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ADE7880 - Can't Get Correct Line Voltage Frequency

Question asked by karens on Nov 17, 2014
Latest reply on Dec 1, 2014 by dlath



On my application, the line voltage should be 60 Hz. But with ADE7880, reading register APERIOD / BPERIOD / CPERIOD, the hex code always 0x1045h, sometimes 0x1046 or 0x1044, the corresponding decimal value is 4165. Using the equation on the data sheet,

frequency = 256000/4165, is around 61.46Hz. I already set SELFREQ bit at COMPMODE register to '1'. I wonder how could I correct this offset. With the device that using ADE7953, the frequency reading is 60 Hz. Please help me on this issue.