AC500-eco Modbus TCP/IP slave

I am working on the project where I need to set an 10 AC500-eco PLCs as a server. Could you please provide any documents related on how to configure it.

Also, sample examples would be a big help. What functions block do we need in the program? I guess the function block "ETH_MOD_Mast" will be only for the client configuration. I have to write 10 words and read 10 words to and from the AC500 PLC. How is the modbus addressing done in PLC?

Need advise.

Thanks

RAD