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Feb 27, 2024 · A programmable Logic Controller(PLC) is a specialized digital computer employed in industrial settings for automation and control. Acting as the central brain of machinery and processes, PLCs receive input from sensors, process the data through programmed logic, and generate output signals to control devices like motors and valves.
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.
- What Is A Plc?
- Plc Basics
- How Does A Plc Work?
- Physical Structure of Plc
- Plc Applications
- Plc Programming
- Plc Programming Examples
- History of PLCs
What is a PLC?A PLC, or Programmable Logic Controller, is a computer built to function reliably under the tough conditions of industrial environments like extreme temperatures or dusty areas. It automates processes in industries, including manufacturing and wastewater treatment. PLCs share many features of the personal computer you have at home. Th...
PLCs, created by Dick Morley in 1964, have transformed the industrial and manufacturing sectors with functions such as timing, counting, and signal processing. The main advantage of a PLC over a “hard-wired” control system is that you can go back and change a PLC after you’ve programmed it, at little cost (just the cost of the programmer’s time). I...
The working of a programmable logic controller can be easily understood as a cyclic scanning method known as the scan cycle. A PLC Scan Process includes the following steps 1. The operating system starts cycling and monitoring time. 2. The CPU starts reading the data from the input module and checks the status of all the inputs. 3. The CPU starts e...
The structure of a PLC is almost similar to a computer’s architecture. Programmable Logic Controllers continuously monitor the input values from various input sensing devices (e.g. accelerometer, weight scale, hardwired signals, etc.) and produce corresponding output depending on the nature of production and industry. A typical block diagram of PLC...
PLCs have a variety of applications and uses, including: 1. Process Automation Plants (e.g. mining, oil &gas) 2. Glass Industry 3. Paper Industry 4. Cement Manufacturing 5. In boilers – Thermal Power Plants
When using a PLC, it’s important to design and implement concepts based on your particular use case. To do this, we first need to learn more about the specifics of PLC programming. A PLC program consists of a set of instructions either in textual or graphical form, which represents the logic that governs the process the PLC is controlling. There ar...
A signal lamp is required to be switched on if a pump is running and the pressure is satisfactory, or if the lamp test switch is closed. In this application, if there should be an output from the lamp inputs from both the pump and pressure sensors are required. Hence, AND logic gatesare used. OR logicis used for the test input condition, it is requ...
Initially, early PLCs couldn’t graphically represent logic, so they used Booleanalgebra to depict logical expressions. As programming terminals evolved, ladder logic became more common because it was a familiar format used for electromechanical control panels. More modern formats, such as state logic and Function Block diagrams, exist, but they are...
Mar 10, 2022 · Technical Article March 10, 2022 by Stephen St. Michael. 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 for modifying the operation of a control system.
A programmable logic controller (PLC) is a small, modular, solid-state computer with customized instructions for performing a particular task. PLCs, used in various industrial control systems (ICS es), have primarily replaced mechanical relays, drum sequencers and cam timers. PLCs have revolutionized the way industrial processes are controlled.
- Andrew Zola
Feb 24, 2020 · What Is a Programmable Logic Controller? Programmable Logic Controllers (PLCs) are industrial computers, with various inputs and outputs, used to control and monitor industrial equipment based on custom programming. PLCs come in many different sizes and form factors.
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Mar 14, 2021 · A Programmable Logic Controller (PLC) is a specialized computer that is used extensively in industrial and mechanical automation. Unlike traditional computers, PLCs are designed to operate reliably under harsh industrial environments, including extreme temperatures, humidity, and vibration. They are used to control a wide range of automation ...
