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BACnet Schedule Display Object


Display microblock

The BACnet Schedule Display Object microblock defines a standardized object used to describe a periodic schedule that may recur during a range of dates, with optional exceptions on arbitrary dates. The Schedule object also serves as a binding between these scheduled times and the writing of specified values to specific properties of specific objects at those times.

Schedules are divided into two types of days: normal days within a week and exception days. It is assumed that the scheduler will exhibit restorative behavior in the event that the BACnet Device containing the schedule is restarted or the time is changed in the BACnet Device. The model for restoration assumes that each day's schedule is circular in nature. Thus, if the BACnet Device is restarted after midnight but prior to the first time in the list of BACnetTimeValues for that day, then the last value on the list for that day is used as the restoration value.

The link to this device is established in SiteBuilder, and the Object Instance setting in the display input allows the user to link to a specific object within that device. The input is most often used to display information from other vendor's equipment on WebCTRL Graphics and Properties pages, creating a display of that equipment. The operator can then read and write to the equipment as appropriate.

The BACnet Schedule Display Object microblock can be used to import multiple properties from a single object, however, to prevent unnecessary network traffic you should only import properties which are actually needed for the intended task. Use the buttons in the Present column to select which properties to get.

Properties

NOTE  Alt+click any value in WebCTRL to view property details, including its expression and editing privilege.