MRP Parameters for material master

Hi,

I am supposed to use FM 'MD_MRP_LEVEL_CHANGE_DATA'

to update MRP ARea dependetnt data of material master records.

Input file has two MRP controllers specified :

1) MRP Controller (Material master for plant 'MRP1 view'

2.) MRP Controller (Material master for MRP area 'MRP1 view'

but above mentioned FM contains only one MRP controller...which one is to be passed there ,,,,,and how and where to pass the another