现场总线的多路模拟量输出从站的设计与实现  

Design and Implementation of Multi-analog Output Slave Nodes Based Fieldbus

作　　者：刘清[1] 

机构地区：[1]南京师范大学计算机科学系

出　　处：《仪表技术与传感器》2003年第11期43-44,54,共3页Instrument Technique and Sensor

摘　　要：采用控制局部网络(CAN)和分散计算机控制技术,成功地研制了CAN总线的多路模拟量输出从站,从站被用于水电站仿真系统中。针对仿真系统模拟量输出多通道、慢速率的特点,设计一个基于存储器动态刷新的多路模出从站。从站采用64个输出通道共用1个D/A,刷新不占用CPU时间,由控制电路产生,通过CPU和控制电路共享存储器实现模拟量的输出保持和更新。CAN bus Multianalog output slave node is successfully developed by using Controller Area Network and distributed computer control technology.The node is used in simulation system of the hydroelectric power station.It is a dynamically refreshed multianalog output system which contains 64 analog output sharing one DAC converter.CPU and a control circuits sharing the same memory implements analog output keeping and updating.The memoryrefresh is accomplished by a control circuits.

关 键 词：现场总线 多路模出 动态刷新 存储器共享 CAN总线 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]