西門子 300 plc 通過 MPI 通訊卡與組態(tài)王進(jìn)行通訊時，能否實(shí)現(xiàn)雙設(shè)備冗余的功能？
可以實(shí)現(xiàn)。
）一個 cp5611 卡可以連接兩臺 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 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)前面的號指 plc 的地址，后面是 cpu 所在的槽號。這兩個 plc 在 STEP7 編程軟件中是單獨(dú)定義的，所以除 plc 地址不一樣，槽號是一樣的；
3）在組態(tài)王中只須定義主設(shè)備的變量即可。
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)的通訊配置軟件和授權(quán)；
5）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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