Siemens SINUMERIK 840D sl Programming Manual page 745

Stop oscillation movement at the reversal point
The oscillation axis is stopped at the reversal point, the infeed motion starts at the same
time. The oscillating motion is continued when the infeed movement is complete.
At the same time, this synchronized action can be used to start the infeed movement if this
has been stopped by a previous synchronized action, which is still active.
The following instructions are obtained under the given assumptions (refer above):
Reversal range 1:
WHENEVER
$SA_IM[Z]==$SA_OSCIL
L_RESERVE_POS1[Z] DO
$AA_OVR[X] = 0 →
→ $AA_OVR[Z] = 100
Reversal range 2:
WHENEVER
$SA_IM[Z]==$SA_OSCIL
L_RESERVE_POS2[Z] DO
$AA_OVR[X] = 0 →
→ $AA_OVR[Z] = 100
Online evaluation of reversal point
If there is a main run variable coded with $$ on the right of the comparison, then the two
variables are evaluated and compared with one another continuously in the IPO cycle.
Note
Please refer to Section "Motion-synchronized actions" for more information.
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
11.2 Oscillation controlled by synchronized actions (OSCILL)
Whenever the actual position of the oscillating axis in the
MCS is the same as the reversal position 1, then set the axial
override of the oscillating axis to 0% and the axial override of
the infeed axis to 100%.
Whenever the actual position of the oscillating axis Z in the
MCS is the same as the reversal position 2, then set the axial
override of the oscillating axis X to 0% and the axial override
of the infeed axis to 100%.
Oscillation
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