品牌:其他 | 規格:HP 5343A | 材質:HP 5343A |
產地:德國 |
HP 5343A
HP 5343A
HP 5343A
1、主站:wincc5應該帶有modbus通訊驅動,wincc6可以通過modbus opc server實現。從站:在s7200項目中添加modbus協議庫(microwin幫助中有詳細介紹)。主從站的通訊參數一致。
2、pc access其實就是一個s7 200 opc server(ppi),比採用modbus簡單易用,由於採用ppi協議,plc項目中不必另嵌通訊處理程序。
3、pc/ppi電纜也可以用市售的rs232/485轉換器代替。
WinCC與S7-200係列PLC通過PPI協議進行通信的實現。
PPI協議是西門子S7-200係列PLC常用通信協議,但WinCC中沒有集成該協議,即WinCC不能直接監控S7-200係列PLC組成的控制係統。S7-200 OPC Server是西門子公司推出的專為解決上位機監控S7-200係列PLC控制係統的接口軟件。因此,WinCC可以通過該軟件與S7-200係列PLC很方便的建立通信。
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