Boots – shoes – and leggings
Patent
1984-07-12
1987-01-06
Smith, Jerry
Boots, shoes, and leggings
364188, 340722, G05B 1101, G05B 902, G09G 106
Patent
active
046351833
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a control unit provided with a status display showing the input state of signals from external units, the state of internal units, or the output state.
BACKGROUND ART
In general, numerical control units, etc. for automatic machine control or sequential control units or other control units display the input and output state and internal state for diagnosis of components of the units, debugging of control programs, and the like.
In the above-mentioned method of display of conventional control units, the on or off state of output signals are indicated by lights or "1" or "0" are arranged on a CRT display for displaying the input and output states and internal state. Therefore, they only display the current input and output states. To resolve problems relating to timing, however, the operator needs to know the above states over a certain time interval. With the conventional method, where only the current states are displayed, it is difficult to detect by sight the length of on or off times of signals, time gaps between signals, etc. Therefore, conventional status display methods have the disadvantage that they are useless for resolving problems relating to timing.
DISCLOSURE OF THE INVENTION
The object of the present invention, in consideration of the above-mentioned problems in the conventional methods, is to facilitate causal analysis of problems arising from timing of signals in control units, based on the idea of providing the control units with the ability to time-chart and display the changes in the input and output states and internal state of control units over time.
The gist of the present invention, which achieves the above-mentioned object, lies in a control unit having the ability to display the input state of signals from external units, the state of internal units, or the output state, characterized by being provided with a display provided with a keyboard for inputting the desired display content, the intake time of the display content, and the conditions for stopping the intake of the display content, a timer generating a clock signal at predetermined times, a memory for intake of the desired display content at desired intake time intervals in response to conditions set using the keyboard, a display for displaying the data intaken in the memory when the intake stop conditions are met, and a processor for synchronizing and controlling the memory and display by a clock signal.
BRIEF DESCRIPTION OF THE DRAWINGS
The above object and features of the present invention will become more apparent from reading the following description of embodiments made in reference to the attached drawings.
FIG. 1 is a block diagram of a conventional numerical control unit and its peripheral units;
FIG. 2 is an example of its status display;
FIG. 3 and FIG. 4 are time charts of one example of input signals in a conventional unit;
FIG. 5 is a block diagram of a numerical control unit according to a first embodiment of the present invention;
FIG. 6 is a view of one example of a time chart of data displayed by the unit of FIG. 5;
FIG. 7 is a block diagram of a numerical control unit according to a second embodiment of the present invention; and
FIG. 8 is a view of one example of a time chart of data displayed by the unit of FIG. 7.
BEST MODE FOR CARRYING OUT THE INVENTION
Before describing the embodiments of the present invention, a description will be given of examples of the prior art and their problems in reference to FIGS. 1 to 4.
FIG. 1 is a block diagram of a conventional numerical control unit and its peripheral units. In the figure, a numerical control unit 1 is provided with a controller 2 and a CRT display 3 for status display. In response to signals input from an external input unit 5 and a detector 6 to the numerical control unit 1, for example, a servo motor 7, actuator 8, or lamp 9 in the external output unit 4 is controlled.
Whether or not the input signals S.sub.1, S.sub.2, S.sub.3, and S.sub.4 from the external input unit 5 are input to the nu
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patent: 4475160 (1984-10-01), Inaba
Isobe Shin-ichi
Yonekura Mikio
Fanuc Limited
Grossman Jon D.
Smith Jerry
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