Fitzpatrick, Cella, Harper & Scinto
Communication system for detecting a communication error in information transmitted between a plurality of units and a main control unit
 A communication system includes a main control unit controlling a plurality of units, a transmitter for transmitting information between the main control unit and the plurality of units, and an error detector. The error detector can include a modulator and demodulator for modulating or demodulating the transmitted information on the basis of a predetermined rule. The error detector detects a communication error in the transmitted information in accordance with the predetermined rule. Alternatively, the error detector can include a transmitted data creator/analyzer for creating data based on the transmitted information in a state in which the information contains positive data and negative data of the same bit in one frame and analyzes data when the data is received. This error detector detects a communication error in the transmitted information on the basis of the comparison between the positive and negative data. The error detector can also include a space bit addition separator for creating data based on the transmitted information in a state in which a predetermined space bit is added in one frame and separates the space bit when the data is received. This error detector detects a communication error in the transmitted information on the basis of the timing at which the space bit and other bits appear. 
Canon Kabushiki Kaisha
H
H04Q
inventional
Yoji Akio Makoto Yukihide Shimpei Kazuro Seiji
Serizawa Noguchi Takeuchi Ushio Matsuo Yamada Uchiyama