What is Modbus Protocol? Edge Computing Transformation with HUBBOX X1, X2 & Node-RED

Developed by Modicon in 1979, Modbus has been the common language of industrial automation for decades. However, in the Industry 4.0 era, transmitting raw Modbus data from thousands of devices to the cloud causes massive bandwidth and cost waste. This is where HUBBOX Connect X1 and X2 Industrial Routers step in, transforming Modbus communications into a smart, filtered, and secure IoT infrastructure through "Edge Computing" and "Node-RED" capabilities.

1. Basic Industrial Terminology Guide

To understand how the devices in your field will integrate with HUBBOX, let's briefly review the industrial network terminology:

2. Modbus Communication Types (RTU vs TCP/IP)

Based on the communication method, Modbus is divided into two main categories. HUBBOX devices simultaneously support both architectures and can convert them into each other seamlessly (Modbus Gateway).

3. How Does the Master / Slave Architecture Work?

The Modbus protocol relies on a classic "Request-Reply" logic. There is one interrogator (Master/Client) and multiple responders (Slave/Server) on the network. A temperature sensor does not send data on its own; it waits until the Master device requests the data.

4. HUBBOX X1, X2 & Edge Computing: Legacy Modbus Meets Intelligence

Traditional routers take field data and send it directly to the cloud as is. However, our HUBBOX Connect X2 device is much more than a router thanks to its Edge Computing architecture and embedded Node-RED server; it is an AI-supported industrial computer that can make decisions locally in the field.