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Id

Read TwinCAT TIA
Local File and directory access XML reader ActiveXMLDocuments A reader

ns=2;s=DEPRAG Smart/Local/FileAndDirectoryAccess/Xml/ActiveXmlDocuments/0/Id

Unique index.

Examples:

In addition to the parameters already explained, the following variables must be created / transferred for the implementation in TwinCAT 3:

Beckhoff parameter:

    bXmlReadId
    A boolean variable that can be used to trigger the execution of the ReadId command.
    OutputXmlReadId
    A DINT variable into which the return value of the ReadId method is written.
    hrXmlReadId
    This can be used to monitor the execution of the command. Error codes have the type "HRESULT".
    fbXml
    An instance of the "FB_Xml" function block supplied with the DEPRAG Smart library.
    ClientId
    A STRING(255) variable that uniquely identifies the XML document in the ActiveXmlDocuments list.
    ConnectionHandle
    "ConnectionHandle" received when establishing a connection between DEPRAG Smart Server and your OPC UA client. 


VAR
       bXmlReadId      : BOOL;
       OutputXmlReadId     : DINT;
       hrXmlReadId      : HRESULT;

       fbXml        : FB_Xml;
END_VAR

hrXmlReadId := fbXml.ReadId(
       bExecute    := bXmlReadId,
       ConnectionHandle  := depragSmartConnection.ConnectionHandle,
       ClientId   := '0',
       Output    => OutputXmlReadId);
IF hrXmlReadId <> S_FALSE THEN 
       bXmlReadId := FALSE;
END_IF

For examples and explanations regarding the calls of nodes via Siemens TIA Portal please refer to the sub-menu "Siemens TIA Portal" in section "Getting Started".