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10. COMMUNICATIONS IN THE BIDIRECTIONAL MODE
MELSEC-A
xample 2 Check sum disabled, in byte units (send data area allocation: default)]
To transmit character data "AJ71C24 [
1"
and integer data "123' (decimal) from the PC CPU to
3
computer after writing it to buffer memory. (AJ71C24 I/O address:
80
to
SF)
,
Send data length
XO
X80
Y9U
i
l+~Ykk-rj
ASC
I
AJ71C24[
]
I
Dl
/
f
L
OOH, 7 8 ,
/
(6)
Send
data
(3)
<quence
program
AJ71 C24
Data memory
Buffer memoly
.........
If
MlOO i s
ON,
error processing is executed
according to error code
stored in D100.
*Even if send data units are set to byte units, the TO instruction in a
sequence program operates in word units. Therefore, the length of
send data differs from the data length designated by the TO instruction.
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