| 摘要 |
PURPOSE:To facilitate maintenance and to improve economical efficiency, by a method wherein a subcontroller to process an input signal from an input control part is connected to a main controller to receive the input signal and control an electric hydraulic converting part through serial communication. CONSTITUTION:A signal from an input control part 1 is received by a subcontroller 4A to process the input signal. A subcontroller 4A is coupled to a main controller 4B through bidirectional serial communication 8, and inputs signal from a machine body sensor 2 and a console 3. Given computation and logic decision are effected to an electric hydraulic converting part, e.g., a control valve 5, a pump 6, a running motor 7. This constitution eliminates the use of an expansive microcomputer, enables standardization of the subcontroller 4A, and permits local limitation of an influence exercised on a whole during failure in operation. |
