HEIDENHAIN TNC 306 Technical Manual - Manual (Page 114)

4-14
TNC 406/TNC 306 1 Machine axes 3/97
Software limit switch range 3
Activated by PLC: M2817 = 1, M2816 = 0
MP912.0 Software limit switch X+
MP912.1 Software limit switch Y+
MP912.2 Software limit switch Z+
MP912.3 Software limit switch 4+
MP912.4 * Software limit switch 5+
MP922.0 Software limit switch X–
MP922.1 Software limit switch Y–
MP922.2 Software limit switch Z–
MP922.3 Software limit switch 4–
MP922.4 * Software limit switch 5–
The markers M2816 and M2817 are used to define the software limit switch range.
M2816 M2817 Software limit switch range
0 0 Range 1 (MP910.X; MP920.X)
1 0 Range 2 (MP911.X; MP921.X)
0 1 Range 3 (MP912.X; MP922.X)
The change-over to the selected software limit switch range must be activated by the strobe-marker
M2824 by the PLC. This strobe-marker is reset by the NC after the change-over has been carried
out.
Set Reset
M2824 Activation of the software limit switch ranges PLC NC
If one of the software limit switches is reached, the error message "LIMIT SWITCH ..." appears and
the appropriate marker (M2624 to M2633) is set.
Marker Function Set Reset
M2624 Limit switch X+ NC NC
M2625 Limit switch X–
M2626 Limit switch Y+
M2627 Limit switch Y–
M2628 Limit switch Z+
M2629 Limit switch Z–
M2630 Limit switch 4+
M2631 Limit switch 4–
M2632* Limit switch 5+
M2633* Limit switch 5–
* 0nly TNC 406