User Manual

Calendars and schedulers
Schedule
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● Switch value exception schedule:
If an active switch value exists for a specific time, the exception schedule
determines the resulting Present_Value.
● Daily profile switch value:
If an active switch value from a daily profile exists for a specific time, the
daily profile determines the resulting Present_Value.
● Default value switch value:
If no active switch value from the exception schedule and the daily profile
exists at a specific time of day, the default value determines the resulting
Present_Value.
Exception schedule [EcptSchd]
The exception schedule [EcptSchd] overwrites some or all of the daily
switching operations in a weekly schedule [WeekSchd]. It consists of one or
more profiles (max. 20).
Each profile has a:
● Date
● Specified time
● Priority
● Value for the output signal
The exception schedule may be a time range, including multiple days.
Depending on the customer's requirement, the date on which an exception
profile is to be activated can be defined either in the time schedule itself, or in
the standard BACnet object Calendar. In the latter case, the calendar object is
linked to the time schedule via BACnet references.
An exception begins with the first time entry and ends with the last. Each
profile may contain up to 20 switch times.
The switch value of all current profiles is continuously monitored for present
priorities. The priorities determine which switch value is transferred to the
[PrVal] output. The system evaluates every minute if a day or an exception
profile should be active. Each profile of the exception schedule is assigned a
priority level from 1 (highest) to 16 (lowest). If several exceptions are valid at
the same time, the profile with the highest priority is processed.
If multiple switch values from different exceptions with the same priority exist
at a specific time, the active switch value of the exception with the lowest array
index (from the exception schedule) determines the exception switch value.
The procedure is the same as the procedure for various priorities. The array
index is used as a sub-priority. Exceptions with different priority levels however,
are independent of each other. That's why it is preferable to assign different
priorities to exceptions defined in the schedule.
Exception profiles
Activating exception
profiles
Setting priorities