Siemens Sinumerik 840D sl Function Manual page 170

Safety functions integrated in the system/drive
6.6 Safe speed range identification "n<nx"
Warning
!
A STOP F (displayed using Alarms 27001, 27101 and onwards or F01711) only
results in a subsequent STOP B/A response, if at least one of the safety--related
functions SBH, SG, SE, SN or synchronization, hysteresis and filtering "n<n
active or has been selected. If only the function "n<n
does not result in a subsequent STOP B/A response.
This means that if "n<n
SBH, SG, SE or SN functions must be active or selected (e.g. by selecting a high
SG stage).
6-170
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
is used as a safety function, then at least one of the
x"
is active, then a STOP F
x"
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10/15
" is
x