Universal Devices ISY-994i Series, User Manual

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The To field can be changed to For, defining the duration of the event based on time the
start time. If you assigned a timer event to start at a time in a specific day of the week, and
the For duration puts the end time to the next day, the ISY will complete the event timer on
the next day. The timer event will always start at the set time of the selected weekday. For
example, the start time (From) was set at 1:00PM on Monday and would last For 23Hrs. In
this example the event will end on Tuesday at 12:00 noon. It will always start on Monday
and end on Tuesday. This is a valid setting.
Figure 131: Schedule Time Is condition fields
Figure 132: Schedule From/To condition fields
Longer daylight and shorter night time in summer. Shorter daylight and longer night time
in winter. The change in sunrise and sunset time throughout the year from winter to
summer meant that a fixed predetermined turn on or off time of lights meant you may
either be turning on or off the lights too early or too late. Timer event based on Sunrise or
Sunset instead of a specific time should solve this. You have the option to advance or delay
the event to occur by setting the time and before/after fields.