Australia Posted 21 Oct 2011 I do not know in case you had any achievement with this Greg, but I've an extremely similiar difficulty. My setup is: M340 connected to Connexium Ethernet Change linked to EGX100 Gateway related via modbus serial Sepam Safety relay. I've prepared the ST in unity https://edwintrmex.timeblog.net/51076866/5-simple-techniques-for-modicon-m580