Safe Speed Range Identification "N<Nx; Base Function "N<Nx - Siemens Sinumerik 840D sl Function Manual

Safety functions integrated in the system/drive
6.6 Safe speed range identification "n<nx"
6.6 Safe speed range identification "n<n
The safe speed range detection function "n<n
detect the speed range of a drive. The speed range detection is evaluated on a
user--for--user basis, e.g. in so much that a protective door can only be re--enabled
if a spindle that is running--down has fallen below a certain speed.
The status signal "n<n
monitoring channel compares the actual velocity with a velocity limit that can be
adjusted via machine data (MD36946 $MA_SAFE_VELO_X) -- and resulting from
this, the SGA "n<n
The result of this monitoring function is exchanged between the NCK and drive
monitoring channels and crosswise compared. In order that brief dynamic devia-
tions of the actual velocity between the monitoring channels does not result in an
error being initiated in the crosswise data comparison, a tolerance band is defined
in which the crosswise data comparison does not immediately result in the above
mentioned alarm. Alarm 27001 or 27106 is only output and the appropriate stop
response initiated when the velocity deviation between the two monitoring chan-
nels 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.
6.6.1 Base function "n<n
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
MD36901 $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
velocity drops below the set limit value, then SGA "n<n
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
" is generated through two channels. For this purpose, each
x
" is set or deleted.
x
x"
x
". This extension is described in detail in Chapter 6.6.2.
x
", the following speed monitoring is performed:
x
"
x
" (SGA "n<n ") is used to safely
x x
" is generally enabled.
" is possible by setting bit 16 in
x
" is deleted. If the absolute actual
x
" is set again.
x
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