JPH0619282B2 - Image display controller - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for displaying various image blocks such as figures, graphs, numbers and characters at arbitrary coordinate positions on a screen such as a CRT and a plasma display. In particular, the present invention relates to an image display device capable of quickly and easily changing the display of all or part of each image block according to data sent from an external circuit.

(Prior Art) Such an image display device is usually connected to a host computer online to monitor, for example, an operating state of a plant including tanks, pipes, valves, etc., and a progress status of a process in a machine factory. It is used as a display terminal to do so (see, for example, Japanese Patent Publication No. 52-6130).

In this case, the monitoring data from the instrumentation system such as the tank level meter and the limit switch for detecting the opening / closing of the valve is once sent to the host computer. The host computer is
The monitor data is processed according to a preset procedure, a control command for changing the image is created, and the control command is sent to the image display device.

As a result, the image drawn on the image display device is changed according to the change in the monitoring data.

(Problems to be Solved) The conventional image display device has only a function of changing the display of a predetermined image block on the screen in accordance with a control command from the host computer. Must be done on a computer. However, in order to sequentially change a large number of image blocks on the screen, it is necessary to create a complicated control command for each image block to be changed.

For example, even in the case of performing a very simple display change such as switching the display color of the valve to display the open / closed state of the valve drawn at a predetermined position on the screen as shown in FIG. It is necessary to create a complicated control command file including a code for specifying the display position and color of the valve, a file number for calling the graphic data of the valve set in the image display device, various command codes, and the like.

Therefore, the user has to be proficient in creating a program using a large number of control commands, and there is a problem that the burden for that is great.

An object of the present invention is to provide the image display device with high-level judgment and processing functions regarding display changes, so that the host computer simply converts the monitoring data sent from the instrumentation system into binary communication data. Image display control that can change the display of the image block automatically according to the binary data (state information MD) sent from the host computer, as long as it has a simple function of transmitting only It is to provide a device.

(Means for Solving the Problems) As shown in FIG. 1, the image display control apparatus according to the present invention includes: a) a graphic data storage means for storing graphic data GD for drawing each image block on a screen ( 6), b) state information storage means (61) in which the state information MD should be stored as an array of binary data, and c) event code TN for identifying an image block to be subjected to display change, the image Address data A representing the storage location in the status information storage means of the status information corresponding to the block
D, a file code FN for calling the graphic data corresponding to the image block from the graphic data storage means, and status information MD for the image block.
The display change processing word W including the display change data ZD preset according to the value and the coordinate data HD representing the display position of the image block on the screen is stored for each image block to be subjected to the display change. Event data storage means (6
2) and c) An image to be displayed-changed based on the state information while deciphering the display change processing word W in the event data storage means and reading out predetermined state information from the state information storage means. The system control means (63) is configured to execute a display change procedure for the graphic data of the block and generate a graphic control signal for the image display section (64).

(Operation) In the event data storage means, the display change processing word W is registered in advance for each image block to be subjected to display change. still,
The procedure for registering the display change processing word W in the event data storage means can be easily performed interactively as described later.

The state information MD sent from the external circuit is sequentially written into a predetermined address of the state information storage means to obtain the state information MD.
The value of changes with time.

The system control means sequentially reads the display change processing word W stored in the event data storage means, decodes the read display change processing word, and executes the following procedure.

Based on the address data AD included in the display change processing word, the state information MD corresponding to the address data is read from the state information storage means, and the graphic based on the file code FN included in the display change processing word. Corresponding graphic data GD from the data storage means
Call.

At this time, the system control means defines the drawing position of the graphic data GD based on the coordinate data HD included in the display change processing word W. Also, the status information MD
The meaning of the display change data ZD included in the display change processing word W is interpreted according to the value ("0" or "1"), and the display change processing is performed on the graphic data GD based on this.

As a result, the graphic control signal generated by the system control means is supplied to the image display unit, whereby the display of a predetermined image block on the screen is changed in whole or in part.

The event code TN included in the display change processing word W is
It can be displayed at a position near the image block to be changed in display as needed.

