WCHAR 
It describes that the type is used as double-byte character.
The representation of the WCHAR DataType in the address space is shown in the following table:
| Name | Attribute |
|---|---|
| NodeId | ns=1;i=3012 |
| NamespaceUri | http://PLCopen.org/OpcUa/IEC61131-3/ |
| BrowseName | WCHAR |
| IsAbstract | False |
| SubtypeOf | UInt16 |
| Categories |