Patent US6119047A successfully refreshed from Google Patents.
US6119047A
Expired / Lapsed
US
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Transmitter with software for determining when to initiate diagnostics
Assignee: Rosemount Inc
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Filing: 1997-11-10
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Granted: 2000-09-12
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Expires: 2017-11-10
Abstract
Abstract A process device couples to a process control loop. The process device receives a process signal. A memory in the process device contains a nominal parameter value. Computing circuitry provides an event output based upon the stored nominal value and the process signal. Output circuitry provides an output in response to the event output.
Inventors
- 👤 Evren Eryurek
- 👤 Jogesh Warrior
- 👤 Steven R. Esboldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0218; G05B23/0221; G05B13/00; G05B13/02; G05B13/0265; G05B13/0275; G05B21/00; G05B21/02; G05B23/0259; G05B23/0275; G05B23/0278
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
104 words
A process device coupled to a process control loop, comprising: a process signal input providing a process signal related to a process; memory containing a nominal parameter value; computing circuitry providing an event output in response to an event in the process, the evens detected based upon the process signal and the nominal parameter value, the computing circuitry providing the event output when the process has stabilized after initialization; and output circuitry outputting the event output; wherein the process control loop is selected from the group consisting of two wire process control loops, three wire process control loops and four wire process control loops.
Claim 2
Dependent Claim
104 words
A process device coupled to a process control loop, comprising: a process signal input providing a process signal related to a process; memory containing a nominal parameter value; computing circuitry providing an event output in response to an event in the process, the evens detected based upon the process signal and the nominal parameter value, the computing circuitry providing the event output when the process has stabilized after initialization; and output circuitry outputting the event output; wherein the process control loop is selected from the group consisting of two wire process control loops, three wire process control loops and four wire process control loops.
Claim 3
Dependent Claim
16 words
The process device of claim 1 wherein process stabilization is determined by monitoring a process variable.
Claim 4
Dependent Claim
25 words
The process device of claim 2 wherein process stabilization is determined by monitoring a rate of change of a statistical parameter of the process variable.
Claim 5
Dependent Claim
12 words
The process device of claim 3 wherein the statistical parameter comprises RMS.
Claim 6
Dependent Claim
13 words
The process device of claim 3 wherein the statistical parameter comprises standard deviation.
Claim 7
Dependent Claim
32 words
The process device of claim 3 wherein process stabilization is determined if the rate of change of the statistical parameter is less than about 2% of a span of the process variable.
Claim 8
Dependent Claim
20 words
The process device of claim 1 wherein the device is completely powered with power received from the process control loop.
Claim 9
Dependent Claim
24 words
The process device of claim 1 wherein the process signal input comprises a sensor input channel and the process signal comprises a process variable.
Claim 10
Dependent Claim
32 words
The process device of claim 8 wherein the process variable is selected from the group consisting of pressure, temperature, pH, flow, turbidity, level, position, conductivity, motor current, motor back emf and vibration.
Claim 11
Dependent Claim
23 words
The process device of claim 1 wherein the process signal input comprises a control channel and the process signal comprises a control signal.
Claim 12
Dependent Claim
29 words
The process device of claim 1 wherein the process signal input comprises input circuitry coupled to the control loop to receive the process signal from the process control loop.
Claim 13
Independent Claim
96 words
A method in a process device coupled to a process control loop, comprising: receiving a process signal related to a process; retrieving a nominal parameter value stored in a memory; waiting until the process has stabilized after initialization; detecting an event in the process based upon the process signal and the nominal parameter value when the process has stabilized; and outputting a signal indicative of the event output; wherein the process control loop is selected from the group consisting of two wire process control loops, three wire process control loops and four wire process control loops.
Claim 14
Independent Claim
96 words
A method in a process device coupled to a process control loop, comprising: receiving a process signal related to a process; retrieving a nominal parameter value stored in a memory; waiting until the process has stabilized after initialization; detecting an event in the process based upon the process signal and the nominal parameter value when the process has stabilized; and outputting a signal indicative of the event output; wherein the process control loop is selected from the group consisting of two wire process control loops, three wire process control loops and four wire process control loops.
Claim 15
Dependent Claim
14 words
The method of claim 12 including determining process stabilization by monitoring a process variable.
Claim 16
Dependent Claim
24 words
The method of claim 13 wherein process stabilization is determined by monitoring a rate of change of a statistical parameter of the process variable.
Claim 17
Dependent Claim
11 words
The method of claim 14 wherein the statistical parameter comprises RMS.
Claim 18
Dependent Claim
12 words
The method of claim 14 wherein the statistical parameter comprises standard deviation.
Claim 19
Dependent Claim
31 words
The method of claim 14 wherein process stabilization is determined if the rate of change of the statistical parameter is less than about 2% of a span of the process variable.
Claim 20
Dependent Claim
18 words
The method of claim 12 including completely powering the device with power received from the process control loop.
Claim 21
Dependent Claim
13 words
The method of claim 12 wherein the process signal comprises a process variable.
Claim 22
Dependent Claim
31 words
The method of claim 19 wherein the process variable is selected from the group consisting of pressure, temperature, pH, flow, turbidity, level, position, conductivity, motor current, motor back emf and vibration.
Claim 23
Dependent Claim
13 words
The method of claim 12 wherein the process signal comprises a control signal.
Claim 24
Dependent Claim
28 words
The method of claim 12 wherein the process signal input comprises input circuitry coupled to the control loop to receive the process signal from the process control loop.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-09-12 | 2004-03-13 | 2004-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-12 | 2008-03-13 | 2008-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-12 | 2012-03-13 | 2012-09-12 | $7700.00 | Window Closed / Lapsed |