Choose a last scan option – Rockwell Automation Logix5000 Controllers Sequential Function Charts Programming Manual User Manual
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Chapter 1 Design a sequential function chart
Programmatic reset
Automatic reset
Use logic to clear data
Let the controller automatically clear data
Each option requires you to make these decisions.
• Choose a last scan option.
• Based on the last scan option, develop your logic so that the last scan returns
data to the correct values.
Choose a last scan option
On the last scan of each step, you have these options. The option that you choose
applies to all the steps in all the SFCs in this controller.
If you want to
And on the last scan of a step
Then see
Control which data to clear
Execute only P and P0 actions and use them to clear the
required data.
Execute all actions and use either of these options to clear the
required data.
• Status bits of the step or action to condition logic
• P and P0 actions
Use the programmatic reset option
Let the controller clear data
--------------------------------------------->
Use the automatic reset option
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Rockwell Automation Publication 1756-PM006F-EN-P - October 2014