JPH01173095A - Digital input/output state display system - Google Patents

Abstract

PURPOSE:To quickly check whether input and output states are normal or abnormal by providing a two-color light emitting element at every input and output points being in a corresponding relation of digital input and output lines and executing a display by different colors, respectively in accordance with the input and output states. CONSTITUTION:Latch data of a data latching circuit 21 is converted to a necessary signal by an output circuit 24, and sent out to a process. On the other hand, an input signal from the process is converted to necessary data and outputted to a data bus 23 through a buffer circuit 27. In this constitution, at every input and output points being in a corresponding relation to each other of an output side of the latching circuit 21 and an output side of the input circuit 25, two-color light emitting elements 28 are provided so as to form a pair. In these elements, an output circuit element 280 displays an input state in red, and an input circuit element 28i displays an input state in green. Accordingly, when input and output states are generated simultaneously, when there is no input, and when there is no output, they are displayed in yellow, red and green, respectively, therefore, the input and output states can be checked quickly.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a digital input/output status display method for displaying the input/output status of digital data handled by a computer, etc. The present invention relates to a digital input/output status display method that makes it possible to determine input/output status from the color generated from an element.

(Prior Art) In general, an industrial computer system reads data from a memory 1 as shown in FIG.
After being processed by the CPU (hereinafter referred to as CPU) 2, the processed data is provided to a process (e.g. relay) 5 through an internal bus 3 and an output circuit 4, and accordingly from a process (e.g. switch) 6 to an input circuit 7 and an internal bus 3. It has a digital input/output function that captures digital input data obtained through the digital input terminal and stores it in the memory 1. Such a data output system is usually called a readback system. In the figure, 8 is an input/output interface.

By the way, the above read pack system has memory 1. C
A method is used to compare digital input data with digital input data in the process of data processing performed by the computer itself such as PU2, but if the comparison results determine that there is an abnormality, the operator goes to the site and removes the abnormal card or other data. It is necessary to check the wiring etc. Therefore, in order to smoothly carry out such work such as inspection and investigation, a display device is provided near the site to display the output state of digital output data and the input state of digital input data.

FIG. 3 is a diagram showing the configuration of such a conventional display device.

This device includes a data latch circuit 11. Data output circuit 1
2 and output light emitting elements 13 corresponding to the number of output points that display the output state of digital output data output from the data latch circuit 11. ..., data input circuit 14. Input light emitting elements 16 corresponding to the number of input points displaying the input state of digital human input data output from the buffer circuit 15 and the data input circuit 14. It consists of...etc. 17 is a command line, 18 is a data bus, and 19 is a status read line. Therefore, this display device is provided with light emitting elements corresponding to the number of points that handle input and output, and lights up when there is input/output data, and turns off when there is no human output data.
The current data output status can be checked at a glance.

(Problem to be solved by the invention) However, in the above-described device, there is not much of a problem when the number of human output points is small, but when the number of input/output points increases, the output state of the output light emitting element and the input It takes a considerable amount of time to check the operating status of the light-emitting elements for
In addition, operators often misjudge their operating states, resulting in a lack of reliability.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a digital input/output status display method that enables quick and error-free checking of normal and abnormal input/output status.

[Structure of the Invention] (Means and Effects for Solving the Problems) The digital input/output status display method according to the present invention displays output side elements and Simultaneous digital input/output status is achieved by providing a pair of two-color light-emitting elements with input-side elements and displaying the digital output status and digital manual input status using different colors for the output-side element and the input-side element, respectively.

Only the digital output state and only the digital input state are displayed in different colors, and the digital input/output state can be immediately determined from the colors.

(Example) Hereinafter, an example of the apparatus of the present invention will be described with reference to FIG. In the figure, 21 is a data latch circuit that receives a command signal on a command line 22 sent from the CPU and latches data on a data bus 23. The latched data of this data latch circuit 21 is output to an output circuit 24. It is converted into the required signal and sent to the process side.

On the other hand, in the data human power system, the input circuit 2 converts the human power signal sent from the process into the required data.
5 and the digital human input data from this input circuit 25 are temporarily stored, and upon receiving the status signal 26, the data bus 23
A buffer circuit 27 etc. for outputting to the top is provided.

Furthermore, regarding the display of these digital input/output states, pairs are formed for each input/output point having a correspondence relationship with each other from the digital output line, for example, the output side of the data latch circuit 21, and the digital input line, for example, the output side of the input circuit 25. Color light emitting elements 28°... are provided. Then, one output element 2go of these two-color light emitting elements 28
displays the digital output status, and the other input element 2
8i is connected to display the digital input status,
Furthermore, the two elements 28o and 28i forming the pair are displayed in different colors. For example, one output element 28o emits red light during operation, and the other input element 281 emits green light during operation.

Therefore, according to the configuration of the embodiment as described above, when digital output data is output from a certain output point of the data latch circuit 21, the output element 280 of the two-color light emitting element 28 corresponding to the output point is red. This digital output data is then given to the process through the output circuit 24, and when the digital data is read back from this process through the input circuit 25, the input point corresponding to the output point is input. element 281 is displayed in green. As a result, if digital input and output states occur simultaneously,
Since the pixel elements 28o and 28i of the two-color light emitting element 28 are lit at the same time, the light emitting element 28 displays yellow, which is a combination of red and green. Therefore, the operator selects a large number of two-color light emitting elements 28 . ...If everything is yellow, it can be determined that the digital input/output status or process is normal.

On the other hand, if the corresponding digital input data is not returned from the process side even though digital output data has been output, the two-color light emitting element 28 will be displayed in red, so that color will immediately indicate that there is no input data. It can be determined that an abnormality has occurred in the part or system related to the relevant human output point of the process. Similarly, even though digital output data is not output, if digital input data is manually input from an input point corresponding to it, the two-color light emitting element 28 is displayed in green, so the color It can be immediately confirmed that an abnormality has occurred in the part or system corresponding to the relevant input/output point of the process.

Note that although the above embodiments are applied to processes, the application is not particularly limited as long as it is a lead pack system. Furthermore, the two-color light emitting element 28 is connected to the data latch circuit 21.
Although it is provided on the output side of the input circuit 25, it may be provided on any part as long as it is a digital turnout line. Also,
The colors of the two-color light emitting element 28 can be selectively used as appropriate.

In addition, the present invention can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As detailed above, according to the present invention, a two-color light-emitting element is provided for each input/output point in a corresponding relationship between digital input/output lines, and each is displayed in a different color when in the digital input/output state. As a result, it is possible to provide a digital input/output status display method that can quickly check whether the digital input/output status is normal or abnormal without error, thereby greatly shortening the checking time and reducing check errors at the same time.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a display device explaining one embodiment of the digital input/output status display method according to the present invention, Fig. 2 is a diagram explaining an overview of a readback system, and Fig. 3 is a diagram showing an example of a digital input/output status display method according to the present invention. FIG. 2 is a configuration diagram of a display device. 21...Data latch circuit, 24...Output circuit, 2
5... Input circuit, 27... Buffer circuit, 28...
・Two-color light emitting element, 28o...output element, 28i...
・Input element. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A two-color light-emitting element with a pair of an output side element and an input side element is provided for each input/output point that has a corresponding relationship between the digital output line and the digital input line, and the digital output state and the digital input state are determined by the output side element and the input side element, respectively. A digital input/output status display method characterized by displaying input-side elements in different colors.