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35 Interrupt Function and Pulse Catch Function

804

FXCPU Structured Programming Manual

[Basic & Applied Instruction]

35.4 Input Interrupt (Interrupt by External Signal) [With Delay function]

35.4

Input Interrupt (Interrupt by External Signal) [With Delay function]

1. Outline

An input interrupt has the function to delay execution of an interrupt routine in units of 1 ms.
The delay time can be specified using the pattern program shown below.
By using the delay function, the mounting position of a sensor used for input interrupts can be adjusted
electrically without changing the actual position.
The FX

, FX

1NC

, FX

2N,

2NC,

3S,

or FX

3GC

PLC does not

support this function.

2. Programming procedure

3. Timing chart

D8393

M8393

MOV

ENO

1) Delay time (unit: ms)

Program to be executed as input interrupt

Contact for setting delay time

Delay time specification program
Be sure to describe the delay time specification program
shown on the left at the head of an interrupt routine program.
Because this program is a pattern program, change only the
delay time 1).
Only a constant (K) or data register (D) is available for
specifying the time here *.

[Interrupt program]
(Event: I )

Interrupt input(X000 to X005)

Interrupt input is
executed

Because the previous interrupt processing is not
completed, the interrupt processing is not executed here.

Valid

Delay time (ms)

IRET instruction