MSP430I2041: Issue in PF value Calibration

Hi Raman,

Are you using a custom board? If so, did you select the correct ADC channels in the EMDC GUI when you configured the code? Also, it's important to use the same EMDC project with the code generated by that project. Otherwise, communication issues can occur due to a mismatch in the parameters.

Did you calibrate gain first? What RMS values are you applying to your board?

Another area you could check in the EMDC GUI is your sensor parameters. If the PGA gain for the ADC channels is too low, the amplitudes from your voltage and current sensors won't get amplified and may appear as zero.

I think you're seeing VRMS, correct? If so, then what you're seeing points to an issue with the ADC channel configuration for the current sensor.

Regards,

James

Hi James,

Thanks for your reply.

Yes i have configured correct ADC channel.

Yes i have calibrated gain and than phase.

And Vrms & Irms values are coming accurate Vrms= 230 & Irms=0.750 amp.

Thanks,

Raman

Hi Raman,

This is very strange.

• Can you share your EMDC project file (not your code) with me?
• Have you made any changes to the EMDC-generated code?
• Are you using the latest version of EMDC?
• What current sensor are you using?
• If it's a shunt, what's the max RMS current expected and the resistance of the shunt?

Regards,

James

Hi James,

No, I haven't made any changes in code.

I am using EMDC version 1.30.

I am using CT 2000:1.

Thanks,

Raman

0830.test.zip

Hi Raman,

Thanks for sharing those details. What's the resistance of your CT's burden resistor? Also, I can't access the zip file for some reason. I can download it but cannot extract it.

Regards,

James

Hi James,

I am sharing screenshot of my EMDC project.

Hi Raman,

Thanks for sharing those screenshots. That's helpful. I suspect that the power and other related parameters are zero because the power scaling factor is zero. You could try changing those values in the code back to default or create a new EMDC project. I'm not sure how they could have been reset at the moment.

Can you please try creating a new EMDC project with these same settings (different name), generate the code, import the code into a new CCS workspace and then program your device? In CCS, make sure the Info and Main Flash memory get erased. Under the CCS project properties, go to Debug > MSP430 Flash Settings > Erase Options and select "Erase main and information memory" and then click "Apply and Close" before programming the device.

Regards,

James