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KEPServerEX V5 Help
DDE
Supported Formats
CF_Text
XL_Table
Advanced DDE
Network DDE
Overview
Although this server is first and foremost an OPC server, there are still a number of applications that require
Dynamic Data Exchange (DDE) to share data. As such, the server provides access to DDE applications that sup-
port one of the following DDE formats: CF_Text, XL_Table, and Advanced DDE. CF_Text and XL_Table are stand-
ard DDE formats developed by Microsoft for use with all DDE aware applications. Advanced DDE is a high
performance format supported by a number of client applications specific to the industrial market.
CF_Text and XL_Table
The DDE format CF_Text is the standard DDE format as defined by Microsoft. All DDE aware applications support
the CF_Text format. XL_Table is the standard DDE format as defined by Microsoft that is used by Excel. For more
information on DDE, refer to How To... Use DDE with the Server.
Advanced DDE
Advanced DDE is the DDE format defined by Rockwell Automation. Today, all Rockwell Client applications are
Advanced DDE aware. Advanced DDE is a variation on the normal CF_Text format, which allows larger amounts of
data to transfer between applications at higher rates of speed (and with better error handling).
Network DDE
Network DDE (Net DDE) is the standard for remote DDE connection as defined by Microsoft. It uses the CF_Text
format. For more information on Net DDE, refer to How to... Use Net DDE Across a Network.
Requirements
In order for the DDE interface to connect with the server, the Runtime must be allowed to interact with the desk-
top. For more information, refer to How To... Allow Desktop Interactions.
See Also: Project Properties - DDE
FastDDE/SuiteLink
Overview
FastDDE is a DDE format defined by Wonderware Corporation. It allows larger amounts of data to transfer
between applications at higher speed (and with better error handling) than generic DDE. SuiteLink is a
client/server communication method that has succeeded FastDDE. It is TCP/IP based and has improved band-
width and speed. Both FastDDE and SuiteLink are supported by all Wonderware client applications.
Note: The Wonderware connectivity toolkit is used to simultaneously provide OPC and FastDDE/SuiteLink con-
nectivity while allowing for quick access to device data without the use of intermediary bridging software.
Requirements
In order for the FastDDE interface to connect with the server, the Runtime must be allowed to interact with the
desktop. For more information, refer to How To... Allow Desktop Interactions.
See Also: Project Properties - FastDDE/SuiteLink
iFIX Native Interfaces
Overview
The iFIX Native Interface simplifies the connection task by allowing a direct connection to the local iFIX application
without the use of the iFIX OPC Power Tool. When supported, this interface also has the ability to refine the con-
nection between the server and the iFIX Process Database (PDB).
See Also: Project Properties - iFIX PDB Settings
Thin-Client Terminal Server
Overview
Windows Remote Desktop, which was formerly called Terminal Services, is a Microsoft Windows component that
allows users to access data and applications on a remote computer over a network. It also enables com-
munications servers to be configured via remote client machines.
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