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.
OPC UA NodeId Explained: Namespace Index, Identifier Types, and Format
Complete guide to OPC UA NodeId. Covers namespace index, four identifier types (Numeric, String, GUID, Opaque), notation, well-known NodeIds, and best practices.
OPC UA Port Number Explained: TCP 4840, Discovery, and Firewall Configuration
Complete guide to OPC UA port 4840. Covers IANA registration, endpoint URL format, Local Discovery Server, firewall rules, Wireshark filters, and security.
OPC UA Pub/Sub: Complete Technical Guide for Engineers
OPC UA Pub/Sub explained — classic subscriptions, Part 14 broker model, MQTT/AMQP transport, UADP encoding, TSN integration, and Client/Server vs Pub/Sub.
OPC UA Client-Server Architecture Explained: Sessions, Services, and Subscriptions
How the OPC UA client-server architecture works: discovery, Secure Channels, sessions, subscriptions, service sets, and real-world deployment patterns.
OPC UA Companion Specifications Explained: 60+ Industry Standards in One Guide
What are OPC UA companion specifications? Explore 60+ standardized data models for robotics, packaging, machine tools, and more. Practical guide included.
What Is OPC UA? A Complete Beginner's Guide
What is OPC UA? Learn how this industrial communication standard works, why it matters for Industry 4.0, and how to get started. A plain language guide.
OPC UA Information Model Explained: Types, Nodes, References, and Design Guide
How the OPC UA information model works. Learn nodes, types, references, namespaces, and how to design your own model. Practical guide with real examples.
OPC UA Security: How It Works and Best Practices
How does OPC UA security work? Learn the three-layer architecture, certificate management, security policies, and 12 best practices for industrial systems.
OPC UA Services Explained: The Complete Guide to All 10 Service Sets
All 10 OPC UA service sets explained: Discovery, SecureChannel, Session, Browse, Read, Write, Subscribe, and more. Every service with real-world examples.
OPC UA Address Space and Information Modeling Explained
Learn how the OPC UA address space works. Understand nodes, references, types, namespaces, and information modeling with practical examples and tips.
OPC UA Architecture Explained: Complete IEC 62541 Architecture Guide
Learn how OPC UA architecture works based on the IEC 62541 standard. Explore layers, services, address space, communication stack, and security in industrial automation systems.
What Is OPC UA Protocol? Architecture, Security, Address Space and IEC 62541 Guide
Learn the OPC UA protocol (IEC 62541) including architecture, security model, address space, services, data access, alarms, and industrial applications in SCADA and IIoT.