"FX2N系列可编程控制器通讯技术及应用指南"

FX2N series programmable controller communication technology.ppt; FX2N series programmable controller communication technology.ppt; Application technology of programmable controller Chapter 11 FX2N series programmable controller communication technology outline  Basic knowledge of network communication  Hardware and communication forms of FX2N series PLC communication  Configuration and application examples of communication between FX2N series PLCs Contents 2 Overview of the content and application of communication and network of programmable controllers is a rapidly developing technology in the field of industrial automation in recent years. This chapter briefly introduces the communication technology of FX2N series programmable controllers with various digital devices, including system configuration, connection methods, communication instructions, and their applications. Examples of communication between PLCs are provided. Section 1 Basic knowledge of network communication 一、Data communication foundation 1.1 Data transmission method (1) Parallel communication and serial communication ① Parallel communication Parallel communication is a communication method in which the data transmitted is sent or received simultaneously by each bit. ② Serial communication Section 1 Basic knowledge of network communication Figure 11-1 Parallel communication and serial communication Section 1 Basic knowledge of network communication (2) Synchronous transmission and asynchronous transmission Communication transmission is classified according to synchronous methods  Synchronous transmission  Asynchronous transmission Section 1 Basic knowledge of network communication Figure 11-2 Communication transmission format Section 1 Basic knowledge of network communication 2. Data transmission direction When serial communication is used, on the communication line; "。。。"