Basic Function "N<Nx - Siemens SINUMERIK 840D sl Function Manual

the appropriate stop response initiated when the velocity deviation between the two monitoring
channels is so large that this tolerance is exceeded (this corresponds to the behavior for the
crosswise monitoring of the results to compare the actual position with the output cam
positions).
The machine data $MA_SAFE_VELO_X is subject to a crosswise data comparison.
The function can be deactivated by writing the value of 0.0 to MD $MA_SAFE_VELO_X.
7.6.1 Basic function "n<nx"
If a value greater than 0.0 is parameterized in machine data $MA_SAFE_VELO_X, then safe
speed range detection "n<n
An extension of the basic functionality "n< n
$MA_SAFE_FUNCTION_ENABLE "Synchronization, filtering and hysteresis "n<n
For the basic function "n<n
If the absolute actual velocity exceeds the limit value set in machine data
$MA_SAFE_VELO_X, then the SGA "n<n
below the set limit value, then SGA "n<n
MD36942 $MA_SAFE_POS_TOL is used as tolerance for the crosswise comparison. Alarm
27001 or 27106 is only output and the appropriate stop response initiated when the velocity
deviation between the two monitoring channels is so large that this tolerance is exceeded.
Figure 7-15
Defining n
x
The speed limit n
for 840D sl:
MD36946 $MA_SAFE_VELO_X
For SINAMICS S120:
p9546 SI Motion SSM (SGA n < n
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
" is generally enabled.
x
", the speed is monitored in the following way:
x
n<n value range
x
is defined using the following MD / following parameters:
x
) speed limit (CU)
x
Safety functions integrated in the system/drive
7.6 Safe speed range detection "n<nx"
" is possible by setting bit 16 in MD36901
x
" is deleted. If the absolute actual velocity drops
x
" is set again.
x
".
x
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