Siemens Sinamics S120 Function Manual page 54

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
How does SSM function in detail?
Requirements
The safety function SSM cannot be selected or deselected using external control signals.
SSM is active when you have set a monitoring velocity > 0 for SSM .
E v aluating t he speed
The converter compares the load speed with the speed limit and signals if the limit value is
undershot to the high-level control.
P arameterizable hysteresis
The parameterizable hysteresis ensures that the SSM output signal does not jump between
the values "0" and "1" in the limit range.
Image 3-5
54
Time response of the safety function SSM (Safe Speed Monitor)
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated