一种基于新型RS485总线的楼宇自控系统  

Building Automation System Based on a New Type of RS485 Bus

作　　者：宋晓伟[1] 解大[1] 舒晓琼 戴维 庄骏鹏 何伟 

机构地区：[1]上海交通大学电气工程系,上海市200240 [2]上海飞平电子技术有限公司,上海市201109

出　　处：《建筑电气》2008年第6期37-41,共5页Building Electricity

摘　　要：提出了一种采用RS485总线的楼宇自控系统的实现方案,完成了终端I/O模块、区域汇集器模块以及中心接入器模块的软硬件设计。区域汇集器模块中通过共享RAM和非破坏性总线仲裁技术对传统RS485总线进行改进,使其具有多主结构,传输速度和稳定性大大提高。该技术与Lonworks相比不需要专用芯片,造价大大降低。In this paper, a scheme of building automation system based on RS485 bus is proposed, which includes the software and hardware design of the terminal input and output modules, region compiler and central hub modules. In the design of region compiler module, the RS485 is updated through the technology of shared RAM and non-destructive bus arbitration technology to make it possess the multiple host structure. It＇s speed and reliability of transmission is largely improved. Compared with Lonworks, the cost of this technology is greatly reduced because of no special chip.

关 键 词：RS485 楼宇自控系统 内存共享 多主结构 总线竞争 

分 类 号：TU855[建筑科学] TP273[自动化与计算机技术—检测技术与自动化装置]