Siemens SINUMERIK 840Di sl Programming Manual page 107

Milling:
Note
The tool length components can be calculated according to the rotated working planes with
the functions for "Tool length compensation for orientable tools".
The offset plane is selected with CUT2D, CUT2DF. For further information on this and for the
description of the available calculation methods, refer to Section "Tool offsets"
The control provides convenient coordinate transformation functions for the spatial definition
of the working plane.
For further information, please refer to Section "Coordinate system offset".
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
3.7 Selection of working plane (G17 to G19)
Positional Data
107