User Manual

Calendars and schedulers
Calendar
10
174 | 351 CM110664en_07
Processing order
At start-up, when delta loading and when adjusting the date and time, the order of processing is a key
factor in ensuring that from the first processing cycle on, the correct output values of a schedule function
block are determined and transmitted to the output. The temporary transmission of incorrect switch values
can be avoided in this way. The order of processing of the individual function blocks is determined in the
CFC Editor (manual/automatic).
The order of processing is:
1. Calendar function blocks
2. Schedule function blocks
3. Any other function blocks, which could be switched by a schedule function block
10.2 Calendar
Function block Calendar
The calendar object is a function block from the firmware library. It contains a list of dates [DateList] with,
e.g., a date or a date range.
The date list [DateList] uses Boolean logic to control the calendar outputs. [PrVal] activates an exception
profile if the calendar object is referenced by a schedule object. The outputs tomorrow [Tmw] and day after
tomorrow [DayAfTmw] support the optimum start/stop control of the plant.
Standard BACnet object Calendar
The SCHED (schedule) and CAL (calender) function blocks in the firmware library correspond to the
SCHED and CAL standard BACnet objects. Standard BACnet object can be operated via the BACnet clients.
The calendar and schedule can be linked at the BACnet level by references. There is no data flow link
between the calendar and schedule function blocks in the CFC chart.
10.3 Wildcards
A wildcard character (*) generates a repetition and is an abbreviated way of listing individual entries, e.g.,
writing 3.* is a short way of representing 3.1., 3.2., 3.3., 3.4., 3.5., etc.
All data structures of the scheduler or calendar objects support dates with wildcards. Date ranges and time
specifications do not support wildcards. Invalid weekdays are ignored.
Date entries with wildcards
Date Meaning
23.April.2001 /Monday 23.April.2001, Monday
23.April.2001 /Tuesday Never, since 23.April 2001 is a Monday
23.April.2001 /* 23.April.2001
23.April.* /Monday Each April 23rd, each year if the weekday is a Monday
*.April.2001 /* Every day in April 2001
*.April.* /Tuesday Each day in April of each year if the weekday is a Tuesday
31.*.* /* Each January 31, March 31, May 31, … of each year
or each February 28/ 29, April 30,... of each year