KEYENCE Visual KV Series User Manual

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2.4 Instruction Details

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Chapter 2 Instructions

■ Calling a subroutine from an interrupt program
•

Subroutines can be called from interrupt programs.

•

A subroutine which is called from an interrupt program should be defined before
the call.

Note 1: Subroutine Nos. for SBN instructions cannot be duplicated in a program.
(It can be duplicated for CALL instructions.)

Note 2: When a subroutine is executed, the scan time is extended by the time
needed for subroutine execution.

Note 3: The following instructions cannot be used in subroutines:

STG, JMP, ENDS, INT, RETI, and MEMSW

Note 4: The following instructions can be used only in subroutines which are ex-
ecuted every scan time:

TMR, TMH, TMS, C, SFT, UDC, DIFU, DIFD, W-UE, W-DE, HKEY, ITVL,
and Differentiation type instruction (@xxx)

SBN

0001

CALL

0002

INT

0000

ENDH

RET

RETI

END

0500

Call

Program

Subroutine program

CALL / SBN / RET

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