#SCADA protocols
158 articles tagged with #SCADA protocols. This page is set to noindex per SEO configuration.
HSR Frame Structure — How the HSR Tag Works
The HSR tag is six bytes — EtherType, PathId, LSDU size, and sequence number. Here's what each field does and why it matters for the ring to work.
HSR Node Modes Explained: H, N, T, M, U and X (IEC 62439-3)
A clear breakdown of all six HSR node modes — what each one does, when to use it, and what breaks if you get it wrong. Based on IEC 62439-3.
PTP Clock Synchronization in PRP and HSR Networks
How PTP works across PRP and HSR networks — BMCA, Hybrid Clocks, correctionField, RedBox clock roles, and what the standards actually require.
How HSR Ring Sizing Affects Latency
Node count, forwarding delay, and frame size all affect HSR ring latency. Learn how to calculate worst-case delay and size your ring for IEC 61850 applications.
How to Connect PRP and HSR Networks | Step-by-Step Guide (IEC 62439-3)
How to connect PRP and HSR networks using RedBox and QuadBox. Five topology scenarios with step-by-step guidance, IP example, and rules from IEC 62439-3.
RedBox and QuadBox in PRP/HSR Networks
RedBox connects legacy devices to PRP and HSR networks. QuadBox links two HSR rings. Here's how both work, when to use them, and what the standard actually says.
Modbus TCP Mitsubishi iQ-R: GX Works3 Setup Guide
Modbus TCP Mitsubishi iQ-R setup in GX Works3: RJ71EN71 module parameters, MODBUS Device Assignment, float byte order, exception codes, and troubleshooting.
Modbus TCP Schneider M340: Unity Pro Setup Guide
Modbus TCP Schneider M340 configuration: CPU embedded port, NOE 0100 and NOC 0401 modules, server and client roles, READ_VAR, WRITE_VAR, and ADDM explained.
Modbus Exception Codes Explained: Complete Reference
Modbus exception codes 01 through 0B in full: Illegal Function, Illegal Data Address, Slave Device Failure, and gateway errors, each with the fix that works.
Top 10 Free Modbus Simulators
Top 10 free Modbus simulators for RTU and TCP testing — slave and master tools with setup steps, command-line examples, and download links.
Wireshark Modbus RTU: Decode Serial RS-485 Traffic
Wireshark Modbus RTU over RS-485: COM port setup with a serial adapter, DLT 147 configuration, display filters, and how to read framing and CRC errors.
PROFINET TIA Portal Configuration: Step-by-Step Guide
PROFINET TIA Portal configuration step by step: GSD install, device naming, module setup, I/O address mapping, update time, download, and online diagnostics.
Decrypt Industrial Protocol Traffic in Wireshark
Decrypt industrial protocol traffic in Wireshark using SSLKEYLOGFILE: TLS-secured Modbus TCP on 802, IEC 104 on 19998, IEC 61850 MMS, and OPC UA sessions.
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.
PROFINET vs EtherNet/IP: Complete Comparison for Industrial Engineers
PROFINET vs EtherNet/IP compared: protocol architecture, real-time performance, GSDML vs EDS, PROFIsafe vs CIP Safety, installed base, and when to choose each.
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.
Wireshark MQTT: Decode Industrial IoT Traffic
Wireshark MQTT capture and decode: display filters, CONNECT and PUBLISH packets, QoS levels, Sparkplug B payloads, TLS on 8883, and broker troubleshooting.