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Detail Programming Time Zones
This section applies only if your unit supports time zone functions. While Trigon has
produced many products that have incorporated simple time zone functions, this product
represents a full embracement of Time Zone Fuctionality.
Basically, Time Zones define a period of time that declares a Window of opportunity. A
time zone has a specific start time and ending time. This time however may also include
calender timing as well as clock timing. For example: From Monday to Friday or January to
November.
This unit supports 99 time zones of which two are dedicated to Daylight Savings Time.
These are zones 98 and 99, for DST of spring and fall respectively.
The various zones are broken down into 3 groups as follows:
Zones 1 to 24 are not zones but rather a list of other time zones for mixing purposes.
Zones 25 to 49 are true time zones that define an Allow Window.
Zones 50 to 97 are true time zones that define a Deny Window.
The concept of Window means that when you open the window, air (or people) passes through
until you close the window.
Their are nine "9" elements to each time zone, each element is composed of two "2" digits.
The nine "9" elements of a single time zone are:
1 2 3 4 5 6 7 8 9......9
From Month:Date:Hour:Minute, To Month:Date:Hour:Minute, For Day to Day.
Example: From 01/01/00/00, To 12/31/23/59, For 1-7
In this example, the time zone covers the Start of Jan/1st to End of Dec/31st, Monday to
Sunday. Or in other words, the full year with no gaps. A person assigned this time zone
could enter and exit anytime they wish because this window would always be open.
Day to Day is defined as 1-7 means 1 to 7 with 1 being Monday and 7 being Sunday.
A simple change from 1-7 to 1-5 means full daily access except on Saturday and Sunday.
If you leave 17 as 17 and only change the From-Time and the To-Time, then you could define
a Clock window such as 07:00 to 15:30 as defining a window from 7:00 AM to 3:30 PM for
typical working hours. Now change the 1-7 to a 1-5 and we have a typical work week as:
01/01-07:00 to 12/31-15:30 for 1-5.
Notice in this window the date doesn't matter. It's good all year and permits entry as:
From 7:00 AM, To 3:30 PM only, Mondays to Fridays only, all year.
So if Allow Windows are this simple then why include the Date Functions? Glad you asked.
This brings us to the Deny Windows. When one of these windows is active, they Deny Entry.
They are mostly used for Holidays. For example imagine a Deny Window as Follows:
From 12/25-00:00 to 12/25-23:59 1-7. Did you recognize the date as Dec-25? Given the clock
part of this zone we can see that the deny window covers the whole day of Christmas. The
Day to Day is 1-7 so it becomes a don't care what day of the week this date falls on.
So, hopefully, you have a concept now of what Allow-Windows and Deny-Windows can do. So to
wrap this description up, we now come to the lists defined as zones 01 to 24.
For a work place, we may wish to define a specific worker and a zone to apply to him.
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