JPH06149707A - Display terminal system - Google Patents

Abstract

PURPOSE:To reduce the load on a host system side by eliminating the increase in a screen data memory on the host system side and the oppression of a handling control load. CONSTITUTION:This display terminal system is provided with the screen data.screen handling memory 1 which stores screen data and a program for screen handling, a means which executes the program for screen handling, a means which can down-load the screen data and program for screen handling from the host system 211, and a means which modifies display and specific parts of the screen data and screen handling program in the memory with commands; and processes are performed by following procedures predetermined on a display terminal equipment side to reduce the load on the memory, CPU, etc., on the side of the host system 211.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display terminal system having a display and an input key in the same housing and including a display terminal device connected to a host system by a communication line.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional display terminal system. The display terminal device here is mainly a control unit 201, and a reception data buffer 202, a transmission data buffer 203, a display interface 204, a keyboard interface 205, a system memory 206, a display data memory connected to the control unit 201. The display terminal device 207, the display device 208, the keyboard 209, and the like are connected to the host system 211 via the RS-232C interface 210 by the serial communication line 212. Further, in the system memory 206, information necessary for special control of the display terminal device and each interface 204, 20 such as, for example, line-feeding the screen with a CR code, are added.
Information necessary for setting 5, 210 is stored.

Then, the display data from the host system 211 is taken into the reception buffer 202 via the RS-232C interface 210. It should be noted that the display data fetched into the reception buffer 202 is once stored in order to prevent the display data from being missed when the fetching speed into the reception buffer 202 is faster than the display speed on the display terminal device side. Receive buffer 202
Will be stored in. Further, the display data stored in the reception buffer 202 is compared with the data in the display data memory 207 by the control unit 201, and the contents thereof are converted into data of alphanumeric characters and character characters which can be visually understood by humans. Then, this data is displayed on the display 208 via the display interface 204.

Further, the data input to the display terminal device includes data input by an input key (not shown) on the keyboard 209. Then, the data key-inputted here is code-converted by the keyboard interface 205 and taken into the transmission data buffer 203, and this is transmitted to the host system 211 via the RS-232C interface 210. And the handling control such as screen switching is all done by the host system 2.
It is performed on the 11th side.

That is, in the display terminal system having this configuration, the screen displayed on the display 208 is the host system 2
11 side, the display terminal device side only converts and displays the received data, and when the input from the keyboard 209 is displayed on the display 208, the data is once transmitted to the host system 211 side, and the host again The display data is received from the system 211 side.

[0006]

Therefore, in the above-mentioned conventional display terminal system, the above-mentioned configuration is used when there is only a certain screen and a key operation suitable for it, such as a control terminal on the factory line. If this is attempted, a sequencer or a simple computer will often be used on the host system 211 side. The host system 211 is often restricted in memory, and it is difficult to use a large amount of memory for screen information and screen handling.

For example, FIG. 3 is a block diagram showing an example of the configuration of a conventional display terminal system in a factory line. A display terminal device 301 is connected to a host system 302, and the host system 302 is a host computer 303 and various devices 304. And the like are connected by a communication line 305.

However, in this type of system, in addition to the control of the display terminal device 301, various devices 3
In addition to 04 etc., it is common to carry out many other controls. Therefore, as a memory used for the screen related to the host system 302 side, as shown in a schematic diagram showing the inside of the memory of the host system 302 in FIG. 4, for example, an OS (abbreviation of “operating system”) program 401 And screen handling program 4
02a and other device control program 402b, etc., an application program 402, screen data 403, etc. are required, but if the memory used for screens increases, the memory available for other controls will be squeezed. .

Further, in recent years, the number of screens required for a factory line to cope with high-mix low-volume production is increasing, and the screen handling is becoming complicated accordingly. As a result, there is a problem that screen-related data cannot be stored on the host system 302 side unless the function of other control is deleted.

The present invention has been made in view of the above problems, and an object thereof is to eliminate an increase in the screen data memory on the host system side and an increase in the handling control load.
It is to provide a display terminal system capable of reducing the load on the host system side.

[0011]

To achieve the above object, the present invention comprises a display terminal device having a display and an input key in the same housing and connected to a host system by a communication line. Then, in the display terminal device, a memory for storing the screen data and the screen handling program, a means for executing the screen handling program, and the screen data and the screen handling program from the host system by communication. A means for downloading and a means for displaying the screen data and the screen handling program in the memory and changing the data of a designated portion by a command given by the operation of the input key or the communication are provided.

[0012]

According to this, since the dedicated memory for storing the screen data and the screen handling program on the display terminal device side is provided on the display terminal device side, the display terminal device is made stand-alone and the screen is displayed. The display and change of data can be processed according to a predetermined rule given on the display terminal side, without depending on the control of the host system. As a result, it is possible to reduce the load on the memory, CPU, etc. on the host system side.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration block diagram of a display terminal system showing an embodiment of the present invention. In FIG. 1, the same reference numerals as those in FIG. 2 denote the same parts as those in FIG. The display terminal device according to the present embodiment is roughly composed of a control unit 3 and a reception data buffer 202, a transmission data buffer 203, a display interface 204, a keyboard interface 205 connected to the control unit 3 via a data bus 4. , A system memory 206, a display data memory 207, a screen data / screen handling memory 1, a keyboard input data buffer memory 2, a display (display) 208, a keyboard 209, etc., and this display terminal device is an RS-232C interface 210. It is connected to the host system 211 via the serial communication line 212 via.

