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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(b) Using the JT command (AnACPU dedicated command)
?signation Method
/
St.
No.
:Station number
Designation in protocol 1 is shown below.
Test (random write, bit) command)
Character area C
\
(7characterr)
I
reset
(7 characters)
I rere!
1
character
0
(30H) indicates
OFF,
and
1 (31 H) indicates
ON.
I
To designate the device range, the following condition must be met:
(
. I
5
number of device points
2
20
esignation Example(
To write ON t o M50, OFF to B31A, and ON to Y2F in station "5".
(Message wait time is 0 msec)
Check sum is calculated within this range
.
B
o
o
o
3
1
A N 0
o . , B , ~ ~ ,
~ " , I L , ~ I W , ~ I - ;
+
AJ71
C24
/
Set
(ON)
/
Reset
(OFF)
Set
(ON)
K
M
o
o
o
o
s
0 1 1
4 ~ ~ , 3 ~ , 3 1 ~ , 3 " ,
N . , S " , ~ " : I I ~
Computer
a.
o
3
m .
,
3 : .
E
N
0
m.
O
~
F
F
J
T
O
~.,u.rs.,rs.r,,r.
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