The various manufacturers offer a host of Programmable Logic Controllers that can be programmed with a personal computer and programming software.PLC manufacturers provide their own proprietary version of ladder programming software. Siemens, Allen Bradley, Omron, GE Fanuc and Modicon are some of the biggest names in PLC control. This led to the modern PLC programming languages used throughout the world today.
Before PLC’s were commonplace electromechanical devices were used for machine control.Įngineers used ladder diagrams to design control circuits for machines that utilized electromechanical relays and timers.When the PLC was introduced traditional ladder diagrams were used as a basis of developing a programming language to make the transition from designing electromechanical relay circuits to programming virtual relays as seamless as possible. There are several PLC programming languages with PLC ladder logic being the most popular. PLC’s together with Ladder logic has transformed the industrial automation industry. The device mentioned above is known as a Programmable Logic Controller or PLC for short and the software that enables this virtual circuit building is known as Ladder Logic or Ladder Diagram. Welcome to the world of industrial automation where the above scenario is played out daily and everywhere in-between.
Imagine drawing an electrical circuit on your computer then downloading it into a device that would transform your virtual circuit into a real electrical circuit. Ladder logic programming is like virtual circuit building
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