Topic: CL176
| Return Instruction |
Topic: CL176
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The Return instruction is used to return to the Main Program from a Subroutine Program or Interrupt Program. The Return instruction can be Conditional or Unconditional. Conditional means the rung including a Return instruction has Contacts. Unconditional means that there is no Contact on the rung including the Return instruction.
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Note: The Return instruction is available from the Instruction Menu or the Instruction List, but it is only visible on the Instruction List when viewing a Subroutine Program or Interrupt program. |
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Position the Box Cursor on the Coil Area of the rung you have selected. This will be the enabling rung for the Return instruction. Select Return from the Instruction Menu > Program Control or the Instruction List. The Return instruction is only visible on the Instruction List when viewing the Main Program.
Example Program 1: Unconditional Return
When this rung is executed, the Program execution goes back to the Main Program.
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Caution: Any Subroutine Program and Interrupt Program must have an Unconditional Return. |
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Example Program 2: Conditional Return
When C1 is ON, the Program execution goes back to the Main Program.
Call Instruction
Quick Guide Subroutine
Quick Guide Interrupt
