To offer a concise environment for developing applications, maximize throughput and facilitate maintenance, VDS has a simple software structure and functions for managing users' own programs.

From the functions for communicating with I/O devices to those for converting data into a Web-compatible format and transferring it for presentation on a Web browser, VDS consists of a simple, hierarchical structure of functions.

Functions for managing alarms and messages, which are crucial in equipment and process operation, and process management functions to run and quit various programs, can be developed effortlessly using standard tools. There is no need to develop management programs using Visual Basic or other programming languages.