Siemens Sinumerik 840D sl Programming Manual page 360

Supplementary commands
15.5 Approaching a fixed point (G75)
Active frames
All active frames are ignored. Traversing is performed in the machine coordinate system.
Working area limitation in the workpiece coordinate system/SZS
Coordinate-system-specific working area limitation (WALCS0 ... WALCS10) is not effective in
the block with G75. The destination point is monitored as the starting point of the following
block.
Axis/Spindle movements with POSA/SPOSA
If programmed axes/spindles were previously traversed with POSA or SPOSA, these
movements will be completed first before the fixed point is approached.
Spindle functions in the G75 block
If the spindle is excluded from "fixed-point approach", then additional spindle functions (e.g.
positioning with SPOS/SPOSA) can be programmed in the G75.
Modulo axes
In the case of modulo axes, the fixed point is approached along the shortest distance.
References
For further information about "Fixed-point approach", see:
Function Manual, Extended Functions; Manual and Handwheel Travel (H1), Section: "Fixed-
point approach in JOG"
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Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals