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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(3)
Parameter memory batch write (ACPU common command)
Designation Method]
St. No. :Station number
Parameter memory write command
I
Character area C
I
I
I
I
I
I
I
I
I I I I
I
I
I
Parameter
Parameter data
Sum
St.
PC
Message
head address
Byfe
length
Computer
2
N ~ . N ~ .
p ; ; : ; ; ; i : ; ; ; ~ ; ; ;
check
w
code
H l L
HlL
I
I
I I I
I
I I I I
I 1
H l L
I
I
AJ7I C24
Designation of the parameter
St.
PC
memory address range to be written
N O
NO.
Number of characters
=
(Byte length) x 2 .
I
I H I L ~ H I L
I
I-word data uses 2 characters.
Therefore, a I-byte data is expressed in 2
digits (hexadecimal).
PUIN I
the byte length, the following condition must be met:
1
5
byte length
5
128
esignation Example
/
To write 4-byte data to parameter memory addresses 5AOH to 5A3H of the PC CPU in
station
"0".
(Message wait time is 0 msec)
Check sum is calculated within this range
.
' ; i
I
I
I
'
I
I
1
"
1
'
1
1
1
"
"
"
'
1
AJ71C24
Indicates that:
Data "35H" is written to address 5AOH
Data "EOH" is written to address 5A1H
Data "A9H" is written to address 5A2H
Data "BCH" is written to address 5A3H
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