Rockwell Automation Publication 2080-UM002G-EN-E - March 2015 227
Appendix
D
User Interrupts
Interrupts allow you to interrupt your program based on defined events. This
chapter contains information about using interrupts, the interrupt instructions,
and interrupt configuration. The chapter covers the following topics:
For more information on HSC Interrupt, see Use the High-Speed Counter and
Programmable Limit Switch on page 119.
Information About Using
Interrupts
The purpose of this section is to explain some fundamental properties of the User
Interrupts, including:
• What is an interrupt?
• When can the controller operation be interrupted?
• Priority of User Interrupts
• Interrupt Configuration
• User Fault Routine
What is an Interrupt?
An interrupt is an event that causes the controller to suspend the Program
Organization Unit (POU) it is currently performing, perform a different POU,
and then return to the suspended POU at the point where it suspended. The
Micro830 and Micro850 controllers support the following User Interrupts:
• User Fault Routine
• Event Interrupts (8)
• High-Speed Counter Interrupts (6)
• Selectable Timed Interrupts (4)
• Plug-in Module Interrupts (5)
Topic Page
Information About Using Interrupts 227
User Interrupt Instructions 231
Using the Selectable Timed Interrupt (STI) Function 237
Selectable Time Interrupt (STI) Function Configuration and Status 237
Using the Event Input Interrupt (EII) Function 239
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