【正文】 s7200 plc 的十字路口交通信號(hào)燈控制系統(tǒng)設(shè)計(jì) 3 目錄 基于 s7200 plc 的十字路口交通信號(hào)燈控制系統(tǒng)設(shè)計(jì) ................................. I 摘要 ......................................................................................................................... II 目錄 .......................................................................................................................... 3 1 設(shè)計(jì)任務(wù)描述 ........................................................................................................ 4 設(shè)計(jì)要求 ...................................................................................................... 4 基 本要求 ................................................................................................... 4 發(fā)揮部分 ................................................................................................... 5 2 設(shè)計(jì)思路 ............................................................................................................... 5 3 設(shè)計(jì)與分析 ............................................................................................................ 6 設(shè)計(jì)框圖 ............................................................................................................. 6 設(shè)計(jì)分析 ............................................................................................................. 6 4 硬件部分 ............................................................................................................. 8 PLC I/O 分配 ..................................................................................................... 8 系統(tǒng)的硬件結(jié)構(gòu)圖 ............................................................................................... 9 PLC 的接線形式 .............................................................................................. 10 5 軟件設(shè)計(jì)部分 ....................................................................................................... 11 梯形圖 .............................................................................................................. 12 語(yǔ)句表 ............................................................................................................... 15 6 PLC 概述 ........................................................................................................... 18 ..................................................................................................... 18 中央處理單元 (CPU) ........................................................................................... 18 存儲(chǔ)器 ............................................................................................................... 19 輸入 /輸出模塊 ................................................................................................... 20 圖 ............................................................................................................... 22 圖 ............................................................................................................... 22 7 元件清單 .............................................................................................................. 23 小結(jié) ........................................................................................................................ 24 致 謝 .................................................................................................................. 25 參考文獻(xiàn) ................................................................................................................. 26 基于 s7200 plc 的十字路口交通信號(hào)燈控制系統(tǒng)設(shè)計(jì) 4 1 設(shè)計(jì)任務(wù)描述 設(shè) 計(jì)題目： 基于 s7200 plc 的十字路口交通信號(hào)燈控制系統(tǒng)設(shè)計(jì) 設(shè)計(jì)要求 . 設(shè)計(jì)目的 可編程控制器是一種數(shù)字式的電子裝置，它使用可編程序的存儲(chǔ)器來(lái)存儲(chǔ)指令，并實(shí)現(xiàn)邏輯運(yùn)算、順 序運(yùn)算、記數(shù)和算術(shù)運(yùn)算等功能。 首先，南北方向道路處于禁止通行的狀態(tài)，東西方向道路處于允許通行的狀態(tài)。根據(jù)控制任務(wù)要求，運(yùn)用 step7 一 micro／ win32 軟件設(shè)計(jì)交通燈系統(tǒng)的梯形圖程序， 如圖 4。 [3] PLC存儲(chǔ)空間分配 各種PLCCPU最大尋址空間各不相同，PLC工作原理，其存儲(chǔ)空間一般包括以下三個(gè)區(qū)域： （1）系統(tǒng)程序存儲(chǔ)區(qū) （2）系統(tǒng)R AM存儲(chǔ)區(qū)（包括I/O映象區(qū)和系統(tǒng)軟設(shè)備等） （3）用戶程序存儲(chǔ)區(qū) [4] 系統(tǒng)程序存儲(chǔ)區(qū)：系統(tǒng)程序存儲(chǔ)區(qū)中存放著相當(dāng)于計(jì)算機(jī)操作系統(tǒng)系統(tǒng)程序?，F(xiàn)場(chǎng)的輸入信號(hào)，如按鈕開關(guān)，行程開關(guān)、限位開關(guān)以及傳感輸出的開關(guān)量或模擬量（壓力、流量、溫度、電壓、電流）等 ，都要通過(guò)輸入模塊送到PLC。 通過(guò)一周 的 PLC 設(shè)計(jì)實(shí)踐。感謝學(xué)校老師給我們提供實(shí)踐的機(jī)會(huì)和條件，能夠鍛煉自己的實(shí)際動(dòng)手能力，不僅停留在理論層面的學(xué)習(xí)，更要將所學(xué)轉(zhuǎn)化為一種能力和素質(zhì)，培養(yǎng)自己的工程實(shí)踐經(jīng)驗(yàn)，從最基礎(chǔ)的課程設(shè)計(jì)做起，為實(shí)際動(dòng)手操作，打?qū)嵒A(chǔ)，因?yàn)橹挥袑?shí)踐，才能出真知。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the