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plc basics

2 articles tagged “plc basics”.

Flat vector infographic of the PLC scan cycle showing four phases arranged in a circle: input scan, program execution, output scan, and housekeeping with connecting arrows
plc scan cycleplc basicsladder logic

How the PLC Scan Cycle Works: Step by Step

The PLC scan cycle is the heartbeat of every control system. Learn exactly what happens during input scan, program execution, and output scan, with real numbers and field gotchas.

Jul 29, 2026 · 10 min read

Flat vector diagram of a PLC controller rack showing CPU, I/O modules, power supply, and connections to sensors and actuators representing a complete PLC system
plc basicsplc programmingwhat is a plc

What Is a PLC Controller and How Does It Work?

Learn what a PLC controller is, how it executes logic in a repeating scan cycle, and how inputs, outputs, and memory work together to control real machines.

Jul 29, 2026 · 8 min read

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