Siemens SINAMICS G120 Operating Instructions Manual page 299

5. Check that the motor follows the setpoint.
6. If necessary, increase the voltage boost p1311 until the motor accelerates without problem.
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 can find more information about this function in the parameter list and in function diagram
6851 of 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.
After commissioning, depending on the motor power rating and the technological appli‐
cation p0501, the inverter sets p1310.
Starting current (voltage boost) when accelerating (factory setting 0%)
Provides additional torque when the motor accelerates.
After commissioning, depending on the motor power rating and the technological appli‐
cation p0501, the inverter sets p1311.
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
297