HEIDENHAIN TNC 640, User Manual, Page: 362 / 948

Subprograms and Program Section Repeats | Any desired NC program as subprogram
9
362
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Operating sequence
1 The control executes the NC program up to the block in which
another NC program is called with
CALL PGM
.
2 Then the control executes the called NC program up to the end
of program
3 The control then resumes executing the calling NC program
with the block after the program call
If you want to program variable program calls in
connection with string parameters, use the
SEL PGM
function.
Programming notes
The control does not require any labels to call any part program
The called NC program must not contain any
CALL PGM
call into
the calling NC program (an endless loop ensues)
The called NC program must not contain the miscellaneous
functions
M2
or
M30
. If you have defined subprograms with
labels in the called NC program, you can then replace M2 or
M30 with the
FN 9: If +0 EQU +0 GOTO LBL 99
jump function
If the called NC program contains the miscellaneous functions
M2
or
M30
, then the control displays a warning. The control
automatically clears the warning as soon as you select another NC
program.