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ADE7758: Line cycle energy accumulation method

Question asked by Angelmary on Jan 22, 2013
Latest reply on Mar 29, 2013 by hmani

Hi All,

 

I am using ADE7758 Poly phase energy metering IC for my project. I went through the data sheet of the ADE7758 IC, and some of the topics were quite confusing for me. Especially the "Energy accumulation mode" and "Line cycle energy accumulation mode".

 

What I could understand is, in Line cycle energy accumulation mode, the value in the value in Energy accumulation registers(eg. AWATTHR) gets updated gets updated when the number of half-line cycles becomes equal to the Line cycle (LINECYC) register count.

And in Energy accumulation mode, the value in Energy accumulation registers(eg. AWATTHR) gets updated at every 0.52 Sec.(WDIV=0).

Is this correct ?

 

In both the methods, before reading the Energy accumulation registers(eg. AWATTHR), do I have to wait for a Zero-cross detect for ensuring that the value has been updated ?

Or should I be waiting for the LENERGY interrupt to occur in Line cycle energy accumulation mode ?

 

Please help me to understand these concepts clearly.

 

Thanks & Regards,

Angel

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