JP2002007363A - Communication system for control and recording medium with its program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system for control capable of disclosing the data of a local control system to terminal equipment connected through the Internet without damaging the security of the local control system. SOLUTION: The local control system 2 transmits screen data specifying operation in the case of acquiring and displaying the contents of a device on a programmable display 14 to a disclosed server device 4. The screen data are converted into an applet executable for a client device 5 by a compiler 42 of the disclosed server device 5 and distributed from the disclosed server device 4 through the Internet 3 to the client device 5 later. When the relevant applet is executed, the client device 5 inquires the state of the device to the disclosed server device 4 in place of inquiring the state from the programmable display 14 to the device inside the local control system 2 and displays the state on the screen of the client device 5 corresponding to a response.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control communication system capable of releasing data of a local control system to a terminal device connected via the Internet without impairing the security of the local control system. .

[0002]

2. Description of the Related Art Conventionally, programmable logic
The controller (hereinafter abbreviated as PLC) is, for example,
It is widely used as a control device for controlling various target systems such as a belt conveyor type automatic assembling machine. Further, in recent years, with the complexity of the target system, a plurality of PLCs have been used in cooperation with each other. The display of data from each PLC or the control instruction to the PLC is performed not only by a display device arranged in the vicinity of the PLC or the like, but also, for example, by installing the display device at a location away from these display devices. In some cases, a control system is constructed so that the control host computer can display or operate the computer.

More specifically, for example, as shown in FIG. 12, in a conventional control system 501, a PLC 503 is positioned as a control center, and each PLC 503 includes a device 521 of a target system 502, a display and A programmable display 505 for giving a control instruction is connected. Further, another PLC 503 and a control host computer 507 are connected to the PLC 503 via a serial cable 504.
Between the host 503 and the control host computer 507 and each P
The transfer of control data between the LCs 503 is performed by the PLC
503 is performed using the communication function.

In this configuration, the display processing unit 571 of the control host computer 507 communicates with the PLC 503 to receive data indicating the status of the target system 502, displays the data on the screen according to the status, and allows the user to input data. In response, control data is sent to the PLC 503, and the target system 502 is controlled according to the control data. Similarly, the programmable display 505 is connected to the PLC 5
03, while displaying / controlling the state of the target system 502.

However, the control system 501
Is basically a closed system, in which the state of the control system such as the screen of a programmable display cannot be viewed from a remote place.

In order to solve the above-mentioned problem, the applicant of the present application disclosed in Japanese Patent Application No. 2000-077002 filed earlier that data showing a screen of a programmable display can be displayed on a terminal device via the Internet. A configuration in which the data is converted into a format and distributed to a terminal device via the Internet has been disclosed.

[0007] As shown in FIG.
01, the local control system 102 includes a programmable display 114 and a control host computer 116.
Are connected via a network 115 that communicates according to a predetermined common protocol.
When the PLC 112 communicates with the control host computer 116 or another programmable display 114, the relay 14 relays communication using a dedicated protocol specific to the model of the PLC 112 and communication using a common protocol. This allows each programmable display 114 and control host computer 116 to communicate with another programmable display 114 using a common protocol regardless of the type of the PLC 112 connected to the other programmable display 114.

Further, the control host computer 1
16 is provided with a public server unit 161 that can be connected to the Internet 103.
When accessed from, the applet generated by compiling the screen data is transmitted to the client device 105 by the public server unit 161. Further, the client device 105 executing the applet communicates with the control host computer 116 to receive and display the data of the devices of the local control system 102.

Here, the screen data defines an operation when the programmable display 114 displays a screen. The client device 105 accesses the devices in the local control system 102 instead of accessing the public server. The device data is received from the unit 161. This allows the client device 105 to display a screen having the same content as the display screen of the programmable display 114, despite being connected via the Internet 103.

[0010]

However, in the control system 101 having the above configuration, the local control system 1
Since 02 discloses the data of the applet and the device, the burden on the user of the local control system 102 increases, and it may be difficult to maintain security.

[0011] Specifically, the public server unit 161 includes:
Internet 10 to publish applets etc.
3 must be constantly connected and access from many client devices 105 must be accepted. Therefore, it is likely to be a target of unauthorized access. Here, in the control system, since erroneous control on the control target is directly linked to an accident, the control host computer 11 including the public server unit 161
6 is hijacked and unauthorized access to equipment in the local control system 102 causes serious damage.
However, it is generally very difficult to construct a secure public server device that can be accessed from many client devices 105.

[0012] Further, for a constant connection to the Internet 103, a setting different from the LAN setting in the local control system 102 is required. Also, the client device 1
Data traffic (traffic) with the Internet 103 varies depending on the number of accesses from the Internet 05.
Difficult to predict traffic. Accordingly, there is a possibility that the communication capacity may be secured more than necessary or the necessary communication capacity may not be secured, which may hinder disclosure.

Accordingly, the local control system 102
The user (operator) needs to train a technician who can not only maintain and maintain the local control system 102 but also maintain and manage the control host computer 116 so that the connection with the Internet 103 is not hindered. .

The present invention has been made in view of the above problems, and has as its object to provide a local control system with a terminal device connected via the Internet without impairing the security of the local control system. An object of the present invention is to realize a control communication system capable of releasing data.

[0015]

According to a first aspect of the present invention, there is provided a control communication system which can be connected to a terminal device via the Internet and has a public server having storage means, for example, the Internet or a public telephone line network. A control communication system provided with a local control system including a control display device that can communicate with the public server device via a wide area communication network such as
It is characterized by the following measures.

That is, the control display device converts screen data indicating an operation of acquiring data of a device necessary for display and an operation of displaying a screen based on the acquired data, and the terminal device executes the operation. A program that allows the terminal device to execute an operation of inquiring of the public server device for device data indicated by screen data and an operation of displaying the data on the screen of the terminal device in response to the inquiry And writing means for storing the converted program in the storage means of the public server device. In addition, the publishing server device includes a publishing unit that transmits the program in response to a request from the terminal device and that responds to an inquiry from a terminal device that executes the program in place of the device. ing. In addition,
The device may be a control target itself or a control device connected to the control target, or may be a programmable display device such as a memory in which data manually input from an input device such as a barcode reader is stored. May be used.

In the above configuration, for example, the conversion means provided in the control communication system such as in the local control system or in the public server device converts the screen data,
A program that performs the same operation as the screen data is generated, and the writing unit stores the program in the storage unit of the public server device.

When there is a request from the terminal device, the publishing means of the publishing server reads the program from the storage means and transmits the program to the terminal. When the program is executed by the terminal device, the terminal device makes an inquiry to the public server device, for example, instead of the control display device such as a programmable display device inquiring the device, and transmits the program from the public means of the public server device. It is displayed on the screen of the terminal device according to the response. If the response by the disclosure means is the same as the response of the device of the local control system, the screen of the terminal device becomes the same as the screen of the control display device, and can be monitored from a remote place. When the two are different, the screen of the terminal device is the same as the screen of the control display device except for the device data, so that the screen of the control display device can be simulated from a remote place.

As a result, as long as the terminal device can be connected to the Internet, it is possible to monitor and simulate the control display device in the same manner as the control display device of the local control system even from a remote place. .

Further, since the program for performing the above operation is distributed from the public server device, it is not necessary to install the display program in the terminal device in advance, and the labor and cost for installation can be reduced.

In addition, since the conversion means creates the program from the screen data, there is no need to create a screen for the terminal device, and the labor for creating the screen can be greatly reduced. Unless screen data for a remote location is created, the screen for a remote location and the screen of the control display device are always kept the same. As compared to the case where the management is performed so as to be the same, the labor of management can be greatly reduced.

The above-mentioned program may be a program including a machine language executable by the terminal device, but is an applet having a predetermined procedure so that the program does not depend on the model. For example, it is preferable to provide a translator for translating an applet into a machine language for its own device, such as a virtual machine.

