Siemens SINUMERIK MC Commissioning Manual page 135

With braking ramp monitoring
(only without encoder)
● After the adjustable "delay time for the braking
● The converter switches from SBR to SLS as
Advantages:
● Already when braking, the converter detects as
● The feedback signal "SLS active" generally
The automatic reduction of the speed only takes effect when the ramp-function generator is
1)
interconnected to the speed setpoint limitation.
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
ramp", using the SBR (Safe Brake Ramp) func‐
tion, the converter monitors whether the veloc‐
ity decreases.
soon as one of the following two conditions is
fulfilled:
– The SBR monitoring ramp has reached the
value of the SLS monitoring.
This case is shown in the diagram above.
– After the actual velocity has reached the
value of the SLS monitoring threshold, the
system again waits for the "delay time for
braking ramp" until SLS becomes active.
to whether the load velocity decreases too
slowly.
comes earlier than without acceleration moni‐
toring.
Without braking ramp monitoring
1)
(with or without encoder)
● The converter monitors the load velocity after
Advantage:
● Commissioning is simplified, because instead
Safety functions integrated in the drive
the "delay time for SLS switchover" has ex‐
pired.
of the subfunction SBR or SAM of the alterna‐
tive brake ramp monitoring, you only have to
set the delay time.
4.10 SLS
135