Siemens SIMATIC PANEL PC 877 - Manual (Page 85)

Operation and configuration
9.2 Additional Drivers and Applications
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
9-17
Notice
If you use a different keyboard layout to "Englisch/USA international", the internal keyboard
codes will no longer be correct.
Start > Control Panel > Date, Time, Language, and Regional Options > Add other languages >
Languages tab,Language used in menus and dialogs field.
For the Date, Time, Language and Regional Options set the default as non-Unicode
programs under Advanced in addition to the language for menus and dialogs.