WO2014083646A1

WO2014083646A1 - Programmable indicator and program

Info

Publication number: WO2014083646A1
Application number: PCT/JP2012/080792
Authority: WO
Inventors: 欣史古山
Original assignee: 発紘電機株式会社
Priority date: 2012-11-28
Filing date: 2012-11-28
Publication date: 2014-06-05
Also published as: JP5970080B2; JPWO2014083646A1; TWI594095B; TW201439698A; CN104106014B; CN104106014A

Abstract

A communication processing unit (44) reads out data from a predetermined storage area assigned for each item in memory within a connected apparatus (4) and stores the same in shared memory. At the time, in a case of failure of data readout related to an arbitrary item, error information related to the item is stored in the shared memory. An item processing unit (43), in relation to the item for which the error information has been stored, displays error display image data (47) corresponding to the item image.

Description

Programmable display, program

The present invention relates to a programmable display.

In general, a programmable display is connected to various connected devices such as a PLC main body and a temperature control device, and items such as numerical displays and lamps for displaying the status of these connected devices, and for users to give arbitrary instructions. Displays an image of items such as switches. An item is also called a screen component or the like. Usually, images of a plurality of screen components (items) are displayed on the screen of the programmable display (referred to as an operation display screen). Data or the like for displaying such an operation display screen (referred to as screen data or the like) is arbitrarily created in advance by a developer or the like in a support device (not shown) and downloaded from the support device to a programmable display. .

The screen data includes, for each item, data such as an image of the item (switch image or lamp image), display position coordinates, and an address (assigned memory address) of a predetermined area of the external memory described later. It is. In addition, some programs may be included.

Each of the above items, for example, displays the status of the component corresponding to an arbitrary component of an arbitrary connected device, or accepts an ON / OFF instruction for the component. For example, in the case of an item that displays the temperature measurement value of the temperature control device as a numerical value, the current temperature is displayed as a numerical value as needed.

The display control related to the various items is realized by, for example, periodically executing predetermined processing for each item. The predetermined processing is, for example, reading stored data in the predetermined area (allocated memory) of a memory device (external memory) in the connected device, and determining / displaying the display contents of the item based on the stored data. Is. The connected device updates the stored data in a predetermined area of the external memory as needed (for example, the temperature measurement value is updated as needed in the temperature control device).

Further, the data read from the external memory is temporarily stored in a predetermined area of a memory device (referred to as internal memory) in the programmable display, and the display contents of the item are determined and displayed based on the stored data. There is also a configuration.

In the case of this example, the process of reading out the data stored in the external memory and storing it in the internal memory is executed, for example, periodically by a predetermined functional unit of the programmable display (here, a communication unit not shown). The communication unit communicates with various connected devices such as the PLC main body and the temperature control device, for example, acquires data stored in a predetermined storage area of the external memory in the connected device, and stores the data in the internal device Overwrite and store in a predetermined area of memory. And the function part (it shall be called an item display part) which performs the display control which concerns on the said various items in a programmable display controls an item display content by accessing an internal memory regularly.

However, the data acquisition process of the external memory fails if there is a communication error with the connected device, or if there is any abnormality (including temporary memory) in the external memory itself or its specified storage area. There is. In such a case, since the communication unit can recognize the connected device of the communication partner, the item display unit displays a window for notifying an error such as “occurrence of communication error with the PLC main body” on the screen. And cautioned the user.

Further, for example, Patent Document 1 discloses that an external video is displayed as an overlay on the original operation screen.
JP 2002-140104 A

As described above, conventionally, a communication error with a connected device is detected and a warning is displayed. This can be said to warn that the display content of the item related to the connected device in which a communication error or the like has occurred is in an unreliable state (not the current value, etc.).

However, it is not always possible for the operator to discriminate unreliable items by looking at this display. For example, it is not always possible to determine which item (one or more) is an item for displaying the status related to the temperature control device by looking at the display of “communication error with temperature control device”. Furthermore, when only the data in a predetermined storage area of the external memory has an acquisition error, it is not possible to display an error for an item related to this storage area.

An object of the present invention is to specify the item and display an error corresponding to the item display when the memory data associated with an arbitrary item cannot be obtained for some reason. It is to provide a programmable display or the like that can distinguish an abnormal item display at a glance.

