【正文】 II Based on PLC automatic vending machine system design ABSTRACT Chooses PC machine in the design to take the host workstation on position machine, the lower position machine uses PLC to make the controller, three PLC controllers respectively be from the workstation 1, from the workstation 2, from the workstation 3, in the article exhaustively introduced the automat various hardware position, and has pleted the PLC exterior wiring diagram. In the article has manufactured on the position machine user management contact surface. The present paper key point places the PLC various hardware part the design and the introduction, the PLC trapezoidal chart Defers to in the overall design process “asks the question, the analysis question, solves the problem” the guiding ideology, has made the careful elaboration to the overall system design work. KEY WORDS: the vending machine， Programmable controller， Ladder diagram 河南城建學(xué)院本科畢業(yè)設(shè)計 (論文 ) 目錄 III 目 錄 第 1章 緒論 .................................................................................................................... 1 ..................................................................................................... 1 ............................................................................. 2 ......................................................................................... 2 ......................................................................................... 3 第 2章 自動售貨機硬件結(jié)構(gòu)設(shè)計 .......................................................................... 4 .................................................................................................... 4 .......................................................................................................... 4 ...................................................................................................... 7 .............................................................................................................. 7 ............................................................................................................ 10 顯示裝置 .......................................................................................................... 10 本章小結(jié) .......................................................................................................... 11 第 3章 總體設(shè)計方案 ............................................................................................... 12 ................................................................................................ 12 程 ........................................................ 12 .................................................................................... 13 ............................................................................................. 13 PLC控制系統(tǒng)設(shè)計編程要求及基本原則 ....................................................... 14 ................................................................................................ 14 ................................................................................................ 15 系統(tǒng)硬件結(jié)構(gòu)框圖 .......................................................................................... 16 第 4章 自動售貨機控制系統(tǒng)設(shè)計 ........................................................................ 18 ............................................................................... 18 PLC選型 ............................................................................................................. 18 ................................................................................................. 18 .................................................................................... 19 I/O點估算和 PLC選型 .......................................................................... 20 I/O地址設(shè)計 ..................................................................................................... 21 流程 設(shè)計 .......................................................................................................... 22 .................................................................................... 24 程序設(shè)計 ......................................................................................................... 25 河南城建學(xué)院本科畢業(yè)設(shè)計 (論文 ) 目錄 IV ........................................................................... 25 投幣程序 .............................................................................................. 26 ....................................................................................... 26 .................................................... 27 ................................................................... 27 ....................................................................................... 28 ................................................................................... 29 第 5章 仿真 ................................................................................................................. 30 ......................................................................................... 30 具體事例的分析 .............................................................................................. 31 結(jié) 論 ........................................................................................................................... 38 參考文獻 ...................................................................................................................... 39 致 謝 ........................................................................................................................... 40 附 錄 ..........................................................................................