MSP430F67641: MSP430F67641PZ output with noise(sometimes wrong value)

Gary Zeng

Part Number: MSP430F67641

Function: This machine is uesd for measuring active and reactive power in the grid. And the problem is that there will be a wrong value when measuring the reactive power. And the value of active power is always correct.

Help: So could TI MSP experts help review this schematic to whether there is any problem in schematic or maybe in software. If there is no problem in schematic. I can show you the software of this project.

over 3 years ago

0 Brandon Fisher94 over 3 years ago

TI__Mastermind 28075 points

Hi Gary,

Checking their circuitry leading from the sigma delta it looks okay. Did they follow one of our TIDAs or an EVM as an example?

In your post title you mentioned that sometimes the value is wrong, is it also sometimes correct? Are they using our Energy Measurement library and GUI?

Best Regards,
Brandon Fisher

0 Gary Zeng over 3 years ago in reply to Brandon Fisher94

TI__Intellectual 1490 points

Hi Ti experts,

Thanks for the reply and help.

Yes. Most of the time, the sampled value is correct.
The EVM they refer to is TIDR486.
Where can we get the software of Energy Measurement library. could you please share the website link?

Thx.

0 Brandon Fisher94 over 3 years ago in reply to Gary Zeng

TI__Mastermind 28075 points

Hi Gary,

The Energy Measurement Library for MSP430 is here: https://www.ti.com/tool/MSP-EM-DESIGN-CENTER

See here for the Energy Measurement Library guide as well: https://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/EnergyMeasurementDesignCenter/1_40_00_03/release/EnergyMeasurementDesignCenter_1_40_00_03/docs/users_guide/html/Energy_Measurement_Technology_Guide_html/markdown/index.html

Best Regards,
Brandon Fisher

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MSP430F67641: MSP430F67641PZ output with noise(sometimes wrong value)