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System and method applicable to vehicles for communicating between data processing stations

  • US 5,077,670 A
  • Filed: 12/21/1989
  • Issued: 12/31/1991
  • Est. Priority Date: 12/28/1988
  • Status: Expired due to Term
First Claim
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1. A communication system, comprising:

  • a) a plurality of subordinate data processing stations;

    b) a master data processing station; and

    c) a communication circuit interconnected between the master station and the plurality of subordinate stations, the master data processing station transmitting a command and at least two information signals related to said command to any selected one of the subordinate data processing stations via the communication circuit,a selected subordinate data processing station, when in communication with the master station, transmitting a first echoback signal to the master station to inform the master station of the receipt of said command and transmitting a second and third echoback signals to the master station to inform the master station of the receipt of said command and said first and second information signals;

    first means for determining the bit contents of said command and said two information signals, and second means for establishing the bit contents of said first echoback signal being logically opposite to the bit contents of said command when the bit contents of said second and third echoback signals are respectively identical to the bit contents of said two information signals.

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