JP3442963B2 - Programmable display - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production line of a chemical factory, a machine factory, a courier box in a building, etc. The present invention relates to a programmable display device having a display function for displaying an operation state of a control target as a control target and a control function for controlling the operation of the control target according to an operator's instruction.

[0002]

2. Description of the Related Art Conventionally, as a system for displaying an operating state of a controlled object and controlling the controlled object, as shown in FIG. 12, a programmable display device (5) mainly having a display function and a control function mainly are provided. There is known a system in which a programmable controller (6) having the above is connected to each other by a communication cable (50). The programmable display device (5) is composed of a display unit (51) composed of a liquid crystal display or the like, a data input touch panel (52) attached to the screen of the display unit (51), a microcomputer or the like. It has a control circuit (53) and a memory (54) for display control. Meanwhile, programmable controller
(6) is generally called a sequencer or programmable logic controller (PLC), and is composed of a microcomputer or the like and a control circuit (61) connected to the programmable display device (5) through a communication cable (50). ,
I / O with memory (62) for input / output control and input / output terminals
The I / O unit (63) is connected to the control target (23). The control circuit (61) of the programmable controller (6) operates according to a control program created in advance using, for example, a ladder language, and exhibits a predetermined control function.

The data input by operating the touch panel (52) of the programmable display device (5) is supplied to the programmable control device (6) via the communication cable (50), and the programmable control device (6) is supplied accordingly. ) Control circuit (61) creates control data, and the control data is I / O
It is output to the control target (23) via the unit (63). As a result, the operation of the controlled object (23) is controlled.
Further, the status data obtained from the controlled object (23) passes through the programmable controller (6) and the programmable display device (5).
Input to the control circuit (53) of the control circuit (53)
Creates display control data, and the display control data is a display device.
Supplied to (51). As a result, the operating state of the controlled object (23) is displayed on the display (51).

By the way, the control program to be set in the programmable control device (6) is created by connecting the programming device (7) such as a programming console or a ladder editor tool as shown by a chain line in FIG. This was done by keying in the device (7). That is, when a ladder diagram representing a sequence control for realizing a desired control operation is drawn by a key input operation of the programming device (7) and then a drawing end operation is performed, the ladder diagram is converted into a machine language control program. After being converted, it is downloaded to the programmable control device (6) and registered in the ROM in the device. Also, when it is necessary to modify a part of the control program as a result of actually operating the system, the programming device (7) is connected in the same manner as described above.
Editing is performed by the key input operation of (7).

[0005]

However, in the conventional editing work of the control program, the programming device (7) is programmed in the programmable control device (6) at the operating sites of the programmable display device (5) and the programmable control device (6). ) Has to be connected, the work is complicated, and the maintainability of the control program is poor. An object of the present invention is to provide a programmable display device capable of improving the maintainability of control programs.

[0006]

A programmable display device according to the present invention represents a reading means for reading a control program set in a specific programmable logic controller and the read control program by a combination of a plurality of logical symbols. The conversion means for converting the sequence control chart into a sequence control chart, the display control means for displaying the converted sequence control chart on the display means, and the sequence control chart displayed on the display means for editing according to the operation of the input means. An editing means for performing the conversion, an inverse conversion means for inversely converting the edited sequence control chart into a control program, and a writing back means for writing back the inversely converted control program to the specific programmable logic controller.

Here, the programmable logic controller is connected to an external input / output terminal via a communication cable as an external device, or an input / output control means for controlling input / output of data to / from a control target. In addition to being provided inside, the input / output control means is connected to a data input / output means for inputting / outputting data to / from a controlled object.

In the programmable display device of the present invention, when the control program of the programmable control device is edited, the operation mode of the programmable display device is switched from the control mode to the edit mode by operating the input means, for example. . In the control mode, the programmable display device of the present invention, like the conventional programmable display device, is connected to one or a plurality of control targets via one or a plurality of programmable logic controllers and has a predetermined control program. In accordance with the operation of the input means, the operation state of each controlled object is displayed on the display means as an image and the operation of each controlled object is controlled.

On the other hand, in the edit mode, the control program set in a specific programmable logic controller is first read with one or a plurality of programmable logic controllers connected, and the control program is For example, it is converted into a sequence control chart such as a ladder diagram. This conversion process can be automatically performed according to a predetermined conversion procedure. The converted sequence control chart is displayed as an image on the display means. Therefore, the operator operates the input means to edit the displayed sequence control chart on the screen. The edited sequence control chart is converted back into a control program. This inverse conversion process can be automatically performed according to a predetermined inverse conversion procedure. The inversely converted control program is written back to the specific programmable logic controller.