In this case, the conversion means generates an applet independent of the model of the terminal device, and the translation means of the terminal device translates and executes the applet. Inquiry and display on the side communication means. As a result, even if only one type of applet is converted, a plurality of types of terminal devices can display a screen having the same content as the display screen of the control display device.

Further, in the above configuration, the program is distributed from a public server device different from the local control system. Therefore, even if an unauthorized access is attempted via the Internet, the unauthorized access is concentrated not on the local control system but on the public server device. Also, when distributing a program corresponding to screen data, the communication partner of the local control system can be limited to the public server device, so that the local control system can communicate with the local control system in comparison with direct distribution to many terminal devices. It is easy to improve the confidentiality with the server device. As a result, unauthorized access to the local control system can be prevented, although the program can be distributed to a terminal device connected to the Internet.

Therefore, even if the operation of the public server device is hindered due to unauthorized access, the local control system can control the control object without any hindrance, but only hinders the distribution to the terminal device. . As a result,
A more secure control communication system can be realized.

In addition, when publishing data on the Internet, not only the above countermeasures against unauthorized access, but also
When each user installs a public server device, a different skill is required from the management and maintenance of the local control system, such as setting for constant connection to the Internet and selection of communication capacity with the Internet. It is necessary to train engineers who are proficient in these skills.

On the other hand, in the above configuration, since each local control system only needs to communicate with a specific public server device via a wide area communication network, setting and selection of communication capacity are easy. As a result, each user does not need to train technicians who are skilled in the Internet, and can concentrate on only maintenance and management of the local control system, so that the burden on each user can be reduced.

On the other hand, in the case of the public server device, an engineer proficient in the Internet is required. However, the number of users is smaller than when each user is trained separately.
The number of engineers in the entire control communication system can be reduced. Furthermore, since the public server device publishes the program of each user, it is possible to reduce the time and effort for management and maintenance such as disk capacity and communication capacity as compared with the case where each user publishes the program separately.

In particular, since the amount of data communication with the Internet changes according to the number of accesses, when the public server device is accessed from an unspecified number of terminal devices, it is extremely difficult to predict the required communication capacity. difficult. However, in the above configuration, since the public server device publishes the program of each user, even if the communication capacity is set with a margin of the same ratio as when each is installed separately, the communication capacity is higher than in the separate case. The extra capacity (data communication amount) increases. Therefore, even if the data traffic related to a certain user suddenly increases due to an increase in the number of accesses to a program by a certain user, the data traffic increases if the data traffic related to another user does not increase. Can be absorbed. As a result, it becomes easier to set the communication capacity as compared with the case where the public server devices are separately provided.

According to a second aspect of the present invention, in the control communication system according to the first aspect of the present invention, the publishing means transmits the information from the terminal device based on a communication result with the local control system. It is characterized by responding to inquiries.

According to this configuration, the publishing means of the publishing server device communicates with the local control system and responds to the inquiry from the terminal device, so that the terminal device can display the status of the device of the local control system. As a result, the local control system can be safely monitored from a remote terminal device.

Further, in the control communication system according to a third aspect of the present invention, in the configuration of the second aspect, the screen data is data indicating an operation of the control display device instructing the device in response to an operation. When receiving the screen data indicating the instruction operation, the conversion unit converts an operation of transmitting an instruction to the device in accordance with an operation to the terminal device into a program for causing the terminal device to execute the operation. In addition, the publishing unit transmits an instruction to the device to the local control system in response to an instruction from the terminal device.

In the above configuration, the terminal device that executes the program transmits an instruction according to an operation to the public server device instead of the control display device instructing the device. Furthermore, the publishing means of the publishing server device, at the time of receiving an instruction or at the time of synchronization with the local control system,
Send instructions to the local control system. Thus, the instruction from the terminal device is reflected on the local control system. As a result, the local control system can be safely controlled from a remote terminal device.

According to a fourth aspect of the present invention, in the control communication system according to the first aspect of the present invention, the publishing means includes a simulating means for simulating input / output of a device provided in the local control system. It is characterized by having.

In this configuration, the simulating means of the public server simulates input / output of the device of the local control system. As a result, the remote control terminal device can safely simulate the control display device of the local control system, and can be particularly suitably used, for example, for training an operator of the control display device of the local control system.

According to a fifth aspect of the present invention, in the control communication system according to the fourth aspect of the present invention, the screen data is data indicating an operation of the control display device instructing the device in response to an operation. When receiving the screen data indicating the instruction operation, the conversion unit converts an operation of transmitting an instruction to the device in accordance with an operation to the terminal device into a program for causing the terminal device to execute the operation. In addition, the publishing unit transmits an instruction from the terminal device to the simulation unit.

In this configuration, the terminal device that executes the program transmits an instruction corresponding to the operation to the public server device instead of the control display device instructing the device, and the simulating means executes the device receiving the instruction. Simulate the input and output of.
As a result, the instruction from the terminal device is reflected on the device of the simulating means, and it is possible to simulate the control display device including the input operation in spite of the remote terminal device.

On the other hand, the recording medium according to the invention of claim 6 is:
In order to solve the above problem, a program for operating a first computer operating as a public server device or a second computer provided in a local control system as each means according to claim 1 is recorded. I have.

When a program is read from the recording medium having the above configuration and executed by the first and second computers, the communication system including the first and second computers is a communication system for control according to claim 1. Works as Therefore, it is possible to monitor and control the local control system from the remote terminal device in the same manner as the control display device of the local control system without burdening the user of the local control system and without impairing the safety of the local control system. A display device can be simulated.

In the control communication system according to the fourth aspect, the simulating means is provided in the public server device. However, a program for simulating the operation of the device to the terminal device is disclosed, and the simulating means is provided in the terminal device. It may be provided.

That is, the control communication system according to the invention of claim 7 is capable of connecting to a terminal device via the Internet and communicating with a public server device having storage means and the public server device via a wide area communication network. Possible, a control communication system provided with a local control system including a control display device, in order to solve the above problems,
Further, the control display device is a program executable by the terminal device by converting screen data indicating an operation of acquiring data of a device necessary for display and an operation of displaying a screen based on the acquired data. And conversion means for generating a program for causing the terminal device to execute an operation of simulating input / output of a device indicated by the screen data and an operation of displaying on the screen of the terminal device according to the simulated result; Writing means for storing the converted program in a storage means of the public server device, wherein the public server device is provided with a public means for transmitting the program in response to a request from the terminal device It is characterized by.

In the above configuration, instead of the simulation by the public server device of the control communication system according to the fourth aspect, the terminal device executing the program simulates the operation of the device, and displays the screen of the terminal device according to the simulation result. To be displayed.

Also in this configuration, a public server device different from the local control system publishes a program generated by converting screen data. As a result, claims 1 and 4
Similarly to the described control communication system, the local control system control display device can be provided from a remote terminal device without burdening the user of the local control system and without impairing the safety of the local control system. Can be simulated. It is possible to safely simulate a control display device of a local control system at a remote terminal device without distributing a display program.

The recording medium according to the invention of claim 8 is:
In order to solve the above-mentioned problem, a program for operating a first computer operating as a public server device or a second computer provided in a local control system as each means according to claim 7 is recorded. I have.

8. A control communication system according to claim 7, wherein when the program is read from the recording medium having the above configuration and executed by the first and second computers, a communication system including the first and second computers is provided. Works as Therefore, the control display device of the local control system can be simulated from a terminal device at a remote place without placing a burden on the user of the local control system and without impairing the safety of the local control system.

On the other hand, the control communication system according to the ninth aspect includes a public server device connectable to a terminal device via the Internet, and a local control system capable of communicating with the public server device via a wide area communication network. A communication system for control including the following means in order to solve the above problems.

