User manual

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 147
Chapter 10
Develop Applications
Elements of a
Control Application
A control application is comprised of several elements that require planning for
efficient application execution. Application elements include the following:
• Ta sk s
• Programs
• Routines
• Parameters and Local Tags
Topic Page
Elements of a Control Application 147
Tasks 148
Programs 151
Routines 154
Parameters and Local Tags 155
Programming Languages 158
Add-On Instructions 159
Access the Module Object 160
Monitoring Controller Status 161
Monitoring I/O Connections 162
System Overhead Time Slice 165