If unsuccessful, DMSUser is not an authenticated user on the OPC server computer. If successful, DMSUser is an authenticated user on the OPC server computer. To verify DMSUser is an authenticated user, log onto the OPC server computer with the DMSUser username and password. This section refers to the authenticated user as "DMSUser."ĭMSUser must be valid on the OPC server computer. Computer running DMS.īecause DMS accesses the OPC server, you must configure the service to run as an authenticated user, especially across a network. While testing your system, you may note that DMS connects and browses just fine when running on the OPC server, but cannot connect or browse when DMS is on one computer and the OPC server is on another. The DCOM configuration will depend on whether DMS and the OPC server are on the same computer or different computers. NOTE: To disable DCOM error logging, open the registry and reset the ActivationFailureLoggingLevel value and CallFailureLoggingLevel value to 0 (zero). In the Event Viewer, examine the System log and the Application log for DCOM errors.
Type CallFailureLoggingLevel and then press ENTER.ĭouble click the CallFailureLoggingLevel value, type 1, and then click the OK button.
Type ActivationFailureLoggingLevel and then press ENTER.ĭouble click the ActivationFailureLoggingLevel value, type 1, and then click the OK button. Right click the Ole key, click New | DWORD Value, and then do the following: In the Registry Editor, do the following:īrowse to the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole key. On the DMS computer, click Start | Run, type regedit, and then click the OK button.To enable DCOM error logging, do the following: For more information about DCOM error logging, see the Microsoft Support site at. Enabling DCOM Error Loggingīefore configuring DCOM, InfinityQS recommends enabling DCOM error logging in the computer registry and then restarting DMS to capture specific error information. If you are having trouble connecting DMS to your running OPC server or reading and writing OPC tag values, you may need to modify the DCOM settings on the DMS computer or the OPC server computer.
DCOM (Distributed Component Object Model) enables communication between the computer running DMS and the computer running the OPC server, allowing client and server to send and receive information across the same network.
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