Siemens SIRIUS 3RW50 - 7.3 Soft stopping

Functions
7.3 Soft stopping
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
125
7.3 Soft stopping
Operating principle
A voltage ramp is used to implement a smooth ramp-down. With the "voltage ramp" stopping
function, the motor voltage is decreased along a linear, negative voltage ramp until the motor
stops.
Application
● Drives that abruptly come to a stop when switched off, thereby damaging the transported
goods.
● E.g. bottle filling plants
Voltage characteristic
t
1
... t
2
Stopping time
U
N
Line voltage
Parameter
Parameter
Description
Stopping time The length of the stopping 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.
The parameter value "0" causes the motor to be shut down immediately
without a down ramp.
• Factory setting: 0 s
• Setting range: 0 ... 20 s