JP3590553B2 - Display device and control system provided with the display device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a programmable display device capable of displaying an alarm history generated in a control device such as a PLC.
[0002]
[Prior art]
Conventionally, this type of alarm history display generally shows the history of alarm occurrences simply in chronological order by displaying the contents of the alarms in a line-by-line order on the display screen in the order in which the alarms occurred. there were.
[0003]
[Problems to be solved by the invention]
However, the method of displaying the alarm occurrence state by the list display as described above allows the flow of the control abnormality over time to be grasped as a whole. Is likely to panic and make things worse without a calm decision.
[0004]
As a result of studying the above problem, the present inventor has made it possible, when the above-described alarm history is displayed, to directly indicate the contents of the history display on the screen and to provide the same detailed information on the abnormality. It has been found that the above problem can be solved at once by displaying on the display screen.
[0005]
The present invention has been made on the basis of such knowledge, and in addition to displaying the general information, the detailed information corresponding to the specific general information can be simultaneously displayed, so that the data display at the time of occurrence of the abnormality can be accurately performed. It is an object of the present invention to provide a display device which can be implemented and can prevent a delay in response.
[0006]
[Means for Solving the Problems]
The display device 14 according to the present invention stores, as illustrated in FIG. 1, each time a detection operation corresponding to a preset condition is performed, stores schematic data that uniquely specifies the detection content, and displays a list over time. The detailed data corresponding to the indicated schematic data is displayed on the same display screen 26 in conjunction with the instruction operation for each displayed outline data. is there.
[0007]
Further, the above detailed data includes at least character information stored in advance corresponding to the outline data, and at least still image information of a predetermined location at the time when the indicated outline data is stored, and The character information and the still image information are simultaneously displayed on the same display screen 26.
[0008]
As the above-described still image information, as illustrated in FIG. 2, it is preferable that a moving image output from the video camera 42 disposed at the detection location is stored as a still image in response to the detection operation.
[0009]
The display device 14 is connected to a predetermined control device such as the PLC 10, transmits and receives information to and from the control device, and performs a display corresponding to the transmitted and received information on the display screen 26. A set of processing instruction words is formed from a plurality of pieces of reference information that specify individual operation contents to be controlled, and a plurality of processing instruction words corresponding to a series of operation contents to be controlled are stored in advance and stored. Control means for decoding the processing instruction word and performing a control operation corresponding to the decoded content, and schematic data for uniquely specifying the detected content each time a detection operation corresponding to a preset condition is performed in the control device described above. May be provided, and an image processing means for processing an image input from the video camera 42 disposed near the control target of the control device.
[0010]
In this case, the storage means further stores at least still image information captured from the video camera 42 at the time when the summary data is captured, and character information previously stored corresponding to the summary data. .
[0011]
In addition, the processing instruction words executed by the above-described control means include opening a history information display screen 52 on the display screen 26 and displaying the outline data stored in the storage means on the history information display screen 52 with time. A detailed information display screen 54 is opened on the display screen 26 in conjunction with a processing instruction word that can be displayed in a simple list format and an instruction operation for specific summary data on the history information display screen 52, and the detailed information display is performed. A processing instruction word for displaying character information corresponding to the specified outline data on the display screen 54, and an image information display screen 48 is opened on the display screen 26, and an instruction is given on the image information display screen 48. And a processing instruction word for displaying still image information corresponding to the outline data.
[0012]
【The invention's effect】
As described above, the present invention displays the outline data corresponding to the detection content in the control device in a list format, and when a specific outline data is specified, the detailed data including the corresponding still image is displayed on the same display screen. At the same time, the display corresponding to the detected content is accurately performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, as shown in FIGS. 1 to 4, the present invention is used as a control panel for each PLC 10 in a control system in which a plurality of PLCs 10 provided as control devices 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 the program-type display device 14. However, the present invention is not limited to this, and can be implemented in a similar manner for various personal computer application devices using the display device 14 alone or having a display function. Of course.
[0014]
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 various display devices 14 are connected to the host computer 18 using a common communication protocol. Enables data transfer.
