What is PIDF?

[Ether]

Originally Posted by geniusadam69

I is integral, so sum (E) *Ki = output
D is derivative, so (E,now - E,last) *Kd = output.

I component = sum(err∙∆t)
D component = ∆err/∆t

since this thread is about PIDF (not just PID):

F component is a (usually experimentally determined) value (or values) that is added to the output. It can be a fixed value (if there is only one setpoint) or it can be in a lookup table or function within the controller.