I'm new to the forum, and a cursory check did not yield the answer I was looking for, so here goes.... I am needing a PID control for a heating application. The PID function blocks provide an output value that is a REAL variable, and goes positive or negative. My two needs: Tuning this PID loop--are there good resources for taking the guesswork out of this? Applying the output value to a Pulse Width Modulator. Since the output value of the PID goes both positive and negative, I've been trying to logically work out in my head how that would apply to the pulse width modulation of a relay to my SSR that controls my heating element.
