Economic calculations in a process control system

• US 8,417,595 B2
• Filed: 05/13/2010
• Issued: 04/09/2013
• Est. Priority Date: 03/01/2001
• Status: Active Grant

• Current Assignee: Fisher-Rosemount Systems Incorporated (Emerson Electric Company)
• Original Assignee: Fisher-Rosemount Systems Incorporated (Emerson Electric Company)
• Inventors: Keyes, Marion A., Nixon, Mark J., Blevins, Terrence Lynn
• Primary Examiner(s): ADE, OGER GARCIA
• Application Number:
  US12/779,642
• Publication Number:
  US 20100293019A1
• Time in Patent Office: 1,062 Days
• Field of Search: 705/30
• US Class Current: 705/30
• CPC Class Codes: G05B 13/042 in which a parameter or coefficient is automatically adjusted to optimise the performance
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: G06Q 10/063 Operations research, analysis or management
• CPC Class Codes: G06Q 30/0201 Market modelling; Market analysis; Collecting market data
• CPC Class Codes: G06Q 30/0283 Price estimation or determination
• CPC Class Codes: G06Q 40/12 Accounting
• CPC Class Codes: Y02P 90/80 Management or planning

Abstract

A process control system includes economic models disposed in communication with process control modules, as well as with sources of economic data such as cost, throughput and profit data, and uses the economic models to determine useful economic parameters or information associated with the actual operation of the process plant at the time the plant is operating. The economic models can be used to provide financial statistics such as profitability, cost of manufactured product, etc. in real time based on the actual current operating state of the process and the business data associated with the finished product, raw materials, etc. These financial statistics can be used to drive alarms and alerts within the process network and be used as inputs to process plant optimizers, etc. to provide for better or more optimal control of the process and to provide a better understanding of the conditions which lead to maximum profitability of the plant.

Claims

1. A system for use in a process plant having a controller coupled to a plurality of field devices, comprising:

a data source device including economic data related to the operation of the process plant;

a diagnostic application stored on a first electronic device and communicatively connected to the controller, wherein the diagnostic application is adapted to collect diagnostic data related to abnormal operating conditions of the operation of the process plant during operation of the process plant;

an economic model incorporating both economic and diagnostic variables stored on a second electronic device and coupled to the data source and to the diagnostic application to receive and use the diagnostic data and the economic data to develop an economic parameter with respect to the operation of the process plant; and

a control application stored on a third electronic device and adapted to use the economic parameter to perform a control activity within the process plant.

2. The system of claim 1, wherein the control application is an optimizer application that produces a set of control target parameters for use in controlling the process plant to thereby optimize the operation of the process plant based on the economic parameter.

3. The system of claim 2, further including a display application adapted to enable a user to select one or more optimizer factors for use by the optimizer application in producing the set of control target parameters.

4. The system of claim 1, wherein the control application is a process control routine adapted to be executed on the controller to use the economic parameter to develop a control signal to be sent to one of the plurality of field devices within the process plant to thereby control the operation of the process plant.

5. The system of claim 1, further including a display application coupled to the economic model that is adapted to display the economic parameter to a user.

6. The system of claim 5, wherein the display application is adapted to display one or more diagnostic parameters associated with the diagnostic data in conjunction with the display of the economic parameter.

7. The system of claim 6, wherein the one or more diagnostic parameters includes parameters associated with the operation of a control loop within the process plant.

8. The system of claim 7, wherein the one or more diagnostic parameters includes a variability measure of one or more control signals within the control loop.

9. The system of claim 7, wherein the one or more diagnostic parameters includes an operational mode indication of one or more control blocks within the control loop.

10. The system of claim 7, wherein the one or more diagnostic parameters includes a limit indication for one or more control signals within the control loop.

11. The system of claim 7, wherein the one or more diagnostic parameters includes one or more alarms associated with one or more control blocks within the control loop.

12. The system of claim 1, wherein the data source is adapted to communicate with the economic model via a wireless communication channel.

13. The system of claim 1, wherein the data source is adapted to communicate with the economic model via a router disposed between the data source and the economic model.

14. The system of claim 13, wherein the data source is a hand held data source that is adapted to communicate with the router via a wireless communication channel.

15. The system of claim 1, further including an execution engine that executes the economic module during runtime of the process plant to develop the economic parameter for delivery to the control application.