The system control means repeatedly reads the state information MD set in the state information storage means, constantly monitors the value of the state information, and stores the event data when the state information MD at any address changes. Address data AD representing the storage location of changed status information by searching the means
The display change processing similar to the above is also possible by calling the display change processing word W including the word and decoding it.

(Effect of the Invention) In the image display control device according to the present invention, it is possible to automatically change the display of a predetermined image block in accordance with the binary data (state information MD) representing the contents of the display change. Since it is possible, the host computer may be provided with a simple function of simply arranging the monitoring data sent from the instrumentation system in the binary state information MD and outputting the same. Is unnecessary. Therefore, the burden on the user is significantly reduced as compared with the conventional case.

Further, when the content of the display change processing word W once registered in the event data storage means is modified, the event code TN corresponding to the image data to be modified is used as a keyword,
Since you can search all display change processing words,
The correction procedure is extremely easy.

(Examples) The examples are for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope.

An embodiment of an image display control device according to the present invention will be described in detail below with reference to the drawings. Although the image display control device also has a function as a conventional general graphic display device, illustration and description of these well-known configurations are omitted.

The image display control device (1) is connected to the host computer (2) online as shown in FIG. 2, and the communication controller (13) and the keyboard (12) for receiving data from the host computer (2). I / O controller (14) for taking in input signals from CPU, CPU (15), system program for executing the drawing mode and operation mode described later
ROM (4) in which (Figs. 9 and 10) and the like are registered, various RAMs (41) (42) (43) (44) described later, and for controlling the data read timing by the communication controller (13) The register (3) and the graphic controller (5) for controlling the drawing operation of the display (11).

Of the four RAMs, the state information RAM (41) corresponds to the state information storage means, the event RAM (42) corresponds to the event data storage means, and the graphic RAM (43) corresponds to the graphic data storage means. Further, the system program stored in the ROM (4) corresponds to the system control means. The operation of these RAMs will be described later.

The video RAM (44) is used to develop the data of the graphic RAM (43) into an image on the screen when the drawing operation of the display (11) is controlled by the graphic controller (5).

On the other hand, the host computer (2) is a general digital computer or programmable controller,
Input circuit for receiving monitoring data from instrumentation system (21)
And a processing circuit (22) for storing the received monitoring data in a memory according to a predetermined procedure, an image display control device (22) together with a strobe signal SR and a start signal ST (to be described later) by reading data from the processing circuit (22). It is composed of an output circuit (23) for sending to 1).

FIG. 3 shows the correspondence relationship between the address space of the state information storage memory (24) provided in the host computer and the address space of the state information RAM (41) of the image display control device. Also, as shown in the figure, an 8-bit storage section composed of 0th bit to 7th bit is provided only for necessary addresses (0th address to Nth address).

The monitoring data supplied to the host computer (2) is "0" according to the procedure preset in the processing circuit (22).
After being converted into binary data (state information MD) of "1", the 0th bit of the 0th address, the 1st bit of the 0th address, ..., The 0th bit of the 1st address are stored in the memory (24). , ... are stored in that order.

When one cycle of monitoring data from the instrumentation system is stored in the memory (24) of the processing circuit, the data in the memory (24) is transmitted to the image display control device (1) by the operation of the output circuit (23). It is stored in the state information RAM (41) via the communication controller (13). At this time, the memory of the host computer (24)
Stored data is the status information RAM (4
It is moved to the storage location indicated by the same bit and address in 1), and the read and write operations are controlled so that the contents of both memories are the same.

FIG. 4 shows the structure of the display change processing word W stored in the event RAM (42). The structure of the display change processing word W when changing the display color of the valve will be specifically described below with reference to FIGS. 5 to 7.

The screen in Fig. 5 shows the tank (7), piping (71) and valve (72).
Is composed of three display blocks. Tank (7)
The piping 71 is created as a fixed image of the display 11 as shown in FIG. 6, and its graphic data is stored in the graphic RAM 43 together with the file number F1 (for example, 1). Further, the valve (72) is formed as a separate image block which can be called relatively to the fixed image, as shown in FIG.
It is registered with the file number F2 (for example, 700).

