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Control method for a collective wiring system

  • US 4,969,082 A
  • Filed: 06/28/1989
  • Issued: 11/06/1990
  • Est. Priority Date: 02/23/1985
  • Status: Expired due to Term
First Claim
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1. A method of control of vehicle accessory devices using a collective wiring system for an automobile in which data is transmitted via a series data transmission system between a plurality of vehicle input terminals, connected to input devices, and a plurality of vehicle output terminals, connected to said vehicle accessory devices, under control of a central control unit of a stored control program and having a memory for storing data, comprising the steps performed by said central control unit of:

  • (a) storing in memory a scan table of addresses of all of said vehicle input terminals and said vehicle output terminals in a predetermined order in which said terminals are to be periodically accessed;

    (b) periodically checking the operation status of each of said input devices connected to said vehicle input terminals in accordance with the order of addresses provided in said scan table;

    (c) storing in memory the result of said checking of the operation status of said input devices in the form of a status table;

    (d) storing in memory a desired control condition of each of said vehicle accessory devices in the form of a control table;

    (e) updating the control condition information for said vehicle accessory devices in said control table under control of said stored control program on the basis of said operation status of said input devices in said status table using connection information indicating a relationship between said vehicle input terminals and said vehicle output terminals; and

    (f) sending control command signals from said central control unit via said series data transmission system to said vehicle output terminals in accordance with said stored control program and the order of addresses in said scan table to control the operating condition of said vehicle accessory devices on the basis of said control condition information in said control table.

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