JPH05297840A - Flat display device - Google Patents

Abstract

PURPOSE:To provide the flat display device which facilitates the clarification of a fault place by an event log analysis. CONSTITUTION:This flat display device is equipped with a memory 4 wherein previously generated fixed pictures and variable information corresponding to them are stored, a CPU 3 which takes a fixed picture to be displayed and the variable information corresponding to it out of the memory 4 in response to an instruction from a host computer 1 or touch screen 13, a display monitor 8 for displaying the fixed picture and corresponding variable information taken out of by the CPU 3, and an event processing means 11 for storing display update information in an event area memory 9 each time a display of the fixed picture and corresponding variable information is updated. Further, this device is equipped with an event simulating means for simulating the state at the time of the occurrence of an vent according to the display update information on the fixed picture and corresponding variable information stored in the event area memory 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat display device used for monitoring and controlling general industrial equipment.

[0002]

2. Description of the Related Art Generally, flat display devices are
The configuration shown in FIG. 7 is used. The memory 4 stores drawing data of hundreds of screens created by a drawing tool in advance, that is, a fixed screen and various tables for variable display for each screen. The screen number to be displayed is specified by the host computer 1 or the operator from the touch screen 13. Now, assuming that the screen number and the bit information and numerical information collected from inside or outside the host computer are received from the application program on the host computer 1 through the transmission control device 2, the CPU 3 specifies the screen switching. For example, the drawing data of the fixed screen corresponding to the designated screen number is read from the memory 4 and the graphic processor 5 is instructed to draw the graphic on the frame memory 6.

Further, various tables for variable display corresponding to the displayed screen numbers are read out, and based on this table, drawing data for flicker display of symbols depending on ON / OFF state of designated bits and designated numerical data are displayed. A graphic data is drawn on the frame memory 6 by instructing the graphic processor 5 to draw data for converting the current value into a level and converting it into a length and displaying the bar graph.

The graphic drawn in the frame memory 6 is displayed on the display monitor 8 by the video interface circuit 7.

In such a flat display device, an error log area memory 10 is often provided inside the device in order to facilitate error analysis when a trouble occurs.

The area memory 10 stores an error occurrence time, an error number, and an error occurrence count. this is,
This is to facilitate troubleshooting by referring to the error log area memory 10 later.

[0007]

By the way, an error may occur under a specific condition due to a hardware failure or a bug of internal firmware. With such an error, the error log can only understand the results such as general protection error and illegal command error.

In such a case, the operator does not know the progress of the error or the various internal states at that time, and what kind of operation the phenomenon occurs. There was a problem of spending time.

It is also conceivable to break the CPU 3 to stop the operation when an error occurs and investigate various variables on the memory 4 at that time. In most cases, the system cannot be stopped for a long time.

Therefore, in the present invention, in addition to the conventional error log, by providing an event log area memory and event processing means, it is possible to determine what kind of event processing is being executed when an error occurs or before. An object of the present invention is to provide a flat display device that can easily read out a factor when an error occurs by reading out.

Further, by reading the data in the event log area memory and adding an event simulation means for internally generating a similar event, it is possible to automatically perform a reproduction test and shorten the troubleshooting time. It is an object of the present invention to provide a flat display device according to the above.

[0012]

A flat display device according to the present invention displays a fixed screen created in advance and a memory for storing variable information corresponding to the fixed screen and an instruction from a host computer or a touch screen. CPU for retrieving a fixed screen and variable information corresponding thereto from a memory, a display monitor for displaying the fixed screen retrieved by this CPU and variable information corresponding thereto, and display update of the fixed screen and variable information corresponding thereto And event processing means for storing the display update information in the event area memory each time.

In addition to the above, there is provided an event simulation means for simulating the state at the time of occurrence of an event based on the fixed screen stored in the event area memory and the display update information of the variable information corresponding thereto. ..

[0014]

As a result, since the event data is stored, the contents of the event processing that was being executed at the time of the error occurrence or before that can be referenced later as a log, so the frequency of occurrence is low and the firmware that occurs under a specific condition It is easy to find the cause of hardware error.

