Safely-Limited Speed (Sls) - Siemens SINAMICS S210 Operating Instructions Manual

The control still enters the setpoint.
The response to "Deselect SOS" in the user program of the control must ensure that the control
brings the drive to a standstill within the delay time.
Drive can be forced out of the SOS position by mechanical forces
A drive under position control can be forced out of the "Safe Operating Stop" (SOS) position
by mechanical forces that are greater than the maximum torque of the drive. This unwanted
drive movement then triggers a Category 1 Stop function according to EN 60204-1 (fault
response function STOP B). The alarms for SS1 and STO must be observed.
● If there is a hazard due to unwanted motion in your application, take measures to counter
Note
Size of the tolerance window
The size of the tolerance window must be adapted to the respective application, otherwise the
standard monitoring functions will no longer be effective.
4.2.6

Safely-Limited Speed (SLS)

v
The SLS function prevents the parameterized maximum velocity from being exceeded. If the
permitted speed is exceeded, then the drive initiates a parameterizable stop response. It is
possible to switch between 4 different limit value levels in operation. Additionally, you can
specify variable limit values during operation via PROFIsafe.
Applications
SLS is suitable for machines susceptible to hazardous situations if a speed is exceeded and
wherever work must be performed directly on a machine, for example:
● During operation
● In setup mode
● For maintenance work
SINAMICS S210 servo drive system
Operating Instructions, 01/2019, A5E41702836B AC
WARNING
it, for example, by using a brake with safe monitoring. Additional information is provided in
Chapter "Safe Brake Control (SBC) (Page 84)".
Safety functions integrated in the drive
The drive with active SLS function monitors
speed/velocity of the motor to ensure that it
does not exceed the speed/velocity threshold
valid for the SLS (SLS monitoring).
t
4.2 Extended Functions
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