TWI594095B - Programmable display, program and access error notification method - Google Patents

Description

Programmable display, program and access error notification method

The present invention relates to a programmable display.

The programmable display is generally connected to various connection devices such as a PLC main body or a temperature adjustment device, and displays numerical items such as display of status of the connected devices, items such as lamps, and the like for the user to make an arbitrary instruction. A portrait of a project such as a switch. Furthermore, items are also referred to as screen parts and the like. On the screen of the programmable display (called the operation display screen), the image of the plural screen part (item) is usually displayed. The information (such as a screen material) for displaying such an operation display screen is arbitrarily created by a developer or the like in a support device (not shown), and is downloaded from the support device to the programmable display.

In the above-mentioned screen data, the image of the item (the image of the switch and the image of the lamp) and the display position coordinate are included in the above-mentioned items, and the address of the predetermined area (distributed memory address) of the external memory to be described later is further included. data. In addition, there are cases where some programs are included.

Each of the above-described items is associated with an arbitrary component of an arbitrary connected device, and the state of the component is displayed and the component is accepted. The indicator of ON/OFF. For example, when the numerical value is used to display the temperature measurement value of the temperature adjustment device, the current temperature is displayed as a numerical value at any time.

The display control of the various items described above is realized by performing the predetermined processing on each of the aforementioned items, for example, periodically. The predetermined processing means, for example, reading the stored data of the predetermined area (distributed memory) of the memory device (which is set as the external memory) in the connected device, and determining the display content of the display item based on the stored data. Further, the connection device updates the stored data of the predetermined area of the external memory at any time (for example, the temperature measurement value is updated at any time in the temperature adjustment device).

Further, the data read from the external memory is temporarily stored in a predetermined area of a memory device (which is an internal memory) in the programmable display, and the display content of the display item is determined based on the stored data. Construction.

In the case of this example, the process of reading the stored data of the external memory and storing it in the internal memory is performed periodically, for example, by a predetermined functional unit (herein, a communication unit (not shown)) of the programmable display. The communication unit communicates with various connection devices such as the PLC main body and the temperature adjustment device, and acquires stored data of a predetermined memory area of the external memory connected to the device, and overwrites the data in the internal memory. The specified area of the body. Then, a functional unit (which is a project display unit) that performs display control relating to various items of the above-described display of the display is used to periodically access the internal memory to control the item display content.

However, when there is a communication error with the connected device, some abnormality (including temporary) occurs in the external memory itself or in the defined memory area, The data acquisition processing of the memory will fail. At this time, the communication unit recognizes the connection device of the communication partner, and the item display unit displays a window indicating an error such as "general communication error with the PLC main body", and displays it on the screen to prompt the user's attention.

Further, for example, Patent Document 1 discloses a content such as an image from the outside, an overlay display on an original operation screen, and the like.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-140104

As described above, in the past, a communication error with the connected device or the like is detected, and a warning display is performed. This can be said to indicate that the display content of the connected device, such as a communication error, is in an untrustworthy state (not the current value).

However, the operator does not necessarily see the display to identify untrustworthy items. For example, when the display of "communication error with the temperature adjustment device" is displayed, it is not always possible to determine which item (1 or plural) is the item for displaying the status of the temperature adjustment device. Further, when only the data of the predetermined memory area of the external memory becomes an acquisition error, the error display cannot be performed for the item related to the memory area.

An object of the present invention is to provide an error display by using a specific item and displaying an item when the acquisition of the memory data associated with an arbitrary item becomes impossible due to some reasons, so that the operator can At a glance, it is possible to identify a programmable display such as an abnormal item display.

The programmable display of the present invention is a programmable display connected to a predetermined connected device, and has communication processing means, item display means, and error notification means.

The communication processing means reads the data held in the memory area of the predetermined connected device.

The item display means displays items indicating various states of the predetermined connected device based on the data read by the communication processing means.

The error notification means displays the predetermined error image in response to the failure of the reading process of the data due to the communication processing means.

