Time-stamping and synchronization for single-wire safety communication

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United States of America Patent

PATENT NO 9891142
APP PUB NO 20160146710A1
SERIAL NO

14550833

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Abstract

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A time-stamping layer is provided for time-stamping of events detected in an industrial safety system. The technique implemented by the time-stamping layer uses autonomous device counters and simple arithmetic to label detected events (e.g., safety switching events) with accurate time-stamps without the need to synchronize clocks of the individual safety input devices and safety relay on the safety circuit. In some embodiments, the time-stamping technique is implemented in a single-wire safety system architecture that yields reliable safety device monitoring without the need for dual redundant signal channels.

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Patent Owner(s)

  • ROCKWELL AUTOMATION TECHNOLOGIES, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nair, Suresh R Amherst, US 29 495

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