Siemens SINUMERIK 840D sl Function Manual page 906

Z2: NC/PLC interface signals
19.3 Manual and Handwheel Travel (H1)
DB21, ...
DBX37.0-2 Contour handwheel active
Edge evaluation: No
Signal state 1 Feedback signal indicating which handwheel is active for the "Contour handwheel/path input using
handwheel".
The interface can be interpreted either bit or binary-coded. The specification is performed via:
MD11324 $MN_HANDWH_VDI_REPRESENTATION
Bit-coded: Maximum of three handwheels
Note
At any one time, the axis can only be assigned to one handwheel. If several interface signals are set
simultaneously, then the following priority applies: "Handwheel 1" before "handwheel 2" before
"handwheel 3"
Binary-coded: Maximum of six handwheels
Signal state 0 The "Contour handwheel/path input using handwheel" is not assigned to a handwheel.
Corresponding to ... DB21, ... DBX30.0-2 (handwheel assignment for contour handwheel)
906
Signal(s) updated: Cyclically
Number of the assigned handwheel
1
2
3
Number of the assigned handwheel
1
2
3
4
5
6
Bit 2
Bit 2
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Bit 1 Bit 0
0 0 1
0 1 0
1 0 0
Bit 1 Bit 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
Extended Functions