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US 7,278,066 B2Granted
Automatic fieldbus device load-mode identification
AssigneeHoneywell International Inc.
InventorWilliam R. Hodson
Life of this patent
Estimating the term…
Abstract
A Fieldbus device and method for handling errors arising from parameter write messages. A load mode identifier detects if the parameter write messages are operator initiated or program initiated. If program initiated, communication of errors resulting from execution of the parameter writes is suppressed. Also, a rejection of a parameter write operation arising from the errors is suppressed for program initiated program write messages.
Claims6
A method of handling errors arising from parameter write messages for a Fieldbus device, said method comprising:
- detecting a group of said parameter write messages that occur closer together than operator initiated parameter write messages;
- suppressing a communication of errors arising from said group of parameter write messages or a rejection of a parameter write operation, wherein said rejection results from any of said errors arising from said group of parameter write messages;
- setting a load-mode indicator ON for said group of parameter write messages, wherein said communication of errors or said rejection of a parameter write operation is suppressed in response to said load-mode indicator being ON, wherein said load-mode indicator is set ON and OFF based on a comparison of the times of occurrence of a current parameter write message and a previous parameter write message with a time interval, and wherein said time interval is less than a time period between said operator initiated parameter write messages.
A Fieldbus device comprising:
- a processor, a memory and a load mode identifier that handles errors resulting from parameter write messages, said load identifier performing the operations of:
- detecting a group of said parameter write messages that occur closer together than operator initiated parameter write messages;
- suppressing a communication of errors arising from said group of parameter write messages or a rejection of a parameter write message, wherein said rejection results from any of said errors arising from said group of parameter write messages;
- performing the operation of setting a load-mode indicator ON for said group of parameter write messages, wherein said communication of errors or said rejection of a parameter write message is suppressed in response to said load-mode indicator being ON, wherein said load-mode indicator is set ON and OFF based on a comparison of the times of occurrence of a current parameter write message and a previous parameter write message with a time interval, and wherein said time interval is less than a time period between said operator initiated parameter write messages.
1 more element
Dependencies are inferred from the claim text.