Programming: Deselecting Overlays Axis-Specifically (Corrof) - Siemens SINUMERIK 840D Function Manual

17.13.3.3

Programming: Deselecting overlays axis-specifically (CORROF)

The following axis-specific overlays (overrides) are deleted with the CORROF procedure:
● Additive work offsets (DRF offsets) set via handwheel traversal
● Position offsets programmed via the $AA_OFF system variable
A preprocessing stop is initiated through the deletion of an overlay (override) value and the
position component of the deselected overlaid movement is transferred to the position in the
basic coordinate system. Whereby, no axis is traversed.
The position value that can be read via the $AA_IM system variable (current MCS setpoint of
the axis) does not change in the machine coordinate system.
The position value that can be read via the $AA_IW system variable (current WCS setpoint of
the axis) changes in the workpiece coordinate system because it now contains the deselected
component of the overlaid movement.
Note
CORROF can be programmed in an NC program.
CORROF must not be programmed in a synchronized action.
Syntax
CORROF(<Axis>,"<String>"[,<Axis>,"<String>"])
Meaning
CORROF:
<Axis>:
<String>:
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Procedure for the deselection of the following offsets and overlays of an axis:
● DRF offset
● Position offsets ($AA_OFF)
Effective‐ Modal
ness:
Axis identifier (channel, geometry or machine axis identifier)
Data type: AXIS
Character string for the definition of the overlay type
Data type: BOOL
Value Meaning
DRF offset
DRF
Position offset ($AA_OFF)
AA_OFF
H1: Manual traversing
17.13 Use of handwheels in automatic mode
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