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Communication system for a control system over ethernet and IP networks

  • US 20020194365A1
  • Filed: 04/10/2002
  • Published: 12/19/2002
  • Est. Priority Date: 03/16/1998
  • Status: Active Grant
First Claim
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1. A method of communicating within a connectionless network having a plurality of devices operably connected via Ethernet, the method comprising the steps of:

  • publishing a data frame via user datagram protocol (UDP) and internet protocol (IP), the data frame being published by the publisher device;

    associating a refreshment status with the published data frame, the refreshment status corresponding to the time of publication of the data frame onto the network;

    receiving the published data frame, the data frame being received by the subscriber device; and

    , providing a promptness status responsive to the subscriber device, the promptness status being associated with the received data frame and indicative of the time of receipt of the published data wherein the subscriber device being capable of determining the duration of the published data frame.

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