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Presenting field users on process graphics

  • US 9,690,285 B2
  • Filed: 02/27/2013
  • Issued: 06/27/2017
  • Est. Priority Date: 02/27/2013
  • Status: Active Grant
First Claim
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1. A method of enabling an operator of a process control system to determine the location of field users in the process control system, the method being performed by a field user presenting arrangement and comprising the steps of:

  • obtaining position data of the position of a field user in the form of a maintenance engineer;

    obtaining the positions of objects in the process control system;

    comparing the position of the maintenance engineer with the positions of the objects;

    determining that the maintenance engineer is in the vicinity of an object if the distance between the position of the maintenance engineer and the position of the object is below a proximity threshold;

    presenting the maintenance engineer on graphics depicting the process, where a maintenance engineer deemed to be in the vicinity of an object is presented at this object in the graphics;

    receiving an indication that the maintenance engineer is in control of the object, wherein the process control system is in a first state at least in a section of the system in which said object being controlled by the maintenance engineer is provided, said first state being a safety state where the process is shut down completely or partly or running in a safety mode;

    indicating this control in the presenting of the maintenance engineer on the graphics;

    comparing, after the indication of control has been received, the distance between the controlled object and the maintenance engineer with a release threshold;

    determining that the maintenance engineer has released the object based on the threshold being exceeded;

    presenting the changed status of the object; and

    instructing the process control system to change system state based on the determination of the release of the object.

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