1‧‧‧Standed display

2‧‧‧Communication interface

3‧‧‧Communication line

4,4-1,4-2‧‧‧Connected machine

5‧‧‧ Painting editing device

6‧‧‧Communication line

10‧‧‧Display operation control device

11‧‧‧CPU

12‧‧‧ROM

13‧‧‧RAM

14‧‧‧Communication controller

15‧‧‧Graphics controller

16‧‧‧Touch Panel Controller

17‧‧‧ Busbar

18‧‧‧Touch panel

19‧‧‧ Display

21‧‧‧ body program

22‧‧‧ Screen Information

23‧‧‧Communication program

31‧‧‧painting editor

32‧‧‧Screen data file

33‧‧‧Communication program files

41‧‧‧Project Generation Department

42‧‧‧Project Processing Schedule

43‧‧‧Project Processing Department

44,44-1,44-2‧‧‧Communication Processing Department

45‧‧‧Common memory

46‧‧‧Project list

47‧‧‧Error display of image data

51‧‧‧埠

52‧‧‧Device name

53‧‧‧ address

54‧‧‧Information

55‧‧‧Error Information

61‧‧‧Project type

62‧‧‧ coordinates

63‧‧‧ size

64‧‧‧Device name

65‧‧‧ address

66‧‧‧Information for each type of project

67‧‧‧Processed flag

WAY1, WAY2‧‧‧Communication埠

71‧‧‧Device name

72‧‧‧ address

73‧‧‧Information

74‧‧‧ Error Information

101‧‧‧ memory list

102‧‧‧Memory information

81‧‧‧Information

82‧‧‧Error information

Fig. 1 is a schematic structural view showing the entire system including the programmable display of this example.

FIG. 2 is a structural example of a programmable display of this example.

[Fig. 3] A software structure diagram of the system.

[Fig. 4] An example of an operation display screen when an error occurs.

[Fig. 5] A processing function diagram of the programmable display of this example.

[Fig. 6] A specific example of the shared memory, (a) is a data structure example, and (b) is a data storage example.

FIG. 7 is a flowchart of processing of the information processing unit.

FIG. 8 is a flowchart of processing of the item processing unit.

[Fig. 9] (a) to (c) are various data structure diagrams.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a schematic configuration diagram of the entire system including the programmable display 1 of this example.

The programmable controller system shown in FIG. 1 has various connected devices 4 and a programmable display 1 connected to various connected devices 4 via a communication line 6. Further, a configuration in which the programmable display 1 is connected to the drawing editing device 5 via the communication line 3 may be employed. However, the drawing editing device 5 is not necessarily required (only one example is disclosed).

The programmable display 1 is provided with a plurality of communication interfaces 2 (communication ports) connected to the various connection devices 4 and the drawing editing device 5 via communication lines 3/communication lines 6 connected to the respective communication interfaces 2.

Fig. 2 is a configuration example of the programmable display 1 of this example.

The programmable display 1 has a function similar to the above-described conventional example, and has a function of displaying a display screen according to the operation of the screen data or the like described above, but further has an item display corresponding to the error when a specific error occurs, and display The function of a specific tag or the like. And detailed later.

The illustrated programmable display 1 has a display operation control device 10, a touch panel 18, a display 19, the aforementioned communication interface 2, and the like.

The display operation control device 10 is formed by a CPU 11, a ROM 12 (flash memory or the like), a RAM 13, a communication controller 14, a graphics controller 15, a touch panel controller 16, and the like, and these members are connected to the bus bar 17.

The CPU 11 controls the central processing of the entire display operation control device 10 Device (operational processor). The CPU 11 performs a predetermined calculation operation (processing) by executing a program (for example, a main body program 21 to be described later) stored in the ROM 12 in advance. For example, the processing described in FIG. 5, FIG. 7, and FIG. 8 described later will be executed. Various calculation results are stored, for example, in the RAM 13 and the ROM 12.

Further, in the ROM 12, the screen material (the screen material 22 to be described later) described in the above prior art is stored. As described above, the screen data is, for example, corresponding to the items of the switch, the lamp, and the like described above, and includes information related to the display of the item and the display position coordinates and size, and the assigned memory address (distributed memory area). Memory access related information, etc.

The processing of the CPU 11 includes, for example, a process of acquiring "storage data such as a distributed memory address of each item" (storage data of a predetermined area of the external memory) described in the above-mentioned prior art. The acquired data is temporarily stored in, for example, the shared memory 45 described later. Further, the shared memory 45 may be a part of the memory area of the RAM 13 and the ROM 12, and may be another memory (not shown).

Further, by the processing of the CPU 11, for example, the display target data based on the screen data and the acquired data is developed (drawn) on the RAM 13 (or a video RAM (not shown)). According to the drawing, the graphics controller 15 displays the above-described operation display screen and the like on the display 19. For example, in the case of a lamp, the image data includes a light-emitting image and a lighting image. If the acquired data is '0', the light-emitting image becomes the display target data, and if it is '1', the light is turned on. The portrait becomes the aforementioned Display object data.

Further, the display processing of the operation display screen based on the screen data and the acquired data may be slightly the same as the previous one. In this method, in addition to such display, there is a situation in which a specific mark (!, etc.) to be described later is displayed.

