Siemens SIRIUS M200D Manual page 33

Soft run-down on motor starters with mechanical braking
In parallel with soft run-down, motor starters with mechanical braking offer the following
control options with the parameter "brake holding time on stopping":
● Brake holding time on stopping = 0:
Motor voltage V is reduced to the stopping voltage during the run-down time. Following
this, the motor voltage and the brake output are switched off simultaneously.
When soft run-down is terminated, the motor voltage and the brake output are switched
off simultaneously.
● Brake holding time on stopping > 0:
Motor voltage V is reduced to the stopping voltage during the run-down time and
switched off. The holding time also runs in parallel with the run-down time. On expiry of
the holding time, the brake output is switched off independently of the soft run-down.
The figure below shows the principle of the loaded motor:
Figure 3-3
You can find more information on the "Brake holding time on stopping" in the chapter
"Mechanical braking".
M200D AS-Interface Standard
Manual, 08/2014, A5E02548958A/RS-AA/004
Principle of soft run-down on motor starters with mechanical braking
Functions
3.5 Motor control
33