User manual

Publication 1768-UM001C-EN-P - November 2007

70 Develop Applications

Developing Programs

The controller 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.

Program Development Overview

Control Application

Controller Fault Handler

Task 8

Task 1

Configuration

Status

Watchdog

Program 32

Program 1

Main Routine

Fault Routine

Program (local)