WATERING MULTIPLE TIMES IN A GIVEN DAY IS NOT ALLOWED.
Watering full cycles multiple times in a given day encourages a shallow root system, which makes your lawn much less drought-tolerant, and is unnecessary. If you leave footprints on the grass, it is usually time to water; however, it is very easy to test your soil moisture with a soil probe or screwdriver before you water. If the soil is moist, DON'T WATER!
However, the "cycle & soak" method is allowed - set each zone for 1/2 the time needed, run all the zones, then run each station a second time during the same watering cycle to minimize water runoff. This does NOT mean you can water the first half in the morning and the second half in the evening or on consecutive days - as a general rule, 30-60 minutes is all you need to wait between cycles. Cycle
& soak not only eliminates runoff, it provides more water to the roots. The
first cycle will break the surface tension of the soil and allow the water to
penetrate. The second cycle is absorbed even further into the soil, reaching
the roots. This method works well on sloped areas or in clay soil.