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🏭 PLC Beginner

Traffic Light Control System Using PLC

Learn how to program a PLC to control a 4-way traffic light intersection with pedestrian crossing buttons.

Published: Dec 07, 2025
Components: 5 items

🔧 Required Components

  • PLC (Siemens S7-1200 or equivalent) (×1)
  • Traffic light modules (Red, Yellow, Green) (×4)
  • Push buttons for pedestrian crossing (×4)
  • Emergency stop button (×1)
  • 24V DC power supply (×1)

📋 Instructions

Project Overview

This project demonstrates the basics of PLC ladder logic programming by creating a realistic traffic light control system.

Learning Objectives

  • Understand PLC basics and ladder logic
  • Learn timer and counter functions
  • Implement sequential control
  • Handle emergency inputs

Implementation Steps

  1. Design the traffic light sequence logic
  2. Create ladder logic diagram
  3. Configure I/O modules
  4. Test emergency stop functionality
  5. Add pedestrian crossing feature

🏷️ Tags

PLC Ladder Logic Traffic Control Automation Siemens Industrial Control
AR