【正文】 中，潘老師在電梯控制功能及編程方面，又給了我很多寶貴的建議。在論文編排階段，潘老師又給我指出了很多的內(nèi)容組織上不足和錯(cuò)誤之處。畢業(yè)設(shè)計(jì)是一個(gè)系統(tǒng)化的工程，在這個(gè)過程中我遇到了很多無法靠自己能力以及知識(shí)儲(chǔ)備來解決的問題，盡管付出了很多努力，但是仍然無法沒有明顯的進(jìn)展，這使我明白了協(xié)同工作的重要性。一個(gè)人的知識(shí)面永遠(yuǎn)都是有限的，在接觸到一個(gè)全新的領(lǐng)域時(shí)，都會(huì)遇到很多棘手的問題，這是就要不斷地想別人請教和咨詢。這次的畢業(yè)設(shè)計(jì)不僅使我了解了很多新的知識(shí)，更重要的是我探索和獲取知識(shí)的能力的到了很大的提高，這跟老師們給我的指導(dǎo)也是分不開的。再一次感謝所有在畢業(yè)設(shè)計(jì)中曾經(jīng)幫助過我的良師益友和同學(xué)，以及在設(shè)計(jì)中被我引用或參考的論著的作者。 還要感謝華東交通大學(xué)所有老師在這大學(xué)期間給我的培養(yǎng)。不僅使我學(xué)到了很多新知識(shí)，更重要的是，使我建立起了一套完整的科學(xué)思考觀，正是有了這樣科學(xué)的分析和思考問題的方式，才能使我解決畢業(yè)設(shè)計(jì)中遇到的一系列問題，同時(shí)這在我以后的生活、學(xué)習(xí)和工作中也將起到舉足輕重的作用。最后，特別感謝各位老師在百忙中抽出時(shí)間評閱我的論文。謝謝大家支持。附 錄附錄1 語句表Network 1 // 四樓下呼LD O AN = Network 2 // 三樓上呼LD O LDN O ALD= Network 3 // 三樓下呼LD O LDN O ALD= Network 4 // 二樓上呼LD O LDN O ALD= Network 5 // 二樓下呼LD O LDN O ALD= Network 6 // 一樓上呼LD O AN = Network 7 // 電梯內(nèi)呼一樓LD O O T40AN = Network 8 // 電梯內(nèi)呼二樓LD O AN = Network 9 // 電梯內(nèi)呼三樓LD O AN = Network 10 // 電梯內(nèi)呼四樓LD O AN = Network 11 // 兩份鐘內(nèi)誤操作自動(dòng)返回一樓LDN AN AN TON T40, 1200AN AN = Network 12 // 平層信號(hào)LD O AN AN AN = Network 13 LD O AN AN AN = Network 14 LD O AN AN AN = Network 15 LD O AN AN AN = Network 16 // 轎廂在一樓時(shí)上行信號(hào)LD O O O O O O O A = Network 17 // 轎廂在二樓時(shí)上行信號(hào)LD O O O O A = Network 18 // 轎廂在三樓時(shí)上行信號(hào)LD O A = Network 19 // 轎廂上行信號(hào)LD O O = Network 20 // 轎廂上行LD ON A AN AN AN AN = Network 21 // 轎廂上行記憶信號(hào)LD O AN AN = Network 22 // 轎廂在四樓時(shí)下行信號(hào)LD O O O O O AN AN AN = Network 23 // 轎廂在三樓時(shí)下行信號(hào)LD O O O O A = Network 24 // 轎廂在二樓時(shí)下行信號(hào)LD O A = Network 25 // 轎廂下行信號(hào)LD O O = Network 26 // 轎廂下行LD ON A AN AN AN AN = Network 27 // 轎廂下行記憶信號(hào)LD O AN AN = Network 28 // 轎廂外呼信號(hào)保持LD O AN = Network 29 LD AN O AN = Network 30 LD AN O AN = Network 31 LD AN O AN = Network 32 LD AN O AN = Network 33 LD O AN = Network 34 // 轎廂內(nèi)呼保持LD O AN = Network 35 LD O A = Network 36 LD O AN = Network 37 LD O AN = Network 38 // 各樓層停車信號(hào)LD O AN A = Network 39 LD O O AN A = Network 40 LD O O AN A = Network 41 LD O AN A = Network 42 // 手動(dòng)及自動(dòng)開門LD O O T37O AN AN AN = Network 43 LD O O O LPSAN TON T37, 20LPP= Network 44 // 手動(dòng)及自動(dòng)關(guān)門LD O O T38AN AN = Network 45 LD TON T38, 50Network 46 LD O AN = Network 47 // 保持信號(hào)的取消LD = Network 48 // 電梯外呼信號(hào)的開門信號(hào)LD A LD O A OLDLD O A OLDLD A OLD=
附錄2 英語原文Programmable Logic Controllers (PLCS) 1 About Programmable Logic Controllers (PLCs) PLCs (programmable logic controllers) are the control hubs for a wide variety of automated systems and processes. They contain multiple inputs and outputs that use transistors and other circuitry to simulate switches and relays to control equipment. They are programmable via software interfaced via standard puter interfaces and proprietary languages and network options. Programmable logic controllers I/O channel specifications include total number of points, number of inputs and outputs, ability to expand, and maximum number of channels. Number of points is the sum of the inputs and the outputs. PLCs may be specified by any possible bination of these values. Expandable units may be stacked or linked together to increase total control capacity. Maximum number of channels refers to the maximum total number of input and output channels in an expanded system. PLC system specifications to consider include scan time, number of instructions, data memory, and program memory. Scan time is the time required by the PLC to check the states of its inputs and outputs. Instructions are standard operations (such as math functions) available to PLC software. Data memory is the capacity for data storage. Program memory is the capacity for control software. Available inputs for programmable logic controllers include DC, AC, analog, thermocouple, RTD, frequency or pulse, transistor, and interrupt inputs. Outputs for PLCs include DC, AC, relay, analog, frequency or pulse, transistor, and triac. Programming options for PLCs include front panel, hand held, and puter. Programmable logic controllers use a variety of software programming languages for control. These include IEC 611313, sequential function chart (SFC), function block diagram (FBD), ladder diagram (LD), structured text (ST), instruction list (IL), relay ladder logic (RLL), flow chart, C, and Basic. The IEC 611313 programming environment provides support for five languages specified by the global standard: Sequential Function Chart,