The programmable display of this invention is a programmable display connected to a predetermined connection apparatus, Comprising: It has a communication processing means, an item display means, and an error notification means.
The communication processing means reads the data held in the storage area of the predetermined connected device.

The item display means displays each item indicating various states of the predetermined connected device based on the data read by the communication processing means.
The error notification means displays a predetermined error image corresponding to the item related to the reading failure when the data reading process by the communication processing means fails.

It is a schematic block diagram of the whole system containing the programmable display of this example. It is a structural example of the programmable display of this example. It is a software block diagram of this system. It is an example of an operation display screen when an error occurs. It is a processing function figure of the programmable display of this example. It is a specific example regarding a shared memory, (a) is a data structure example, (b) is a data storage example. It is a process flowchart figure of a communication process part. It is a process flowchart figure of an item process part. (A)-(c) are various data block diagrams.

Embodiments of the present invention will be described below 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 includes various connection devices 4 and a programmable display 1 that is connected to the various connection devices 4 via a communication line 6. Furthermore, the structure by which the programmable display 1 was connected to the drawing editor apparatus 5 via the communication line 3 may be sufficient. However, the drawing editor device 5 is not necessarily required (only an example is shown).

The programmable display 1 is provided with a plurality of communication interfaces 2 (communication ports), and is connected to various connection devices 4 and the drawing editor device 5 by the communication line 3 / communication line 6 connected to each communication interface 2. ing.

FIG. 2 is a configuration example of the programmable display 1 of this example.
The programmable display device 1 has a function of displaying the operation display screen based on the above-described screen data and the like in substantially the same manner as the above-described conventional example, but further, an item related to the error when a specific error occurs It has a function of displaying a specific mark or the like corresponding to the display. Details will be described later.

The illustrated programmable display 1 includes a display operation control device 10, a touch panel 18, a display 19, the communication interface 2, and the like.
The display operation control device 10 includes a CPU 11, a ROM 12 (flash memory or the like), a RAM 13, a communication controller 14, a graphic controller 15, a touch panel controller 16, and the like, which are connected to a bus 17.

The CPU 11 is a central processing unit (arithmetic processor) that controls the entire display operation control device 10. The CPU 11 performs a predetermined calculation operation (processing) by executing a program (for example, a main body program 21 described later) stored in the ROM 12 in advance. For example, the processing described in FIG. 5, FIG. 7, FIG. Various calculation results are stored in, for example, the RAM 13 or the ROM 12.

The ROM 12 stores the screen data (screen data 22 described later) and the like described in the background art. As described above, the screen data includes, for each item such as the above-described switch, lamp, etc., data related to display such as an image of the item, display position coordinates and size, and the allocated memory address (allocated memory area). Data relating to memory access, etc.

The processing of the CPU 11 includes, for example, processing for acquiring “storage data such as an allocated memory address for each item” (storage data in a predetermined area of the external memory) described in the background art. This acquired data is temporarily stored, for example, in the shared memory 45 described later. Note that the shared memory 45 may be a part of the storage area of the RAM 13 or the ROM 12 or may be another memory (not shown).

Further, display target data based on, for example, the screen data or the acquired data is developed (drawn) on, for example, the RAM 13 (or a video RAM (not shown)) by the processing of the CPU 11. Based on this drawing, the graphic controller 15 displays the above-described operation display screen on the display 19. For example, when a lamp is taken as an example, the screen data includes a turn-off image and a turn-on image. If the acquired data is “0”, the turn-off image is displayed. It becomes data.

It should be noted that the display processing itself of the operation display screen based on the screen data and the acquired data may be substantially the same as the conventional one. In this method, in addition to such display, a specific mark (! Etc.) to be described later may be displayed.

That is, the contents of the acquired data (stored data in a predetermined area of the external memory) may be reflected in the display contents of the operation display screen as described above. For example, in the case of the above lamp, it is assumed that the stored data is changed to ‘0’ while the lighting image is displayed because the acquired data at a certain time is ‘1’. However, if acquisition of the stored data fails for some reason, the lit image remains displayed even though it must be switched to the extinguished image.

