HEIDENHAIN TNC 620 (340 56x-02) Cycle programming - Manual (Page 270)

270 Cycles: Special Functions
12.3 PR
OGRAM CALL (Cy
c
le
12, DIN/ISO: G39)
12.3 PROGRAM CALL (Cycle 12,
DIN/ISO: G39)
Cycle function
Routines that you have programmed (such as special drilling cycles or
geometrical modules) can be written as main programs and then
called like fixed cycles.
Please note while programming:
0 BEGIN PGM
LOT31 MM
7 CYCL DEF 12.0
PGM CALL
8 CYCL DEF 12.1
LOT31
9 ... M99
END PGM
The program you are calling must be stored on the hard
disk of your TNC.
If the program you are defining to be a cycle is located in
the same directory as the program you are calling it from,
you need only to enter the program name.
If the program you are defining to be a cycle is not located
in the same directory as the program you are calling it
from, you must enter the complete path, for example
TNC:\KLAR35\FK1\50.H
.
If you want to define an ISO program to be a cycle, enter
the file type .I behind the program name.
As a rule, Q parameters are globally effective when called
with Cycle 12. So please note that changes to Q
parameters in the called program can also influence the
calling program.