Terminology1.8.The following is a list of terms associated with COM600 that you should be familiarwith. The list contains terms that are unique to ABB or have a usage or definition thatis different from standard industry usage.DescriptionTermAn abnormal state of a condition.AlarmAn OPC service for providing information about alarms andevents to OPC clients.Alarms and Events; AEA physical device that behaves as its own communication nodein the network, for example, protection relay.DeviceChange of process data or an OPC internal value. Normally, anevent consists of value, quality, and timestamp.EventA physical IEC 61850 device that behaves as its own commu-nication node in the IEC 61850 protocol.Intelligent Electronic DeviceSeries of standards specifications aiming at open connectivityin industrial automation and the enterprise systems that supportindustry.OPCNamed data item.PropertyAbbreviations1.9.The following is a list of abbreviations associated with COM600 that you should befamiliar with. See also 1.8, Terminology.DescriptionAbbreviationAlarms and EventsAEData ObjectDOGateway, component connecting two communication networks togetherGWWeb Human Machine InterfaceWebHMIInternational Electrotechnical CommissionIECIntelligent Electronic DeviceIEDLocal Area NetworkLANStation Automation Builder 600SAB600Single Line DiagramSLD81MRS756705COM600 series 5.1Operator's Manual