In a concrete configuration, the reading means includes a selecting means for selecting one of a plurality of connected programmable logic controllers to be edited, and the converting means includes the plurality of the plurality of programmable logic controllers. A conversion procedure for converting the control program into a sequence control chart is registered for each of the programmable logic controllers of the units, and the conversion procedure is executed for the selected programmable logic controller.

In this specific configuration, a plurality of programmable logic controllers are connected to the main body of the apparatus, and a control target is connected to each programmable logic controller. In the control mode, the operating states of the plurality of control targets are changed. is displayed on the display means, a plurality of the controlled object is controlled simultaneously in response to <br/> operation of the input means. In the edit mode, for one selected programmable logic controller, a control program is read, conversion processing according to the programmable logic controller is performed, and desired conversion is performed, and then inverse conversion according to the programmable logic controller is performed. The process is executed.

In another specific configuration, the reading means includes a designating means for designating a programmable logic controller which is actually connected among a plurality of programmable logic controllers which may be connected. In the conversion means, a conversion procedure for converting a control program into a sequence control chart is registered for each of the plurality of programmable logic controllers, and the conversion procedure is executed for the designated programmable logic controller.

In the concrete structure, one unit is provided on the apparatus main body.
With pedestal programmable logic controller is connected, is connected to the programmable logic controller to the controlled object, the control mode,該制together with the operation state of the control object is displayed on the display means, in accordance with an operation of the input means the The controlled object is controlled. In the edit mode, for the actually connected programmable logic controller, after the control program is read, the conversion processing according to the programmable logic controller is performed, and the desired editing is performed, the inverse conversion according to the programmable logic controller is performed. The process is executed.

In a more specific configuration, the editing means is
A plurality of key images for inputting edit contents are displayed on the display means, and an edit procedure is executed according to the operation of the input means corresponding to the key images. According to the specific configuration, by operating the key image displayed on the screen of the display means, it is possible to perform the editing by the key operation similar to the editing operation using the conventional programming device, and the operability is improved. It is good.

[0015]

According to the programmable display device of the present invention, in the editing operation of the control program, the programmable display device and the control of the programmable control device are operated based on the display and operation of the programmable display device at the operating site of the programmable control device. Since the program can be edited, it is not necessary to connect a programming device as in the conventional case, the work can be simplified, and the maintainability of the control program can be improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. The programmable display device according to the present invention is, as shown in FIG.
The display (18) includes various displays (18) such as RT, EL, plasma or liquid crystal, and a touch panel (15) for data input is attached to the screen of the display (18). or,
An I / O unit (21) described later is integrally attached to the back side of the main body of the programmable display device (1).

As shown in FIG. 1, the programmable display device (1) can be connected to a controlled object (23) via an I / O unit (21). Also, programmable display device (1)
It is also possible to connect a plurality of programmable control devices (22) in series and connect the control target (23) to each programmable control device (22), as in the conventional programmable display device.

The programmable display device (1) includes a CPU (11), a ROM (12), a RAM (13), a touch panel controller (14), a graphic controller (16) and a communication controller (19) via a bus line. The touch panel controller (14) is connected to the touch panel (15), and the graphic controller (16) is connected to the video RAM (17) and the display (18). The ROM (12) contains a main program for image display and device control similar to that of a conventional programmable display device, a conversion program and an inverse conversion program described later, and graphic data of a base screen to be displayed on the display (18). It is stored. CP
The U (11) executes arithmetic processing according to the main program in the ROM (12). The calculation result is once stored in the RAM (13), then expanded on the video RAM (17) by the graphic controller (16), and an image is displayed on the display (18) according to the data in the video RAM (17). Is displayed.

Further, the CPU (11) is connected to an I / O control interface (20) which exhibits the I / O control function of a conventional programmable controller (PLC). In the I / O control interface (20), an I / O unit (21) that has a data input / output function that a conventional programmable controller (PLC) has is provided with a connector.
(Not shown). By this, I / O
The state of the controlled object (23) connected to the unit (21) is RAM
After being taken into a predetermined input data storage area in (13), output data obtained by subjecting the input data to predetermined arithmetic processing is stored in a predetermined output data storage area in the RAM (13). . Therefore, programmable display device (1)
With respect to the controlled object (23) connected to the I / O unit (21), the operation state can be grasped or the operation can be controlled by accessing the RAM (13).

