Rockwell Automation Logix5000 Controllers Sequential Function Charts Programming Manual - Manual (Page 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