Example for use of GRP_OFF signal in FXDSIGNThe Restricted earth fault function REFPDIF can be used both for auto-transformers andnormal transformers.When used for auto-transformers, information from both windings parts, together with theneutral point current, needs to be available to the function. This means that three inputs areneeded.I3PW1CT1I3PW2CT1I3PREFPDIFIEC09000619_3_en.vsdIEC09000619 V3 EN-USFigure 77: REFPDIF function inputs for autotransformer applicationFor normal transformers only one winding and the neutral point is available. This means thatonly two inputs are used. Since all group connections are mandatory to be connected, the thirdinput needs to be connected to something, which is the GRP_OFF signal in FXDSIGN functionblock.I3PW1CT1I3PW2CT1I3PREFPDIFGRP_OFFFXDSIGNIEC09000620_3_en.vsdIEC09000620 V3 EN-USFigure 78: REFPDIF function inputs for normal transformer application11.7 Boolean 16 to Integer conversion B16I SEMOD175715-1 v111.7.1 IdentificationSEMOD175721-2 v2Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberBoolean 16 to integer conversion B16I - -11.7.2 Application SEMOD175832-4 v4Boolean 16 to integer conversion function B16I is used to transform a set of 16 binary (logical)signals into an integer. It can be used – for example, to connect logical output signals from aSection 11 1MRK 505 355-UEN ALogic190Application manual
