What Is Modbus? Protocol Basics for Industrial Networks
Modbus is a serial communication protocol that connects a master device — usually a PLC, an HMI, or a SCADA system — to slave devices s...
Inductive vs Capacitive Proximity Sensor: Selection by Target Material
An inductive proximity sensor detects metal only; a capacitive proximity sensor detects both metal and non-metal targets, including pla...
What Is a Human Machine Interface? Types and Plant Applications
A Human Machine Interface (HMI) is the screen or panel that lets a plant operator see and control what a machine is doing — the touchsc...
Allen-Bradley PLC Guide: Micro800, CompactLogix and ControlLogix
Allen-Bradley PLC hardware is the programmable logic controller range that Rockwell Automation sells under the Allen-Bradley brand, spl...
What Is a Load Cell? Industrial Weighing Fundamentals
A load cell is the sensing component that turns a physical force — weight, tension, or compression — into an electrical signal a contro...
How a VFD Works: Rectifier, DC Bus, IGBT Inverter Stage
A VFD inverter converts fixed-frequency AC mains power into variable-frequency AC power through three internal stages: a rectifier, a D...
Ultrasonic Sensors in Industry: Level, Distance and Presence Detection
An ultrasonic sensor detects and measures distance to an object by emitting a high-frequency sound pulse and measuring how long the ech...
Siemens PLC Guide: LOGO!, S7-1200 and S7-1500 Compared
Siemens PLC hardware spans three tiers under the SIMATIC brand: LOGO! logic modules for simple automation, the S7-1200 compact controll...
Servo Motor Types and Working Principle: AC, DC, Linear
A servo motor is a rotary or linear actuator that uses closed-loop position feedback to control angular or linear position, velocity, a...
What Is SCADA? Architecture, RTU, and Where It Fits in a Plant
SCADA (Supervisory Control and Data Acquisition) is a control system architecture — combined software and hardware — that lets engineer...