#SCADA protocols
158 articles tagged with #SCADA protocols. This page is set to noindex per SEO configuration.
Modbus Client-Server vs Master-Slave Terminology
Modbus client-server vs master-slave: the 2020 terminology change explained. What stays the same, translation table, and how to read mixed-terminology docs.
Modbus TCP MBAP Header Explained: 7 Bytes Byte by Byte
Modbus TCP MBAP header decoded byte by byte: Transaction ID, Protocol ID, Length, and Unit ID, with a real hex dump, network byte order, and common mistakes.
Modbus TCP Security Explained: TLS on Port 802
Modbus TCP Security explained: TLS on port 802, X.509 certificates, role-based access control, deployment alongside port 502, cipher suites, real setup.
Modbus Byte Order and Word Order: Fix Your 32-Bit Values
Modbus byte order and word order decoded: ABCD, CDAB, BADC, and DCBA. Fix reversed floats and byte-swapped longs, with a five-minute test and vendor defaults.
Allen-Bradley EtherNet/IP: CIP Configuration Guide
Allen-Bradley EtherNet/IP setup on ControlLogix and CompactLogix: implicit vs explicit messaging, Generic Ethernet Module, MSG instructions, and fault codes.
Free FTP Clients: Which One Fits the Job You Do
FileZilla, WinSCP, curl, lftp, Cyberduck — all free. Which FTP client fits your job, which support SFTP, and which to use for scripts and field work.
FTP Explained: How File Transfer Protocol Works
How FTP really works: the two-connection model, active vs passive mode, commands, reply codes, and why FTP fails security audits. Plus FTP vs FTPS vs SFTP.
MQTT 5 vs MQTT 3.1.1: Differences, Features & Migration
MQTT 5 vs MQTT 3.1.1 compared: every difference, every new feature, behavioral changes, packet-level changes, and how to decide which version to use.
CIP Device Profiles Guide: Interoperability Framework
CIP device profiles explained: how Device Type codes define interoperability. Complete profile catalog (AC Drive 0x02, Discrete I/O 0x07, Encoder 0x22, more).
CIP Motion Explained (Class 0x42 Motion Axis Object)
CIP Motion explained: distributed motion control over EtherNet/IP. Motion Axis Object (Class 0x42), control modes, CIP Sync dependency, servo drive integration.
CIP Sync Explained: IEEE 1588 PTP for Industrial Networks
CIP Sync explained: IEEE 1588 PTP for CIP networks. Time Sync Object (Class 0x43), grandmaster/boundary clocks, Best Master Clock Algorithm, offset clock model.
Modbus TCP S7-1500: MB_CLIENT and MB_SERVER Setup
Modbus TCP S7-1500 setup in TIA Portal: MB_CLIENT, MB_SERVER, and TCON_IP_v4 configured, MB_MODE mapped to function codes, and status codes 8200 and 809B fixed.
EDS Files Explained: How EtherNet/IP Devices Describe Themselves
Complete guide to CIP EDS files: structure, sections, [File], [Device], [Params], [Assembly], [Connection Manager], importing, and troubleshooting.
PROFINET vs EtherCAT: An Honest Comparison for Real Projects
PROFINET vs EtherCAT compared without the marketing: wire-level differences, cycle times, topology, real cost, ecosystem, and when each is the right call.
S7comm Protocol Explained: How Siemens S7 PLCs Communicate
S7comm protocol explained: how S7-300, S7-400, S7-1200, and S7-1500 talk over TCP port 102, the PDU header, ROSCTR message types, and S7comm vs S7CommPlus.
Process Bus vs Station Bus: IEC 61850 Architecture
Process bus vs station bus in IEC 61850: which protocols run on each, time sync and hardware differences, redundancy, bandwidth, and procurement guidance.
PTP Power Profile Explained (IEC/IEEE 61850-9-3)
PTP Power Profile explained: the 1 microsecond budget, grandmaster and transparent clock requirements, holdover, PRP and HSR integration, and link rules.
What Is a Merging Unit? IEC 61850 Process Bus Explained
Merging unit explained: how it digitizes CT and VT signals and publishes Sampled Values, with TCTR and TVTR modeling, SAMU vs built-in, and sample rates.