Australia Posted 21 Oct 2011 I do not know should you experienced any accomplishment with this Greg, but I've a very similiar trouble. My set up is: M340 connected to Connexium Ethernet Swap linked to EGX100 Gateway related by means of modbus serial Sepam Protection relay. I've published the ST https://modicon-m34040627.vidublog.com/21595704/getting-my-modicon-m580-to-work