[0015]
Further, while the memory capacity provided for each display device 14 is suppressed to a necessary minimum, data taken in through the display device 14 is transmitted to the host computer 18 via the network line 16 automatically, for example, at predetermined time intervals, or at a predetermined time interval. Is set so as to be sent manually by using the command of the host computer 18 so that the data sent from all the display devices 14 is made into a database so that the data can be centrally managed, and at the same time, each display device 14 In such a case, necessary data is taken out from the host computer 18 at an appropriate time and displayed on the display screen 26 of each display device 14.
[0016]
Each of the display devices 14 has substantially the same configuration, and is directly connected to the PLC 10 via a dedicated communication line 20 to enable data communication using a communication protocol depending on the model of the PLC 10. The target system 12 is used as a control panel in the PLC 10 by enabling sequence control.
[0017]
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 a touch panel 28 is disposed in close contact with the display screen 26. On the other hand, by housing the display control circuit 30 inside the main body case 22, a display corresponding to the control state of the PLC 10 is displayed on the display screen 26, and at the same time, data input by a fingertip via the touch panel 28 and the PLC 10 side Can be controlled. Further, the pointing operation of the fingertip on the display screen 26 via the touch panel 28 is analyzed by the touch panel controller 29 at the pointing coordinates and the pointing time, and used for data processing.
[0018]
The display control circuit 30 is basically the same as a personal computer as shown in FIG. 4, and is connected to a CPU 34, various memories 36, or a graphic controller 38 via a bus line 32. Are developed in the video RAM 40 via the graphic controller 38, and the corresponding contents are displayed on the display screen 26 of the display 24.
[0019]
In this embodiment, the video camera 42 is further arranged so as to correspond to a place requiring constant monitoring, such as a control point in the target system 12, and a display control circuit is provided via a predetermined video processing circuit 44. By taking in a video signal 46 output from the video camera 42 into the image display 30, an image display corresponding to the control state is displayed on an image information display screen 48 opened on the display screen 26 as illustrated in FIGS. I can do it.
[0020]
In addition, the control state of the PLC 10 is constantly monitored by using a processing instruction word described later, and the setting is performed not only when a control abnormality such as a tank level or a temperature exceeding an upper limit value occurs, but also during a normal operation. When the sensor 50 connected to the PLC 10 detects that the condition is satisfied, the detected content is 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 correspondence with the history information.
[0021]
Here, the processing instruction word used for the display control operation in the display device 14 is a basic unit such as a switch-on operation via a touch panel or a screen display of numerical values or characters to be subjected to data processing on the display screen 26. Each of the data processing functions is specified by a tag name. By setting one or a plurality of processing directives on the display screen 26, necessary function operations can be easily realized on the display screen 26. It is assumed that.
[0022]
Further, in one program type display device 14, a plurality of unit screens configured as described above are provided for data processing, and a different file number is designated for each unit screen. By simply switching, a screen displaying necessary operation contents can be obtained.
[0023]
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 so that a necessary data processing operation is performed. ing.
[0024]
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, and the execution event And one set of reference information composed of one or a plurality of pieces of data referred to.
[0025]
Furthermore, since more advanced functions can be configured by combining a plurality of basic processing instructions described above, functions that are used frequently, such as display of history information and display of video images, require corresponding processing. A set of instruction words is combined into one to form a generalized processing instruction word, or a dedicated processing instruction word is defined.
[0026]
That is, the processing instruction word for displaying the history information is such that the history information stored in the predetermined address area can be displayed in a list state, one line at a time, corresponding to the setting position of the processing instruction word on the base screen. Further, each row can be moved and confirmed by using the push button switch 56 to move and confirm the cursor 58, or can be specified by a direct touch operation of the corresponding row by a fingertip, and the specified data can be specified. On the other hand, predetermined data processing described later is performed in cooperation.
[0027]
As shown in FIG. 1, the contents displayed on each line of the history information display screen 52 include the time when the corresponding event occurs, the data for identifying the operator or when the system is restored, Information that uniquely identifies the detection history, such as corresponding message data or the detected value at that time, is preset so that it can be selected as reference information.
