Mitsubishi Electric MELSEC-L Series - Application Data

159
CHAPTER 13 COMMUNICATIONS USING A RANDOM ACCESS BUFFER
13
13.4 Data Format 13.4.2 Application data
13.4.2 Application data
In the application data for communications with the "Procedure Exist" control method, the following data code is
expressed in a binary code or an ASCII code. To switch between a binary code and an ASCII code, use the Ethernet
operation setting.
Project window [Parameter] [Network Parameter] [Ethernet/CC IE Field] Select
"Ethernet" under "Network Type". button
(1) Format
• Communications using a binary code
• Communications using an ASCII code
Subheader
2 bytes 2 bytes
Maximum of
1017 words
1 byte
1 byte
Application data area
(response)
Communication
request
destination
Communication
request
source
Application data area
(command message data)
Data length
setting
2 bytes
Tex t
(command)
(none at read
request)
Start address
Maximum of
1017 words
Subheader
End code
Tex t
(response)
(none at write
request)
H
00 H
LHLH
Subheader
4 bytes
Application data area
(command message)
4 bytes
Tex t
(command)
(none at read
request)
Maximum of
1016 words
2 bytes
2 bytes
Application data area
(response)
Communication
request source
Communication
request destination
Data length
setting
4 bytes
Start address
Maximum of
1016 words
Subheader
End code
Tex t
(response)
(none at write
request)
LH
-
-
H
L
30
H
30 H LH
-
-
HLHL