Publish Application Variables To Opc Ua Address Space - GE RX3i User Manual

Publish Application Variables to OPC UA Address Space

Machine Edition allows you to select application variables to include in the OPC UA address space. This is done
by means of the variable's publish attribute. The publish attribute is accessed using the variable Inspector
within Machine Edition. The Machine Edition variable Inspector is displayed in the screenshot below for
reference.
The available PME Publish attribute selections are as follows as they apply to the OPC UA server:
Selection Description – OPC UA Server Specific Usage
False Variable is not published to OPC UA Address Space
Internal Variable is not published to OPC UA Address Space
External Publish variable to OPC UA address space and allow the OPC UA
Read/Write client Read and Write Access
External Publish variable to OPC UA address space and allow the OPC UA
ReadOnly client Read Access only
Note: The Controller's OPC UA address space supports 12,500 addressable elements. If more than
12,500 addressable elements are published, only the first 12,500 (listed alphabetically) will be
made available in the OPC UA address space. Each index of a variable array counts as a
unique addressable element.
The OPC UA server regenerates the address space only at startup. Thus, adding a new variable or modifying an
existing variable publish attribute requires the server to perform the startup sequence. In most cases, the
controller performs this function for you. Please reference section 10.1.1, OPC UA Server – Service Request –
RESTART for additional details on server restart functionality.
The published application variable is accessible by the client. One method is to browse the address space,
opening the Application node displayed in the screenshot below.
GFK-2224Q
Figure 76: Machine Edition Variable Inspector
January 2017
Chapter 10. OPC UA Server
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