LLBLGEN 3.1 Rel 31st March .NET Framework 2.0 Windows Application Oracle 9i/10g MS ORACLE

1. I have created sequences in DB
2. In designer I have selected desired sequence for each entity
3. During entitysave action, PK is generated automatically and inserted in DB

Everything fine till here.

In same scenario, is there any setting to disable auto PK insert and specify manual PK value during entity save action ?

If you assigned a sequence to the pk, then no. So the alternative for you is to remove the sequence from the pk field mapping, then regenerate, that makes it an entity you should set the PK field manually.