Modbus ASCII communication between Raspberry Pi and HMI Delta using Codesys

Modbus is a communication protocol used for transmitting data between electronic devices over serial lines. In this article, we will discuss how to establish Modbus ASCII communication between a Raspberry Pi and an HMI Delta using Codesys.

Raspberry Pi: The Raspberry Pi is a small, affordable computer that can be used for a variety of projects. In this case, we will be using it as a Modbus ASCII master to communicate with the HMI Delta.

HMI Delta: The HMI Delta is a human-machine interface that allows users to interact with machines and systems. In this case, we will be using it as a Modbus ASCII slave to communicate with the Raspberry Pi.

Codesys: Codesys is a development tool used for programming industrial automation systems. It supports various communication protocols, including Modbus ASCII.

Setting up Modbus ASCII communication

1. Connect the Raspberry Pi and HMI Delta to the same network.

2. Install Codesys on the Raspberry Pi and create a new project.

3. Add a Modbus ASCII master device to the project and configure the communication settings.

4. Write the required code to read and write data from the HMI Delta using Modbus ASCII protocol.

5. Install the Modbus ASCII slave library on the HMI Delta and configure the communication settings.

6. Configure the slave device on the HMI Delta to match the settings on the master device in Codesys.

Testing the communication

Once the setup is complete, you can test the communication between the Raspberry Pi and HMI Delta by sending and receiving data using Modbus ASCII protocol.

With the Modbus ASCII communication successfully established, you can now control and monitor the HMI Delta from the Raspberry Pi using Codesys.

Overall, Modbus ASCII communication between the Raspberry Pi and HMI Delta using Codesys provides a reliable and efficient way to integrate these devices in industrial automation systems.