SCADA and ICS are not two names for the same thing. ICS (Industrial Control System) is the category. SCADA (Supervisory Control and Data Acquisition) is one type of system inside that category. Every SCADA system is an ICS. Not every ICS is a SCADA system. That’s the whole answer in three sentences. The rest of this article explains… Read More: SCADA and ICS: The Difference and How They Fit Together »
Every FTP client on this list is free. Not free trial. Not free with locked features. Free. So the question is not “which one costs nothing.” It’s “which one fits the work you do.” A tech pulling event records from relays needs a different tool than someone running nightly backup scripts. This guide sorts the clients by job,… Read More: Free FTP Clients: Which One Fits the Job You Do »
FTP is the oldest protocol you will still find running in a substation. It moves files between two machines over TCP. That is the whole job. But the way it does the job — two separate connections, plain-text commands, a server that calls you back — trips up more engineers than any other legacy protocol. This article walks… Read More: FTP Explained: How File Transfer Protocol Works »
If you have used MQTT 3.1.1 for a few years and are wondering what MQTT 5 actually changes, or if you are starting a new deployment and need to decide between the two, this is the article that gets you there directly. The two versions share the same core protocol — publish/subscribe over TCP, three QoS levels, retained… Read More: MQTT 5 vs MQTT 3.1.1: Differences, Features & Migration »
Two protocols dominate industrial Ethernet networks worldwide. Modbus TCP is the most-deployed industrial Ethernet protocol globally — running on millions of devices, embraced for its simplicity and openness. EtherNet/IP dominates the North American market and is everywhere Rockwell Automation has presence — running on the same ControlLogix PLCs that drive most US manufacturing. They both run over standard… Read More: EtherNet/IP vs Modbus TCP: Complete Comparison Guide »
Most people land here for one thing: the pin numbers. That table is right below, so grab it and go if that’s all you need. The rest of the page is for when the table isn’t enough — when a link won’t talk, a device throws garbage, or you’re wiring two pieces of gear that were never meant… Read More: RS-232 DB9 Pinout: Signal Reference, Wiring, and Field Troubleshooting »
Both protocols certify safety up to SIL3, Cat 4, PL e. Both use the Black Channel principle. Both have been deployed for nearly two decades and are used extensively across industries worldwide, with very large installed bases. On paper, CIP Safety and PROFIsafe look almost interchangeable. In practice, choosing between them is one of the most consequential decisions… Read More: CIP Safety vs PROFIsafe: An Honest Comparison of SIL3 Safety… »
You’re building a SCADA master, configuring a PLC, or bringing up an HMI — but the field devices aren’t there yet. The meters, VFDs, sensors, and I/O modules are still on order, or they’re sitting at a site you can’t reach. A Modbus simulator fills the gap. It runs on your laptop and answers as if it were… Read More: Top 10 Free Modbus Simulators »
PROFINET and EtherNet/IP are the two largest Industrial Ethernet protocols in the world. Together they account for over 60% of all new industrial Ethernet nodes installed each year. Both run on standard Ethernet hardware — same cables, same connectors, same switches. But the similarity ends at the physical layer. Above Layer 2, they use completely different protocol stacks,… Read More: PROFINET vs EtherNet/IP: Complete Comparison for Industrial Engineers »
OPC DA was the workhorse of industrial communication for over two decades. It connected PLCs to SCADA systems, HMIs to historians, and control rooms to the factory floor. It worked. But the world changed. Linux grew. Cloud computing arrived. Cybersecurity became critical. And OPC DA — locked to Windows, with no encryption, dependent on a technology Microsoft has… Read More: OPC UA vs OPC DA: The Full Comparison Every Engineer… »