In other words, as shown above, the content of the display on the operation display screen reflects the content of the content (the stored data of the predetermined area of the external memory). For example, in the case of the above-described example of the lamp, since the acquired data at a certain point in time is "1", the stored data is changed to '0' in the state in which the lighting image is displayed. However, for some reason, when the acquisition of the stored data fails, it is necessary to switch to the light-emitting image, but the state of the lighting image is always displayed.

Even in this method, in such an example, a lighting portrait is always displayed. However, in response to the lighting image (overlapping the lighting image; or in the vicinity of the lighting image), a specific mark (!, etc.) to be described later is displayed. Thereby, the operator or the like can recognize that there is an error in the display of the lighting image (the current status is not reflected; it is a past state).

The display 19 is formed, for example, by a liquid crystal panel or the like, and the touch panel 18 is provided so as to be superposed on the liquid crystal panel. On the display 19, basically, the operation display screen in which the plurality of item images are arranged at a predetermined position is displayed. However, in the case of the present method, as described above, the status of the specific mark (!, etc.) is further displayed.

Further, the communication controller 14 performs communication (data transmission and reception, etc.) with the connection device 4 and the drawing editing device 5 such as the PLC main body and the like, which are not shown, through the communication interface 2.

The detection result of the pressing operation (touch) position on the touch panel 18 by the operator or the like is captured by the touch panel controller 16 to be analyzed by the CPU 11 or the like. For example, the analysis is performed based on the data of the display position coordinates and the size of each item. For example, when an operator touches the display position of the portrait of the switch, the CPU 11 analyzes the operator who performs the switch.

The soft structure diagram of the aforementioned system is disclosed in FIG.

In the programmable display 1, various programs/data such as the main program 21, the screen data 22, and the communication program 23 are stored in the ROM 12 (flash memory or the like), for example. The CPU 11 reads out, executes/references the programs/data, and the like, and performs display control and the like on the operation display screen for the programmable display. The operation display screen is formed by the image display of various items such as the numerical display, the lamp, the switch, and the like, and the display content of each item image is reflected, for example, from each connected device 4 (external memory; assigned memory area). The method of obtaining the information (the above-mentioned information) is updated at any time.

Basically, the CPU 11 performs processing based on the body program 21 and the screen material 22 to display the aforementioned operation display screen. Then, the display content of each screen component on the operation display screen (the numerical value display of the temperature and the like, and the lighting/erasing of the lamp, etc.) are the communication results with the connected devices 4 according to the communication program 23 (the aforementioned acquisition data) Etc.), update at any time, etc.

The screen data 22 is, for example, downloaded and stored in the programmable data display 1 in the screen data file 32 which is created in advance on the side of the drawing editing apparatus 5. Moreover, the communication program 23 is also stored in advance for painting, for example. The communication program file 33 (part of) on the side of the editing device 5 is downloaded and stored in the programmable display 1.

As described above, basically, the CPU 11 performs display control of the aforementioned operation display screen in accordance with the main body program 21, the screen data 22, and the acquired data. For example, regarding items such as numerical displays and lights, data is periodically read from the allocated memory area of the item, and the display contents of the items are updated based on the read data. Alternatively, when the user touches a desired switch on the operation display screen (for an ON/OFF operation), for example, a switch or the like, the switch ON image display/switch OFF image display is performed. Further, the CPU 11 also performs control of the connection device 4 in response to the switching operation.

Furthermore, the assigned memory area corresponds to a predetermined memory area (distributed memory address) of the external memory of the prior art. Furthermore, the memory corresponding to the external memory is hereinafter referred to as "machine memory". Further, a memory corresponding to the internal memory is referred to as a "display memory".

Further, as described above, the "machine memory" (external memory) is connected to the memory of the device 4, and the memory distributor of each item is performed. As described above, the display content of each item is determined based on the stored data of the allocated memory area.

Then, as described above, there is a structure in which the read data from the allocated memory area is temporarily stored in the "display memory" (internal memory) in the programmable display 1, and the item display control is performed. .

In other words, for example, each of the communication processing units 44 and the like, which will be described later, periodically records the memory device (machine memory) in the connected device 4. The memory area reads the data and stores the read data in the processing of the display memory. Then, display control of the aforementioned operation display screen is performed in accordance with the stored data of the display memory or the like. Thereby, the display content of each item image on the operation display screen becomes the content of the latest stored material in response to the allocated memory area of the corresponding item.

However, when it is not possible to obtain the stored data of the allocated memory area of the arbitrary item for some reason, the display content of the item image may be the one that does not reflect the latest information (and thus has low reliability). When the communication error is the cause, there is a possibility that the reliability of the display content is low in all the items related to the connected device 4 that is the communication partner that is the error. As described above, even if the operator or the like knows that an error has occurred, it is difficult to determine which of the item images has low reliability. On the other hand, according to this method, it is possible to easily recognize which of the project images has low reliability in any of the project images.

