Source: http://www.google.com/patents/US5970430?dq=%22Meaning-based+advertising+and+document+relevance+determination%22
Timestamp: 2016-10-23 16:16:03
Document Index: 372042546

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Patent US5970430 - Local device and process diagnostics in a process control network having ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA field device for use in a process control network having a plurality of devices communicatively coupled by a two-wire, all-digital communication bus includes a connector that connects the field device to the two-wire, all-digital bus to enable all-digital communication over the bus, a memory that stores...http://www.google.com/patents/US5970430?utm_source=gb-gplus-sharePatent US5970430 - Local device and process diagnostics in a process control network having distributed control functionsAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5970430 APublication typeGrantApplication numberUS 08/922,938Publication dateOct 19, 1999Filing dateSep 3, 1997Priority dateOct 4, 1996Fee statusPaidAlso published asCA2267527A1, CA2267527C, CN1232553A, CN1238776C, CN1598722A, CN100373274C, DE69717838D1, DE69717838T2, EP0929850A1, EP0929850B1, EP1022626A2, EP1022626A3, EP1022626B1, US6026352, WO1998014848A1Publication number08922938, 922938, US 5970430 A, US 5970430A, US-A-5970430, US5970430 A, US5970430AInventorsHarry A. Burns, Brent H. Larson, Larry K. BrownOriginal AssigneeFisher Controls International, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (39), Non-Patent Citations (32), Referenced by (273), Classifications (16), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetLocal device and process diagnostics in a process control network having distributed control functions
US 5970430 AAbstract
1. A field device for use in a process control network having a plurality of devices communicatively coupled by an all-digital communication bus, the field device comprising:a connector that connects to the all-digital bus to enable all-digital communication over the bus; a memory that stores a diagnostic test routine having a series of diagnostic test instructions; a controller that performs the diagnostic test instructions stored in the memory to implement a diagnostic test using an operational capability of the field device; a data collection unit that collects diagnostic data generated during the diagnostic test; and a communication unit that communicates the collected diagnostic data over the bus in an all-digital format. 2. The field device of claim 1, further comprising a positioner coupled to a valve having a moveable valve member and wherein the diagnostic test instructions specify movement of the valve member.
16. A field device for use in a process control network having a plurality of devices communicatively coupled by a bus, the field device comprising:a memory that stores a diagnostic test routine having a series of diagnostic test instructions; a device controller that performs the diagnostic test instructions stored in the memory to implement a diagnostic test using an operational capability of the field device; a data collection unit that collects diagnostic data generated during the diagnostic test; and a communication unit that receives the diagnostic test instructions from a second one of the plurality of devices via the bus, that stores the received diagnostic test instructions in the memory and that communicates the collected diagnostic data over the bus. 17. The field device of claim 16, wherein the diagnostic test instructions are written in a program language and the device controller includes a program language interpreter that interprets the diagnostic test instructions to perform the diagnostic test.
23. A field device for use in performing a process diagnostic test in a process control network having a plurality of devices communicatively coupled by a bus, the field device comprising:a memory that stores a process diagnostic test routine having a series of diagnostic test instructions to be implemented by the field device; a device controller that performs the process diagnostic test instructions stored in the memory to implement a process diagnostic test using an operational capability of the field device; a data collection unit that collects diagnostic data generated by the field device during the process diagnostic test and that receives further process diagnostic data from a second one of the plurality of devices via the bus; and a communication unit that communicates the collected diagnostic data and the further process diagnostic data over the bus after the process diagnostic test is completed. 24. The field device of claim 23, wherein the communication unit is configured to communicate over the bus using a Fieldbus communication protocol and wherein the data collection unit is a function block configured to receive the further process diagnostic data from the second one of the plurality of devices over the bus.
27. A process control network comprising:a host device that generates commands and receives data; a plurality of field devices; and a bus communicatively interconnecting the host device and the plurality of field devices; wherein one of the plurality of field devices includes a memory that stores a diagnostic test routine having a series of diagnostic test instructions to be implemented by the one device, a device controller that performs the diagnostic test instructions stored in the memory to implement a diagnostic test using an operational capability of the field device, a data collection unit that collects diagnostic data generated by the one device during the diagnostic test, and a communication unit that communicates the collected diagnostic data over the bus to the host device after the diagnostic test is completed. 28. The process control network of claim 27, wherein the diagnostic test routine is a process diagnostic test routine and the data collection unit receives process diagnostic data from a second one of the plurality of field devices via the bus.
38. A field device for use in performing a diagnostic test in a process control network having a plurality of devices communicatively coupled by a bus and using the Fieldbus communication protocol, the field device comprising:a memory that stores the diagnostic test routine having a series of diagnostic test instructions to be implemented by the field device; a device controller that performs the diagnostic test instructions stored in the memory to implement a diagnostic test using an operational capability of the field device; a data collection function block that collects diagnostic data generated during the diagnostic test; and a communication unit that communicates the collected diagnostic data over the bus after the diagnostic test is completed. 39. The field device of claim 38, wherein the diagnostic test is a device diagnostic test and wherein the data collection function block collects data from the field device.
To overcome some of the problems inherent in the use of proprietary DCSs, the process control industry has developed a number of standard, open communication protocols including, for example, the HART�, PROFIBUS�, WORLDFIP�, LONWORKS�, Device-Net�, and CAN protocols, which enable field devices made by different manufacturers to be used together within the same process control network. In fact, any field device that conforms to one of these protocols can be used within a process to communicate with and to be controlled by a DCS controller or other controller that supports the protocol, even if that field device is made by a different manufacturer than the manufacturer of the DCS controller.
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