Modbus 协议是应用于电子控制器上的一种通用语言。通过此协议，控制器相互之间、控制器经由网络（例如以太网）和其它设备之间可以通信。-Modbus protocol is used in an electronic controller on the common language. Through this agreement, between the controller, the controller via the network (eg Ethernet) and other devices can communicate.