ATM90E32AS-AU-R datasheet(14/84 Pages) ATMEL

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M90E32AS [Datasheet]

Atmel-46003B-SE-M90E32AS-Datasheet_02122015

3.5.3

ENERGY PULSE OUTPUT

CF1 is fixed to be total active energy output (all-phase-sum). Both forward and reverse energy registers can generate the

CF pulse (change of forward/ reverse direction can generate an interrupt if enabled).

CF2 is reactive energy output (all-phase-sum) by default. It can also be configured to be arithmetic sum apparent energy

output (all-phase-sum).

CF3 is fixed to be active fundamental energy output (all-phase-sum).

CF4 is fixed to be active harmonic energy output (all-phase-sum).

Figure-5 CFx Pulse Output Regulation

For CFx pulse width regulation, refer to Figure-5.

Case1 T>=160ms, Tp=80ms

Case 2 10ms<=T<160ms, Tp=T/2

3.5.4

STARTUP AND NO-LOAD POWER

There are startup power threshold registers (e.g. PStartTh(35H)). Refer to 5.4 Configuration and Calibration Registers. The

power threshold registers are defined for all-phase-sum active, reactive and apparent power. The M90E32AS starts meter-

ing when the corresponding all-phase-sum power is greater than the startup threshold. When the power value is lower than

the startup threshold, energy is not accumulated and it is assumed as in no-load status. Refer to Figure-6.

There are also no-load Current Threshold registers for Active, Reactive and Apparent energy metering participation for

each of the 3 phases. If |P|+|Q| is lower than the corresponding power threshold, that particular phase will not be accumu-

lated. Refer to the PStartTh register and other threshold registers.

There are also no-load status bits (the TPnoload/TQnoload bits (b14~15, Fundamental / Harmonic Energy Register))

defined to reflect the no-load status. The M90E32AS does not output any pulse in no-load status. The power-on state is of

no-load status.

Figure-6 Active Power Startup/Noload Processing

CFx

Tp=80ms

Tp=0.5T

T≥160ms

10ms≤T<160ms

Phase Active

Energy Metering

Total Active

Energy Metering

ABS >

PStartTh?

Total Active Power

Phase Active

Power from DSP

Phase |P| + |Q| >

PPhaseTh?

Phase Active

Power from DSP

Phase |P| + |Q| >

PPhaseTh?

Phase Active

Power from DSP

Phase |P| + |Q| >

PPhaseTh?

Active Power

Startup/Noload handling

NoLoad Status

ATM90E32AS-AU-R Datasheet(PDF) 14 Page - ATMEL Corporation

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