Rockwell-automation Logix5000 Controllers Sequential Function Charts P Manuel d'utilisateur télécharger pdf (Page 21)

Design a sequential function chart Chapter 1

To Use this structure With these considerations

Loop back to a previous step Wire to a previous step on page 24

• Connect the wire to the step or simultaneous branch to

which you want to go.

• Do not wire into, out of, or between a simultaneous

branch.

Here are some examples of SFC structures for different situations.

Example situation Example solution

Station 45 and 46 of an assembly line work on parts simultaneously. When both

stations are done, the parts move down 1 station.

Simultaneous Branch

Depending on the build code, a station either drills or polishes. Selection Branch

To simplify my programming, I want to separate communications and block transfers

from other control logic. All occur at the same time.

Simultaneous Branch

In a heat treating area, the temperature ramps up at a specific rate, maintains that

temperature for a specific duration, and then cools at a specific rate.

Sequence

Rock well Automati on Publication 1756-PM006F-EN-P - Oct ober 2014 21

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 87 88

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Rockwell-automation Logix5000 Controllers Sequential Function Charts P Manuel d'utilisateur Page 21