Siemens 3RW51 Series Manual page 88

Functions
7.3 Soft stopping
7.3 Soft stopping
Operating principle
A voltage ramp is used to implement soft stopping. With the ramp-based stopping function,
the motor voltage is decreased along a linear, negative voltage ramp.
t ... t
1
U
N
Parameters
Parameter
Ramp-down time
88
Ramp-down time
2
Line voltage
Description
The length of the ramp-down time defines the time within which the motor
voltage is reduced from line voltage to 0 V.
It may take longer for the motor to actually coast down to a standstill.
Manual, 06/2019, A5E37108631002A/RS-AB/002
3RW51 Soft Starter