[0028]
On the other hand, the data processing performed at the same time as selecting and instructing each line listed on the history information display screen 52 includes detailed character information corresponding to the specified summary data, and static information at the time when the summary data is generated. Image information is included, character information is displayed on the detailed information display screen 54, and still image information is displayed on the image information display screen 48 using a processing instruction word.
[0029]
The processing instruction word for image display opens the image information display screen 48 on coordinates set in advance, and enables display of an image corresponding to a file number written at an address set as reference information. Further, when the file number written in the set address is, for example, a value exceeding the set range, the moving image sent from the video camera 42 is directly displayed, but for the file number in the set range, the still image specified by the file number is displayed. The image is set to be displayed.
[0030]
Therefore, the data processing content to be executed in response to the data specification of the specific line in the above-described processing instruction word for displaying history information is, for example, writing data to a set address in the processing instruction word for displaying image information. Accordingly, in conjunction with the selection operation of the history information, 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.
[0031]
In addition, processing instruction words for displaying detailed information can open a detailed information display screen 54 on coordinates set in advance and display a text file corresponding to a file number set as reference information on the detailed information display screen 54. It is assumed that. The file number is uniquely associated with the message content in the history information, and detailed information such as the cause of the occurrence of the abnormality and the coping method is included as the content of the text specified by the file number.
[0032]
In the present embodiment, the acquisition stage of the history information is further divided into, for example, first to third stages, the first stage is a stage during normal operation, and the second stage is not enough to stop the system. Is defined as a stage that involves the possibility of becoming abnormal, while the third stage is defined as a stage beyond the limit that would cause a problem if left unchecked, and a value detected by the sensor 50 in the target system 12 Set a limit value to distinguish each stage.
[0033]
Here, in the above-mentioned first stage, a predetermined minimum necessary time is set in advance in response to a time when a special event occurs, for example, at the time of starting or ending the system or when the operating condition is changed. The 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 numerical data.
[0034]
Further, when the detected value enters the second stage, the numerical value is set at a fixed time interval at a time interval shorter than that of the first stage, or at a set timing such as when the rate of increase or decrease of the measured value exceeds the set value. While capturing data, still images at each point in time are captured.
[0035]
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 the determination are stored, and the system is urgently stopped. On the other hand, the display screen 26 is forcibly switched to a unit screen for displaying history information.
[0036]
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-stage recording data as required by selection are stored in the history information. A list is displayed on the display screen 52 by displaying one or several lines for one data item.
[0037]
At the same time, a display that appeals to hearing by a buzzer or the like and a display that appeals to vision by blinking a lamp are made, and an image sent from the video camera 42 is automatically displayed on the image information display screen 48, and abnormalities are displayed. The current situation at the site where is occurring 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.
[0038]
Furthermore, when individual data listed in the list is specified via the touch panel 28, a still image recorded at the same time when the data is collected is displayed on the image information display screen 48, and a countermeasure for abnormalities and detailed information are provided. The details of the cause of the abnormality are displayed on the detailed information display screen 54, and the situation leading to the abnormality can be confirmed not only as history information but also intuitively using images and detailed descriptions.
[0039]
In the above-described embodiment, an example 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 has been described. 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.
[0040]
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, and the summary information. The contents to be referred to, such as the instruction method and the storage address and storage method of the data displayed on the detailed information display screen 54 when the general information is selected, can be appropriately increased or decreased.
[0041]
For example, it is possible to set an offset value to the file number or address where the detailed information is stored, and to change the offset value according to the difference between unit screens and the occurrence status of alarm, so that different It is also possible to display detailed information of the content.
[0042]
Further, the data displayed on the history information display screen 52 is not limited to displaying the abnormal state corresponding to the outline data of the third stage as described above, and the data of the second or first stage may be simultaneously or selectively displayed. Can be displayed. 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.