That is, the public server device is provided with storage means for storing display data for displaying a predetermined state of the local control system of the user on the terminal device in association with each user, The local control system and the public server device communicate with each other at a predetermined timing, so that the public server device obtains state data indicating the state of each local control system. In response to a request from the device, the display data is transmitted to the terminal device, and among the status data, status data necessary for display by the display data is transmitted to the terminal device. The display data and the status data may be any data that allows the terminal device to display the status of the local control system based on the data. For example, the status data may be a measurement of a device provided in the local control system. Data indicating a value, a control amount, or the like may be used. Further, the display data may be, for example, data that instructs the terminal device to perform an operation of acquiring state data and a display operation according to the state data, such as an applet or a program executable by the terminal device. Alternatively, the public server device may create a screen indicating the status and transmit image data indicating the screen. In this case, the image data itself becomes state data, and a portion indicating the data format of the image data becomes display data.

In the above configuration, prior to the release of the display data, the storage means of the public server separate from the local control system stores the display data for displaying the status of each local control system on the terminal device, and stores the display data for each user. Is stored in association with. The display data may be, for example, a programmable display device provided in the local control system, which may be generated by converting screen data for displaying the state of the device, or commissioned by a user of the local control system. For example, a trader or the like may describe and generate a program for totalizing and displaying status data.

Further, the local control system and the public server device are set in advance according to a request from a terminal device, a predetermined event such as a time when a state changes, or a predetermined time interval. By communicating at the timing, the public server device obtains status data indicating the status of the local control system.

Here, when the terminal device accesses the public server device via the Internet and instructs display of the state of a desired local control system, the public server device
The display data for displaying the state of the local control system is read from the storage unit and transmitted to the terminal device. Further, the public server device transmits, to the terminal device, status data necessary for the terminal device to display based on the display data among the status data acquired at the above timing. Thereby, the terminal device can display the state of the local control system of the desired user.

In the control communication system as well, the display data is made public by a public server separate from the local control system, as in the first aspect, so that even if an unauthorized access is attempted, the unauthorized access is not disclosed. Concentrate on server equipment. In addition, since the destination to which the local control system transmits status data and the like is limited to the public server device, the confidentiality between the local control system and the public server device is higher than when transmitting to a large number of terminal devices. Easy to improve. As a result, although the status of each local control system can be displayed on the terminal device connected to the Internet, unauthorized access to the local control system can be prevented, and a more secure control communication system can be realized.

Each local control system only needs to be able to transmit status data to a specific public server device via a wide area communication network. As a result, each user does not need to train technicians who are skilled in the Internet, and can concentrate on only maintenance and management of the local control system, so that the burden on each user can be reduced.

Further, in a control communication system according to a tenth aspect of the present invention, in the configuration of the ninth aspect of the invention, the control display device provided in the local control system is referred to when displaying a device state. Screen data
Conversion means is provided for converting the display data into a display data format that can be displayed by the terminal device.

In the above configuration, since the conversion means is provided in the control communication system, there is no need to create a screen for the terminal device, and the labor for creating the screen can be greatly reduced.
Also, if you do not create special screen data for remote areas,
Since the screen for the remote area and the screen of the control display device are always kept the same, the time and effort required for management are reduced compared to the case where screen data for both sides is created separately and managed so that it is always the same. Can be significantly reduced.

According to a twelfth aspect of the present invention, there is provided a recording medium according to the ninth aspect, wherein a first computer operating as a public server device or a second computer provided in a local control system is provided. The program is characterized in that a program for operating as each of the means is recorded.

10. A control communication system according to claim 9, wherein when the program is read from the recording medium having the above configuration and executed by the first and second computers, the communication system including the first and second computers. Works as Therefore, the state of each local control system can be safely displayed from a remote terminal device without imposing a burden on the user of the local control system.

[0057]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] An embodiment of the present invention will be described below with reference to FIGS. That is, the control communication system according to the present embodiment can refer to and control the same screen or data as a programmable display arranged near the control target from a remote place without impairing the safety of the local control system. For example, as shown in FIG. 1, the system is determined by combining a programmable logic controller (PLC) 12 as a control device for controlling the device 11a of the target system 11 and a processing instruction word (tag). A local control system 2 including a programmable display 14 capable of controlling input and screen display based on screen data, and data indicating the state of the local control system 2 which can be connected to the local control system 2 via the Internet 3 Server device 4 that publishes
And a client device (terminal device) 5 connectable to the public server device 4 via the Internet 3.

As shown in FIG. 2, in the local control system 2, each programmable display 14 can be connected to the PLC 12 via the serial cable 13, and in many cases, in the vicinity of the target system 11, Operated by an operator. The programmable displays 14 are connected to each other by a network 15 including a local area network such as Ethernet (trademark: Xerox Corporation). Further, a control host computer 16 is connected to the network 15. In the present embodiment, the public server device corresponds to the first computer described in the claims, and the control host computer 16 corresponds to the second computer. The computer may be the programmable display 14.

Here, in the local control system 2, unlike the conventional control system 501 in which each PLC intervenes in communication processing in the local control system 2, a programmable display which is an essential component of the local control system 2 is provided. 14 is configured to handle most of the communication, and each programmable display 14 converts between a dedicated protocol specific to the model of the PLC 12 connected to itself and a common protocol in the network 15. , And relays communication between the PLC 12 and another programmable display 14 or control host computer 16. This allows
The programmable display 14 and the control host computer 16 can communicate with each other via the network 15 using a common protocol regardless of the type of the PLC 12 connected to the other programmable displays 14. As a result, compared to the control system 501, the PLC 12 of a different model
Are easily mixed in the local control system 2.

More specifically, as shown in FIG. 2, the programmable display 14 includes an interface (I / O) connected to a serial cable 13 or a network 15.
As an F) unit, a dedicated protocol IF unit 21 and a common protocol IF unit 22 are provided. Further, a protocol conversion unit 23 for relaying communication between the two, a screen data memory 24 for storing the screen data, and a touch panel A display processing unit 25 that performs a display process based on the screen data and the operation of the operator from the operation input unit 25a, the communication result, and the like
And Further, as another input means, a barcode reader 25b, an ID sensor (not shown), or the like may be provided.

In the present embodiment, the display processing unit 25
A plurality of unit screens can be switched, and each unit screen is
For example, as shown in FIG. 3, a static figure B such as a nameplate or the like whose display content is not changed, or a part figure J (J1 ) Is formed on the base screen. On the other hand, the screen data for displaying the screen is
As shown in FIG. 4, a file number F of the base screen and an event name N for specifying the operation content to be executed on the base screen
And a tag W including one or a plurality of pieces of reference information R referred to for each execution event. When the tag W is a display tag WL that displays a component graphic J corresponding to the content of a predetermined device address in a predetermined screen area (display coordinate range), as shown in FIG. A range (X / Y), a device address A, and a file number FL referred to at the time of display, such as a graphic file indicating ON and a graphic file indicating OFF when the component graphic J is a switch, are included. When the tag is an input tag, as shown in FIG. 6, the reference information R includes a valid input coordinate range (XY) and a device address A in which an input result is written.

On the other hand, the display processing unit 25 of the programmable display 14 operates the screen data memory 24 at predetermined time intervals.
, The file number F of the base screen is used to extract the display tag WL that is the base screen currently displayed, and the display tag WL
Of the device address A in the memory 1 of the PLC 12
2a, and the part graphic J corresponding to the content is displayed on the screen. For example, in FIG.
The display tag WL1 stored in No. 4 indicates the display of the switch, and corresponds to the device of the device address A1. When executing the display tag WL1, the display processing unit 2
5 indicates that the switch is OFF because the content of the device address A1 is "0", and among the files stored in the memory 25m of the display processing unit 25, the graphic of the file FL1 associated with OFF is displayed. Display coordinate range (X
Y). Thereby, the coordinate range (XY)
Displays a part graphic J1 indicating a switch in an OFF state. As described above, when the display processing unit 25 executes the display tag in the screen data at a predetermined time interval, the state of the device is reflected on the screen of the programmable display 14.

