IEC09000695_2_en.vsdIEC09000695 V2 EN-USFigure 93: Example designation, serial execution number and cycle time forlogic functionThe execution of different function blocks within the same cycle is determined bythe order of their serial execution numbers. Always remember this whenconnecting two or more logical function blocks in series.Always be careful when connecting function blocks with a fastcycle time to function blocks with a slow cycle time.Remember to design the logic circuits carefully and always checkthe execution sequence for different functions. In other cases,additional time delays must be introduced into the logic schemes toprevent errors, for example, race between functions.12.7 Fixed signal function block FXDSIGN IP15080-1 v212.7.1 IdentificationSEMOD167904-2 v2Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberFixed signals FXDSIGN - -12.7.2 Application M15322-3 v12The Fixed signals function (FXDSIGN) has nine pre-set (fixed) signals that can beused in the configuration of an IED, either for forcing the unused inputs in otherfunction blocks to a certain level/value, or for creating certain logic. Boolean,integer, floating point, string types of signals are available.One FXDSIGN function block is included in all IEDs.1MRK 504 169-UEN A Section 12LogicTransformer protection RET650 2.2 IEC 255Application manual