[0043]
Also, the method of displaying the detailed information is such that detailed information corresponding to the keyword in the message is provided in advance, instead of displaying it in conjunction with designating one line of the history information display screen 52, and specifying the keyword. In such a case, necessary data display may be performed in response to the request. Further, the method of specifying the display data can also be implemented by appropriately changing a pointing device such as a mouse, a keyboard, or the like in place of the fingertip instruction using 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 Video processing circuit 46 Video 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)

Each time a detection operation corresponding to a preset condition is performed on a predetermined detection target, the outline data that uniquely identifies the detection content is stored, and the stored outline data group can be displayed in a list format Display control means, and a notifying means capable of hearing or visual appeal, comprising a display screen, in conjunction with an instruction operation for the general data displayed by the display control means on the display screen A display device for displaying detailed data corresponding to the instructed summary data,
The above-described detailed data includes at least character information stored in advance corresponding to each of the outline data and at least still image information of the detection target at the time when the instructed outline data is stored,
When it is detected during the detection operation that the abnormal value exceeds a preset abnormal value for the detection target, the display on the display screen is forcibly switched to a list display of the general data group, and A notification operation by the notification means is performed,
In conjunction with the indication of each of the summary data, a first screen for specifying and displaying the designated summary data while the summary data group is displayed in a list, and character information corresponding to the designated summary data are displayed. And a third screen displaying still image information corresponding to the instructed summary data are displayed on the same display screen , and further,
The detection operation is divided into a first stage during a normal operation of the detection target, a second stage in which the detection target is likely to be abnormal, and a third stage in which the detection target is in an abnormal state. Conditions can be set,
In the first stage, the minimum necessary numerical data and still image information set in advance corresponding to the time when the special event occurs are stored,
In the second stage, the numerical data and the still image information are stored in conjunction with the increase or decrease rate of the measured value exceeding the set value,
The display device according to claim 3, wherein in the third step, the numerical data and the still image information are stored in conjunction with the determination that the measured value has exceeded the value indicating the abnormality . A display device according to claim 1,
A PLC connected to the display device and capable of controlling a target system including the detection target;
An imaging unit capable of imaging the detection target in a moving image state,
The display device is a program type display device, and the detailed information further includes display information in the form of a graphic or an animation, while the character information relates to a cause of an abnormality occurrence and a method of coping with the abnormality. Enables text-to-speech synthesis of text contents, and
When it is determined that the abnormal value exceeds a preset abnormal value for the target system, the target system is stopped, and the current status of the detection target until the outline data in the list display is indicated. A control system characterized in that a moving image picked up by the image pickup means can be displayed on the display screen. Each time a detection operation corresponding to a preset condition is performed on a predetermined detection target, the outline data that uniquely identifies the detection content is stored, and the stored outline data group can be displayed in a list format Display control means, and a notifying means capable of hearing or visual appeal, comprising a display screen, in conjunction with an instruction operation for the general data displayed by the display control means on the display screen The detailed data corresponding to the instructed summary data is displayed,
The above-described detailed data includes at least character information stored in advance corresponding to each of the outline data and at least still image information of the detection target at the time when the instructed outline data is stored,
When it is detected during the detection operation that the abnormal value exceeds a preset abnormal value for the detection target, the display on the display screen is forcibly switched to a list display of the general data group, and A notification operation by the notification means is performed, and
In conjunction with the instruction of each of the general data, the general data group is displayed while the general data group is displayed in a list. A first screen for specifying and displaying the outline data, a second screen for displaying character information corresponding to the instructed outline data, and a third screen for displaying still image information corresponding to the instructed outline data. Screen, a display device displayed on the same display screen,
A PLC connected to the display device and capable of controlling a target system including the detection target;
An imaging unit capable of imaging the detection target in a moving image state,
The display device is a program type display device, and the detailed information further includes display information in the form of a graphic or an animation, while the character information relates to a cause of an abnormality occurrence and a method of coping with the abnormality. Enables text-to-speech synthesis of text contents, and
When it is determined that the abnormal value exceeds a preset abnormal value for the target system, the target system is stopped, and the current status of the detection target until the outline data in the list display is indicated. A control system characterized in that a moving image picked up by the image pickup means can be displayed on the display screen.

Images