When an input operation of the operator such as a push operation on a touch panel (not shown) is received, the display processing unit 25, based on the screen data in the screen data memory 24, corresponds to the currently displayed base screen and performs the input operation. Is searched for, and the content of the device address A indicated by the input tag WT is changed according to the input result. For example, the valid input coordinate range (XY) is set to the part graphic J1.
And the same device address A1
If the operator presses the part graphic J1 on the display screen shown in FIG. 3 when the input tag WT1 for changing the content of
The input tag WT1 is found. In this case, the display processing unit 25, for example, instructs the dedicated protocol IF unit 21 or the common protocol IF unit 22 to input the tag WT.
Rewrite the contents of the device address A1 corresponding to No. 1. Further, after the input operation, when the display processing unit 25 processes the display tag WL1, the content of the device address A1 becomes "".
Since it has been changed to "1", the display processing unit 25 displays the part graphic J2 indicating ON on the screen corresponding to the file FL2 as shown in FIG.
5 can rewrite the contents of the device address according to the input operation and update the screen display according to the contents of the device address.

The device address A is an address for specifying a device to be controlled.
Programmable display 1 such as memory 12a of LC12
4 or PLC 12 or control host computer 16
1 shows an area of the storage device provided in the storage device. Further, the device may be a memory in which data manually input from an input device such as the operation input unit 25a or the barcode reader 25b is stored. Further, as will be described in detail later, for example, the dedicated protocol IF unit 21 and the common protocol IF unit 22 communicate with the PLC 12 and other programmable displays 14 to acquire the contents of each address or change the contents. You can do it. The acquisition / change of the contents may be instructed each time, or a cache may be prepared in the programmable display 14 to acquire / change the contents.
At the time of the change, the device may access the cache and synchronize with the entity of the device address A by communicating at predetermined time intervals or at predetermined events.

On the other hand, as shown in FIG. 2, the control host computer 16 includes a display processing unit 31 for monitoring and controlling the entire local control system 2 and a common protocol IF unit 32 connected to the network 15. A server unit 33 that communicates with each programmable display 14 via the protocol IF unit 32 and the network 15 and responds to requests from the display processing unit 31 and the like is provided. From the place,
The status of the target system 11, the PLC 12, or the programmable display 14 can be displayed and controlled.

The control host computer 16
Is provided with an image processing unit 34 for creating screen data of the programmable display 14 and a screen data memory 35 for storing the created screen data, and regulates the display / control operation of each programmable display 14. After the screen data is created (corrected) collectively by the drawing processing unit 34,
It is distributed to each programmable display 14 via the server 33, the common protocol IF 32 and the network 15.

Here, as described above, the screen data is configured by combining a tag indicating a correspondence between an area on the screen and an address of a device corresponding to display or input in the area, The drawing processing unit 34 displays, for example, a palette of tags, and prompts the user to select a tag in the palette and arrange a desired tag on the screen. Further, the drawing processing unit 34 displays the placed tags at the designated coordinates, and adjusts the coordinates of the tags according to the user's operation such as drag and drop. The image processing unit 34
Prompts the user to enter a device address associated with the input tag or display tag. As a result, the user can operate the drawing processing unit 34 to arrange the tags at desired positions on the screen and create screen data simply by associating each tag with a device address.

Accordingly, the display and operation of each programmable display 14 can be determined (changed) more easily than when the display program of the programmable display 14 is modified, and the user of the local control system 2 (the control host computer) can be determined. 16 users), the target system 11
, The operator's proficiency of the programmable display 14, or the user's preference.

Further, in the control communication system 1 according to the present embodiment, an applet for displaying a screen similar to the screen of the programmable display 14 on the client device 5 shown in FIG. Since the public server device 4 is provided, the public host server communication processing unit 3 that communicates with the public server device 4 via the Internet 3 is provided in the control host computer 16.
6 are provided. Note that when the local control system 2 and the public server device 4 perform cryptographic communication, the public server side communication processing unit 36 performs cryptographic communication with the public server device 4 using a predetermined encryption key or decryption key.

The public server communication processing unit 36 includes data for accessing the public server device 4 such as a telephone number of a provider and an address of the public server device 4 used for connection with the Internet 3, For example, data for authenticating itself in the public server device 4 such as an account name and a password in the public server device 4 are stored. For example, when an instruction from a user is given or when screen data is changed, The screen data in the screen data memory 35 can be transmitted to the public server device 4 by communicating with the public server device 4 at a desired timing.

The public server side communication processing unit 36
Accesses the public server device 4 at a predetermined timing, such as when the device content of the local control system 2 is changed or at a predetermined time interval, so that the content of the device address (device data ) Can be transmitted to the public server device 4. Note that the content of the device address is the same as the case where the display processing unit 31 acquires the device address.
It is obtained via the server unit 33. Further, the communication processing unit 36 on the public server side communicates with the public server device 4, when the client device 5 instructs to change the device content, when the display processing unit 31 changes the content of the device address A, and Similarly, the instruction can be relayed to transmit a content change instruction to the entity of the device address, such as the programmable display 14 itself or the PLC 12 connected to the programmable display 14.

On the other hand, as shown in FIG. 1, the public server device 4 includes a local control system side communication processing unit 4 for communicating with the local control system 2 via the Internet 3.
When the local control system side communication processing unit 41 receives the screen data from the local control system 2, the local control system side communication processing unit 41 converts the screen data into a Java (registered trademark) language applet that can execute the same processing in the virtual machine 51 of the client device 5. Compiler (conversion means) 42 and applet memory (storage means) 43 for storing the converted applet
And a data memory 44 for storing the device data received by the local control system side communication processing unit 41 from the local control system 2, and distributing an applet to the client device 5 via the Internet 3, and referring to the data memory 44. In addition, a public server unit (public unit) 45 that communicates with the client device 5 that executes the applet is provided. In the present embodiment,
The public server side communication processing unit 36, the local control system side communication processing unit 41, and the compiler 42 correspond to the writing unit described in the claims.

The compiler 42 previously stores a class including a method to be executed by the virtual machine 51 for each type of tag in a storage device (not shown). Generate code that calls the method to output the above applet.

Specifically, for example, in the case of a display tag, the method executed by the virtual machine 51 is called at a predetermined time interval, requests data of a specific device address to the public server unit 45, and sends a response to the response. This is a drawing method that performs display according to the input tag.In the case of an input tag, it is called when an input event occurs, and writes data according to the input result to a specific device address.
This is an input method for requesting the public server unit 45.

When receiving the screen data from the local control system side communication processing section 41, the compiler 42 extracts a tag from the screen data. Further, based on the tag type of the extracted tag, the compiler 42 generates an instance of a class corresponding to the tag type of the tag to be converted, and sets a character for setting a parameter of the tag in a field of the instance. Output a column (code). In the present embodiment, as shown in FIG. 8, a tag type and a parameter are designated as variables of the <param> element, and "G
pj. class ”generates an instance based on the variables and sets the parameters. When the output of the character string is completed for all the tags in the screen data, the compiler 42 outputs the HTML (HyperText Markup Language).
e) Each character string required for the document (such as "<HTML>" or "<TITLE>") or a character string for operating the generated code as an applet (such as <APPLET>) The compilation is terminated before and after the code generated based on the above, and the generated applet (HTML document) is stored in the applet memory 43.

As a result, based on the screen data used by the programmable display 14 for screen display or the screen data having the same structure, the compiler 42 has the same screen as when the programmable display 14 displays the screen data. Can be generated on the client device 5.

When the public server unit 45 receives a request from the client device 5, for example, a URI (Universal Resource
urce Identifier) based on the client device 5
Determines the screen data requested by, for example, CGI
(Common Gateway Interface) and BGI (Binary Gatew
An applet is transmitted to the client device 5 by using an ay Interface).

