基于智能阀门定位器的EPA通信接口卡的开发

Developing the EPA communication interface based on an intelligent valve positioner

简述了工业控制网络的发展及EPA标准、智能阀门定位器,在此基础上对EPA接口卡的功能进行了分析,并提出了相应的实现方法。网络通信方面采用了浙大中控推出的EPA芯片,降低了开发难度,对EPA芯片的应用作了有益的尝试。同时介绍了EPA接口卡中其他外围电路的实现方法及开发中要注意的一些问题。实验证明文中所述方法的可行性。

The paper gives an introduction to the development of an industrial control network, the EPA standard and intelligent valve positioners, and then analyzes the function of the EPA interface card along with the way of implementing it. The paper also makes reference to a simple and convenient method to design the EPA interface by making use of the EPA chip. Experiments have proved that the said method is practical.