Siemens SINUMERIK MC Commissioning Manual page 99

Monitoring modes
● For the Extended Functions with or without encoder, you can choose between 2 different
monitoring modes of the function SS1:
– Safe Brake Ramp (SBR)
– Safe Acceleration Monitor (SAM)
Brake ramp monitoring
(with or without encoder)
● Using the SBR (Safe Brake Ramp) function,
● The gradient of the SBR function can be set via
● The SBR function starts with the speed set‐
● If the converter detects that the speed has fall‐
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
the converter monitors whether the motor
speed decreases.
the reference velocity and the ramp-down time.
The SBR function only starts after the "Delay
for braking ramp".
point, which was present at the instant in time
that SS1 was selected.
en below the speed threshold (standstill moni‐
toring), it safely switches off the motor torque
(STO).
Safety functions integrated in the drive
Acceleration monitoring
(with or without encoder)
● The converter monitors the speed of the motor
with the SAM function.
● The converter prevents the motor from accel‐
erating again by having the monitoring function
continuously track the speed as it decreases.
● The converter reduces the monitoring thresh‐
old until the "Shutdown speed" has been
reached.
● The converter safely switches off the motor tor‐
que (STO), if one of the following conditions is
fulfilled:
– The speed has fallen below the shutdown
speed SS1.
– The maximum time until the torque is
switched off has expired.
4.3 SS1
99