ADE9000 Peak value and HZ calculation

Hi~ I am studying ADE9000.

The HZ value is being read from the register(APERIOD, 0x418) and there is no change at 60HZ.

I am using Arduino sample code to measure the value, but I keep getting 60HZ without inputting voltage and current. I want to know how to measure the frequency

Also, I want to know which register should be set to obtain V PEAK and I PEAK in 3 phase.

void ADE9000Class:: ReadPeriodRegsnValues(PeriodRegs *Data)
{
uint32_t tempReg;
float tempValue;
tempReg=int32_t (SPI_Read_32(ADDR_APERIOD)); //Read PERIOD register
Data->PeriodReg_A = tempReg;
tempValue=(float)(8000*65536)/(float)(tempReg+1); //Calculate Frequency
Data->FrequencyValue_A = tempValue;
tempReg=int32_t (SPI_Read_32(ADDR_BPERIOD)); //Read PERIOD register
Data->PeriodReg_B = tempReg;
tempValue=(float)(8000*65536)/(float)(tempReg+1); //Calculate Frequency
Data->FrequencyValue_B = tempValue;
tempReg=int32_t (SPI_Read_32(ADDR_CPERIOD)); //Read PERIOD register
Data->PeriodReg_C = tempReg;
tempValue=(float)(8000*65536)/(float)(tempReg+1); //Calculate Frequency
Data->FrequencyValue_C = tempValue;
}

ADE9K_Write16(ADDR_ACCMODE,0x0100);

ADE9K_Write16(ADDR_CONFIG3,0xF01C);
ADE9K_Write32(0x0400,0x7000000);
ADE9K_Write32(0x0401,0x7000000);