Description: Requests the value of item from a DDE-aware application and sends the data to the WebAccess tag.
Arguments: tagname, DDE Server name, DDE topic name, DDE item name, value, (remember - no blank spaces allowed)
See Also: <DDEPOKE>, <DDEEXECUTE>, </DDEREQUEST>
Examples: Example 1 - Get value from EXCEL spreadsheet from cell named RSP. EXCEL must be running and a single Workbook opened.
Example 2 - Get value from EXCEL spreadsheet from cell named RSP in workbook namedBook1.xls
This command gets data from a DDE application. You must know the DDESERVER name, the Topic Name and the Item name used in the DDE Server application. The DDE server application must be running.
WebAccess DDE Script and keymacro commands (which act as DDE Clients) must have access to the DDE Server they are reading or writing; the 3rd Party DDE Server application must be running on the SCADA Node PC or have a Network DDE connection (NetDDE) to the SCADA node.
Note The DDE Server and DDE client is disabled without the Hardkey. You cannot test, train or simulate with DDE.