| 摘要 |
PURPOSE:To improve reliability on a control circuit, by a method wherein an A/D converter and a D/A converter are used to both two circuits of a manual and an automatic circuit, and an output signal from a microcomputer is inputted to the ROM of a manual control circuit. CONSTITUTION:A detector PM is provided for outputting an analogue signal through detection of a control amount of a control tool, and an electromagnetic control circuit 2 is provided form selectively controlling an electromagnetic valve 1 for an actuator in response to an output signal from the detector. A manual control circuit 6, formed with an A/D converter 3, converting an analogue signal from the detector PM into a digital signal, a ROM4, and a D/A converter 5, is located in a control circuit 2. Further, a microcomputer 8 is provided for inputting a control signal for an automatic work to a ROM4 in response to an output signal from the A/D converter 3. This enables provision of a control part which is inexpensive to manufacture, decreased in the number of parts, and is easy to regulate. |
