The communication between the upper compuer and the lower computer uses Modbus communication protocol and implements information exchange through the serial communication interface. 上、下位机通信采用Modbus通讯协议,通过串行通讯接口实现了用户程序的下载和信息交换。
Ethernet is a standard of connecting computers with the LAN and a communication protocol by which net devices exchange data. 以太网(Ethernet),既是一种计算机接入局域网络的连接标准,又是可以说是一种网络互联设备数据共享的通信协议。
With the designed communication protocol, the two MCU systems exchange data via serial asynchronous communication, and connect with the host computer through the RS-232C communication interface to provide support for MAO processing centers in the future. 配合所设计的通讯协议,两个单片机系统之间经由串行异步通讯交换数据,还可通过RS-232C通讯接口与上位机联接,为今后实现微弧氧化加工中心提供支持。
The article introduces the free Communication Protocol of PLC and realized the data exchange between intelligent instruments, PLC and computers. The method is flexible and can be used to restrain PLC from its internal special protocols. 采用PLC的自由通讯协议,实现PLC与智能仪器仪表和计算机之间的数据交换,具有很大的灵活性,避免了PLC的内部专用协议的限制。
Each fieldbus network has its own network information structure and communication protocol, so it is difficult to exchange data between different systems. 不同现场总线网络有各不相同的信息结构和通信协议,不便于各网络间的信息交换。