Rockwell-automation 5720 DriveLogix System Manual de usuario descargar pdf (Pagina 138)

Publication 20D-UM002C-EN-P - November 2003

6-22 Communicating with Devices on an EtherNet/IP Link

Consuming a tag

A consumed tag represents data that is produced (broadcast) by one controller

and received and stored by the consuming controller. To create a consumed

tag:

1. You must be programming offline.

2. In the controller organizer, double-click the Controller Tags folder and

then click the Edit Tags tab.

3. Select the tag that you want to consume, or enter a new tag, and display

the Tag Properties dialog box.

4. Specify:

All consumed tags are automatically controller-scope.

The produced tag in the originating DriveLogix controller must have the same

data type as the consumed tag in the consuming DriveLogix controller. The

DriveLogix controller performs type checking to make sure proper data is

being received.

In this field: Type or select:

Tag Type Select Consumed.

Controller Select the name of the other controller. You must have already created the controller in

the controller organizer for the controller name to be available.

Remote Tag Name

Remote Instance

Type a name for the tag in the other controller you want to consume.

Important: The name must match the name in the remote controller exactly, or the

connection faults.

RPI

(requested packet interval)

Type the amount of time in msec between updates of the data from the remote controller.

The local controller will receive data at least this fast.

Display Style If you are creating a consumed tag that refers to a tag whose data type is BOOL, SINT,

INT, DINT, or REAL, you can select a display style. This display style defines how the tag

value will be displayed in the data monitor and ladder editor. The display style does not

have to match the display style of the tag in the remote controller.

IMPORTANT

If a consumed-tag connection fails, none of the tags are

transferred from the producing controller to the

consuming controller.

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Rockwell-automation 5720 DriveLogix System Manual de usuario Pagina 138