In this method, the lighting image is still displayed in such a case. However, a specific mark (! Or the like) described later is displayed in correspondence with this lighting image (overlaid on this lighting image; or near this lighting image). As a result, the operator or the like can recognize that the display of the lighting image may be wrong (does not reflect the current state; it remains in the past state).

The display 19 is made of, for example, a liquid crystal panel, and a touch panel 18 is provided so as to overlap the liquid crystal panel. On the display 19, the operation display screen is basically displayed in which a plurality of item images are arranged at predetermined positions. However, in the case of this method, a specific mark (! Etc.) may be further displayed as described above.

Further, the communication controller 14 performs communication (data transmission / reception etc.) with the connection device 4 and the drawing editor device 5 such as a PLC main body (not shown), a temperature control device, etc.

The detection result of the pressing operation (touch) position on the touch panel 18 by the operator or the like is taken into the CPU 11 or the like via the touch panel controller 16 and analyzed. For example, analysis is performed based on the display position coordinates and size data of each item. For example, when an operator or the like touches the display position of the image of the switch, the CPU 11 or the like analyzes that an operation on the switch has been performed.

FIG. 3 shows a software configuration diagram of the system.
In the programmable display 1, various programs / data such as a main body program 21, screen data 22, and communication program 23 are stored in, for example, the ROM 12 (flash memory or the like). The CPU 11 reads / executes / references these programs / data, etc., thereby performing display control of the operation display screen for the programmable display. This operation display screen includes the above-described numerical display, image display of various items such as lamps, switches, and the like. The display content of each item image is, for example, data acquired from each connected device 4 (external memory; allocated memory area) ( It is updated from time to time to reflect the above acquired data.

Basically, the CPU 11 performs processing based on the main body program 21 and the screen data 22, whereby the operation display screen is displayed. The display contents of each screen component on this operation display screen (numerical display such as temperature, lighting / extinguishing of lamp, etc.) are shown in the communication result with each connected device 4 by the communication program 23 (the acquired data etc.). Based on this, it is updated as needed.

The screen data 22 is stored, for example, by downloading a screen data file 32 arbitrarily created in advance on the drawing editor device 5 side to the programmable display device 1. Also, the communication program 23 is a program in which, for example, a communication program file 33 (part thereof) stored in advance on the drawing editor device 5 side is downloaded and stored in the programmable display device 1.

As described above, basically, the CPU 11 performs display control of the operation display screen based on the main body program 21, screen data 22, acquired data, and the like. For example, regarding an item such as a numerical display or a lamp, data is periodically read from the allocated memory area of the item, and the display content of the item is updated based on the read data. Alternatively, for example, regarding an item such as a switch, when a user touches a desired switch on the operation display screen (when an ON / OFF operation is performed), switch ON image display / switch OFF image display is performed. The CPU 11 also controls the connection device 4 according to the switch operation.

The allocated memory area corresponds to a predetermined storage area (allocated memory address) of the external memory in the background art. Hereinafter, a memory corresponding to the external memory is referred to as “device memory”. A memory corresponding to the internal memory is referred to as a “display memory”.

Note that, as already described above, the “device memory” (external memory) is a memory provided in the connected device 4 and is used for memory allocation of each item. As described above, the display content of each item is determined and updated based on the stored data in the allocated memory area.

As described above, 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 based on this. There is a configuration.

That is, for example, a process of periodically reading data from a predetermined storage area of a memory device (equipment memory) in the connection device 4 and storing the read data in the display device memory by each communication processing unit 44 described later. Is done. Then, display control of the operation display screen is performed based on data stored in the display memory. As a result, the display contents of each item image on the operation display screen reflect the contents of the latest stored data in the allocated memory area corresponding to the item.

However, if the stored data in the allocated memory area of any item cannot be obtained for some reason, the display content of the item image does not reflect the latest data (and therefore has low reliability). There is a possibility. When the cause is a communication error, there is a possibility that the display contents of all the items related to the connection device 4 of the communication partner that caused the error may be unreliable. Conventionally, as described above, even if an operator can know that an error has occurred, it has been difficult to determine which item image display content has low reliability. On the other hand, according to this method, anyone can easily recognize which item image display content has low reliability.

