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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.8.7
Direct write to the extension file register (AnACPU dedicated command)
esignation Method
I
St.
NO.
:Station number
Designation in protocol
1
is shown below.
Extension file register
batch write command
I
To designate the device range, the following conditions must be met:
I
Character area C
I
e l
5
number of device points
5
64
I
computer
I
(Head device number)
+
(number of device points)
5
maximum device
number
1
esignation Example1
E
;
To write data to
3
points :
R8190
and
R8191
in extension file register block number
12
and
R O
in block number
13,
in station number '3'. Assume that extension file register
block number
9
does not exist. (Message wait time is
0
rnsec)
AJ71 C24
Designation of the device
range to be w i i e n
Indicates that:
J
The content to be written to R8190 of block Number 12 is 0123H
(291 in decimal)
The content to be written to RE191 of block Number 12 is AB07H
(-21753 i n decimal)
The content to be written to R O of block Number 13 is 3322H
(13090 in decimal)
I
ik,
H I L
I
PC
No.
1 device point uses 4 characters.
A
E
I
H I L
I
St.
NO.
$2
H I L
H l L
k;saa:
N
w
I
Therefore, a 1-word data is expressed
in 4 digits (hexadecimal).
I
I
I
I , I
I7
characters'
I
I
I
I
I
I
I
Sum
Check
'Ode
H I L
I
Number
d
device poinb
(Zsharacterr
lheradesiman)
H
I
L
I devics
point
user
4
characters.
Therefore,
a
I-word datsls expresred
in 4dighr (hexadnimall.
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