Siemens SINUMERIK 840D sl Operating Manual page 202

Collision avoidance (only 840D sl)
9.1 Activate collision avoidance
Procedure
202
1. Select the "Machine" operating area.
2. Press the <AUTO> key.
3. Press the "Sim. rec." softkey.
4. Press the "Other views" and "Machine space" softkeys.
During simultaneous recording, an active machine model is displayed.
Operating Manual, 01/2015, 6FC5398-6AP40-5BA2
Universal