Mode Selectable field transmitter

• US 20080218333A1
• Filed: 03/05/2007
• Published: 09/11/2008
• Est. Priority Date: 03/05/2007
• Status: Active Grant

• Current Assignee: Rosemount Incorporated (Emerson Electric Company)
• Original Assignee: Rosemount Incorporated (Emerson Electric Company)
• Inventors: Hedtke, Robert C., Trimble, Steven Richard, Schulte, John Paul
• Granted Patent: US 7,808,379 B2
• Time in Patent Office: Days
• US Class Current: 340/534
• CPC Class Codes: G01D 5/14 influencing the magnitude of a current or voltage

Abstract

A selectable mode field transmitter is configurable to operate in one of a plurality of operating modes having different combinations of function, performance, and power consumption. The selectable mode field transmitter includes a housing, a sensor located within the housing, and transmitter circuitry for transmitting data provided by the sensor to a receiver external to the housing. The transmitter circuitry includes a controller that electrically configures the transmitter circuitry to one of a plurality of operational modes in response to mode selection data received from a source external to the housing. Therefore, the selectable mode field transmitter can be configured based on the needs or requirements of a particular application.

Claims

1. A mode selectable field transmitter comprising:

a housing;

a sensor located within the housing that generates an electrical signal representative of a sensed process variable;

transmitter circuitry located within the housing that transmits an output to a receiver external to the housing based on the electrical signal provided by the sensor, wherein the transmitter circuitry is configurable to a plurality of operating modes having different combinations of function, performance, and power consumption; and

wherein the transmitter circuitry includes a controller that electrically configures the transmitter circuitry to one of the plurality of operating modes in response to mode selection data received from a source external to the housing.

2. The mode selectable transmitter of claim 1, wherein the transmitter circuitry includes:

an analog-to-digital (A/D) converter that converts the electrical signals provided by the sensor to digital signals, wherein the A/D converter is electrically configurable by the controller to operate at a selected update rate.

3. The mode selectable transmitter of claim 2, wherein the transmitter circuitry includes:

an A/D bias circuit connected to regulate power provided to the A/D converter, wherein the A/D bias circuit is electrically configurable by the controller to regulate the power provided to the A/D converter to a selected amount.

4. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a signal processor that provides signal compensation in response to the electrical signal provided by the sensor, wherein the signal processor is electrically configurable by the controller to execute a selected signal compensation algorithm.

5. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a clock for generating a timing signal that is provided to components within the transmitter circuitry, wherein the clock is electrically configurable by the controller to provide the timing signal at a selected frequency.

6. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a local operator interface (LOI) that provides a graphical display for displaying data, wherein the LOI is electrically configurable by the controller to provide a selected level of functionality.

7. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a digital communication circuit that provides digital communication signals between the mode selectable transmitter and the external receiver, wherein the digital communication circuit is electrically configurable by the controller to generate digital communication signals at a selected signal strength.

8. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a digital communication circuit that provides digital communication signals between the mode selectable transmitter and the external receiver, wherein the digital communication circuit is electrically configurable by the controller to operate in either a sleep mode or an active mode.

9. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a digital to analog (D/A) converter that generates the output that is transmitted to the external receiver based on the electrical signal provided by the sensor, wherein the D/A converter is electrically configurable by the controller to operate at a selected response rate.

10. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

memory for storing the mode selection data received from the source external to the transmitter, wherein the controller accesses the mode selection data in the memory and electrically configures the transmitter circuitry based on the stored mode selection data.

11. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

memory for storing mode selection data corresponding to a plurality of operating modes; and

wherein the controller receives the mode selection command from the source external to the transmitter identifying a selected mode of operation, wherein the controller accesses the mode selection data corresponding to the selected mode of operation and configures the transmitter circuitry based on the selected mode selection data.

12. The mode selectable field transmitter of claim 1, wherein the transmitter circuitry includes:

a current measuring circuit that monitors current usage of the transmitter circuitry and provides the monitored current usage to the controller, wherein the controller configures the transmitter circuitry based on the monitored current usage.

20. The mode selectable field transmitter of claim 1, wherein the plurality of components include:

a digital to analog (D/A) converter for converting a digital signal representing the sensed process variable to an analog representation, wherein the D/A converter is electrically configurable by the controller to convert the digital signal to the analog representation at a response rate based on the selected mode of operation.

