Intruduction to Tuning a Simulator with the PID Instruction (using ControlLogix) In the previous section, we set up the PID instruction in ladder logic. We created a Task, a Program, and a Routine. Not only did we set up the configuration, but also the scaling. At this point, we are Read More »
Introduction to Ladder Logic for the PID Simulator (ControlLogix Processor) After you set up your main variables, we can configure Ladder Logic for the PID Simulator. I would recommend setting up a periodic task. We can place our PID logic in this task. This will guarantee the execution time of Read More »
Introduction to Setting up the PID Simulator When setting up the PID simulator, we will need to make a few connections. Also, we need to test the values to get our raw low and raw high. We will use these values for scaling. To build your own simulator, check out Read More »
Introduction to PID Terminology PID Terminology is essential to understanding how PID works. For this reason, we’ll go through various terms you will see when reading about PID. In short, PID itself stands for Proportional, Integral, and Derivative. Basically, the purpose of PID is to hold analog values at a Read More »
Introduction to PLC Status Indicators PLC Status indicators will tell us a lot about our system. Above all, they help us to troubleshoot the system to minimize down time. For example, if an output status light is on, that tells us the logic is calling for the output. In this Read More »
Introduction to Arduino PID Simulator This project is an Arduino PID Simulator. Basically, the Arduino will send a process variable to a PID controller. In this case, the signal is 0 to 5v. Additionally, the Arduino reads the control variable from the PID controller, and simulates a real world process. Read More »
Introduction to FactoryTalk View Button with Multi-state Indicator By using a Button with Multi-state Indicator, you will overcome the limitation of a button’s two states. Basically, we just make the button transparent with a multistate indicator behind it. This reflects multiple states. Each state will have different colors, and different Read More »
Introduction to FactoryTalk Three State Button A FactoryTalk Three State Button allows you to write to a bit, then reflect three states. For example, we might write to a bit to start a pump. After that, the pump is starting, so we might changed from the “stopped” state to the Read More »
Modbus on ControlLogix Serial Port An inexpensive way to run Modbus on ControlLogix Serial Port is with an RS232-RS485 Adapter. In short, download Rockwell’s sample code. Apply power to the adapter, and you will be up and running on Modbus! In this case, I’m using cheap Temperature and humidity sensors Read More »
Introduction to Building the Kim Uno (Kim-1) Building the Kim Uno (Kim-1) is fairly easy, but a little bit time consuming if you don’t use a PC board. The Kim-1’s technology from 1976. It’s fun to program, however, you do have limited memory. The Kim Uno emulates a 6502 processor Read More »