Further, upon receiving the inquiry about the contents of the device address A from the client device 5 which executes the distributed applet, the public server unit 45 receives a user area corresponding to the applet from the storage area of the data memory 44. Then, the content of the area corresponding to the device address A is read out, and a reply is sent to the client device 5. Further, when receiving the instruction to change the content of the device address A from the client device 5, the content of the area corresponding to the device address A is rewritten to a value corresponding to the instruction. Here, the local control system 2 and the public server device 4 are communicating with each other at the above-mentioned predetermined timing, and the contents of the data memory 44 are updated according to the instruction of the local control system 2 and the contents of the data memory 44 are updated. The change is notified to the local control system 2. Therefore,
The client device 5 can display and control the current status of the local control system 2.

In the applet memory 43 and the data memory 44, a storage area is allocated to a user of each local control system 2. The local control system side communication processing unit 41 stores, for example, an account name and a password. Authenticates and identifies the user of the local control system 2 and
The applet data and the device data generated based on the screen data from are stored in the storage area of the applet memory 43 or the data memory 44 in the area assigned to the identified user.

On the other hand, the client device 5 includes, in addition to the virtual machine 51, a browser 52 realized by, for example, general-purpose browser software. The browser 52 communicates with a device connected to the Internet 3. The virtual machine 51 can execute the received applet. In addition, the browser 52
For example, a document such as an HTML document can be received from any server device using the HTTP (Hyper Text Transfer Protocol) protocol and can be viewed.

The above members 21 to 25, 31 to 3
6, 41 to 45 and 51.52, an arithmetic unit such as a CPU executes a program stored in a storage unit such as a ROM or a RAM, and an input / output unit such as a touch panel or a liquid crystal display device, or an interface circuit. Is a functional block realized by controlling the communication circuit of FIG. Therefore, a computer having these means can store the program on a recording medium (for example,
CD-ROM, etc.) and execute the program, the programmable display 1
4. Control host computer 16, public server device 4.
And the client device 5 can be realized. In particular, the virtual machine 51 and the browser 5 of the client device 5
2 can be realized by general-purpose browser software preinstalled in many computers, so that these computers can operate as the client device 5 without installing a special program. In addition,
For example, if a program for downloading a program via the serial cable 13, the network 15, the Internet 3, or another communication path is installed in the computer in advance, the computer is connected via the communication path. The above program can also be distributed to

In the above configuration, in step 1 (hereinafter abbreviated as S 1) shown in FIG. 9, the user of the local control system 2
6 by operating the drawing processing unit 34 of the target system 11
The screen data is created / corrected in accordance with the actual situation of the above, the proficiency of the operator of the programmable display 14, or the preference of the user. Furthermore, the created screen data is delivered to the programmable display 14 in S2 after it is confirmed that the screen data operates normally by, for example, simulation or a connection test, and the programmable display 14 is converted into the screen data in S3. Start the corresponding display.

Here, since the optimum screen is also influenced by the taste and the proficiency, it cannot be determined uniquely and is often changed relatively frequently. However, as described above, in the present embodiment, the user of the local control system 2 (controlling host computer 16) can generate screen data by combining the tags, so that these requests can be flexibly dealt with and the optimum state can be achieved. Can be kept.
Further, since the control can be performed collectively by the control host computer 16, the screen data can be easily managed as compared with the case where the management is performed in many places in parallel.

When the screen data is updated, the control host computer 16 (public server side communication processing unit 3)
6) accesses the public server device 4 in S4, and the public server device 4 (the local control system-side communication processing unit 41) executes, for example, the combination of the account and password stored in advance and the received combination in S5. The local control system 2 or its user is authenticated, for example, by comparing If the authentication is successful, the screen data is transmitted from the local control system 2 to the public server device 4 in S6. On the other hand, when the public server device 4 receives the screen data, in S7,
The compiler 42 compiles the screen data to generate an applet, and stores the applet in the applet memory 43.

On the other hand, when the client device 5 accesses the public server device 4 via the Internet 3 and instructs to display the screen of the programmable display 14 of a certain local control system 2 (S11), the public server unit 45 indicates whether or not the display / control on the screen is permitted to the client device 5 by, for example, confirming whether or not the identification number and the password received from the client device 5 are a predetermined combination. Is authenticated, and access from the client device 5 that is not permitted is rejected (S12).

When the public server unit 45 confirms that the client device 5 is authorized, the public server unit 45 stores the HTML document including the applet requested by the client device 5 among the applets compiled in S7 into the applet memory. 43, and transmits the document to the client device 5 via the Internet 3 (S1).
3).

On the other hand, in S14, the browser 52 of the client device 5
A PLET element (a part of “</ APPLET>” from “<APPLET>”) is extracted and executed by the virtual machine 51. This allows
The virtual machine 51 communicates with the public server unit 45 to perform the same display / control as the programmable display 14.

Specifically, in the virtual machine 51,
A drawing method of an instance corresponding to each display tag in the applet is executed at a predetermined time interval. As a result,
The virtual machine 51 inquires the contents of the device address A to the public server device 4.

On the other hand, the public server unit 4 of the public server device 4
5 receives the inquiry, reads data from the area corresponding to the device address A in the storage area of the user corresponding to the applet in the data memory 44, and transmits the data to the client device 5. When the data is transmitted to the client device 5 via the Internet 3, the drawing method determines a predetermined display area (in the display screen of the client device 5) according to the data (contents of the device address A). XY) is updated.

Here, the applet is obtained by compiling screen data, and each instance in the applet is set so as to refer to the same device address as the corresponding tag in the screen data. In addition, each instance is created so as to display the same image as the tag when the contents of the device address are the same. Therefore, when the applet is executed, the client device 5
3 and FIG. 7, a component graphic J1 (J2) indicating the state of the device is displayed on the display screen of FIG.

Note that in the screen data according to the present embodiment,
The switching operation of each unit screen is also realized as an input tag, and the input tag has a device address as a device address.
The storage area in the programmable display 14 is associated with an area in which data indicating the currently displayed unit screen is stored. Therefore, when an applet obtained by compiling screen data of a certain programmable display 14 is executed by the client device 5, the same unit screen is always displayed on the client device 5 and the programmable display 14.

On the other hand, when an input operation such as a mouse operation is performed during the execution of the applet, the virtual machine 51 changes the input method of the instance corresponding to the input operation among the instances corresponding to the input tags in the applet. Execute. Thereby, the virtual machine 51
A request is made to the public server unit 45 to write data corresponding to the input result to a specific device address. Further, when receiving the write request, the public server unit 45 rewrites the contents of the area of the requested device address A in the storage area of the data memory 44. As a result, after writing on the display screen of the client device 5, the above-described drawing method is executed, and
As in 4, the operation result is reflected.

Here, the local control system 2 accesses the public server device 4 to synchronize the contents of the data memory 44 of the public server device 4 with the entity of the device address of the local control system 2. When synchronizing the contents of the data memory 44 and the entity of the device address, the transmission direction is determined in accordance with, for example, a change time or an operation priority.

For example, when updating the data memory 44 of the public server device 4 in accordance with the contents of the device address of the local control system 2, the public server side communication processing unit 36 And sends it as device data. Conversely, when the change of the data memory 44 is transmitted to the entity of the device address, the local control system side communication processing unit 41 of the public server device 4 transmits the data from the data memory 44 when the local control system 2 accesses. The device data is read and transmitted to the local control system 2. Further, when the public server-side communication processing unit 36 receives the device data, it transmits a content change instruction via the server unit 33 in the same manner as when the display processing unit 31 changes the content.

As described above, in the control communication system 1 according to the present embodiment, the programmable communication is performed from the public server device 4 provided separately from the local control system 2 to the client device 5 connected via the Internet 3. The data indicating the state of the display 14 is disclosed. Therefore, even if an unauthorized access is attempted, the unauthorized access is concentrated not on the local control system 2 but on the public server device 4.

Also, when transmitting and receiving the device data, the communication partner of the local control system 2 is limited to the public server device 4. It is easy to improve the confidentiality of the communication path with the public server device 4. Furthermore, since the device data and the screen data are transmitted separately, it is difficult to restore the screen of the programmable display 14 even if a part of the device data and the screen data is observed.

As a result, unauthorized access to the local control system 2 can be prevented even though the program can be distributed to the client device 5 connected to the Internet 3. Further, even if the operation of the public server device 4 is hindered due to unauthorized access, the local control system 2 controls the control target without any hindrance, but only hinders the distribution to the client device 5. it can. As a result, a more secure control communication system 1 can be realized.

[0098] In addition, when data is disclosed on the Internet 3, not only the above countermeasures against unauthorized access, but also settings for constant connection to the Internet 3 and selection of communication capacity with the Internet 3, etc. Since different skills are required from the management and maintenance of the local control system 2, when each user installs a public server device in the local control system, each user needs to train a technician who is familiar with these skills. is there.

On the other hand, in the present embodiment, since each local control system 2 only needs to communicate with a specific public server device 4 via the Internet 3, setting and selection of communication capacity are easy. As a result, each user does not need to train technicians who are familiar with the Internet 3 and can concentrate on the management and maintenance of the local control system 2, so that the burden on each user can be reduced.

On the other hand, the public server device 4 requires technicians who are familiar with the Internet 3. However, since the number of users is smaller than in the case where each user is trained individually, the technology in the entire control communication system 1 is required. People can be reduced. Further, since the public server device 4 publishes the program of each user, it is possible to reduce management and maintenance work such as disk capacity and communication capacity as compared with a case where each user publishes the program separately.

In particular, since the amount of data communication with the Internet 3 changes according to the number of accesses, when the public server device 4 is accessed from an unspecified number of terminal devices, it is necessary to predict the required communication capacity. Is extremely difficult. However, in this embodiment, since the public server device 4 publishes the program of each user, even if the communication capacity is set with a margin of the same ratio as when each is installed separately, the communication capacity is set higher than in the separate case. Therefore, the margin of communication capacity (data communication amount) increases. Therefore, even if the data traffic related to a certain user suddenly increases due to an increase in the number of accesses to a program by a certain user, the data traffic increases if the data traffic related to another user does not increase. Can be absorbed. As a result, it becomes easier to set the communication capacity as compared with the case where the public server devices are separately provided.

In the control communication system 1 according to the present embodiment, the compiler 42
The public server device 4 distributes an applet obtained by converting screen data. Accordingly, unless the screen for the client device 5 is designed, the screen of the programmable display 14 and the screen of the client device 5 can be kept in common, and the management and maintenance of the screen can be maintained as compared with the case where each is created separately. You can save time.

In this embodiment, the case where the local control system 2 accesses the public server device 4 and synchronizes device data has been described. However, the present invention is not limited to this. 2 may be accessed to synchronize device data. However, in this case, since the local control system 2 needs to respond to the access from the public server device 4, it needs to be constantly connected to the Internet 3. Even in this case, since the access source is limited, the confidentiality can be improved as compared with the case where the access from the client device 5 is permitted, but the setting when connecting to the Internet 3 is troublesome. Therefore, when the local control system 2 and the public server device 4 are connected via the Internet 3, the local control system 2
It is preferable to access from.

The applet memory 43 according to the present embodiment stores an applet generated by converting the screen data by the compiler 42, but the present invention is not limited to this. For example, an applet that displays based on device data, such as an applet that displays data obtained by statistically processing device data, may be used. Note that the applet may be created by a user of the local control system 2 or an operator of the public server device 4.

Even in this case, since the device data is synchronized between the local control system 2 and the public server device 4, the client device 5 does not communicate directly with the local control system 2 but 2 can be displayed. Also, since the device data only needs to be transmitted, the setting on the local control system 2 side can be simplified. Therefore, the state of the local control system 2 can be safely displayed on the remote client device 5 without imposing a burden on the user of the local control system 2.

[Second Embodiment] In the first embodiment, the local control system 2 and the public server 4 communicate with each other at a predetermined timing, and the public server 4 communicates with the client 5 by the local control system 2. A case has been described in which each client device 5 monitors and controls the local control system 2 from a remote location by transmitting device data.

On the other hand, in the present embodiment, as shown in FIG. 10, a simulator (simulation means) 46 is provided in place of the data memory 44 of the public server device 4 shown in FIG. A configuration for monitoring and controlling not the control system 2 but a virtual local control system will be described.

That is, in the public server device 4a according to the present embodiment, the simulator 46 for simulating the input / output of the device of the local control system 2 is provided. The change instruction is transferred to the simulator 46. The simulator 46 may, for example, simulate the input / output of the device by an operation according to the characteristics of the device itself, or output the previous output, the current input, or the time or the number of references, and the output of the device. May be stored in advance, and input / output of the device may be simulated by referring to the table. Note that the simulator 46 is also a functional block realized by the arithmetic unit executing a program stored in the storage unit, like the other members.

According to this configuration, similarly to FIG. 1, the screen data from the local control system 2 is converted into an applet by the compiler 42, and the applet is made public. Therefore, regardless of the installation location, the local control system 2 is stored in the client device 5 except for the status of the device.
The same screen as that of the programmable display 14 is displayed. Also in the control communication system 1a, the client device 5 communicates with the public server device 4a instead of the local control system 2.

As a result, the virtual local control system 2 realized by the simulator 46 can be monitored and controlled by the client device 5 located at a remote place while preventing unauthorized access to the local control system 2. Therefore, the user can simulate the actual operation / operation result of the programmable display 14 with the client device 5, and can be suitably used, for example, for training the operator of the programmable display 14 of the local control system 2.

Third Embodiment In the second embodiment, the case where the simulator 46 is provided in the public server device 4 has been described as an example, but the same operation as that of the programmable display 14 is performed by the client. An applet that causes the client device 5 to execute the same operation as the simulator 46 may be sent together with the applet that the device 5 executes.

That is, as shown in FIG. 11, in the public server device 4b according to the present embodiment, an applet for simulating the input / output of the device of the local control system 2 to the client device 5 is provided instead of the simulator 46 of FIG. A stored simulator applet memory 47 is provided, and the public server unit 45 stores the applet memory 4
Along with the applet of (3), the applet of the applet memory for simulator 47 (applet for simulator)
It is transmitted to the client device 5.

On the other hand, when the virtual machine 51 of the client device 5 executes the simulator applet, a simulator similar to the simulator 46 is formed in the client device 5. Applet memory 4
When the applet stored in the public server unit 4 is executed by the client device 5, the client device 5
Instead of making an inquiry to the client 5, a screen is displayed based on the result of the inquiry made to the simulator in the client device 5.

In this configuration, as in FIG. 1, the screen data from the local control system 2 is converted into an applet by the compiler 42, and the applet is made public. Therefore, regardless of the installation location, the same screen as the programmable display 14 of the local control system 2 is displayed on the client device 5 except for the status of the device. Also in the control communication system 1a, the client device 5 communicates with the public server device 4b instead of the local control system 2.

As a result, while preventing unauthorized access to the local control system 2, the virtual local control system 2 realized by the simulator of the client device 5 is monitored and controlled from the client device 5 located at a remote place. it can. Therefore, for example, it can be suitably used for training the operator of the programmable display 14 of the local control system 2.

In the first to third embodiments, the local control system (2) and the public server device (4
4a and 4b), the case of connecting via the Internet (3) has been described, but the present invention is not limited to this.
The connection may be made via a wide area communication network such as a public telephone line network. However, unlike the public telephone network, the Internet does not secure a line between the sender and the receiver,
Communication costs are often set low. Therefore, for example, when the local control system is installed in a country different from the country in which the public server device is installed, or when the distance between them is large, the connection is established via the Internet as in the above embodiments. Is more preferred.

