In industrial automation, simply installing devices and sensors physically is not enough; they need to communicate with each other and with central PLC controllers, meaning they must exchange data efficiently. Unlike office networks, industrial environments require continuous operation, high reliability, and resistance to strong electromagnetic interference. To meet these requirements, various industrial network protocols have been developed. One of the most frequently asked questions among automation engineers is “What is Modbus RTU?” and how it differs from other communication systems.
The Modbus RTU protocol operates physically over a two-wire RS-485 line and has a simple yet highly reliable structure. RS-485 is essential for connecting dozens of temperature sensors, inverters, and other field devices to a PLC over distances of several kilometers. When a computer or control center needs to access this data, professional RS485 converter modules are used to provide communication through USB or Ethernet ports.
On the other hand, in large industrial plants where faster and deterministic communication is required, Profibus and Profinet systems, developed by Siemens, are among the leading solutions. In Baku industrial facilities, the specially shielded violet Profibus cable is one of the most widely used industrial cables.
In the modern Industry 4.0 era, Ethernet-based protocols such as Profinet, Ethernet/IP, and Modbus TCP are becoming increasingly important. Since standard office network components are not suitable for these environments, industrial-grade Profinet switch devices are used. Data collected through these networks is visualized by centralized SCADA systems and monitored by operators in real time.
Artek.az provides complete solutions for PLC communication projects, including all types of industrial cabling, converters, and interface modules.