The communication program 23 of the programmable display 1 is a program for communicating with the connection device 4 via the communication line 6. Usually, there is an inherent communication protocol (communication regulation) corresponding to the model of each connected device 4, and communication between the programmable display 1 and the connected device 4 is performed in accordance with the communication regulations. Therefore, the communication program 23 needs to be developed corresponding to the model of each connected device 4. Further, of course, the communication program 23 is executed by the CPU 11 or the like to realize communication processing with the connected device 4.

Further, the communication between the programmable display 1 and the drawing editing device 5 is performed by, for example, the main body program 21 and the drawing editor 31 (the communication function is incorporated in the drawing editor 31). There is no special concern about this part. Therefore, the illustration is not shown. The connection device 4 of the PLC main body and the like is equipped with various brands and models. There are separate communication programs for each brand/model. The communication program 23 is based on the label/machine type of the connected device 4, and is plural according to the situation. Type.

The communication program 23 is usually stored in advance in an HD (hard disk) (not shown) in the drawing editing device 5 as a complex communication program file 33 (corresponding to each model and a developed complex communication program). Then, the drawing editing device 5 transmits the communication program file 33 of the connected device 4 to the programmable display device 1 when the user selects the arbitrarily connected device 4 by the drawing editor 31. It is memorized as the communication program 23.

The access to the machine memory in the connected device 4 is performed in accordance with various settings of the drawing editor 31 (setting when the screen data file 32 is created).

For example, when the screen data file 32 is created, the user uses a numerical value display item in the screen, and specifies an arbitrary address of the machine memory for the numerical value display item, and the programmable display 1 can periodically read the machine memory. The specified address of the body and set the displayed action. In other words, when the screen data file 32 is downloaded to the programmable display 1 and used as the screen material 22, the programmable display 1 can periodically read the data of the specified address of the machine memory (and further The operation of temporarily storing the acquired data in the display memory) and performing numerical display on the screen based on the acquired data.

Furthermore, the access to the aforementioned machine memory and the acquisition of data are temporarily realized. The program for various processing such as time storage and screen display may be included in the main body program 21, for example, and may be included in the screen data file 32 (screen data 22). In any case, the above-described various operations (or the operations described in FIG. 5, FIG. 7, and FIG. 8 to be described later) can be realized by, for example, executing the program by the CPU 11.

Alternatively, when the screen data file 32 is created, for example, when a switch is placed in the screen and an arbitrary address of the machine memory is designated as the output memory, when the switch is pressed on the display operation screen of the programmable display 1, the switch can be pressed. Sets the action to write to the specified address of the machine's memory.

In any case, the access processing of the aforementioned machine memory and the update processing of the item display content may be substantially the same as before. In the present method, a specific flag (!, etc.) to be described later is displayed on the operation display screen (for example, when a communication error with an arbitrary connection device 4 occurs). This will be described in detail below with reference to FIG. 4 .

FIG. 4 shows an example of the aforementioned operation display screen when a specific error occurs in the programmable display 1 of the present example.

The specific error described above refers to the failure of data reading (data acquisition) from the allocated memory area of the aforementioned machine memory associated with any item, for example, a communication error with the connected device 4 is the cause. It is one of the features of the method to display the image of the item that failed the data acquisition and display the specific mark (indicated here as the ! mark) in advance.

In the example shown in the figure, a part of the item image superimposed as shown in the figure displays a specific mark (!) of an example of the predetermined error picture. However, the present invention is not limited to this example, and for example, a specific mark (!) may be displayed in the vicinity of each item image. In any case, the image display of the item related to the failure of the corresponding data acquisition is displayed in a manner of displaying a specific mark (!).

In addition, the predetermined error image is, for example, a certain still picture, and the example of the still picture is the above-mentioned "!". However, the present invention is not limited to this example, and may be a certain still picture registered in advance. Further, the predetermined error image is not limited to a still picture, and may be an animation, a photo, an article, a cartoon, or the like, or may be a combination of the above. In the present invention, a certain still picture, a still picture registered in advance, and then an animation, a photo, an article, a cartoon, or the like, or such a combination are defined as a predetermined error picture (also referred to as an error picture).

In the illustrated example, three types of item images are disclosed. However, since all of the above-described specific marks (!) are displayed, the user can recognize that the display contents of all of the three item images are in a state of being untrustworthy.

Alternatively, although not shown, for example, only one of the three types of project images may be displayed, and a specific mark (!) may be displayed. In the case of this example, the display content of the one item image is in a state of being untrustworthy, but it is recognized that the display contents of the remaining two item images are in a creditable state.

