Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Manuel d'utilisateur télécharger pdf (Page 61)

Manage event tasks Chapter 2

Example – producer controller and consumer controller

As parts move along a production line, each station requires production

specifications for the part at its station. To make sure that a station doesn’t act on

old data, an event task signals the arrival of new data for the next part.

Producer controller

This controller controls station 24 and produces data for the next station (station

25). To signal the transmission of new data, the controller uses the following

elements:

• Produced_Tag

• Ladder logic

Produced tag properties

Produced_Tag is configured to update its event trigger through an IOT

instruction.

Ladder Logic

If New_Data = on, then this occurs for one scan.

Rockwell Automation Publication 1756-PM005-EN-P - October 2014 61

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 72 73

Pas de commentaire

Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Manuel d'utilisateur Page 61