JP2000148331A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a program-type display device, which can make a display corresponding to the control state of a PLC, to accurately make a display corresponding to a detected abnormality and prevent an operator from setting confused right after an abnormality occurs, and to make easily graspable the cause of the abnormality and countermeasures in its early states. SOLUTION: Outline data corresponding to the contents of abnormality detection of the PLC are displayed in a list form on a screen 52 for history information display in time series and when a specific piece of outline data are instructed on the screen, detailed data including the reason for the abnormality and countermeasures are displayed in text form on a screen 54 for detailed information display and also displayed as a still image on a screen 48 for image information display.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program type display device capable of displaying an alarm history generated in a control device such as a PLC.

[0002]

2. Description of the Related Art Conventionally, this type of alarm history display simply shows a history of alarm occurrence in a time-series manner by listing the contents of the alarms on a display screen in a line-by-line order. Things were common.

[0003]

However, in the method of displaying the alarm occurrence state by the above-described list display, the flow of the control abnormality with time can be grasped as a whole, but, in particular, the abnormal part overlaps at the same time. If this occurs, the operator is in a panic state, and there is a high possibility that the situation will be worsened because a calm decision cannot be made.

As a result of studying the above problem, the present inventor has made it possible, when the above-mentioned alarm history is displayed, to directly indicate the contents of the history display on the screen, and to provide detailed information on the abnormality. It has been found that the above problem can be solved at once by displaying information on the same display screen.

[0005] The present invention has been made based on such knowledge, and in addition to displaying the general information, the detailed information corresponding to the specific general information can be displayed at the same time. It is an object of the present invention to provide a display device capable of accurately performing the process and preventing a delay in response.

[0006]

As shown in FIG. 1, a display device 14 according to the present invention is configured such that each time a detection operation corresponding to a condition set in advance is performed, a schematic data for uniquely specifying the detection content. And display in the form of a list over time on the display screen 26. Further, in conjunction with the instruction operation for each displayed outline data, the detailed data corresponding to the instructed outline data is displayed on the same display. This is displayed on the screen 26.

Further, the detailed data includes at least character information stored in advance corresponding to the outline data, and still image information obtained by imaging a predetermined location at the time when the indicated outline data is stored. In addition, the character information and the still image information described above are simultaneously displayed on the same display screen 26.

The above-mentioned still image information stores a moving image output from a video camera 42 disposed at a detection point as a still image in response to the detection operation, as shown in FIG. Is preferred.

A display device 14 is connected to a predetermined control device such as a PLC 10 for transmitting and receiving information to and from the control device, and displaying on the display screen 26 a display corresponding to the transmitted and received information. Thus, a set of processing instruction words is formed from a plurality of pieces of reference information that specify individual operation contents to be executed, and a plurality of sets of the processing instruction words are stored in advance corresponding to a series of operation contents to be controlled. A control means for decoding the stored processing instruction word and performing a control operation corresponding to the decoded content, and each time a detection operation corresponding to a preset condition is performed in the above-described control device, the detection content is uniquely specified. Storage means for fetching outline data to be processed, and image processing means for processing an image input from a video camera 42 disposed near a control target of the control device.

In this case, the storage means further stores at least the still image information captured from the video camera 42 at the time when the general data is captured, and the character information stored in advance corresponding to the general data. Is stored.

The processing instruction words executed by the control means include a history information display screen 52 on the display screen 26, and the schematic data stored in the storage means on the history information display screen 52. Is displayed in the form of a list over time, and in conjunction with an instruction operation for specific general data on the history information display screen 52, the display screen 2
6, a processing instruction word for displaying the character information corresponding to the specified outline data on the detailed information display screen 54, and an image information display screen on the display screen 26. 48, and the image information display screen 4
8, a processing instruction word for displaying the still image information corresponding to the instructed outline data.

[0012]

As described above, according to the present invention, the summary data corresponding to the detection contents of the control device is displayed in a list form, and when the specific summary data is designated, the detailed data including the still image corresponding thereto is displayed. By simultaneously displaying on the same display screen, a display corresponding to the detected content is accurately performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 4, the present invention relates to a control system in which a plurality of PLCs 10 provided as a control device are linked to each other to enable sequence control of a target system 12. The present invention will be described based on an example implemented on a program type display device 14 used as a control panel for use in the present invention. However, the present invention is not limited to this. Needless to say, it can be carried out in substantially the same manner.

As shown in FIG. 2, each display device 14 is connected to a host computer 18 via a network line 16 via a LAN, and a common communication protocol with the host computer 18 is provided. To enable the transfer of various data.

Further, while the memory capacity provided for each display device 14 is minimized, the data fetched through the display device 14 is automatically transmitted to the host computer 18 via the network line 16, for example, at regular time intervals. Alternatively, by setting the data to be sent manually by using a predetermined command, the host computer 18 is configured to make the data sent from all the display devices 14 into a database so that unified data management can be performed. The display device 14 is also configured so that necessary data can be extracted from the host computer 18 at appropriate times and displayed on the display screen 26 of each display device 14.

The display devices 14 have substantially the same configuration.
By directly connecting to the PLC 10 via the dedicated communication line 20 to enable data communication using a communication protocol depending on the model of the PLC 10, while enabling sequence control of the target system 12 by the connected PLC 10, Used as a control panel in the PLC 10.

As further illustrated in FIG. 3, a display screen 26 using, for example, a liquid crystal display device as a display 24 is disposed on the front side of the substantially rectangular main body case 22, and is attached to the display screen 26 so as to be in close contact with the touch panel. The display control circuit 30 is housed inside the main body case 22 while the
The display corresponding to the control state of the LC 10 is performed, and at the same time, the data input by the fingertip via the touch panel 28 and the control of the PLC 10 are enabled. Further, in the pointing operation by the fingertip on the display screen 26 via the touch panel 28, the pointing coordinates and the pointing time are analyzed by the touch panel controller 29 and used for data processing.

The display control circuit 30 is basically substantially the same as a personal computer as shown in FIG.
2, a CPU 34, various memories 36 or a graphic controller 38 are connected. The result of data processing by the CPU 34 is developed on the video RAM 40 via the graphic controller 38, and the corresponding contents are displayed on the display screen 26 of the display 24. Is displayed.

In this embodiment, the video camera 4
2 is arranged corresponding to a place where constant monitoring is required, such as a control point in the target system 12, and a display control circuit 30 via a predetermined video processing circuit 44.
1 and 3, an image display corresponding to the control state is displayed on an image information display screen 48 opened on the display screen 26 as shown in FIGS. I can do it.

In addition, a PLC is used by using a processing instruction word described later.
The control state at 10 is constantly monitored. For example, when a control abnormality such as a tank level or temperature exceeding the upper limit value occurs, it is connected to the PLC 10 that the set conditions are satisfied even during a normal operation. When the detected sensor 50 detects, the detected contents are sequentially stored in the memory 36 as history information. Furthermore, an image corresponding to the point of occurrence of the history information is captured as a still image, and data is stored in association with the history information.

Here, the processing instruction word used for the display control operation in the display device 14 is, for example, an operation of turning on a switch via a touch panel to be subjected to data processing on the display screen 26 or a screen display of numerical values and characters. Each of the data processing functions serving as a basic unit is specified by a tag name. By setting one or a plurality of processing directive words on the display screen 26, necessary function operations are displayed on the display screen 2.
6 can be easily realized.

Further, a plurality of unit screens constructed as described above are provided in one program type display device 14 for data processing, and a different file number is designated for each unit screen. By simply switching the unit screen, a screen displaying necessary operation contents can be obtained.

On the other hand, the display control circuit 30 reads a processing instruction word set on the opened unit screen every predetermined short time and performs a corresponding data processing, thereby performing a necessary data processing operation. I'm trying to be.

The basic structure of the processing instruction word is substantially the same, and includes a file number of a base screen on which a display control operation is to be executed, a tag name for specifying an operation content to be executed on the base screen, and Reference information including one or a plurality of data referred to for each execution event is provided as one set.

Further, more advanced functions can be configured by combining a plurality of basic processing instructions described above. For functions that are frequently used, such as display of history information and display of video images, Corresponding processing instruction words are combined into one to form a generalized processing instruction word, or a dedicated processing instruction word is defined.

That is, the processing instruction word for displaying the history information is:
The history information stored in the predetermined address area can be displayed in a list one line at a time corresponding to the setting position of the processing instruction word on the base screen. The cursor 56 can be moved and confirmed using the 56, or can be specified by a direct touch operation of the corresponding line with a fingertip, and a predetermined data processing such as described later is performed on the specified data. It is configured to be performed in cooperation.

As shown in FIG. 1, the contents displayed on each line in the history information display screen 52 include data specifying the time of occurrence of the corresponding event, confirmation of the operator, or recovery of the system. The information that uniquely identifies the detection history, such as the message data corresponding to the contents described above or the detection value at that time, is preset so that it can be selected as reference information.

On the other hand, the contents of data processing performed at the same time as selecting and instructing each line listed on the history information display screen 52 include detailed character information corresponding to the specified outline data and the outline data. The still image information is displayed on the detailed information display screen 54, and the still image information is displayed on the image information display screen 48 using the processing instruction word.

The processing instruction word for image display is to open the image information display screen 48 on coordinates set in advance and to enable display of an image corresponding to the file number written at the address set as reference information. is there. Furthermore, if the file number written in the set address is a value that exceeds the set range, for example, the moving image sent from the video camera 42 is directly displayed, but if the file number is within the set range, the still image specified by the file number is displayed. The image is set to be displayed.

Therefore, the data processing contents to be executed in response to the data designation of the specific line in the processing instruction word for displaying the history information described above are written, for example, at the set address in the processing instruction word for displaying the image information. By doing so, a still image having the content corresponding to the specified general information is selectively displayed on the image information display screen 48 instead of displaying the moving image in conjunction with the selection operation of the history information.

The processing instruction word for displaying the detailed information is displayed on the detailed information display screen 54 on the coordinates set in advance, and the text file corresponding to the file number set as the reference information is displayed on the detailed information display screen 54. Can be displayed. The file number is uniquely associated with the message content in the history information, and the text content specified by the file number includes detailed information such as the cause of the abnormality occurrence and a coping method.

In this embodiment, the acquisition step of the history information is further divided into, for example, first to third steps.
The first stage defines the stage during normal operation, the second stage defines the stage that is not enough to stop the system but has a possibility of becoming abnormal, while the third stage limits the problem if left unchecked. Target system 1
A limit value for discriminating each stage is set with respect to the detection value of the sensor 50 in 2.

Here, in the above-mentioned first stage, it is necessary to set in advance the time when a special event occurs, for example, at the time of starting or ending the system or when the operating conditions are changed. The minimum data is collected, the image at that time is captured as a still image, and recorded in association with the time at which the data was obtained or with numerical data.

Further, when the detected value enters the second stage,
Numerical data is fetched at regular intervals at shorter time intervals than the first stage, or at set timings such as when the increase or decrease rate of the measured value exceeds the set value.
Still images at each point in time are captured.

When it is determined that the measured value has exceeded the value indicating the abnormality and has reached the third stage, numerical data and still image data in a preset time range before and after that are stored, and the system is reset. While the emergency stop is performed, the display screen 26 is forcibly switched to a unit screen for displaying history information.

In the unit screen for displaying the history information, the third-stage recording data recorded during the above-described abnormality detecting operation and the second or first recording data as required by selection.
The record data of the stage is displayed on the history information display screen 52 as 1
A list is displayed by displaying one or several lines for each data item.

At the same time, a display that appeals to the sense of hearing by a buzzer or the like or a display that appeals to the sense of sight by blinking a lamp is made, and the image sent from the video camera 42 is automatically displayed on the image information display screen 48. Then, the current situation at the site where the abnormality has occurred is displayed in real time. This image is remotely operated in accordance with an instruction on the display screen 26, and the situation at an arbitrary location around the image is displayed in an up or telephoto manner.

Further, when individual data listed in the list is designated via the touch panel 28, a still image recorded simultaneously with the collection of the data is displayed on the image information display screen 48.
In addition to being displayed on the top, the countermeasures for the abnormality and the details of the cause of the abnormality are displayed on the detailed information display screen 54, so that not only the status leading to the abnormality can be confirmed as history information, but also images and detailed descriptions It can be intuitively confirmed by using it.

In the above-described embodiment, an example has been described in which one screen is divided into a plurality of screens and the history information and the detailed information are simultaneously displayed on the assumption that the display screen 26 is relatively large. The present invention is not limited to this, and it is also possible to enable switching display while displaying each display screen 26 on the entire surface, or to superimpose and display each other.

