Rockwell-automation Logix5000 Controllers Function Block Diagram Progr Manuel d'utilisateur télécharger pdf (Page 24)

Chapter 1 Program a Function Block Diagram

Wire elements together

Wire (connect) two elements together by clicking the output pin of the first

element and clicking the input pin of the other element. A green dot shows a valid

connection point.

Item Description

Output pin of the first element

Input pin of the second element

Mark a wire with the Assume Data Available indicator

When there are a group of blocks in a loop, identify which block executes first.

The Assume Data Available indicator marks the input wire that creates the loop

(the feedback wire). It defines the data flow within the loop.

• To define a wire as an input wire, right-click the wire and click Assume

Data Available.

The arrow indicates that the data serves as input to the first block in the loop.

24 Rockwell Automation Publication 1756-PM009E-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers Function Block Diagram Progr Manuel d'utilisateur Page 24