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Sorry meant to put in these screen shots but forgot. And indeed they do have it set to scale for PID ------------------------------ Clem ------------------------------

So our model is a ControlLogix 1769-L30ER. Though honestly don't know how recent of a model that is. It does have 32 firmware though so not too old. I will look into our unit types though. Giving our accuracy of t he mixture is a very big deal I want to find the method that gets us the most rock solid. ...

So I'll actually reply to both cause both had thought provoking points. So from the manual that Ryan had shared, PID range (in Blue) is 0 to 16,383 and Eng Units range (in Red) is 20,000 to 4,000 . The scaled unit we will use actually only needs 0 to 6400 (this being in the form of Parts Per Million ...

Very much appreciated sir! It doesn't look like I have access rights to TechConnect. Here's photo of the modules we have and of module 2's analog settings. I believe we're looking at number 1 of input module 2. Since we're set to 4 to 20mA and not any of the options that starts ...

So my issue is I have a system that has a chemical probe and transmitter that out puts a 4-20mA signal to communicate its readings on the chemical mixture. Our Logic has been setup by an integrator company and they are not very helpful. In my digging on how to setup 4-20mA inputs I found Tim Wilborne's ...