JPH113202A - Programmable display - Google Patents

Abstract

(57) [Summary] To be connected to a predetermined external device 10 via a communication path 12 and to enable data transfer between the external device 10 and the memory means 14 through the communication path 12, Display contents of an error message in a program type display device which sequentially decodes processing instruction words provided in the event data storage means 18 and enables display on the display screen 20 corresponding to information referred to by each processing instruction word Can be grasped intuitively. SOLUTION: In a fixed message corresponding to the content of an error, information for specifying a storage location of variable information related to the error is previously written, and both are displayed at the time of actual display on a display screen 20. The combined information is displayed in a series of the fixed information and the variable information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the transfer of an arbitrary coordinate position on a display screen of a display between various external devices such as a general-purpose computer and a programmable logic controller (hereinafter referred to as "PLC"). The present invention relates to a programmable display device for displaying a screen for operating an external device composed of figures, graphs, numbers, characters, etc., based on data obtained by the method.

[0002]

2. Description of the Related Art Conventionally, in a programmable display device of this kind, in conjunction with the turning on of a predetermined bit in a PLC, a predetermined setting such as an error message specified by the bit position is performed. The displayed contents are displayed on a screen to call attention to an operator.

[0003]

However, since the above-mentioned display has a fixed content, it is only obvious that an abnormality has occurred. It was difficult to respond quickly in an emergency, for example, to judge.

[0004] The present invention has been made in view of such a problem, and enables display of fixed contents as well as related variable contents so that the displayed contents can be easily grasped visually. It is an object of the present invention to provide a programmable display device.

[0005]

A program type display device 28 according to the present invention is connected to a predetermined external device 10 via a communication path 12 as schematically shown in FIG. A data communication unit 16 that enables data to be transferred to and from the memory unit 14 of the external device 10 through the communication path 12 in correspondence with, for example, the state data storage unit 27; Event data storage means 18 capable of storing a plurality of processing directives including information for identifying the processing directives, and sequentially decodes the processing directives provided in the event data storage means 18 to store information referred to by each processing directive. A data display unit 22 that enables display on the corresponding display screen 20.

[0006] The above-mentioned processing instruction word is the first data 24.
The fixed data such as an error message set in advance corresponding to the change in the contents can be displayed on the display screen 20. In the fixed data, one or a plurality of second data It is characterized in that variable data corresponding to the current contents of 26 are displayed in series.

[0007] Further, as shown in FIG.
The fixed data is displayed in conjunction with the turning on or off of the bit at the predetermined address position of the external device 10, and the second data 26 is specified corresponding to the display position of the variable data in the fixed data. By filling in the address in advance, it is possible to display fixed data and variable data in series.

The second data 26 may be numerical data, and the second data 26 may be displayed as it is in fixed data in a predetermined format, or may be a bit data in the fixed data. It is also possible to configure so that data corresponding to the content corresponding to the content is displayed.

A plurality of sets of the first data 24 and the fixed data corresponding to the first data 24 are set, and the display operation is performed on the display screen 20 in chronological order in the order in which the content change in the first data 24 occurs. It is preferably performed.

[0010]

As described above, according to the present invention, it is possible to intuitively grasp the details of the displayed contents by displaying the fixed contents and the variable contents related to the fixed contents in series. Furthermore, in addition to displaying the additional information as it is, by converting it to the corresponding content and displaying it, a more varied display is possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a programmable display device 28 according to the present invention will be described with reference to FIG.
An example in which the C32 is connected as an external device to perform display and control corresponding to the state data MD handled therein will be described. However, the present invention is not limited to this. Even a display and control operation performed by an external device can be performed by a substantially similar configuration.

The programmable display device 28 according to the present invention.
Is integrated with the console of the target system 30 or the like together with the PLC 32, or is provided independently, and is used as creation, operation, and display of various data for the target system 30.

Here, the PLC 32 is realized as a whole PLC 32 by unitizing a circuit for each required function and connecting the respective units in parallel via a bus line 34 as necessary. The configuration is substantially the same as that of the related art in which the number of functions can be increased or decreased.

In this embodiment, a CPU unit 36 for controlling the whole of the PLC 32, an input unit 38 for directly taking in a detection signal sent from the target system 30, and a Output unit 4 that enables output of a predetermined control signal
0, a memory unit 42 for storing various data, and a computer link unit 44 for enabling predetermined data communication with the programmable display device 28 as basic units. The change state is monitored, and if a data change such as a new data input is recognized, necessary arithmetic processing is performed, and then the corresponding address on the memory unit 42 is accessed to rewrite the content, or the data is sent to the output unit 40. It is configured to send data.

The storage location of the state data MD which is directly input / output to / from the target system 30 or used for control thereof is controlled by a level meter or limit switch provided on the target system 30 to be controlled or displayed. A passive component, an active component such as a relay or a motor, or a data setting component such as a counter or a printer is secured in the memory unit 42, and the input / output data is a word for word data such as a numerical value. The bit device is set in the memory unit 42 so that the storage location can be specified by designating a predetermined device name for bit data such as on / off information.

