Emerson Epsilon EP Drive 400518-01 Manual de instalación descargar pdf (Pagina 77)

Setting Up Parameters

Figure 60: Queue Object and Components Diagram

A detailed explanation of each of the queue components is as follows:

Queue Data

The queue data is loaded into the queue by statements in the user program. Two types of data are most often used with the

queue: Position Feedback, and Master Position Feedback.

Queue Size

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

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

Queue Offset

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

the Queue Exit event activates. For instance, if the source in selected source 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 source will activate when the Feedback Position is

greater than or equal to 5 + 10 or 15.

Full Level

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.

Source

The Source determines which parameter the sum of the Queue Data and Queue Offset are compared to in order to activate

the Queue Exit function. If set to FeedBackPosn (Position Feedback), the sum of the data and offset are compared to the

Position Feedback parameter. If set to MasterPosn (Master Position), then the sum is compared to the Master Feedback

Position parameter, and if set to CommandPosn (Command Position), then the sum is compared to the Motor Commanded

Position.

Name

You can assign a descriptive name to each queue, making the setup easier to follow. The length of the text string is limited

by the column width with a maximum of 12 characters. Simply double click on the Name field of any queue’s line to assign

a name to it.

Number of Queue Units

This selects the number of Queues available. Maximum of eight.

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.

Data[ ]

Size

Offset

Full Level

Comparitor Select

Name

Queue Object

Clear

Compare

Enable

Exit

Empty

Full

Overflow

Data In

ueue Data = X

Data Out

Y =

ueue Data

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 239 240

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Emerson Epsilon EP Drive 400518-01 Manual de instalación Pagina 77

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