| 摘要 |
PURPOSE:To simplify a signal output device by forming the device to construction such that a setting signal is input as a number of pulses and its value is stored, and simplify adjusting work by detecting a position of a valve with a number of pulses. CONSTITUTION:A binary counter 10 used as a control signal input unit comprises a reset terminal 10a and a clock input terminal 10b, and its output is output to a comparator 11 as an opening and closing control unit. An up down counter 12 is provided with a reset terminal 12a to receive an input from a pulse generating mechanism 14, provided with a Hall element or the like detecting a position of a valve 13, and output to the comparator 11. A compared output 11a of the comparator rotates a motor 16 through a relay circuit 15 so as to operate the valve in the opening direction while controls a counting mode of the counter 12 to an addition mode. Reversely a compared output 11c operates the valve in the closing direction to control the counter to a subtraction mode. A compared output 11b becomes a stop signal. |
