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CS5464
8.2.2 Instantaneous Current (I1, I2), Voltage (V1, V2), and Power (P1, P2)
Address: 1 ( I1 ), 2 ( V1 ), 3 ( P2 ), 7 ( I2 ), 8 ( V2 ), 9 ( P2 )
MSB
LSB
-(2 )
2
2
2
2
2
0
2
-1
2
-2
-3
-4
-5
-6
-7
.....
2 -17
2
-18
2
-19
2
-20
2
-21
2
-22
2 -23
I1 ( I2 ) and V1 ( V2 ) contain instantaneous current and voltage, respectively, which are multiplied to yield in-
stantaneous power, P1 ( P2 ). These are two's complement values in the range of -1.0 ? value ? 1.0, with the
binary point to the right of the MSB.
8.2.3 Active Power (P1 AVG , P2 AVG )
Address: 4 ( P1 AVG ), 10 ( P2 AVG )
MSB
LSB
-(2 0 )
2 -1
2 -2
2 -3
2 -4
2 -5
2 -6
2 -7
.....
2 -17
2 -18
2 -19
2 -20
2 -21
2 -22
2 -23
Instantaneous power is averaged over each low-rate interval ( N samples) to compute active power, P1 AVG
( P2 AVG ). These are two's complement values in the range of -1.0 ? value ? 1.0, with the binary point to the
right of the MSB.
8.2.4 RMS Current (I1 RMS , I2 RMS ) and Voltage (V1 RMS , V2 RMS )
Address: 5 ( I1 RMS ), 6 ( V1 RMS ), 11 ( I2 RMS ), 12 ( V2 RMS )
MSB
LSB
2 -1
2 -2
2 -3
2 -4
2 -5
2 -6
2 -7
2 -8
.....
2 -18
2 -19
2 -20
2 -21
2 -22
2 -23
2 -24
I1 RMS ( I2 RMS ) and V1 RMS ( V2 RMS ) contain the root mean square (RMS) values of I1 ( I2 ) and V1 ( V2 ), calcu-
lated each low-rate interval. These are unsigned values in the range of 0 ? value ? 1.0, with the binary point
to the left of the MSB.
8.2.5 Instantaneous Quadrature Power (Q1, Q2)
Address: 14 ( Q1 ), 17 ( Q2 )
MSB
LSB
-(2
0 )
2 -1
2 -2
2 -3
2 -4
2 -5
2 -6
2 -7
.....
2 -17
2 -18
2 -19
2 -20
2 -21
2 -22
2 -23
Instantaneous quadrature power, Q1 ( Q2 ), the product of voltage1 (voltage2) shifted 90 degrees and current1
(current2). These are two's complement values in the range of -1.0 ? value ? 1.0, with the binary point to the
right of the MSB.
8.2.6 Reactive Power (Q1 AVG , Q2 AVG )
Address: 13 ( Q1 AVG ), 16 ( Q2 AVG )
MSB
LSB
-(2 0 )
2 -1
2 -2
2 -3
2 -4
2 -5
2 -6
2 -7
.....
2 -17
2 -18
2 -19
2 -20
2 -21
2 -22
2 -23
Reactive power Q1 AVG ( Q2 AVG ) is Q1 ( Q2 ) averaged over every N samples. These are two's complement
values in the range of -1.0 ? value ? 1.0, with the binary point to the right of the MSB.
DS682F3
29
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