HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual
Page 284
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 signalled 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.
Address
Function
Set
Reset
W260
Code for M-function
NC
Marker
Function Set
Reset
M2045
Strobe signal for M-function
NC
NC
M2482
Acknowledgement of M-function
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
.
.
.
.
.
.
M1999
Miscellaneous function M99
NC
NC
All M-functions over 99 are not transferred to the PLC but have a specific significance for the NC to
activate functions (see User's Manual).