Справочник Пользователя для Mitsubishi Electronics QCPU

6-139

IRET

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.6 Progr

am Execution Contr

ol I
nstr
uctions

6

.6.2 Recovery from interr

upt pr

ograms (IR

E

T

)

Recovery from interrupt programs (IRET)

IRET

Function

(1) Indicates the completion of interrupt program processing.

(2) Returns to sequence program processing following the execution of the IRET instruction.

Operation Error

(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and 

an error code is stored into SD0.
 • There is no pointer corresponding to the interrupt number.

(Error code: 4220)

 • The IRET instruction was executed before the interrupt program is executed.

(Error code: 4223)

 • The END, FEND, GOEND, or STOP instruction has been executed after the generation of 

an interrupt and prior to the execution of the IRET instruction.

(Error code: 4221)

 • The IRET instruction was executed during the fixed scan execution type program. 

(For the Universal model QCPU only)

(Error code: 4223)

Setting 

Data

Internal Devices 

R, ZR

J

\

U

\G

Zn

Constants

Other

Bit

Word

Bit

Word

––

––

IRET

I

IRET

**