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Multiplex transmission system

  • US 5,606,556 A
  • Filed: 12/29/1994
  • Issued: 02/25/1997
  • Est. Priority Date: 12/30/1993
  • Status: Expired due to Fees
First Claim
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1. A multiplex transmission system in which a plurality of communication nodes are connected to a multiplex transmission path, each of the communication nodes transmits a communication frame, in which event data of its own node is written onto the multiplex transmission path, and when a communication state is not a predetermined state, the communication frame is received by all the communication nodes,the communication node at a transmitting side comprising:

  • frame generation means for generating the communication frame including the event data;

    discrimination means for discriminating whether or not the communication state of the communication node at the transmitting side is the predetermined state; and

    format changing means for, when it is determined that the communication state is the predetermined state, changing a data format of the communication frame to write data representing that the communication frame is a data transmission request frame in an existing data area of the communication frame to be transmitted from the communication node, and to write an address of the communication node which is to receive the communication frame, and transmitting the communication frame, andthe communication node at a receiving side comprising;

    frame transmission and reception means for receiving the communication frame whose data format has been changed, and transmitting a new communication frame in which event data designated by the received communication frame is written.

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