21.7.4 Operation principle
SEMOD55864-4 v7
The Signal matrix for binary outputs (SMBO) function , see figure
368, receives
logical signal from the IED configuration, which is transferring to the real
(hardware) outputs, via the Signal Matrix Tool (SMT) or ACT. The inputs in
SMBO 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 be
connected between physical IO and the SMBO.
21.8 Signal matrix for analog inputs SMAI
SEMOD55751-1 v2
21.8.1 Functionality
SEMOD55744-4 v10
Signal matrix for analog inputs (SMAI), also known as the preprocessor function
block, analyses the connected four analog signals (three phases and neutral) and
calculates all relevant information from them like the phasor magnitude, phase
angle, frequency, true RMS value, harmonics, sequence components and so on.
This information is then used by the respective functions connected to this SMAI
block in ACT (for example protection, measurement or monitoring functions).
21.8.2 Function block
SEMOD55766-1 v2
SEMOD54868-4 v11
SMAI1
BLOCK
DFTSPFC
REVROT
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
G1AI3P
G1AI1
G1AI2
G1AI3
G1AI4
G1N
IEC14000027-1-en.vsd
IEC14000027 V1 EN-US
Figure 369: SMAI1 function block
Figure 369 is an example of SMAI1:n in each of the three task time groups 1, 2 or
3 where:
• n=1–12 in task group 1
• n=13–24 in task group 2
• n=25–36 in task group 3
The task time defines the execution repetition rate, and is 1, 3 or 8 respectively for
the three task time groups.
Section 21 1MRK 505 394-UEN A
Basic IED functions
798 Line differential protection RED650 2.2 IEC
Technical manual
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