User Manual

Calendars and schedulers
Alarm messages
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If a date contains a wildcard in the month or year, the last day of the month is used for the day, if the value
of the day is greater than the maximum number of days in the month.
Week and day with wildcards
The following table shows an example of entering a week and day (WeekNDay) using wildcards. During the
evaluation, a wildcard is replaced by the corresponding value of the current date. If the WeekNDay
generated in this way is equivalent to the current date, this is an exception day.
Day of the week Meaning
January/2/Monday Monday in the second week of January
*/1/Tuesday Every first Tuesday of a month
February/*/Wednesday Every Wednesday in February
10.4 Alarm messages
The scheduler object cannot directly generate alarms when, e.g., a commanded object cannot be found.
The alarm function (extended, basic or simple) which defines the alarm behavior of the object in the
system, and the alarm class do not exist because of standard compliance.
The fault alarming of the schedule object must therefore be implemented as an additional binary value
function block. That's why the function block is linked with the Dstb (Disturbed) pin of the scheduler and
parameterized accordingly. The additional binary value function block is optional and only required, when a
fault alarming of the scheduler is wanted, e.g., for scheduling external objects.