Further, since the reproduction test based on the event data can be automatically carried out by the event simulation means, the reproduction test can be carried out quickly and accurately, and the cause of the error occurring under the specific condition can be easily searched. It can be carried out.

[0016]

EXAMPLE An example of the present invention will be described below. FIG. 1 is a block diagram of a flat display device of the present invention. The event log area memory 9 and the event processing means 11 are added to the conventional one shown in FIG.

FIG. 2 is a flow chart showing the operation of the CPU 3. If there is no error and it is operating normally, the screen drawing designation, bit information, and numerical information are received from the application program of the host computer 1 via the transmission control device 2 (S10). It is determined whether display is designated (S11). If there is a screen drawing designation, it is stored in the event log area 9 as a screen drawing event together with the screen number (S12).
In the CPU 3, as shown in FIG.
The fixed screen drawing data corresponding to the designated screen number is read from 1 and passed to the graphic processor 5 (S1).
3). Next, the CPU 3 retrieves various data for variable display, that is, variable information corresponding to the screen number from the tables 42, 43 and 44 of the memory 4 as shown in the figure (S14).

Then, it is determined whether or not all the variable information has been extracted (S15), and the type of the extracted variable information is determined (S16).

When the flicker display data is taken out from the table 44, ON / OFF of designated bit information is performed.
Depending on the state, the drawing data for flickering is transferred to the graphic processor 5 (S17), and stored in the event log area memory 9 as ON / OFF information as a flicker event (S18). Further, in the case of the numerical value display data of the table 43, since the variable numerical value display is designated, the data for converting the designated numerical value into a character code and rendering the character is passed to the graphic processor 5 (S1).
9), it is stored in the event log area memory 9 together with a numerical value as a variable numerical value display event (S20). If the bar graph display data of the table 42 is designated, the designated numerical value is converted into the length and the data for drawing the bar graph is passed to the graphic processor 5 (S21),
It is stored in the event log area memory 9 together with a numerical value as a bar graph display event (S22). Then, the drawing data is transferred to the graphic processor 5 (S23).

On the other hand, when a screen drawing designation or designation of variable information such as bit information is received from the touch screen 13, an interrupt occurs (S24). The CPU 3 inputs the coordinates of the screen position designated by the touch screen 13 (S2
5), as shown in FIG. 3, the data of the touch section attribute table 45 in the memory 4 is taken out (S26). It is determined whether or not the coordinates of the position designated by the touch screen 13 match (S27). If they match, the event log area memory 9 stores the touch event and the coordinates thereof (S28).

Then, it is judged whether or not there is a screen display designation in the information of the coordinate position (S29), and if there is a screen display designation, the process proceeds to the above-mentioned step S12.

Upon receiving the drawing data, the graphic processor 5 decodes the drawing data and draws it. Frame memory 6
The graphic drawn on the screen is displayed on the display monitor 8 by the video interface circuit 7.

As a result, in comparison with the conventional method, the processing of storing the event type and related parameters in the event log area is newly added to the normal processing as the processing of the CPU 3 (S12, S1).
8, S20, S22, S28) increases, but the storage process is generally within a few μs, and the display performance is hardly affected.

Next, an example of analysis in the case where an error occurs in the CPU 3 while repeating such operations will be described.

FIG. 4 shows the internal formats of the event log area memory 9 and the error log area memory 10.

When the collected error log is examined, time 1
A numerical operation error occurs at 0:50, and by referring to the related information, it can be known from which address the program module occurred.

Next, when investigating the collected event log and investigating several events before the time when the error occurred, the screen number which was displayed at that time, the variable display event which seems to be the cause of the error and the numerical value at that time Understand.

From this result, it can be inferred that there is a problem in the variable numerical value display processing, and if necessary, a reproduction test is possible.

As described above, according to this embodiment, when an error occurs, the error log and the event log are referred to,
By investigating, it becomes very easy to troubleshoot hardware errors and firmware bugs that occur under specific conditions that rarely occur.

