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plc programming basics

3 articles tagged “plc programming basics”.

Flat vector diagram showing a PLC programmer interview checklist alongside a PLC rack and ladder logic rung symbol
plc programmer interviewplc interview questionsplc programming basics

PLC Programmer Interview Questions: Real Answers

Preparing for a PLC programmer interview? These 30 real questions cover scan cycle, memory, I/O, timers, counters, comms and more, with answers that go beyond textbook definitions.

Aug 6, 2026 · 15 min read

Flat vector diagram comparing PLC direct addressing, indirect addressing with an array index pointer, and symbolic tag addressing across three memory layout panels
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PLC Addressing Modes: Direct, Indirect and Symbolic

Direct, indirect and symbolic addressing each work differently inside a PLC. This guide breaks down how each mode works, when to use it, and the gotchas that catch engineers off guard.

Jul 30, 2026 · 9 min read

Flat vector diagram of a ladder logic rung showing XIC and XIO contacts connected to an OTE output coil with a TON timer block, representing ladder logic interview questions
ladder logicplc interviewplc programming basics

Ladder Logic Interview Questions: Real Answers

Preparing for a PLC role? These ladder logic interview questions cover contacts, coils, timers, counters, latching, scan cycle, and common gotchas interviewers love to probe.

Jul 16, 2026 · 13 min read

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