Siemens SINUMERIK 840D sl Function Manual page 839

NC language
The NC programming language allows asynchronous oscillation to be controlled from the
part program. The following functions allow asynchronous oscillation to be activated and
controlled as a function of NC program execution.
Note
If the setting data are directly written in the part program, then the data change takes effect
prematurely with respect to processing of the part program (at the preprocessing time). It is
possible to re-synchronize the part program and the oscillation function commands by
means of a preprocessing stop (STOPRE).
References:
/PA/ Programming Manual
1) Activate, deactivate oscillation:
● OS[oscillation axis] = 1; Activate oscillation for oscillation axis
● OS[oscillation axis] = 0; Deactivate oscillation for oscillation axis
2) End of oscillation:
● WAITP(oscillation axis)
3) Setting reversal points:
● OSP1[oscillation axis] = position of reversal point 1
● OSP2[oscillation axis] = position of reversal point 2
A position is entered into the appropriate setting data in synchronism with the block in the
main run and thus remains effective until the setting data is next changed.
If incremental traversal is active, then the position is calculated incrementally to the last
appropriate reversal point programmed in the NC program.
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Note
Every axis may be used as an oscillation axis.
Positioning axis command – stops block until oscillation axis is at fine stop and
synchronizes preprocessing and main run. The oscillation axis is entered as positioning
axis again and can then be used normally.
If an axis is to be used for oscillation, it must be released with a WAITP(axis) command
beforehand.
This also applies if oscillation is initiated from the PLC/HMI. In this case, the WAITP(axis)
call is also needed if the axis was programmed beforehand via the NC program. With SW
version 3.2 and higher it is possible to select via machine data $MA_AUTO_GET_TYPE,
whether WAITP() shall be performed with programming or automatically.
Note
WAITP effectively implements a time delay until the oscillation movement has been
executed. Termination of the movement can be initiated, for example, through a
programmed deactivation command in the NC program or via the PLC or HMI by means
of deletion of distance-to-go.
Oscillation (P5)
Asynchronous oscillation
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