The paper introduces the specific hardware and software realization of Modbus Tcp protocol in sling control communication based on Ethernet , examples of sling communication programs through Siemens PLC programming software , and prospect for future application of Modbus Tcp.%介绍了基于以太网Modbus Tcp协议在吊具通讯中的具体硬件和软件实现方式,并通过西门子PLC编程软件进行了通讯程序举例,最后对Modbus Tcp在未来的应用前景进行展望。
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