Siemens SINAMICS G120 Operating Instructions Manual page 297

In applications with a high break loose torque, you must also increase parameter p1312 in
order to achieve a satisfactory motor response.
You have set the voltage boost.
❒
Parameter
p1310
p1311
p1312
You will find more information on this function in the parameter list and in function diagram
6301 in the List Manual.
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Description
Starting current (voltage boost) permanent (factory setting 50%)
Compensates for voltage drops caused by long motor cables and the ohmic losses in
the motor.
Starting current (voltage boost) when accelerating (factory setting 0%)
Provides additional torque when the motor accelerates.
Starting current (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").
Advanced commissioning
6.21 Motor control
295