Mitsubishi Electric FX3G SERIES Programming Manual page 151

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

3. Pointers for counter interrupt: 6 points

The PLC executes an interrupt routine based on the comparison result obtained by the comparison set instruction for

high-speed counter (DHSCS instruction).

Use these pointers for control requiring an interrupt routine based on the counting result from high-speed counters.

This function is supported only in FX

Cleared when the PLC mode switches from RUN to STOP.

Interrupt is

Main program

Interrupt at every 20 ms

Interrupt return

→ For details on counter interrupt function, refer to Section 36.6.

Interrupt disabling flag

Timer interrupt is enabled after EI instruction.

It is not necessary to program DI (disable

interrupt) instruction when no zone to disable

timer interrupt is needed.

"FEND" indicates the end of the main

Make sure to describe an interrupt routine

after "FEND".

The PLC executes an interrupt routine at every

The PLC returns to main program by IRET

instruction.

4 Devices in Detail

4.12 Pointer [P and I]

Interrupt disabling flag

Fx3u series Fx3uc series