In addition to the graphic window presentation on a Web browser, VDS also offers a host of functions to make operations easier.

VDS offers extensive graphic functions for building graphic windows that show the system at a glance, for efficient operation.

VDS's security functions can restrict access to writing data, running a program, and so on, to protect the system against unauthorized users. VDS also records a log of the actions taken at the system as a detailed audit trail. Even when accessing an on-site system via a Web browser, users must enter their user name and password for authentication.

Process alarms and user-defined messages can be viewed on the alarm summary display and announced using sound output in different ways depending on their importance, making them easy for operators to identify. These messages can be analyzed later on the historical message file and on a printout.

A trend graph of acquired and saved data can be pasted to a desired position on a graphic window so that the progression of data over time can be grasped. Trend data saved in VDS can also be exported to a CSV format file for preparing reports and in-depth analyses.