Before data is stored, it can be checked by the system automatically. This ensures that only wished data is stored and that the user has to make certain minimum entries. The check can be adjusted by the system supervisor (without having to be able to program) according to your requirements.
The check does not take place before a storage function has been called up (e.g. the "Save" button was clicked). Normally, all checks are carried out and all errors are displayed. The fields containing errors are marked with a red background.
If a program consists out of more Separate Pages, the error can be on each single one of them. The description of the error may give a hint to the tab which the error is located on.