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目錄 摘 要 ............................................................................................................I Abstract........................................................................................................ II 1 概述 ............................................................................................................ 1 PLC 在國(guó)內(nèi)外研究動(dòng)態(tài) .......................................................................... 1 PLC 的發(fā)展趨勢(shì) ...................................................................................... 1 2 硬件系統(tǒng)設(shè)計(jì) ............................................................................................ 2 S7200 系統(tǒng)概述 ..................................................................................... 2 自動(dòng) 配料系統(tǒng) ......................................................................................... 4 3 自動(dòng)配料系統(tǒng)的設(shè)計(jì) ................................................................................ 7 PLC 編程軟件 STEP7 及其應(yīng)用 ............................................................. 8 自動(dòng)配料系統(tǒng)的設(shè)計(jì) ............................................................................. 9 4 系統(tǒng)改進(jìn)與完善 ...................................................................................... 15 監(jiān)控系統(tǒng)的功能介紹 ........................................................................... 15 前配料監(jiān)控系統(tǒng)的控制過(guò)程 ................................................................. 14 監(jiān)控系統(tǒng)報(bào)警控制過(guò)程 ....................................................................... 16 參考文獻(xiàn) ...................................................................................................... 16 致 謝 ......................................................................................................... 17 附錄 Ⅰ PLC 程序 ....................................................................................... 18 I 摘 要 PLC 的定義有許多種。國(guó)際電工委員會(huì)( IEC)對(duì) PLC 的定義是:可編程控制器是一種數(shù)字運(yùn)算操作的電子 系統(tǒng),專(zhuān)為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)。它采用可編程序的存貯器,用來(lái)在其內(nèi)部存貯執(zhí)行邏輯運(yùn)算、順序控制、定時(shí)、計(jì)數(shù)和算術(shù)運(yùn)算等操作的指令,并通過(guò)數(shù)字的、模擬的輸入和輸出,控制各種類(lèi)型的機(jī)械或生產(chǎn)過(guò)程。可編程序控制器及其有關(guān)設(shè)備,都應(yīng)按易于與工業(yè)控制系統(tǒng)形成一個(gè)整體,易于擴(kuò)充其功能的原則設(shè)計(jì) 本文基于 可編程序控制器 PLC 和組態(tài)軟件設(shè)計(jì)自動(dòng)配料系統(tǒng)的控制系統(tǒng)和監(jiān)控系統(tǒng)。首先,利用 德國(guó) Siemens 公司的 S7200 系列 PLC 對(duì)自動(dòng)配料系統(tǒng)進(jìn)行控制。運(yùn)用與之相配的 STEP7 編程,通過(guò) LAD 編程語(yǔ)言編制了下位機(jī)的控制程序 ,從而使該配料系統(tǒng)可以按要求完成自動(dòng)配料,裝料全過(guò)程。其次,自動(dòng)配料系統(tǒng)的監(jiān)控系統(tǒng)則實(shí)現(xiàn)現(xiàn)場(chǎng)數(shù)據(jù)的實(shí)時(shí)監(jiān)控。 本文的主要 內(nèi)容包括對(duì) 生產(chǎn)過(guò)程控制系統(tǒng)發(fā)展和現(xiàn)狀的概述 、 配料系統(tǒng)工作原理和配料控制系統(tǒng)的總體設(shè)計(jì) , 重點(diǎn)描述了包括硬件設(shè)計(jì)、編程環(huán)境及軟件設(shè)計(jì)在內(nèi)的西門(mén)子 PLC 在配料系統(tǒng)中應(yīng)用 的 一些細(xì)節(jié)及其在上位機(jī)監(jiān)控系統(tǒng)中一些基本設(shè)計(jì) , 以及 PLC與上位機(jī)之間的通訊。 關(guān)鍵詞 : 可編程序控制器 ; 配料;監(jiān)控 II ABSTRACT Programmable Logic Controller (PLC) is widely used in industry for its high reliability and performance/price ratio. The configuration software also enjoys fast development due to the popularization of personal puter, and is recognized of the value originated from the merits such as realtime multitasking, openness, flexibility, versatility, and reliability. Based on PLC and configuration software, the control system and supervisory system of automatic ingredient system are designed in this paper. First, the Siemens PLC S7200 is used to control automatic proportion system. The proportioning system included the requirements of automatic proportioning, weighing, and loading. Next the ZuTaiWang software is used to build the realtime supervisory system. The system can realize the realtime datalogging, as well as various visual. Paper’s contents mainly include that the industrial control system development and present situation outline. The ingr