The ladder is a programming structure that represents the circuit diagrams that control output hardware. A PLC uses a form of object-oriented programming called ladder logic, itself an advanced form of relay logic, which is closely related to the “C” programming language. With object-oriented programming, the programmer defines the data structure, the data type, and the operations/functions applied to the data structure. What is PLC Object-Oriented Programming? How does it Work? The PLC takes any incoming signals from things such as sensors or manual controls, processes them in a programming application, and then outputs control signals to a piece of equipment’s individual motion controllers or motors. PLC BasicsĪ PLC consists of a central processing computer, RAM and/or ROM memory, an Ethernet card, and a method of programming. When programmed properly, it is an important part of industrial automation and helps production environments to achieve maximum efficiency and speed. A Programmable Logic Controller (or PLC), simply defined, is the “brain” of a production machine or even an entire production line.
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