port s1 can indeed be used for bacnet ms/tp integration. any vanilla lgr driver will support ms/tp on the s1 port. you will obviously need Eikon (or better yet, Logicbuilder) to create a program for the lgr that polls the data points on the ms/tp bus, Sitebuilder to associate the program to the controller, and proper permissions in WebCTRL to download the program to the lgr...