What is PLC programming?

PLC (Programmable Logic Controller) programming writes logic for industrial controllers that automate factories, utilities, and machinery — replacing hard-wired relay panels with flexible software.

Exam tip: keep SI units consistent end-to-end, write the governing relation symbolically before substituting, and sanity-check magnitude and sign.

Understand the concept

PLCs read inputs (sensors, switches), execute scanned logic cycles, and drive outputs (motors, valves, lights). Languages include ladder diagram, structured text, and function block per IEC 61131-3.

Career path

Automation engineers, controls technicians, and maintenance teams work with vendors like Siemens, Allen-Bradley, and Schneider. Safety interlocks and documentation are as important as the code itself.

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See real electrical & electronics careers

After exams and interviews, see how engineers actually built careers — milestones and decisions from people in the field.

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