ModBus网络是一个工业通信系统，由带智能终端的可编程序控制器和计算机通过公用线路或局部专用线路连接而成。其系统结构既包括硬件、亦包括软件。它可应用于各种数据采集和过程监控。(The ModBus network is an industrial communication system, which is made up of programmable terminals with intelligent terminals and computers connected through public lines or local private lines. Its system structure includes both hardware and software. It can be applied to all kinds of data acquisition and process monitoring.)