The advanced converter workflow component, Change payload encoding can be used for converting the payload of the workflow into another encoding.
This can e.g. be used, if an input XML is sent to InterFormNG2 with a header, that claims that the XML file is in a different encoding, than it really is.
So with this component you can convert the payload to another encoding to fit the claimed encoding.
The workflow component has these parameters:
Input encoding
The encoding of the input payload.
Output encoding
The encoding, that the payload is to be converted into.
The valid values for both Input and Output encoding are found in column 2 here:
https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html