MODBUS协议实现一主机对多从机轮询的示例。在工装设计之前做了这么一个仿真示例，展示主机与从机之间应用简易的MODBUS 04命令进行轮询会话的过程。PROTEUS设计中有标示，程序中代码有注释，希望能对需要的朋友有所帮助。-MODBUS protocol of a host of many examples of polling from the machine. Done before the tooling design such a simulation example that sh