Beginner 01 — Switch turns on Light

Briefing

Your first PLC program. When SWITCH is ON, LIGHT turns ON. When SWITCH is OFF, LIGHT turns OFF. That's it — one simple instruction. In Ladder, a normally-open contact reads SWITCH and a coil writes LIGHT. In Structured Text, the same logic is a direct assignment: LIGHT := SWITCH;

Objectives

• When SWITCH is true, LIGHT turns on
• When SWITCH is false, LIGHT turns off

I/O Table

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

1. #1SWITCH true → LIGHT on

   Closing the switch turns on the light

2. #2SWITCH false → LIGHT off

   Opening the switch turns off the light