What is the completion of one PLC operating cycle commonly called?

Study for the Programmable Logic Controller (PLC) Test. Prepare with flashcards and multiple choice questions, each question provides hints and explanations. Get ready for your exam!

Multiple Choice

What is the completion of one PLC operating cycle commonly called?

Explanation:
In PLCs, one complete pass through reading inputs, executing the program, and updating outputs is called a scan. This term reflects how the CPU “scans” through all I/O and logic in a single iteration, then starts the next pass. The duration of a scan is the scan time, and it repeats continuously as the machine runs. Tick is just a timing tick, not a full processing pass; Cycle is a generic word that could refer to any loop, and Refresh is not used for the PLC I/O processing sequence.

In PLCs, one complete pass through reading inputs, executing the program, and updating outputs is called a scan. This term reflects how the CPU “scans” through all I/O and logic in a single iteration, then starts the next pass. The duration of a scan is the scan time, and it repeats continuously as the machine runs. Tick is just a timing tick, not a full processing pass; Cycle is a generic word that could refer to any loop, and Refresh is not used for the PLC I/O processing sequence.

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