Siemens SIMATIC ET 200AL System Manual page 1384

Information on the server interface
The "OPC UA Server Interface" dialog is structured as a table and provides the following
information:
Note that not all columns are displayed initially. You determine what is displayed by right-
clicking on the header line of the table.
When a row is selected, you can display the OPC UA attributes of the node in the Inspector
window ("OPC UA attributes" area), such as node ID, node class, node type, and description.
• BrowseName
The language neutral name of the user-defined server interface is at the top
(BrowseName). This name can be freely selected.
The names (BrowseNames) of the individual OPC UA nodes that have been added to the
server interface are under the name of the interface.
You cannot change the name of an OPC UA node in this dialog. The names come from the
STEP 7 project.
You can delete an OPC UA node from the table. This means that it no longer belongs to
the server interface and is no longer visible to OPC UA clients.
• DisplayName
Similar to BrowseName. However, the name can be translated and is displayed, if
available, in the corresponding language.
• Node ID
NodeId of the OPC UA node, e.g. http://Server-Node_1; i=1
• Node type
Type of the OPC UA node, for example BOOL, BYTE, INT.
These node types were defined by Siemens, not by the OPC Foundation. For example, the
OPC Foundation uses the Boolean node type for BOOL. BOOL is directly derived from
Boolean.
The specified node type cannot be changed in this dialog: If you want to use a different
node type, you must change the type of the respective PLC tags in the STEP 7 project.
• Data type
The SIMATIC data type used in the STEP 7 project is specified, for example, Bool, Byte, Int.
etc.
• Access level
– If an OPC UA node is a tag (UAVariable type), the node can only be readable (RD) or
– If an OPC UA node is a method (UAMethod type), this node can always be called.
• Local data
The SIMATIC data type of the data block in the CPU, from which the value of an OPC UA
node (UAVariable type) is read, or to which a value is written.
Communication
Function Manual, 05/2021, A5E03735815-AJ
readable and writable (RD/WR).
OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
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