基于PLC的过程控制系统的设计

摘  要：可编程序控制器(PLC，programmable Logic Controller)因其高可靠性和较高的性价比，而在工业控制中被广泛应用。监控组态软件也是自80年代后期伴随个人计算机的普及而迅猛发展起来的。它以其具备的实时多任务、接口开放、使用灵活、功能多样、运行可靠等特点而具有很强的实用价值。
该项目采用的是德国Siemens公司的57-300系列PLC，运用与之相配的STEP7编程软件，通过LAD编程语言编制了下位机的控制程序。采用了同是Siemens公司的Wincc组态软件对上位机监控软件组态，实现现场数据实时记录和监控，设计了记录查询、报警、实时模拟等具有Windows风格的动态操作画面。
锅炉是工业生产的重要设备,其耗能大,应用广泛,对其安全、节能等方面进行控制具有重要的意义。
现场调试和运行表明，本文设计的控制系统实现了锅炉燃烧过程的自动控制，有效地降低了能耗，提高了生产管理水平。系统安装维护方便，运行稳定、可靠;监控软件功能齐全，人机界面友好，使用方便。
关键词: 可编程序控制器，组态软件，监控，现场总线

Control the Design of the System According to the PLC Process
Abstract：Programmable logic controller because of its high dependability and higher cost performance their, wide to suffused with application in industrial control. Control configuration software to follow popularization of personal computer and develop will it be later stage the eighties rapidly too. With real-time many tasks, interface open, flexible in usage, various operating characteristics such as being reliable and having strong practical value very function that possess there it.
With the Siemens PLC 57--300 and the corresponding Programming softwareSTEp7, that helps in control software programming. Have made the control procedure of the next machine through LAD programming language. The design work uses Wincc, that 15 also a Product from Siemens to configure. The supervisory software, realizing tile real--tilde data—logging, supervising and Controlling, as well as various visual HMI with Windows features such as real--time Weighing, record checking, alarming, dynamic simulation.
The boiler is the important equipments that the industry produces, it consumes the ability big, application extensively, as to its safety, and economy energy etc. carries on control to have the important meaning.
Adjust to try and circulate the enunciation on the scene, the control system of this text design carries out the boiler to burn the automatic control of the process, lowering availably can consume, raising the production control level. The system installs the maintenance convenience, circulate stability, credibility; supervision the software function is well-found, man-machine interface amity use the convenience.
Keywords：Programmable controller， configuration software，Proportioning， supervision and control，