Figure 5 is a diagram showing the processing function of the programmable display of this example.

The CPU 11 executes, for example, a predetermined program (for example, the main body program 21, the communication program 23, and the like) stored in the ROM 12, thereby realizing various processing function portions shown, for example, in the broken line of FIG. In other words, the processing functions of the various processing function units, such as the item generation unit 41, the item processing scheduling unit 42, the item processing unit 43, and the communication processing unit 44 (44-1, 44-2, etc.), are described later.

Further, for example, the item generation unit 41, the item processing schedule unit 42, and the item processing unit 43 are realized by the main body program 21. The communication processing unit 44 is realized by the main body program 21 and the communication program 23.

Further, when the processing of the processing functions is executed, the screen material 22 and the erroneous display image data 47 shown in the figure are used. In addition, the erroneous display image data 47 is the aforementioned specific mark (in this example, !) which is previously stored in the ROM 12 or the like in this example, but is not limited to this example.

The item generation unit 41 generates a list of items 46 based on the aforementioned screen material 22 and the like. This is generated, for example, by extracting a part of the screen material 22 (and adding the processed flag 67 to be described later).

Here, in FIG. 9(a), the data structure diagram of the item list 46 is disclosed.

The example list 46 of the illustrated example is made up of item type 61, coordinate 62, size 63, device name 64, address 65, "data for each item type" 66, and various data items of processed flag 67. Other than the processed flag 67, it may be the same as the previous one, and the following will be briefly described.

In the item type 61, item type identification information that reveals the type of the item (switch, lamp, numerical display, etc.) is stored.

In the "data for each item type" 66, additional information such as the image data of the item (the item image; the item type is a switch, which is a switch image) is stored. The data showing the position and size of the image of the item on the screen is stored in the coordinates 62 and 63. These are related to the image display of each item on the operation display screen.

Further, the device name 64 and the address 65 are memory allocation information related to each item, and correspond to the aforementioned assigned memory address. That is, the device name The memory area indicated by the address 65 of the memory shown in Fig. 64 is the area (the aforementioned allocated memory area) assigned to the item. In the memory area, for example, if the item type 61 is a lamp, a flag data indicating the lighting/erasing of the lamp or the like is stored. Further, the memory indicated by the device name 64 is the aforementioned device memory (arbitrarily connected to the memory in the device 4).

The item processing schedule unit 42 performs schedule management such as display state update processing of each item image by the item processing unit 43. In other words, the item processing scheduling unit 42 periodically calls the item processing unit 43 to execute, for example, the processing of FIG. 8 described later (in other words, the processing of FIG. 8 is periodically executed).

The item processing unit 43 performs processing related to updating the display content of the image (for the item display means) in accordance with the item list 46 and the stored data of the shared memory 45, which will be described later, in accordance with each item. At this time, in the method, a specific mark (!) is displayed depending on the situation.

In other words, the item processing unit 43 also displays a portrait (for example, a partial overlap) of a specific error (a data acquisition failure related to the item display; for example, a communication error with the connected device 4). The processing of the image data 47 (specific mark (!)) (processing as an error notification means) is displayed. For specific details, a specific example of the stored data of the shared memory 45 shown in FIG. 6 will be described later. Furthermore, the shared memory 45 corresponds to the display memory.

Further, the item processing unit 43 draws (expands) each item image on the RAM 13. At this time, the acquired data is also drawn (expanded) on the RAM 13 in accordance with the type of the item. According to this, the drawing data is displayed on the display by the graphic controller 15 to display the display operation screen. The drawing data is updated by the item processing unit 43 every time, for example, when the processing of FIG. 8 described later is executed. In addition, depending on the situation, the specific mark (!) is also drawn, and the display shown in FIG. 4 is also displayed.

The communication processing unit 44 corresponds to the communication processing units 44-1 and 44-2 (communication processing means) included in each of the connected devices 4 (4-1,4-2). In other words, the communication processing unit 44-1 shown in the figure transmits communication with the connection device 4-1 via the communication line 6 using the communication port WAY1 of the connection device 4-1, and acquires a predetermined area of the device memory (distribution). Memory area). The acquired data is overwritten and stored in a predetermined area of the shared memory 45.

Similarly, the communication processing unit 44-2 shown in the figure uses the communication port WAY2 of the corresponding connection device 4-2, communicates with the connection device 4-2 via the communication line 6, and acquires a predetermined area of the device memory (distribution). Memory area). The acquired data is overwritten and stored in a predetermined area of the shared memory 45.

