Omron SYSMAC CS Series Instruction & Reference Manual page 652

3. Instructions
Multiple global subroutine regions (GSBN(751) to
GRET(752)) can be defined in interrupt task 0.
An SBS(091) or GSBS(750) instruction can be
written within a subroutine region (SBN(092) to
RET(093)) or global subroutine region (GSBN(751)
to GRET(752)) to "nest" subroutines. Subroutines
can be nested up to 16 levels.
618
Cyclic or interrupt task
0.01
Interrupt task 0
Subroutine functions
divided by task.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Execution
condition ON
0.00
GSBS
n
B
GSBS
m
D
END
GSBN
n
A
GRET
GSBN
m
C
GRET
END
Interrupt task 0
GSBN 10 GSBN 11
to to
GSBS 11 GSBS 12
to to
GRET GRET
B
Execution
condition ON
D
A
C
GSBN 12
to
GRET