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PLC Scan Time and Cycle Time: Measure It, Then Cut It

September 12, 2026January 19, 2024 by PLC

Timing chart of two 10 ms periodic task cycles showing input image update, program scan, output image update and comms overhead in sequence

Read real scan times with GSV on a ControlLogix and the cycle time view on an S7-1500, then find what is eating them before the watchdog does.

Categories Articles, Rockwell Studio 5000 Tags ControlLogix, periodic task, s7-1500, Scan Time, watchdog

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