Please refer to PI Interface for Emerson Ovation User Guide for what are needed in detail.
You may download the user guide from:
Not only PI Interface for Emerson Ovation, you will need to configure below for all interfaces:
1. interface configuration (you can do this by using PI ICU)
2. create the interface service (this can be done by PI ICU as well)
3. PI tag creation so that data can be stored in PI Data Archive
4. PI Mappings or PI Trusts between PI Data Archive and the interface computer
And also make sure the interface computer can connect to data source.