Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 264)

Instructions
Chapter 18
I/O Message and Communication
18–18
The I/O Event-Driven Interrupt function is used with specialty I/O modules
capable of generating an interrupt. You specify a subroutine to be executed
upon receipt of such an interrupt.
Important: Refer to chapter 31, Understanding I/O Interrupts – SLC 5/02
Processor Only, before you use these instructions in your
program.
Programming an I/O event interrupt is done through locations in the status
file.
I/O Interrupt Disable and Enable (IID, IIE)
These instructions are generally used in pairs to prevent I/O interrupts from
occurring during time-critical or sequence-critical portions of your main
program or subroutine. These are also optional and are used to disable an
I/O interrupt.
Reset Pending I/O Interrupt (RPI)
This instruction resets the pending status of the specified slots and informs
the corresponding I/O modules that you have aborted their interrupt requests.
This is also optional and is used to disable an I/O interrupt.
Entering Parameters
IID instruction – Enter a 0 (reset) in a slot position to indicate a disabled I/O
interrupt.
IIE instruction – Enter a 1 (set) in a slot position to indicate an enabled I/O
interrupt.
RPI instruction – Enter a 0 (reset) in a slot position to indicate the pending
status of an I/O interrupt is reset (aborted).