JP3031888B2 - Display device - Google Patents

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 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. 2, a display device 14 according to the present invention has a control system such as a PLC 10.
The display is connected to a device , and a display corresponding to the control state of the control device is performed on the display screen 26.

According to the present invention, each time a detection operation corresponding to a preset condition is performed, summary data for uniquely specifying the detection content is displayed in a time-sequential list format as shown in FIG. screen 26 thereby enabling the display on, in conjunction with the instruction operation for each outline data displayed, the designated summary data to display the corresponding detailed data screen 2
6 that it is displayed on.

[0008] During detail data described above, with including still image of the captured predetermined position at the time when the detection operation corresponding to the designated summary data was performed, small
At least until specific summary data is indicated
A moving image showing the current status of the location can be displayed on the screen
Noh .

At this time, a list display of the summary data described above is performed.
And the moving image display automatically
It is preferable that the process be performed in a targeted manner .

[0010]

As described above, according to the present invention, the summary data corresponding to the detected contents in the control device is displayed in the form of a list, and when a specific summary data is designated, the corresponding detail is displayed. by displaying data at the same time, display corresponding to the detected contents Ru performed accurately.

[0011]

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 of the display devices 14 is connected to a host computer 18 via a network line 16 via a LAN, and has a common communication protocol with the host computer 18. To enable the transfer of various data.

Further, the memory capacity provided for each display device 14 is suppressed to a necessary minimum, while the data taken in through the display device 14 is automatically transmitted to the host computer 18 via the network line 16 at regular time intervals, for example. 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.

Each of the display devices 14 has 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.

Further, as 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 the display screen 26 is brought into close contact with the display screen 26. 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 generated 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, a switch-on operation 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 out 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. The file number of the base screen on which the display control operation is to be executed, the tag name for specifying the operation content to be executed on the base screen, 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 used frequently, 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 data is displayed on the detailed information display screen 54, and the still image is displayed on the image information display screen 48 using the processing instruction word.

The processing instruction word for image display is to open an image information display screen 48 on coordinates set in advance and display an image corresponding to a file number written at an 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, in the above-mentioned history information display processing instruction word, the data processing content to be executed in response to the data specification of the specific line is written, for example, by writing data to a set address in the image information display processing instruction word. By doing so, a still image having the content corresponding to the specified general information is selectively displayed on the image display screen, instead of displaying the moving image, in conjunction with the operation of selecting the history information.

The processing instruction word for displaying the detailed information opens the detailed information display screen 54 on the coordinates set in advance, and displays the text file corresponding to the file number set as the reference information 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 history information acquisition step 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, when the system is started or terminated, 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 predetermined 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 sight by blinking of 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 can be displayed. 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 / 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 in accordance with 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 that displays 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.

The method of displaying the detailed information also includes, in advance, the detailed information corresponding to the keyword in the message instead of displaying it in conjunction with the designation of 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

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-28379 (JP, A) JP-A-5-166086 (JP, A) JP-A-6-44483 (JP, A) JP-A 8- 110992 (JP, A) JP-A-10-188183 (JP, A) JP-A-11-119825 (JP, A) JP-A-11-195184 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G06F 3/00 655 G05B 23/02 301 G08B 23/00 G09G 5/00

Claims (3)

(57) [Claims] (1)ForecastDetection action corresponding to the set conditions
Each time it is performed, a summary data that uniquely identifies the detection content
Data in the form of a list over timedisplayIf it can be displayed on the screen
Both are linked with the instruction operation for each displayed summary data.
The detailed data corresponding to the specified summary data.
IsdisplayDisplayed on the screenA display device, The detailed data mentioned above includes
Take a picture of a predetermined point at the time when the corresponding detection operation is performed.
Including the still image At least until specific summary data is indicated
A moving image showing the current situation at the location
Can be displayed on Display device. 2. A summary display of the above-mentioned summary data and a moving image
Is automatically displayed in conjunction with the detection of an error.
The display device according to claim 1, wherein: (3)Connected to a predetermined control device, the control device
To send and receive information to and from the
A display device that performs a corresponding display on the screenAndMultiple references identifying specific actions to be performed
Form a set of processing directives within a series of actions to be controlled.
A plurality of processing instruction words are stored in advance in accordance with the
, Decodes the stored processing instruction word, and responds to the decoded contents.
Control means for performing a control operation, The above-mentioned control device corresponds to the preset conditions.
Each time a detection operation is performed, the content of the detection is uniquely specified.
Storage means for capturing summary data A video camera arranged near the control target in the control device
Image processing means for processing an image input from the camera.
e, The above-mentioned storage means further stores general data.
Still image information captured from the video camera at the time
Information and character information stored in advance corresponding to the summary data.
Information is stored at least, The processing instruction words executed by the control means described above include: Displayed on the display screen in conjunction with the execution of the specified detection operation
Open the history information display screen, and on the history information display screen
The summary data stored in the storage unit is displayed in a list over time.
A processing instruction word that can be displayed by an expression, For specific summary data on the history information display screen
Screen for displaying detailed information in conjunction with the instruction action
Open the specified summary on the detailed information display screen.
A processing instruction for displaying character information corresponding to the data, When the history information display screen is opened on the display screen,
To open the image information display screen on the display screen,
Video captured from the video camera on the information display screen
Is displayed, while a specific outline on the history information display screen is displayed.
In conjunction with the designation of the summary data, the designated summary data
Processing to display a still image corresponding to data in place of a moving image
It is characterized by including a descriptive word Display device.