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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.7.4
Batch write in units of bits
(a) Using the BW command (ACPU common command)
esignation Methodl
St. No. :Station number
Designation in protocol 1 is shown below.
1
To designate the device range, the following conditions must be met:
Batch read (bit) command
Character area
A
I
I
\I
1 1 1 1
I
I
. I
5
number of device points
5
160
Computer
I
(Head device number)
+
[(number of device points)
-
1 1 5
maximum
device number
lesignation Example1
To write data to 5 points from M903 to M907 in station "0".
(Message wait time is 0 msec)
Check sum is calculated within this range
AJ71
C24
Designation of device
range to be read
0 (30Hj indicates OFF,
St
NO.
H l L
M-ge
waittime
Designation to turn OFF
M906
Designation to turn ON
M907
and 1
(31H)
indicates ON.
PC
N ~ .
H I L
2
Computer
B W
I
Head device
i5chrvaners1
I l l 1
I
No
H I L
05"
3 0 ~ , ? &
46x,<6~
4 2 ~ , > 7 ~ Xb 4D"
,lOw
,
3%. ,]OH
, X M
Urn
,
3
5
~
~
~
~
,
UH,
31"
I?w,JSH
AJ71
C24
Designation to turn OFF
M903
Designation to turn ON
M904
Designation to turn ON
M905
E
N
o
Oats for
the
designated number
of device poinh
(chamsterntorthe
dssignahd number
ofde6cepoi"h)
Number of
device
win&
acharastern
(heradffiimaO
H
I
L
I
N a
H I L
I
chffik
cDde
O 5 F F B W
0
M
0
9
0
3
0
5
0
1
1
0
1
2
6
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