Siemens SINAMICS S120 Function Manual page 57

Switching to a lower speed level
With braking ramp monitoring
(only without encoder)
•
•
The automatic reduction of the speed only takes effect when the ramp-function generator is inter-
1)
connected to the speed setpoint limitation.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Once the "delay time for braking ramp" has
elapsed, the converter monitors the motor ve-
locity using the function SBR (Safe Brake
Ramp).
The converter switches over from SBR moni-
toring to level 2 of SLS monitoring as soon as
one of the following conditions is fulfilled:
– The SBR monitoring ramp has reached
the value of the SLS monitoring.
This case is shown in the diagram above.
– The load velocity has decreased down to
the value SLS monitoring and the "delay
time for braking ramp" has expired.
Without braking ramp monitoring
1)
(with or without encoder)
•
Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
The converter monitors the velocity with the
lower SLS level after the "delay time for SLS
changeover" has expired (this is the same de-
lay time that applies after selecting the func-
tion SLS).
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