Alcorn Mcbride AM-4, Hardware And Software Reference Manual

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Scheduler 35
Scheduler Rules
Precedence: If two events occupy the same slot, this is the precedence:
1. StartTime Bootups take ultimate precedence during the bootup minute, and are
treated as normal events afterwards ( if they repeat).
2. Repeating Bootups take second precedence during the bootup minute.
3. One-shots take precedence over Loops.
4. Finites take precedence over infinites during their period of execution.
5. Finites started on a later slot will take precedence over earlier finites.
6. Infinites started on a later slot will take precedence over earlier infinites.
7. If two or more events with the same profile are scheduled for the same start
slot, the first one found in the file will be executed. This should only occur as
a mistake . Ex. Two one-shots, finite loops, or infinite loops are programmed
with the same startslot.
When Double Occupancy is Legal: There are times that two events can legally
occupy the same slot. These are expected to occur as:
• Overlaps - When two or more loops (finites or infinites)
unintentionally line up. Ex. A 3hour infinite and a weekly infinite will eventually
overlap, if programmed on same timestamp of the day, but not necessarily the
same datestamp.
• One-shot Overrides - one-shots that are intended to supercede a
standard finite or infinite show. Ex. A special holiday show at the regular show's
slot.
• Finite Overrides - Finites that are intended to supercede another finite
or infinite show. Ex. 1week finite that is placed in the middle of a 6month finite
to override the standard show for 1week, then go back to normal.
• Infinite Overrides (Replacements) - Infinite loops scheduled for the
same datestamp at a later date. Ex. Daily infinite for three months, another daily
infinite for the rest of the year. Although this probably should be programmed
as finites, a customer may program it as replacements.