Siemens Sinumerik 840D sl Function Manual page 508

Data Description
8.6 Interface signals
SGA "n < n "
x
This SGA indicates whether the absolute value of the actual speed is above or
below a speed specified in the machine data.
SGA "n < n
Figure 8-2
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 n<n
the function "n < n
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 level).
Note
If the axis/spindle runs at a speed n
two monitoring channels, the SGA "n < n
This must be taken into account in the safe processing of the SGAs.
SG active, bits 0, 1
The SGAs "SG active bits 1, 0" display which safely reduced speed and therefore
which speed limit value is actively monitored. The SGAs are only updated if the
function "SBH/SG" is enabled and SG is active (SGE "SBH/SG deselection" = 0
and "SBH deselection" = 1).
8-508
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
n
n
x
1
"
x
0
Signal n < n , dependent on the speed characteristic
x
" is active, then a STOP F does not result in a subsequent
x
" is used as a safety function, then at least one of the
x
synchronization is active or selected. If only
x
, then as a result of actual differences in the
x
" can have different states.
x
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