JPH08202644A - Monitor and control system - Google Patents

Abstract

PURPOSE: To provide a monitor and control system having plural terminals which switches an input device by the terminals via a network connecting these terminals together and uses the input information on the input device in common among the terminals. CONSTITUTION: In the monitor and control system having plural terminals which are connected to each other via a data communication means, an input device 15 is connected to a specific terminal, and a terminal address that outputs the input data is calculated based on the input information given from the device 15. A notification means 17 outputs the data to a virtual input means 18a of its own terminal 12a when the calculated terminal address points the terminal 12a. On the other hand, the means 17 outputs the data to a virtual input means 18b of another terminal 12b via a communication means 20a when the terminal address points the terminal 12b. Thereby, the input information on the device 15 can be used in common among the terminals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control system in which a plurality of terminals for supervisory control are operated by a common input device.

[0002]

2. Description of the Related Art In a supervisory control system that manages the operation of a plant or the like, a console desk is provided by grouping together terminals with three or so CRT displays. It is managed by staff.
Therefore, it is general that one person operates about three monitoring and control terminals provided on one desk, and the operator displays different monitoring screens for each terminal on the same desk. Then, the situation of the plant is grasped, or a specific symbol on the screen is selected to perform a control operation. In addition, each terminal basically consists of the same software and the same hardware, and the network that connects these terminals to the plant allows the same information to be displayed. The screen allows independent operation for each terminal.

Conventionally, in this type of monitor control system, the input device is commonly used to improve the operability so that one person can easily operate a plurality of terminals. FIG. 10 shows such a conventional supervisory control system. In FIG.
Is a plant, 2a and 2b are terminal controllers for monitoring and controlling this plant, 3a and 3b are displays for displaying the status of the plant by each controller, and 4 is a transmission line between the terminal controllers 2a and 2b and the plant 1. A network to be connected, 5 is an input device commonly provided to each terminal, and 6 is physically connected to the terminal controller 2a or 2b which is switched by switching the connection of the signal line. It is an input switching device.

In the conventional device, the input device 5 includes a keyboard, a mouse, a touch panel, a switch, a tablet, etc. When switching the input device 5, the input switching device 6 is used.
The connection of the input device 5 to the controller of each terminal was switched via the switching contact by operating the switch of. By this switching, the operator has shared one input device for each terminal.

[0005]

Since the conventional monitoring control system is configured as described above, when the input switching device 6 is operated to switch the input device 5, the contact of the switching contact of the input switching device 6 is touched. Due to a defect, an abnormal signal due to chattering is mixed into the controller side, and the controllers 2a and 2b of the terminal malfunction or hang up. Also, when switching during input operation, the signal being input may be interrupted midway and an incorrect code may be generated. Also, the interface circuit of the input device is
Since it is provided on the controller side, there is a problem in that there is an input device that requires an operation of initializing this interface circuit every time the input device is switched, which complicates the operation and processing for each switching.

The present invention has been made in order to solve the above-mentioned problems and uses a network connecting terminals to eliminate the need for a switching device and to provide an input device with a plurality of terminals. The purpose is to obtain a supervisory control system that can be shared.

[0007]

According to a first aspect of the present invention, there is provided a supervisory control system, a communication means for performing data communication between controllers of respective terminals, and an input device connected to a controller of a specific terminal among these terminals. , Provided in the specific terminal, calculates the terminal address for outputting the input information data input from the input device, if the terminal address indicates the own terminal, the data output to the virtual input means of the own terminal, When the terminal address indicates another terminal, a notification means for outputting data to the terminal via the communication means and a terminal other than the specific terminal are provided, and the data is transmitted from the notification means via the communication means. It is provided with receiving means for outputting the received input information to the virtual input means of the terminal as data.

A monitoring control system according to a second aspect of the present invention has, as an input device, a relative coordinate input device for inputting a relative coordinate movement amount, and a notification means of a specific terminal provided with the input device. The terminal address is calculated from the movement amount of the coordinates, and the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address.

A monitoring control system according to a third aspect of the present invention has an absolute coordinate input device for inputting an absolute coordinate position as an input device, and the notification means of a specific terminal provided with the input device is the above-mentioned. The terminal address is calculated from the coordinate position, and the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address.

A monitor control system according to a fourth aspect of the present invention comprises a coordinate input device for inputting coordinates as an input device,
A notification means of a specific terminal having a keyboard and provided with these input devices calculates a terminal address from the coordinates, and input information input from the keyboard to a virtual input means of the terminal indicated by the terminal address. Is output as data.

According to a fifth aspect of the present invention, a monitor control system has a terminal changeover switch as an input device, and the notifying means of a specific terminal provided with the input device outputs a terminal address by a switching signal of the terminal switch. The input information input from the input device is calculated and data is output to the virtual input means of the terminal indicated by the terminal address.

According to a sixth aspect of the present invention, in the monitor control system, the display of each terminal has a cursor display indicating the coordinate position input from the coordinate input device, and the specific terminal provided with this coordinate input device has a cursor display. The notifying unit outputs the coordinate information corresponding to the position of the cursor display to a predetermined terminal indicated by the terminal address, and when the terminal address is switched to another terminal address, the terminal indicated by the original terminal address On the other hand, a signal for erasing the cursor display from the display of this terminal is transmitted.

According to a seventh aspect of the present invention, in the monitoring control system, the communication means has a communication buffer in order to output the input information to the other terminal from the notification means of the specific terminal provided with the input device. The storage capacity of the communication buffer is reduced so that the input information sent from the notification means to another terminal can be immediately sent out.

[0014]

In the supervisory control system according to claim 1 of the present invention, the notifying means provided in the controller of the specific terminal takes in the input information from the input device provided in this terminal and outputs the input information as data. When the address is calculated, if this terminal address indicates the own terminal, data is output to the virtual input means of the own terminal, and if the above terminal address indicates another terminal, data communication is performed between the controllers of each terminal to that terminal. Data is output via the communication means, and the reception means provided in a terminal other than the specific terminal outputs the input information received from the notification means via the communication means to the virtual input means of the terminal. To do.

According to a second aspect of the present invention, the monitoring control system has a relative coordinate input device as an input device for inputting a relative coordinate movement amount, and the notifying means of a specific terminal provided with the input device, A terminal address is calculated from the movement amount of the coordinates, and the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address.

The monitoring control system according to claim 3 of the present invention has an absolute coordinate input device for inputting an absolute coordinate position as an input device, and the notifying means of a specific terminal provided with the input device is the coordinate device. The terminal address is calculated from the position, and the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address.

According to a fourth aspect of the present invention, the monitoring control system has a coordinate input device for inputting coordinates as an input device and a keyboard, and the notifying means of a specific terminal provided with these input devices is the coordinate device. The terminal address is calculated from, and the virtual input means of the terminal indicated by the terminal address,
The input information input from the keyboard is output as data.

According to a fifth aspect of the present invention, in the supervisory control system, a terminal changeover switch is provided as an input device, and the notifying means of a specific terminal provided with the input device calculates a terminal address by a switching signal of the terminal switch. Then, the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address.

According to a sixth aspect of the present invention, in the monitor control system, the display of each terminal has a cursor display indicating the coordinate position input from the coordinate input device, and the notification of the specific terminal provided with this coordinate input device. The means outputs the coordinate information corresponding to the position of the cursor display to a predetermined terminal indicated by the terminal address, and when the terminal address is switched to another terminal address, the terminal indicated by the original terminal address is displayed. On the other hand, a signal for deleting the cursor display from the display of this terminal is transmitted.

According to a seventh aspect of the present invention, in the supervisory control system, the notification means of a specific terminal provided with an input device
In order to send the input information to the other terminal, the communication means has a communication buffer, and the storage capacity of the communication buffer is reduced, so that the input information sent from the notifying means to the other terminal is immediately sent.

[0021]

【Example】

Example 1. 1 is a hardware configuration diagram showing a supervisory control system according to a first embodiment of the present invention.
11 is a plant to be monitored and controlled, and 12a and 12b
Is a controller of a terminal for monitoring and controlling the plant 11, and 13a and 13b are displays for displaying the status of the plant by the controller of each terminal. As the display, a CRT, a liquid crystal panel, a plasma display or the like is used. 14 is the terminal controller 12a,
A network connecting the 12b and the plant 11 by a transmission line, and 15 is an input device commonly provided to each terminal. The input device includes a keyboard, a mouse, a touch panel, a switch, a tablet, and the like. This Example 1
Now, an input device (for example, a mouse) for inputting relative coordinates will be described. Reference numeral 16 is an input interface (hereinafter, abbreviated as input I / F) that converts input data of the input device 15 into digital data handled inside the controller.

Further, 17 is a notifying means for inputting the input information read from the input I / F 16, calculating the terminal address of the output destination based on this input information, and outputting the input information as data to the terminal indicated by this terminal address. 18a and 18b are virtual input means for taking in the input information output from the notification means 17, 19a and 19b are application software of each terminal, 20a and 20b are communication means for transmitting and receiving data between each terminal and the network 14, and 21 is a notification. It is a receiving means for receiving the input information transmitted by the means 17 via the communication means 20a, 20b and the network 14.

Further, although FIG. 1 shows an example in which there are two supervisory control terminals, it shows a representative case in which a plurality of similar terminals are provided, and those with a suffix "a" are input. The terminal having the device 15 and the one b indicate the terminal to which the input device 15 is not directly connected.

Next, the operation will be described. The terminal of the supervisory control system is installed in a central control room or the like and monitors and controls the plant 11.
a and 12b operate according to the programs of the application software 19a and 19b, and the monitoring data are fetched by the communication means 20a and 20b via the controller provided at the site of the plant 11 by the network 14 that is spread over the entire plant. , Displays 13a, 13
Display in b. Further, the input information operated by the input device 15 is taken into the application software 19a, 19b via the virtual input means 18a, 18b and the like, and the monitoring data is acquired when the control of the plant 11 is involved according to the processing of this software. Control information is output to the plant 11 through a route that is the reverse of the case.

In the supervisory control system according to the first embodiment of the present invention, the input device 15 is connected to a plurality of terminals, that is, the controller 1.
2a and 12b are provided in common, and the input information from the input device 15 is transmitted by using the network 14 provided in each terminal and the communication means 20a and 20b to transmit the input information. It is designed to be shared by multiple terminals.

The input information from the input device 15 is the input I /
It is fetched as digital data by the notification means 17 of the controller 12a via F16. The input device 15 is a relative coordinate input device such as a mouse that detects the amount of movement of coordinates, and the notification means 16 displays the screen of L terminals sharing the input device 15 from the amount of movement of the coordinates as shown in FIG. Corresponding to, the position of the vertical coordinate (hereinafter referred to as the Y coordinate) and the virtual horizontal coordinate (the coordinate connecting the screens of all terminals sharing the input device, referred to as the X * coordinate hereinafter) are calculated. However, the display sizes of the displays 13a and 13b are the same, the coordinates in each terminal are M dots in the X direction and N dots in the Y direction, the origin is the upper left of the screen of each terminal, and the end point is the lower right of the screen. There is.

The operation of the notification means 17 at this time will be described with reference to FIGS. 3 and 4. FIG. 3 is a data configuration diagram of the input information data output from the notification means 17, the input information data 30 is information obtained by processing the information input from the input device 15 by the notification means 17, and the data 30 is virtually input. Output to the means 18a and 18b, and the virtual input means 18
a, 18b processes the application software 19a, 19b into the same form as the information acquired from the actual input device and outputs the processed information.
9b is the same as when the own terminal is provided with the input device.

In FIG. 3, reference numeral 30a denotes a device type code for distinguishing these devices when the input device is composed of a plurality of devices, for example, a mouse, a keyboard, a switch, etc., and 30b denotes the same device. A data type indicating which data is shown when two or more types of information (for example, a mouse button code and X, Y coordinates) are included, and which data is included at the same time, 3
0c is button state data consisting of a code 30c1 of the button or key and a flag 30c2 indicating the timing of the state change when the button or key is pressed or released, and 30d and 30e are devices in which the input device involves coordinate input. In this case, it is X, Y coordinate data indicating the coordinates. However, the horizontal coordinate X in this case is the actual horizontal coordinate on the display screen coordinate of each terminal (see FIG. 2, hereinafter referred to as X coordinate).

Next, according to the flow chart of FIG.
The notification processing of the input information performed by the notification means 17 will be described. First, in step S1, the notification means 17 determines that the input device 1
Input from the mouse, which is the relative coordinate input device 5
Reading via / F16, virtual horizontal coordinate (X * coordinate)
And the amount of movement on the vertical coordinate (Y coordinate) is read. If there is no mouse coordinate movement at this time, input information data 3
If the data type 30b of 0 is used only as a button, the process jumps from step S2 to step S14, and if there is coordinate movement, the process proceeds to step S3, and the movement amount of the horizontal coordinate read this time is added to the previously input and stored X * coordinate. to add. This value is greater than or equal to the upper limit (L × M) that exceeds the right edge of the terminal screen (step S
4), in step S5, from the X * coordinate, (L ×
Subtract M) to obtain the current X * coordinate. If the added value is smaller than the lower limit value (0) in step S6,
The value obtained by adding (L × M) to the X * coordinate in step S7 is set as the current X * coordinate.

As described above, by processing the virtual horizontal coordinates, the cursor display due to the movement of the horizontal coordinates of the mouse can be treated so as to continuously move with respect to the screen of each terminal, and the screen of the rightmost terminal is displayed. When moving from the right to the right, the cursor display moves to the leftmost terminal, and conversely, when moving from the screen of the leftmost terminal to the left, the cursor display can be displayed to the rightmost terminal. Next, from the coordinates (X *, Y) calculated in this way, the terminal address for displaying the cursor is calculated and obtained. This calculation is performed in step S
If the notification destination terminal number is 1 to L in step 8, the value is obtained by adding 1 to the quotient of (X * ÷ M). The terminal address can be obtained by reading the terminal address corresponding to the terminal number thus obtained from the terminal address table shown in FIG. Next, the actual horizontal coordinate X notified in step S9 is obtained as a remainder of (X * ÷ M).
There is no virtual coordinate for the vertical coordinate Y, and the added numerical value may be obtained as the coordinate value.

In step S10, it is checked whether or not the terminal number has changed to a value changed from the previous notification processing, and if it has been changed, processing for deleting the cursor display on the previous terminal is performed. That is, if the previous time is the own terminal (the specific terminal having the input device 15 and performing the notification processing of the input information by the notifying means 17) in step S11, the cursor is moved to the virtual input means 18a of the own terminal in step S12. Outputs a signal to erase the display. This signal is
Specifically, the input information data 30 as shown in FIG.
Is used to output the data in which the coordinate position (X, Y) is set to (0, N-1). By doing so, the application software 19a moves the cursor display to the lower left corner of the screen, and it appears that the cursor display is erased from the screen.

If the previous terminal number is another terminal, the notification means 17 sends the input information data 3 in step S13.
0 is set as the cursor display erasing data together with the terminal address corresponding to the previous terminal number and sent from the communication means 20a to the receiving means 21 through the network 14 and the communication means 20b, and the application software 18b of this terminal is set. Receives this data from the receiving means 21, moves the cursor display to the lower left corner of the screen, and erases it.

At this time, the communication means 20a outputs the input information data 30 together with the terminal address to the network 14, and the communication means 20b of the terminal corresponding to this terminal address reads this data from the network 14 and receives it. The input information data 30 is delivered to the terminal of the other party through the procedure of outputting to the terminal 21.

