CS5464-IS【PDF 36/46 页】IC PWR/ENERGY METER 3CH 28-SSOP

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CS5464

8.3.9 Cycle Count (N) – Address: 19

MSB

LSB

2

2

2

2

2

2

2

2

2

2

0

22

21

20

19

18

2

17

2

16

.....

2 6

5

4

3

2

1

2 0

Default = 4000

Determines the number of output word rate (OWR) samples to use in calculating low-rate results. Cycle Count

( N ) is an integer in the range of 10 to 8,388,607. Values less than 10 should not be used.

8.3.10 Channel Select Level (Ichan level ) – Address: 18

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

Default = 1.02 (minimum difference = 2%)

Sets the hysteresis level for energy channel selection. If the most positive value of P1 AVG and P2 AVG ( I1 RMS

and I2 RMS ) is greater than Ichan LEVEL multiplied by the least-positive value, and is also greater than

Ichan MIN , the channel associated with the most-positive value will be used. If not, the previous channel

selection will remain . Ichan LEVEL is an unsigned fixed-point value in the range of 0 ? value ? 2.0, with the bi-

nary point to the left of the MSB. A value of 1.0 or less indicates no hysteresis will be used .

8.3.11 Channel Select Minimum Amplitude (E MIN or Irms MIN ) – Address: 24

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

Default = 0.003

Sets the minimum level for energy channel selection. If the most positive value of P1 AVG and P2 AVG ( I1 RMS and

I2 RMS ) is less than Ichan MIN then the previous channel selection will remain in use. It is a two's complement

value in the range of -1.0 ? value ? 1.0, with the binary point to the right of the MSB. Negative values are not

used.

8.3.12 Wideband Reactive Power (Q1 WB , Q2 WB )

Address: 20 ( Q1 WB ), 21 ( Q2 WB )

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

Wideband reactive power is calculated using vector subtraction. (See Section 4.8 Power and Energy Results

on page 16). The value is signed, but has a range of 0 ? value ? 1.0. The binary point is to the right of the MSB.

36

DS682F3

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