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

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.