Sls - Siemens SINUMERIK MC Commissioning Manual

4.10

SLS

Definition according to EN 61800-5-2:
"The SLS function prevents the motor from
exceeding the specified speed limit."
Examples of how the function can be used
Example
After opening a protective door, the machine opera‐
tor must enter the machine and in the hazardous
zone, operate a horizontal conveyor belt running at a
slow speed using an acknowledgment button.
A spindle drive, depending on the selection of the
cutting tool, must not exceed a specific maximum
velocity.
How does SLS function in detail?
Overview
1. The inverter recognizes the
selection of SLS via a failsafe
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 F-PLC,
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.
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
Safety functions integrated in the drive
SLS
Select SLS
Possible solution
● Select SLS in the converter via a fail-safe
input or PROFIsafe .
● The converter limits and monitors the veloci‐
ty of the horizontal conveyor.
● Select SLS and the corresponding SLSlevel
in the converter via PROFIsafe.
4.10 SLS
133