User Manual

Calendars and schedulers
Schedule
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10.1 Schedule
Weekly schedule [WeekSchd]
The weekly schedule [WeekSchd] consists of seven 24-hour profiles, one for
each day of the week. By default, the priority level assigned to the weekly
schedule is 16 (the lowest priority). The weekly schedule is active unless there
is an exception schedule.
For system limits, see chapter
System Configuration .
A 24-hour profile is a list of time-and-value pairs. The present value remains at
the [PrVal] output until the processing of the next time-and-value pair causes a
new value to be written to the output.
If there is no schedule entry with a switch time of 00:00 in the daily profile, the
default value determines the resulting Present_Value (=Rule schedule default
value).
If the daily profile encompasses an empty list of schedule entries, the default
value [DefVal] determines the resulting Present_Value (=Rule schedule default
value).
The evaluation of the exception schedule, weekly schedule, and [DefVal] is as
follows:
Start of the day:
● Exception schedule with switch value at 00:00:
The exception schedule determines the resulting Present_Value if an active
switch value exists at 00:00. The day begins with this exception value
(=Rule switch value exception schedule).
● Empty daily profile:
If the daily profile encompasses an empty list, the default value [DefVal]
determines the resulting Present_Value (=Rule schedule default value).
● Daily profile with switch value at 0:00.
If a schedule entry with switch time 00:00 and active switch value is
available in the daily profile, the switch value determines the resulting
Present_Value. The day begins with the daily profile value (=Rule Switch
value daily profile).
Course of the day:
24-hour profiles