Thank you for your reply!
I think Pickle should work just fine for our application.
The logi.cal solution is much appreciated as well.

Hello Mr. and Mrs. We are now evaluating a potential Revolution Pi application project. The customer requires some configuration(variables) that its value can be kept after rebooting the system. Similar to the Persistent variable which can be declared in CODESYS. However, we are not sure how to appr...