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Method and a device for communication among equal-access stations of a ring-shaped serial fiber-optic bus

  • US 7,009,995 B1
  • Filed: 01/18/1999
  • Issued: 03/07/2006
  • Est. Priority Date: 01/30/1998
  • Status: Expired due to Fees
First Claim
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1. A method for communication among equal-access stations of a ring-shaped, serial fiber-optic bus, comprising:

  • during one bus cycle, a predetermined one of the stations generating strictly time-cyclical container messages, addressing the container messages, and supplying the container messages to the bus, the predetermined one of the stations supplying a synchronization message to the bus as an end message of the bus cycle;

    each one of the stations writing respective data in the container messages addressed to the one of the stations;

    each one of the stations reading data of written-in container messages on the serial bus as a function of a read authorization of the one of the stations;

    each one of the stations communicating only with the bus, due to source addressing of the written respective data and each one of the stations having direct-access read authorization of the respective data written by each one of the stations;

    each one of the stations reading the synchronization message and generating a respective interrupt as a function of the synchronization message, wherein depending on a respective position of each one of the stations, the respective interrupt being time delayed so that all of the respective interrupts are output in a time-synchronous manner; and

    further processing the read data when the respective interrupts are output.

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