Description: Requests the value of item from a DDE-aware application and sends the data to the Advantech WebAccess/SCADA tag.
Syntax: <DDEREQUEST>tag=Server|topic!item
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.
<DDEREQUEST>text70=EXCEL|Sheet1!RSP
Example 2 - Get value from EXCEL spreadsheet from cell named RSP in workbook namedBook1.xls
<DDEREQUEST>text70=EXCEL|Book1.xls:Sheet1!REMOTESP
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.
Advantech WebAccess/SCADA 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.