Siemens SINUMERIK 840D sl Programming Manual page 463

Note
Limitation of the speed of the overlaid interpolator using MD 32020: JOG_VELO for
IPO cycle 12 ms. Formula for speed:
. 0 120
0
Example
Subroutine: clearance control ON
%_N_AON_SPF
PROC AON
$AA_OFF_LIMIT[Z]=1
FCTDEF(1, -10, +10, 0, 0.6, 0.12)
ID=1 DO SYNFCT(1,$AA_OFF[Z],$A_INA[3])
ID=2 WHENEVER $AA_OFF_LIMIT[Z]<>0
DO $AA_OVR[X] = 0
RET
ENDPROC
Subroutine: clearance control OFF
%_N_AOFF_SPF
PROC AOFF
CANCEL(1)
CANCEL(2)
RET
ENDPROC
Main program
%_N_MAIN_MPF
AON
...
G1 X100 F1000
AOFF
M30
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
mm m
=
/ mV 0 6 .
6 . ms min
/ V
;Subroutine for clearance control ON
;Determine limiting value
;Polynomial definition
;Clearance control active
;Disable axis X when limit value is
;overshot
;Subroutine for clearance control OFF
;Cancel clearance control synchronized
;action
;Cancel limit range check
;Clearance control ON
;Clearance control OFF
Motion synchronous actions
10.4 Actions in synchronized actions
10-37