Siemens SINUMERIK 828D Function Manual page 26

Description of the Safety Integrated Extended Functions
3.6 Safely Limited Speed (SLS)
Note
As an alternative to control via terminals, there is also an option to parameterize the SLS
without selection function. In this case, the SLS function is permanently active after POWER
ON.
See also: SINAMICS S120 Safety Integrated Function Manual, Chapter: "Commissioning the
functions"
Selecting SLS when the motor is switched on
As soon as the inverter detects the selection of SLS via fail-safe input or via PROFIsafe , the
following happens:
If the setpoint velocity limit is interconnected to the ramp-function generator, then the inverter
limits the velocity to a value below the SLS monitoring threshold and brakes the motor with
the AUS3 ramp-down time.
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Function Manual, 07/2012, 6FC5397-3EP40-3BA0
Safety Integrated