2 System Design (5) FULLY OPEN The screen will be displayed when the garage door is fully opened. There is a button for keeping the garage door open. 2-2 Demonstration System 2 (6) CHECK 1 This screen is used for maintenance by displaying the input states of the sensors. The screen will be displayed when the maintenance button on [1 WAIT] screen is pressed. (7) CHECK 2 This maintenance screen can check the operation through displaying the input states of Function Keys. (8) CHECK 3 The current values of the timer and counter (used for counting flash times of headlights)are displayed on this screen which is used for maintenance. NB-series Programmable Terminals Startup Guide Manual(V109) 2-9