DescriptionTermThe smallest part of a function that exchanges data. A LN is anobject defined by its data and methods.Logical Node; LNA communication protocol developed by Echelon.LONA proprietary method of ABB on top of the standard LON pro-tocol.LON Application Guideline forsubstation automation; LAGSeries of standards specifications aiming at open connectivityin industrial automation and the enterprise systems that supportindustry.OPCRepresentation of a connection to the data source within theOPC server. An OPC item is identified by a string