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3-6 Example of a Ladder Program Using
a Timer Instruction
3-6-1 Self-holding Rung
Create a self-holding rung to turn ON L1 when SW1 is pressed and stay lit until SW2 is
pressed.
1. Create the program offline.
2. Delete the program created in 3-5 Example of a Basic Ladder Program.
Right-click the rung numbers to delete while holding down the Ctrl Key. Press the Delete
Key.
Although the ladder program is deleted, the I/O Map settings are not deleted and remain the
same as those configured in 3-3-2 I/O Map Setting.
3. Create the following rungs.
4. Click the SW1 input, and then press the W Key to insert L1 in an OR structure.
Self-holding rung
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