If you want your points to use different limits at different times, you need to associate the points with Limit Profiles. These are time profiles that are configured to specify different limits at different times, for example, different limits for each day of the week.
The Limit Profiles settings for WITS points are shown on the Analog Point and Counter Point tabs of the Point Form (see Profiles for WITS Database Points).
For details on configuring Time Profiles, see Configuring Time Profiles.