2 System Design The screen switch flow chart is shown below. Maintenance Button ON 1.Wait Waiting Screen Button ON 6.Check 1 Headlight Status ON Open Button ON Next Screen Button ON Last Screen Button ON 2.Open Stop Button ON 7.Check 2 Upper limit LS ON Open Button ON Next Screen Button ON Last Screen Button ON 5.Full Open 4.Stop 8.Check 3 Car enter Status ON Close Button ON Close Button ON Stop Button ON Waiting Screen Button ON 3.Close Lower limit LS ON 2-10 NB-series Programmable Terminals Startup Guide Manual(V109)