Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 343)

Chapter 25
Control Instructions
25–11
Important: The information here is for reference only and is optional.
Program these instructions using the information appearing in
chapter 30.
Selectable Timed Interrupt Disable and Enable (STD, STE)
These instructions are generally used in pairs. The purpose is to prevent the
STI from occurring during a portion of the ladder program.
Selectable Timed Interrupt Start (STS)
The Selectable Timed Start (STS) function is used to initiate or restart the
STI function. Instruction parameters are the STI file number and the STI
setpoint.
SLC 5/02 Processors Only
Interrupt Subroutine INT Input Instruction
INT
F1 F2 F3 F4 F5
ZOOM on INT –|INT|– 2.3.0.0.1
NAME: I/O INTERRUPT
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
(online monitor mode)
INT
INTERRUPT SUBROUTINE
This instruction serves as a label or identifier of a program file as an interrupt
subroutine (INT label) versus a regular subroutine (SBR label). It can be
used to identify Selectable Timed interrupts or I/O event–driven interrupts.
This instruction has no control bits and is always evaluated as true. The
instruction must be programmed as the first instruction of the first rung of the
subroutine.
Interrupt Subroutine (INT)