When the display change processing word W is registered in the event RAM (42) of FIG. 4, the apparatus is set to the drawing mode and the keyboard (1
The registration procedure shown in FIG. 9 is performed by the operation of 2).

By setting the file number F1 (here, number 1) of the fixed image by the key, the file number is stored in the address 0 of the event RAM (42) shown in FIG.

Next, the address A in the status information RAM (41) for storing the status information (for example, "1") for calling the fixed image in FIG.
By setting 1 and bit address B1 (for example, A1 = 0, B1 = 0), these data are stored in the first and second addresses of the event RAM (42), respectively.

Further, ON indicating whether the fixed image is called when the bit of the state information stored in the address A1 and the bit address B1 of the state information RAM (41) is ON ("1") or OFF ("0"). / OFF data S (for example, "1") is set. The data is stored at the third address of the event RAM (42).

Next, distinguish the type of image block (event) to be changed in display, that is, whether it is the display of a mark such as a valve, the display of a library with a configuration more complicated than the mark, or the time display. Data (for example, “1” for mark display) is set. The data is the fourth in the event RAM (42).
It is stored in the address.

When the event name TN "valve" is displayed near the valve (72) as shown in FIG. 5, after inputting the display start position of the event name on the screen, key in "valve".
These data are stored in the fifth and sixth addresses of the event RAM (42).

Next, the address A2 and the bit address B2 (for example, A2 = 0, B2 = 1) in the status information RAM (41) for setting the status information for changing the display color of the image block of the valve in FIG. 7 are set. These data are transferred to the event RAM (42).
It is stored in the 7th address and the 8th address, respectively.

Further, the registration file number F2 of the valve image block
By key-setting (here, number 700), the file number is stored in the ninth address of the event RAM (42).

After that, when the status information of the address A2 and the bit address B2 is ON (“1”) and OFF (“0”), the marks are respectively displayed.
Key-in the ON / OFF color information ZD that indicates how many colors the (valve) should be applied to. For example, when it is ON, the red designation key is operated, and when it is OFF, the green designation key is operated. The ON
The / OFF information ZD is stored in the event RAM (42) at the 10th address.

Finally, coordinate data HD (X and Y shown in FIG. 5) indicating the display position of the mark (bulb) on the screen is input. The coordinate data is stored in the 11th address of the event RAM (42).

By repeating the above procedure for creating the display change processing word W for all the events for which the display change should be performed, the event R
Registration of AM (42) is completed.

The above procedure can be easily performed by the interactive mode of the display (11) and the user's key operation.

Next, the image display control device (1) is installed in the host computer.
Regarding the operation in the operation mode connected to (2),
It will be described with reference to the drawings.

When the apparatus is powered on, it is first determined whether or not it is online with the host computer, and if NO, the drawing mode is set. In the case of YES, the data communication process from the host computer (2) to the image display control device (1) is performed, and the state information MD is written in the state information RAM (41).

Next, the contents of a large number of display change processing words W stored in the event RAM (42) are sequentially read, and the following procedure is executed.

First, based on the screen call address A1 and the screen call bit B1 included in the read display change processing word W, the value of the state information MD stored in the address (A1, B1) of the state information RAM (41) is read, The read value and the screen call ON / OFF data S included in the display change processing word
Compare with the value of. If they do not match, it is determined that the host computer (2) has not instructed the display change, and the process returns to the data communication process.

When the state information MD and the ON / OFF data S match, the file number F included in the display change processing word W
Based on 1, the fixed image is called from the graphic RAM (43).

Next, the mode is branched according to the type of event included in the display change processing word W, and the processing is advanced for each mode. For example, in the case of displaying a mark (valve), based on the event name start position and the event name TN included in the display change processing word, the event name TN is displayed at the screen position specified by the event name start position.
Draw (“valve”).

Then, based on the event display calling address A2 and the event display calling bit B2 included in the display change processing word W, the status information data MD is read from the address (A2, B2) of the status information RAM (41), and the read data is read. It is determined whether the MD value is "ON" or "OFF".

