21.7.4 Operation principle SEMOD55864-4 v7The Signal matrix for binary outputs (SMBO) function , see figure 368, receiveslogical signal from the IED configuration, which is transferring to the real(hardware) outputs, via the Signal Matrix Tool (SMT) or ACT. The inputs inSMBO are BO1 to BO10 and they, as well as the whole function block, can be tag-named. The name tags will appear in SMT as information which signals shall beconnected between physical IO and the SMBO.21.8 Signal matrix for analog inputs SMAI SEMOD55751-1 v221.8.1 Functionality SEMOD55744-4 v10Signal matrix for analog inputs (SMAI), also known as the preprocessor functionblock, analyses the connected four analog signals (three phases and neutral) andcalculates all relevant information from them like the phasor magnitude, phaseangle, frequency, true RMS value, harmonics, sequence components and so on.This information is then used by the respective functions connected to this SMAIblock in ACT (for example protection, measurement or monitoring functions).21.8.2 Function block SEMOD55766-1 v2SEMOD54868-4 v11SMAI1BLOCKDFTSPFCREVROT^GRP1L1^GRP1L2^GRP1L3^GRP1NSPFCOUTG1AI3PG1AI1G1AI2G1AI3G1AI4G1NIEC14000027-1-en.vsdIEC14000027 V1 EN-USFigure 369: SMAI1 function blockFigure 369 is an example of SMAI1:n in each of the three task time groups 1, 2 or3 where:• n=1–12 in task group 1• n=13–24 in task group 2• n=25–36 in task group 3The task time defines the execution repetition rate, and is 1, 3 or 8 respectively forthe three task time groups.Section 21 1MRK 505 394-UEN ABasic IED functions798 Line differential protection RED650 2.2 IECTechnical manual
