适用于变电站的CAN现场总线通信适配卡的设计  

Design of CAN Fieldbus Communication Adapter for Transformer Station

作　　者：朱华伟[1] 伍爱莲[1] 杨如锋[1] 肖涛[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电力系统及其自动化学报》2005年第5期86-89,共4页Proceedings of the CSU-EPSA

摘　　要：在基于现场总线的变电站综合自动化系统中,各个节点之间的通信以及节点与上位机之间的通信是系统的核心;适配卡把节点的数据上传到上位机,同时又把上位机的命令和数据下传到节点,是核心中的关键。本文提出一种新的适配卡设计方案,采用ISA接口,使用89C 52微处理器,SJA 1000作为通信控制器,并利用双口RAM作为PC机与控制器之间的数据交换通道,使用EPLD器件作为双口RAM的控制和中断信号处理。最后简要阐述了适配卡的软件设计。Measurement and control system for transformer station based on fieldbus is prevalent recently whose core is communication between nodes and between PC and node. The communication adapter is the key of the core. Data of nodes is transmitted to PC and command of PC is transmitted to nodes by adapter. In the adaper, ISA interface is equipped, 89C52 works as microprocessor and SJA1000 works as communication controller, dual-port RAM is used for the channel of data exchange between PC and CAN controller and EPLD is used to control two port RAM and process interrupt signal. Lastly, the software design of adapter is presented briefly.

关 键 词：现场总线 局域控制网总线 局域控制网通信适配卡 双口存储器 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]