User Interrupt Instructions; Int - Interrupt Subroutine - Allen-Bradley MicroLogix 1400 Instruction Manual

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312 Using Interrupts
User Interrupt
Instructions
INT - Interrupt
Subroutine
INT INT
I/O Interrupt
Publication 1766-RM001A-EN-P - October 2008
Instruction Used To:

INT - Interrupt Subroutine

Use this instruction to identify a program file as an
interrupt subroutine (INT label) versus a regular
subroutine (SBR label). This should be the first
instruction in your interrupt subroutine.
STS - Selectable Timed Use the STS (Selectable Timed Interrupt Start)
Start instruction to the start the STI timer from the control
program, rather than starting automatically.
UID - User Interrupt Use the User Interrupt Disable (UID) and the User
Disable Interrupt Enable (UIE) instructions to create zones in
which I/O interrupts cannot occur.
UIE - User Interrupt Enable
UIF - User Interrupt Flush Use the UIF instruction to remove selected pending
interrupts from the system.
Instruction Type: input
Execution Time for the INT Instruction
Controller When Rung Is:
True
MicroLogix 1400 0.5460 µs
The INT instruction is used as a label to identify a user interrupt service
routine (ISR). This instruction is placed as the first instruction on a rung
and is always evaluated as true. Use of the INT instruction is optional.
False
0.5460 µs
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