CCST 08 — Simple PLC Program Structure

Briefing

Three independent rungs: LIGHT_A := SWITCH_A; LIGHT_B := SWITCH_B; LIGHT_C := SWITCH_A AND SWITCH_B. Demonstrates rung-by-rung evaluation.

Objectives

• LIGHT_A follows SWITCH_A
• LIGHT_B follows SWITCH_B
• LIGHT_C is on only when both switches are on

I/O Table

Your program will be tested against:

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

1. #1Only A on

   Only A on

2. #2Both on — all lights

   Both on — all lights