More specifically, the control unit 3 makes various settings based on data from the host system, controls input / output of data, performs screen control according to a screen handling program, and displays a screen based on the screen data.

In the system memory 206, for example, CR
Information necessary for special control of the display terminal device, such as a line break on the screen with a code, each interface 204, 205,
Information necessary for setting the part 210 is stored.

The screen data / screen handling memory 1 and the keyboard input data buffer memory 2 are not provided in the above conventional structure. Of these, the screen data / screen handling memory 1 stores the screen display data and each screen. A program for handling is stored,
Keyboard input data buffer memory 2 is keyboard 2
If necessary, the data from 09 can be stacked.

Next, the operation of this display terminal system will be described. First, when the power is turned on and / or reset, the display terminal device starts up in accordance with the screen handling program stored in the screen data / screen handling memory 1 and displays a predetermined screen on the display 208. .

On the other hand, if there is no particular screen handling program at the start-up, the display terminal device waits for control from the host system 211 side as in the case of the conventional system, and a message to that effect is displayed on the screen of the display unit 208. Is done.

If this screen handling program does not exist, the display data from the host system 211 is RS-232C as in the conventional system.
It is captured in the reception buffer 202 via the interface 210. It should be noted that the display data fetched into the reception buffer 202 is once stored in order to prevent the display data from being missed when the fetching speed into the reception buffer 202 is faster than the display speed on the display terminal device side. It is stored in the reception buffer 202. The display data stored in the reception buffer 202 is
The control unit 3 compares the contents in the display data memory 207 with the contents, converts the contents into data of alphanumeric characters or character characters that can be visually understood by human eyes, and then, this data is passed through the display interface 204. Is displayed on the display 208.

Input data is input from the input keys of the keyboard 209, and the data input by this key is code-converted by the keyboard interface 205 and taken into the transmission data buffer 203, which is RS-23.
Host system 2 via 2C interface 210
11 is sent.

On the other hand, when the screen handling program exists in the screen data / screen handling memory 1, the screen handling program 1 is processed in accordance with a predetermined procedure to display the screen.

When the operator operates the keys on the keyboard 209 to give a command after the start-up, the control unit 3 checks whether the data input from the keyboard 209 is an input for handling and sends it to the host system 211. Check whether the data is necessary.

If the data is data for handling, the display screen is switched according to the screen handling program in the screen data / screen handling memory 1. At the same time, if this data is data that needs to be transmitted to the host system 211, whether it is transmitted for each key input, or whether it is once stacked in the keyboard input data buffer memory 2 and is collectively transmitted when all the inputs are completed. Is processed according to the procedure of the screen handling program stored in the screen data / screen handling memory 1 set for each screen.

Further, the screen data and the screen handling program can be downloaded in the format of "data transfer command" + "transfer data" using the line for communicating with the host system 211.
The screen handling memory 1 is stored in the host system 2 by operating the input keys on the keyboard 209 or serial communication.
It is set so that the display and the data change of the designated portion can be performed by the command given from 11.

Therefore, in the display terminal system according to the present embodiment, on the display terminal device side, dedicated screen data / screen handling memory 1 for storing the screen data and the screen handling program, and the screen data / screen handling memory 1 For executing the screen handling program of the host system 21 through communication.
The screen data and screen handling program can be downloaded from 1 and the screen data and the screen handling program in the screen data / screen handling memory 1 can be displayed by the command given by the operation of the input key in the key board 209 or serial communication. Also, since the display terminal device side is made into a stand-alone type by providing a function of changing data of a designated portion, the display and change of screen data are not dependent on the control of the host system 211 as a host system. Processing can be performed according to a predetermined rule given on the display terminal side.

[0026]

As described above, according to the present invention,
Since a dedicated memory for storing the screen data on the display terminal device side and the screen handling program is provided on this display terminal device side, and this display device is made into a stand-alone type, the display and change of the screen data etc. It is possible to expect an effect that it is possible to perform processing according to a predetermined rule given in advance on the display terminal device side without depending on the control of 1. and to reduce the load on the memory, CPU, etc. on the host system side.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a display terminal system showing an embodiment of the present invention.

FIG. 2 is a configuration block diagram showing an example of a conventional display terminal system.

FIG. 3 is a configuration block diagram showing an example of a display terminal system in a conventional factory line.

FIG. 4 is a schematic diagram showing the inside of the memory of the host system.

[Explanation of symbols]

 1 screen data / screen handling memory 2 keyboard input data buffer memory 3 control unit 208 display unit 211 host system

Claims (1)

[Claims] 1. A display terminal system having a display and an input key in the same housing and comprising a display terminal device connected to a host system by a communication line, wherein screen data and screen are provided in the display terminal device. A memory for storing a handling program, a means for executing the screen handling program, a means for downloading the screen data and the screen handling program from the host system by communication, an operation of the input key or the A display terminal system, which is provided with means for displaying the screen data and the screen handling program in the memory and changing the data of a designated portion by a command given by communication.