Further, in each of the above embodiments, the case where the compiler (42) is provided in the public server device has been described. However, the present invention is not limited to this. A compiler is provided in the local control system, and the public server device receives the applet. You may. If you publish the compiled and generated applet, the same effect can be obtained.

Further, in each of the above embodiments, the operation of transmitting the same inquiry / change instruction as the programmable display (14) to the public server or the simulator and the operation of displaying the response / response to the client device (5) are performed on the client device (5). The case where an applet to be performed is generated has been described as an example, but the present invention is not limited to this.

For example, if the public server device has a bitmap format having the same contents as the screen display of the programmable display,
Generate a PEG file and send it to the client device.
The file may be transmitted. After the compiler receives the data indicating the screen of the programmable display, changes the format of the data into a format that can be displayed by the client device, and then transmits the data to the client device, the display / control of each programmable display is performed. It is not necessary to previously install the program for the client device on the client device, so that it is possible to reduce the labor, time and cost of installation.

However, if the public server device and the client device are communicating via the Internet,
When the communication speed between the two is low, if the data indicating the screen is transmitted, the update speed of the screen in the client device is reduced.

On the other hand, in the present embodiment, since an applet that causes the client device to perform the above inquiry, change instruction, and display operation is distributed, the data transmission amount can be significantly reduced, and the response speed in the client device can be reduced. Can be greatly improved. Further, for example, a user interface such as cursor movement can be processed on the client device side, so that the response speed can be further improved.

Further, in each of the above-described embodiments, the case where the applet is made public has been described as an example. However, instead of the applet, the applet is created by compiling a programming language such as basic, for example. Even if an execution program for causing the client device (5) to execute the operation is distributed, substantially the same effect can be obtained.

However, when the virtual machine (51) of the client device interprets and displays and controls the applet as in the present embodiment, if the client device has a virtual machine, the operating system of the client device ( An applet can be executed even if the machine language executable by the OS or the CPU is different. Therefore, the display / control can be performed by more client devices in the same manner as the programmable display device without increasing the types of applets distributed by the public server device.

[0124]

As described above, the control communication system according to the first aspect of the invention converts the screen data of the control display device provided in the local control system and converts the device data indicated by the screen data. A conversion unit that generates a program that causes the terminal device to execute an operation of inquiring the public server device and an operation of displaying the operation on the screen of the terminal device in response to the inquiry; In response to the above request, a transmitting means is provided for transmitting the program and responding to an inquiry from a terminal device executing the program in place of the device.

In the above configuration, a public server device different from the local control system publishes a program generated by converting screen data, and responds to a terminal device that executes the program. Therefore, it is possible to monitor and control the local control system from the remote terminal device in the same manner as the control display device of the local control system without burdening the user of the local control system and without impairing the safety of the local control system. There is an effect that the display device can be simulated.

[0126] In the control communication system according to the second aspect of the present invention, as described above, in the configuration of the first aspect, the publishing means is configured to control the terminal based on a communication result with the local control system. This is a configuration that responds to an inquiry from the device.

According to this configuration, the publishing means of the publishing server device communicates with the local control system and responds to the inquiry from the terminal device, so that the local control system can be safely monitored from the remote terminal device. It has the effect of being able to.

[0128] In the control communication system according to the third aspect of the present invention, in the configuration of the second aspect of the present invention, when the conversion means receives screen data indicating an instruction operation to the device, In addition to converting an operation of transmitting an instruction to the device in response to an operation to the device into a program to be executed by the terminal device, the publishing unit transmits the program to the local control system in response to the instruction from the terminal device. This is a configuration for transmitting an instruction to a device.

In the above configuration, the terminal device that executes the program transmits an instruction corresponding to the operation to the public server device instead of the control display device instructing the device, and the public means of the public server device uses the local Send instructions to the control system. As a result, there is an effect that the local control system can be safely controlled from a remote terminal device.

On the other hand, in the control communication system according to the fourth aspect of the present invention, as described above, in the configuration of the first aspect of the present invention, the publishing means includes input / output of a device provided in the local control system. This is a configuration provided with a simulation means for simulating.

In this configuration, the simulating means of the public server simulates input / output of a device of the local control system. As a result, the control display device of the local control system can be safely simulated by the terminal device at a remote place, and for example, it is possible to use the control display device of the local control system in an operator training. .

In the control communication system according to a fifth aspect of the present invention, as described above, in the configuration of the fourth aspect of the present invention, when the conversion means receives the screen data indicating the instruction operation, the conversion means transmits the instruction data to the terminal device. In addition to converting the operation of transmitting an instruction to the device in response to the operation to a program to be executed by the terminal device, the publishing unit transmits the instruction from the terminal device to the simulation unit.

In this configuration, the terminal device that executes the program transmits an instruction in accordance with the operation to the public server device instead of the control display device instructing the device, and the simulating means executes the device receiving the instruction. Simulate the input and output of.
As a result, the instruction from the terminal device is reflected on the device of the simulating means, and there is an effect that the control display device can be simulated including the input operation in spite of the remote terminal device.

The recording medium according to the sixth aspect of the present invention operates the first computer operating as a public server device or the second computer provided in the local control system as each means of the first aspect as described above. This is a configuration in which a program to be executed is recorded.

When a program is read from the recording medium having the above configuration and executed by the first and second computers, the communication system including the first and second computers becomes the control communication system according to claim 1. Works as Therefore, it is possible to monitor and control the local control system from the remote terminal device in the same manner as the control display device of the local control system without burdening the user of the local control system and without impairing the safety of the local control system. There is an effect that the display device can be simulated.

The control communication system according to the invention of claim 7 converts the screen data provided in the local control system to simulate the input / output of the device indicated by the screen data, as described above. And a conversion unit for generating a program for causing the terminal device to execute an operation to be displayed on the screen of the terminal device in accordance with the simulated result. The public server device includes, in response to a request from the terminal device, Is disclosed.

In the above configuration, a public server device different from the local control system publishes a program generated by converting screen data. As a result, claims 1 and 4
Similarly to the described control communication system, the local control system control display device can be provided from a remote terminal device without burdening the user of the local control system and without impairing the safety of the local control system. This has the effect of being able to simulate.

As described above, the recording medium according to the invention of claim 8 operates the first computer operating as the public server device or the second computer provided in the local control system as each means according to claim 7. This is a configuration in which a program to be executed is recorded.

When the program is read from the recording medium having the above configuration and executed by the first and second computers, the communication system including the first and second computers becomes a control communication system according to claim 7. Works as Therefore, there is an effect that the control display device of the local control system can be simulated from a remote terminal device without imposing a burden on the user of the local control system and without impairing the safety of the local control system.

In the control communication system according to the ninth aspect, as described above, the display data for displaying the state of the local control system of a predetermined user on the terminal device is stored in the public server device. The local control system and the public server communicate with each other at a predetermined timing to store status data indicating the state of each local control system. And the public server device transmits the display data to the terminal device in response to a request from the terminal device, and, among the status data, the status data necessary for display by the display data. This is a configuration for transmitting to the terminal device.

In the above configuration, the local control system and the public server communicate at a predetermined timing,
The public server acquires the status data of the local control system, and a public server separate from the local control system publishes the status data of the local control system and the display data for displaying the status data. Therefore, there is an effect that the local control system can be safely monitored from a remote terminal device without putting a burden on the user of the local control system.

According to a tenth aspect of the present invention, as described above, in the configuration of the ninth aspect, the screen data of the control display device provided in the local control system is transmitted to the terminal. In this configuration, the apparatus is provided with a conversion unit that converts the display data into a format that can be displayed by the device.

In this configuration, since the conversion means is provided in the control communication system, there is no need to create a screen for the terminal device, and the effect of greatly reducing the time and effort of screen creation and management can be achieved.

The recording medium according to the eleventh aspect of the present invention, as described above, operates as a first public server device.
A program for operating a computer or a second computer provided in a local control system as each means according to claim 9 is recorded.

