CODESYS example: TrafficLight-Webvisu

This tutorial demonstrates how to create a simple web visualization of traffic lights on a RevPi using CODESYS WebVisu.

Prerequisites

Hardware

✓ RevPi Connect+ as base module (you can use a RevPi Core or a RevPi Compact instead)

✓ RevPi DIO as expansion module

For detailed instructions about how to set up your system, see Getting Started.

Software Requirements

✓ CODESYS Development System is installed on your PC

To ensure a compatible system with suitable software, see CODESYS System Requirements.

Overview

The application simulates a traffic light system with the following modes:

1. Normal Mode:

   • Red and green lights are active for 10 seconds each.
   • Yellow light acts as a transition for 2 seconds.

2. Night Mode:

   • Only the yellow light flashes in this mode.

The following figure provides an overview of the CODESYS device tree for the setup:

Adapting for RevPi Core or Compact

To adapt the project for RevPi Core or RevPi Compact:

▷ Right-click on RevPi Connect in the CODESYS device tree.

▷ Select Update device.

▷ Choose RevPi Core or RevPi Compact as the replacement and rename the device accordingly.

Deploy and Test the Application

1. Compile and Download:

   ▷ Ensure there are no errors in your program.

   ▷ Download the application to the RevPi Connect.

2. Access the Web Visualization:

   ▷ Open a browser and navigate to your RevPi Connect’s web server:

   http://<RevPi-IP-Address>:8080/webvisu.htm

   Example: http://192.168.168.159:8080/webvisu.htm.

   

Adapting for RevPi Core or Compact

3. Test the Traffic Light:

   ▷ Verify normal mode operation with the specified durations.

   ▷ Toggle the night mode switch and observe the yellow light flashing.

Additional Notes

• Ensure your RevPi Connect and DIO modules are properly connected and configured in the CODESYS device tree.
• The visualization design can be customized to include additional controls or indicators as needed.