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10. COMMUNICATIONS IN THE BIDIRECTIONAL MODE
MELSEC-A
(3)
Transmission program examples
:xample 1 Check sum enabled, in word units (buffer memory area allocation: default)
I
T o transmit "AJ71C24
(1"
from the PC CPU to a computer after writing it to buffer memory.
:AJ71C24
I 1 0
address: 80 to 9F)
A
C
K
Computer
~ 6 .
-
AJ71C24
E
8
8
,
N 0004H
A
J : 7
l : ~ 2 1 4 [ ] OlCOH
0
t
,
,
m.
ru.
,m.
u . , a . ~ a . , x . l ~ ~ , a . I ~ ~ , e ~
a.,or.
-~
\
\
Data area
Send request
Send completed
ASC
I
AJ71C24
[ I
I
D l
MOVP
I
K4
I *
Send instruction
I
TOP
I
H8
(
H O
I
W
1
K5
2
4
Send
Send data length
Address
00,.
04,
data
Sequence program
AJ71 C24
Data memory
Buffer memory
.........
B M I
W
is on, error processing is executed
according to error code stored in D l W.
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