MAXQ3183-RAN+ datasheet(51/102 Pages) MAXIM

51 / 102 page

Low-Power, Multifunction, Polyphase AFE

with Harmonics and Tamper Detect

______________________________________________________________________________________

Virtual Registers

The virtual registers are calculated values derived from one or more real registers. They are calculated at the time

they are requested, and thus could involve additional time to return a value. Most virtual registers are 8 bytes in

length and are delivered least significant byte first.

Power

Real Power, Phase X = A/B/C/T (PWRP.X) (A: 0x801, B: 0x802, C: 0x804, T: 0x807)

This signed register contains the real instantaneous power delivered into phase A/B/C or total. Power is calculated

from the instantaneous energy measurement according to the following equation:

The register is 8 bytes long, but the most significant 2 bytes are not used. See the PWR_CC register description for

more details.

Note that the sign bit is bit 47 for all 8-byte signed virtual registers.

Reactive Power, Phase X = A/B/C/T (PWRQ.X) (A: 0x811, B: 0x812, C: 0x814, T: 0x817)

This signed register contains the reactive instantaneous power delivered into phase A/B/C or total. Power is calculat-

ed from the instantaneous energy measurement according to the following equation:

The register is 8 bytes long, but the most signficant 2 bytes are not used. See the PWR_CC register description for

more details.

PWRQ X

X REA

PWR CC

×× 216

PWRP X

XACT

PWR CC

×× 216

Byte 7 (MSByte unused)

Byte 6 (unused)

Byte 5

Byte 4

Byte 3

Byte 2

Byte 1

Byte 0 (LSByte)

Byte 7 (MSByte unused)

Byte 6 (unused)

Byte 5

Byte 4

Byte 3

Byte 2

Byte 1

Byte 0 (LSByte)

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