13. A mode selectable field transmitter comprising:

a sensor that generates an electrical signal in response to a sensed process variable;

a plurality of components connected to transmit an output signal in response to the electrical signal generated by the sensor, wherein at least one of the plurality of components is configurable to provide different modes of operation;

a memory for storing mode configuration data received from an external source corresponding to a selected mode of operation; and

a controller for electrically configuring the at least one configurable component based on the mode configuration data stored in the memory.

14. The mode selectable transmitter of claim 13, wherein the plurality of components include:

an analog-to-digital (A/D) converter that converts the electrical signal provided by the sensor to a digital signal, wherein the A/D converter is electrically configurable by the controller to generate the digital signal at an update rate based on the selected mode of operation.

15. The mode selectable field transmitter of claim 13, wherein the plurality of components include:

a signal processor that provides signal compensation to a signal received in response to the sensed process variable, wherein the signal processor is electrically configurable by the controller to provide a level of signal compensation based on the selected mode of operation.

16. The mode selectable field transmitter of claim 13, wherein the plurality of components include:

a clock that generates a timing signal that is provided to one or more of a plurality of components, wherein the clock is electrically configurable by the controller to generate the timing signal at a frequency based on the selected mode of operation.

17. The mode selectable field transmitter of claim 13, wherein the plurality of components include:

a local operator interface (LOI) for displaying data, wherein the LOI is electrically configurable by the controller to provide a level of functionality based on the selected mode of operation.

18. The mode selectable field transmitter of claim 13, wherein the plurality of components include:

a digital communication circuit for generating a digital signal that is communicated from the mode selectable field transmitter to an external receiver, wherein the digital communication circuit is electrically configurable by the controller to generate the digital signal at a selected signal strength based on the selected mode of operation.

19. The mode selectable field transmitter of claim 13, wherein the plurality of components include:

a digital communication circuit for providing digital communication between the mode selectable field transmitter and a receiver external to the mode selectable field transmitter, wherein the digital communication circuit is electrically configurable by the controller to operate in a sleep mode until the digital communication circuit receives a request to provide digital communications.

21. A method of configuring a mode selectable field transmitter based on a selected mode of operation, the method comprising:

receiving mode selection data from a source external to the mode selectable transmitter; and

electrically configuring transmitter circuitry within the mode selectable field transmitter based on the received mode selection data to implement one of a plurality of operating modes, each operating mode providing a different combination of function, performance, and power allocation.

22. The method of claim 21, wherein electrically configuring the transmitter circuitry based on a fast response mode of operation includes:

allocating additional power to an analog-to-digital (A/D) converter by electrically configuring the A/D converter to operate at an increased update rate.

23. The method of claim 21, wherein configuring the transmitter circuitry based on a fast start mode of operation includes:

allocating additional power to an analog-to-digital (A/D) converter by electrically configuring the A/D converter to acquire a first sensed process variable at an increased update rate; and

re-allocating power from the A/D converter to other components within the transmitter circuitry after the first sensed process variable is acquired.

24. The method of claim 21, wherein configuring the transmitter circuitry based on a high performance signal compensation mode of operation includes:

allocating additional power to a signal processor to execute a more complex signal processing algorithm to provide improved signal compensation.

25. The method of claim 24, wherein configuring the transmitter circuitry based on the high performance signal compensation mode of operation further includes:

electrically configuring a clock to provide a clock signal having an increased frequency to the signal processor.

26. The method of claim 21, wherein configuring the transmitter circuitry based on an advanced local operator interface (LOI) mode of operation includes:

allocating additional power to a local operator interface by electrically configuring the LOI to provide additional functionality.

27. The method of claim 21, wherein configuring the transmitter circuitry based on an on-demand local operator interface (LOI) mode of operation includes:

operating a local operator interface (LOI) in a sleep mode until receiving a request for operation; and

allocating power to the LOI for a set amount of time following the request for operation by electrically configuring the LOI to operate in a non-sleep mode.

28. The method of claim 21, wherein configuring the transmitter circuitry based on a high speed analog mode of operation includes:

allocating additional power to a digital-to-analog (D/A) converter by electrically configuring the D/A converter to operate at an increased response rate.

29. The method of claim 21, wherein configuring the transmitter circuitry based on a high signal mode of operation includes:

allocating additional power to a digital communication circuit by electrically configuring the digital communication circuit to provide digital communication signals at an increased signal strength.

30. The method of claim 21, wherein configuring the transmitter circuitry based on a half power mode of operation includes:

allocating power between the transmitter circuitry based on an overall reduction in total power available to the mode selectable field transmitter.