JPS59195730A - Data output system - Google Patents

Abstract

PURPOSE:To reduce the load of each computer by collating key information with corresponding key information when each computer receives key information and transmitting prescribed output information to a data output device from the computer if the computer has output information. CONSTITUTION:When a key corresponding to request picture information is depressed in a display device 11, key information is sent to a controller 4 through a controller 3 of a port 21. The controller 4 generates set attention information and sends it to ports 31, 32... through a cable 10. Respective transmission/reception controllers 6 report this information to computers 41, 42... through receiving controllers 7, and attention information is analyzed by the control of display managing processors 8 to discriminate whether picture display information exist or not. If this information exists, a display request is issued to the device 11, and prescribed information is displayed. Meanwhile, the computer which has no display information for attention information in the collation process declares the ineffectiveness, which indicates that the computer has no relation to attention information, to indicate that the computer does not output information.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a computer network system having a plurality of electronic computers (hereinafter simply referred to as computers in this specification), in which a data output device is shared. The present invention relates to a data output method that reduces the load on each computer and allows output information from any computer to be output quickly and with good responsiveness.

[Prior art and its problems]

By the way, in recent process control systems, with the diversification of systems and the spread of information, there has been an increase in the adoption of functionally distributed computer systems (data way systems) in which multiple computers are organically connected. .

In such systems, output information is often located on multiple computers, and a common I10 device is accessed from multiple computers.

For example, when information is displayed (output) on a common display device (including a keyboard and a display, the same applies hereinafter) as one of the I10 devices, it is necessary to manage the output information for the display device.

Conventional display device management methods in such computer network systems include attention information (input key information that corresponds to the type of display device or keyboard and indicates which key on the keyboard was pressed). A method is adopted in which the destination of notifications (including the following) is determined in advance to a specific computer.

That is, attention information corresponding to the keyboard of a certain display device is accepted by a specific computer corresponding to that display device. A specific computer that receives attention information analyzes the attention information, and if it contains key information about display information that exists on other computers, it communicates with other computers via a dataway or line. Data is transmitted between the two, and the display information is once received. Display information is then transferred from this specific computer to the corresponding display device that has issued the attention information.

However, in such an output information management method, if the computer receiving the attention information does not have display information, data is transferred to and from another computer. Particularly in a functionally distributed computer system, this data is transferred frequently. As a result, the responsiveness of sending display information to the display device deteriorates. Moreover, there is a drawback that the load on each computer increases as data transmission processing is performed.

Furthermore, when updating the screen when an event occurs or at regular intervals, it is necessary to manage information about the type of screen currently being displayed and whether it is in a displayable state. Therefore, even when processing information unrelated to display,
It becomes necessary to add information to that effect and notify each computer, which also has the drawback of increasing the load on the computers.

[Purpose of the invention]

This invention was made in view of the drawbacks of the prior art, and aims to eliminate these drawbacks.
The purpose is to provide a data output method that can reduce the load on each computer and output data with quick response.

[Key points of the invention]

In a computer network system having a plurality of computers, when a data output device is shared, each computer has a corresponding key corresponding to the key information of one of the plurality of keys on the keyboard. It has information and corresponding output information, interrupts each computer at the same time with a signal from the keyboard, and compares the key information sent from the keyboard with the corresponding key information held inside each computer. , a match is found, it is determined whether or not there is output information, and the computer that has the output information transfers the predetermined output information to the data output device corresponding to the keyboard.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing a specific embodiment of a data output method when the present invention is applied to a display device as a data output device.

In this embodiment, a plurality of computers 41. 42.・・・
・Display device 11.12. ... is a plurality of boats 21, 22 . ...31,32. ...
They are organically connected in a loop with cables (or lines) 10 through the cables, forming a so-called data way system. Here, a plurality of computers 41, 42.・
... is a function-distributed form, display devices 11, 12
．． It exchanges data with...

Display devices 11, 12. . . . are each integrally equipped with a keyboard 1 and a display 2 as a data output device, and cables 51, 52 .・
It is connected to ports 21, 22°, etc. via...

On the other hand, computers 41, 42. . . . are a display management processor 8 and a display screen management memory 9, respectively.
and via cables 61, 62°...
Port 31.32. ···It is connected to the.

Here, ports 21, 22 . ... includes a controller 3 that plays the role of an interface and a controller 4 that plays the role of transmitting and receiving.
has an attention notification information memo I75.

