Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 234)

234 Publication IASIMP-QS010B-EN-P - October 2009
Chapter 5 Program the Packaged Controller
Program the Controller This chapter provides information about programming your CompactLogix
packaged controller by using RSLogix 5000 programming software.
Tasks
The CompactLogix packaged controllers can be programmed to implement up
to three tasks. These three tasks can be any combination of Event and Periodic
tasks with a limit of one continuous task.
When programming your packaged controller, you can use multiple tasks to
schedule and prioritize the execution of your programs based on specific
criteria. Doing so divides your packaged controller’s processing time among
the different operations in your application.
When programming your packaged controller’s tasks, remember that:
• the controller executes only one task at one time.
• one exception task can interrupt another and take control.
• in any given task, only one program executes at one time.
Add a Task
To add a controller task, right-click the Tasks folder in the RSLogix 5000
software configuration tree and choose New Task.
Specify the task’s properties according to your application requirements.
For more information about using and managing tasks, see these publications:
• Logix5000 Controllers Design Considerations Reference Manual,
publication
1756-RM094
• Logix5000 Controllers Common Procedures Programming Manual,
publication
1756-PM001
Programs and Equipment Phases
The CompactLogix packaged controllers support up to 16 scheduled
programs or equipment phases, per task. However, this limit does not include