Siemens SINUMERIK 840D sl Programming Manual page 265

Accordingly, two scenarios need to be distinguished where approach/retraction with KONT is
concerned:
1. The tool is located in front of the contour.
→ The approach/retract strategy is the same as with NORM.
2. The tool is located behind the contour.
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Fundamentals
2.10 Tool radius compensation
265