[PIC] Ade7753 vrms and irms problem.

[Nikhil24]

Hello, I am using ade7753 for my college project, I almost read all default register successfully. but I am facing very unique problem while reading VRMS an IRMS . when I gave input to Voltage Channel and current channel then i get proper voltage at VRMS but IRMS channel got stuck at 16385 (d) constant value . whatever load i applied it never change . and when i applied input to current chaanel only that time i found tremendous increment in VRMS even though input to that channel is not connected.please help me to troubleshoot this problem:bang:

Thanks In Advance...:-o

 

[KlausST]

Hi,

Show us your hardware and your code.

Klaus

 

[Nikhil24]

Hi,

Show us your hardware and your code.

Klaus

for the current channel, I followed ade 7753 evaluation board ckt diagram with CT. and same for voltage. rest of the ckt I made according to the data sheet of ade 7753. no change at all as they said I followed.

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Code C - [expand]
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# include<stdio.h>
#include"lcd.h"
#include"display.h"
#include"spi.h"
#include"timer.h"
 
void init_ports()
{
        TRISE = 0x00;               //LCD control signals as output
        ADCON1 = 0x06;          // Disable analog pins on PORTA 
        TRISD = 0x00;               //LCD Data pins as output
}
 
 
void vtg_current()
{
    for(i=0;i<2;i++)
    {
        spi_read(0x17,1);           //Read data from VRMS Register
        vtg = value/10000;
        vtg = vtg*111;
        vtg = (vtg/100) + 5;
        display('V');           //Display VRMS value on LCD
        __delay_ms(3000);       //To display VRMS for 10sec
 
        spi_read(0x16,2);
        display('I');           //Display VRMS value on LCD
        crt = value/10000;
        crt = crt*1000;
        crt = crt/500;
        __delay_ms(3000);       //To display VRMS for 10sec
    }
 
    //spi_read(0x02,3);
//  pwr = value/100;
//  display('E');
 // __delay_ms(2000);
}
 
void display_energy()
{
    spi_read(0x02,3);           //Read data from AENERGY Register
    pwr = value/100;
    display('E');
}
 
void display(unsigned char cas) 
{
    lcd_cmd(0x01);
    lcd_cmd(0x80);          
    switch(cas)
    {
        case 'V':lcd_string("Vrms");            
                lcd_cmd(0xc0);
                sprintf(buff,"%ld v",vtg);          //send value of VRMS to LCD.
                lcd_string(buff);
                break;
 
        case 'I':lcd_string("Irms");
                lcd_cmd(0xc0);
                sprintf(buff,"%ld ma",crt);         //send value of IRMS to LCD.
                lcd_string(buff);
                break;
        
        case 'E':lcd_string("AEnergy");                     //send value of Active energy to LCD.
                lcd_cmd(0xc0);  
                sprintf(buff,"%ld w/hr",pwr);
                lcd_string(buff);
                break;
    }   
}
 
void output()
{
    while(!TMR1IF);
            TMR1IF=0;
        
        TMR1H = 0X00;
        TMR1L = 0X00;
        TMR1ON = 1;
 
        /*if(++s_count==16)
        {
            s_count = 0;
            display_clock();
        }*/
        if(++m_count==916)
        {
            m_count = 0;
            minute++;
            lcd_cmd(0x8A);
            sprintf(buff1,"%d min",minute);         //send value of IRMS to LCD.
            lcd_string(buff1);
        //  display_energy();
        }
        else if(++h_count==5722)
        {
            h_count = 0;
            display_energy();
        }
}

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[KlausST]

Hi,

I followed ade 7753 evaluation board ckt diagram

In the past I've read this sentence many times...

But when the schematic was posted we saw differences in more than 50%.

Klaus

 

[Nikhil24]

Hi,


In the past, I've read this sentence many times...

But when the schematic was posted we saw differences in more than 50%.

Klaus

hello, i have attached pdf of my circuit.View attachment Motherboard.pdf

 

[KlausST]

Hi,

There's no ADE7753 at all.

Klaus

 

[Nikhil24]

Hi,

There are no ADE7753 at all.

Klaus

I used 10 pin headers to represent ic ... I had a plan to solder IC on some IC base and I found one so according to that I designed this circuit.i have attached the image of my IC base so you can understand more clearly.

 

[Nikhil24]

I used the IC base for ade.In the ckt, I used 10 pin headers to represent an IC base. for better understanding, I have attached my IC base photo.
Please go through the following link.
https://obrazki.elektroda.pl/8280470400_1489931872.jpg

 

[Aussie Susan]

Looking at your code, does your 'spi_read' function do some magic with the 'value' variable?
I'm not sure what computer (and therefore runtime library) you are using but I would suggest that it is very wrong to have the 'spi_read' function update a global variable (which we can't see declared anywhere in your code) rather than returning the value directly.
Susan