Siemens SINAMICS S120 Function Manual page 382

Maintenance
9.3 Safety faults
If a field contains two entries, the stop responses and safety functions have the same
priority. Explanation:
● STOP A corresponds to selecting STO
● STOP B corresponds to selecting SS1
● STOP C corresponds to selecting SS2
● STOP D corresponds to selecting SOS
● STOP E corresponds to selecting SOS (for additional activation of the standard
"Extended stop and retract (ESR)" function)
● When the SS2 function is active, STOP F results in subsequent STOP B. SS2 remains
active.
Examples for illustrating the information in the table:
● Safety function SS1 has just been selected. STOP A remains selected.
● By selecting a STOP with a higher priority, STOPs that are present with a lower priority
will be replaced. This means that when SS1 is selected (≙ STOP B), any STOPs C-F that
are present will be replaced.
● The SLS safety function is selected. This selection does not modify the function of STOP
A-D. A STOP F now triggers a STOP B because a safety function has been activated.
● Stop response, STOP C is selected. If the STO or SS1 safety functions are active, this
does not have any effect. If SS2 is active, this brake ramp is retained. If SOS is active,
SOS remains effective, which is also the end status of STOP C. When SLS is selected,
the drive is decelerated with STOP C.
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Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated