The PLC was created to simplify the implementation of relay type logic control. The control implemented with the help of PLCs, have since evolved to more than mere sequence control. The control solutions addressed by PLCs now include single input single output type PID control, feed forward control, and multiple PID loops in cascade control, to name but a few. Different processes have switched from a manual to an automatic type control approach. This reduces and in a lot of cases eliminates human error, improves process/control stability, improves efficiency, and increases throughput and/or output. Every control engineer should develop the skill and be able to use and implement PID control in simple control situations. At the completion of this tutorial, a fundamental understanding of the use of PID loops will be clear, as well as how to use it in RSLogix 5000.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/how-to-program-pid-loops-in-rslogix-5000