16. A method of assisting performing process plant control, comprising:

collecting, on a regular basis at a service provider site, economic data related to economic factors associated with the operation of a process plant during operation of the process plant using a first data source device;

collecting, on a regular basis at a service provider site, process control data related to abnormal operating conditions of control operations within the process plant during operation of the process plant using a second data source device and wherein the process control data is time-correlated to the collected economic data;

running a computer model at the service provider site that models the operation of the process plant using the economic data and the process control data to produce a model output;

using the model output at the service provider site to determine one or more actions to be performed with respect to the operation of the process plant during operation of the process plant and

providing an indication of the one or more actions from the service provider site to the process plant for use in controlling the operation of the process plant.

17. The method of assisting performing process plant control of claim 16, further including charging a fee for one or more of running the computer model, using the computer model to determine the one or more actions and providing the indication of the one or more actions to the process plant.

18. The method of assisting performing process plant control of claim 17, wherein collecting the economic data and collecting the process control data includes collecting the economic data and the process control data at one or more information servers communicatively connected between first and second data sources and the computer model, and automatically delivering the economic data and the process control data from the one or more information servers to the computer model at the service provider site.

19. The method of assisting performing process plant control of claim 17, wherein collecting economic data includes collecting data pertaining to a cost of a material used in the process plant.

20. The method of assisting performing process plant control of claim 17, wherein collecting economic data includes collecting data pertaining to a throughput of the process plant.

21. The method of assisting performing process plant control of claim 17, wherein collecting process control data includes collecting the process control data at a field device disposed within the process plant.

22. The method of assisting performing process plant control of claim 17, wherein collecting process control data includes collecting the process control data at a process controller communicatively connected to one or more field devices disposed within the process plant.

23. The method of assisting performing process plant control of claim 17, wherein using the model output includes using the model output to determine an action designed to optimize the operation of the process plant within respect to a particular criteria.

24. The method of assisting performing process plant control of claim 23, wherein the particular criteria is one of cost or profit.

25. The method of assisting performing process plant control of claim 23, wherein the particular criteria is throughput.

26. The method of assisting performing process plant control of claim 23, wherein the particular criteria is consumption of a particular raw material.

27. The method of assisting performing process plant control of claim 17, wherein using the model output includes using the model output to determine an action related to alerting to the existence of or correcting a detected problem within the process plant.

28. The method of assisting performing process plant control of claim 27, wherein the action related to alerting to the existence of or correcting a detected problem includes generating an alarm to be delivered to a user.

29. The method of assisting performing process plant control of claim 17, wherein using the model output includes providing information for display to a user to indicate an operation of the process plant.

30. The method of assisting performing process plant control of claim 17, wherein using the computer model includes running the computer model to produce a model output indicative of an economic operational parameter associated with one of a number of control loops of the process plant and wherein the one or more actions includes generating a display screen that displays the economic operational parameter associated with the one of the control loops for viewing by a user.

31. The method of assisting performing process plant control of claim 30, further including displaying other parameters associated with the one of the control loops in conjunction with the economic operational parameter associated with the one of the control loops on the display screen.

32. The method of assisting performing process plant control of claim 30, wherein the economic operational parameter is indicative of the utilization of the one of the control loops.

33. The method of assisting performing process plant control of claim 30, wherein the economic operational parameter is indicative of the efficiency of a least a portion of the process plant.

34. The method of assisting performing process plant control of claim 30, wherein the economic operational parameter is indicative of a product production cost of the process plant.

35. The method of assisting performing process plant control of claim 17, wherein the one or more actions includes performing a control function within the process plant.

36. The method of assisting performing process plant control of claim 17, wherein the one or more actions includes providing a display to enable a user to select a control parameter to be met by a control application based on the model output.

37. The method of assisting performing process plant control of claim 36, wherein providing the display includes displaying an economic parameter associated with the control parameter selected by the user.

38. The method of assisting performing process plant control of claim 37, wherein the economic parameter is a savings parameter related to the different costs of operating the plant at different control settings.

39. The method of assisting performing process plant control of claim 36, wherein providing the display includes enabling the user to select at least one of a throughput parameter and a controlled parameter as the control parameter.

40. The method of assisting performing process plant control of claim 36, wherein providing the display includes enabling the user to specify one or more economic factors associated with the operation of the process plant for use in computing the economic parameter.

41. The method of assisting performing process plant control of claim 40, wherein the one or more economic factors includes one of a profit per unit factor and a cost per unit factor.