摘  要：本文介绍利用协议转换器(或称为网桥、网关)实现西门子S7-1200/S7-1500 PLC与带有MODBUS变频器、仪表设备通讯接口进行方便、高效的数据交换。 关键词：PROFINET   CMDC2PN9   PLC   网关 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[登陆后可查看全文]