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探讨了火灾自动报警系统常见总线故障及其处理方法。描述了RS-485总线规范及影响RS-485总线通信速率和通信可靠性的若干因素,并就485总线应用中常见问题,分析了其产生原因并给出了解决问题的硬件方案和措施。
Discusses the common bus fault and its processing method of automatic fire alarm system. This paper describes the RS-485 bus specification and several factors that affect the RS-485 bus communication speed and communication reliability. It also analyzes the common problems in 485 bus applications, analyzes the causes and gives the hardware solutions and measures to solve the problems.