DDE Driver Tags
The DDE driver allows tags to read from and write to a local or network DDE server.
Specific instructions on configuring VTS as a DDE server and as a DDE client are provided elsewhere in this guide. See: Sharing Data between VTS and External Applications
Note: The DDE acronym represents the term Dynamic Data Exchange; an inter-process communication system built into the Windows operating systems. DDE enables two running applications to share the same data. For example, DDE makes it possible to insert a spreadsheet chart into a document created with a word processor; whenever the spreadsheet data changes, the chart in the document changes accordingly.
The characteristics of the DDE driver are described in the table below.
DDE Driver Characteristics
Tag Browser Name: DDE Driver
Database Table Name: Deriver
Type: Driver
Tag Group Memberships: Drivers, Numeric
Log Enabled Variables: see Communication Driver Log-enabled Variables
Native Drawing Methods: DDE Driver Tag Drawing Methods
DDE Driver Tag Type Properties: ID Tab