GE RX3i User Manual page 206

Chapter 10. OPC UA Server
The Server node can then be used to access server-specific information. For example, the node Server 
ServerStatus  Buildinfo (see below) contains information specific to the OPC UA server.
Figure 79: Server Specific Address Space
The address space entries under BuildInfo can be accessed to learn more information for a specific controller.
Placing the variables in a subscription allows easy access to variable values (see screenshot below).
Figure 80: BuildInfo Subscription
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