| 摘要 |
PURPOSE:To prevent system faults caused by erroneous operations, by providing a gate circuit and an operation panel preference switch for transmission of the operation controlling signal from a switch to a computer system. CONSTITUTION:Data (1) is inputted to a CPU2 and is inputted as information (2) to a register 3. When an operation panel preference switch 4 is depressed to input a signal (3) to the register 3, the register 3 outputs its value to a comparator 5 and outputs it to an AND gate 6. When a switch 7 is depressed, an execution signal (4) is inputted to an ANd gate 5, and therefore, a stop signal (6) is not transmitted from a J-K flip-flop 8 even if a start/stop switch 1 is depressed to transmit a turn-off signal (5) before the depression of the switch 7; but when the switch 1 is closed by the operation of a stop push button, the generated turn-off signa (5) is applied to the J-K flip-flop 8, and the stop signal (6) is generated to execute the stop operation. |
