Databases and Data Access

At the core of VTS lies a system of data storage and sharing. VTS uses a series of databases to store data such as the properties of tags, copies of tag data for the purposes of offline changes, locking information for resource items belonging to a networked or remote application, and alarm events within an application.

VTS also enables you to record tag data values, and plot the logged data or export it to other data sources for analysis and review. The capabilities of VTS also extend to sharing of data between VTS and another running application such as Microsoft Excel, using Dynamic Data Exchange (DDE), and exchanging data between an OPC server and a VTS application using an OPC client driver. This section and the sections that follow will provide you with fundamental information on the databases used in VTS, and working with data.