基于RS485总线的BACnet MS/TP状态机实现  

Design of BACnet MS/TP state machine based on RS485 bus

作　　者：吴洪坤[1] 付小娟[1] 吴振远[1] 郭艳影 

机构地区：[1]广州民航职业技术学院飞机电子与部件系,广东广州510403

出　　处：《佛山科学技术学院学报（自然科学版）》2016年第3期65-69,共5页Journal of Foshan University(Natural Science Edition)

基　　金：广东省高等职业教育教学改革资助项目(20130301051)

摘　　要：对主从/令牌传递协议(BACnet MS/TP)的工作流程和工作状态转换过程由浅入深地进行了描述。该协议属于BACnet数据链路层协议,运行于RS485总线之上。通过对协议工作状态转换的深入分析,给出了MS/TP状态机的实现方法。经验证表明,基于该状态机采用C语言设计的软件在总线设备数量为60个,RS485波特率为38.4 kbps的条件下,工作稳定。The work process and work state transition of the master-slave / token passing protocol （BACnetMS/TP）were described developmentally in this paper. This protocol belongs to the BACnet data link layerprotocol, and runs on the RS485 bus. The realization method of MS/TP state machine was worked out throughanalyzing the work state transition of the protocol. After verification, a conclusion was obtained： the state machinedesigned using C language had a stable work performance under the condition of 60 bus devices and 38.4 kbps.

关 键 词：BACNET RS485 状态机 主从/令牌传递 

分 类 号：TU855[建筑科学]