The acquisition processing of the stored data in the allocated memory area and the storage processing of the shared memory may be slightly the same as before. However, in the method, when the data acquisition fails, the error information is recorded in the shared memory. 45 of this area. This area is a field of error information 55 which will be described later on the record on the shared memory 45 of the item, for example, when the data related to any item fails to be acquired.

As a result, at the time of the drawing processing on the RAM 13 by the item processing unit 43, the specific mark (!) is drawn for the item whose data acquisition has failed. According to this, the corresponding data acquisition fails on the operation display screen. A portrait of the item showing a specific mark (!).

A specific example of the aforementioned shared memory 45 is disclosed in FIG.

Fig. 6(a) shows a data structure example of the shared memory 45, and Fig. 6(b) shows a data storage example.

In the example shown in FIG. 6(a), the stored data 50 of the shared memory 45 is formed by each data item of the file 51, the device name 52, the address 53, the data 54, and the error information 55. Furthermore, in these cases, the data items other than the error information 55 may be slightly the same as before. Therefore, the following description will be briefly made.

The 埠51 is the identification information of the communication port, etc., and is substantially the information identifying the connection device 4 of the communication opponent. The device 52 is identification information of a memory device (machine memory) in the connection device 4 of the communication opponent. The address 53 is the address of the memory area of the machine memory indicated by the device 52, and the data 54 is stored in the data 54 from the memory area.

Furthermore, the 埠51 and the device name 52 and the address 53 may be regarded as equivalent to the aforementioned "distributed memory address" for each item. That is, each record shown in FIG. 6(b) corresponds to each item. The above-mentioned assigned memory addresses, which are included in the screen material 22 and the like, are stored as 埠51, device name 52, and address 53, and each record shown in FIG. 6(b) is generated. Furthermore, at this time, a link between the record and the item is formed. Thereby, when the display update processing of an arbitrary item or the like is performed, the record of the corresponding item is referred to in the shared memory 45.

Then, in the error message 55, the status of the information indicating the occurrence of the specific error by the communication processing unit 44 is stored. That is, the communication processing unit 44 When the data acquisition failure of the above-mentioned distribution memory area is concerned with any item, the information indicating the occurrence of the specific error ("error" in the figure) is stored in the error information 55 of the record of the item of the shared memory 45.

According to the above, when the record related to an item is the second record of the example shown in FIG. 6(b), the address 200 of the memory device D connected to the device 4-1 is the "distributed memory address" of the item. In the illustrated example, the current stored data of the "dispatch memory address" is '1000'. However, when the error message 55 is "error", the value is not necessarily correct.

For example, in the case of the first record of the example shown in FIG. 6(b), the address of the memory device D connected to the device 4-1 is 100, and the data '12345' is stored, but the data is not necessarily Is the right information. This is because the error information stored in the first record has an "error".

In other words, the communication processing unit 44-1 attempts to acquire the data from the address 100 of the memory device D connected to the device 4-1. However, the data acquisition fails due to a communication error or the like, so the first record is recorded. The error message 55, as shown, has an "error" stored. At this time, the aforementioned information '12345' is not the current information, it may be the old one. In the present method, for example, the image corresponding to the first record (for example, the image can be determined by the above-described connection) is displayed, and the specific mark (!) is displayed, for example, by superimposing a part thereof. Thereby, the operator or the like can recognize that there is a possibility that the above-mentioned '12345' displayed on the screen has a correct value.

For example, the item processing unit 43 obtains the data 54 by referring to the related records of the shared memory 45, for example, in accordance with the processing of FIG. 8 to be described later, and accordingly, the determination is made to update the display of the item image. The handling of the volume. The processing itself may be slightly the same as before, but the item processing unit 43 of the present example further refers to the error information 45 and performs processing according to the error information 45.

That is, the item processing unit 43 performs only the same processing as the previous one if the error information 55 is "normal". On the other hand, when the error information 55 related to an arbitrary item is "error", the item processing unit 43 displays the image data 47 (specific mark (!)) in error, and the display position of the image of the item is overlapped, for example. The way the project portrait is displayed (for example, as shown in the example shown in Figure 4). However, this is only an example and is not limited to this example.

FIG. 7 is a flowchart of the processing of the information processing unit 44.

For example, in the example of FIG. 5, each of the communication processing units 44-1 and 44-2 executes the processor of FIG. 7 periodically (periodically).

In the processing example of FIG. 7, first, referring to the shared memory 45, the memory list 101 related to the connected device 4 itself is generated (step S1). For example, in the processing by the communication processing unit 44-1, the memory list 101 associated with the connected device 4-1 is generated.

FIG. 9(b) shows an example of the data structure of the memory list 101.

