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APPENDICES
/MELSEC-A
4.2
AWHP
The system disk for use with the A2C
is
SW4GP-GPPA.
If the SW3GP-GPPA system disk is used for booting, follow the
instructions described below.
(1) CPU type
On the A6PHP booted with the SW3GP-GPPA 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
WYO
to WYlFF.
(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 interrupt counters cannot execute count processing with
main routine programs and subroutine programs.
(5)
Unusable devices
Since the A2C does not execute interrupt programs,
I
(inter-
rupt pointer)
is
not usable.
(6) Unusable instructions
The following instructions are not usable on the A2C.
(a)
PR
(ASCII print instruction)
(b)
EVDI
(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.)
(8)
Writing to EP-ROM impossible
It
is
impossible to prepare the
ROM
for ROM operation using
the A6WU (in the
ROM
mode).
It
is possible to prepare
two
ROMs
(even numbered addresses
and odd numbered addresses) for storage.
L
APP-13
IB
(NAI
662384
II
.. . .
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