Creating a BACnet Schedule

Scenario: You need to create a weekly occupancy schedule in a field panel that controls when the lights turn on and off for a school building.
You also want to create a holiday calendar that is used as an exception to the schedule, so that the lights will stay off during the holiday break, when the building will be vacant.

 

Reference: For background information, see BACnet Schedules.

 

Workflow diagram:

 

 

Prerequisites:

  • System Browser is in Application View.

 

Steps:

1 – Create Schedule Entries
  • You have created a BACnet schedule containing a data point that you want the weekly occupancy schedule to control.
    It is available in Schedules > BACnet Schedules in the System Browser.
  1. Select Applications > Schedules > BACnet Schedules > [BACnet schedule].
  1. Select the Schedule Entries tab and click New to add a new entry.
  1. Specify the time from when you want to start executing the schedule, for example, 6:00:00 AM, and select the Default check box.
    NOTE: Leaving an entry set to Default means the schedule will command all objects to the Schedule Default.
  1. Click New to add a second entry.
  1. Specify the end time to stop the schedule execution, for example, 6:00:00 PM, and change the Default check box to OFF.
  1. Click Save .
  • The system saves the schedule settings.

 

2 – Create a Holiday Calendar and Add Entries
  1. From the Scheduler toolbar, click New .
  1. Click New BACnet Calendar.
  1. In the Calendar Entries section, click New.
  1. In the Calendar Time Period section, select the Date range option and specify the start and end dates for the calendar in the Start date and End Date fields.
  1. Enter a name and the field device on which you want to save the calendar and click Save .
  • The system adds the calendar to the BACnet Calendars node in the Application view.

 

3 – Create an Exception
  1. In System Browser, select Applications > Schedules > BACnet Schedules > [BACnet schedule].
  1. Navigate to the Day/Week view, right-click the BACnet schedule and select Add Exception.
  1. In the Exception Period section, select Calendar.
  1. From the Calendar drop-down list, select the HolidayBreak calendar.
  1. In the Exception Times section, delete one of the two entries.
  1. In the remaining entry, enter 6:00:00 AM.
  1. Clear the None check box.
    NOTE: Creating an entry with the default check box checked returns control to the weekly schedule.
    For example, you might want to override the schedule for one hour at 1 P.M., so you create an entry at 1 P.M. with the override value.
    Then, you create an entry at 2 P.M. with None checked. Control will return to the weekly schedule at 2 P.M.
  1. Select OFF from the drop-down list.
  • The system creates an exception.