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.
Modbus TCP CompactLogix Setup in Studio 5000
Modbus TCP CompactLogix setup with Rockwell's free AOI in Studio 5000: client and server roles, AOI parameters, polling multiple devices, and gateway options.
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.
Wireshark Modbus TCP: Capture, Filter, Troubleshoot
Wireshark Modbus TCP analysis end to end: display filters, MBAP header decoding, exception responses, timeouts, and what each failure looks like on the wire.
Modbus Register Map Explained: How to Read Any Device
Modbus register map reading made reliable: the four register types, the zero-based offset trap, data types inside registers, byte order, and scale factors.
Modbus TCP S7-1200: TIA Portal Step-by-Step Guide
Modbus TCP S7-1200 configuration in TIA Portal: MB_SERVER and MB_CLIENT setup, holding register mapping, connection parameters, and reading multiple devices.
Modbus Function Codes Explained with Real Examples
Modbus function codes with real hex frames: FC 01 to 06, FC 15 and 16, FC 23 and 43, plus register type matching and the mistakes that cause exceptions.
Modbus Security Risks and How to Protect Your Network
Modbus security risks in practice: why the protocol has no authentication, real attack techniques on RTU and TCP, plus segmentation, firewalls, and monitoring.
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.
How to Configure Modbus RTU Over RS-485: Step-by-Step
Modbus RTU over RS-485 configured step by step: bus wiring and topology, termination and biasing, addressing, register types, and T1.5 and T3.5 timing.
Modbus TCP/IP Setup: Step-by-Step Configuration Guide
Modbus TCP/IP setup from scratch: IP planning, server and client configuration, MBAP header basics, gateway bridging to RTU, and connection troubleshooting.
Coding Modbus TCP/IP for Arduino: A Complete Technical Guide
Complete guide to coding Modbus TCP/IP on Arduino. Learn protocol structure, implement client/server, practical examples, troubleshooting. Perfect for industrial automation projects.
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.
Modbus Troubleshooting in SCADA — 15 Real Field Problems Engineers Face
Practical Modbus troubleshooting guide for SCADA engineers. Learn 15 real field problems, exception errors, RS-485 issues, and proven solutions to fix communication fast.
WireGuard vs OpenVPN for SCADA Systems: Key Differences
Compare WireGuard vs OpenVPN for SCADA systems, including DNP3 and IEC-104 behavior, latency, reliability, and secure UDP vs TCP design.
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.
Modbus Data Types: Decode Register Values Correctly
Modbus data types explained: UINT16, INT16, hex, binary, ASCII, 32-bit integers, IEEE-754 floats, and bitmasks, plus how to pick the right format every time.