17.9.3 Function block
SMAI_20_1
BLOCK
DFTSPFC
REVROT
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
IEC09000137-1-en.vsd
IEC09000137 V1 EN
Figure 306: SMAI_20_1 function block
SMAI_20_2
BLOCK
REVROT
^GRP2L1
^GRP2L2
^GRP2L3
^GRP2N
AI3P
AI1
AI2
AI3
AI4
AIN
IEC09000138-2-en.vsd
IEC09000138 V2 EN
Figure 307: SMAI_20_2 to SMAI_20_12 function block
Note that input and output signals on SMAI_20_2 to SMAI_20_12 are
the same except for input signals GRPxL1 to GRPxN where x is equal
to instance number (2 to 12).
17.9.4 Signals
Table 509: SMAI_20_1 Input signals
Name
Type Default Description
BLOCK BOOLEAN 0 Block group 1
DFTSPFC REAL 20.0 Number of samples per fundamental cycle used for
DFT calculation
REVROT BOOLEAN 0 Reverse rotation group 1
GRP1L1 STRING - First analog input used for phase L1 or L1-L2
quantity
GRP1L2 STRING - Second analog input used for phase L2 or L2-L3
quantity
GRP1L3 STRING - Third analog input used for phase L3 or L3-L1
quantity
GRP1N STRING - Fourth analog input used for residual or neutral
quantity
1MRK 502 048-UEN A Section 17
Basic IED functions
639
Technical manual