The reference information in the processing instruction word for displaying the history information includes the number of display lines of the summary data on the history information display screen 52, the display interval, the presence or absence and shape of the cursor, the items displayed on one line, The method can be implemented by appropriately increasing or decreasing the contents to be referred to, such as a method of instructing summary information, a storage address and a storage method of data displayed on the detailed information display screen 54 when the summary information is selected.

For example, an offset value can be set to a file number or an address where detailed information is stored, and the offset value is changed according to a difference between unit screens or an alarm occurrence state, so that the same history display can be performed. It is also possible to display detailed information of different contents.

Further, the data displayed on the history information display screen 52 is not limited to the one displaying the abnormal state corresponding to the outline data of the third stage as described above, but may be the second or first data.
Stage data can also be displayed simultaneously or selectively. In addition, it is preferable that the display is configured so that the data can be sorted and displayed not only in the order of occurrence but also in each selected condition such as the place of occurrence.

Also, the detailed information display method is such that detailed information corresponding to a keyword in a message is provided in advance, instead of displaying it in conjunction with designating one line of the history information display screen 52. Necessary data display may be performed in response to a keyword instruction. Further, the method of specifying the display data can of course be appropriately changed to a pointing device such as a mouse, a keyboard, or the like in place of the instruction of the fingertip on the touch panel 28. Furthermore, instead of or in addition to displaying text data as detailed information, figures and animations including graphs and photographs can be displayed, and text content can be read aloud by voice synthesis.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing a basic configuration of the present invention.

FIG. 2 is an overall block diagram showing an example in which the present invention is applied to a control system.

FIG. 3 is a front view showing an example of a programmable display device.

FIG. 4 is a block diagram specifically illustrating an example of an electrical configuration.

[Explanation of symbols]

 10 PLC 12 Target System 14 Display Device 16 Network Line 18 Host Computer 20 Communication Line 22 Body Case 24 Display 26 Display Screen 28 Touch Panel 29 Touch Panel Controller 30 Display Control Circuit 32 Bus Line 34 CPU 36 Memory 38 Graphic Controller 40 Video RAM 42 Video Camera 44 image processing circuit 46 image signal 48 image information display screen 50 sensor 52 history information display screen 54 detailed information display screen 56 push button switch 58 cursor

Claims (3)

[Claims] 1. Every time a detection operation corresponding to a condition set in advance is performed, outline data for uniquely specifying the detection content is stored, and can be displayed on a display screen in a time-series list format. A display device in which detailed data corresponding to the indicated outline data is displayed on the same display screen in conjunction with an instruction operation for each displayed outline data. In addition to at least character information stored in advance corresponding to the data and still image information obtained by capturing an image of a predetermined location at the time when the designated outline data is stored, the character information and the still image information , Displayed simultaneously on the same display screen. 2. The display device according to claim 1, wherein the still image information stores a moving image output from a video camera disposed at a detection location as a still image in response to a detection operation. . 3. A display device connected to a predetermined control device for transmitting and receiving information to and from the control device and for displaying on the display screen a display corresponding to the transmitted and received information, the display device comprising: A plurality of sets of processing directives are configured from a plurality of pieces of reference information that specify the operation details of the processing instruction, and a plurality of sets of the processing directives are stored in advance corresponding to a series of operation details to be controlled, and the stored processing directives are stored. A control unit that decodes the data and performs a control operation corresponding to the decoded content; and a storage unit that captures general data that uniquely specifies the detected content every time a detection operation corresponding to a preset condition is performed in the control device described above. Means, and an image processing means for processing an image input from a video camera disposed near a control target in the control device, wherein the storage means further comprises: At least still image information captured from the video camera and character information stored in advance corresponding to the outline data are stored, and the processing instruction words executed by the above-described control means include: Open the history information display screen, and on the history information display screen, a processing instruction word that enables the summary data stored in the storage unit to be displayed in the form of a list over time, and a specific instruction on the history information display screen. A processing instruction word for opening a detailed information display screen on the display screen in conjunction with the instruction operation on the outline data, and displaying character information corresponding to the indicated outline data on the detailed information display screen, and a display screen A table for opening a screen for displaying image information, and a processing instruction word for displaying still image information corresponding to the specified outline data on the screen for displaying image information. Apparatus.