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20 Custom Macro
171
Including only the interpolations, the sequence of executions will be
Of the numbers in brackets, the first and the second ones are the numbers of the programs and
block being executed, respectively.
Instruction G67 specified in block N14 will cancel the macro called in block N12 (O0003); the one
specified in block N15 will cancel the macro called in block N10 (O0002).
In the case of multiple calls of macros type G66.1, first the last specified macro will be called in
entering each block (treating the addresses of the particular block as arguments), then the previously
specified macro will be called, entering the blocks of that macro and treating them as arguments.
If another macro is called again from a macro, the levels of local variables will also increase with the
macro levels.
main program macro macro macro macro
level 0 level 1 level 2 level 3 level 4
O_____ O_____ O_____ O_____
G65 P G65 P G65 P G65 P
M99 M99 M99 M99
local variables
level 0 level 1 level 2 level 3 level 4
#1 #1 #1 #1 #1
: : : :
#33 #33 #33 #33 #33
When the first macro is called, the local variables of the main program will be stored (#1 through
#33), and the local variables at level 1 will assume the argument values specified in the call. If
another macro is called from the first level, the local variables of the first level will be stored (#1
through #33), and the local variables on the second level will assume the argument values specified
in the call. In the case of multiple call, the local variables of the previous level will be stored and the
local variables on the next level will assume the argument values specified in the call. In the case of
M99, returning from the called macro to the calling program, the local variables stored on the
previous level will be restored in the same states they were at the time of being stored during the call.
(1–11)
(1–13) (1–16) Level of call
))) Level 0
(2–20) (3–30) (3–31)
))) Level 1
(2–20) (2–20)
))) Level 2