negative P gain for PID

i had used the PID tuner app for matlab and I got the proportional gain to negative (-474) but integral and derivative gains to be positive. Wat all can be done next in order to know whether my PID controller is physically realisable or not?

Answer 1

[Arkadiy Turevskiy]

Why are you worried that your controller would not be physically realizable? Negative Kp does not mean controller is unstable.

[M Gokul]

Thank you for the help. I got it rectified.

[Anthony Amorosi]

Hi there,

Sorry to bring this old old topics back to live, but could you elaborate a bit on that ?

How do you physically build a PID controller with a negative P gain but positive I & D gains ?

Thanks, Anthony.