The main program stored in the ROM (12) uses the "tag function" developed by the applicant, and is assigned to each figure or numerical image drawn on the screen. The image display changing operation according to the input data is executed based on the "tag" (for example, Japanese Patent Publication No. 3-6).
8395, JP-A-5-303477, JP-A-6-2
14535, JP-A-6-162155, etc.).

That is, in the programmable display device (1), a plurality of base screens (40) whose display contents do not need to be changed as shown in FIG. 11 (a) and switches and lamps as shown in FIG. 11 (b). as graphic data and a plurality of image blocks (41) (42) that need to display change etc. registered in advance in the memo Li with each file number. In the programmable display device (1), the ROM (1) has a number of processing instruction words W corresponding to the number of events to be executed on each base screen (40).
2) Stored in. The basic structure of the processing instruction word W is, as shown in FIG. 9, a base screen (4
The file number F of (0), the event name T for specifying the operation content to be executed on the base screen, and the reference information I consisting of one or a plurality of data referred to for each execution event are provided as a set. It is a thing.

On the other hand, in the memory in the programmable controller (22), a word device is used for the word data whose input and output data is a numerical value, and a bit device is used for the bit data whose on / off state is. The storage location can be specified by specifying the address. This makes it possible to control the corresponding device to be controlled or to individually retrieve the information regarding the operating state thereof by simply accessing an arbitrary word device or bit device in the programmable control device (22).

Of the status information indicated by the bit device or word device formed in the memory in the programmable controller (22), necessary information is read into the memory on the programmable display device (1) side in a timely manner, while the programmable display device is read. The process instruction word W stored in the ROM (12) in (1) is repeatedly read out, and the operation of the content specified by the event name T of each process instruction word W is performed to obtain the status information on the programmable controller (22) side. The display operation that changes according to the content change of the bit device or the word device on the side of the programmable control device (22) is performed by executing the display operation with reference to.

For example, in the example shown in FIG. 11, the base screen (40) of FIG.
The image block (41) of the switch and the image block (42) of the lamp, which are stored as the file number F in the same figure (b), are combined and displayed as shown in the same figure (c), and are displayed above. The display color of each image block on the composite screen (43) is changed according to the value of the bit device on the programmable control device (12) side.

Specifically, the processing instruction word for the display change operation is the file number of the base screen, the event name that specifies the calling of the image block, the file number that specifies the calling image block, and is referred to when the image block is displayed. The address of the bit device on the programmable controller (22) side, information for specifying the display color when the bit device is "1" or "0", coordinate data on the screen for displaying the image block, and the like.

On the other hand, the processing instruction word for controlling the controlled object outputs the control data to the programmable control device (22) side in conjunction with the pressing operation on the touch panel (15), and the programmable control device ( It is possible to control the control target (23) connected to (22), the file number of the base screen, the event name that identifies the operation of the touch panel (15), and the input operation from the touch panel (15) is enabled. The input coordinate range on the display (18), the address of the device on the side of the programmable control device (22) to which the data should be written in conjunction with the operation of the touch panel (15), and the like.

FIG. 10 shows the operation of the programmable display device (1) when controlling the controlled object by operating the touch panel. First, in step S20, an online state in which data communication is performed with the I / O unit side to control the controlled object, or an offline state in which only the programmable display device is operated to perform various setting processing, diagnostic processing, etc. The state is selected, and if it is offline, various predetermined processes are executed in step S21.

If online, the process proceeds to step S22 to determine whether or not the touch panel has been operated. If NO, the data communication process is executed at step S24. That is, the state information of the programmable control device side quoted in the processing instruction word set in the memory of the programmable display device is taken out to the programmable display device side, and the state information of the processing instruction word stored in the memory , The address of the word device and the bit device of the programmable controller is extracted from the information contained in the processing instruction word related to the currently displayed base screen, and the memory of the programmable controller is directly accessed to be addressed. the status information data is to expand the memory <br/> within.

