8.
COMMUNICATIONS
USING DEDICATED
PROTOCOLS
MELSEC-A
8.7.2
Batch
read
In
unb
of
btts
(a) Using the
BR
command (ACPU common commands)
>erlgnrtlon Method
I
St
No.
:
Stdon
number
Designation
in
protocol
1
is shown below.
Character
area
B
POINTI
I
I
I
To
designate the device range, the following conditions must be met:
0
1
5
number of device points
s
256
(setting
for
256
points is
OOH)
e
(Head device number)
+
[(number of device points)
-
11
I
maximum
device number
)erignation
Example
I
To read the data at
5
points from
X40
to
X44
in station
'5".
(Message wait time is
100
msec.) (Assume that
X40
and
X43
are
OFF
and
X41,
X42,
and
X44
are
ON.)
IIII
Computer
4
7
0
5
X
0
0
4
0
A
OSFFBR
$
Ctmck
wm
is
calculated
within
this
range
A
C
K
OSFF
a*
xno*J*Y.,Y*
all
4
q
3c
,
n.
xh
,
35*
s,,,&,~*~,Y.,Y)*
41"
X,,,~~~~,CII~.,U~
4
I
AJ7l
c24
Check
sum
is
calculatd
'tjs
T
&In"
o*
xh541(*(6*JD*I3I*I3l",&,JI"
01"
E7
T
11
0
1
OSFFO
E
within
this
range
X X
Indicates
that
X44
h
ON
Indicates
that
X43
k
OfF
Indicates
that
X42
h
ON
Indicates
thal
X41
is ON
Indicates that
X40
b
OFF
POINT/
1
The message wait time is designated in the range
of
0
to
150
msec in
units of
10
msec, using hexadecimal notation of
0
through
FH.
Therefore,
100
msec corresponds to "A".
I
I
I
c
8-28
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