EpicWill (Customer) asked a question.
Trying to PID tune - nothing is happening
So I watched the AD videos on PID tuning. I have a unique setup - 3 separate rolls, each with 3 heating zones, so I need to AT 3 at a time. I set it to manual like the video says, set the set point (via HMI - it wouldn't change when using the PID view window) at 500ºF and set it manually to 40% power. The PID view screen shows the output properly and the PID instruction also shows the 40% output correctly. However the actual output value is still at zero (6553). What am I doing wrong?
Here's some screenshots:
Not sure if you are trying to auto-tune or tune the loops yourself. With 3 loops with 3 zones, I think it just means you need to coordinate the modes and auto tune?
Are you wanting to tune the loops yourself, or do you want to use auto-tune?
I have no idea when i comes to PID so I'm definitely trying to autotune. I was following along with this video (https://youtu.be/QnHTfkXenjU?si=igiPpcdq2CNxdVTh&t=66) but I'm using 4-20mA output and analog SSR's rather than doing PWM
But in the video, starting about 1:05, he says to set it to manual mode and set the output power and then set the setpoint. I have my setpoint set to 500 and se the power output to 50% as seen in my screenshots. With this the output should be on and themp should be rigins, like in the video. Yet nothing is happening and the PID block shows 6553 (zero value) for the output even though it says it's set to 50% output.
As for doing the three I have one PID view window open for each zone on that unit and was just going to click auto tune on all 3 at the same time. But I need to get the actual temps up near the 500ºF mark before I can auto-tune
2.11 has a way to show your PID views within your app window.
This will give you a good view of the 3 PID views. Prefer Horizontal over Vertical due to the need to access the form panel of the PID View.
eh, Vertical may be better - try both ways and choose the better one for accessing the Form. The Trend part is important too, but the trend part scales automagically, so it's useful even when it's not wide.