32.6.3 RET (Return)
Symbols and Features
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Ladder Instruction Name
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Ladder Symbol
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Feature
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Number of Steps
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RET
(Return)
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Control
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1
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RET instructions return the program from a subroutine to the
original JSR instruction call, and continues executing instructions
in rungs that follow.
Use RET instructions to interrupt the subroutine and return to
the MAIN program.
Because the program automatically returns to the caller after
the subroutine processing ends, it is not always necessary to use
an RET instruction.
Place RET instructions at the end of rungs. RET instructions can
only be used in subroutines.
Program Example
RET
RET instructions can only be used in subroutines. When the jump
to subroutine instruction is executed in MAIN, the program flow
moves to the subroutine. The subroutine processes instructions in
rungs 1 and 2. If the variable for the normally open instruction in
rung 3 is ON, the RET instruction is executed and returns the
program flow to MAIN without executing the fourth rung.
When the RET instruction is not executed, the program is
executes the fourth rung, then returns the program to MAIN after
the subroutine ends (END).
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