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Queue Sources and Destinations
Sources
Queue Exit
This source activates when the Comparitor Select parameter is greater to or equal to the sum of the data entered into the queue,
and the queue offset.
Queue Empty
This source is active if no data is stored in the queue. It will become inactive when the first piece of data is loaded into the
queue and remain inactive until all data has been removed from the queue.
Queue Full
The Queue Full source will activate if the number of pieces of data in the queue equals or exceeds the Full Level parameter.
The source will deactivate when the number of pieces of data in the queue is less than the Full Level.
Queue Overflow
This source activates when there is no more room in the queue to store data. The maximum number of pieces of data is
determined by the Queue Size parameter.
Destinations
Queue Clear
This destination automatically clears all of the data out of the queue. The cleared data is not saved and there is no way to
recover the cleared data. This is typically activated on power-up of the system to make sure no old data remains in the queue.
Queue Compare Enable
The Compare Enable causes the comparitor internal to the queue to function. If the Compare Enable is inactive, then the
Queue Exit source will never activate. If activated, then the Queue Exit source will activate when the Queue Data plus the
Queue Offset is greater than or equal to the Comparitor Select parameter.
To fully understand the operation of the queue, the following diagram has a more detailed view of the Queue object.
Setting Up Parameters
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