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, each connected device 4 has a communication protocol (communication rule) unique to each model and performs communication between the programmable display 1 and the connected device 4 in accordance with this communication rule. Therefore, the communication program 23 needs to be developed for each model of each connected device 4. Of course, the CPU 11 and the like execute the communication program 23 to realize communication processing with the connected device 4.

The communication between the programmable display 1 and the drawing editor device 5 is performed by, for example, the main body program 21 and the drawing editor 31 (a communication function is incorporated in the drawing editor 31). This is not particularly relevant and will not be shown or described. The connection device 4 such as the PLC main body has various manufacturers and models, each manufacturer / model has its own communication program, and the communication program 23 depends on the manufacturer / model of the connection device 4 depending on the case. Multiple types will be provided.

The communication program 23 is normally stored in advance as a plurality of communication program files 33 (a plurality of communication programs developed for each model) in an HD (hard disk) (not shown) in the drawing editor device 5. Then, when the user selects / designates an arbitrary connected device 4 using the drawing editor 31, the drawing editor device 5 transfers the communication program file 33 corresponding to the selected connected device 4 to the programmable display device 1, The communication program 23 is stored.

Access to the device memory in the connected device 4 is performed by various settings of the drawing editor 31 (settings when creating the screen data file 32).
For example, when the user arranges a numerical display item in the screen at the time of creating the screen data file 32 and designates an arbitrary address of the device memory with respect to the numerical display item, the programmable display device 1 has the designated address of the device memory. You can set the operation to read and display data periodically. In other words, if this screen data file 32 is downloaded to the programmable display device 1 and used as the screen data 22, the programmable display device 1 periodically reads the data at the specified address in the device memory (further acquired data). Are temporarily stored in the display memory), and numerical values are displayed on the screen based on the acquired data.

A program for realizing various processes such as access to the device memory, temporary storage of acquired data, and screen display may be included in the main body program 21, for example, or the screen data file 32 (screen data 22). May be included. In any case, when the CPU 11 executes such a program, for example, the above-described various operations (or operations described in FIGS. 5, 7, and 8 described later) are realized.

Alternatively, when the screen data file 32 is created, for example, when a switch is arranged in the screen and an arbitrary address of the device memory is designated as an output memory, the device is displayed when the switch is pressed on the display operation screen of the programmable display 1. You can set the operation to write to the specified memory address.

In any case, the access processing to the device memory and the update processing of the item display content itself may be substantially the same as the conventional one. In this method, a specific mark (! Or the like), which will be described later, may be displayed on the operation display screen (for example, when a communication error with an arbitrary connected device 4 occurs). This will be described in detail below with reference to FIG.

FIG. 4 shows an example of the operation display screen when a specific error occurs in the programmable display 1 of this example.
The specific error is a failure in reading data (data acquisition) from the allocated memory area of the device memory related to an arbitrary item, and may be caused by a communication error with the connected device 4, for example. Corresponding to the image display of the item related to the data acquisition failure, it is one of the features of the present method to display a specific mark registered in advance (here, the! Mark shown in the figure).

In the example shown in FIG. 4, a specific mark (!), Which is an example of a predetermined error image, is displayed so as to partially overlap each item image shown. However, the present invention is not limited to this example. For example, a specific mark (!) May be displayed near each item image. In any case, the specific mark (!) Is displayed in correspondence with the image display of the item related to the data acquisition failure.

The predetermined error image is, for example, some kind of still image, and an example of this still image is the above “!”. Of course, the predetermined error image is not limited to this example, and is any kind of still image registered in advance. Good. The predetermined error image is not limited to a still image, and may be a moving image, a photograph, a sentence, an animation, or a combination thereof. In the present invention, a certain still image, a pre-registered still image, a moving image, a photograph, a sentence, an animation, or a combination thereof is defined as a predetermined error image (also referred to as an error image).

In the illustrated example, three types of item images are shown, but since the specific mark (!) Is displayed on all, the user is in a state where the display contents of all the three item images are unreliable, for example. Can be recognized.

Alternatively, although not shown, there may be a case where a specific mark (!) Is displayed corresponding to only one item image of three types of item images. In the case of this example, the display content of this one item image is in an unreliable state, but the display content of the remaining two item images can be recognized as being in a reliable state.