Next, FIG. 5 shows another embodiment of the present invention. In addition to the above embodiment, the event simulation means 1
2 is added. Since the operation of the CPU 3 including the operation of the event processing means 11 is the same as that of the above-described embodiment shown in FIG. 3, the operation of the event simulation means 12 will be mainly described.

It is assumed that an error occurs on the CPU 3 when the operation shown in FIG. 3 is repeated without any error occurring. Then, consider the case of analyzing the cause of the error occurrence. In this case, the event simulation means 12 is activated.

FIG. 6 is a flowchart showing the operation of the event simulating means 12. When the event simulating means 12 is activated, it is first determined whether or not all the event logs have been extracted from the event log area memory 9 (S1). .. If there is an event log that has not been extracted in the event log area memory 9, one event is extracted from the event log area memory 9 (S2).

Then, the type of event is judged (S
3) For example, if the screen is switched from the host computer, first, the event processing means 11 is activated as a fixed screen drawing event together with the screen number (S4). Similarly, in the case of a numerical value display event, the event processing means 11 is started together with the input data in the event log (S5), and in the case of a bar graph event, the event processing means 11 is started together with the input data in the event log (S6), and the flicker. If it is a display event, the event processing means (S7) is activated together with the input data in the event log.

In this way, by sequentially taking out and activating the event processing means 11, it is possible to reproduce the situation at the time of occurrence of a defect.

This operation is performed by the event simulation means 1 if necessary.
By starting 2, it is possible to reproduce it again and again.

As a result, the reproduction test is accurately performed in a short time, and the time required for failure analysis is greatly shortened.

As described above, according to this embodiment, the event simulation means for simulating the event log is provided to reproduce the situation at the time of failure, so that the reproduction test can be performed more accurately and in a shorter time as compared with the manual reproduction test. It becomes possible to carry out, and it becomes very easy to troubleshoot due to a hardware error that occurs under a specific condition that rarely occurs, or a firmware bug.

[0038]

As described above, according to the present invention, the event log area memory is provided in addition to the conventional error log area memory, and the event log is recorded by the event processing means. It is possible to shorten the time required for clarification of the internal failure point, and consequently improve the reliability of the flat display device.

Further, by providing the event log simulating means, it is possible to shorten the time for clarifying the trouble of the event processing means, and consequently improve the reliability of the flat display device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the CPU including the operation of the event processing means.

FIG. 3 is an explanatory diagram of a table in memory.

FIG. 4 is an explanatory diagram of an error log area memory and an event log area memory.

FIG. 5 is a flow chart configuration diagram showing another embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the event simulation means.

FIG. 7 is a block diagram showing a conventional example.

[Explanation of symbols]

 1 Host Computer 2 Transmission Control Device 3 CPU 4 Memory 5 Graphic Processor 6 Frame Memory 7 Video Interface Circuit 8 Display Monitor 9 Event Log Area 10 Error Log Area 11 Event Simulation Program 12 Event Processing Program 13 Touch Screen 41 Fixed Screen Drawing Data 42 Bar Graph display attribute table 43 Numerical value display attribute table 44 Flicker display attribute table

Claims (2)

[Claims] 1. A memory for storing a fixed screen created beforehand and variable information corresponding to the fixed screen, and the fixed screen to be displayed according to an instruction from a host computer or a touch screen and the variable information corresponding to the fixed screen. A CPU for taking out from the memory, a display monitor for displaying the fixed screen and the variable information corresponding thereto fetched by the CPU, and the display update information for each display update of the fixed screen and the variable information corresponding thereto. A flat display device, comprising: an event processing means for storing in an event area memory. 2. A memory for storing a fixed screen created beforehand and variable information corresponding to the fixed screen, and the fixed screen to be displayed according to an instruction from a host computer or a touch screen and the variable information corresponding to the fixed screen. A CPU fetched from the memory, a display monitor for displaying the fixed screen and variable information corresponding thereto fetched by the CPU, and a display update information event for each display update of the fixed screen and variable information corresponding thereto. Event processing means for storing in the area memory, and event simulating means for simulating the state at the time of occurrence of the event based on the display update information of the fixed screen and corresponding variable information stored in the event area memory And a flat display device characterized by Place