Study and implementation of programmable logic controller
Study and implementation of programmable logic controller
复制标题
可编程逻辑控制器的研究与实现
DOI：
10.1626/jcs.79.373
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发表时间：
2008
影响因子：
--
通讯作者：
R. Samad
中科院分区：
文献类型：
--
作者：
P. Abinandhan;R. Prakash;R. Samad
本项目工作分为两个部分。第一部分介绍了可编程逻辑控制器的历史和发展及其在不同行业中的应用。第二部分采用PLC实现了对轿厢控制器、液位控制器、温度控制器三个不同过程的控制。许多不同过程的自动化，例如控制机器或工厂装配线，是通过使用称为可编程逻辑控制器（PLC）的小型计算机来完成的。这实际上是一个由可编程微处理器组成的控制装置，并使用专门的计算机语言进行编程。以前，可编程逻辑控制器将以梯形逻辑编程，这类似于继电器逻辑的原理图。现代可编程逻辑控制器通常使用几种语言中的任何一种进行编程，从梯形逻辑到Basic或C。通常，程序在个人计算机（PC）上的开发环境中编写，然后通过电缆连接直接下载到可编程逻辑控制器上。程序存储在可编程逻辑控制器的非易失性存储器中。可编程逻辑控制器为工厂自动化做出了重大贡献。早期的自动化系统必须使用数千个独立的继电器和凸轮定时器，但工厂系统中的所有继电器和定时器通常可以用单个可编程逻辑控制器代替。今天，可编程逻辑控制器提供了广泛的功能，包括基本继电器控制，运动控制，过程控制和复杂的网络，以及用于分布式控制系统。当人们需要与可编程逻辑控制器进行交互以对其进行配置或使用时，会使用几种不同类型的接口，其形式可能是简单的指示灯或开关或文本显示器，或者对于更复杂的系统，运行监控和数据采集（SCADA）系统的计算机上的计算机或Web接口。可编程逻辑控制器最初是为汽车工业服务而创建的，第一个可编程逻辑控制器项目于1968年为通用汽车公司开发，以电子控制器取代硬接线继电器系统。升降机控制器控制升降机的运动。该程序的目的是使电梯轿厢根据楼层请求移动到正确的楼层。温度控制器基于设定点控制流体的温度。液位控制器控制罐中液体的液位。
This project work is divided into two parts. The first part deals with the history and development of Programmable Logic Controllers and its subsequent applications in different industries. In The second part PLC was implemented to control 3 different processes namely lift car controller, Liquid level controller, Temperature controller. Automation of many different processes, such as controlling machines or factory assembly lines, is done through the use of small computers called a programmable logic controller (PLC). This is actually a control device that consists of a programmable microprocessor, and is programmed using a specialized computer language. Before, a programmable logic controller would have been programmed in ladder logic, which is similar to a schematic of relay logic. A modern programmable logic controller is usually programmed in any one of several languages, ranging from ladder logic to Basic or C. Typically, the program is written in a development environment on a personal computer (PC), and then is downloaded onto the programmable logic controller directly through a cable connection. The program is stored in the programmable logic controller in on-volatile memory.The programmable logic controller has made a significant contribution to factory automation. Earlier automation systems had to use thousands of individual relays and cam timers, but all of the relays and timers within a factory system can often be replaced with a single programmable logic controller. Today, programmable logic controllers deliver a wide range of functionality, including basic relay control, motion control, process control, and complex networking, as well as being used in Distributed Control Systems. There are several different types of interfaces that are used when people need to interact with the programmable logic controller to configure it or work with it. This may take the form of simple lights or switches or text displays, or for more complex systems, a computer of Web interface on a computer running a Supervisory Control and Data Acquisition (SCADA) system. Programmable logic controllers were first created to serve the automobile industry, and the first programmable logic controller project was developed in 1968 for General Motors to replace hard-wired relay systems with an electronic controller.The lift controller controls the movement of the lift. The program is designed to make the lift car move to the correct floor based on floor request. The temperature controller controls the temperature of the fluid based on a set point. The level controller controls the level of a liquid in a tank.