[Bug]: DataType WORD, DWORD and WSTRING not supported in OPC-UA.

[codekundan]

What happened?

Hi Plc4x Team and @splatch . I was testing Plc4x with Mitsubishi PLC. I was not able to read and write WORD, DWORD and WSTRING datatype. It gave me "Datatype WORD is unsupported by this protocol" error as can be seen in pic below:-

I want to ask whether OPC-UA especially Plc4j supports these 3 Datatypes (WORD, DWORD, WSTRING)? I was able to read and write with other Datatypes such as INT, REAL, BOOL, STRING. Any help regrading this ?

Version

v0.12.0

Programming Languages

• plc4j
• plc4go
• plc4c
• plc4net

Protocols

• AB-Ethernet
• ADS /AMS
• BACnet/IP
• CANopen
• DeltaV
• DF1
• EtherNet/IP
• Firmata
• KNXnet/IP
• Modbus
• OPC-UA
• S7

[splatch]

Hello @codekundan, I think this type is not recognized at the protocol level, but defined on client side. Which type from specification are you actually trying to read: https://reference.opcfoundation.org/Core/Part6/v104/docs/5.1.2?

[codekundan]

Hello @splatch , I am trying to test the available Datatypes in the PLC4X OPC-UA website https://plc4x.apache.org/plc4x/0.13.0-SNAPSHOT/users/protocols/opcua.html#:~:text=UINT%20(uint%2016)-,WORD%20(uint%2016),-DINT%20(int%2032

If you look at the link, Datatypes like WORD, DWORD and WSTRING are mentioned. So I thought they should be supported. Though I can make use of UINT( uint16 ), UDINT( uint32 ) instead of WORD ( uint16) and DWORD ( uint32 ) respectively. Only Datatype left will be WSTRNG (utf-16).

[codekundan]

Hello @splatch , I am closing this issue. If you want to add something please feel free to open it.