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Physical presence verification by an industrial control system controller

  • US 9,645,566 B2
  • Filed: 11/21/2013
  • Issued: 05/09/2017
  • Est. Priority Date: 11/21/2013
  • Status: Active Grant
First Claim
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1. An industrial control system controller, comprising:

  • a mechanism configured to verify that a user of the industrial control system controller is physically present at a location of the controller;

    a memory; and

    a processor configured to execute executable instructions stored in the memory to;

    permit the user to perform safety critical industrial control operations on a plurality of physical components of an industrial control system that are to be performed using the controller only if the user is physically present at the location of the controller; and

    permit the user to perform additional non-safety critical industrial control operations on the plurality of physical components of the industrial control system that may be performed using the controller regardless of whether any user is physically present at the location of the controller at any time while the additional industrial control operations are being performed, wherein the determination of whether the industrial control operations are safety critical or non-safety critical is made by performing a fault tree analysis on the operations.

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