CAN现场总线运行故障调试和分析

CAN总线以其高可靠性、长传输距离和低成本而具有巨大的应用潜力。但在网络的构建过程中或现场调试时，可能影响网络安全运行的因素较多，使CAN总线的应用受到限制。章从网络拓扑，终端电阻的匹配、CAN波形的选择、抗干扰和接地保护等几个对网络安全运行和通信质量有严重影响的关键方面来阐述网络的维护和故障的分析诊断。

Analysis of Malfunction Affecting Secure Operation of CAN Field Bus

CAN field bus has a vast potential by virtue of its high reliability at long transmission distance and low cost. In the course of formatting network or onsite test, some factors affecting on the safety of network make application of CAN field bus limited. Thus this paper presents several kinds of crucial ways, which sometimes severely impact secure operation and comunicative quality of the network, to explicate network safeguard and affect malfunction analysis malfunction from network construct, match of terminal resistor, CAN waveform selection and, resistance interference to joining ground of the system.