Create User System Library
Right-click the FB and choose Export FB (Function Block → File)
Click Yes.
Choose the CPU type that supports this FB and then click OK.
If the same FB name already exists in System Library, below message will pop up.
Click Yes, if you want to replace it.
If you click No, FB will not be saved in User System Library.
If you click Yes, below message will appear.
Now, you can see FB005 is duplicated and saved in User System Library.
How to delete FB in System Library
FB in System Library is saved in CICON → SYSTEM_LIBRARY → FBLIB folder. In order to delete FB from System Library, delete the FB in FBLIB folder and restart CICON. If you do not restart CICON and try to use the deleted FB, below error message will appear.