Australia Posted 21 Oct 2011 I do not know in case you experienced any good results using this type of Greg, but I've a really similiar trouble. My set up is: M340 linked to Connexium Ethernet Change connected to EGX100 Gateway connected by way of modbus serial Sepam Defense relay. https://arthurvszio.blogofchange.com/23159538/not-known-factual-statements-about-modicon-m340