摘 要
　　　以三種液體的混合灌裝控制為例，將三種液體按一定比例混合，在電動(dòng)機(jī)攪拌后要達(dá)到一定的溫度才能將混合的液體輸出容器。并形成循環(huán)狀態(tài)。液體混合系統(tǒng)的控制設(shè)計(jì)考慮到其動(dòng)作的連續(xù)性以及各個(gè)被控設(shè)備動(dòng)作之間的相互關(guān)聯(lián)性，針對(duì)不同的工作狀態(tài)，進(jìn)行相應(yīng)的動(dòng)作控制輸出，從而實(shí)現(xiàn)液體混合系統(tǒng)從第一種液體加入到混合完成輸出的這樣一個(gè)周期控制工作的程序?qū)崿F(xiàn)。設(shè)計(jì)以液體混合控制系統(tǒng)為中心,從控制系統(tǒng)的硬件系統(tǒng)組成、軟件選用到系統(tǒng)的設(shè)計(jì)過(guò)程（包括設(shè)計(jì)方案、設(shè)計(jì)流程、設(shè)計(jì)要求、梯形圖設(shè)計(jì)、外部連接通信等）,旨在對(duì)其中的設(shè)計(jì)及制作過(guò)程做簡(jiǎn)單的介紹和說(shuō)明。設(shè)計(jì)采用日本松下公司的AFP12417系列PLC去實(shí)現(xiàn)設(shè)計(jì)要求。
　　　
關(guān)鍵詞 ：多種液體，混合裝置，自動(dòng)控制



















The design of the liquid mixture in three control as an example
Abstract
　　　the request is to a certain proportion by the three liquid mixture, stirring after the motor to reach a certain temperature can be mixed containers of liquids output. And form a cycle. Liquid hybrid systems of control designed taking into account the continuity of its action and charged with various equipment moves between the interrelated, and for different working conditions, and make the appropriate motor control output, thus realizing the liquid hybrid systems from the first liquid Added to the mixture to complete the output of such a cycle control of the program. Designed to liquid mixed as the central control system, control system from the hardware components, software system to choose the design process (including design, design process, design requirements, the ladder design, external communications link, etc.), which seeks to The design and production process of doing brief introduction and description. Designed with the AFP2417 Corporation PLC to achieve the design requirements.
　　　
Keywords ：Variety of liquid； Mixed devices； Automatic control








目 錄

1緒論 1
2 多種液體混合灌裝機(jī)控制系統(tǒng)設(shè)計(jì) 2
2.1方案設(shè)計(jì) 2
2.2方案的介紹 2
3 硬件電路設(shè)計(jì) 3
3.1 總體結(jié)構(gòu) 3
3.2液位傳感器的選擇 5
3.3溫度傳感器的選擇 5
3.4攪拌電機(jī)的選擇 6
3.5 電磁閥的選擇 6
3.6 接觸器 7
3.7熱繼電器的選擇 7
3.8 PLC的選擇 7
3.9 PLC輸人、輸出口分配 9
3.10液體混合裝置輸人/輸出接線 10
4 軟件電路設(shè)計(jì) 11
4.1 程序框圖 11
4.2 根據(jù)控制要求和I/O地址編制的控制梯形圖 12
4.3 語(yǔ)句表 14
5 系統(tǒng)常見(jiàn)故障分析及維護(hù) 15
5.1 系統(tǒng)故障的概念 15
5.2系統(tǒng)故障分析及處理 15
5.2.1 PLC主機(jī)系統(tǒng) 15
5.2.2 PLC的I／O端口 15
5.2.3 現(xiàn)場(chǎng)控制設(shè)備 15
5.3 系統(tǒng)抗干擾性的分析和維護(hù) 16
6 結(jié)束語(yǔ) 17
致謝 17
參考文獻(xiàn) 18