Development of a controller virtual maintenance system through the Internet

There is a great deal of benefits for control systems to adopt the Internet to, controller maintenance. This paper aims at developing a controller virtual maintenance system via the Internet to solve controller performance monitoring, controller fault detection and remote upgrading controller issues. The basic model of Internet-based virtual maintenance system has been proposed, which is very suitable for remote monitoring and controller maintenance applications. Several essential implementation issues of the system, including system architecture, network communication architecture and Web-based user interface, have also been discussed. A water tank system with a simple, PID controller has been used as a case study to illustrate the solution for the remote controller maintenance.