Patent ID: 9002973
Filing Date: 2015-04-07
Classification: H04L

Abstract:
1. A network device communicatively coupled to a process control system, comprising: a connection to a network included in the process control system; a publisher configured to publish data to the network of the process control system during a publishing timeslot allocated to the network device, wherein the data corresponds to a process controlled in the process control system, the data is obtained in accordance with a sample rate corresponding to the network device, and a rate of re-occurrence of the publishing timeslot is less than the sample rate corresponding to the network device; and a cache storing one or more entries, each entry of the one or more entries including a value of the data corresponding to the process and a respective timestamp, wherein the publisher is triggered to publish, to the network via the connection and during the publishing timeslot, contents of a particular entry of the cache that includes a particular timestamp corresponding to an instance in time that occurred prior to the publishing timeslot.