Working With The Opc Ua Client; Displaying Sitop Psu8600 Parameters - Siemens SITOP PSU8600 Manual

Engineering and remote access
7.8 OPC UA server
7.8.5

Working with the OPC UA client

7.8.5.1

Displaying SITOP PSU8600 parameters

Browse nodes - display parameters
Input and output data - as well as the operating states of the SITOP PSU8600 - are
displayed in area "Address space" in a tree-like structure as nodes. The properties of a
marked node are displayed in area "Attributes".
Addressing OPC UA parameters
Addressing parameters in the OPC UA Server of the SITOP PSU8600 is based on the
unchanging BrowsePath (complete path made up of BrowseNames to a specific OPC UA
parameter; i.e. "BrowseName1.BrowseName2.BrowseName3"; for example
"Outputs.Output2.ActualState.ActualTargetVoltage") - and on the specific BrowsePath
dynamically assigned NodeId (for example "10270").
Please note that the link between BrowsePath and NodeId is re-established at each system
start and as a consequence can be variable. However, the link relationships between
BrowsePath and NodeId only change within the context of configuration changes (e.g. when
adding or removing system modules) or after firmware updates.
As a consequence it is recommended that OPC UA parameters are always addressed based
on the BrowsePath that does not change - or to automatically determine the NodeId of each
OPC UA parameter at each system start.
Note
Note: The OPC UA service "TranslateBrowsePathsToNodeIds" supports the determination
of the NodeId of a specific OPC UA parameter based on its BrowsePath.
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Power supply system SITOP PSU8600
Manual, 09.2018, A5E36758446-5-76