If YES is determined in step S22, the process proceeds to step S23, a predetermined arithmetic process is executed based on the data input by the touch panel, and then the data communication process of step S24 is executed. Then, in step S25, the display process of each event is executed, and the display operation based on the state information extracted by the communication process among the process instruction words stored in the memory is performed. A programmable display device (1) for controlling a control target (23) connected to the I / O unit (21) shown in FIG.
The operation of is basically the same, and I / O unit (21)
And the I / O control interface (20) performs the same operation as the programmable controller (22) described above.

In the programmable display device (1) of the present invention, in addition to the control operation mode based on the above-mentioned "tag function", the ladder to be executed by the programmable control device (22) or the I / O control interface (20). It is possible to set the edit mode for editing the control program in the language.

Here, the programmable display device of the present invention
As shown in FIG. 4, in the ROM (12) of (1), a control program in machine language executable by the programmable controller (22) is provided for each of a plurality of models of the programmable controller (22) by a plurality of logical symbols. A conversion program for converting into a known ladder diagram and a reverse conversion program for performing the reverse process are stored in a table. or,
As one of the models of the programmable controller (22),
Regarding the programmable control function realized by the I / O unit (21) and the I / O control interface (20) shown in FIG. 4, the conversion program and the inverse conversion program are stored in the table of FIG. It should be noted that the supported models can be changed or expanded by adding / deleting the table shown in FIG.

2 and 3 show the operation of the programmable display device (1) according to the present invention. First, in step S1 of FIG. 2, the programmable control device (22) is connected to the programmable display device (1) to be controlled.
A normal online process for controlling (23) is executed, or a predetermined offline process by the programmable display device (1) is executed with the programmable control device (22) disconnected.

Thereafter, in step S2, it is determined whether or not the program mode has been turned on to newly create or edit the control program. Here, the ON operation of the program mode can be realized by displaying a program mode switch (not shown) on the screen and pressing the switch. Next, in step S3, the PLC selection screen (25) and the programming device image (26) as shown in FIG. 5 are displayed, and the control program is selected from among the plurality of programmable control devices in the selection screen (25). The station number of one programmable controller to be newly created or edited is selected by key operation on the programming device image (26).

Subsequently, in step S4 of FIG. 2, a key operation is used to select whether to newly create or edit the control program of the selected programmable controller. In case of new creation, new creation key image as shown in Fig. 5.
With (27) displayed, the programming device image
(26) is operated to draw a ladder diagram showing a desired control operation. Then, when the end key image (29) shown in FIG. 5 is operated, the created ladder diagram is inversely converted, and the control program obtained by this is written in the programmable controller.

On the other hand, when the edit is selected, the process shown in FIG.
While the newly created key image (27) shown in is displayed, the key image (27) is pressed. This switches to the ladder diagram monitor screen (30) shown in FIG.
In step S5, the control program is read from the selected programmable controller, and step S6
Then, the read control program is converted into a ladder diagram representing the control program by executing the above-mentioned conversion program according to the selected programmable controller, and a ladder diagram monitor screen (30) as shown in FIG. 6 is displayed. Is drawn.

At this stage, the mode discrimination in step S7 of FIG. 2 is performed, and the device switching key image (3
If a 3) pressed, the device mode is determined, switch to the device monitor screen (35) in FIG. 7, if pressing the ladder switching key image of the image (38), the ladder mode <br/> over Is determined and the screen returns to the ladder diagram monitor screen (30) in FIG. That is, when the device mode is determined in step S7 in FIG. 2, the device monitor operation of step S8 is performed, and when the ladder mode is determined in step S7, the ladder monitor operation of step S9 is performed.

In the device monitor operation, it is determined in step S10 of FIG. 3 whether or not the edit mode is set. If the result is YES, the process proceeds to step S11,
In the device monitor screen (35) shown in FIG. 7, the device information including the device name and its data can be edited by operating the programming device image (26). After that, in step S12, it is determined whether or not to write the device information. If the write key image (32) in FIG. 7 is pressed here, the determination is yes, and the process proceeds to step S13 in FIG. After the edited device information is written in the ladder diagram, the ladder diagram is displayed in step S1.
In step 4, the control program is inversely converted.

On the other hand, in the ladder monitor operation, FIG.
In step S15, it is determined whether the edit mode is set, and if the result is YES, the process proceeds to step S16, and the operation of the programming device image (26) is performed on the ladder diagram monitor screen (30) shown in FIG. Editing can be added to the ladder diagram by. Then, in step S17, it is determined whether or not to write the edited ladder diagram.
Here, if the write key image (32) in FIG. 6 is pressed, it is determined to be yes, the process proceeds to step S18 in FIG. 3, and after the edited ladder diagram is written, the ladder diagram is In step S14, the corresponding control program is inversely converted. Thereafter, in step S19, it is determined whether or not the program mode is to be terminated, and if the end key image (34) shown in FIG. 6 or 7 is pressed at this point, the process returns to step S1 in FIG. Online / offline processing is executed.

