基于PLC雙電源開關(guān)設(shè)計
（此畢業(yè)論文共11241字，26頁）
目 錄
摘要…………………………………………………………………………………………………I
Abstract……………………………………………………………………………………………II
第1章 緒論………………………………………………………………………………………1
1.1引言…………………………………………………………………………………2
1.2設(shè)計的要求………………………………………………………………………………3
1.2.1 設(shè)計的基本原則
1.2.2 設(shè)計的主要內(nèi)容
1.2.3 PLC控制系統(tǒng)的一般設(shè)計步驟
第2章 基于PLC雙電源開關(guān)總體方案設(shè)計………………………………………………5
2.1 引言………………………………………………………………………………………6
2.2 設(shè)計要求…………………………………………………………………………7
2.3 總體方案的確定………………………………………………………………………8
第3章 基于PLC雙電源開關(guān)控制系統(tǒng)硬件設(shè)計………………………………………11
3.1 引言
3.2 電氣控制方案設(shè)計
3.3 PLC型號的選擇
3.4 特殊功能模塊的選擇
第4章 基于PLC雙電源開關(guān)控制系統(tǒng)軟件設(shè)計
4.1 引言……………………………………………………………………………14
4.2 PLC控制系統(tǒng)程序設(shè)計主要步驟……………………………………………15
4.3 流程圖設(shè)計…………………………………………………………………17
4.4 梯形圖設(shè)計…………………………………………………………………18
4.5 PLC程序語句表…………………………………………………………………21

第5章 心得體會…………………………………………………………………22
結(jié)論…………………………………………………………………………………………23
參考文獻(xiàn)……………………………………………………………………………………24
致謝…………………………………………………………………………………………25
附錄…………………………………………………………………………………………26

摘要：隨著人們對供電可靠性要求越來越高，很多場合需要用兩路電源來保證供電的可靠性，這就需要一種雙電源切換器在兩路電源之間進(jìn)行可靠切換。采用可編程控制器(PLC)解決這類問題具有獨(dú)特的優(yōu)勢，在電氣自動化方面具有廣闊的應(yīng)用前景和很大的市場潛力。與傳統(tǒng)繼電控制系統(tǒng)相比較，可編程控制器(PLC)的優(yōu)勢在于：體積小型化，高度集成，同時還有數(shù)字運(yùn)算、數(shù)據(jù)處理和數(shù)據(jù)通訊功能。PLC作為新一代的工業(yè)控制裝置，結(jié)構(gòu)簡單、性能全面、可靠性高。本課題是基于可編程控制器的雙電源開關(guān)設(shè)計，用以實現(xiàn)雙電源開關(guān)的自投自復(fù)，缺相和欠壓保護(hù)，使之可以適應(yīng)用電要求較高企業(yè)的需求。本文分析了基于PLC的雙電源開關(guān)的設(shè)計理念，設(shè)計方法，主要闡述了系統(tǒng)硬件、軟件的設(shè)計。

關(guān)鍵詞：雙電源切換；PLC；數(shù)據(jù)處理；缺相和欠壓保護(hù)

PLC-based design of dual-power switch

Abstract: With increasing demands for high reliability, a number of occasions the need to use two power supplies to ensure reliability of electricity supply, which requires a dual power switch between the two reliable switching power supply. The use of programmable logic controller (PLC) to solve this problem has a unique advantage in electrical automation applications have broad prospects and great market potential. Relay control system with the traditional, compared to programmable logic controller (PLC) has the advantage of being: the volume of smaller, highly integrated, but also the number of computing, data processing and data communication functions. PLC as a new generation of industrial control devices, simple structure, the performance of a comprehensive, high reliability. This topic is based on the programmable logic controller design of dual-power switch, dual power switch for the automatic switch from the complex, lack of phase and under-voltage protection, so that electricity can be adapted to the needs of demanding enterprises. This paper analyzes the PLC-based dual-power switch design, design methods, mainly on the system hardware and software design.

Key words: dual-power switch; PLC; data processing; missing phase and undervoltage protection