Deepak,
Import parameters are asked once you click on Execute button of the FM. Here the screen is here.
Most of the fields look like Boolean values with 'X', if yes. Also there are 3 table icons seen. Once you click you are into the screen where you can fill the table values also. After inputting these values when you click on the Execute button in this screen the Entries in The Tables (output) will be filled. This your output.
I did not work on this. But all new FMs I try this way only. Often we need to play with FMs through Execute button and passing the Import parameters. After several trials we start understanding, what it is asking and what is returned.
KJogeswaraRao