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ADE7878 - Configuration issue

Question asked by kalpesh on Feb 18, 2014
Latest reply on Feb 20, 2014 by hmani

Hello,

I am using ADE7878 for single phase power measurement.

I have initialized  the following registers as given below:

Vn=230V/50Hz

Vfs=287.78V

In=0.869A

Ifs=5.64A

LCYMODE=0x0f

LINECYC=100

CFXDEN=156(MC=6400,1LSB=10^-3 WH)

WTHR0=0x72960D

WTHR1=0x23

VLEVEL=0x96256

VNOM=0x331EF9

ACCMODE =as default

A 200W LOAD is used for measuring the power consumption.

When I read the registers ...found

AWATTHR =0x003E

AVARHR=0x0000

VAHR=0x002D

AVrms =0x00331EF9

AIrms =0x 00083B23

 

My question is :

1.How to decode the AVrms , AIrms ,Whether is reading correct value or not?

2.Energy registers are working in accumulation mode or not?

  when i read the energy accumulation register for 1st time i got above value(AWATTHR =0x003E,AVARHR=0x0000,VAHR=0x002D)

but when i disconnected CT ....then i read the same register it was showing 0x0000000 but it should have retained the earlier value.

3. Is there any proper guidelines to set ADE7878 as energy meter other than quick setup?                                                                                                                              

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