Therefore, by simply specifying and accessing an arbitrary word device or bit device in the memory unit 42 from inside or outside the PLC 32,
The corresponding position of the target system 30 is controlled or information on the operation state of the target system 30 can be individually extracted.

[0017]

[Structure of Programmed Display Device] As shown in FIG. 3, a programmed display device 28 embodying the present invention is configured so that a large opening provided at a central position on the front of a main body case 46 is closed.
While a display 48 selected from various display means such as RT, EL, plasma or liquid crystal is arranged, a socket 54 for detachably attaching a plug 52 of a keyboard 50 is arranged below the display 48.

The display control circuit 56 shown in FIG.
8 is a transparent touch panel 5 on the front of the display screen 20.
8 to cover in close contact. This touch panel 58
The input position of the instruction by pressing is input and analyzed via the touch panel controller 60, and data input by manual operation during operation of the entire system is enabled.

The basic structure of the display control circuit 56 is substantially the same as that of a general personal computer, and various memories 70 and 72 including a CPU 64, a ROM 66, a RAM 68, and a graphic controller 74 are connected via a bus line 62. Is connected, the CPU 64 performs a predetermined arithmetic operation in accordance with the system program stored in the ROM 66, and allows a character string to be input from the keyboard 50 via the I / O controller 76.
Various operation results appropriately stored in the work memory set in the AM 68 are developed on the video RAM 78 by the graphic controller 74 using image data stored in the graphic memory 70 in advance, and the video RAM 78 A display corresponding to the contents written into the inside is performed on the display screen 20 of the display 48.

Further, the computer link unit 44 of the PLC 32 and the parallel or serial communication path 12 are connected to each other via the communication controller 80 which operates with an algorithm specialized for the circuit configuration of the PLC 32 or a general-purpose communication program. Enables data transfer.

[0021]

[Structure of processing instruction word] In the programmable display device 28 embodying the present invention, as shown in FIG. 4 (a), a base screen consisting only of an image such as a nameplate whose display contents do not need to be changed. 82, or image data 84 such as a figure which blinks or changes color or shape on the base screen 82, is stored in the graphic memory 70 in advance by designating one file number for each required display unit. Keep it.

On the other hand, the memory unit 42 on the PLC 32 side
Of the state data MD indicated by the bit device corresponding to the on / off state of the relay set above or the word device corresponding to the change state of the temperature, the necessary data MD ′ is stored in the RAM of the programmable display device 28 at an appropriate time.
The data is read into the state data memory 86 set on the memory 68 in association with each other.

Here, the processing instruction words W illustrated in FIG. 5A are stored in advance in the event data memory 72 in a number corresponding to the number of events to be executed on each base screen 82. The processing instruction word W is referenced for each execution event, the file number F of the base screen 82 on which the display control operation is to be performed, the event name N specifying the operation content to be executed on the base screen 82. A reference information r including one or a plurality of data is provided as a set. In the reference information r, necessary information such as an address of data to be referred or display coordinates on the display screen 20 on the display 48 is provided. The information can be set in advance.

Therefore, the processing instruction word W described above is read out intermittently every minute time, and the operation of the content specified by the event name of each processing instruction word W is fetched from the PLC 32 into the state data memory 86. By executing while referring to the state data MD ′ and the reference information r in the processing instruction word W, display data that changes in response to a change in the content of the bit device or word device on the PLC 32 side is synthesized, and the control state of the PLC 32 Display operation corresponding to
This is performed on the designated base screen 82.

The present invention has the above-described configuration, and in conjunction with the turning on of a predetermined bit device in the state data MD ', an error message corresponding to the display content of the bit device is displayed on the display screen 20. Is provided with a processing instruction word that can be forcibly displayed.

That is, in the specific bit position A1 in the state data memory 86 illustrated in FIG.
A bit device for displaying an abnormal operation state of the C32 or the programmable display device 28 is set, and by detecting the state of the bit device,
The operation abnormality of the target system 30, the PLC 32, or the program-type display device 28 itself can be determined.

On the other hand, in the event data memory 72, a processing instruction word WE exclusively for displaying an error message is set. As shown in FIG. 5B, the processing instruction word WE displays the error content M specified by turning on the specific bit device A on the display screen 20 in conjunction with the specific bit device A being turned on. This is to be displayed at a specific location in the format set by the format information D.

Since the error message needs to be displayed with priority over other display contents regardless of what base screen 82 is open, the file of the base screen 82a to be displayed is displayed. For example, "F0", which designates the number F as an indefinite or error message display, is designated.

Further, as the contents of the reference information r, the reference message number M for specifying the position where the error message is stored, the address A of the bit device referred to for displaying the error message, and the display are blinked. And the format information P for selecting whether or not the format information P can be individually set.

The present invention is further characterized in that additional information can be displayed in a series in the error message. Specifically, for example, when an alarm is issued when the liquid level in the tank exceeds the upper limit, a message with a fixed content of "The tank liquid level has exceeded the upper limit" is displayed for the message. It is registered in the memory 87 as a reference message number M1.

