The features of building web applications of data support of automatic control systems

The article focuses on development telecommunication functions providing remote control of technological processes, their visualizing, and executive mechanisms of different processing facilities (e.g. executive mechanisms of a small-size dryer created in Murmansk State Technical University in order to smoke and dry fish). The solution of the problem became possible due to the web application developed according to ASP (Active Server Pages) technology and used on top the web-server controlled by IIS (Internet Information Services), Microsoft. The advantage of the web-application is that it allows logging onto the automated control system irrespective of a small-size dryer location (i.e. working place is mobile), and technological process control is possible from any mobile platforms and operational systems. Due to using MS SQL Server Express it became possible to organize nonstop data exchange between automatic system of the small dryer and the end user (simultaneous work of several users is possible). The article presents the scheme of the user and web-application interface. Class of the project safety (III) has been determined, as well as corresponding basic protection measures, which provide implementing the user identification and authentication systems, antivirus and network intrusion systems. Project costs proved to be lower than the cost of software TRACE MODE Data Center (35.000 rubles instead of 58.000 rubles), which is found a truly sustainable solutions to realize a remote access to the automation facility. A growing number of users doesn’t affect the final cost of the project.