Delayed disclosure in process control systems

摘要

A technique for delaying the release of data to a network by a device in a process control system or plant includes acquiring data to be released to the network in the device, and storing the acquired data and a corresponding time stamp in a cache; Triggering the publication of cache data and publishing the oldest cache data to the network based on the trigger during the publication time slot assigned to the device. The cache data can correspond to the sample rate of the device and can include multiple instances of data acquired over time. The device includes a network interface, cache, and publisher and operates in delayed publishing mode, or in immediate mode where currently acquired but uncached data is published to the network during the publishing time slot assigned to the device. Can be configured to operate. [Selection] Figure 5