FIG. 5 is a processing function diagram of the programmable display of this example.
When the CPU 11 executes a predetermined program (for example, the main body program 21, the communication program 23, etc.) stored in the ROM 12, for example, various processing function units shown in a dotted line in FIG. 5 are realized. That is, the following processing functions of various processing function units such as the item generation unit 41, the item processing schedule unit 42, the item processing unit 43, and the communication processing unit 44 (44-1, 44-2, etc.) shown in the figure are realized.

Note that, 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 executing the processing of these processing functions, the screen data 22 and the error display image data 47 shown in the figure are used. The error display image data 47 is the specific mark (in this example!) Stored in advance in the ROM 12 or the like in this example, but is not limited to this example.

The item generation unit 41 generates an item list 46 based on the screen data 22 or the like. This is generated, for example, by extracting a part of the screen data 22 (further, a processed flag 67 described later is added).

Here, FIG. 9A shows a data configuration diagram of the item list 46.
The item list 46 in the illustrated example includes data items of item type 61, coordinates 62, size 63, device name 64, address 65, “data for each item type” 66, and processed flag 67. Except for the processed flag 67, it may be regarded as the same as the conventional one, and will be briefly described below.

The item type 61 stores item type identification information indicating the type of the item (switch, lamp, numerical display, etc.).
“Data for each item type” 66 stores accompanying information such as image data of the item (item image; an image of any switch if the item type is a switch). Data indicating the display position and size of the item image on the screen is stored in the coordinates 62 and size 63. These are data related to image display on the operation display screen of each item.

The device name 64 and the address 65 are memory allocation information related to each item, and correspond to the allocated memory address. That is, the storage area indicated by the address 65 in the memory indicated by the device name 64 is an area assigned to the item (the assigned memory area). For example, if the item type 61 is a lamp, flag data indicating lighting / extinguishing of the lamp is stored in this storage area. The memory indicated by the device name 64 is the device memory (memory in any connected 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. That is, the item processing schedule unit 42 periodically calls the item processing unit 43, for example, and executes, for example, the processing of FIG. 8 described later (in other words, the processing of FIG. 8 is executed cyclically).

The item processing unit 43 executes processing (processing as an item display unit) related to updating the display contents of the image for each item based on the item list 46 and data stored in the shared memory 45 described later. To do. At this time, the present technique further displays a specific mark (!) In some cases.

That is, the item processing unit 43 corresponds to the image display of an item related to a specific error (data acquisition failure related to item display; for example, a communication error with the connected device 4 or the like) (for example, a partly overlapping form). And) processing for displaying the error display image data 47 (specific mark (!)) (Processing as error notification means) is also performed. Details will be described later using a specific example of data stored in the shared memory 45 shown in FIG. The shared memory 45 corresponds to the display memory.

Further, the item processing unit 43 draws (decompresses) each item image on the RAM 13. At that time, depending on the type of item, the acquired data is also drawn (developed) on the RAM 13 together. As a result, the graphic controller 15 displays the drawing data on the display, whereby the display operation screen is displayed. This drawing data is updated by the item processing unit 43 as needed, for example, every time processing shown in FIG. In some cases, the specific mark (!) Or the like is also drawn, resulting in a display as shown in FIG. 4, for example.

The communication processing unit 44 is a communication processing unit 44-1 or 44-1 (communication processing unit) provided corresponding to each connected device 4 (4-1 or 4-2). That is, the illustrated communication processing unit 44-1 communicates with the connected device 4-1 via the communication line 6 using the communication port WAY1 corresponding to the connected device 4-1, and the device memory Stored data in a predetermined area (allocated 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 performs communication with the connection device 4-2 via the communication line 6 using the communication port WAY2 corresponding to the connection device 4-2. Data stored in a predetermined area (allocated memory area) of the memory is acquired. The acquired data is overwritten and stored in a predetermined area of the shared memory 45.

The acquisition processing of the storage data in the allocated memory area and the storage processing itself in the shared memory may be substantially the same as in the past. However, in the case where there is further data acquisition failure in this method, the shared memory 45 Record error information in the corresponding area. This corresponding area is a column of error information 55 to be described later of the corresponding record on the shared memory 45 related to this item when there is a data acquisition failure related to an arbitrary item, for example.

