What is the time base used by PLCs?

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Enhance your skills with the PMMI Programmable Logic Controllers (PLC) 1 Test. Dive into multiple-choice questions with detailed explanations. Prepare effectively for your certification!

Multiple Choice

What is the time base used by PLCs?

Explanation:
Timing in PLCs hinges on a fixed smallest step, the time base, which is millisecond-scale. Most PLC timers count in discrete ticks of 1 millisecond, so you set delays and durations using milliseconds (0.001 s). For example, a 2-second delay is programmed as 2000 milliseconds. Minutes or hours aren’t the base timing unit; they are just longer durations expressed in milliseconds. This millisecond time base lets timers and pulse logic operate with fine, predictable granularity.

Timing in PLCs hinges on a fixed smallest step, the time base, which is millisecond-scale. Most PLC timers count in discrete ticks of 1 millisecond, so you set delays and durations using milliseconds (0.001 s). For example, a 2-second delay is programmed as 2000 milliseconds. Minutes or hours aren’t the base timing unit; they are just longer durations expressed in milliseconds. This millisecond time base lets timers and pulse logic operate with fine, predictable granularity.

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