Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Page 100

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4 DATA COMMUNICATION USING BIDIRECTIONAL PROTOCOL
4.2 Transmitting Data to Target Device
Send data arrangement
The following example shows an arrangement of the send data to be sent to the target device when storing it in the send area.
Ex.
When transmitting "ABCDEFG123"
ABCDEFG123
5
B
D
F
1
3
A
C
E
G
2
ENQ
ACK
06
H
(00 H )(05 H )
(42
H )(41 H )
(44
H )(43 H )
(46
H ) (45
H )
(31
H )(47 H )
(33
H )(32 H )
LHLH
05 H 00 H 41 H 42 H 43 H 44 H 45 H 46 H 47 H 31 H 32 H 33 H 77 H 02 H
C24
Transmission area
(buffer memory)
Transmission data
Transmission data
count designation
Sum
check
code
Data
length
(0005H)
Transmission data
designation
Receive data (response message)
Target device
(Normal completion)