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35 Interrupt Function and Pulse Catch Function

811

FXCPU Structured Programming Manual

[Basic & Applied Instruction]

Appl
ied

stru
cti

ons

(Da
ta

rans
fer
3)

plied
Instru
ctio
ns

(High S

peed

Process

ing 2)

App
lied Instr

ucti

ons

(Exte

nsion File

Regis

ter C
ontrol

)

ied In
struct

ions

(FX

-C

F-

AD
P)

Int

errupt
Fun
cti

and Puls

e Cat

Functi

lation

n de
vic

d ad
dre
ss

plie

structio

n List

35.7 Pulse Catch Function[M8170 to M8177]

5. When setting an interrupt output (Y or M) to ON or OFF using a high speed counter

When only controlling the ON/OFF status of an output relay (Y) or auxiliary relay (M) according to the current
value of a high speed counter, a required program can be easily created using DHSCS, DHSCR or DHSZ
instruction.

6. Cautions

1) Pointer number

Pointer numbers cannot overlap with each other.

2) Disabling interrupts

When the special auxiliary relay M8059 is set to ON in a program, all counter interrupts are disabled.

35.7

Pulse Catch Function[M8170 to M8177]

When the input relay X000 to X007 turns ON from OFF after the EI instruction is executed, the special
auxiliary relay M8170 to M8177 is set for interrupt processing.
The FX

, FX

1NC

, FX

or FX

3GC

PLC does not require the EI instruction.

1. Assignment of input numbers and special auxiliary relays

*1.

Differs from one PLC to another.
FX

, FX

1NC

, FX

2NC

, FX

3GC

: Supports X000 to X005 only.

, FX

: Supports X000 to X003 only.

*2.

Cleared when the PLC mode is changed from STOP to RUN.

Pulse catch input

Pulse catch relay

X000

M8170

(M8065

in the

, FX

and FX

PLCs)

X001

M8171

(M8057

in the

, FX

and FX

PLCs)

X002

M8172

(M8058

in the

, FX

and FX

PLCs)

X003

M8173

(M8059

in the

, FX

and FX

PLCs)

X004

M8174

X005

M8175

X006

M8176

X007

M8177