Thus, in the subsequent drawing process on the RAM 13 by the item processing unit 43, the specific mark (!) Is drawn for an item for which data acquisition has failed. As a result, a specific mark (!) Is displayed on the operation display screen corresponding to the image of the item for which data acquisition has failed.

FIG. 6 shows a specific example of the shared memory 45.
FIG. 6A shows a data structure example of the shared memory 45, and FIG. 6B shows a data storage example.
In the example shown in FIG. 6A, the storage data 50 of the shared memory 45 includes data items of a port 51, a device name 52, an address 53, data 54, and error information 55. Of these, data items other than the error information 55 may be substantially the same as in the past. Therefore, a brief description will be given below.

The port 51 is identification information or the like of the communication port, and is substantially information for identifying the connection device 4 of the communication partner. The device 52 is identification information of a memory device (device memory) in the connection device 4 of the communication partner. The address 53 is an address of a predetermined storage area in the device memory indicated by the device 52, and the data 54 stores data acquired from this storage area.

It should be noted that the port 51, the device name 52, and the address 53 may be regarded as corresponding to the “allocated memory address” of each item. That is, each record shown in FIG. 6B corresponds to each item. By storing the allocated memory address for each item included in the screen data 22 or the like in the port 51, the device name 52, and the address 53, each record shown in FIG. 6B is generated. At that time, a link between the record and the item is formed. As a result, when a display update process or the like of an arbitrary item is performed, a record corresponding to this item is referred to in the shared memory 45.

In the error information 55, information indicating the occurrence of a specific error may be stored by the communication processing unit 44. That is, when the communication processing unit 44 fails to obtain data from the allocated memory area related to an arbitrary item, the communication processing unit 44 includes information indicating the occurrence of a specific error in the error information 55 in the corresponding record of the item in the shared memory 45 (illustration shown). "Error") is stored.

From the above, when the record for an item is the second record in the example shown in FIG. 6B, the address 200 in the memory device D of the connected device 4-1 is the “allocated memory address” of this item. In the illustrated example, the current stored data of this “allocated memory address” is “1000”. However, when the error information 55 is “error”, this numerical value is not always correct.

For example, in the case of the first record in the example shown in FIG. 6B, it is shown that the data “12345” is stored at the address 100 in the memory device D of the connected device 4-1. It is not always correct information. This is because “error” is stored in the error information 55 of the first record.

That is, the communication processing unit 44-1 tried to acquire data from the address 100 of the memory device D of the connected device 4-1, but the data acquisition failed due to a communication error or the like, so the error of the first record Information 55 stores “error” as illustrated. In this case, the data '12345' may be old data, not current data. In this method, in such a case, for example, a specific mark (!) Is displayed, for example, partially overlapping on the image display of an item corresponding to the first record (for example, it can be determined by the link). As a result, the operator or the like can recognize that “12345” displayed on the screen may not be a correct value.

For example, the item processing unit 43 periodically refers to the corresponding record in the shared memory 45 for each item, as shown in FIG. Processing for determining and updating the display content of the item image is performed. Although this process itself may be substantially the same as the conventional one, the item processing unit 43 of this example further refers to the error information 45 and performs a process based on this.

In other words, if the error information 55 is “normal”, the item processing unit 43 only performs the same processing as the conventional one. On the other hand, when the error information 55 related to an arbitrary item is “error”, the item processing unit 43 places the error display image data 47 (specific mark (!)) At the display position of the image of the item, for example. The item image is displayed so as to overlap (for example, displayed as in the example shown in FIG. 4). However, this is an example, and the present invention is not limited to this example.

FIG. 7 is a processing flowchart of the communication processing unit 44.
For example, in the example of FIG. 5, each of the communication processing units 44-1 and 44-2 executes the process of FIG. 7 cyclically (at a regular cycle).

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

FIG. 9B shows a data configuration example of the memory list 101.
In the illustrated example, the memory list 101 includes data items of a device name 71, an address 72, data 73, and error information 74. For example, in the case of the example of the communication processing unit 44-1, all records whose port 51 is “WAY 1” are extracted from the shared memory 45, and the device name 52, address 53, data 54, error information 55 of each extracted record are extracted. Is stored in the device name 71, the address 72, the data 73, and the error information 74, the memory list 101 related to the connected device 4-1 is generated. The data 73 and the error information 74 are not necessarily required. Instead, flag information indicating whether or not the processing has been completed may be stored.

