Siemens 3RW51 Series Manual page 91

7.6 Soft Torque
Principle of operation of Soft Torque during starting
The Soft Torque function reduces the drive acceleration rate shortly before the motor
reaches its rated speed. This produces an almost linear speed curve. This helps to ensure
smooth movement of a conveyor belt, for example, and so prevent fragile goods on the belt
from tipping over.
①
②
③
3RW51 Soft Starter
Manual, 06/2019, A5E37108631002A/RS-AB/002
Torque without Soft Torque
Torque with Soft Torque
Torque with direct start
Functions
7.6 Soft Torque
91