L
c
L-
PL
..-*
CI
C
c
c
8.
COMMUNICATIONS USING DEDICATED
PROTOCOLS
MELSEC-A
(1)
Commands and addresses
Commands and program addresses to read and write microcomputer
programs are explained
below:
(a)
ACPU
common commands
I1.m
SF-
Cod.
bo1
ASCII
Procoulng
Batch
128
bytss
road
I
Mdn
had6
microcomputer subprograms. SH, 52H
VR
Sub
Reads microcomputer main programs.
55H,
52H
UR
0
~~
~~___
Batch
write
128 bytss
Main
Writer microcomputer eubprogramr.
SH, 57H
VW
Sub
Writes microcomputer main programs. SSH, 57H
W
0
Note
:
o
........
Executable
x
........
Not executable
Durlng RUh
*
Writing during a program run may be executed if all the
following conditions are met:
1)
The
PC CPU
is
A3, A3N, A3H, A3M
or
A73.
2)
The program is not currently running program (indicates a sub-
program called by the main program, if the main program is
being run).
3)
The
PC
CPU
special relay is in the following state:
M9050
(signal flow conversion contact)
:
OFF
(A3CPU
only)
M9051
(CHG
instruction disable)
:
ON
(b) Microcomputer program address
Microcomputer addresses are designated
in
the protocol as fol-
lows:
1)
The range of addresses that can be set for each
PC CPU
is shown
in
the
table on the next page.
8-93
-
-.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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