IDEC WindSRV - Manual (Page 10)

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OPC client applications in use today still support this original specification, OPC Data Access 2.0 enhanced OPC to better
utilize the underlying Microsoft COM technology. Most OPC client applications support version 2.0 of the OPC
specification. OPC Data Access 3.0 is the latest version of the OPC DA interface.
Dynamic Data Exchange (DDE)
The DDE format CF_Text is the standard DDE format as defined by Microsoft. All DDE aware applications support the
CF_Text format. The DDE Format XL table is the standard DDE format as defined by Microsoft that is used by Excel. For
more information on using DDE, refer to
How To Use DDE with the Server .
Network DDE (Net DDE)
Net DDE is the standard for remote DDE connection as defined by Microsoft. It uses the CF_Text format. For more
information on using Net DDE, refer to
How to Use Net DDE Across a Network .
Advanced DDE
Advanced DDE is the DDE Format defined by Rockwell Automation. All Rockwell Client applications are still Advanced
DDE aware today. Advanced DDE is a variation on the normal CF_Text format. Advanced DDE allows larger amounts of
data to transfer between applications at higher rates of speed and with better error handling than a normal CF_Text
DDE link.
FastDDE/Suite Link
FastDDE is the DDE format defined by Wonderware. FastDDE allows larger amounts of data to transfer between
applications at higher speed and with better error handling than normal DDE. SuiteLink is the next generation of client
server communication. It is TCP/IP based, has improved bandwidth and speed and it configures similarly to FastDDE. All
Wonderware Client Applications support FastDDE and SuiteLink.
iFIX Native Interface
The iFIX Native Interface allows a direct connection with GE FANUC's iFIX application without the use of the iFIX OPC
Power Tool, thus simplifying the overall connection task. Support for this interface includes the ability to refine the
connection between the server and iFIX Process Database (PDB).
Components
The server implements client/server architecture. The components include Configuration, Runtime, Administration and
Event Log.
Configuration
The Configuration is the client-user interface that is used to modify the Runtime's project. The Configuration can be
launched by multiple users and will eventually support remote Runtime configuration.
Runtime
The Runtime is the server component that starts as a service by default. Clients can connect to the runtime remotely or
locally.
Administration
The Administration is used to view and/or modify settings and launch applications that pertain to user management and
the server. By default, the Administration is started and sent to the system tray when a user account logs onto the
operating system.
Event Log
The Event Log service collects information, warnings and error events. These events are then sent to the
Configuration's Event Log window for viewing.
Process Modes
The Runtime's process mode can be changed while the server is running; however, doing so while a client is connected
will interrupt the connection for a short period of time. The modes of operation are System Service and Interactive.
System Service
By default, the server is installed and runs as a service. When System Service is selected, the Runtime does not require
user intervention and will start when the operating system opens. This provides user independent access to the server
by the clients.
Interactive