Mitsubishi Electric MELSEC Q Series Reference Manual page 286

(3) Devices used in the program example
(a) Special relay (SM)
Device
SM400
(b) Devices used by the user
Device
I51
(4) Program example
The following shows a program example of interrupt request.
The following program is written to station No. 2.
284
Description
Always ON
Description
Interrupt pointer when Data link status of own
station (SB0049) is ON.
Main routine program
Interrupt program
Device Description
—
Device Description
—
Interrupt enabled.
End of main routine
program
End of interrupt
program