Finally, as described above, step S8
Then, the data of the input information data 30 is set in the notification destination terminal of each terminal obtained in step S9 and steps S14 to S1.
In step 6, the relevant terminal is notified. If the notification destination terminal is the self-terminal at step S14, the notification means 17 proceeds to step S15.
Then, the data of the input information data 30 is set and output to the virtual input means 18a of the own terminal (step S15), and if the notified terminal is another terminal, the data of the input information data 30 is notified to the communication means 20a. Set with the terminal address of the network 1 in the same manner as in step S13.
4. Send to the receiving means 21 through the communication means 20b (step S16). Receiving means 2 provided in the notification destination terminal
1 outputs this input information data 30 to the virtual input means 18b of the terminal. However, if the coordinates have not moved in step S2, only mouse button information is set in the input information data 30 and notified in steps S15 and S16. In this way, the application software 19a, 19b of each terminal can receive this data and operate the cursor display on the screens of the displays 13a, 13b as if a mouse was provided on its own terminal.

This notification processing is cyclically activated in a cycle of several tens of times per second, and with the movement of the mouse,
Make the cursor display follow. In addition, in order to improve the followability of the cursor display for this mouse movement,
The buffer used when the notification means 17 outputs the data to the communication means 20a is limited to the minimum size, that is, the size of one record of the input information data 30.

As described above, according to the first embodiment, the input information of the input device 15 is once input as digital data, and this data is sent to a predetermined terminal using the network 14 connecting a plurality of terminals. Since the data is output to the virtual input means 18b of the terminal indicated by the address, when switching the terminal address of the notification destination, chattering unlike the switching device by the hardware of the conventional monitoring control system does not occur, and the input device 15 can be shared and used by a plurality of terminals.

Further, the input device 15 provided commonly to each terminal
As such, a relative coordinate input device such as a mouse is used so that the cursor display can be moved between the screens of the respective terminals, and each terminal can be treated as if it were operating the mouse of its own terminal. The switching is smooth, and there is an effect that it is easy to operate.

Further, the application software 19a, 1
Since virtual input means 18a and 18b are provided for the input processing of 9b to eliminate the difference from the input processing from the original input device, the application software can be used as it is.

The difference between the terminal having the input device 15 and the terminal not having the input device 15 is notified by the notifying means 17 and the receiving means 21.
Therefore, the software and hardware of each terminal can be configured in almost the same manner, which has the effect of facilitating production.

Further, since the cursor display of the original terminal is erased before the notification destination of the terminal is switched, the cursor is displayed so that unnecessary cursor display does not remain on the screen and flows between the screens of the respective terminals. Can be displayed.

Further, in response to the operation of the mouse, the cursor display is moved to the right from the terminal at the right end, and when the mouse is further moved to the right, the cursor display is moved to the terminal at the left end, and vice versa. Move the mouse to the left from the leftmost terminal, and move the mouse to the left to move the cursor display to the rightmost terminal, so between the multiple terminals, the cursor moves from the right edge to the left and from the left edge to the right. This has the effect of enabling quick movement.

Further, the buffer used when the notification means 17 outputs to the communication means 20a has the minimum size.
Also for the terminal via the communication means 20a, 20b, there is an effect that the responsiveness of the cursor display on the screen can be improved with respect to the coordinate operation of the coordinate input device such as the mouse.

In the first embodiment, the mouse has been described as an example of the relative coordinate input device, but the same effect can be obtained by using a trackball or a pointing stick.

Example 2. FIG. 6 is a conceptual diagram showing a supervisory control system according to a second embodiment of the present invention. Instead of the relative coordinate input device, which is the input device 15 used in the first embodiment, a tablet for inputting absolute position coordinates. It uses an absolute coordinate input device such as. In FIG. 6, the absolute coordinate input device is made to correspond to the screens of the L terminals and is made to correspond to the virtual horizontal coordinates, and the coordinate position on the tablet is made to correspond to this. When the tablet is operated, this input can be read directly as the virtual horizontal coordinate X * and the vertical coordinate Y, unlike the relative coordinate input. The terminal can be switched by performing the same processing as that of the first embodiment on this coordinate.

According to the second embodiment, the same effect as that of the first embodiment can be obtained for an absolute coordinate input device such as a tablet. As the absolute coordinate input device, there is an input device such as a touch panel other than the tablet, and the same effect can be obtained.

Example 3. The monitoring control system according to the third embodiment of the present invention is provided with the coordinate input device and the keyboard shown in the first or second embodiment as the input device 15. In FIG. 7, the input information data 30 shown in FIG. 3 of the first embodiment is provided with key code input information data 30 having a similar data structure for the keyboard. In FIG. 7, 30a is a device type code indicating a keyboard, 30f is key information generated for a keyboard that has been operated and changed in state, and includes key code 30f1 and a flag 30f2 indicating whether the key is pressed or released. is there.

The operation of the keyboard can be handled in the same manner as the push button of the mouse shown in the first embodiment so that the input information of the keyboard is input to the terminal to which the input information is notified switched by the coordinate input device. Configure. Therefore, according to the third embodiment, a keyboard can be commonly provided for a plurality of terminals, and the operation contents of the keyboard can be provided to the terminal in which the cursor display of the coordinate input device provided together is displayed on the display. Can be output.

Example 4. 8 is a block diagram of a supervisory control system showing Embodiment 4 of the present invention. In FIG.
51 is a keyboard, 152 is a mouse which is a relative coordinate input device, 153 is a switching button for switching terminals,
These are all the controller 12a as the input device 15.
It is connected to the. Each input device 15 is provided with a separate input I / F 16 in the controller 12a, 161 is a keyboard I / F, 162 is a mouse I / F, and 163 is a switch button I / F. Other reference numerals that are the same as those shown in the first embodiment indicate the same or the same. Also,
Although other terminals are omitted from FIG. 8, it is assumed that a plurality of terminals are connected via the network 14 as shown in FIG.

In the fourth embodiment, by pressing the switching button 153, the terminal address for outputting the input information of the input device 15 provided in common to a plurality of terminals, that is, the keyboard 151 and the mouse 152 is switched. Thus, the operator can switch the input device 15 to another terminal and use it by simply pressing the switching button 153. FIG. 9 is a flowchart showing this processing. First, in step S21, the notifying means 17 sends the contents of the input device 15 via the input I / F 16 to the respective input devices 15, namely the keyboard 151, the mouse 152 and the switching. The input information of the button 153 is read.

Next, the notifying means 17 checks the information of the switching button in this input information in step S22, and determines whether or not a key has been newly pressed from the previous time. When this switch button is pressed, the notification means 17 increments the notified terminal number stored in the internal storage device by 1 (step S23). If this value becomes larger than the number L of terminals sharing the input device 15 (step S24), the notification destination terminal number is returned to 1 in step S25. By reading the terminal address corresponding to this terminal number from the terminal address table of FIG. 6 as in the first embodiment, the terminal address can be obtained.

Since the notification destination terminals are switched in this way,
In order to erase the cursor display from the terminal before switching, a signal for deleting the cursor display is sent to the terminal before switching. The processing of steps S26 to S28 is step S11 in the flowchart of FIG. 4 for explaining the first embodiment.
Since the processing is the same as that of S13 to S13, the description is omitted.

Finally, the data of the input information data 30 (according to FIGS. 3 and 7) is set, and step S29 is performed.
In step S31, the relevant terminal is notified. That is, the notification means 17
If the notification destination terminal is the own terminal in step S29, the keyboard 151, mouse 152, and switch button 1 which are the input device 15 are added to the virtual input means 18a of the own terminal in step S30.
Data read from 53 (data of step S22)
Is set to the data of the input information data 30 and is output, and if the notification destination terminal is another terminal, the data of the input information data 30 is similarly set to the communication means 20a, and through the network 14 and the communication means 20b, It is sent to the receiving means 21 (step S31). The receiving means provided in the notified terminal outputs the input information data 30 to the virtual input means 18b of the terminal.

In this way, the application software 19a, 19b of each terminal receives this data,
The notification destination terminal of the input device 15 is the display 13a, which is as if a keyboard and a mouse were provided in its own terminal.
The cursor display on the screen of 13b can be operated. However, unlike the case of the first embodiment, the coordinate input data of the mouse is not processed by the notification means 17. Therefore,
The absolute coordinate position due to the relative coordinate movement by the mouse is calculated by the application software 19a, 19b.

As described above, according to the fourth embodiment, since the notification destination terminal of the input device 15 can be switched by the switching button, the application 19 on each terminal side of the selection destination is selected.
A and 19b can recognize and occupy the input device as the input device of their own terminal.

A keyboard 15 is used as the input device 15.
Although the case where the mouse 1, the mouse 152, and the switching button 153 are used has been described as an example, the same applies to the case where an arbitrary input device such as a touch panel or a tablet is used and a switch corresponding to the switching button is provided. It can be configured and the same effect is obtained. Of course, this switch button may use a specific key provided on a keyboard, a mouse, a tablet, or the like.
It is also possible to assign a button to each terminal and press the corresponding button so that it can be used as the input device of the corresponding terminal.

[0056]

Since the present invention is constructed as described above, it has the following effects.

According to the supervisory control system of claim 1 of the present invention, the notification means provided in the controller of the specific terminal takes in the input information as digital data from the input device provided in this terminal, and inputs this information. When the terminal address for outputting information is calculated, if this terminal address indicates its own terminal, the data is output to the virtual input means of the own terminal, and if the above terminal address indicates another terminal, that terminal's Since the data is output to the virtual input means of the terminal via the communication means for performing data communication between the controllers, a hardware switching device accompanied by chattering at the time of switching is not required, and the input device can be connected to a plurality of terminals. There is an effect that it can be shared and used in.

According to the second aspect of the present invention, the supervisory control system has a relative coordinate input device for inputting a relative coordinate movement amount as an input device, and notifies a specific terminal provided with the input device. Since the means calculates the terminal address from the movement amount of the coordinates and outputs the input information input from the input device to the virtual input means of the terminal indicated by the terminal address as data, the switching of the input device is smooth. The effect is that it is easy to operate.

According to the supervisory control system of claim 3 of the present invention, an absolute coordinate input device for inputting an absolute coordinate position is provided as an input device, and the notification means of a specific terminal provided with the input device is provided. Since the terminal address is calculated from the coordinate position and the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address, the switching of the input device is smooth and easy to operate. There is an effect.

According to the monitoring control system of the fourth aspect of the present invention, the notifying means of a specific terminal having a coordinate input device for inputting coordinates as an input device and a keyboard is provided. , The terminal address is calculated from the above coordinates, and the input information input from the keyboard is output as data to the virtual input means of the terminal indicated by the terminal address, so that the keyboard can be used in common for multiple terminals. The operation content of the keyboard can be output to the terminal of the selection destination indicated by the cursor display of the coordinate input device provided in.

According to the fifth aspect of the supervisory control system of the present invention, the terminal changeover switch is provided as an input device,
The notification means of the specific terminal provided with the input device calculates the terminal address by the switching signal of the terminal switch,
Since the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address,
The application software on the selected terminal side can recognize and occupy the input device as the input device of its own terminal.

According to the sixth aspect of the supervisory control system of the present invention, the display of each terminal has a cursor display indicating the coordinate position input from the coordinate input device, and a specific display device provided with this coordinate input device is provided. The notification means of the terminal outputs coordinate information corresponding to the position of the cursor display to a predetermined terminal indicated by the terminal address, and when the terminal address is switched to another terminal address, the original terminal address is Since the signal for erasing the cursor display from the display of this terminal is sent to the terminal shown, unnecessary cursor display does not remain on the display screen.

According to the supervisory control system of the seventh aspect of the present invention, the communication means has a communication buffer in order to send the input information from the notification means of the specific terminal provided with the input device to another terminal. By reducing the storage capacity of the communication buffer, the input information sent from the notification means to another terminal is immediately sent out, so that the responsiveness of the cursor display on the screen can be improved. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a supervisory control system showing a first embodiment of the present invention.

FIG. 2 is a conceptual diagram illustrating virtual coordinates on a display screen of the supervisory control system according to the first embodiment of the present invention.

FIG. 3 is a data structure diagram of input information data of the monitoring control system according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating the operation of the notification means of the supervisory control system according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a terminal address table of the supervisory control system according to the first embodiment of the present invention.

FIG. 6 is a conceptual diagram illustrating virtual coordinates on the display screen of the supervisory control system according to the second embodiment of the present invention.

FIG. 7 is a data structure diagram of input information data of the supervisory control system showing Embodiment 3 of the present invention.

FIG. 8 is a configuration diagram of a supervisory control system showing a fourth embodiment of the present invention.

FIG. 9 is a flow chart for explaining the operation of the notification means of the supervisory control system showing Embodiment 4 of the present invention.

FIG. 10 is a block diagram showing a conventional monitoring control system.

[Explanation of symbols]

12a, 12b controller 13 display 14 network 15 input device 17 notification means 18a, 18b virtual input means 20a, 20b communication means 21 receiving means 151 keyboard 153 switch button

Claims (7)

[Claims] 1. In a supervisory control system for supervising and controlling by a plurality of terminals having a controller and a display, a communication means for performing data communication between controllers of each terminal, and a controller of a specific terminal among these terminals is connected. An input device, which is provided in the above-mentioned specific terminal, calculates a terminal address for outputting the input information input from the above-mentioned input device, and outputs the data to the virtual input means of the own terminal when this terminal address indicates the own terminal. However, when the terminal address indicates another terminal, a notification means for outputting data to the terminal via the communication means, and a terminal other than the specific terminal are provided, and the notification means passes through the communication means. Monitoring control system characterized by comprising a receiving means for outputting the input information received by the terminal to the virtual input means of the terminal. Stem. 2. A relative coordinate input device for inputting a relative coordinate movement amount as an input device, and a notification means of a specific terminal provided with the input device calculates a terminal address from the coordinate movement amount. The supervisory control system according to claim 1, wherein the input information input from the input device is output as data to the virtual input means of the terminal indicated by the terminal address. 3. An absolute coordinate input device for inputting an absolute coordinate position as an input device, wherein a notifying means of a specific terminal provided with the input device calculates a terminal address from the coordinate position and the terminal 2. The monitoring control system according to claim 1, wherein the input information input from the input device is output as data to the virtual input means of the terminal indicated by the address. 4. A coordinate input device for inputting coordinates as an input device, and a keyboard, and a notifying means of a specific terminal provided with these input devices calculates a terminal address from the coordinates and outputs the terminal address. 2. The supervisory control system according to claim 1, wherein the input information input from the keyboard is output as data to the virtual input means of the terminal indicated by. 5. A terminal changeover switch as an input device, the notifying means of a specific terminal provided with the input device calculates a terminal address according to a switching signal of the terminal switch, and a virtual terminal indicated by the terminal address. 2. The monitoring control system according to claim 1, wherein the input information input from the input device is output to the input means as data. 6. The display of each terminal has a cursor display indicating the coordinate position input from the coordinate input device, and the notifying means of the specific terminal provided with this coordinate input device is a predetermined terminal indicated by the terminal address. With respect to the coordinate information corresponding to the position of the cursor display is output as data, when the terminal address is switched to another terminal address,
The monitor control according to any one of claims 1 to 5, wherein a signal for turning off the cursor display from the display of the terminal is sent to the terminal indicated by the original terminal address. system. 7. An input sent from the notification means to another terminal, which has a communication buffer in order to output the input information to the other terminal from the notification means of the specific terminal provided with the input device. The supervisory control system according to any one of claims 1 to 6, wherein the storage capacity of the communication buffer is made small so that information can be immediately sent out.