HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 160)

160 7 Programming: Miscellaneous Functions
7.
1 Ent
er
ing Miscellaneous F
u
nctions M and S
T
OP
7.1 Entering Miscellaneous
Functions M and STOP
Fundamentals
With the TNC's miscellaneous functions—also called M functions—
you can affect:
„ Program run, e.g., a program interruption
„ Machine functions, such as switching spindle rotation and coolant
supply on and off
„ Contouring behavior of the tool
You can enter up to two M functions at the end of a positioning block
or in a separate block. The TNC displays the following dialog question:
Miscellaneous function M ?
You usually enter only the number of the M function in the
programming dialog. Some M functions can be programmed with
additional parameters. In this case, the dialog is continued for the
parameter input.
In the Manual Operation and Electronic Handwheel modes of
operation, the M functions are entered with the M soft key.
The machine tool builder may add some M functions that
are not described in this User’s Manual. Also, the machine
tool builder can change the meaning and effect of the M
functions described here. Refer to your machine manual.
Please note that some M functions become effective at
the start of a positioning block, and others at the end,
regardless of their position in the NC block.
M functions come into effect in the block in which they are
called.
Some M functions are effective only in the block in which
they are programmed. Unless the M function is only
effective blockwise, either you must cancel it in a
subsequent block with a separate M function, or it is
automatically canceled by the TNC at the end of the
program.