OPC UA communication
9.1 What you need to know about OPC UA
Communication
Function Manual, 12/2017, A5E03735815-AF
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OPC UA servers provide information in the form of nodes. A node can be, for example, an
object, a tag or a method.
The example below shows the address space of the OPC UA server of an S7-1500 CPU
(extract from the OPC UA client "UaExpert" from Unified Automation).
Figure 9-1 Example of the address space of the OPC UA server of an S7-1500 CPU
In the figure above, the "MyValue" tag is selected (highlighted in gray).
This tag is located below the "Memory" node, which has the node class "Object".
"Memory" is below the "PLC_1" node (also an Object).
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