Every automated cell requires a ‘brain’ in order to achieve the required tasks. How do you determine the necessary I/O, communication protocols, and processor necessary for controlling your system? Previously, we have covered the initial steps of choosing the proper automation project and getting started with the initial connections to the real world with sensor … Read more
What software languages are used with programmable logic controllers? What software languages are used with programmable logic controllers? An important part of using programmable logic controllers (PLCs) IEC 61131-3 is part three of the international standard for programmable logic controllers. In this section of the standard, the software architecture and valid programming languages of a … Read more
Implementing PID control in a PLC is far more complicated than textbooks would make it appear. There is more to the process than simply picking gain (k) values and calculating an output value. Control algorithms have evolved since the early days of computation. It started with simple on/off limits (like a thermostat) then moved to … Read more
In the world of automation, PLCs and PACs are often at the center of the action. But where did these machines come from, what are the functional differences between the two, and what applications are they best suited for? In the 1960s, computers were ruggedized for industrial environments where they were implemented to automate simple … Read more
Mitsubishi’s FX series PLC is one of MELSOFT GX Developer’s most popular automation solutions for small and medium-scale applications. Learn how to use GX Developer software to program the FX series PLC. The FX series PLC is one of the introductory MELSEC product lines from Mitsubishi Electric. The company is widely recognized for the manufacturing … Read more
Controlling an industrial robot can be done through the use of well-crafted signal handshakes. Follow along as we dive into several robot-to-PLC communication strategies. In an automated environment, we use program instructions, oftentimes in ladder logic or structured text, to command robots and other equipment to do work. However, external devices like those robots and … Read more
This article discusses the concept of state machines and state machine programming, particularly when utilized with ladder logic. Overview Ladder logic is a common visual programming language that can execute in a PLC. Ladder logic is used to control machinery and direct processes in industrial control applications. Frequently, there is a desire to utilize ladder … Read more
This article describes the programming language ladder logic used to program PLCs and shows examples of how it functions. Ladder diagram, better known as ladder logic, is a programming language used to program PLCs (programmable logic controllers). This article will briefly describe what ladder logic is and go over some examples of how it functions. … Read more
What is a PLC? This article will lay out a succinct definition of a programmable logic controller and explain its basic components. The programmable logic controller, or PLC, is ubiquitous in every kind of process and manufacturing industry today. PLCs were initially designed to replace electromechanical relay systems in order to offer a simpler solution … Read more
A brief overview of controllers through history and an analysis of factors to consider when deciding which one to use. A Historical Context PLCs were initially introduced in the 1960s and early 1970s. The goal back then was to replace relay switch cabinets and large masses of wires with a more compact and efficient solution. Later … Read more