Siemens SINAMICS S120 Function Manual page 54

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
3. SLS monitors the absolute value of the current speed.
Note
SLS without selection
As an alternative to controlling via terminals and/or PROFIsafe, there is also the option to
parameterize the SLS function without selection. In this case, the SLS function is
permanently active after POWER ON. You will find details about this in Section "Safely-
Limited Speed without selection (Page 119)".
Selecting SLS when the motor is switched on
As soon as the converter detects the selection of SLS via a fail-safe input or via PROFIsafe
safe communication, the following happens:
● To avoid a limit value being violated, the setpoint limit can be transferred to the higher-
level motion controller (e.g. SIMOTION). The higher-level motion controller can then limit
the velocity setpoint.
● If the speed setpoint limitation is interconnected to the ramp-function generator, the
converter limits the speed to a value below the SLS monitoring.
● For SLS without encoder, you can select whether the converter monitors motor braking
using the function SBR (Safe Brake Ramp) or not. For SLS with encoder, the SBR
function cannot be selected.
52
The SLS setpoint limit can be transferred to the higher-level motion controller (e.g.
SIMOTION), where the speed setpoint can be limited.
In addition, you can configure the setpoint limit provided by SLS as maximum speed in
the ramp-function generator. In this case, SLS limits the speed setpoint.
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated