US5469352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation history display device of numerical control apparatus
Assignee: Fanuc Corp
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Filing: 1993-08-24
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Granted: 1995-11-21
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Expires: 2013-08-24
Abstract
Abstract An operation history display device of a numerical control apparatus by which a fault causing factor can be easily specified. Key input means outputs the key signal of an operation key depressed by an operator to input a command to the numerical control apparatus. Change detection means detects a change of an output signal and outputs the signal to which the change is caused. Operation history control means stores the signal name and the like of the signal to which the change is caused to a history buffer together with a present time output from a timer as history data. Thereafter, display control means displays the history data stored in the history buffer on a display unit in response to a predetermined operation performed by the operator.
Inventors
- 👤 Masashi Yukutomo
- 👤 Shigeru Isohata
- 👤 Osamu Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:13
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4063; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35291
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
An operation history display device of a numerical control apparatus for displaying a history of numerical control apparatus operational signals, comprising: input means for inputting a numerical control operational signal to said numerical control apparatus; change detection means for detecting a change of said numerical control operational signal and outputting the changed signal; a timer for outputting a present time; operation history control means for receiving the changed signal output from the change detection means and the present time from the timer and creating history data of the changed signal; a history buffer for storing a name of the changed signal and said present time in a history buffer as history data; and display control means for displaying said history data stored in said history buffer on a display unit in response to a predetermined operation performed by the operator.
Claim 2
Dependent Claim
140 words
An operation history display device of a numerical control apparatus for displaying a history of numerical control apparatus operational signals, comprising: input means for inputting a numerical control operational signal to said numerical control apparatus; change detection means for detecting a change of said numerical control operational signal and outputting the changed signal; a timer for outputting a present time; operation history control means for receiving the changed signal output from the change detection means and the present time from the timer and creating history data of the changed signal; a history buffer for storing a name of the changed signal and said present time in a history buffer as history data; and display control means for displaying said history data stored in said history buffer on a display unit in response to a predetermined operation performed by the operator.
Claim 3
Dependent Claim
48 words
An operation history display device of a numerical control apparatus as recited in claim 1, wherein said input means for inputting a numerical control operational signal comprises a signal input means for inputting at least one of an I/O signal, an alarm signal, and a power input signal.
Claim 4
Dependent Claim
35 words
An operation history display device of a numerical control apparatus as recited in claim 1, further comprising external output means for outputting said history data stored in said history buffer to an external memory unit.
Claim 5
Dependent Claim
25 words
An operation history display device of a numerical control apparatus as recited in claim 1, wherein said history buffer is comprised of a non-volatile memory.
Claim 6
Dependent Claim
25 words
An operation history display device of a numerical control apparatus as recited in claim 1, wherein said history buffer is comprised of a ring buffer.
Claim 7
Dependent Claim
30 words
An operation history display device of a numerical control apparatus as recited in claim 1, wherein said history data is converted to binary form and stored in said history buffer.
Claim 8
Dependent Claim
31 words
An operation history display device as recited in claim 1, wherein said input means comprises a key input means for inputting a signal from an operation key depressed by an operator.
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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) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |