| 摘要 |
PURPOSE:To shorten a control signal sent out to plural controllers at one time by composing its voltage in a combination of binary values. CONSTITUTION:Plural controllers 2 through 5 are controlled by the use of a control signal from a master controller 1. The voltage of the control signal sent out via a signal line (a) from the master controller 1 is composed in a combination of binary values. One of the binary values serves as a reference value, while there are formed a level and a voltage waveform corresponding to the arrangement order of a controller to be controlled before the other value is sent out. In the controllers 2 through 5, unless the amplitude in the voltage waveform of the signal inputted therein reaches a fixed level, its amplitude is enlarged by a fixed value so that the signal is sent out to a next-step controller. Meanwhile, if the amplitude in the voltage waveform of the inputted signal exceeds the fixed level, a solenoid valve belonging to the controller is controlled.
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