Download AJ71C24-S8 - User`s Manual

9. COMMUNICATIONS IN THE NO-PROTOCOL MODE
MELSEC-A
Ir
I
Ixample 2: Transmitting data In byte units (buffer memory allocation: default)
To write "AJ71C24[]%I?, LF by sequence program and transmit
it to an external device
((AJ71C24 VO addresses: 80 to SF)
Computer
pJ71c24
L
I
1
l
I
I
I
1
1
I
I
1
I
A IJ 17 I1 IC 12 14
i
c
Send completed
x80
Send
request
Y90
PC CPU
processing
(Program)
PC
Transmitted data
\
TO
/
CPU
program example
D3
RST
Y90
(5)
Send data
32H
UH
Sequence program
data memory
3H
4H
pJ/20H
c
34H
AJ71 C24
buffer memory
,
POINT\
Even if transmission data units are set byte units, the TO instruction in
a sequence program operates in word units. Therefore, the length of
send data differs from the data length set with the TO instruction.
9 - 18
.