Siemens Sinamics S120 Function Manual page 48

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
How does SLS function in detail?
Ov erview
1. The inverter recognizes the
selection of SLS via a fail-safe
input or via the PROFIsafe safe
communication.
2. SLS allows a motor to reduce its
possibly inadmissibly high speed
within a defined time.
3. SLS monitors the absolute value
of the actual velocity.
The SLS setpoint limit can be
transferred to the higher-level
motion controller (e.g.
SIMOTION), where the velocity
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.
Not e
S LS without s election
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 can find details about this in Section "Safely-
Limited Speed without selection (Page 105)".
S electing S LS 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.
48
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated