PID Autotune not presenting new coefficients

[ksasikumar]

I have been doing some PID Auto-tuning and noticed for the past few tuning cycles the Autotune is returning the same coefficients I had manually entered when starting the PID loop. I'm pretty sure this is an error since there should be some change to the PID loop after tuning. Why is this happening, is there any way to remedy it?

[BobO]

I have been doing some PID Auto-tuning and noticed for the past few tuning cycles the Autotune is returning the same coefficients I had manually entered when starting the PID loop. I'm pretty sure this is an error since there should be some change to the PID loop after tuning. Why is this happening, is there any way to remedy it?

My guess is that something is stepping on it, so you aren't ever seeing the actual autotune results.

[ksasikumar]

I think I found it - the PIDINIT was on. Related to this - should PIDINT only run on First Scan for it to push values into the PID?

[BobO]

I think I found it - the PIDINIT was on. Related to this - should PIDINT only run on First Scan for it to push values into the PID?

Yep.

[ksasikumar]

Thanks again BobO