Emerson Epsilon EP Drive 400518-01 Manual de instalación descargar pdf (Pagina 165)

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Parameter Descriptions

Size

Queue Size

This is the maximum number of elements that can be stored in the queue. If more than this number of pieces of data is in the

queue at a time, then a Queue Overflow event will activate.

Full Level

Queue.#.FullLevel

The amount of data in the queue is constantly monitored and the Queue Full source will activate when the number of pieces

of data in the queue exceeds the Full Level parameter. This is only a flag and does not indicate a fault of any kind.

Queue Clear

Queue.#.QueueClear

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

Queue.#.QueueCompareEnable

The Compare Enable is what causes the comparator 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 equal to the Comparator Select parameter.

Data In

Queue.#.DataIn

Data is loaded into the queue using the Queue.#.DataIn instruction in a program. When DataIn is set equal to value, that value

is entered into the queue and the queue offset is added to it. If Queue Overflow is active, then no more data can be put into

the Queue.

Queue Empty

Queue.#.QueueEmpty

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 Exit

Queue.#.QueueExit

This source activates when the Comparator Select parameter is equal to the sum of the data entered into the queue, plus the

queue offset. Queue Exit deactivates when the Queue Remove instruction is processed.

Queue Full

Queue.#.QueueFull

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.

Offset

Queue.#.QueueOffset

The Queue Offset is the value that is added to the Queue Data and then compared to the Comparator to determine when the

Queue Exit event activates. For instance, if Comparator Select is set to Feedback Position, and the Queue Offset is set to 10,

and the user puts the value 5 into the queue, the queue exit function will activate when the Feedback Position is equal to 5 +

10 or 15.

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Emerson Epsilon EP Drive 400518-01 Manual de instalación Pagina 165