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OPC90 Server User Manual V8.2.1
10.2 Configuring DCOM on the Remote OPC Client PC
Some OPC clients utilize a mechanism called “Data Callbacks” to receive data values
from an OPC server. For these types of clients, the remote PC must have its access
permissions enabled to receive the callbacks. If an OPC client can attach to the server
but not receive data values, this is a sign it relies on callbacks and therefore the PC
access permissions must be adjusted. Do the following procedure to make these
adjustments.
Run DCOMCNFG and select the DCOM properties of “My Computer” and set the
following default properties:
Select the COM Security tab shown as follows:
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