Rockwell Automation Logix5000 Controllers Sequential Function Charts Programming Manual - Manual (Page 43)

Design a sequential function chart Chapter 1
Example
A paint operation completes these actions.
1. Transfers the product into the paint shop.
2. Paints the product using 3 separate paint guns.
3. Cleans the guns.
4. Transfers the product to the paint ovens.
During the entire process, the system must control the shop fans.
Store and reset an action
Typically, an action turns off (stops executing) when the SFC goes to the next
step. To keep a device on from step to step without a bump, store the action that
controls the device.
1. In the step that turns on the device, assign a stored qualifier to the action
that controls the device.
2. In the step that turns off the device, use a Reset action.
The following figure shows the use of a stored action.
Step that starts
the action
Store the action name that you
want to execute for more than
one step
• (more steps)
•
Step that stops
the action
Reset the same action name as
the stored action
Rockwell Automation Publication 1756-PM006F-EN-P - October 2014 43