HEIDENHAIN TNC 335 Technical Manual - Manual (Page 113)

4-16
TNC 360 1 Machine Axes 8/95
MP912 Traverse range 3: Maximum value
MP922 Traverse range 3: Minimum value
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+
MP922.0 Software limit switch X–
MP922.1 Software limit switch Y–
MP922.2 Software limit switch Z–
MP922.3 Software limit switch 4–
The markers M2816 and M2817 are used to define the traverse range.
M2816 M2817 Traverse 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 traverse 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.
In the "Manual" and "Electronic handwheel" modes of operation this is done immediately, in all other
modes of operation it is usually done with the next M/S/T strobe. The range must be switched
during an M/S/T strobes.
Example:
M2045
M2482
M2824
In the Manual and Electronic Handwheel modes, the range can be switched immediately.
Set Reset
M2824 Activation of the selected traverse range PLC NC
(M2816/M2817)
If one of the software limit switches is reached, the error message "LIMIT SWITCH ..." appears and
the appropriate marker (M2624 to M2631) is set.