I have an application I'd like to change the Integral time on the fly, so to speak, is doing so going to have adverse effects on the PID (like resetting it, so it's like restarting?)
I think it should be bumpless, but I have not tried it. I suggest trying it and see.
However, are you sure you need to change the integral time? That is an unusual thing to do, and should only be necessary if you have a very non-linear process, such as an exothermic process for example. I would be interested to know why you need to do this.
We have a new Tube extruder, it takes a while to get up to full speed, so I was trying to compensate for that. I ended up taking a chance and just did it, seems to work fine.
I have never known an extruder to benefit significantly from different tuning on startup and operation. If you want assistance to see if your control can be improved I will gladly help. If so, post a chart showing the temperature and power during startup and tell us how the pid node is configured.
We are done with trials for now, we have additional equipment we need to finish setting up controls on, I'll set up logs when we get back to trying to run. We have also thrown in a second PID that we might need help with fine tuning.
