MAXQ3181-RAN+ datasheet(45/84 Pages) MAXIM

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Low-Power, Active Energy, Polyphase AFE

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Energy Units Conversion Coefficient (ENR_CC) (0x01A)

This register contains the value by which the raw accumulated energy value in each phase is multiplied before being

presented to the virtual energy registers. The table below lists the raw energy accumulators and the corresponding

virtual registers.

To avoid significant conversion loss, ENR_LSB should be chosen such that ENR_CC is > 1000. Calculate the value

of ENR_CC according to the following formula:

ENR CC

ENR LSB

××

216

Bit:

Name:

Energy Units Conversion Coefficient High Byte

Reset:

0x00

Bit:

Name:

Energy Units Conversion Coefficient Low Byte

Reset:

0x01

DESCRIPTION

RAW

VIRTUAL

Real energy, phase A, positive direction

A.EAPOS

Real energy, phase A, reverse direction

A.EANEG

ENRP.A*

Real energy, phase B, positive direction

B.EAPOS

Real energy, phase B, reverse direction

B.EANEG

ENRP.B*

Real energy, phase C, positive direction

C.EAPOS

Real energy, phase C, reverse direction

C.EANEG

ENRP.C*

Real energy, total

—

ENRP.T

Apparent energy, phase A

A.ES

ENRS.A

Apparent energy, phase B

B.ES

ENRS.B

Apparent energy, phase C

C.ES

ENRS.C

Apparent energy, total

—

ENRS.T

These registers represent the algebraic sum of the positive and reverse energy in the two “raw” registers noted. Thus, the energy

returned in these virtual registers represents the net energy.

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