ADE5166_08 AD [Analog Devices], ADE5166_08 Datasheet - Page 61

• Manufacturer Part Number: ADE5166_08
• Description: Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
• Manufacturer: AD [Analog Devices]

Var Antitamper Accumulation Mode
The ADE5169 is placed in var antitamper accumulation mode
by setting the SAVARM bit in the ACCMODE register
(Address 0x0F). In this mode, the reactive power is accumulated
depending on the sign of the active power. When the active
power is positive, the reactive power is added as it is to the reactive
energy register. When the active power is negative, the reactive
power is subtracted from the reactive energy accumulator (see
Figure 68). The CF pulse also reflects this accumulation method
when in this mode. The default setting for this mode is off. Transi-
tions in the direction of power flow and no load threshold are
active in this mode.
REACTIVE ENERGY
REACTIVE POWER
ACTIVE POWER
APSIGN FLAG
THRESHOLD
THRESHOLD
THRESHOLD
THRESHOLD
NO LOAD
NO LOAD
NO LOAD
NO LOAD
Figure 68. Reactive Energy Accumulation in
Antitamper Accumulation Mode
INTERRUPT STATUS REGISTERS
POS
NEG
POS
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Var Absolute Accumulation Mode
The ADE5169 is placed in absolute accumulation mode by
setting the ABSVARM bit (Bit 3) in the ACCMODE register
(Address 0x0F). In absolute accumulation mode, the reactive
energy accumulation is done by using the absolute reactive
power and ignoring any occurrence of power below the no load
threshold for the reactive energy (see Figure 69). The CF pulse
also reflects this accumulation method when in the absolute
accumulation mode. The default setting for this mode is off.
Transitions in the direction of power flow and no load threshold
are active in this mode.
Reactive Energy Pulse Output
The ADE5169 provides all the circuitry with a pulse output
whose frequency is proportional to reactive power (see the
Energy-to-Frequency Conversion section). This pulse frequency
output uses the calibrated signal after VARGAIN, and its behavior
is consistent with the setting of the reactive energy accumulation
mode in the ACCMODE register (Address 0x0F). The pulse
output is active low and should preferably be connected to an LED,
as shown in Figure 75.
Figure 69. Reactive Energy Accumulation in Absolute Accumulation Mode
REACTIVE ENERGY
REACTIVE POWER
THRESHOLD
THRESHOLD
NO LOAD
NO LOAD
ADE5166/ADE5169