Australia Posted 21 Oct 2011 I don't know when you experienced any accomplishment using this Greg, but I have a really similiar dilemma. My setup is: M340 linked to Connexium Ethernet Swap linked to EGX100 Gateway connected by using modbus serial Sepam Defense relay. I've published the ST in unity https://modicon-m34046790.creacionblog.com/14812867/not-known-factual-statements-about-modicon-m340