300+ SCADA Protocol Articles & Guides
Deep dives on Modbus, DNP3, IEC 60870-5-101/104, IEC 61850, OPC UA, Profinet, MQTT, IEC 62443, and substation automation — written for practicing engineers.
Wireshark DNP3: Capture, Filter, Troubleshoot
Wireshark DNP3 analysis end to end: display filters, function codes, IIN bits, quality flags, CRC errors, and how to trace an unsolicited response.
SCADA Protocol Analyzer: Decode Industrial Protocols on Your Phone
Decode DNP3, Modbus TCP/RTU, IEC-104, and IEC-101 hex frames on your Android phone. Paste, decode, and analyze SCADA protocol traffic anywhere - no laptop needed.
How to Configure DNP3 Communication Between Master and Outstation
Learn how to configure DNP3 master and outstation communication step by step. Covers addressing, polling, unsolicited responses, TCP/IP setup, and security.
DNP3 Implementation Levels Explained: L1 to L4
Learn the four DNP3 implementation levels (L1–L4), including their features, capabilities, and differences from basic devices to advanced systems.
Understanding DNP3 Data Objects, Groups, and Variations in SCADA Systems
Understand DNP3 data objects, groups, and variations in SCADA systems. Learn how structured data models improve efficiency, interoperability, and real-time communication.
Top Features of DNP3 That Make It Ideal for SCADA Systems
Top features of DNP3 protocol explained for SCADA systems, including event-driven communication, time-stamping, reliability, and efficient data handling.
DNP3 Event Classes Explained: How Class 0, 1, 2, and 3 Really Work in SCADA Systems
Learn how DNP3 event classes work in practice. Understand Class 0, 1, 2, and 3, polling, delays, and how real priority is engineered in SCADA.
DNP3 Decoder Tool Online | Decode DNP3 Frames Instantly (IEEE 1815)
Use our online DNP3 decoder to analyze frames instantly. Supports multi-frame reassembly, CRC checks, Secure Authentication decoding, and detailed field breakdown.
DNP3 vs IEC 61850: Full Technical Comparison of SCADA and Digital Substation Protocols
DNP3-IP, designed for distribution SCADA and remote telemetry, and IEC 61850, built for advanced substation automation and high-speed protection schemes.
How to Monitor SCADA Protocol Traffic (Modbus RTU/TCP, IEC-104, DNP3, IEC-61850)
Learn how to monitor Modbus, IEC-104, DNP3, and IEC 61850 traffic. Capture and analyze SCADA communication over serial and TCP/IP for reliable system performance.
DNP3 Secure Authentication Version 6 (SAv6): Encryption and Authorization Explained
Learn how DNP3 Secure Authentication V6 (IEEE 1815-2020) adds AES-256-GCM encryption, AMP authorization, and LESS key management to SCADA systems.
DNP3 vs IEC 60870-5-104: Which Protocol Is Better for SCADA?
Compare DNP3 and IEC 60870-5-104 for SCADA systems—learn differences in architecture, performance, security, and use cases to choose the best protocol.
DNP3 Port Number Explained: TCP/UDP 20000, Secure Port 19999, and Firewall Configuration
Learn about the DNP3 port 20000 — its purpose, configuration, security measures, and best practices for safe SCADA communication in industrial networks.
DNP3 Report by Exception, Background Polls, and Balanced Communication
Explore DNP3’s report by exception mode, periodic background polls, and balanced communication that improve SCADA efficiency and reliability.
DNP3 System Topology Explained: Master, Multidrop, and Hierarchical
Learn about DNP3 system topologies — master–slave, multidrop, hierarchical, and multiple-master — used in SCADA communication networks.
DNP3 Message Structure Explained
Explore how DNP3 messages are structured across layers — from APDU to CRC frames — ensuring reliable and secure SCADA communication.
DNP3 Secure Authentication Version 5 (SAv5): Strengthening SCADA Communication Security
Learn how DNP3 Secure Authentication (SAv5, IEEE 1815-2012) protects SCADA systems using cryptographic challenge–response verification and message integrity checks.
DNP3 IIN (Internal Indications) Bits Meaning & SCADA Troubleshooting Guide
Learn what DNP3 IIN bits are, how they work, and how to decode internal indications in SCADA systems for reliability, event handling, and cybersecurity monitoring.