8.
COMMUNICATIONS
USING
DEDICATED PROTOCOLS
MELSEGA
8.7
Device Memory Readwrite
8.7.1
Commands and device ranges
L
c
i
L
(1)
The
ACPU
common commands and device ranges used for device
memory read/write are described below.
(a)
ACPU
common commands
-
Number
of
Point8
Proees8.d
por
Com-
munk8tionr
256
points
32
worda
(51
2
points)
64
points
160
points
10
word8
(1
60
poi*)
64
points
mpoints
10
words
(160
poi*)
10
points
40
points.
20
words.
(320
points)
mpoints
-
-
-
Durint
STOP
-
0
RUN
sw22
OFF
-
1
Code
1
ASCli Processing Contents
item
-
Bit
units
WR
!
SH,S2li
1
Reads
bit
devices
(X,
Y,
M,
etc.) in units
of
16 points.
Reads
word
devi
(D,
R,
T,
C,
etc.) in
units
of
points.
Batch bad
word
units
-
Bit
units
-
Word
units
Writes
data
to
bit
devices
(X,
Y,
M,
etc.) in
.
Writes data
to
bit
devices
(X,
Y,
M.
etc.) in
SH,SH
writes
dah
to
word devices
(D,
R,
T,
C,
etc.) in units
of
points,
Batch Write
Bit
units
Wresets
bit
devices
(X,
Y,
M,
etc.) in
units
of
points
by
designating the
devii
and device numbers
at
random.
Wresets
bit
devices
(X,
Y,
M, etc.) in
units of 16 points
by
dwignating the
devices and device numbers
at
random.
Writes data
to
word devices
(D,
R,
T,
C,
etc.) in units of points
by
designating the
devices and device numbers
at
random.
~~~ ~~
~~_____
'..-
-
3
T&
m
Write)
Word
units
L
Bit
units
3
BM
42n9
4oH
monitored in units
of
points.
Sets
the
bit
devices
(X,
Y,
M,
etc.)
to
be
Sets
the
bit devices
(X,
Y,
M,
etc.)
to
be
monitored in units
of
16
points.
Sets
the
word devices
(D,
R,
T,
C,
etc.)
to
be monitored in units of points.
WM
57H,
4DH
Monitor
Data
Registration
Word
units
Bit
units
Monitors
the
devices registered for
monitoring.
Monitor
Word
units
-
Note
:
o
........
Executable
x
.........
Not executable
For
the number
of
processing points indicated by an asterisk
(*),
the number
is one half of the values indicated in the table for the input device
(x)
when
PC CPUs
other than the
A3H CPU, A2ACPU(S1),
and
A3ACPU
are used.
(See
*1
in
3.3.1
(l).)
'_
-
-.
L
8-22
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