ABB Relion 670 Series RES670, Technical Manual

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The task time defines the execution repetition rate, and is 1, 3 or 8 ms respectively for the
three task time groups.
SMAI2
BLOCK
REVROT
^GRP2_A
^GRP2_B
^GRP2_C
^GRP2_N G2AI3P
G2AI1
G2AI2
G2AI3
G2AI4
G2N
ANSI14000028-1-en.vsd
ANSI14000028 V1 EN
Figure 282: SMAI2 function block
Figure 282 is an example of SMAI2:n to SMAI12:m in each of the three task time groups
1, 2 or 3 where:
• n=2 and m=12 in task group 1
• n=14 and m=24 in task group 2
• n=26 and m=36 in task group 3
The task time defines the execution repetition rate, and is 3, 8 or 1 ms respectively for the
three task time groups.
20.15.3 Signals
Table 613: SMAI1 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
GRP1_A STRING - First analog input used for phase A or AB quantity
GRP1_B STRING - Second analog input used for phase B or BC quantity
GRP1_C STRING - Third analog input used for phase C or CA quantity
GRP1_N STRING - Fourth analog input used for residual or neutral quantity
Table 614: SMAI1 Output signals
Name Type Description
SPFCOUT REAL Number of samples per fundamental cycle from internal
DFT reference function
G1AI3P GROUP SIGNAL Group 1 analog input 3-phase group
G1AI1 GROUP SIGNAL Group 1 analog input 1
G1AI2 GROUP SIGNAL Group 1 analog input 2
Table continues on next page
Section 20
1MRK 511 365-UUS A
Basic IED functions
738 Phasor measurement unit RES670 2.1 ANSI
Technical manual