In the illustrated example, the memory list 101 is formed by each data item of the device name 71, the address 72, the data 73, and the error information 74. For example, in the case of the example of the communication processing unit 44-1, all the records of "WAY1" are extracted from the shared memory 45, and the device name 52, the address 53, the data 54, and the error information of each extracted record are extracted. The information of 55 is stored in the device name 71, the address 72, the data 73, and the error information 74 to generate the memory list related to the connected device 4-1. 101. Furthermore, the information 73 and the error information 74 are not necessarily necessary. It is also possible to store flag information indicating whether it has been processed or not.

After that, the process of steps S2 to S7 is repeatedly executed until the determination in step S7 is NO by referring to the generated memory list 101.

In other words, the unprocessed record (set as the processing target record) is taken out from the memory list 101, and a memory read command based on the content of the record is generated, and the connected device 4 serving as the own is transmitted via the communication line 6 (step S2). ). Then, it becomes a response waiting from the connected device 4 for the command (step S3). The command includes information specifying an access target such as the device name 71 and the address 72 (allocation memory address), and the connected device 4 reads the data from the memory area indicated by the allocated memory address, and replies The response processing of the read data. However, for some reasons, when the data reading fails, the memory is read incorrectly.

The communication processing unit 44 determines that a specific error has occurred, for example, when there is no response after a predetermined time elapses from the transmission of the command (a situation such as a communication error), or when the response content is a memory reading error or the like (step S4). YES), "Error" is stored in the field of the error information 55 corresponding to the record of the processing target record in the shared memory 45 (step S6).

On the other hand, when the connection device 4 has a normal response (step S4, NO), the read data included in the response is stored in the shared memory 45 corresponding to the record of the record of the processing target. Field (step S5). Furthermore, at this time, when "error" is stored in the field of the error message 55, the information is cleared (or "normal" is stored).

Then, after performing any of the above steps S5 and S6, it is checked whether the unprocessed record remains in the memory list 101, and if there is still remaining (YES in step S7), the process returns to step S2, and when there is no remaining (step) S7, NO) ends the process.

FIG. 8 is a flowchart of the process of the item processing unit 43.

As described above, the processing of Fig. 8 is based on the management of the item processing schedule unit 42, and is periodically executed.

In the processing example of FIG. 8, the item processing unit 43 first performs initialization processing of the item list 46 (step S11). This is for example to set the processed flag 67 of all records of the item list 46 to "unprocessed". Thereafter, the process of steps S12 to S19 is repeatedly executed until step S19 described later becomes NO.

In other words, the record in the item list 46 in which the flag 67 is "unprocessed" is arbitrarily recorded, and the processing target record is referred to, and the device name 64 and the address 65 are acquired by referring to the processing target record (step S12). The data records the related records of the shared memory 45 and acquires the data (step S13). That is, for example, the device name 52 and the address 53 are the same as the aforementioned device name 64 and the address 65 are the aforementioned related records. Then, as the memory information 102, the data 54 of the related record and the error information 55 are acquired (step S13).

Further, the memory information 102 is composed of the data 81 and the error information 82 shown in FIG. 9(c), and the data 54 and the error information 55 are acquired.

Then, according to the foregoing memory information 102, it is determined whether a specific occurrence occurs. Error (communication error, memory reading error, etc.) (step S14). This error message 82 is determined by being "error" or "normal". Of course, if the error information 82 is "error", it is determined that a specific error has occurred (YES in step S14), and the process proceeds to step S16. On the other hand, if the error information 82 is "normal", it is determined that there is no specific error (step S14, NO), and the process proceeds to step S15.

When there is no specific error (step S14, NO), the display processing as before is performed. In other words, the normal item drawing processing (for example, development on the RAM 13) of the information (the image, the coordinates, the size, and the like of the item) recorded by the use data 81 and the processing target is performed (step S15).

On the other hand, when there is a specific error (YES in step S14), the item drawing processing is performed when the error is caused by the information recorded by the processing target and the method of the error display image data 47 (steps S16, S17). This is the first process of determining the display position coordinates of the error display image data 47 (specific mark (!, etc.)) (step S16).

The processing of the step S16 itself may be in various forms, but basically, based on the coordinates 62 (=X, Y), the display position of the specific mark (!) is determined by using a preset offset value or the like. coordinate. For example, since the coordinates 62 are mostly the coordinates of the upper left corner of the item display area, when a specific mark (!) is to be displayed in the upper right corner of the item display area, (X+width, Y) is set using, for example, the "width" of the size 63. The coordinates of the display position of a specific mark (!) can be used.

