Step by step interface for IDOC ORDERS05 to EDI 850 using B2B add-on and getting Functional acknowledgement 997 back

Hi All,

I have to build  an interface using EDI 850 Outbound (B2B add-on)

The requirement is as follows :

SAP creates Purchase Order (PO) output using ORDERS05/ORDERS (ORDERS) IDoc’s as well as PI to translate those ORDERS’s IDoc’s into Electronic Data Interchange  (EDI) 850 messages and transmit those to an EDI Value Added Network (VAN).In addition suppliers provide “confirm receipt of the EDI 850 messages” by sending Functional Acknowledgments (EDI 997 messages).

Please guide me in building the interface: IDoc to EDI 850 and getting back the Functional acknowledgement 997.

Please explain me the flow and adapt backters to be used in the process.

How is it

IDOC sender to AS2   or IDOC sender to EDI separator and then AS2 ?

I am not clear about the interface for getting 997 acknowledgement. Are these two different interfaces from PI perspective?

Thanks for your help,

Pooja