CS5464 datasheet(29/46 Pages) CIRRUS

29 / 46 page

CS5464

DS682PP1

6.1.2 Instantaneous Current (I, I2), Voltage (V, V2), and Power (P, P2) Registers

Address: 1 (I), 2 (V), 3 (P), 7 (I2), 8 (V2), 9 (P2)

I (I2) and V (V2)contain the instantaneous measured values for current and voltage, respectively. The instanta-

neous voltage (voltage 2) and current (current 2) samples are multiplied to obtain Instantaneous Power, P (P2).

The value is represented in two's complement notation and in the range of -1.0

≤ I, V, P < 1.0

(-1.0

≤ I2, V2, P2 < 1.0), with the binary point to the right of the MSB.

6.1.3 Active (Real) Power (PActive, P2Active) Registers

Address: 4 (PActive), 10 (P2Active)

The instantaneous power is averaged over each computation cycle (N conversions) to compute Active Power,

PActive (P2Active). The value will be within in the range of -1.0 ≤ PActive< 1.0 (-1.0 ≤ P2Active< 1.0). The value is rep-

resented in two's complement notation, with the binary point to the right of the MSB.

6.1.4 RMS Current (IRMS, I2RMS) & Voltage (VRMS, V2RMS) Registers

Address: 5 (IRMS), 6 (VRMS), 11 (I2RMS), 12 (V2RMS)

IRMS (I2RMS) and VRMS (V2RMS) contain the Root Mean Square (RMS) values of I (I2) and V (V2), calculated

each computation cycle. The value is represented in unsigned binary notation and in the range of

0.0

≤ IRMS,VRMS < 1.0 (0.0 ≤ I2RMS,V2RMS < 1.0), with the binary point to the left of the MSB.

6.1.5 Instantaneous Reactive Power (Q, Q2) Registers

Address: 14 (Q), 17 (Q2)

The Instantaneous Reactive Power (Q, Q2) is the product of the voltage (voltage 2) signal, shifted 90 degrees,

and the current (current 2) signal. The value is represented in two's complement notation and in the range of

-1.0

< Q < 1.0 (1.0 < Q2 < 1.0), with the binary point to the right of the MSB.

6.1.6 Average Reactive Power (QAvg, Q2Avg) Registers

Address: 13 (QAvg), 16 (Q2Avg)

The Average Reactive Power (QAVG, Q2AVG) is Q (Q2) averaged over N samples. The value is represented in

two's complement notation and in the range of -1.0

< QAVG < 1.0 (-1.0 < Q2AVG < 1.0), with the binary point to

the right of the MSB.

MSB

LSB

-(20)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

MSB

LSB

-(20)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

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

MSB

LSB

-(20)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

MSB

LSB

-(20)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

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