產(chǎn)品

我們在各種場合看到了繼電器連接的控制，那已經(jīng)是時代的過去，如今的繼電器只能作為低端的基層控制模塊或者簡單的設備中使用到；而PLC的出現(xiàn)也成為了劃時代的主題，通過極其穩(wěn)定的硬件穿插靈活的軟件控制，使得自動化走向了新的高潮。
PLC的大特點在于：電氣工程師已不再電氣的硬件上花費太多的心計，只要將按鈕開關或感應器的輸入點連接到PLC的輸入點上就能解決問題，通過輸出點連接接觸器或繼電器來控制大功率的啟動設備，而小功率的輸出設備直接連接就可以。
PLC的內(nèi)部包含了具有中央處理器的，并帶有外部I/O口擴展的I/O接口地址和存儲器三大塊組成，的核心是由一個或者多個累加器組成，它們具有邏輯的數(shù)學運算能力，并能讀取程序存儲器的內(nèi)容通過計算后去驅動相應的存儲器和I/O接口；I/O口將內(nèi)部累加器和外部的輸入和輸出系統(tǒng)連接起來，并將相關的數(shù)據(jù)存入程序存儲器或者數(shù)據(jù)存儲器中；存儲器可以將I/O口輸入的數(shù)據(jù)存入存儲器中，并在工作時調轉到累加器和I/O接口上，存儲器分程序存儲器ROM和數(shù)據(jù)存儲器RAM，ROM可以將數(shù)據(jù)的存入存儲器中，而RAM只能作為計算時臨時計算使用的緩沖空間。
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