Omron CP - PROGRAMMING MANUAL 05-2007 - Page 703

670
Subroutines Section 3-18
Subroutines can be nested up to 16 levels. Nesting is when another subrou-
tine is called from within a subroutine program, such as shown in the following
example, which is nested to 3 levels.
Note A subroutine can be called more than once in a program.
SBN 10
SBN 11
RET
SBN 11
SBS 12
RET
RET
SBN 12
Execution condition ON
Main program
Execution condition ON
Subroutine
program n
Two-level
nesting
Subroutine
program m
Program end