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OPC UA Client: Read Multidimensional Arrays

Vinoth Kumar S

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02/10/2017

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02/15/2017 - 23:16

Hi Everyone,

I am developing OPC UA Client application. I am implementing in C++. Can you guide me to how to form the read request for reading the 2 dimensional array and 3 dimensional array.

If possible please send the code snippet.

Regards,
Vinoth

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02/17/2017 - 00:37

The request is always the same whether you read a boolean, UInt32, a structure or a multi-dimensional array.

The value returned with the response is a Variant and – as the name already suggests – it will include different information depending on the returned value.

In the open source AnsiC stack on Github (https://github.com/OPCFoundati…..n/UA-AnsiC), for example a Variant for multi-dimensional arrays contains an “OpcUa_VariantMatrixValue”.