Compound Braking - Siemens MICROMASTER 420 Operating Instructions Manual

4 Using the MICROMASTER 420
4.3.2 OFF2
This command causes the motor to coast to a standstill.
NOTICE
The OFF2 command can have one or more sources. By default the OFF2
command is set to BOP/AOP. This source still exists even if other sources are
defined by one of the following parameters, P0700, P0701, P0702, P0703 and
P0704.
4.3.3 OFF3
An OFF3 command causes the motor to decelerate rapidly.
For starting the motor when OFF3 is set, the binary input has to be closed (high). If
OFF3 is high, the motor can be started and stopped by OFF1 or OFF2.
If OFF3 is low the motor cannot be started.
ramp down time:
NOTICE
OFF3 can be combined with DC braking or compound braking
4.3.4 DC braking
DC braking is possible together with OFF1 and OFF3. A DC current is applied to
stop the motor quickly and hold the shaft stationary until the end of the braking
period.
set DC braking:
set braking period: see P1233
set braking current: see P1232
NOTICE
If no digital input is set to DC braking and P1233 ≠ 0, DC braking will be active after
every OFF1 command.
4.3.5

Compound Braking

Compound Braking is possible with both OFF1 and OFF3. For Compound Braking
a DC component is added to the AC current.
set the braking current:
50
see P1135
see P0701 to P0704
see P1236
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
Issue 04/02