Exchanging data via DDE

CitectSCADA runtime can exchange data as a DDE server or a DDE Client.

CitectSCADA behaves as a DDE server when providing other applications with access to its data. When acting as a DDE server, CitectSCADA runtime can:

• Provide DDE access to the complete variable tag database automatically with no further setup necessary
• Provide access to selected variable values by posting select CitectSCADA data using DDE

CitectSCADA behaves as a DDE client when requesting other applications to provide access to their data. When acting as a DDE Client, CitectSCADA runtime can:

• Read data directly from another application
• Write data directly to another application

• Note: You can also execute commands in another application from CitectSCADA with the DDEExec() function. Similarly, you can run Cicode functions from another application by passing the functions through that application's DDE Execute command.

See Also