Chapter 10. OPC UA Server
194 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q
OPC UA Server – Application Information
The OPC Server publishes server capabilities within the address space. The information is contained under the
Application Information node in the address space (see below).
Figure 81: OPC UA Address Space - Application Information
The variables are defined in the table below.
Variable Name Description
Address Space Status Text string indicating variable publish status.
Maximum Elements Maximum application elements that can be published by the OPC UA server.
Application Variable (Non-Array): 1 variable = 1 element
Application Variable (Array): N-Array Dimension = N elements
Published Elements Number of elements currently published by the OPC UA Server
Published Variables Number of variables published by the OPC UA Server
Both published variables and arrays count as one Published Variable each,
regardless of the array dimension.
An example is displayed below.
The example above indicates the following about the PACSystems Controller.
Address Space Status = All Elements Published to Address Space
The number of published elements did not exceed the maximum allowed by the controller. Thus, all elements
were published. If the maximum had been exceeded, then elements would still be published up to the limit and
the text would change to:
Address Space Status = Maximum Published Elements Exceeded: Address Space Truncated
Maximum Elements = 12,500
Maximum Elements is the maximum number of application elements supported by this controller. In the
example above, that limit is 12,500 application elements.
Published Elements = 58
Published Elements is a count of how many application elements are currently being published. In the
example above, the number is 58 application elements.
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