Hello Raghuraman,
Muni has mentioned exact links. While calling NWBPM from PI, just maintain a SOAP receiver channel with following details:
Create a communication channel with the following attributes:
- Direction: Receiver
- Adapter type: SOAP
- Message protocol: XI 3.0
- Addressing type: URL Address
- Target URL: http(s)://<hostname>:<port>/MessagingSystem/receive/JPR/XIEnter the host name and port of the local system.
And that should be it. Read the above links more carefully for more details Configuring Message Processing from PI to BPM - Process Orchestration - SAP Library
Regards,
Ankit