Function "Synchronization, Hysteresis And Filtering N<Nx - Siemens Sinumerik 840D sl Function Manual

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 n<n
the function "n<n
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).
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.
6.6.2 Function "Synchronization, hysteresis and filtering n<n
As a result of actual value differences (2--encoder system) in the two monitoring
channels, static or dynamic differences can occur at the SGA "n<n
it very difficult to externally further process the signals. This is the reason that the
"n<n " signals of the two monitoring channels associated with the NCK and the
x
drive are synchronized before further processing.
In addition, a hysteresis is implemented to prevent the SGA "n
switching as a result of slight speed fluctuations around the threshold "n<n
actual value fluctuations, for example caused by mechanical vibration at the
machine, SGA "n<n
In order to be able to use the "Synchronization, hysteresis and filtering" function,
bit 16 must be set in machine data $MA_SAFE_FUNCTION_ENABLE. The speci-
fied 3 functions can only be enabled together. Further, the speed monitoring func-
tion n<n must always be activated by a value greater than 0.0
x
For 840 D sl:
MD36946 $MA_SAFE_VELO_X
for SINAMICS S120:
p9546 SI Motion SSM (SGA n<n
6-166
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
synchronization is active or selected. If only
x
is active, then a STOP F does not result in a subsequent STOP
x"
is used as a safety function, then at least one of the
x"
, then as a result of actual differences in the
x
x
" is kept stable by filtering the speed actual value.
x
) speed limit (CU)
x
" can have different states.
" from continually
x
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10/15
"
x
", which makes
x
". For
x