Recently learnt how to prevent session logout.
Navigation Path:
System Administration->Profile->System
Query on Username and the Profile "ICX:Session Timeout"
ICX:Session Timeout
Use this profile option to enforce an inactivity time–out. If a user
performs no Oracle Applications operation for a time period longer than
the time–out value (specified in minutes), the user’s session is disabled.
If this profile option to 0 or NULL, then user sessions will never time out
due to inactivity
