DNP3 (Distributed Network Protocol) is widely used in power systems, water utilities, and industrial SCADA systems. One of its most misunderstood features is the event class system. Many engineers assume that Class 1, 2, and 3 represent fixed priorities defined by the protocol. In reality, DNP3 works differently. This article explains what DNP3 event classes really are, how… Read More »
IEC 60870-5-104 (IEC-104) is one of the most widely used telecontrol protocols in electrical power systems. It plays a central role in communication between substations, RTUs, and control centers, especially in transmission and distribution SCADA systems. IEC-104 is reliable, efficient, and well understood by utilities worldwide. However, when the protocol was originally designed, cybersecurity was not a primary… Read More »
SCADA software (Supervisory Control and Data Acquisition) is a critical technology used to monitor, control, and automate industrial processes across factories, utilities, energy systems, and infrastructure. While many commercial SCADA systems come with high licensing costs, free SCADA software has become a powerful and practical alternative for students, engineers, hobbyists, and small businesses. Today, there are several open-source… Read More »
Everything engineers need to know about Basic Types, Common Data Classes, and how they appear in GOOSE, Sampled Values, MMS, and SCL. IEC 61850 is much more than a communication protocol—it is a semantic language designed to describe protection, control, measurement, and automation inside modern substations. At the core of this language lies one essential concept: 👉 Every… Read More »
Modern industrial networks depend heavily on remote communication. Whether it is a control center talking to a substation, a SCADA system collecting data from a water pump, or a utility monitoring dozens of remote field stations, the network path between these locations must be reliable, secure, and predictable. Two common technologies are used today to connect a central… Read More »
The CIP protocol (Common Industrial Protocol) is an open, object-oriented communication standard used across modern industrial automation. It defines how devices organize data, how services are requested, and how real-time I/O and safety/motion extensions operate—while running over multiple network types such as EtherNet/IP, DeviceNet, ControlNet, and CompoNet. This guide explains CIP’s architecture, object model, messaging, connections, safety and… Read More »
Modbus is a simple protocol, but the values inside registers can be displayed in many different ways. A single 16-bit register can represent: The challenge is that the Modbus protocol never tells you how to interpret the number. Only the device’s documentation explains the meaning. To decode Modbus data correctly, engineers must understand the different data type formats… Read More »
Industrial networks depend heavily on reliable and continuous communication. Protection devices, SCADA gateways, and automation controllers must exchange information with strict timing and without interruption. Even a brief communication loss can cause protective functions to misoperate or lose visibility of the grid. To avoid this, industrial networks rely on seamless Ethernet redundancy methods that guarantee zero-time recovery. The… Read More »
High-Availability Seamless Redundancy, or HSR, is one of the most advanced real-time redundancy mechanisms in industrial communication. It is mostly used in IEC 61850 digital substations, protection and control systems, and process bus networks where communication cannot stop even for a fraction of a second. HSR ensures zero-time recovery, meaning communication continues without interruption even during link or… Read More »
Parallel Redundancy Protocol (PRP) is a method used in industrial networks to make sure communication never stops—literally never. Many systems around us depend on constant data flow to stay safe and reliable. Think of power substations, industrial robots, trains, chemical plants, and automated production lines. If the network drops even one message, things can go wrong or shut… Read More »