Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual page 100

Application data
The application data expresses the following data code as binary code or ASCII code. Switch between the binary code and
ASCII code with "Own Node Settings" under "Basic Settings". ( Page 242 Own Node Settings)
■Format
• When exchanging data with binary codes
Communication
request source
Communication
request destination
• When exchanging data with ASCII codes
Communication
request source
Communication
request destination
■Subheader
The RJ71EN71 or the RnENCPU (network part) automatically adds and deletes the subheader, the setting is not required.
b7 b6 b5 b4 b3
0 1 1 0 0
1 FUNCTIONS
98
1.6 Communications Using the Random Access Buffer
Application data area
(command message)
2 bytes
2 bytes
Subheader Start address
H 00H L H
Application data area
(command message)
4 bytes
4 bytes
Subheader Start address
H L H - - L
30H 30H
b2 b1 b0
0 0 1
Only for command (not for response)
Command/response type
(When communications are performed using the random access
buffer, this format is used.)
For data read: 61H
For data write: 62H
Command/response flag
For command: 0
For response: 1
Maximum of
2 bytes
1017 words
Text
Data length (command)
setting (none at read
request)
L H
Maximum of
4 bytes
1016 words
Text
Data length (command)
setting (none at read
request)
H - - L
00H
Subheader End code
1 byte
1 byte
Application data area
(Response)
Subheader End code
H L H L
2 byte
2 byte
Application data area
(Response)
Text
(response)
(none at write
request)
Maximum of
1017 words
Text
(response)
(none at write
request)
Maximum of
1016 words