Thereafter, while referring to the generated memory list 101, the processes in steps S2 to S7 are repeatedly executed until the determination in step S7 becomes NO.
That is, an unprocessed record is taken out from the memory list 101 (as a process target record), and a memory read command based on the contents of this record is generated and transmitted to the connected device 4 in charge via the communication line 6 ( Step S2). Then, it waits for a response from the connected device 4 to this command (step S3). This command includes information (allocated memory address) for specifying an access destination such as the device name 71 and address 72, and the connected device 4 reads data from the storage area indicated by the allocated memory address, and reads the read data. The response process is sent back. However, if data read fails for some reason, a memory read error or the like is returned.

For example, when there is no response even after a predetermined time has elapsed from the time of command transmission (such as a communication error), or when the response content is a memory read error or the like, the communication processing unit 44 generates a specific error. It is determined that it has occurred (step S4, YES), and "error" is stored in the column of the error information 55 in the record corresponding to the processing target record in the shared memory 45 (step S6).

On the other hand, when there is a normal response from the connected device 4 (step S4, NO), the read data included in this response is stored in the column of the data 54 in the record corresponding to the processing target record in the shared memory 45. Store (step S5). At this time, if “error” is stored in the error information 55 column, it is cleared (or “normal” is stored).

Then, after executing any of the processes in steps S5 and S6, it is checked whether or not an unprocessed record remains in the memory list 101. If it remains (YES in step S7), the process returns to step S2. If it does not remain (step S7, NO), this process ends.

FIG. 8 is a processing flowchart of the item processing unit 43.
As described above, the processing in FIG. 8 is cyclically executed under the management of the item processing schedule unit 42.

In the processing example of FIG. 8, the item processing unit 43 first executes an initialization process of the item list 46 (step S11). For example, the processed flag 67 of all records in the item list 46 is set to “unprocessed”. Thereafter, the processes in steps S12 to S19 are repeatedly executed until NO in step S19 described later.

That is, in the item list 46, an arbitrary record among the records in which the flag 67 is “unprocessed” is set as a processing target record, and the device name 64, the address 65, etc. are obtained by referring to the processing target record (step S12), using these, the corresponding record in the shared memory 45 is searched and its data is acquired (step S13). That is, for example, a record whose device name 52 and address 53 are the same as the device name 64 and address 65 is the corresponding record. Then, the data 54 and error information 55 of the corresponding record are acquired as memory information 102 (step S13).

The memory information 102 includes data 81 and error information 82 shown in FIG. 9C, which are the acquired data 54 and error information 55 described above.
Based on the memory information 102, it is determined whether or not a specific error (communication error, memory read error, etc.) has occurred (step S14). This is determined by whether the error information 82 is “error” or “normal”. Naturally, if the error information 82 is “error”, it is determined that a specific error has occurred (step S14, YES), 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.

If there is no specific error (step S14, NO), the conventional display process is performed. That is, a normal item drawing process (for example, expanding on the RAM 13) using the data 81 and information of the processing target record (item image, coordinates, size, etc.) is performed (step S15).

On the other hand, when there is a specific error (step S14, YES), an item drawing process at the time of an error by this method using the information of the processing target record and the error display image data 47 is performed (steps S16 and S17). In this process, first, a process of determining the display position coordinates of the error display image data 47 (specific mark (! Etc.)) is performed (step S16).

The processing in step S16 itself may be various, but basically, the specific mark (!) Is obtained by using a predetermined offset value determined in advance based on the coordinates 62 (= X, Y). Determine the display position coordinates. For example, since the coordinates 62 are often the coordinates of the upper left corner of the item display area, when a specific mark (!) Is to be displayed at the upper right corner of the item display area, for example, the “width” of size 63 is used. , (X + width, Y) may be the display position coordinates of the specific mark (!).

Then, a process of drawing the specific mark (!) At the coordinates determined in step S16 (for example, developing on the RAM 13) is performed (step S17). Before that, the item drawing process similar to step S15 may be performed, but this process may not be performed.

