| 摘要 |
PURPOSE:To select an operating object from an optional operating place, and also to execute automatically a selective reset by providing a reserving means on every operating place, and resetting it automatically after a prescribed time elapses. CONSTITUTION:Reservation buttons 1A-3A, reset buttons 1B-3B and start buttons 1D-3D are provided on an operation panel of three crane operating places NO1-NO3. When the reservation button 1A is pushed, a relay X1 is energized, and the operation place of NO1 is selected. In this case, when the reservation button 1A is operated by mistake, the reservation is reset by pushing the reset button 1B. Also, if the start button is not pushed in a state that the reservation button remains pushed, the reservation is reset automatically after a prescribed time. Also, when the reservation is being executed, a reservation by operating other reservation button is inhibited. In this way, an operating object can be selected from an optional operating place, and also a selective reset can be executed automatically. |
