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ua.filestream.TuaStream.uaFileRead
Methods TuaStream Class ua.filestream Namespace

uaFileRead is used to read data from an OPC UA server

procedure uaFileRead(Length: uaInt32; var Data: uaByteString);
__fastcall uaFileRead(uaInt32 Length, uaByteString Data);

It calls the OPC UA Read method. 

You can find the description at: https://reference.opcfoundation.org/Core/Part20/v105/docs/4.2.4

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