【正文】 I 基于 PLC的自動售貨機設(shè)計 摘要 在科技日新月異的現(xiàn)在社會，自動售貨機的應(yīng)用已經(jīng)越來越廣泛， 隨著自動售貨機的廣泛應(yīng)用，對于它的性能要求越來越高，因此如何設(shè)計更為簡易便捷的自動售貨機 顯得 尤為重要。 本論文以西門子 S7300 系列 PLC 來實現(xiàn)自動售貨機的功能控制。本課題 設(shè)計 的售貨機能實現(xiàn)投幣、購物、退幣等 功能，且可以進行遠程監(jiān)控。論文首先根據(jù)需求對系統(tǒng)做 出總體設(shè)計；然后對各主要硬件進行了選型且對 I/O 進行分配； 接著根據(jù)系統(tǒng)的硬件連接情況編寫相應(yīng)程序?qū)崿F(xiàn)要求功能；最后編寫 組態(tài)王程序?qū)崿F(xiàn)系統(tǒng)的遠程監(jiān)控。 關(guān)鍵詞： 自動售貨機 PLC 組態(tài)王 II PLCbased vending machine design Abstract In the everchanging technology and now social, vending machines applications has bee increasingly widespread, with extensive use of vending machines, for its performance requirements are high, so how much more simple design is especially convenient vending machines important. In this thesis, Siemens S7300 series PLC to achieve functional control of the vending machine. Design of this project can be realized coin vending machines, shopping, coin and other functions, and can be remotely monitored. Firstly, according to the needs of the system to make the overall design。 then all the major hardware and a selection of I / O assignment。 then write the corresponding program to achieve functional requirements based on the system39。s hardware connections。 finally written procedures for system configuration king remote monitoring. Key words： Vending machine； PLC； KingView III 目錄 1 緒論 .......................................................................................................................... 1 課題的研究背景和意義 ..................................................................................... 1 自動售貨機國內(nèi)外研究現(xiàn)狀 ............................................................................. 1 課題研究的安排 ................................................................................................. 3 2 自動售貨機的整體設(shè)計 ..................................................................................... 4 控制系統(tǒng)總框圖 ................................................................................................. 4 自動售貨機的組成及工作原理 ......................................................................... 4 自動售貨機的組成 ..................................................................................... 4 自動售貨機的工作原理 ............................................................................. 6 本章小結(jié) ............................................................................................................. 6 3 系統(tǒng)的硬件設(shè)計 ................................................................................................... 7 系統(tǒng)硬件結(jié)構(gòu)框圖 ............................................................................................. 7 傳感器選型 ........................................................................................................ 7 電動機的選型 ..................................................................................................... 8 顯示屏選型 ........................................................................................................ 8 PLC 的選型 ......................................................................................................... 9 PLC 的定義 ................................................................................................. 9 PLC 控制系統(tǒng)中的 I/O 點數(shù)計算與分配 ............................................... 10 PLC 的選擇依據(jù) ....................................................................................... 12 本章總結(jié) ........................................................................................................... 13 4 系統(tǒng)的軟件設(shè)計 ................................................................................................. 14 軟件系統(tǒng)結(jié)構(gòu)框圖 .......................................................................................... 14 IV 系統(tǒng)流程圖 ...................................................................................................... 14 投幣環(huán)節(jié)設(shè)計 ................................................................................................... 15 選擇環(huán)節(jié)設(shè)計 ................................................................................................... 16 比較環(huán)節(jié) ........................................................................................................... 18 退出環(huán)節(jié)設(shè)計 ................................................................................................... 19 本章總結(jié) .......................................................................................................... 20 5 自動售貨機的實現(xiàn) ............................................................................................ 21 組態(tài)王通訊 ....................................................................................................... 21 外部設(shè)備定義 ......................................................