JPH10105214A - Download system for programmable display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a programmable display device which has both display and control functions and is also designed to accelerate data processing by downloading them from an information processor to the programmable display device. SOLUTION: A download system of a programmable display device is constructed by connecting an information processor 20 to a programmable display device 1 through a high speed communication cable. An information recording medium 21 is inserted into the processor 20 and necessary functions are downloaded from the processor 20 to the device 1 based on the information. Therefore, the device 1 registers an image display control system, a display screen, a communication protocol, a user's program and a control function program. Then, the device 1 realizes basic functions of a conventional programmable controller through the user's and control function programs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a display function for displaying the operating state of a controlled object with each device constituting a plant of a chemical factory or a production line of a machine factory being controlled, and an operator's operation. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable display device having a control function of controlling an operation of a control target according to a command, and more particularly to a system for downloading necessary functions for the programmable display device.

[0002]

2. Description of the Related Art Conventionally, as a system for displaying an operation state of a control target and controlling the control target, as shown in FIG. 8, a programmable display device (11) mainly having a display function and a control function 2. Description of the Related Art There is known a system in which a programmable controller (12) provided with a computer is connected to each other by a communication cable (13). The programmable display device (11) includes a display (4) composed of a liquid crystal display or the like, a transparent touch input type operation panel (5) attached to a screen of the display (4), a microcomputer or the like. And a memory (15) for display control. On the other hand, the programmable control device (12) is generally called a sequencer or a programmable logic controller (PLC), and is configured by a microcomputer or the like and includes the programmable display device (11).
And control circuit (16) connected via communication cable (13)
, An input / output control memory (17), and an I / O unit (18) having input / output terminals.
The control target (19) is connected to the input / output terminal of (8). The control circuit (16) of the programmable control device (12) operates according to a user program created in advance using, for example, a ladder language, and exhibits a predetermined control function.

The data input by operating the operation panel (5) of the programmable display device (11) is supplied to the programmable control device (12) via the communication cable (13), and the programmable control device (12) is correspondingly supplied thereto. The control circuit (16) of (12) creates control data, and the control data is I / O
Output to the control target (19) via the unit (18). As a result, the operation of the control target (19) is controlled.
The state data obtained from the control target (19) is transmitted to the programmable display device (11) through the programmable control device (12).
Input to the control circuit (14), and the control circuit (14)
Creates display control data, and the display control data is
It is supplied to (4). Thus, the operation state of the control target (19) is displayed on the display (4).

[0004]

However, the conventional programmable display device (11) is a programmable control device.
Since the display function and the control function are exhibited in combination with (12), the programmable controller (12) is indispensable even when controlling a single or a small number of control objects, for example, and the entire apparatus is required. There was a problem that was massive.
Further, since communication is performed between the control circuit (14) of the programmable display device (11) and the control circuit (16) of the programmable control device (12) via the communication cable (13), time is required for data processing. There was such a problem.

It is an object of the present invention to easily realize a programmable display device having both a display function and a control function and achieving high-speed data processing by downloading from a data processing device.

[0006]

A download system for a programmable display device according to the present invention comprises a programmable display device having information input means and image display means.
And an information processing device (20) having a download function are connected to each other, and the information processing device (20) operates the information input means to the programmable display device (1) or status data from the control target. An image display control system for executing image display control on an image display means in response to an input of a program, a display screen created by a user, and a programmable control device (12) to be connected to the programmable display device (1)
A user program describing a communication protocol for performing communication with the device, a condition for controlling a control target to be connected to the programmable display device (1) via the I / O unit (2), and a user program Can be downloaded.

In the above-mentioned download system, by executing a download from the information processing device (20) to the programmable display device (1), the programmable display device (1) has an image display control system, a display screen,
The communication protocol, user program, and control function program are registered. Specifically, the image display control system includes a plurality of tasks including a data input task corresponding to the operation of the information input unit, a display task for the image display unit, and a communication task for controlling communication with an external programmable control device. The control function program is configured to be added to a task of the image display control system.
It is configured as one task, and the task is added by downloading.

[0008] In a programmable display device for controlling a single or a small number of controlled objects, an input / output control interface constituted by a downloaded control function program and a user program connects the controlled objects via an I / O unit. Connecting. In a programmable display device for controlling more control objects, a programmable control device is connected via a communication cable to a communication control interface configured according to a downloaded communication protocol, and the programmable control device is equipped with the programmable control device. The control target is connected to each of the plurality of I / O units.

