1756-OB16I   PLC 的優(yōu)點
 
　　1.1 可靠性高，抗干擾能力強
　　可靠性是電氣設(shè)備的關(guān)鍵性能。 在 PLC 的設(shè)計和制造過程中， 由于采用了現(xiàn)代大規(guī)模集成電路技術(shù)和嚴(yán)格的生產(chǎn)工藝來制造內(nèi)部電路，PLC 具有先進的抗干擾能力，使用 PLC 的平均無故障時間通常在 20 000 小時以上，這是一般的其他電氣設(shè)備做不到的。
 
　　1.2 配套齊全，功能完善，適用性強
　　雖然 PLC 的種類繁多， 但由于其產(chǎn)品的系列化和模塊化，且軟件包齊全， 用戶可靈活組成各種規(guī)模和要求不同的控制系統(tǒng)。除了邏輯處理功能外，現(xiàn)代 PLC 大多具有完善的數(shù)據(jù)運算能力，可用于各種控制領(lǐng)域。 近年來 PLC 的功能單元大量涌現(xiàn)，使PLC 的應(yīng)用擴展到了位置控制、溫度控制、CNC 等各種工業(yè)控制中。加上 PLC 通信能力的增強及人機界面技術(shù)的發(fā)展，使用 PLC組成各種控制系統(tǒng)變得更加容易。
 
　　1.3 編程語言易學(xué)易用
　　PLC 一般采用易于理解和 掌握的梯形圖語言及面向工業(yè)控制的簡單指令編寫程序，易于為工程技術(shù)人員所接受。 梯形圖語言的圖形符號和表達(dá)方式與繼電器電路圖相當(dāng)接近， 只用PLC 的少量開關(guān) 量邏輯控制指令就可以方便地實現(xiàn)繼電器電路的功能，為不熟悉電子電路、不懂計算機原理和匯編語言的人打開了方便之門。
 
　　1.4 維護工作量小，維修方便
　　PLC 用存儲邏輯代替接線邏輯 ，大大減少了控制設(shè)備的外部接線。 同時具有很強的自我診斷能力， 能隨時查出自身的故障，并顯示給技術(shù)人員，使技術(shù)人員能迅速檢查、判斷故障的原因。如果是 PLC 自身的原因，在維修時只需更換插入式模塊及其它易損壞的部件即可，既方便又減少了影響生產(chǎn)的時間，使維護也變得容易起來。


張工0592-5072116  18006003563  商務(wù)QQ：565167042 
   

  
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