Dedicated process diagnostic device

• US 7,630,861 B2
• Filed: 05/25/2006
• Issued: 12/08/2009
• Est. Priority Date: 03/28/1996
• Status: Expired due to Fees

• Current Assignee: Rosemount Incorporated (Emerson Electric Company)
• Original Assignee: Rosemount Incorporated (Emerson Electric Company)
• Inventors: Johnson, Amy K., Davis, Dale S., Brown, Gregory C., Nelson, Richard L., Nelson, Scott D., Longsdorf, Randy J.
• Primary Examiner(s): Lau; Tung S
• Assistant Examiner(s): Kundu; Sujoy K
• Application Number:
  US11/440,582
• Publication Number:
  US 20070010968A1
• Time in Patent Office: 1,293 Days
• Field of Search: 702/183, 702 33- 34, 702/47, 702/65, 702/76, 702/104, 702/130, 702/140, 700/30, 700/48, 700/51, 700/54, 700/128, 370/410, 370/462, 370/465, 73/13.5, 738/611.1
• US Class Current: 702/183
• CPC Class Codes: G01F 1/50 Correcting or compensating means
• CPC Class Codes: G01F 15/00 Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 2219/24033 Failure, fault detection and isolation
• CPC Class Codes: G08C 19/02 in which the signal transmitted is magnitude of current or voltage G08C19/36, G08C19/38 take precedence

Abstract

A field mountable dedicated process diagnostic device is used for diagnosing operation of an industrial control or monitoring system. An input is configured to receive at least one process signal related to operation of the industrial process. A memory contains diagnostic program instructions configured to implement a diagnostic algorithm using the process signal. The diagnostic algorithm is specific to the industrial process. A microprocessor performs the diagnostic program instructions and responsively diagnoses operation of the process based upon the process signal.

Claims

1. A field mountable dedicated process diagnostic device coupled to a process control loop for use in diagnosing operation of an industrial control or monitoring system of an industrial process, comprising:

an input configured to receive at least one process signal related to operation of the industrial process from a diagnostic sensor;

a memory in the field mountable dedicated process diagnostic device containing diagnostic program instructions configured to implement a plurality of diagnostic algorithms, using the at least one process signal and wherein the at least one of the plurality of diagnostic algorithms is specific to the industrial process wherein the plurality of diagnostic algorithms include at least two diagnostic algorithms each of which are specific to different industrial processes;

a selection input configured to receive diagnostic algorithm selection data indicative of a type of the industrial process and which identifies one of the at least two diagnostic algorithms and thereby selects a diagnostic algorithm; and

a microprocessor configured to perform the diagnostic program instructions and responsively diagnose operation of the industrial process based upon the at least one process signal and the selected diagnostic algorithm.

2. The apparatus of claim 1 wherein the dedicated process diagnostic device is completely powered with power received over a two wire process control loop.

3. The apparatus of claim 1 wherein the process control loop comprises a 4-20 mA current loop.

4. The apparatus of claim 1 wherein the process control loop operates in accordance with the HART®

Communication Standard.

5. The apparatus of claim 1 wherein the process control loop operates in accordance with the Fieldbus Communication Standard.

6. The apparatus of claim 1 wherein the input is configured to receive at least one input from a process variable sensor.

7. The apparatus of claim 1 wherein the process signal is received from the two wire process control loop.

8. The apparatus of claim 1 wherein the input is configured to receive a process signal from a diagnostic sensor directly coupled to the field mountable dedicated process diagnostic device.

9. The apparatus of claim 1 including a conversion circuit configured to convert the process signal to a format compatible with the microprocessor.

10. The apparatus of claim 1 including an output configured to provide a wireless output.

11. The apparatus of claim 1 including a visual output.

12. The apparatus of claim 1 including a Local Operator Interface.

13. The apparatus of claim 1 including an acoustic transducer.

14. The apparatus of claim 1 wherein the industrial process comprises a heat exchanger process and the diagnostic program instructions are specific to the heat exchanger process.

15. The apparatus of claim 1 wherein the diagnostic program instructions are configured to learn operation of the process.

16. The apparatus of claim 1 wherein the diagnostic sensor comprises a vibration sensor and wherein the diagnostic algorithm is specific to diagnosing operation of a heat exchanger.

17. The apparatus of claim 1 wherein the configuration input comprises a local operator interface.

18. The apparatus of claim 1 wherein the selection input comprises a wireless input.

19. The apparatus of claim 1 wherein the selection input is received through the process control loop.

20. A method of diagnosing operation of an industrial control or monitoring system of an industrial process performed in a field mountable dedicated process diagnostic device, comprising:

mounting the field device in a field of the industrial process;

storing diagnostic program instructions in a memory which are configured to implement a plurality of diagnostic algorithms, at least one of the plurality of diagnostic algorithms is specific to the industrial process and responsive to the process signal, wherein the plurality of diagnostic algorithms include at least two diagnostic algorithms each of which are specific to different industrial processes;

receiving at least one process signal related to operation of the industrial process from a remote process device;

receiving a selection input configured to receive diagnostic algorithm selection data indicative of a type of the industrial process and which identifies one of the at least two diagnostic algorithms and thereby selects a diagnostic algorithm;

retrieving diagnostic program instructions from the memory located in the field mountable dedicated process diagnostic device which implement the selected diagnostic algorithm;

diagnosing operation of the industrial process based upon the retrieved program instructions and the selected diagnostic algorithm;

providing an output related to the diagnosing; and

completely powering the field mountable dedicated diagnostic device with power received from a two wire process control loop.

21. The method of claim 20 wherein the two wire process control loop comprises a 4-20 mA current loop.

22. The method of claim 20 wherein the two wire process control loop operates in accordance with the HART®

Communication Standard.

23. The method of claim 20 wherein the two wire process control loop operates in accordance with the Fieldbus Communication Standard.

24. The method of claim 20 wherein the at least one process signal comprises a process variable signal.

25. The method of claim 20 including converting the process signal to a format compatible with a microprocessor.

26. The method of claim 20 including providing a wireless output.

27. The method of claim 20 including providing a visual output.

28. The method of claim 20 including providing a Local Operator Interface.

29. The method of claim 20 including receiving the process signal from an acoustic transducer.

30. The method of claim 20 wherein the industrial process comprises a heat exchanger process and the diagnostic program instructions are specific to the heat exchanger process.

31. The method of claim 20 wherein the diagnostic program instructions are configured to learn operation of the process.

32. A field mountable diagnostic device for diagnosing operation of an industrial control or monitoring system of an industrial process, comprising:

means for receiving at least one process signal related to operation of the industrial process from a remote process device;

memory means located in the field mountable dedicated process diagnostic device for storing diagnostic program instructions in a memory which are configured to implement a plurality of diagnostic algorithms, at least one of the plurality of diagnostic algorithms is specific to the industrial process and responsive to the process signal, wherein the plurality of diagnostic algorithms include at least two diagnostic algorithms each of which are specific to different industrial processes;

means for receiving diagnostic algorithm selection data indicative of a type of the industrial process and which identifies one of the at least two diagnostic algorithms and thereby selecting a diagnostic algorithm;

means for retrieving diagnostic program instructions which implement the at least one diagnostic algorithm;

means for diagnosing operation of the industrial process based upon the retrieved program instructions and the selected diagnostic algorithm; and

means for completely powering the field mountable dedicated diagnostic device with power received from a two wire process control loop.