Patent ID: 6344802
Filing Date: 2002-02-05
Classification: G05B

Abstract:
A control system having a main controller and one or more unit controllers each of which has one or more sensors connected, comprising:select means, provided in each of the unit controllers, for selecting sensor signals produced by the sensors in sequence; comparison control means, provided in each of the unit controllers, for making a comparison between the level of a sensor signal produced by each of the sensors and a prestored threshold level and holding the result of each comparison; control means, provided in each of the unit controllers, for converting the contents of the comparison control means into a serial signal and transmitting the serial signal to the main controller; recognition means, provided in the main controller, for recognizing the results of comparisons sent in serial form from each of the unit controllers; and slice level change means, controlled by said main controller, for changing the level stored in said comparison control means.