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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(3)
Parameter memory batch write (ACPU common command)
Designation in protocol 1 is shown below.
Parameter memoly write command
Character area
c .
.
I I i I I I I i
I I I I I I
I
I I I I I
St. No.
: Station number
Number of characters
=
(Byte length)
x
2.
I
I H I L I H I L I
1 word data uses 2 characters.
Therefore, a I -byte data is expressed in 2
digits (hexadecimal).
.,-,>
mal)
hexadecimal)
-
I
I H I L I H I L I
I
I
I I I I I I
I
I I
I
I
I I
H I L
POINT
To designate the byte length, the following condition must be met:
1
r
byte length s 128
A1 SJ71 C24
Designation of the parameter
memory address range to be written
A
Designation ~ x a m ~ l e l
To write 4-byte data to parameter memory addresses 5AOH to 5A3H of the AlSCPU.
(Message wait time is 0 msec)
I
St.
NO.
I
PC
NO.
Check sum is calculated within this range
.
Computer
At SJ71C24
A
indicates that:
K
Data ' 3 5 H is written to address 5AOH
Data 'EOH" is written to address 5A1 H
Data 'ASH' is written to address 5A2H
Data 'BCH" is written to address 5A3H
E
0
mn
N
o
o
l a . , &
(6*,M*
F F P w o
3 ~ ~ 5 1 ~
30*
0
0
5 A o o 4
wn.YIm,&,4i~,JOn
&,l&
I
I
,
3
s
l
~
o
~
~
s
l
~
c
o
s
~ ~ ~ ~ h l f 5 ~ , ~ 1 ~ ~ 4 l ~ , ~ 1 ~ ~ f ? ~ , t 3 ~
X I H ~ J P U
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