GOOSE messages are high-speed Ethernet signals used in modern substations to share protection and control information between devices. Although they may look technical, decoding them with Wireshark is actually very easy. With just a few filters and clicks, you can see events, state changes, and dataset values in real time. In this guide, you’ll learn step-by-step how to… Read More »
IEC-60870-5-104 (IEC-104) is one of the most widely used protocols for telecontrol communication in power utilities, substations, renewable energy sites, industrial automation, and critical infrastructure networks. Its simplicity, efficiency, and ability to run over standard TCP/IP networks make it attractive for SCADA systems worldwide. But IEC-104 has a serious security problem: IEC-104 has no built-in security — no… Read More »
Sampled Values (SV) are one of the core technologies behind modern IEC 61850 digital substations. They allow current and voltage measurements from CTs and VTs to be transmitted as digital Ethernet messages instead of analog signals over copper wires. If GOOSE replaces binary wiring, Sampled Values replace CT/VT analog wiring. This article explains how SV works, why it… Read More »
IEC 61850 has transformed how substations communicate. In the past, everything depended on copper wiring, physical contacts, and slow serial links. Today, digital substations use Ethernet-based messages that move information instantly between IEDs. Two of the fastest and most important IEC 61850 services are: Even though both use Ethernet multicast, they serve completely different purposes. GOOSE carries decisions… Read More »
The IEC 60870-5-103 (IEC 103) protocol remains one of the most widely used communication standards for protection equipment in electrical substations. Engineers, technicians, and SCADA developers rely on it to exchange event data, trip information, timestamps, and analog values between protection relays and control systems. Whether you’re commissioning new equipment or analyzing fault records, having a reliable IEC… Read More »
Looking for a fast, free, and reliable way to decode Modbus frames online? Our Modbus Frame Decoder Online Tool is the ultimate browser-based Modbus analyzer for engineers, technicians, and students. Decode or encode Modbus RTU and Modbus TCP frames instantly—no downloads, no installations, and 100% free. Whether you’re troubleshooting PLC communication, debugging SCADA data, or learning Modbus protocol… Read More »
In the world of industrial automation and SCADA systems, the DNP3 protocol (Distributed Network Protocol 3) plays a critical role in enabling secure and reliable data communication between devices. Whether you’re a utility engineer, cybersecurity analyst, or automation developer, decoding DNP3 frames is essential for troubleshooting, compliance, and interoperability. Manually decoding DNP3 hexadecimal data is time-consuming and error-prone.… Read More »
The IEC 60870-5-104 protocol (usually called IEC-104) is one of the main communication standards used in SCADA and substation automation. It defines how control centers, RTUs, and gateways exchange data over TCP/IP networks. If you work with substations, automation, protocol testing, or energy systems, you’ve probably seen IEC-104 hex frames. Reading these frames by hand is slow and… Read More »
GOOSE (Generic Object Oriented Substation Event) is one of the most important communication services defined in IEC 61850. It is used to exchange fast, event-driven messages between protection IEDs, bay controllers, and automation devices. GOOSE is designed to carry protection signals such as trips, interlocks, blockings, permissives, and alarms with very low latency and high reliability, replacing copper… Read More »
Data Sets are one of the most important concepts in IEC 61850. They define which values inside an IED are grouped together so the device can report them, log them, publish them over GOOSE, or return them in a single MMS read request. Anyone working with protection relays, SCADA integration, automation logic, or commissioning eventually deals with Data… Read More »