Mitsubishi L02CPU User Manual page 60

When using the predefined protocol function, open setting in the Ethernet configuration window is not available.
Do not select the "Set Open Setting in Ethernet Configuration Window" checkbox in "Built-in Ethernet Port Setting" tab.
For the protocol setting method, refer to the following.
GX Works2 Version 1 Operating Manual (Intelligent Function Module)
58
8.
Create a program for starting data communications.
In the case of Active open, create the program in which
SP.SOCOPEN instruction is used to establish a
connection. ( Page 86, Section 7.4.1)
To activate the predefined protocol, the SP.ECPRTCL
instruction is used. (
9.
Write the program to the CPU module.
[Online] [Write to PLC]
10.
Execute the program written to the CPU module by
using the SP.ECPRTCL instruction.
Page 61, Section 6.4.1)