On the other hand, ports 31, 32 . ... are each equipped with a controller 6 that plays the role of transmitting and receiving, and this controller 6 has an attention receiving controller 7.

Here, display devices 11, 12 . A request to display predetermined screen information to be displayed on any of the displays 2 is made by pressing a key with a corresponding predetermined number on the keyboard 1 of the corresponding display device.

Now, if there is a display request on the display device ff1ll and a key with a predetermined number corresponding to the requested screen information is pressed, the key information corresponding to the pressed predetermined key will be transmitted from the keyboard 1 of the display device 11. The signal is sent to the controller 3 of the port 21 and supplied to the controller 4 via there. When the controller 4 receives this key information, the controller 4 assigns attention information corresponding to the display device 11 (or attention information corresponding to the keyboard 1, hereinafter the same) to the press on the keyboard 1 according to the preset attention notification information memory 5. Attention information for the display device 11 is generated, including the key information. and,
This is connected via cable 10 to port 31. ．． 32.
Send to...

Each port 3'l, 32. ... receives this attention information by its transmission/reception controller 6, and via its attention reception controller 7,
Calculators 41, 42. Notify attention information to ....

Computers 41, 42 that received this information. ... each receives an interrupt individually, analyzes the received attention information under the control of its display management processor 8, and calculates information about the display device (currently the display device 11) indicated by the attention information. The display screen management memory 9 is referred to based on the key information. And information about that display device (type of attention information)
It is checked based on the + key information to determine whether there is screen display information for this.

Here, the display screen management memory 9 of each computer stores, for example, the screen display information owned by that computer.
As shown in FIG. 2, an attention information column 52 in which search items are information about the display device from which the attention information has been sent (type of attention information) + key information.
The storage table 50 includes a storage table 50 having the following information. The storage table 50 also includes a storage column 51 indicating whether the attention information is valid or invalid, a display device number column 53, and a screen data column 54. Note that FIG. 2 is an explanatory diagram showing an example of the storage table 50 stored in the display screen management memory 9. As shown in FIG.

Therefore, the type in the sent attention information and the key information contained therein are checked on this storage table 50, and the screen data column 54 is referred to.
If there is screen data, it is made valid and the flag in the storage column 51 is set to "1". As a result, the corresponding screen display information is read out from the screen data column 54. Here, screen data tlii15
4 has an item field 54a showing screen items on the display and a data field 54b showing display information for the items.

Therefore, in the key information verification process, if a computer, for example, the computer 42, has screen data as screen display information, the computer 42 determines that the attention information is valid, and flags its memory@51. bit'
1'' and the screen data column 54, the computer configures display information as screen information for the key information.Then, under the control of the display management processor 8, screen information is generated from the received attention information. The display device to be sent is determined from the display device number field 53, a display request is made to the display device, and the corresponding screen information is sent.

By the way, in the current case, since the attention information is received from the display device 11, a display request is made to the display device 11. Therefore, the information to be displayed is stored in a predetermined area of the display screen management memory 9, and the display information is transferred.

Display processing is performed as described above, and predetermined information is displayed on the corresponding display device.

On the other hand, in the verification process, for computers that do not have display information in their attention information (calculators 41, . . . (excluding computer 42)), the attention information is used to indicate that the attention information is not related to the own computer. A flag is set to indicate the invalidity of "not being output for display". This is to reset the flag of the memory tlii 151 to "0" for the same item (the item 54a of the screen data 54 is the same) on the screen of the display device corresponding to the attention information, so-called invalid declaration. This is done by

Note that this invalidation declaration corresponds to the screen item of the display device indicated by the attention information, so it is made for the corresponding screen information, and means that it is not being output.

The operations of the display device 11 and each computer as described above are similar to those of the other display devices 12. The same applies to... Therefore, descriptions of these display devices will be omitted.

Next, the overall operation of the output method shown in FIG. 1 will be explained in relation to other display devices.

1 Now, while the display information is being outputted from the computer 42 to the display device 11 in this way, if there is a request to display another screen information from a certain display device, the number on the keyboard and the other screen information will be pressed in the same way. The attention information including the key information of the selected key is displayed (21, 22.).・・・
31.32.
...receives this. Therefore, each attention receiving controller 7 receives this, interrupts the corresponding computer, and notifies each computer of this. Therefore, the same process as above is performed, and when a match is found in the attention information, the display information is sent from the computer that has the screen display information there to the corresponding display device, and the predetermined screen information is displayed on the display. become.

