Siemens SINUMERIK 840Di sl Programming Manual page 236

Frames
6.3 Programmable zero offset
Note
You can use ATRANS to program a translation, which is to be added to existing frames.
Additive instruction, ATRANS X Y Z
Translation through the offset values programmed in the specified axis directions. The
currently set or last programmed zero point is used as the reference.
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Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals