This is a feature of the SmartLine controller called SLW Delay that extends the “dry out” period for an additional number of hours. The SLW Delay under the Advanced menu allows the user to adjust the factory set 48-hour watering delay that will occur after a rain event shutdown if you are using an SLW Weather Station for SMART Watering.
Note: The SLW DLY begins after the SLW rain sensor has reset (is dry) following a rain event. Accumulation of new water deficits will not begin until after the SLW Delay has cleared.