Siemens SINUMERIK 828D Function Manual page 143

Program code
...
; ALWAYS WHEN current position of the oscillating axis in the MCS == reversal position 1,
; THEN override of the oscillation axis = 0%, override of the infeed axis = 100%
; This cancels the previous synchronized action!
N630 ID=3 WHENEVER $AA_IM[Z]==$$SA_OSCILL_REVERSE_POS1[Z] DO
$AA_OVR[Z]=0 $AA_OVR[X]=100
...
; ALWAYS WHEN distance-to-go of the partial infeed == 0,
; THEN override of the oscillation axis = 100%
; This cancels the previous synchronized action!
N640 ID=4 WHENEVER $AA_DTEPW[X]==0 DO $AA_OVR[Z]=100 $AC_MARKER[0]=1 $AC_MARKER[1]=1
N650 ID=5 WHENEVER $AC_MARKER[0]==1 DO $AA_OVR[X]=0
N660 ID=6 WHENEVER $AC_MARKER[1]==1 DO $AA_OVR[X]=0
...
; WHEN current position of the oscillating axis in the WCS == reversal position 1,
; THEN override of the oscillation axis = 100%, override of the infeed axis = 0%
; This cancels the second synchronized action once!
N670 ID=7 WHEN $AA_IM[Z]==$$SA_OSCILL_REVERSE_POS1[Z]
DO $AA_OVR[Z]=100 $AA_OVR[X]=0
Synchronized actions
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
3.2 Reading and writing of SD/MD from synchronized actions
Examples
143