Rockwell-automation Logix5000 Controllers Sequential Function Charts P Bedienungsanleitung PDF herunterladen (Seite 14)

Chapter 1 Design a sequential function chart

A stop lets you stop and wait for a command to restart.

A wire connects one element to another element anywhere on the chart. This wire takes you to the

conveyor step on the first part of this SFC (previous figure).

Follow these steps to design a sequential function chart.

1. Define the tasks on page 14

2. Choose how to execute the SFC on page 15

3. Define the steps of the process on page 16

4. Organize the steps on page 20

5. Add actions for each step on page 25

6. Describe each action in pseudocode on page 28

7. Choose a qualifier for an action on page 29

8. Define the transition conditions on page 30

9. Transition after a specified time on page 33

10. Turn off a device at the end of a step on page 35

11. Keep something on from step-to-step on page 42

12. End the SFC on page 45

13. Nest an SFC on page 48

14. Configure when to return to the OS/JSR on page 49

15. Pause or reset an SFC on page 50

16. Execution diagrams on page 50

The first step in the development of an SFC is to separate the configuration and

regulation of devices from the commands to those devices. Logix5000 controllers

let you divide your project into one continuous task and multiple periodic tasks

and event tasks.

Define the tasks

14 Rockwell Automation Publication 1756-PM006F-EN-P - October 2014

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