PID Loop (PID) Instruction (Auto Tuning)
A Proportional-Integral-Derivative algorithm is a generic Control Loop feedback formula widely used in industrial control systems. A PID algorithm attempts to correct the Error
between a measured process variable and the desired setpoint by calculating and then outputting a corrective action that can adjust the process accordingly and rapidly, to keep the Error to a minimum.
The following links will explain the PID instruction.
https://www.csimn.com/CSI_pages/PIDforDummies.html
http://www.ni.com/white-paper/3782/en/
https://en.wikipedia.org/wiki/PID_controller
We will be using an immersion heater in a cup of water to keep the temperature at a constant value. Using the Productivity Suite software we will perform an autotune on our PID instruction. Our immersion heater will be controlled through a relay using time proportional control from our PID output. Let’s get started.
More information can be obtained on our website. This includes all of the links mentioned in this video.
https://accautomation.ca/productivity-1000-series-plc-pid-instruction
Here are some previous posts in this Productivity 1000 PLC Series. A full list can be obtained at the following location:
https://accautomation.ca/series/productivity-1000-plc/
System Hardware
Installing the Software
Establishing Communication
First Program
Documenting the Program