Further, assuming that a device for displaying the actual detected value of the fluid meter is registered at the address "D100", following the fixed message described above,
"D100" is the address of the word device where the current fluid volume is stored, such as "The current fluid volume is {D100}."
The necessary messages are registered in a series in a preset format that can specify the message.

Then, when the corresponding bit device A1 on the PLC 32 side is turned on as shown in FIG. 4B, the displayed base screen 82a is forcibly changed to display an error message, and further referred to. Message number M1
Are developed along the format information P on the display screen 20. At this time, the value of “D100”, which is the address of the word device described in the message, is 23
As a result of reading 0, the fixed message and the variable information are combined in a series such as "The tank fluid volume has exceeded the upper limit. The current fluid volume is 230."
It is displayed at the set position on the base screen 82a.

Simultaneously or slightly later, when a specific bit device A2 set with the same type of processing instruction word WE2 is turned on, a display is made in the same manner as the line next to the above-mentioned display, and such a display is made. Is performed over a plurality of lines while sequentially changing the lines.

In the above-described embodiment, the address referred to in the fixed message is written directly in the fixed message. However, the position where the variable information is to be incorporated is designated by a specific symbol in advance. On the other hand, it is also possible to add a corresponding reference address in the reference information r of the processing instruction word.

A plurality of variable information can be provided in one fixed message, and the same reference bit position A
, A plurality of different reference message numbers M may be set. In this case, each message can be displayed, for example, while changing the line in ascending order of the reference message number, or in series on the same line.

Still further, instead of or in addition to displaying variable information in a predetermined format such as a decimal number simply by referring to a numerical value, bit information can be referred to while the corresponding bit is turned on or off. Corresponding to turning off, variable information such as a sentence such as “lamp ON” or a graphic simulating the state in which the lamp is turned on may be displayed.

Similarly, the display mode is not particularly limited, for example, the whole of the combined fixed message and variable information is represented not only by the above-described character strings but also by a graphic, or by a sound display corresponding to the character strings. Not something. Of course, not only the error message but also its contents can be freely set.

As described above, instead of displaying each message in chronological order by lowering the lines one by one in the order of occurrence of the error as described above, a predetermined location such as the bottom line of the display screen may be used. You can also scroll horizontally. Further, data relating to display position coordinates may be provided as the reference information r of the processing instruction word WE, and may be displayed at the set position. In addition, the display position or display format on the display screen can be appropriately changed and implemented.

Furthermore, instead of opening the base screen 82a for displaying the error message, the base screen 82a may be displayed by being superimposed on the base screen that is currently open, or may be displayed on the base screen corresponding to the previously set error contents. Forcibly switch,
You may make it display on the screen. Further, instead of displaying a message in response to turning on or off of bit data, a corresponding message is displayed when the data satisfies a predetermined condition such as exceeding a set value, for example. You may.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram of an electric circuit showing an example in which the present invention is used for controlling and displaying a PLC.

FIG. 3 is a partially broken perspective view showing a schematic configuration of an external shape.

4A and 4B are explanatory diagrams illustrating a display procedure using a processing instruction word for displaying an error message, wherein FIG. 4A illustrates a bit device in an off state, and FIG. 4B illustrates an on state.

FIG. 5 is an explanatory diagram showing a configuration of a processing instruction word,
(A) shows the basic configuration of a processing instruction word, and (b) shows the configuration of a processing instruction word for displaying an error message.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 External device 12 Communication path 14 Memory means 16 Data communication means 18 Event data storage means 20 Display screen 22 Data display means 24 First data 26 Second data 27 State data storage means 28 Program display 32 PLC 42 Memory unit 48 display 56 display control circuit 58 touch panel 68 RAM 70 graphic memory 72 event data memory 80 communication controller 82 base screen 84 image data 86 status data memory 87 message memory

Claims (5)

[Claims] An external device (10) communicates with a communication path (1).
2) a data communication means (16) which is connected via the communication path (12) and which can transfer data to and from the memory means (14) of the external device (10) through the communication path (12); Event data storage means (1) capable of storing a plurality of processing instruction words including information for specifying the content of the operation
8) and data display means for sequentially decoding the processing instruction words provided in the event data storage means (18) and enabling display on the display screen (20) corresponding to the information referred to by each processing instruction word. (22), wherein the processing instruction word enables a fixed message set in advance to be displayed on the display screen (20) in response to a change in the content of the first data (24). And a variable display corresponding to the current content of the one or more second data (26) is displayed in a series in the fixed message. 2. The first data (24) is bit data at a predetermined address position of an external device (10), and corresponds to a display position of variable data in a fixed message. 2. The programmable display device according to claim 1, wherein the fixed message and the variable data are displayed in series by entering an address specifying (26). 3. The programmable display device according to claim 2, wherein the second data is numerical data, and the numerical data is displayed in a fixed message in a predetermined format. . 4. The programmable display device according to claim 2, wherein said second data (26) is bit data, and a display corresponding to the bit content is made in the fixed message. 5. A plurality of sets of the first data (24) and the corresponding fixed data are provided, and the first data (24) is displayed on the display screen (20).
5. The programmable display device according to claim 1, wherein the display operation is performed in a time series in the order in which the contents change occurs.