Siemens SIMATIC S7-1500 Function Manual page 258

Note
Renaming nod names (DisplayNames)
In read lists, write lists and method lists you can rename the name of a node by means of the
shortcut menu. This is the "DisplayName" in the OPC UA language usage.
If you rename the name of a method list node and the node is already used in a programmed
block for the method call "OPC_UA_MethodCall", the compilation of the project leads to
consistency errors: During the compilation the UDTs of the method are generated with the
changed name. The references to the method used in the program are then no longer
correct.
To correct the consistency errors, you can either undo the name change of the method in the
client interface or navigate to the method call and assign the relevant parameters again there
under "Properties > Block parameters" ("Configuration" tab).
Communication
Function Manual, 11/2019, A5E03735815-AH
9.4 Using the S7-1500 CPU as an OPC UA client
OPC UA communication
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