Technical Manual TNC 360 - heidenhain - DR. JOHANNES ...

The evaluation of the M function must be programmed in the PLC. When transferring an M function
to the PLC the code for the M function is stored in Word W260 and the strobe marker M2045 is set.
The execution of the M function must be signaled to the NC by setting the markers M2482. The
next NC block is only processed when the signal is acknowledged and the marker M2045 (strobe
signal for M function) is reset by the NC. The M functions M00 to M99 can also be decoded and
transferred to the markers M1900 to M1999. This function is activated by the marker M2496. The
decoded output is retained for reasons of compatibility. However, HEIDENHAIN recommends M
code evaluation using Word W260.
W260 Code for M function NC
Set Reset
Set Reset
M2045 Strobe signal for M function NC NC
M2482 Acknowledgment of M function, acknowledgment of PLC PLC
M2496 Enable marker for the decoded M code- PLC PLC
transfer to markers M1900 to M1999
M1900 Miscellaneous function M00 NC NC
M1901 Miscellaneous function M01 NC NC
M1902 Miscellaneous function M02 NC NC
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M1999 Miscellaneous function M99 NC NC
4-138 TNC 360 7 M Functions 8/95