APPENDICES
--------------------
MELSEC-A
4.3
A6HGP
The system disk of current version is used
for
use with
the
A2C.
Follow
the
instructions described below.
(1) CPU type
On
the
A6HGP booted with the SW3-HGPA disk, set
the
CPU type as
"A2·.
(2) Program capacity
The
A2C
has
8K
steps
of
capacity
for
sequence
programs
and
microcomputer programs.
By parameter setting, program capacity less than 8K steps should be
set.
(3) Number of I/O points
The A2C has 512
input
and
output points from
X/YO
to XlY1FF.
I
(4) Interrupt programs and interrupt counters are unusable.
On the A2C, interrupt programs (I to IRET)
cannot
be executed.
Do not set interrupt counters using parameters. Counters set for inter-
t
rupt
counters
cannot
execute
count
processing
with main routine
programs and subroutine programs.
(5) Unusable devices
Since the A2C does not execute interrupt programs, I (interrupt pointer)
is
not
usable.
(6) Unusable instructions
The following instructions are not usable on
the
A2C.
(a) PR (ASCII print instruction)
(b) EI/DI (Interrupt program allow/disallow)
(c) IRET (Interrupt program return)
(7) Remote terminal setting
Remote terminal setting of the A2C is executed with
the
initial program
of
the
sequence program. (See Section 4.2.9
for
details of
the
initial
program.)
APP-24
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