Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 199 of 265
26.5.2 Special Holiday Periods
The Holiday Clock facility allows the period between two dates to be considered as
a Special Holiday period. Currently, up to 32 special holiday periods can be
configured in advance.
Example: The controller can be configured with a special holiday period that starts
on 29-MAR-99 and finishes after 09-APR-99 in order to define the Easter school
holiday period as March 29
th
to April 9
th
1999.
Timetable events that use the normal day code numbers (i.e. those in the range 0 to
15) will not run on the days during these special holiday periods. Thus taking the
original example from section 26.5.1, the CLF plans would not be introduced and the
controller would remain isolated.
However, if different CLF plans were required to start at different times during these
holiday periods, new timetable events can be added to action these requirements
during the special holiday period. The timetable event should be entered as normal
other than adding 100 to the required day code number (see section 26.1). For
example, use the day code 109 for every weekday during the holiday period.
If certain timetable events are to run regardless of these special holiday periods,
rather than defining two entries, one for outside the holiday period and one for within
the holiday, one entry can be defined. In this case, add 200 to the required day code
number (see section 26.1). For example, use the day code 209 for every weekday
regardless of the holiday periods.
To summarise, day codes in each of the following ranges are actioned as follows:
0 to 15 100 to 115 200 to 215
Ignored Actioned Actioned During a Holiday Period
Actioned Ignored Actioned Outside all Holiday Periods