This mode is often used for plant propagation or with misting. In this equipment type, the irrigation valve is cycled continuously during the time window that you have selected.

The cycling option is for turning a valve on and off at some repetition rate during a time window. As with the other options, your first entry is the OnTime for the valve. The second entry is the Period or cycle time. Note that the On time could be in seconds, but the minimum cycle or period is 1 minute. See figure below;