求一篇关于opc技术的英文文献

Human Machine Interface Using OPC (OLE for Process Control)
Anwar, M.R. Anwar, O. Shamim, S.F. Zahid, A.A.
BE-CIS, NED University of Engineering & Technology. raafay_anwar@ieee.org;

This paper appears in: Engineering, Sciences and Technology, Student Conference On
Publication Date: 30-31 Dec. 2004
On page(s): 35- 40
ISBN: 0-7803-8871-2
Posted online: 2006-01-03 13:49:31.0

Abstract
This paper discusses Human Machine Interface HMI System, OLE for Process Control (OPC) and their roles, coordination and functionality in Industrial Automation Technology. HMI is software that provides a front end to the industrial automation system. It basically consists of components that represent industrial devices e.g. Motors, Pumps, Valves, and Dampers etc. Here we have used OPC (OLE for process control) as an Interface Layer between industrial devices and HMI. Moreover a Database is also required to store process values for components