Note that, as already described, the graphic controller 15 displays the drawing data on the RAM 13 on the display. Therefore, in the processing example described above, a specific mark (!) Is displayed in the upper right corner of the image of the item in which the specific error has occurred.

In this way, by specifying the item in which the specific error has occurred and displaying the specific mark (!) In correspondence with the image of this item (overlapping; or in the vicinity), the operator etc. at a glance, It can be recognized that the content of the item image is not reliable.

When the execution of step S15 or steps S16 and S17 is completed, the flag 67 of the process target record in the item list 46 is changed to “processed” (step S18).

If an unprocessed record remains in the item list 46 (step S19, YES), the process returns to step S12. If all the records have been processed (step S19, NO), this process is terminated.

As explained above, according to the programmable display 1 etc. of this example, when acquisition of the memory data associated with an arbitrary item becomes impossible due to some reason, this item is specified and By displaying the corresponding error, the operator can identify an abnormal item at a glance.

Claims

A programmable display connected to a predetermined connection device,
Communication processing means for reading data held in a storage area of the predetermined connected device;
Item display means for displaying each item indicating various states of the predetermined connected device based on the data read by the communication processing means;
When the data read processing by the communication processing means fails, an error notification means for displaying a predetermined error image corresponding to the item related to the read failure;
A programmable display device comprising:
Arbitrary storage area of the connected device is allocated to each item in advance,
The communication processing means reads, for each item, data held in an allocated storage area that is the storage area allocated to the item,
2. The programmable display device according to claim 1, wherein the error notification unit displays the error image in correspondence with all items for which data reading from the allocation storage area has failed.
Further having shared memory,
The communication processing means stores read data, which is data read from the allocation storage area, for each item in the shared memory, and stores predetermined error information in the shared memory when the data read fails. And
The item display means displays the item based on the read data stored in the shared memory,
3. The programmable display device according to claim 2, wherein the error notification unit displays the error image corresponding to the display of each item for all items in which the error information is stored in the shared memory. .
Screen data storage means in which information indicating the image, display position coordinates, and the allocated storage area is stored in advance for each item.
Error image storage means for storing the predetermined error image in advance,
4. The programmable display device according to claim 3, wherein the error notification unit determines a display position of the error image based on the display position coordinates of each item in which the error information is stored.
The programmable display device according to claim 3 or 4, wherein the error notification means displays the error image partially overlapping the image of the item in which the error information is stored.
A programmable display that is connected to one or more connected devices and displays an image of at least one item that displays at least various states of each connected device on a screen,
Communication processing means for reading stored data in a predetermined storage area in a predetermined connected device related to the item for each item;
Means for displaying an image of each item, item display means for displaying the item image based on the stored data read from the predetermined storage area;
An error notification means for displaying a predetermined error image corresponding to the item image of the arbitrary item when the reading processing of the data stored in the predetermined storage area relating to the arbitrary item by the communication processing means fails;
A programmable display device comprising:
A programmable display computer connected to a predetermined connection device,
Communication processing means for reading data held in a storage area of the predetermined connected device;
Item display means for displaying each item indicating various states of the predetermined connected device based on the data read by the communication processing means;
An error notification means for displaying a predetermined error image corresponding to the item related to the read failure when the data read process by the communication processing means fails;
Program to function as.
A programmable display computer connected to one or more connected devices and displaying an image of at least one item displaying at least various states of each connected device on a screen;
Communication processing means for reading stored data in a predetermined storage area in a predetermined connected device related to the item for each item;
Means for displaying an image of each item, item display means for displaying the item image based on the stored data read from the predetermined storage area;
An error notification means for displaying a predetermined error image corresponding to the item image of the arbitrary item when the reading processing of the data stored in the predetermined storage area relating to the arbitrary item by the communication processing means fails;
Program to function as.
A programmable display that is connected to a predetermined connection device, accesses a storage area of the predetermined connection device, reads data held in the storage area, and displays each item indicating various states of the predetermined connection device An access error notification method,
An access error notification method, comprising: displaying a predetermined error image corresponding to the item related to the read failure when reading of data held in the storage area of the predetermined connected device fails.