Research of Internet based supervisory control and information system

摘要

In general the idea of remote monitoring of various equipments and devices over the Internet is becoming a desirable practice in the process plants industries over the few decades. Over the years, there has been constant increase in the development of industrial automation through remote monitoring and diagnosis virtually through computers and Internet. The strong emphasize on the automatic XML report generation for the real-time process in both online and offline mode is the main focus of this system. The Internet based automation is made possible by the use of PLCs (Programmable Logic Controllers), SCADA (Supervisory control and Data Acquisition), VPN (Virtual Private Networks) and other network elements. The system is developed using SCADA software, PLC programs for controlling the real-time process and VBA / front page scripts for management information system. As a result the system will be more secured with the use of XML encoding and the data is protected by using only VPN via GSM for connection between the server and client and the individual monitoring device. The Reporting of the real-time data corresponding to the process plants can therefore be of great use for future analysis as well as for the Management level Information Systems.