Siemens SINUMERIK 840D sl Programming Manual page 306

Fundamentals
2.12 Coordinate transformations (frames)
Programmable frames
Sometimes it is useful or necessary within an NC program, to move the originally selected
workpiece coordinate system (or the "settable zero system") to another position and, if
required, to rotate it, mirror it and/or scale it. This can be achieved using programmable frames.
See Frame instructions (Page 307).
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Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming