You'll BASICALLY need to move your setpoint (N7:36) into PD9:1.SPS – but we'll need to know more about the scaling before we can nail down that particular idea. Make sure that you set the Time Mode for TIMED. (you'll need to be OFFLINE when you do this step - and then download the modified program to the processor). since you already have one PID installed (as PD9:0), the most straight-forward way to proceed would be to enter a new PID instruction – on a new UNCONDITIONAL/EMPTY rung – and give the PID an address of PD9:1.

I'm just GUESSING that you're confused about how to go about creating a new PID instruction. īased on what you've shown so far, the module's signal (I:2.3) ranges in value from 6252 to 31207. what brand is it – and what is its model /catalog number?. What can you tell us about the module installed in slot #2?. So basically, I want I:2.3/F8:3 to get to 300 (N7:36) as close as possible.Īny help would be appreciated, especially explaining how. I want this to be my set point that I can key in from my HMI. What I want is the PID loop to watch I:2.3 (which is also F8:3).Īlthough, on my HMI, I have N7:36 (which is set to 300). What I want is to have O:5.2 be a PID loop (I did not add the PID instruction). Right now, I have O:5.2 being a value that is calculated based on what is calculated for O:5.3. Īnyway - hopefully this will at least get you heading in the right direction. (although many programmers do exactly that). you can't just 'drop it into place' and expect it to work correctly. a PID instruction is just ONE piece of a puzzle. especially the parts about the scaling, etc. It would also be a good idea to read through the entire thread. The following link might be helpful - at least as a demonstration of what type of 'detailed' help we can offer IF (big IF) you could post the entire RSS file. Well, for 'general' information, the 'book' and the 'online help' should get you started.

Rslogix 500 pid instruction