Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Bedienungsanleitung PDF herunterladen (Seite 57)

Manage event tasks Chapter 2

Description

In Controller A, logic updates the values of a produced tag.

Once the update is complete, the Controller A runs an IOT instruction to send the data and an event trigger

to Controller B.

Controller B consumes the new data.

After Controller B updates the consumed tag, it runs the event task.

The type of network between the controllers determines when the consuming

controller receives the new data and event trigger through the IOT instruction.

The following table lists the times when the consuming device receives the new

data and event trigger.

With this controller Over this network

The consuming device receives the data and event

trigger

ControlLogix Backplane Immediately

EtherNet/IP network Immediately

ControlNet network Within the actual packet interval (API) of the consumed

tag (connection)

SoftLogix5800 You can produce and consume tags only over a ControlNet

network

Within the actual packet interval (API) of the consumed

tag (connection)

The following diagrams compare the receipt of data via an IOT instruction over

EtherNet/IP and ControlNet networks.

EtherNet/IP Network (ControlLogix controller) ControlNet Network

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Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Bedienungsanleitung Seite 57