How to get process order number as variable in PI Sheet

Hi,

In PI Sheet, Process order number is capturing automatically. I need to pass this process order number to function module as variable to get the release date for that process order.

That process order is not a requested value. How to define as Variable and Process order number need to pass to that variable.

PPPI_VARIABLE PO

PPPI_REQUESTED_VALUE PPPI_PROCESS_ORDER

If i give like that, in my PI sheet one column is showing extra with process order number. How to define the variable.

Please help me.

Naren