Deselecting Additive Work Offsets (Drfrof) - Siemens SINUMERIK 840D sl Programming Manual

Automatic channel axis exchange
If an axis that is active in another channel has been programmed for a CORROF, it will be fetched
into the channel with an axis exchange (requirement: MD30552 $MA_AUTO_GET_TYPE > 0)
and the position offset and/or the DRF offset deselected.
2.12.12

Deselecting additive work offsets (DRFROF)

The additive work offsets (DRF offsets) set via handwheel traversal are deselected via
the DRFOF procedure.
A preprocessing stop is initiated through the deselection and the position component of the
deselected DRF offset is transferred to the position in the basic coordinate system whereby no
axis is traversed. The value of the $AA_IM system variable (current MCS setpoint of an axis)
does not change; the value of the $AA_IW system variable (current WCS setpoint of an axis)
changes because it now contains the deselected component from the overlaid movement.
Syntax
DRFOF
Meaning
DRFOF:
Examples
Example 1: Axis-specific deselection of a DRF offset (1)
A DRF offset is generated in the X axis by DRF handwheel traversal. No DRF offsets are
operative for any other axes in the channel.
Program code
N10 CORROF(X,"DRF")
...
Example 2: Axis-specific deselection of a DRF offset (2)
A DRF offset is generated in the X and Y axes by DRF handwheel traversal. No DRF offsets are
operative for any other axes in the channel.
Program code
N10 CORROF(X,"DRF")
...
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Procedure for deselection of the DRF offsets for all active axes in the channel
Effective‐ Modal
ness:
Comment
; CORROF has the same effect as DRFOF here.
Comment
; Only the DRF offset of the X axis is deselected; the DRF
offset of the Y axis is retained (in the case of DRFOF both
offsets would have been deselected).
2.12 Coordinate transformations (frames)
Fundamentals
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