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US 6,119,047 AGranted
Transmitter with software for determining when to initiate diagnostics
AssigneeRosemount Inc.
InventorsEvren Eryurek, Jogesh Warrior, Steven R. Esboldt
Life of this patent
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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.
Claims22
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.
3 more elements
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.
4 more elements
Dependencies are inferred from the claim text.