摘  要：本文介紹利用協議轉換器(或稱為網橋、網關)實現西門子S7-1200/S7-1500 PLC與帶有MODBUS變頻器、儀表設備通訊接口進行方便、高效的數據交換。 關鍵詞：PROFINET   CMDC2PN9   PLC   網關 Abstract: In this paper, we use the protocol converter (or bridge, gateway) to realize the convenient and efficient data exchange between the SIEMENS S7-1200/S7-1500 PLC and the communication interface with the MODBUS transducer and instrument.  Key words: PROFINET &n[登陸后可查看全文]