Siemens SINUMERIK MC Commissioning Manual page 334

Diagnostics
7.7 Stop responses
.. SOS STOP A
Lowest SLS STOP A
priority
The SOS monitoring function remains active, although the fault response in the event of a fault can no longer be triggered
1)
because it is already present.
STOP B is the subsequent stop of STOP F, which is activated after a time that can be parameterized. STOP F alone does
2)
not have any effect; the active safety function is still present.
The SLS monitoring function remains active, although the fault response in the event of a fault can no longer be triggered
3)
because it is already present.
SLS remains active during the braking phase, after which the system switches to SOS.
4)
Explanation of the table
No overall priority is assigned in the individual safety functions. SOS remains active, for
example, even if STO is requested.
● The safety functions that cause the drive to decelerate (SS1, SS2) are specified from top to
bottom in descending order of priority.
● The stop responses arranged here from left to right in descending order of priority (STOP A-
F).
If a field contains two entries, the stop responses and safety functions have the same priority.
● 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 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.
334
STOP B SOS
1) 1)
STOP B STOP C
3) 3)
SOS STOP E/SOS
STOP D STOP E
4) 4)
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
STOP B
2)
STOP B
4) 2)