Rockwell Automation Publication 5069-UM002A-EN-P - January 2019 179
Chapter 8
Develop Control Applications
Elements of a
Control Application
A control application consists of several elements that require planning for
efficient application execution. Application elements include the following:
•Tasks
•Programs
• Routines
• Parameters and Local Tags
• Add-On Instructions
Topic Page
Elements of a Control Application 179
Tasks 181
Programs 186
Routines 188
Parameters and Local Tags 189
Programming Languages 190
Add-on Instructions 191
Extended Properties 192
Access the Module Object from an Add-On Instruction 193
Monitor Controller Status 194
Connection Overview 195
Controller Communication Interaction with Control Data 195
Produce and Consume (Interlock) Data 197
Send and Receive Messages 199
Monitor I/O Connections 200