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It wasn’t that long ago that treating wastewater and delivering clean, safe drinking water to homes relied on manual processes. Today, water treatment is largely automated, thanks in no small part to the use of Programmable Logic Controllers (PLCs) and other electrical devices that can be programmed to complete many of the tasks required with little to no human oversight.

Electric motors are used in multiple applications of our everyday lives but require the right amount of electrical energy to provide optimal torque and speed. To control these motors, Variable Frequency Devices (VFD), are used to convert AC current into DC current from the power supply. In this article we will look at how these devices work, and how they are important

When it comes to learning the foundations of PLC programming, it can be as easy as flicking on and off a switch. That’s the main difference between discrete and analog I/O modules! Discrete signals are simply on or off, whereas analog signals vary. 

The common definition one would find on Wikipedia describes a PLC or Programmable Logic Controller as the following:  “ A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.