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Original question:

TMS320F280049C: Questions about PID Controller Example in C2000Ware_DigitalPower_SDK(5.04)

TMS320F280049C: TMS320F280049C PID

Andrew Andoh
Prodigy 50 points
Part Number: TMS320F280049C


Tool/software:

Hi I am using the runPID function here: https://dev.ti.com/tirex/explore/node?node=A__AMe6r5j9.d3mdLDJN5DoEQ__digital_power_c2000ware_sdk_software_package__5C6SEVO__LATEST&placeholder=true

I want to understand the Kp parameter. Am I able to set this to 0? I am setting it to 0 to check for open loop response without the PID before I enable it. If not what is the lowest parameter I can set it to?

Can I also set Kr,c1 and c2 to 0 for open loop test?

Thanks.

  • 0
    TI__Intellectual 2266 points

    Hello,

    Yes you can set the proportional part to zero, and it'll still retain the feedback & saturation during open loop. Altneratively, you can use Direct Form compensators, such as DF22 (Direct Form 2 2nd order, or 2poles and 2zeros). Which is typically used to shape the open loop frequency response.

    But yes, as for Kr, c1 and c2. Refer to the default variable for these parameters. I believe they're 1, 1, 0 respectively.

    Best,

    Sen Wang