| 詳細(xì)參數(shù) | |||
|---|---|---|---|
| 品牌 | 富士 | 型號(hào) | FANUCA05B-2301-C305 |
| 結(jié)構(gòu)形式 | 整體式 | 安裝方式 | 現(xiàn)場(chǎng)安裝 |
| LD指令處理器 | 硬PLC | 加工定制 | 否 |
Fanuc A05B-2301-C305
可編程控制器由于其在工業(yè)控制方面的應(yīng)用意義日趨明顯，它具有編譯簡(jiǎn)單、功能強(qiáng)大、使用可靠、維修簡(jiǎn)單等許多優(yōu)點(diǎn)，并且在很多地方已逐步取代了繼電器電路的邏輯控制。與此同時(shí),智能化中央空調(diào)也正被廣泛地應(yīng)用,在將其倆雙雙結(jié)合的情況下,不僅促進(jìn)了科技的發(fā)展,也提高了人民生活水平。
關(guān)鍵詞： PLC控制系統(tǒng) 智能化 編程 控制器
1 概述
1.1 引言
隨著我國(guó)經(jīng)濟(jì)的不斷發(fā)展，社會(huì)高度信息化，新的高科技技術(shù)不斷應(yīng)用到各個(gè)方面中，使得智能化已成為一種發(fā)展的必然趨勢(shì)。智能化也往往是從設(shè)備自動(dòng)化系統(tǒng)開(kāi)始。本文主要根據(jù)個(gè)人工作經(jīng)驗(yàn)就一臺(tái)水冷螺桿機(jī)組來(lái)闡述PLC控制設(shè)計(jì)與智能化中央空調(diào)系統(tǒng)的關(guān)系。
1.2 PLC原理及應(yīng)用
中央空調(diào)冷凍系統(tǒng)的控制有3種控制方式：早期的繼電器控制系統(tǒng)、直接數(shù)字式控制器DDC以及PLC(可編程序控制器)控制系統(tǒng)。繼電器控制系統(tǒng)由于故障率高，系統(tǒng)復(fù)雜，功耗高等明顯的缺點(diǎn)已逐漸被人們所淘汰，直接數(shù)字式控制器DDC雖然在智能化方面有了很大的發(fā)展。但由于DDC其本身的抗干擾能力問(wèn)題和分級(jí)分步式結(jié)構(gòu)的局限性而限制了其應(yīng)用范圍。相反，PLC控制系統(tǒng)以其運(yùn)行可靠、使用與維護(hù)均很方便，抗干擾能力強(qiáng)，適合新型高速網(wǎng)絡(luò)結(jié)構(gòu)這些顯著的優(yōu)點(diǎn)使其逐步得到廣泛的應(yīng)用。
可編程控制器是計(jì)算機(jī)家族中的一員。于上個(gè)世紀(jì)中后葉被發(fā)明后，在機(jī)床、各種流水線(xiàn)的輸送機(jī)械、發(fā)電、化工、電子等行業(yè)工藝設(shè)備的電氣控制方面得到了廣泛的應(yīng)用，早期的可編程控制器被稱(chēng)作可編程邏輯控制器（Programmable Logic Controller）, 即簡(jiǎn)稱(chēng)為PLC。
PLC具有功能強(qiáng)大、使用可靠、維修簡(jiǎn)便等許多優(yōu)點(diǎn)。對(duì)于傳統(tǒng)的繼電器電路來(lái)說(shuō)，它難以實(shí)現(xiàn)復(fù)雜邏輯功能的和數(shù)字式控制，而且要實(shí)現(xiàn)一定規(guī)模的邏輯控制功能不僅設(shè)計(jì)繁瑣，難以實(shí)現(xiàn)升級(jí)，并易發(fā)故障，維修復(fù)雜，現(xiàn)在已被大中型設(shè)備的控制系統(tǒng)所拋棄。而PLC正被廣泛的應(yīng)用并且已逐步取代了繼電器電路的邏輯控制。隨著科學(xué)技術(shù)不斷的飛躍發(fā)展，PLC也不斷得到完善和強(qiáng)大，同時(shí)它的功能也大大超過(guò)了邏輯控制的范圍，如聯(lián)網(wǎng)通信功能和自診斷功能等。因此今天這種裝置被我們稱(chēng)作可編程控制器，不過(guò)我們還是習(xí)慣簡(jiǎn)稱(chēng)這種裝置為PLC。
2 PLC的體系結(jié)構(gòu)
PLC結(jié)構(gòu)圖
PLC實(shí)質(zhì)上是一種被專(zhuān)用于工業(yè)控制的計(jì)算機(jī)，其硬件結(jié)構(gòu)和微機(jī)是基本一致的。如圖2.1.1所示：圖2.1.1 PLC硬件的基本結(jié)構(gòu)
PLC主要是模塊式的，包含CPU模塊、IO模塊等，PLC一端接 傳感器，另一端接執(zhí)行器，從傳感器得到的數(shù)據(jù)經(jīng)PLC讀、運(yùn)算等處理下達(dá)給執(zhí)行器，執(zhí)行器動(dòng)作。PLC相當(dāng)于繼電器的作用，其好處是可靠性高，自動(dòng)化程度高、可進(jìn)行網(wǎng)絡(luò)化等。
3 PLC控制系統(tǒng)主要功能與特點(diǎn)
3.1 PLC控制系統(tǒng)功能說(shuō)明
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