The derived quality is the extension to IEC 61850-7-3. If the derived bit is set to 1,it indicates that there is no physical sensor within the system to determine thevalue, but the value is derived from a combination of values from other physicalsensors. Typically, I4 or U4 are derived if they are calculated as the sum of thethree phase quantities.The configured MU channel quality as described in IEC 61850-7-3 is available onLHMI. This can be viewed under Main Menu/Diagnostics/Merging units/MUX:XXXX/XX Quality.IEC16000074-1-en.vsdxIEC16000074 V1 EN-USFigure 329: Configured MU channel quality in LHMI18.5.7 Technical data SEMOD172233-1 v1SEMOD172236-2 v3Table 488:IEC/UCA 61850-9-2LE communication protocolFunctions ValueProtocol IEC/UCA 61850-9-2LECommunication speed for the IEDs 100BASE-FX18.6 LON communication protocol IP14420-1 v118.6.1 Functionality M11924-3 v6An optical network can be used within the substation automation system. Thisenables communication with the IED through the LON bus from the operator’sworkplace, from the control center and also from other terminals.LON communication protocol is specified in LonTalkProtocol SpecificationVersion 3 from Echelon Corporation and is designed for communication in controlnetworks. These networks are characterized by high speed for data transfer, shortmessages (few bytes), peer-to-peer communication, multiple communicationmedia, low maintenance, multivendor equipment, and low support costs. LonTalksupports the needs of applications that cover a range of requirements. The protocolSection 18 1MRK 505 394-UEN AStation communication678 Line differential protection RED650 2.2 IECTechnical manual
