent voltage boost (factory setting: 50%)
Compensates voltage drops as a result of long motor cables and the ohmic losses in
the motor.
Voltage boost when accelerating (factory setting: 0%)
Provides additional torque when the motor accelerates.
Voltage boost when starting (factory setting: 0%)
Provides additional torque, however, only when the motor accelerates for the first time
after it has been switched on ("break loose torque").
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG