Exporting PLC code in PLCopen format

ITcPlcOpenImportExport2.PlcOpenExport2 allows you to export individual POUs or entire subtrees of a PLC project as PLCopen XML. The ITcPlcOpenImportExport2 interface is obtained by casting the PLC project Tree Item. The elements to be exported are addressed using a project-specific selector. The bSubTree parameter controls whether only the specified elements are exported, or whether all child elements are also exported.

Requirements

TwinCAT XAE is installed and started.
A DTE connection to the target instance is active.
ITcSysManager is initialized in an STA thread.
A PLC project is included in the solution.
The ITcPlcOpenImportExport2 interface is available starting with TwinCAT Build 4019.

C# sample

The selector is project-specific and uses ; as a separator, such as "POUs.fb1;POUs.fb2". Using bSubTree = true exports all sub-elements of the selected element, including methods, actions, transitions, and properties. Without this flag, only the explicitly listed elements are exported.

ITcSmTreeItem plcProject = sysManager.LookupTreeItem(@"TIPC^PLC1^PLC1 Project");
ITcPlcOpenImportExport2 exportInterface = (ITcPlcOpenImportExport2)plcProject;

// Export a single POU
exportInterface.PlcOpenExport2(
    @"C:\Export\MyProg.xml",   // output file
    "POUs.MyProg",             // selection (project-relative, ';' as separator)
    false                       // false = only listed elements, not recursive
);

// Export selected POUs
exportInterface.PlcOpenExport2(
    @"C:\Export\MyProg.xml",   // output file
    "POUs.MyProg;DUTs.MyDUT",  // selection (project-relative, ';' as separator)
    false                       // false = only listed elements, not recursive
);

// Export entire POUs folder recursively
exportInterface.PlcOpenExport2(
    @"C:\Export\AllPOUs.xml",
    "POUs",
    true    // true = entire subtree including methods, actions, transitions, properties
);

PowerShell sample

The PowerShell sample calls PlcOpenExport2 with the same three parameters as the C# sample.

$plcProject = $sysManager.LookupTreeItem(@"TIPC^PLC1^PLC1 Project");

# Export a single POU
$plcProject.PlcOpenExport2(
    'C:\Export\MyProg.xml', # output file
    'POUs.MyProg', # selection (project-relative,';' as separator)
    $false   # false = only listed elements, not recursive
);

# Export selected POUs
$plcProject.PlcOpenExport2(
    'C:\Export\MyProg.xml',# output file
    'POUs.MyProg;DUTs.MyDUT',# selection (project-relative,';' as separator)
    $false # false = only listed elements, not recursive
);

# Export entire POUs folder recursively
$plcProject.PlcOpenExport2(
    'C:\Export\AllPOUs.xml',
    'POUs',
    $true # true = entire subtree including methods, actions, transitions, properties
);