OPERATOR'S STATION Menu Key Shifts the basic screen to the menu screen. M1U1-01-042 Optional Function Key The desired preset optional function can be selected by oper- ating these keys even though the menu key is not operated. F1 : Work Mode Selection F2 : Auxiliary F3 : Mail (Optional) F4 : Auxiliary are the fixed function keys. M1U1-01-043 Return to Basic Screen Key Allows any screen to return to the basic screen. M1U1-01-044 Alarm Light Comes ON when any abnormalty occurs. Optional Function Display Displays the optional functions preset by the optional function key. F1 : Work Mode Selection F2 : Auxiliary F3 : Mail (Optional) F4 : Auxiliary M1U1-01-045 M1U1-01-114 1-10