98 Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Chapter 7 Develop Applications
Develop Programs
The controller’s operating system is a preemptive multitasking system that is IEC
1131-3 compliant. This environment provides:
• tasks to configure controller execution.
• programs to group data and logic.
• routines to encapsulate executable code written in a single programming
language.
Figure 18 - Program Development
Control Application
Controller Fault Handler
Task 8
Task 1
Configuration
Status
Watchdog
Program 32
Program 1
Main Routine
Fault Routine
Program (local)
Tags
Other Routines
Controller (global) Tags I/O Data System-shared Data
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