where it states 000, put the time in minutes, after the feed is over for your pump to continue to be off. This is good for skimmers that need the water level to be a certain height before they are used.
The Fallback directive is In case of a power outage or an alarm trigger that turns off the outlet. When the power is restored or the alarm condition is cleared if fallback is set to on, the outlet will go back on. If it is set to off it will remain off. I put my pumps on and my lights off.