Siemens SIMATIC ET 200AL System Manual page 1444

4. Double-click "Add new client interface".
STEP 7 creates a new client interface and display in the editor.
Figure 9-62 Adding OPC UA client interface
STEP 7 names the new interface "Client interface_1". If a "Client interface_1" already
exists, the new interface receives the designation "Client interface_2" etc.
In addition, STEP 7 creates the following data blocks:
– Client_Interface_1_Configuration
– Client_Interface_1_Data
5. Select a descriptive name for the new client interface.
Select "Productionline" in the example.
This also changes the names of the associated data blocks to:
– Productionline_Data
– Productionline_Configuration
6. To import an OPC UA server interface, click the "Import interface" button in the top right of
the editor.
This allows you to import an XML file which describes the server interface of an OPC UA
server.
Alternative: To determine online the server interface of a connected OPC UA server, see:
Determine server interface online (Page 331).
Communication
Function Manual, 05/2021, A5E03735815-AJ
The data block already contains all system data types that are needed for the
instructions of the OPC UA client.
This data block is filled when you configure the connection to the OPC UA server.
You configure a connection in the properties of the client interface, see: Example
configuration for OPC UA (Page 320).
A data block for the PLC tags that you want to read or write from an OPC UA server as
well as for methods that you want to call in the OPC UA server.
You use this data block in your user program.
This data block is currently still empty.
9.4 Using the S7-1500 CPU as an OPC UA client
OPC UA communication
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