Data Format; Header; Application Data - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Data format

This section describes the data format used during communications using the fixed buffer.
The communication data is configured of the header and application data.

Header

The header is for TCP/IP or UDP/IP. The RJ71EN71 or the RnENCPU (network part) automatically adds and deletes the
header, the setting is not required.
The contents of the header are shown below.
• TCP/IP
IP (20 bytes)
Ethernet (14 bytes)
• UDP/IP
Ethernet (14 bytes) IP (20 bytes)

Application data

If the communication procedure is "Fixed Buffer (No Procedure)", the application data expresses the following data code with
binary codes. Data is exchanged with binary codes regardless of the communication data code setting.
Text (command)
Maximum of 10238 bytes
TCP (20 bytes)
UDP (8 bytes)
1 FUNCTIONS
1.5 Communications Using the Fixed Buffer
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