SCADA vs HMI vs PLC
SCADA, HMI, and PLC get used almost interchangeably in job postings and casual shop-floor conversation, but they aren't competing technologies, they're three different layers of the same control system, each doing a distinct job.
Category Industrial Automation
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How to Wire a Photoelectric Sensor to an AC Timer Relay
Learn how to connect a 24V DC photoelectric sensor to an AC timer relay using an interposing relay. Complete wiring guide with diagrams, explanations, and troubleshooting.
Proximity Sensors Explained: Inductive vs Capacitive vs Photoelectric
Inductive, capacitive, and photoelectric sensors all answer the same basic question, is something there?, but they sense completely different physical properties, and picking the wrong type is one of the most common causes of unreliable machine behavior on the plant floor.
Modbus Register Types Explained: Coils, Discrete Inputs, Holding Registers
Modbus register types explained: coils, discrete inputs, holding and input registers, function codes, and addressing conventions.
How to Set Up a Modbus TCP Connection Between a PLC and SCADA
Step-by-step guide to connecting a PLC to SCADA over Modbus TCP, including port 502 setup and a troubleshooting table.
Understanding Variable Frequency Drives for Efficient Motor Control
Learn how Variable Frequency Drives (VFDs) operate, configure speed and torque settings, troubleshoot common issues, and apply them to real-world applications. This detailed guide covers everything you need to optimize motor performance for energy efficiency and reliability in industrial settings.…