Mitsubishi Electric FX3G SERIES Programming Manual page 150

Programmable controllers

Hide thumbs Also See for FX3G SERIES:

Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

2. Pointers for timer interrupt: 3 points

The PLC executes an interrupt routine program at every specified interrupt cycle time (10 to 99 ms).

Use these pointers for control requiring cyclic processing regardless of the operation cycle of the PLC.

This function is supported only in FX

Cleared when the PLC mode switches from RUN to STOP.

It is recommended to set the timer interrupt time to 10 ms or more. When the timer interrupt time is set to 9 ms or less,

the timer interrupt processing may not be executed at an accurate cycle in the following cases:

• When the processing time of the interrupt program is long

• When an instruction requiring long processing time is used in the main program

Interrupt enabled

Rising edge of X000 is detected

Interrupt routine [1]

Rising edge of X001 is detected

Interrupt routine [2]

Interrupt cycle (ms)

An integer ranging from 10 to 99 is put in "

Ex: I610 = Timer interrupt at every 10 ms

Interrupt is usually disabled in the PLC.

If interrupt is enabled by EI instruction, when

X000 or X001 turns ON while a program is

scanned, the PLC executes the interrupt

routine [1] or [2], and then returns to the main

program by IRET instruction.

Make sure to program a pointer for interrupt

(I***) as a label after FEND instruction.

→ For details on timer interrupt function, refer to Section 36.5.

" portion of the pointer name.

4 Devices in Detail

4.12 Pointer [P and I]

Interrupt disabling flag

Fx3u series Fx3uc series