10. A control communication system according to claim 9, wherein when the program is read from the recording medium having the above configuration and executed by the first and second computers, a communication system including the first and second computers is provided. Works as Therefore, there is an effect that the state of each local control system can be safely displayed from a remote terminal device without putting a burden on the user of the local control system.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a block diagram illustrating a main configuration of a control communication system.

FIG. 2 is a block diagram showing a main configuration of a local control system in the control communication system.

FIG. 3 is a diagram showing a relationship between screen data and a display screen in the control communication system, wherein a switch is OF;
It is explanatory drawing which shows the time of F state.

FIG. 4 is an explanatory diagram showing a data structure of a tag included in the screen data.

FIG. 5 is an explanatory diagram showing an example of a data structure of a display tag among the tags.

FIG. 6 is an explanatory diagram showing an example of a data structure of an input tag among the tags.

FIG. 7 shows a relationship between screen data and a display screen in the control communication system, wherein a switch is turned on.
It is explanatory drawing which shows the case where it was set to.

FIG. 8 is an explanatory diagram showing a main part of an applet generated by a compiler in the control communication system.

FIG. 9 is a flowchart showing the operation of the control communication system.

FIG. 10 shows another embodiment of the present invention, and is a block diagram illustrating a main configuration of a control communication system.

FIG. 11, showing still another embodiment of the present invention, is a block diagram illustrating a main configuration of a control communication system.

FIG. 12 is a block diagram showing a conventional technique and showing a main configuration of a control system.

FIG. 13 shows a prior application filed by the present applicant,
FIG. 2 is a block diagram illustrating a main configuration of a control communication system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Control communication system 2 Local control system 3 Internet 4.4a / b public server device (1st computer) 5 client device (terminal device) 16 control host computer (2nd computer) 36 public server side communication processing part (writing Means) 41 Local control system side communication processing unit (writing means) 42 Compiler (conversion means; writing means) 43 Applet memory (storage means) 45 Public server unit (publication means) 46 Simulator (simulation means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masao Saito, Inventor 8-2-52, Nanko-Higashi, Suminoe-ku, Osaka-shi, Osaka Digital Co., Ltd. 2-52 Digital Co., Ltd. F-term (reference) 5B045 AA05 HH02 HH07 5H220 BB09 BB17 CC09 CX09 EE10 HH01 HH04 JJ12 JJ29 JJ53 JJ59

Claims (11)

[Claims] 1. A public server device having storage means connectable to a terminal device via the Internet, and a local control system including a control display device capable of communicating with the public server device via a wide area communication network. The control communication system further comprises: the control display device converts screen data indicating an operation of acquiring data of a device necessary for display and an operation of displaying a screen based on the acquired data. The terminal device is an executable program, and further includes an operation of inquiring the public server device of data of a device indicated by the screen data, and an operation of displaying the device data on the screen of the terminal device in response to the inquiry. Conversion means for generating a program to be executed by the terminal device; and storing the converted program in storage means of the public server device The public server device transmits the program in response to a request from the terminal device, and responds to an inquiry from the terminal device executing the program in place of the device. A communication system for control, wherein a disclosure means is provided. 2. The control communication system according to claim 1, wherein said disclosure means responds to an inquiry from said terminal device based on a result of communication with said local control system. 3. The screen data may also include data indicating an operation that the control display device instructs the device in response to an operation, and the conversion unit, when receiving the screen data indicating the instruction operation, Along with converting the operation of transmitting an instruction to the device in response to an operation to the terminal device into a program to be executed by the terminal device, the publishing unit transmits the instruction to the local control system in response to the instruction from the terminal device, 3. The control communication system according to claim 2, wherein an instruction to said device is transmitted. 4. The control communication system according to claim 1, wherein said disclosure means includes a simulation means for simulating input / output of a device provided in said local control system. 5. The screen data may also include data indicating an operation instructed by the control display device to the device in response to an operation, wherein the conversion unit receives the screen data indicating the instruction operation. In addition to converting an operation of transmitting an instruction to the device in response to an operation to the terminal device into a program to be executed by the terminal device, the publishing unit transmits the instruction from the terminal device to the simulation unit. The control communication system according to claim 4, wherein 6. A first computer which can be connected to a terminal device via the Internet and has a storage means, and which is provided in a local control system having a display device for control and which is connected to the first computer via a wide area communication network. A communication medium including a communicable second computer, and a recording medium readable by recording a program for operating the communication system as a control communication system, wherein the control display device stores device data necessary for display. The terminal device converts screen data indicating an operation to be acquired and an operation to display a screen based on the acquired data, and inquires the first computer of data of a device which is a program executable by the terminal device and which is indicated by the screen data. An operation and an operation to be displayed on the screen of the terminal device in response to the inquiry are performed on the terminal device. A conversion means for generating a program to be executed, and a writing means for storing the converted program in the storage means, a program for operating the first computer or the second computer, and in response to a request from the terminal device, A recording medium storing a program for operating the first computer as a publishing unit that transmits a program stored in a storage unit and responds to an inquiry from a terminal device that executes the program instead of the device. . 7. A public server device having storage means connectable to a terminal device via the Internet, and a local control system including a control display device capable of communicating with the public server device via a wide area communication network. The control communication system further comprises: the control display device converts screen data indicating an operation of acquiring data of a device necessary for display and an operation of displaying a screen based on the acquired data. In addition, the terminal device is an executable program, furthermore, the operation of simulating the input and output of the device indicated by the screen data, and the operation of displaying on the screen of the terminal device according to the simulated result, Conversion means for generating a program to be executed by the device, and writing means for storing the converted program in a storage means of the public server device, Serial The public server apparatus, said in response to a request from the terminal device, control communication system, wherein a public means for transmitting the program is provided. 8. A first computer which can be connected to a terminal device via the Internet and has a storage means, and is provided in a local control system having a display device for control and which is connected to the first computer via a wide area communication network. A recording medium storing a program for causing a communication system including a communicable second computer to operate as a control communication system, wherein the control display device obtains data of a device necessary for display and obtains the data. The terminal device converts the screen data indicating the operation of displaying the screen based on the obtained data, and is a program executable by the terminal device, and furthermore, the operation of simulating the input / output of the device indicated by the screen data, and the simulated operation. Converting means for generating a program for causing the terminal device to execute an operation to be displayed on the screen of the terminal device according to the result; and And transmitting, as writing means for storing the converted program in the storage means, a program for operating the first or second computer, and a program stored in the storage means in response to a request from the terminal device. As the disclosure means, the first
A recording medium on which a program for operating a computer is recorded. 9. A control communication system comprising: a public server device connectable to a terminal device via the Internet; and a local control system capable of communicating with the public server device via a wide area communication network. The server device is provided with storage means for storing display data for causing the terminal device to display a predetermined state of the local control system of the user on the terminal device in association with each of the users. When the server device communicates at a predetermined timing, the public server device acquires status data indicating the status of each local control system, and the public server device responds to a request from the terminal device. Transmitting the display data to the terminal device,
A control communication system characterized by transmitting, to the terminal device, status data necessary for display by the display data among the status data. 10. A conversion means for converting screen data referred to when a control display device provided in the local control system displays the status of a device into display data in a format that can be displayed by the terminal device. 10. The control communication system according to claim 9, wherein: 11. A communication system comprising: a first computer connectable to a terminal device via the Internet; and a second computer provided in a local control system and capable of communicating with the first computer via a wide area communication network. A storage medium storing a program to be operated as a control communication system, wherein display data for displaying a predetermined state of a local control system of a user on the terminal device is stored in association with each user. As means, a program for operating the first computer, and a second computer of each of the local control systems and the first computer communicating at a predetermined timing to indicate a state of each local control system. A program for causing the first computer to acquire data; The first computer transmits the display data to the terminal device in response to a request from the terminal device, and transmits, to the terminal device, state data necessary for display by the display data among the state data. A recording medium on which a program is recorded.