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    RS232C-based Plug & Play Multiple Master Serial Communication
    基于RS232C的即插拔多主通信协议
    By making use of the HART protocol not only can retain the advantages of the traditional two wire system transmission, but also can realize multimaster communication, multipoint control and configuration control of remote field instruments.
    应用HART协议能使仪表既保留传统两线制传输的优点,并且还可实现多主通信、多点控制,易于对远距离现场仪表进行组态控制。
    Principle of chip microcomputer multi-host communication based on CAN bus and the interface between MT8816 and 89C51 chip microcomputer are introduced in this paper, and their applications in chip microcomputer communication switch system are also presented.
    介绍了基于 CAN总线的单片机多主通信原理、MT881 6模拟电子开关矩阵与 89C5 1单片机的接口 ,以及它们在单片机通信交换系统中的应用。
    Development of Sensor Node Based on Multi-master
    基于多主通信技术的传感器节点设计
    3. With knowing about the structure and the function assign to the intelligent nodes of the robotic excavator distribute control system, complete the hardware design of the intelligent nodes, and show the relevant key circuit design and pay attention to the problem of the hardware reliability and keeping disturbance, and complete the design and application of the communication net which is based CAN (Controller Area Network) bus.
    3、围绕挖掘机器人分布式控制系统的体系结构和功能分配,完成各智能子节点的硬件设计,给出了若干关键电路设计和探讨了硬件电路设计中的抗干扰和可靠性问题,完成了基于CAN总线的支持多主的通信网络设计和调试。
    Finally, in order to realize the communication between the intelligent release and the PC or between the intelligent release and the other control unit, two communication methods used by the RS-485 communication and CAN communication are discussed.
    最后,就TMS320LF2407本身具有的一个全双工的SCI串行口和一个CAN2.0模块,提出了基于RS-485总线标准的一主多从式串行通信和基于CAN总线的多主通信两种设计方案,以解决智能脱扣器和外界的通信问题,实现脱扣器的的集中控制和调度管理。
    The paper mainly researches all sorts of measuring and protecting arithmetic about intelligent release, which based on using FFT arithmetic to analyze the harmonic, and the way of using in DSP, also brings forward better measure to improve the errors about FFT arithmetic, discusses two communications methods used by the RS-485 communications and CAN communications, using SCI and CAN interface TMS320F2812 embed.
    课题主要研究了基于快速傅立叶变换(FFT)算法对电网谐波进行分析实现智能脱扣器的各种测量及保护算法的原理和在DSP上的实现方法,并对该算法存在的误差提出改善措施; 利用TMS320F2812的串行通信接口(SCI)和控制器局域网(CAN)模块,提出了基于RS-485总线标准的串行通信和基于CAN总线的多主通信两种设计方案。
    In the area of FCS(field-bus control system) ,with low cost, easy design and inherent multi-host-communication mechanism, CAN (Control Area Network) has witnessed the rapid development.
    在现场总线控制系统中,CAN总线由于其低成本、开发环境友好以及本身固有的多主通信机制得到了高速发展。
    CAN bus technology is used to implement a multiple master communication between transformer protection and monitoring device, thus a fully distributed microcomputerized protection, monitoring and supervisory system is structured. Functions of real time monitoring of the operational paramenter of electric oven transformer, anti time limit circuit protection and on line fault diagnosis are realized.
    应用CAN现场总线技术 ,实现变压器保护测控装置与监控主机的多主通信 ,构筑一个全分布式的微机保护测控与监控系统 ,实现电炉变压器的运行参数实时监测、反时限电流保护与在线故障诊断等功能。
    Because of many advantages of high real-time and reliability, strong anti-jamming ability,long distance of communication,high signaling rate,short messages frame,muli -master message broadcast mode and multiform communication medium, Controller Area Network (CAN) was widely applied in aerospace,marine,automobile,as well as all variety of industry automation control system. This paper presents a brief introduction to registers in CAN module of TMS320LF2407A, and discussion of the program on CAN communication.
    由于CAN具有实时性好、可靠性高、抗干扰能力强、传输距离远、通信速度快、采用短信息帧结构和多主通信方式以及可使用多种通信介质等许多优点,在航空、航海、汽车以及各种工业自动化控制系统中得到了广泛的应用,本文在介绍了DSP芯片TMS320LF2407A的CAN模块各寄存器含义的基础上,重点讨论了进行CAN通信时的编程方法。
    The circuit and topology of RS232C interface are investigated to reveal the mechanism of multiple callings from terminals,and the errors from a collision are studied. The calling strategy and frame formats for data communication,registering and quitting are designed to listen and identify a collision out of two or more calling occurred simultaneously. It shows that the communication strategy of Multiple Callings from terminals to central computer with RS232C protocol is feasible and reliable.
    研究了RS232C接口电气特性和DCS系统网络的工作特性,分析了并发帧碰撞发生机理及其导致的帧错误类型,定义了多主通信的帧格式和纠错方法,完成了并发帧碰撞侦听和纠错机制设计,实现了DCS系统中的即插拔和多主通信
 

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