Siemens sinumerik 802d sl Operation And Programming Manual page 32

Turning On and Reference Point Approach
If you select the wrong approach direction, no motion is carried out.
Approach the reference points for each axis one after the other.
Quit the function by switching the mode (MDA, AUTOMATIC or JOG).
Note
"Reference point approach" is only possible in the Jog mode in the JOG REF window.
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
2-32
6FC5 398-3CP10-0BA0