HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 239)

Any desired program as subprogram 8.4
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
239
8.4 Any desired program as subprogram
Operating sequence
If you want to program variable program calls in
connection with string parameters, use the SEL
PGM function.
1 The TNC executes the part program up to the block in which
another program is called with %.
2 Then the other program is run from beginning to end.
3 The TNC then resumes the first part program (i.e. the calling
program) with the block after the program call.
Programming notes
No labels are needed to call any program as a subprogram
The called program must not contain the miscellaneous
functions M2 or M30. If you have defined subprograms with
labels in the called program, you can then use M2 or M30 with
the
D09 P01 +0 P02 +0 P03 99 jump function to force a jump
over this program section
The called program must not contain a
% call into the calling
program, otherwise an infinite loop will result