| 摘要 |
PURPOSE:To prevent a fault of an output system by allowing an operating circuit to output a control signal defined from the state of an input signal, latching a D-FF after a predetermined time corresponding to the control signal and controlling a load. CONSTITUTION:Many kinds of input signals are applied to a logical operating circuit 1 in a combustion controller for a hot water supply device, the load state is defined corresponding to the input state and a control signal is inputted to the D-FF6 according to the definition. When a control signal is outputted in response instantaneously to the change in the input signal depending on the kinds of the control signal such as a combustion stop command, a control signal defined from the state of the input signal from the circuit 1 is outputted to the D-FF6, a timer 5 gives instantly a latch signal to the D-FF6 accordingly and the control signal to the load is changed. When it is necessary to output the control signal to the load at a prescribed time after the input signal is chanbed, the corresponding time output is generated from the timer 5. |