In the programmable display device, when the image display control system is executed, a screen display corresponding to the operation of the information input means and / or the input of the status data from the control target is performed. Here, when a programmable control device is connected to the communication control interface via a communication cable, data communication is performed with the programmable control device according to a communication protocol, and the programmable control device is connected to the programmable control device. The control data is output to the controlled object or the status data from the controlled object is input.

The I / O control interface has an I
When the control target is connected via the / O unit, control data is output to the control target connected to the I / O unit or state data from the control target is input according to the user program. .

In the programmable display device (1), the basic functions of the conventional programmable control device (12) are realized by a user program and a control function program. Therefore, in order to control a single or a small number of controlled objects, the conventional programmable controller (12) is not required. As a result, the programmable display device (1) realized by downloading according to the present invention is It is smaller than a programmable display system comprising a combination of a display device (11) and a programmable control device (12).

In a specific configuration, for the user program and the control function program, the necessity of execution of download can be selected. Therefore, for example, in a programmable display device for controlling a large number of control targets, the download of the control function program and the user program can be omitted as necessary, thereby constructing a programmable display system according to the scale. You can do it.

In a specific configuration, a plurality of types of communication protocols having different specifications are prepared, and one type can be selected at the time of downloading. Therefore, the user can select an appropriate communication protocol according to the programmable control device to be connected to the communication control interface, which is convenient.

[0014]

According to the download system of the present invention, a programmable display device having both a display function and a control function and achieving high-speed data processing can be easily realized by downloading from an information processing device. I can do it.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in FIG.
A download system for a programmable display device according to the present invention is configured by connecting an information processing device (20) to a programmable display device (1) via a high-speed communication cable.
An information recording medium (21) in which functions described later are recorded as information is inserted into the information processing device (20), and necessary functions based on the information are transmitted from the information processing device (20) to the programmable display device (1). Downloaded to

In the programmable display device (1), as shown in FIG. 4, an I / O unit (2) can be connected to a connector (10) provided in the main body of the device. ) Is connected to the control target (19b). Further, similarly to the conventional programmable display device, it is also possible to connect a programmable control device (12) via a communication cable (13) and connect a control target (19a) to the programmable control device (12). .

The programmable display device (1) includes a display (4) constituted by a liquid crystal display, and the display (4).
Touch input type operation panel attached to the screen of (4) (5)
And a control circuit composed of a microcomputer
(3) and the ROM (7) and RA connected to the control circuit (3).
M (8), a communication control interface (6) comprising software executed by the control circuit (3) and an I / O control interface (9), and the communication control interface (6) has a communication cable (13). ) Is connected to the programmable controller (12), and the I / O control interface (9) is connected to the I / O unit (2) via the connectors (10) and (10).

First, the configuration of the downloaded programmable display device (1) will be described, and then the configuration of the download system will be described. In the downloaded programmable display device (1), the control circuit (3) has a multi-task processing function, and has a control management under an operating system (21) connected to the CPU (20) as shown in FIG. Task (22), Touch input task (23), Display task
(24) A plurality of tasks such as a PLC communication task (25) are registered, and the I / O control interface (9) is one of the tasks to be executed by the control circuit (3). Control tasks (26) such as / O control are additionally registered, and these tasks are activated according to a preset priority.

The control management task (22) analyzes a display control program, recognizes a data display request, and issues a processing request to the display task. Note that the display control program uses a “tag function” developed by the applicant, and responds to input data based on “tags” assigned to each figure or numerical image drawn on the screen. (For example, Japanese Patent Publication No. 3-6839).
5, JP-A-6-214535 and JP-A-6-1621
No. 55).

The PLC communication task (25) controls communication with the programmable controller (12) in response to a read / write request, and realizes data read / write. I
The / O control task (26) executes an input / output control procedure described later, and updates the result in its own memory. The display task (24) responds to the data display request by
This is to realize data display on the screen of the display (4). Here, the control management task (22) and the touch input task (2
3), the display task (24),... The PLC communication task (25) is a task inherent to the programmable display device itself (programmable display function), whereas the control task (26) is a programmable control device. It has the inherent input / output control function.

FIG. 7 shows an input / output control procedure to be executed by the control task (26). When the control task (26) is started, it is first determined in step S1 whether or not data has been input from the programmable display function. If YES, the data input in step S2 is referred to. In step S3, data exchange with the I / O unit (3) is performed. Next, step S
At 4, a control program created in advance in a ladder language or the like is executed to exhibit a predetermined input / output control function. Then, in step S5, it is determined whether or not data is output to the programmable display function. If YES, the data is output in step S6, and the procedure ends.

