Siemens SINUMERIK MC - Page 137

Switching to a lower speed level
With braking ramp monitoring
1)
(only without encoder)
Without braking ramp monitoring
(with or without encoder)
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6/6
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● 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.
● 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 function
SLS).
1)
The automatic reduction of the speed only takes effect when the ramp-function generator is
interconnected to the speed setpoint limitation.
Switching to a higher speed level
If you switch over from a lower to a higher speed level, the converter immediately monitors the
actual velocity against the higher velocity.
Safety functions integrated in the drive
4.10 SLS
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB 137