Hi Tharun,
The Barcode Scanner widget allows you to fill in one attribute of an Object. If you need to register more than one attribute of your Object, you must implement multiple occurrences of the Barcode Scanned widget, each with the link to the attribute set in the "General - Scanned result" setting and use visibility conditions to give focus to the right widget.
For example when you need to scan 3 attributes you:
Go Make It