Next, the configuration of the download system according to the present invention will be described. Information processing device (20) shown in FIG.
As shown in FIG. 2, the information recording medium (21) to be inserted into the computer includes a drawing editor used by the user for drawing, a display control system that is a basic function of the programmable display device (1), and communication between the programmable control device. Are registered, a ladder editor used by the user for creating the control program (ladder program), and a control function program for executing the created ladder program. Here, the drawing editor, the display control system, and the communication protocol are the basic functions necessary for the conventional programmable display device, while the ladder editor and the control function program are used to configure the programmable display device of the present invention. This is an optional function that became necessary. A plurality of types of communication protocols having different specifications are registered by the makers of the programmable control device.

The information recording medium (21) is used as an information processing device (20)
, The download procedure shown in FIG. 3 can be executed. In the download procedure, first, in step S11, a drawing editor is activated, and then, in step S12, a drawing process of a user screen is performed. Next, after downloading the display control system in step S13, in step S14, a communication protocol is selected, and the selected communication protocol is downloaded. Then, in step S15, the user screen is downloaded.

Subsequently, in step S16, it is determined whether or not to use the control function based on the ladder program and the control function program.
After activating the ladder editor in step S17, a user program is created in step S18. Next, in step S19, the control function program is downloaded, and in step S20, the created user program is downloaded.

By executing the above download procedure,
The ROM (7) shown in FIG. 4 has, as shown in FIG. 5, a storage area for the display control system, a storage area for the communication protocol,
A storage area for the user screen, a storage area for the control function program, and a storage area for the user program are formed. As a result, a plurality of tasks shown in FIG. 6 are configured, and multitask processing can be realized. Where I
As described above, the control task (26) such as / O control can select whether or not to additionally register by the user's selection.

According to the programmable display device (1) in which a control task is additionally registered, the function of the control circuit (16) constituting the conventional programmable control device (12) is realized by the I / O control interface (9). At the same time, the function of the I / O unit (18) constituting the conventional programmable controller (12) is realized by the I / O unit (3) connected via the connector (10). The control device (12) is not required, thereby reducing the size of the entire device. Also, programmable display device
Since (1) and the I / O unit (3) are directly contact-connected without interposing a communication cable, data processing is performed at high speed.

Furthermore, the control task is one task in the multitask system, and is processed in response to a periodic task activation request, so that the response of the data update is almost real time.

The description of the above embodiments is for the purpose of describing the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof.
In addition, the configuration of each part of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a download system according to the present invention.

FIG. 2 is a diagram showing various information related to download stored in an information recording medium.

FIG. 3 is a flowchart showing a download procedure.

FIG. 4 is a block diagram illustrating a configuration of a programmable display system after downloading.

FIG. 5 is a diagram showing various data storage areas in a ROM.

FIG. 6 is a block diagram showing a plurality of tasks executed by a control circuit.

FIG. 7 is a flowchart showing a processing procedure of a control task.

FIG. 8 is a block diagram illustrating a configuration of a conventional programmable display system.

[Explanation of symbols]

 (1) Programmable display device (20) Information processing device (21) Information recording medium (13) Communication cable (2) I / O unit (3) Control circuit (4) Display (5) Operation panel (6) Communication control Interface (9) I / O control interface

Claims (4)

[Claims] 1. A programmable display device (1) having information input means and an image display means and an information processing device (20) having a download function are connected to each other. An image display control system for executing an image display control on the image display means in response to an operation of the information input means or an input of state data from a control target, and a display screen created by a user, for the programmable display device (1); A communication protocol for communicating with a programmable control device (12) to be connected to the programmable display device (1);
A programmable display device capable of downloading a user program describing conditions for controlling a control target to be connected via the O unit (2) and a control function program for executing the user program. Download system. 2. The download system according to claim 1, wherein for the user program and the control function program, whether or not to execute the download can be selected. 3. An image display control system includes a plurality of tasks including a data input task corresponding to an operation of an information input unit, a display task for an image display unit, and a communication task for controlling communication with an external programmable control device. The control function program is configured as one task to be added to the task of the image display control system,
3. The download system according to claim 1, wherein a task is added by downloading. 4. The download system according to claim 1, wherein a plurality of types of communication protocols having different specifications are prepared, and one type can be selected at the time of downloading.