,
.I
.
c
.-
P
r
i
r
i.
L-
P
L.
P
P
c.
L
c
8.
COMMUNICATIONS
USING
DEDICATED
PROTOCOLS
7."
MELSEC-A
8.1
2.6
Commenl
mcnnroy
rsrdhvrite
(1)
Commands and addresses
Commands and comment data addresses to read and write comment
data are explained below.
(a) ACPU common commands
Command
stat.
of
PC
CPU
Numbw
o,
POilIt8
1t.m
Sym-
cob.
bd
ASCII
Prue.ulng
During RUN
Pr-d
por
Communlcm-
During
tlon
SWZI
sw22
STOP
ON
OFF
Batch
read
Reads from comment memory.
4BH, 52H
KR
Main
0
0
0
128
bytes
Writes to comment memory.
4BH, 57H
KW
dub
Batch
write
0
0
0
1
28
bytea
Note
:
o
........
Exocutable
x
........
Not executable
(b) Comment memory addresses
The area to store comment data is managed using relative addres-
ses from the head address
OOH.
For example, for
2K
bytes of parameter comments, the range
in
which the addresses may be specified for the head address
is
OOH
to
7FHH.
1)
Comment memory capacity is
64K
bytes
The comment data address range is determined by the
parameter setting.
2)
Comment memory addresses are designated
in
4-digit ASCH.
3)
A
character area error
06H
occurs if the following condition is
not met:
Head address
+
designated number
of
bytes
s
comment
memory capacity.
(0000
to
FFFF)
POINT/
It
is not possible to designate a particular device or device number when
reading or writing comment data.
Always read or write all data from address
OH.
0-
97
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