Communication Structure - Mitsubishi Electric MELSEC-L SERIES Basic User Manual

10.2

Communication Structure

When a connected device sends a message to an E71 in the SLMP message format, the E71 performs the process
according to the message. During communications, a CPU module including the E71 operates as a server, and the
connected device (a personal computer or other terminals) operates as a client. Based on the request message
received from the client, the server (the E71) automatically sends an appropriate response message.
Ethernet
90
Server
E71
Request message
Header Subheader
Access
Command
destination
Response message
Header Subheader Response data
Client
Connected device