User manual

69 Publication 1768-UM001C-EN-P - November 2007
Chapter 7
Develop Applications
Introduction
This chapter explains how to develop applications.
Managing Tasks
A Logix5000 controller lets you use multiple tasks to schedule and prioritize
the execution of your programs based on specific criteria. This multitasking
allocates the controller’s processing time among the different operations in
your application.
Topic Page
Managing Tasks 69
Developing Programs 70
Organizing Tags 74
Selecting a Programming Language 75
Monitoring Controller Status 77
Monitoring Connections 77
Select a System Overhead Percentage 80
Additional Resources 83
IMPORTANT
• The controller executes only one task at a time.
• One task can interrupt another executing task and take control.
• In any given task, only one program executes at a time.