【正文】
the procedure of each process to plete the design of the basic requirements. The design of Automatic Beverage Vending Machine PLC Control System is based on Siemens S7200 series. The paper introduces the basic structure of PLC, characteristics and work principle. In the PLC trapezoidal chart pilation, this paper adopts the Siemens PLC ladder special piler software version 4 of the STEP7 to write, and pleted the PLC external wiring diagram. To improve the stability of the system by using automatic beverage vending machine PLC control logic, and ensure no or little loopholes, the vending machine can have a longterm stable operation, not often need someone maintenance Keywords: automatic beverage vending machine; PLC; ladder diagram ; Siemens 目錄 3 目錄 摘要 ................................................................................................................................. 1 ABSTRACT ..................................................................................................................... 2 目錄 ................................................................................................................................. 3 第一章 .緒論 ................................................................................................................... 4 自動售貨機的發(fā)展歷史 ........................................................................................ 4 自動售貨機簡介 ................................................................................................... 5 自動售貨機工作原理 ............................................................................................ 5 自動售貨機設計要求 ............................................................................................ 6 第二章.總體設計方案 ..................................................................................................... 7 總體設計思路 ...................................................................................................... 7 、 PLC 總體設計流程 ............................................................................................. 7 第三章.硬件設計 ............................................................................................................ 9 、 I/O 地址分配 .................................................................................................... 9 、中間繼電器分配 ............................................................................................... 9 、整體系統(tǒng)工作流程 ....................................................................