If the determination result is "ON", the display change processing word W
The image block (valve) registered in the graphic RAM (43) based on the registration file number F2 included in
Of the graphic data of, and the color (red) when the ON / OFF color information is “ON” at the screen position designated by the coordinate data HD included in the display change processing word W,
Display image blocks (valves). In addition, the judgment result is "O
FF ", the graphic data of the image block (valve) registered in the graphic RAM (43) is read out based on the registration file number F2 included in the display change processing word, and the display change processing word is further read. At the screen position designated by the coordinate data HD included in W, the image block (bulb) is displayed in the color (green) when the ON / OFF color information is “OFF”.

Then, the process returns to the data communication process, and the display change based on the next display change process word W is continued.

By the above procedure, the screen of the display (11) changes every moment according to the data sent from the host computer (2).

In the image display control device (1), a program for the host computer (2) to convert the monitoring data from the instrumentation system into status information and store it in the memory (24) shown in FIG. However, since most of the program is a process of moving the monitoring data as it is to the predetermined address of the memory (24) as the status information, the program creation is extremely easy.

In the image display control device (1), since the event name TN is written in the event RAM (42) shown in FIG. )
When it is desired to correct the registration of the event, the event RAM (42) can be cross-searched using the event name as a keyword. The results are compiled into a chart such as Figure 8,
It is output. Therefore, the user can easily rewrite the event RAM (42) while referring to this chart, which is convenient.

Next, a transmission / reception system between the image display control device (1) and the host computer (2) shown in FIG. 2 will be described.

When the host computer (2) is a well-known programmable controller, the input circuit (2
1), the processing circuit (22), and the output circuit (23) are, as shown in FIGS. 13 (a) and 14 (a), an input processing IP for receiving the monitoring data from the instrumentation system, and the monitoring data. Predetermined program processing PP and output processing OP for outputting processing results
And are cyclically repeated at a constant cycle.

In the conventional transmission / reception system between the image display device and the programmable controller, the programmable controller is
Output data MD by output processing OP as shown in FIG. 14 (b)
Is maintained for a period (2T) that is twice the period T, and this is repeated in a period of 2T. Further, the programmable controller, together with the output data, a strobe signal SR for synchronizing data reception on the image display device side, and a series of data.
Start signal S for designating the start point of (D ₁ , D ₂ ...)
Output T and. Here, the output data MD is maintained for a period of 2T because the image display device takes in the data MD at the falling edge of the strobe signal SR, and the falling edge and the rising edge of the strobe signal are determined by executing the program process PP. Because it is formed.

On the other hand, the image display device performs the receiving operation in synchronization with the received strobe signal and the start signal, determines that the output state of the data MD is stable at the trailing edge of the strobe signal, and outputs the data at the trailing edge. Take in the MD.

Therefore, the conventional communication method has a problem that the data communication cycle becomes 2T and it takes time to transmit a large amount of data.

Therefore, as shown in FIG. 13, a transmission / reception system capable of performing data communication in a cycle T was developed and adopted in this embodiment.

That is, in the present embodiment, the strobe signal SR, as shown in FIG. 11, is converted into the 2-bit data (D ₁ · D ₂₎ forming the state information MD.
· D ₃ · D ₄ in the same period and change period T in) "H" and "L"
Switch to. Incidentally, the head data D ₁ indicates the address of the state information RAM (41) in which the state information should be stored in the case of the present embodiment.

On the other hand, in the image display control device (1), a predetermined time delay is performed by using the falling and rising of the strobe signal SR as a trigger, and when the delay time Td elapses, the eleventh signal is generated.
The read control signal RS is generated to read the data as shown in FIG. The delay time Td is shorter than the cycle T, starting from the switching time point of "H" and "L" of the strobe signal SR (time point of arrow C in FIG. 11 (b)), and also shown in FIG. 11 (a). minimum time Tmin to the data takes a stable value shown in, is set longer than the words rise time Ton or fall time T _off of the output circuit (23) of said input circuit (21).

The delay time Td is set as a timer in the read timing register (3) shown in FIG.

The specific procedure of the data receiving process will be described below with reference to FIG.

