Chapter 4 Relay Ladder Logic Programming 61
Timer Mode 4 (OFF-Delay)
Mode 4 Timer is an OFF-Delay with reset that will time up to a fixed preset value and stop timing when the current
time is equal to the preset value. Additionally, the current time value is non-retentive and will reset to zero on a loss
of power to the smart relay. In the example below, the timer reset input is Input I1. Also in the example below, the
timer status bit T1 will turn ON only after its rung transitions from true to false. Timer status bit T1 will turn OFF
when the current time value reaches 10 seconds.
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