EP0176655A2
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Programmable controller
Assignee: Hitachi Ltd
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Filing: 1985-03-15
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Granted: —
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Expires: 2005-03-15
Abstract
Abstract A programmable controller comprising storage means (4, 5) to store a program, a central processing unit (3) which executes a logic operation of an input signal on the basis of the program stored in the storage means (5), measurement means (8) to measure an arithmetic processing time of the program, and a measured value storing unit (9) which stores the arithmetic processing time measured by the measurement means, display control means (3, 7) performing a control so as to display the arithmetic processing time stored in the measured value storing unit (9).
Inventors
- 👤 Maohiro Kurokawa
- 👤 Ryouichi Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:49
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/05; G05B19/058; G05B2219/00; G05B2219/10; G05B2219/13; G05B2219/13194
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
A programmable controller comprising: storage means (4,5) to store a program; central processing means (3) to execute a logic operation of an input signal on the basis of the program stored in the storage means (4,5); measurement means (8) to measure an arithmetic processing time of the program; and display control means (3) to perform a control so as to display the arithmetic processing time measured by the measurement means (8).
Claim 2
Dependent Claim
71 words
A programmable controller comprising: storage means (4,5) to store a program; central processing means (3) to execute a logic operation of an input signal on the basis of the program stored in the storage means (4,5); measurement means (8) to measure an arithmetic processing time of the program; and display control means (3) to perform a control so as to display the arithmetic processing time measured by the measurement means (8).
Claim 3
Dependent Claim
16 words
A programmable controller according to claim 1, wherein the storage means is a user RAM (5).
Claim 4
Dependent Claim
18 words
A programmable controller according to claim 1, wherein the display control means is the central processing means (3).
Claim 5
Dependent Claim
46 words
A programmable controller according to one of the claims 1 - 3, characterized in that it further comprises a program input unit (2) which inputs a program; and a display device (7) which displays the arithmetic processing time under the control of the display control means.
Claim 6
Dependent Claim
36 words
A programmable controller according to claim 4, characterized in that the display control means in the central processing means, and the display device is assembled in the same casing as that of the program input unit.
Claim 7
Dependent Claim
32 words
A programmable controller according to one of the preceding claims, characterized in that it further comprises measured value storing means (9) to store the arithmetic processing time measured by the measurement means.
Claim 8
Dependent Claim
32 words
A programmable controller according to claim 6, characterized in that the display control means perform a control so as to display the arithmetic processing time stored in said measured value storing means.
Claim 9
Dependent Claim
78 words
A programmable controller according to claim 6, characterized in that the measured value storing means are divided in at least two parts, in any of which the arithmetic processing time measured by the measurement means is stored according to a magnitude thereof; and the display control means perform a control so as to selectively display the measured values stored in the divided parts of the measured value storing portion, on the basis of signals of display selection means.
Claim 10
Dependent Claim
24 words
A programmable controller according to one of the claims 6 - 8, characterized in that the display control means is the central processing means.
Claim 11
Dependent Claim
37 words
A programmable controller according to claim 8, wherein said measured value storing means is divided in three parts, in which a maximum value, a minimum.value and an average value of the arithmetic processing time are stored respectively.
Claim 12
Dependent Claim
32 words
A programmable controller according to claim 8, wherein said measurement means is fed with the input signal and measures either of an ON time and an OFF time of the input signal.
Claim 13
Dependent Claim
106 words
A programmable controller according to one of the claims 1 to 3, characterized in that it further comprises edge detection means to detect edges of the input signal which is supplied from an external signal source to the central processing means; whereby the measurement means selectively measure either the arithmetic processing time of the program by the central processing means and a time between the edges of the input signal; and measured value storing means to store the value measured by the measurement means; whereby the display control means perform a control so as to display the measured value stored in the measured value storing means.
Claim 14
Dependent Claim
37 words
A programmable controller according to claim 12, wherein the measured value storing means is divided in three parts, in which a maximum value, a minimum value and an average value of the measured value are stored respectively.
Claim 15
Dependent Claim
67 words
A programmable controller according to claim 12, wherein the measured value storing means is divided in three parts, in which a maximum value, a minimum value and an average value of the measured value are stored respectively, and the display control means perform a control so as to selectively indicate which of the maximum value, the minimum value and the average value the displayed measured value is.
References Cited (Backward Citations)
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