Siemens Sinamics S120 Function Manual page 452

Appendix
A.3 Acceptance tests (recommendations)
Trace evaluation:
● SLS function with SLS level 2 is activated (see bits "SLS active", "active SLS level bit 0"
and "active SLS level bit 1")
● Drive is accelerated beyond the SLS limit (time axis from approx. -400 ms)
● Exceeding the limit is recognized (time axis 0 ms)
● Safety fault is initiated (time axis 0 ms; bit "internal event" is set to 0)
● Fault reaction STOP E (corresponds to selection SOS) is initiated (see bit "STOP E
active")
● The standstill position is only safely monitored (time axis 100 ms; see bit "SOS active")
after the transition time STOP E to SOS (p9553) has expired
● However, as the axis continues to rotate, the standstill tolerance window is violated (time
axis approx. 120 ms)
● STOP B is initiated (see bit "SS1 active")
● The drive is braked to a standstill
● Standstill is reached (time axis approx. 500 ms)
● STOP A (as follow-up response to STOP B) is activated (see bit "STO active"); at this
point the speed falls below the shutdown speed SS1 (p9560) (drops below the shutdown
speed SS1 before SS1 timer (p9556) has expired).
Not e
Time differences through internal c alculations
Small time differences (of the order of two to three safety cycles (here up to 36 ms)) are
caused by internal calculations and do not present a problem.
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Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated