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Configuration
4.8 OPC UA
4.8.4
Properties of the OPC UA server
Identification and addressing
The following addressing and identification features of the OPC UA server of the gateway
apply.
● Application name, Application URI, Server URL, Port number of the application:
– See section OPC UA server (Page 68).
● Namespace of the gateway data points:
– CC7
● NodeID - Identifier:
The identifier of the NodeIDs of the data points of the "CC7" namespace is formed by the
server application of the gateway from the CPU name, the data block name and the data
point name:
– <
Subscriptions
For the number of subscriptions supported by the gateway as OPC UA server for
MonitoredItems, see section Configuration limits - communication (Page 18).
The data management of the subscriptions is stored in the RAM of the gateway.
If there is power down, all data and connection information of subscriptions is lost. After
restarting the server, the client needs to re-establish the connection and set up the
subscriptions again.
Deadband
When monitoring items in the "DataChangeFilter", the OPC UA server of the gateway uses
the filter "AbsoluteDeadband".
74
CPU name
DB name
>.<
Data point name
>__<
>
Operating Instructions, 10/2019, C79000-G8976-C503-02
SIMATIC CC7
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