The F60CHR defaults are changed using the Work with Partition Multilingual Attributes. Choose the language and the second page allows the IBM i EBCDIC CCSID to be entered. It is critical that this truly reflects how you use languages on your system.
For example, if English and French are both run in CCSID 037 (English US), then the French default CCSID needs to be set to 037. If this is not done, 297 will be used. If 297 is used, the French data will be incorrect on Windows.