Mitsubishi Electric MELSEC-L Series - Data Format; Header

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13.4 Data Format
Communication data consists of a header and application data.
13.4.1 Header
The header for TCP/IP or UDP/IP is used. Because an E71 automatically adds and deletes a header, the user setting
is not required.
(1) Detailed header sizes
(a) TCP/IP
(b) UDP/IP
Ethernet
(14 bytes)
IP
(20 bytes)
TCP
(20 bytes)
Ethernet
(14 bytes)
IP
(20 bytes)
UDP
(8 bytes)