First, it is determined whether or not the image display control device is in the online state, and if NO, a message prompting the setting of the delay time Td is displayed on the screen. After the key-in of Td, the data is set in the read timing register, and the process returns to the judgment as to whether it is online again.

When online, the start signal ST is switched from "L" to "H" and the timer set in the read timing register is started when the strobe signal SR changes.

After that, when the delay time Td is up, the first
A read control signal shown in FIG. 1 (d) is generated to start reading data.

Next, it is judged whether or not the start signal is "H", and YE
In the case of S, the data D ₁ (address) is read, the write start address to the state information RAM (41) is set, and then the procedure returns to the procedure for judging the change of the strobe signal. If the start signal is "L", reads the data _{D 2, D 3, D 4} ( state information), and stores them to the state information RAM (41).

After that, it is determined whether or not the storage in all the addresses of the status information RAM (41) is completed, and in the case of NO, the status information RA
The address of M is incremented and the subsequent data is stored. In the case of YES, after performing the graphic processing based on the state information RAM (41), the event RAM (42) and the graphic RAM (43) shown in FIG. 2 as described above,
Returning to the determination of the switching of the start signal, the process proceeds to the next new image changing process.

According to the above transmission / reception system, not only the data can be updated at the same cycle as the program processing cycle T of the programmable controller for quick communication as shown in FIG. 13, but also shown in FIG. 11 (c). Signal rise time T
_on, or in consideration of the variation in the falling time T _off, since it sets the optimal delay time Td, is the reliable reception processing is ensured.

The transmission / reception method can be applied to serial transmission as well as parallel transmission. Further, it is effective not only as a communication targeting the image display control device (1) as in the present embodiment but also as an information transmission method targeting a general information processing circuit.

The drawings and the description of the above embodiments are for explaining the present invention, and limit the invention described in the claims,
Or it should not be understood as reducing the range.

The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an image display control device according to the present invention, FIG. 2 is a block diagram showing a concrete configuration of the image display control device and a host computer, and FIG. 3 is a host computer. FIG. 4 is an explanatory view showing the correspondence relationship between the memory and the state information RAM, FIG. 4 is a view showing the structure of the display change processing word stored in the event RAM, FIG. 5 is a view showing an example of a display screen, and FIG. Is a diagram showing a fixed image portion constituting the screen, FIG. 7 is a diagram showing image blocks to be changed in display, FIG. 8 is a chart showing a result of cross search with an event name as a keyword, and FIG. 9 is 10 is a flow chart showing the operation in the drawing mode, FIG. 10 is a flow chart showing the operation in the operation mode, FIG. 11 is a timing chart for explaining the data transmitting / receiving system, and FIG. 12 is the data transmitting / receiving operation. Flowchart showing a thirteenth view and FIG. 14 is a timing chart comparing the at data transmission and reception system of the conventional data transmitting and receiving system in this embodiment. (1) …… Image display controller (2) …… Host computer (11) …… Display MD …… Status information

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP 61-28817 (JP, A) JP 61-170615 (JP, A) JP 63-36113 (JP, A)

Claims (1)

[Claims] 1. An image display control device capable of changing the display of an arbitrary image block based on state information MD sent from an external circuit as binary data. Graphic data storage means (6) in which graphic data GD for drawing on the screen is stored together with a file code; and b) status information storage means (61) in which the status information MD should be stored as an array of binary data. And c) an event code TN for identifying an image block whose display is to be changed, and address data A representing the storage position of the state information corresponding to the image block in the state information storage means.
D, a file code FN for calling the graphic data corresponding to the image block from the graphic data storage means, and status information MD for the image block.
The display change processing word W including the display change data ZD preset according to the value and the coordinate data HD representing the display position of the image block on the screen is stored for each image block to be subjected to the display change. Event data storage means (6
2) and c) An image to be subjected to display change based on the state information while deciphering the display change processing word W in the event data storage means and reading out predetermined state information MD from the state information storage means. An image composed of system control means (63) which executes a display change procedure for the graphic data of the block, creates a graphic control signal for the image display unit (64) and sends it to the image display unit (64). Display processor.