总线技术和嵌入式控制器在称重系统中的应用  

Application of Bus Technology and Embedded Controller in Weighing System

作　　者：周耿烈[1,2] 胡赤兵[1] 吕红梅[3] 刘瑞玲[4] 

机构地区：[1]兰州理工大学机电工程学院 [2]兰州工业高等专科学校计算机工程系,兰州730050 [3]甘肃煤矿安全监察局信息调度中心 [4]兰州工业高等专科学校计算机工程系

出　　处：《自动化仪表》2007年第8期59-61,64,共4页Process Automation Instrumentation

摘　　要：简要介绍了RS-485总线、I-7188嵌入式控制器、WAGO750-842可编程现场总线控制器(PFC)的功能与特点。详细分析了称重控制器通信协议、系统软硬件设计以及通信功能的实现。利用RS-485和I-7188,实现了WAGO750-842对多台称重控制器的串行通信,达到了对分散设备的集中控制和计量数据的采集及自动上报功能。实际应用表明,该控制系统结构有着很好的容错性与稳定性,易于管理和扩充。The functions and the characteristics of RS-485 bus, 1-7188 embedded controller, and WAGO 750-842 progrmmnable fieldbus controller （PFC） are introduced briefly. The connurmication protocol of weighing controller, design of system hardware and software, and implementation of connnmlication fmlction are analyzed in detail. By using RS-485 and 1-7188, the serial communication between WAGO 750-842 and multiple weighing controllers is implemented. Thus the centralized control of the distributed equiplnent, acquisition and upload of the metering data are accomplished. The results of practical application show that the system features high stability and tolerance, also it is easy to be managed and expanded.

关 键 词：RS- 485总线 I-7188嵌入式控制器 可编程现场总线控制器(PFC) 智能仪表 串行通信 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]