ade7880 Analog Devices, Inc., ade7880 Datasheet - Page 98

• Manufacturer Part Number: ade7880
• Description: Polyphase Multifunction Energy Metering Ic With Harmonic Monitoring
• Manufacturer: Analog Devices, Inc.

ADE7880
3
4
7:5
Table 46. ACCMODE Register (Address 0xE701)
Bit
Location
1:0
3:2
5:4
6
7
Table 47. CONSEL[1:0] Bits in Energy Registers
Energy Registers
AWATTHR, AFWATTHR
BWATTHR, BFWATTHR
CWATTHR, CFWATTHR
AVARHR, AFVARHR
BVARHR, BFVARHR
CVARHR, CFVARHR
PEAKSEL[1]
PEAKSEL[2]
Reserved
Bit Mnemonic
WATTACC[1:0]
VARACC[1:0]
CONSEL[1:0]
REVAPSEL
Reserved
1
1
000
Default Value
00
00
00
0
1
CONSEL[1:0] = 00
VA × IA
VB × IB
VC × IC
VA × IA’
VB × IB’
VC ×IC’
measurement period indicated in the PEAKCYC register decreases accordingly because zero
crossings are detected on more than one phase.
When this bit is set to 1, Phase A is selected for the voltage and current peak registers.
When this bit is set to 1, Phase B is selected for the voltage and current peak registers.
When this bit is set to 1, Phase C is selected for the voltage and current peak registers.
Reserved. These bits do not manage any functionality.
Description
00: signed accumulation mode of the total and fundamental active powers. The total and
fundamental active energy registers and the CFx pulses are generated in the same way.
01: positive only accumulation mode of the total and fundamental active powers. In this
mode, although the total and fundamental active energy registers are accumulated in
positive only mode, the CFx pulses are generated in signed accumulation mode.
10: reserved. When set, the device behaves like WATTACC[1:0] = 00.
11: absolute accumulation mode of the total and fundamental active powers. The total and
fundamental energy registers and the CFx pulses are generated in the same way.
00: signed accumulation of the fundamental reactive powers. The fundamental reactive
energy registers and the CFx pulses are generated in the same way.
01: reserved. When set, the device behaves like VARACC[1:0] = 00.
10: the fundamental reactive power is accumulated, depending on the sign of the
fundamental active power: if the active power is positive, the reactive power is accumulated
as is, whereas if the active power is negative, the reactive power is accumulated with reversed
sign. The fundamental reactive energy registers and the CFx pulses are generated in the
same way.
11: absolute accumulation mode of the fundamental reactive powers. The fundamental
reactive energy registers and the CFx pulses are generated in the same way.
These bits select the inputs to the energy accumulation registers. IA’ , IB’ , and IC’ are IA, IB, and
IC shifted respectively by −90°. See Table 47.
00: 3-phase four wires with three voltage sensors.
01: 3-phase three wires delta connection. In this mode, BVRMS register contains the rms
value of VA-VC.
10: 3-phase four wires with two voltage sensors.
11: 3-phase four wires delta connection.
0: The total active power on each phase is used to trigger a bit in the STATUS0 register as
follows: on Phase A triggers Bit 6 (REVAPA), on Phase B triggers Bit 7 (REVAPB), and on
Phase C triggers Bit 8 (REVAPC).
1: The fundamental active power on each phase is used to trigger a bit in the STATUS0
register as follows: on Phase A triggers Bit 6 (REVAPA), on Phase B triggers Bit 7 (REVAPB),
and on Phase C triggers Bit 8 (REVAPC).
Reserved. This bit does not manage any functionality.
CONSEL[1:0] = 01
VA × IA
VB = VA – VC
VB ×IB (See Note)
VC × IC
VA x IA’
VB = VA – VC
VB × IB’ (See Note)
VC × IC’
Rev. PrE| Page 98 of 103
CONSEL[1:0] = 10
VA × IA
VB = −VA – VC
VB × IB
VC x IC
VA × IA’
VB = −VA – VC
VB × IB’
VC × IC’
Preliminary Technical Data
CONSEL[1:0] = 11
VA × IA
VB = −VA
VB × IB
VC × IC
VA × IA’
VB = −VA
VB × IB’
VC × IC’