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2.14
MACROPROGRAM
(G65,
G66,
G67)*
A
set
of instructions is
provided
for this
system.
By
using these
instructions,
the tool machine manufacturers
or
the
users
of the
system
can produce a
program to
implement their original
functions.
This
program
is
called
a macroprogram,
which
can
be called and executed
by
a
single-block
command
using
G65
or
G66.
A
macroprogram
makes the
following possible:
(T>
Variables
can be
used.
Arithmetic
operations using
variables and
constants are possible.
<3>
Branch or
repeat
control is
possible.
f-11
Messages
and
dates
can
be
output.
Argument specification
is
possible.
Therefore,
macroprogram
permits creating a program
to execute
complex
arithmetic
operations or operations requiring
conditional
judgment. The
differences between
a macroprogram
and
subprogram
are as
follows:
(1)
Although
macroprogram
call
(G65,
G661
can specify an
argument,
subprogram
call
(M98) cannot
specify an
argument.
(2)
When
a
M98 block contains
any
command other than P, Q,
or L,
control
jumps
to
a
subprogram
after
it
is executed. On
the
other
hand,
any
command other than P
or
L in G65 and G66 is assumed
to
be
argument
specification, so
that control
immediately jumps
to
a macroprogram.
(3)
Local variables.used in
a macroprogram
have levels
corresponding
to
the level of -that
macroprogram.
Local variables used in
a
subprogram
have levels
which
are unchanged.
That
is.
local
variables in
a
macroprogram
are
different before and after the
macroprogram
is
called:
local variables in
a subprogram are
the
same.
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240
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