HEIDENHAIN TNC 620 User Manual page 371

Effectiveness of miscellaneous functions
Please note that some miscellaneous functions become effective
at the start of a positioning block, and others at the end, regardless
of their position in the NC block.
Miscellaneous functions come into effect in the block in which they
are called.
Some miscellaneous functions are effective only in the block in
which they are programmed. Unless the miscellaneous 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.
If several M functions are programmed in one NC
block, then the execution sequence is as follows:
M functions taking effect at the start of the block
are executed before those taking effect at the end
of the block
If all M functions take effect at the start or end
of block, execution take place in the sequence
programmed
Entering a miscellaneous function in a STOP block
If you program a STOP block, the program run or test run is
interrupted at the block, e.g. for a tool inspection. You can also
enter an M (miscellaneous) function in a STOP block:
To program an interruption of program run, press
the STOP key
Enter a miscellaneous function M
Example NC blocks
87 STOP M6
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Enter miscellaneous functions M and STOP 10.1
10
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