6.4  Communication with PLC Manufactured by Mitsubishi Electric Corporation (MELSEC protocol)
6.4.2  When the MP2300S Acts as Master (I/O message communication function is used)
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Built-in Ethernet Communications
The setting is finished for now. If necessary, transfer the settings to the PLC after setting all parameters. 
 Complement
Set up an initial setting and a router relay parameter below, if needed: 
• Initial setting
Set a timer relevant configuration when TCP is selected as a protocol. In most cases, accept the default. 
Set up if changes such as a shortened TCP retransmit timer are required. 
• Router relay parameter
Set up when you use a subnet mask pattern or gateway IP address. 
( 3 ) How to Start Communication
1. The MELSEC Q series starts to receive messages. 
The message receive operation starts automatically, so you are not required to do anything. 
2. The MP2300S side transmits messages.
When an I/O message communication function is used, the message transmit operation starts automatically, so 
you are not required to do anything.