6 – 280 HEIDENHAIN Technical Manual TNC 426, TNC 430
6.13.13 M Functions
In the TNC you can program miscellaneous functions, also known as
M functions. The code of an M function is transferred to the PLC before or
after execution of the NC block.
M89 to M299 are reserved for the NC, and several M functions between M00
and M88 have fixed meanings for the NC. The other M functions are freely
available.
Effective at A = beginning of block
E = end of block
M functions Meaning Effectiveness
M00 Program STOP/Spindle STOP/Coolant OFF E
M01 Optional program STOP E
M02 Program STOP/Spindle STOP/Coolant OFF/possible clearing of the
status display
a
/go to block 1
E
M03 Spindle ON clockwise A
M04 Spindle ON counterclockwise A
M05 Spindle STOP E
M06 Tool change/Program STOP
b
/Spindle STOP E
M07 A
M08 Coolant ON A
M09 Coolant OFF E
M10 E
M11 A
M12 E
M13 Spindle ON clockwise/Coolant ON A
M14 Spindle ON counterclockwise/Coolant ON A
M15 - M18 A
M19 E
M20 - M29 A
M30 Same as M02 E
M31 A
M32 - M35 E
M36 - M51 A
M52 - M54 E
M55 - M59 A
M60 E
M61 A
M62 A
M63 - M70 E
M71 - M88 A
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