Rain Hold Time  is a parameter that lets you choose how long you want the rain override condition to persist after the rain status goes from Yes to No. This is to keep intermittent rain from causing the vents to keep opening and closing.

Cmd Delay  (Command Delay) is the time between commands to change the equipment's’ states. It is the shortest time permitted for switching equipment. Typical update times are from 1 to 2 minutes. This parameter is used to minimize the cycling of the equipment.

Irr Mode (Irrigation Mode) is either Concurrent or Sequential. You can choose between the two options by pressing the + or - key. These options apply if you program more than one irrigation valve to trigger based on accumulated light or a dry contact switch closure, or if you select the cycling (misting) option. If you select Concurrent, then the valves will turn on immediately when requested regardless of how many are already on. If you select Sequential, then the first one will turn on but if other valves are to come on, they will wait in line and each one will come on in succession. (Also see the Jumper section to make sure your settings are correct).

Irr Delay (Irrigation Delay) forces a user definable delay between the valves. In other words, when the current On valve goes Off, the next valve in the queue will wait the selected min and sec before it turns On.

Start Delay This is the time duration upon a power startup before the first equipment can turn on. This is important when you have multiple controllers in the event of a power outage. Each controller should be set with a different start delay.