純凈水水瓶原料干燥過(guò)程的PLC控制設(shè)計(jì)

電氣自動(dòng)化論文編號(hào):ZD884    論文字?jǐn)?shù):16348,頁(yè)數(shù):43

目 錄
摘  要 1
1  引言 3
2  系統(tǒng)設(shè)計(jì)方案和設(shè)計(jì)方案的論證 4
2.1  系統(tǒng)設(shè)計(jì)方案 4
2.1.1 系統(tǒng)工作過(guò)程 4
2.1.2 PLC機(jī)型選擇 5
2.1.3 常用I/O模塊的選擇 6
2.1.4 PLC系統(tǒng)的配置 6
2.2   設(shè)計(jì)方案的論證 6
2. 3 結(jié)論 9
3  干燥控制系統(tǒng) 10
3.1 干燥器簡(jiǎn)介 10
3.2 PET簡(jiǎn)介 12
4  PLC系統(tǒng)硬件組成 14
5  軟件實(shí)施方案 15
5.1 程序指令設(shè)計(jì) 15
5.2  系統(tǒng)軟件操作 16
5.2.1 系統(tǒng)軟件操作 16
5.2.2. 控制關(guān)鍵 16
6  軟件設(shè)計(jì)方法及說(shuō)明 17
6.1  運(yùn)行指示燈的信號(hào)產(chǎn)生 17
6.2  加熱器的投入和關(guān)閉 17
6.3  當(dāng)傳感器檢測(cè)到料位不足的信號(hào)時(shí) 18
6.4  風(fēng)機(jī)的停止 18
6.5  聲光報(bào)警程序 18
6.6  溫度顯示程序 19
7  控制邏輯功能實(shí)現(xiàn)過(guò)程說(shuō)明 20
7.1  程序設(shè)計(jì)流程圖 20
7.2  控制邏輯功能實(shí)現(xiàn)過(guò)程說(shuō)明 20
7.2.1 主程序 20
7.2.2 中斷子程序 22
7.3 控制邏輯功能實(shí)現(xiàn)過(guò)程的結(jié)論 22
總結(jié) 23
致謝 24
參考文獻(xiàn) 25
附 錄1  干燥器主接線圖 26
附 錄2  PLC接線原理圖 28
附 錄3  干燥控制系統(tǒng)I/O表 36
附 錄4  軟件設(shè)計(jì)流程圖 37
附 錄5  PLC梯形圖 38

摘  要
 本設(shè)計(jì)中主要針對(duì)干燥器的控制過(guò)程進(jìn)行設(shè)計(jì)。當(dāng)干燥器開(kāi)始工作，干燥風(fēng)機(jī)、再生風(fēng)機(jī)、輸送電機(jī)、加熱器、再生加熱器同時(shí)啟動(dòng)，當(dāng)傳感器檢測(cè)到干燥器料斗無(wú)料，則輸送風(fēng)機(jī)啟動(dòng)，PET被吸入干燥器，干燥開(kāi)始，PET經(jīng)過(guò)1次干燥和再生干燥后被送入制模機(jī)料斗。
 文章重點(diǎn)闡述了根據(jù)干燥器系統(tǒng)的硬件組成和工作方式設(shè)計(jì)的可編程控制器硬件和軟件的控制方法，同時(shí)，還詳細(xì)的介紹了可編程控制器的軟件實(shí)施方案、設(shè)計(jì)方案和系統(tǒng)的邏輯功能控制過(guò)程。系統(tǒng)中可編程控制器的控制過(guò)程包括干燥風(fēng)機(jī)、再生風(fēng)機(jī)、輸送風(fēng)機(jī)等的啟動(dòng)/停止以及它們與加熱器、再生加熱器的連鎖工作過(guò)程；當(dāng)干燥氣流溫度高于165℃，風(fēng)機(jī)過(guò)負(fù)荷、材料不足等故障時(shí)的應(yīng)急系統(tǒng)連鎖控制和及時(shí)的聲光報(bào)警提示。

關(guān)鍵詞：可編程控制器、傳感器、加熱器、輸送

Abstract
The design of the main control for dryer design process. When the dryer to work, dry air, renewable fans, conveyor motor, heater, heater renewable at the same time to start, when the sensors detect no feed hopper dryer, then start the transmission fan, PET dryer by inhalation, the beginning of drying, PET after one time after drying and regeneration of dry molding machine into the hopper.
The article focuses on the dryer system in accordance with the composition and working methods of hardware design of programmable controller hardware and software control method, also described in detail the software implementation of the programmable controller program, design programs and systems control process of the logic function. Programmable logic controller system to control the process, including drying fans, renewable fans, conveyors, etc. fan start or stop and their heaters, heater regeneration process chain; when the drying air temperature is higher than 165 ℃, fan overload , lack of material failure of the emergency system control and timely chain of sound and light alarm.

Keywords: programmable controllers, sensors, heaters, conveyors