PLC的應(yīng)用面廣、功能強(qiáng)大、使用方便，已經(jīng)成為當(dāng)代工業(yè)自動(dòng)化的主要裝置之一，在工業(yè)生產(chǎn)的所有領(lǐng)域得到了廣泛的使用，在其他領(lǐng)域(例如民用和家庭自動(dòng)化)的應(yīng)用也得到了迅速的發(fā)展。

       電工委員會(huì)(IEC)在1985年的PLC標(biāo)準(zhǔn)草案第3稿中，對(duì)PLC作了如下定義：“可編程序控制器是一種數(shù)字運(yùn)算操作的電子系統(tǒng)，專為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)。它采用可編程序的存儲(chǔ)器，用來在其內(nèi)部存儲(chǔ)執(zhí)行邏輯運(yùn)算、順序控制、定時(shí)、計(jì)數(shù)和算術(shù)運(yùn)算等操作的指令，并通過數(shù)字式、模擬式的輸入和輸出，控制各種類型的機(jī)械或生產(chǎn)過程。可編程序控制器及其有關(guān)設(shè)備，都應(yīng)按易于使工業(yè)控制系統(tǒng)形成一個(gè)整體，易于擴(kuò)充其功能的原則設(shè)計(jì)。"從上述定義可以看出，PLC是一種用程序來改變控制功能的工業(yè)控制計(jì)算機(jī)，除了能完成各種各樣的控制功能外，還有與其他計(jì)算機(jī)通信聯(lián)網(wǎng)的功能。

公司名稱：福建中立恒自動(dòng)化設(shè)備有限公司

地址：福建省福州市鼓樓區(qū)溫泉街道五四路9號(hào)寧德大廈（宏福大廈）10層1064室

西門子 300 plc 通過 MPI 通訊卡與組態(tài)王進(jìn)行通訊時(shí)，能否實(shí)現(xiàn)雙設(shè)備冗余的功能？

可以實(shí)現(xiàn)。

）一個(gè) cp5611 卡可以連接兩臺(tái) s7300plc（使用西門子廠家提供的可編程插頭來實(shí)現(xiàn)）；

2）在組態(tài)王軟件中建立兩個(gè) s7300plc，設(shè)備地址分別設(shè)備為 7.2 和 8.2（設(shè)備地址根據(jù)實(shí)際設(shè)備來設(shè)置），小數(shù)點(diǎn)前面的號(hào)指 plc 的地址，后面是 cpu 所在的槽號(hào)。這兩個(gè) plc 在 STEP7 編程軟件中是單獨(dú)定義的，所以除 plc 地址不一樣，槽號(hào)是一樣的；

3）在組態(tài)王中只須定義主設(shè)備的變量即可。

  可當(dāng)天發(fā)貨！    

組態(tài)王和西門子 300、400PLC 通訊支持哪些通訊鏈路？是否需要西門子軟件的支持？

1）MPI 電纜通訊方式：組態(tài)王所在的計(jì)算機(jī)必須安裝 STEP7 編程軟件；

2）MPI 通訊卡方式：組態(tài)王所在的計(jì)算機(jī)必須安裝 STEP7 編程軟件；

3）以太網(wǎng)通訊方式：不需要在組態(tài)王所在的計(jì)算機(jī)上安裝 STEP7 或 Simatic net 通訊軟件；

4）Profibus－DP通過方式：需要在本機(jī)上安裝 STEP7 編程軟件和 Simatic net 6.0(或以上版本)的通訊配置軟件和*；

1. Profibus－S7通過方式：需要在組態(tài)王所在的計(jì)算機(jī)上安裝 STEP7 編程軟件 ，但不需要安裝SIMATIC NET 軟件

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