According to the programmable display device described above,
Since the control program of the programmable controller (22) can be edited by using the touch panel (15) and the display (18) which are components of the programmable display device (1), the conventional programming device can be connected. It is unnecessary, and the maintenance of the control program can be easily performed with a simple configuration. In particular, the control program for the internal PLC function including the I / O unit (21) and the I / O control interface (20) is created and edited at high speed by communication through the bus inside the programmable display device (1). You can

The configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims. For example, the ladder diagram monitor screen (30)
By displaying a plurality of windows in the display of the device monitor screen (35), it is possible to simultaneously create and edit a control program for a plurality of programmable control devices.

Further, by obligating the operator to input a password when reading the program shown in FIG. 2,
It is also possible to give the program read right only to a specific operator. Further, in the device editing and the ladder editing shown in FIG. 3, it is possible to apply a stricter restriction than the password input. Furthermore, when the editing work is performed, if the configuration in which the login information such as the name of the editor and the editing time is stored in the memory in the programmable display device (1) is adopted, the responsibility for the editing can be clarified. You can do it.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a programmable display device according to the present invention.

FIG. 2 is a flowchart showing the first half operation of the programmable display device in a program mode.

FIG. 3 is a flowchart showing an operation of the latter half of the above.

FIG. 4 is a diagram showing a table of conversion programs and inverse conversion programs stored in a ROM.

FIG. 5 is a diagram showing a PLC selection screen.

FIG. 6 is a diagram showing a ladder diagram monitor screen.

FIG. 7 is a diagram showing a device monitor screen.

FIG. 8 is a partially cutaway perspective view showing the external appearance of the programmable display device.

FIG. 9 is a diagram showing a data format of a processing instruction word.

FIG. 10 is a flowchart showing a control procedure based on the operation of the operation panel.

FIG. 11 is a diagram showing a base screen (a), an image block (b), and a composite screen (c).

FIG. 12 is a block diagram showing a configuration of a conventional programmable display device and programmable control device.

[Explanation of symbols]

(1) Programmable display device (20) I / O control interface (21) I / O unit (22) Programmable controller (23) Control target (25) PLC selection screen (26) Image of programming device (30) Ladder diagram monitor screen (35) Device monitor screen

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G05B 23/02 G05B 19/05

Claims (4)

(57) [Claims] 1. Operates according to a predetermined control program
One or more programmable logic controllers
Is connected to one or more control targets via
The operation status of the elephant is displayed as an image on the display and the input
The operation of each controlled object can be controlled by operating the steps
In the programmable display device,One or more programmable logic units connected
Select one of the controller to edit
Selection means for chosen Set to programmable logic controller
Reading means for reading the control program that isFor multiple models of programmable logic controllers
The control program for each model by combining multiple logical symbols.
To convert to the sequence control chart represented by
Conversion procedure and sequence control chart
The reverse conversion procedure and the reverse conversion procedure are registered.
Registration means, Of the selected programmable logic controller
By executing the conversion procedure according to the model,
Sequence control chart for the loaded control program
Conversion means for converting to The converted sequence control chart is displayed on the display means as an image table.
Display control means shown, Depending on the operation of the input means, the system displayed on the display means
-Editing means for editing the sequence control chart,Of the selected programmable logic controller
By executing the inverse conversion procedure according to the model, Hen
Convert sequence control chart after collection into control program
Inverse conversion means for converting The inversely converted control program ischosenProgram
Write-back means to write-back to the Mable logic controller
A programmable display device. 2. The editing means displays a plurality of key images for inputting editing contents on the display means, and executes the editing procedure in response to the operation of the input means corresponding to the key images. A programmable display device according to. 3. The programmable display device according to claim 1, wherein the programmable logic controller is connected to an external input / output terminal as an external device via a communication cable. 4. The programmable logic controller is provided with an input / output control means for controlling input / output of data to / from a control target, and inputs / outputs data to / from the control target from the input / output control means. The programmable display device according to claim 1 or 2, which is configured by connecting a data input / output means for outputting.