Zakaria El Intissar

I've spent 13 years in power system automation, electrical protection, and SCADA communication, as an automation and industrial computing engineer. ScadaProtocols.com is where I turn what I've learned on site into plain guides and working tools — so other engineers can decode, analyze, and troubleshoot industrial communication protocols without the guesswork.

Author Archives: Zakaria El Intissar

RS-485 vs Ethernet: Choosing the Right Network for Modbus

When setting up a Modbus network, one of the key decisions is choosing the right physical communication layer — RS-485 vs Ethernet. Both options support the Modbus protocol (Modbus RTU for RS-485 and Modbus TCP for Ethernet), but they differ in wiring, speed, distance, and application. This article explains the differences between RS-485 vs Ethernet for Modbus communication… Read More: RS-485 vs Ethernet: Choosing the Right Network for Modbus »

How to Convert Modbus RTU to Modbus TCP: Gateway Setup and Frame Translation

You have a SCADA system on an Ethernet network speaking Modbus TCP/IP. You also have dozens of field devices — energy meters, VFDs, PLCs, temperature controllers — connected via RS-485 speaking Modbus RTU. They cannot talk to each other directly. Modbus RTU uses serial communication with CRC-16 error checking. Modbus TCP uses Ethernet with a TCP/IP stack and… Read More: How to Convert Modbus RTU to Modbus TCP: Gateway Setup… »

Modbus RTU vs Modbus TCP/IP — Frame Structure and Key Differences

Modbus is one of the most widely used communication protocols in industrial automation and control systems. Originally designed for serial networks, Modbus evolved to work seamlessly over Ethernet and IP networks, creating two common variants — Modbus RTU and Modbus TCP/IP. Although both use the same core data model and function codes, they differ in frame structure, transmission… Read More: Modbus RTU vs Modbus TCP/IP — Frame Structure and Key… »

Modbus Protocol Explained: RTU, TCP, ASCII, Frames, Function Codes & Examples

Welcome to this article dedicated to the Modbus protocol. In this comprehensive guide, we will explore in detail this widely used protocol in the field of industrial automation. Whether you are a student or an engineer, this introduction will provide you with the necessary basics to understand and implement the Modbus protocol. The Modbus protocol is an open… Read More: Modbus Protocol Explained: RTU, TCP, ASCII, Frames, Function Codes &… »