Then, the coordinates determined in the above-described step S16 are performed, and the processing of drawing the aforementioned specific mark (!) (for example, on the RAM 13) is performed (step S17). again The same item drawing process as that of step S15 may be performed before, but this process may not be performed.

Further, as described above, the graphics controller 15 displays the drawing material or the like on the RAM 13 on the display. Therefore, in the above-described processing example, the specific mark (!) is displayed in the upper right corner of the portrait of the item in which the specific error occurs.

In this way, by using a specific item that has a specific error and corresponding to the image of the item (overlapping; or nearby) to display the specific standard (!), the operator can recognize at a glance that the content of the related item image cannot be trusted. .

When the execution of the processing of the above-described step S15 or steps S16 and S17 is completed, the flag 67 of the processing target record of the item list 46 is changed to "processed" (step S18).

Then, if there is an unprocessed record remaining in the item list 46 (YES in step S19), the process returns to step S12, and if all of them have been processed (step S19, NO), the process ends.

As described above, in the case of the programmable display 1 or the like according to the present example, when the acquisition of the memory material associated with an arbitrary item becomes a state in which it cannot be performed for some reason, the specific use of the item is performed and the corresponding is performed. The error display of the project allows the operator to identify the abnormal project at a glance.

1‧‧‧programmable display

2‧‧‧Communication interface

3‧‧‧Communication line

4‧‧‧Connecting machine

5‧‧‧ Painting editing device

6‧‧‧Communication line

Claims (9)

A programmable display is a programmable display connected to a connected device, characterized in that: a communication processing means reads data held in a memory area of the connected device; and the item display means is based on The data read by the communication processing means displays each item indicating the various states of the connected device; and the error notification means corresponds to the failure of the reading processing of the data by the communication processing means. The above items related to the read failure are displayed, and the determined error image is displayed. The programmable display according to the first aspect of the invention, wherein the memory device is assigned an arbitrary memory area of the connected device in advance; the communication processing means is configured to be assigned as each of the items. The data held in the allocated memory area of the memory area of the item; the error notification means displays the error image corresponding to all items in which the data of the assigned memory area has failed to be read. A programmable display as described in claim 2, further comprising a shared memory; the communication processing means corresponding to each of the foregoing items, The read data of the data read in the allocated memory area is stored in the shared memory, and when the data reading fails, the determined error information is stored in the shared memory; and the item display means is stored in the shared memory. The read data of the memory is displayed to display the item; the error notification means is configured to display the error image in accordance with the display of the items corresponding to the error information stored in all of the shared memory. The programmable display according to claim 3, further comprising: a screen data storage means for storing information indicating the image and the display position coordinate and the assigned memory area in advance for each of the items; and The error image memory means pre-memorizes the predetermined error image, and the error notification means determines the display position of the error image based on the display position coordinates for the item in which the error information is stored. The programmable display according to the third or fourth aspect of the invention, wherein the error notification means displays a part of the error image superimposed on an image of the item in which the error information is stored. A programmable display is connected to one or more connected devices, and at least one or more items indicating various states of the connected devices The image is displayed on the screen, and is characterized in that: the communication processing means reads the stored data of the predetermined memory area in the connected device associated with the item for each of the items; The display means is a means for displaying an image of each of the items, and displaying the item image based on the stored data read from the predetermined memory area; and the error notification means is an arbitrary item caused by the communication processing means When the reading process of the stored data in the predetermined memory area is failed, the predetermined error image is displayed corresponding to the item image of the arbitrary item. A program characterized in that a computer for connecting to a programmable display of a predetermined connected device has a function of: a communication processing means for reading data held in a memory area of the connected device; an item display And means for displaying, according to the data read by the communication processing means, items indicating various states of the connected device; and error notification means for reading the data by the communication processing means In the case of failure, the specified error image is displayed for the aforementioned item related to the read failure. A program characterized in that a computer for displaying a portrait of one or more items connected to one or more connected devices and displaying at least one of the various items of the connected devices on the screen is provided with a program The function of the following means: the communication processing means reads the stored data of the predetermined memory area in the connected device according to the item corresponding to each of the items, and the item display means is a means for displaying the image of each item mentioned above. And displaying the item image according to the stored data read from the predetermined memory area; and the error notification means for reading the stored data of the predetermined memory area related to any item caused by the communication processing means In the case of a failure, the image of the above item corresponding to an arbitrary item is displayed, and the determined error image is displayed. An access error notification method is connected to a predetermined connected device, accesses a memory area of the connected device, reads data held in the memory area, and displays items indicating various states of the connected device. The access error notification method of the programmable display device is characterized in that, when the reading of the data held by the memory area of the predetermined connected device fails, the predetermined error image is displayed corresponding to the item related to the read failure.