基于EtherCAT总线的Modbus-RTU主站网关设计  

Design of Modbus-RTU master station gateway based on EtherCAT bus

作　　者：王永峰 康晋菊 胡啸 张彪 封成玉 Wang Yongfeng;Kang Jinju;Hu Xiao;Zhang Biao;Feng Chengyu(Intelligence Technology of CEC Co.,Ltd.,Beijing 100083,China)

机构地区：[1]中电智能科技有限公司,北京100083

出　　处：《网络安全与数据治理》2024年第6期42-46,52,共6页CYBER SECURITY AND DATA GOVERNANCE

摘　　要：EtherCAT在国内工控领域被广泛应用,国内许多工业现场采用EtherCAT总线作为控制系统总线。Modbus也是一种标准开放的通信协议,许多仪器仪表、传感器、变频器支持Modbus协议,作为Modbus从设备被大量地应用于工控现场。为了解决工控现场EtherCAT总线与Modbus设备通信问题,设计了一种基于EtherCAT总线的Modbus-RTU主站网关模块,实现EtherCAT总线与Modbus协议的转化。该模块对外支持2路RJ45接口和1路DB9接口,其中RJ45接口支持EtherCAT协议,DB9接口支持Modbus-RTU主协议。模块通过2路RJ45接口灵活应用于EtherCAT网络中,可以配置链型和环型拓扑结构。EtherCAT is widely used in the field of industrial control in China,and many industry fields use it as the control system bus.Modbus is also a standard and open communication protocol,many instruments,sensors,and frequency converters support the Modbus protocol,as Modbus slave device is widely used in industrial control sites.In order to solve the communication problem between EtherCAT bus and Modbus equipment in industrial control field,a Modbus-RTU master station gateway module based on EtherCAT bus is designed,which realizes the conversion between EtherCAT bus and Modbus protocol.The design supports two RJ45 interfaces and one DB9 interface,the RJ45 interface supports the EtherCAT interface protocol,and the DB9 interface supports the Modbus-RTU main protocol.The design can be configured with chain and ring topologies structure through two RJ45 interfaces,so it can be flexibly applied in EtherCAT networks.

关 键 词：ETHERCAT Modbus-RTU主站 协议转化 拓扑结构 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]