Siemens SIMATIC ET 200AL, System Manual

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OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Communication
Function Manual, 05/2021, A5E03735815-AJ
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Display of multilingual texts
When importing a server interface, the available multilingual texts are saved internally and
downloaded to a CPU together with the project.
The client editor displays the text from the OPC UA XML file in the columns "Name of the
node" (corresponds to "DisplayName") and "Description" (corresponds to "Description").
The following cascading rules determine which language is shown for a node:
•
When the node contains text in the currently used editing language, the text is also
displayed in the editing language.
(Setting the editing language: In the project tree, select the area "Languages & resources >
Project languages")
• When the node does not contain text in the editing language but a default text is defined
there (without language code), the default text is displayed.
• "Name of the node" column: If no default text is defined either but a text in any other
language exists, the DisplayName text is displayed in the first available language. This rule
does not apply to description texts.
• If none of the conditions listed above is met, no text is displayed.
Figure 9-73 Display for multilingual texts
When you change the editing language, the multilingual text in the imported interface will
also change according to the rules explained above.
You can then apply the nodes in the corresponding lists (read list, write list, method list) with
drag and drop.
You cannot change the language in the lists (read list, write list, method list).
Applying the displayed description texts as comment in PLC data types
When you compile the program, STEP 7 automatically creates PLC data types (UDTs) for each
read list, for each write list and for inputs or outputs of each method. These UDTs each have
one element for each node.
The UDTs apply the description text as comment according to the rules stated above. STEP 7
creates the comment in only one language, just like the texts in the OPC UA server interface
can only be displayed in one language.