Such processing is performed in a time-sharing manner, and is performed in parallel with the sending of display information from the computer 42 to the display device 11.

Now, from the display device 11 to which the output information is being sent from the computer 42, the display information on the computer 41 is displayed on the same screen item.
Assume that a new display request is issued and a predetermined key corresponding to the request is pressed. As a result, since the computer 41 has display information data, this becomes valid.

At this time, the computer 4 that is sending display information to the display device 11 in the previous attention information verification
2 also receives new attention information. Therefore, this computer 42 is not effective with the sent attention information because there is no data in the screen information.

As a result, the flag of the corresponding screen item in the storage column 51 in the storage table 50 is reset to "O" as an invalid flag.

This invalid flag (flag bit "0' in memory field 51) has the following effect. In other words, when there is a screen update, it cuts update requests from computers that do not have that information. When each computer 41, 42... receives attention information and displays display data on a specific display device, the flag indicating invalidity is not set when sending the display request. If the flag is referenced and the invalid flag is set, the display process will not be performed.

Therefore, when the computer 42 that previously sent the display information to the display device 11 sends the next display information, it will refer to this flag since it has received the attention information. As a result, since the invalid flag is set, the transfer of the display information is stopped.

Now, in the above system, if the storage table 50 of the display screen management memory 9 is configured so that only one computer is effective for a certain attention information, For information, only one calculation ta exists. By doing this, conflict of display requests with other computers can be avoided.

Note that for computers that do not send display information regarding attention information, a flag indicating invalidity is stored, but as mentioned above, this means that when updating the screen, information only from computers that have a match will be displayed on the same display device. This is a process for sending out the same screen item, and is intended to prevent confusion in transfer information. Therefore, this configuration is not necessarily necessary if the next request or the like is made at the end of the display information transfer and an alternative measure is taken. In short, any method may be used to collate attention information as long as it sends out display information only from computers that have display information, or only accepts display information on the display device side. realizable.

As described above, this embodiment includes a plurality of display devices, but the number of display devices may be one. In this case, the attention information includes information about the display device or information about the keyboard. There is no need to include type information that indicates. Therefore, in this case, the attention information only needs to be the key information. In addition, the memory table in the embodiment is a table for each key information, including key information without screen display information, but this is a table for each key information, but only for those with screen display information, the memory table is compared with the corresponding key information. Any table can be used, simply compare and match the key information, and find the match.
Based on the mismatch, the presence or absence of the screen display information may be determined.

Further, in the embodiment, a display device equipped with a keyboard and a display as a data output device is taken as an example, but it goes without saying that various data output devices such as a data typewriter can be used in place of the display. be.

Furthermore, although the explanation focuses on computers with distributed functions and multiple computers holding various display information,
The invention is not limited to functionally distributed systems.

Further, in the embodiment, an attention information notification memory and an attention information reception controller are provided, but in the present invention, each computer only needs to receive key information corresponding to predetermined screen display information. It is not limited.

By the way, one piece of key information may be key information configured as a set of information on a plurality of input keys, and such information is also referred to as key information here. Furthermore, as long as the key information is converted into other information in response to the corresponding screen display information, and it corresponds to the key information, it is not considered as key information in the present invention. It includes.

〔Effect of the invention〕

As can be understood from the above description, the present invention provides a computer network system having a plurality of computers, in which at least one data output device is shared, each computer can use a plurality of keys on a keyboard. It has corresponding key information corresponding to any one of the key information and output information corresponding to this, and simultaneously interrupts each computer by a signal from the keyboard, and outputs the key information sent from the keyboard and each computer. It is configured so that the computer that has output information sends predetermined output information to the data output device. Even if the information is stored in each computer, there is no need to exchange information between the computers, and the output information can be sent directly from the matching computer that has the display information.

As a result, after making an output request from the data output device,
The response to the output becomes faster and this improves. In addition, unnecessary information transfer between computers is eliminated.
The load on the computer is reduced, and the occupation rate of the computer in the entire system can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a specific embodiment of a data output method when the present invention is applied to a display device as a data output device, and FIG. 2 shows the components of the embodiment shown in FIG. FIG. 2 is an explanatory diagram showing an example of a storage table stored in a display screen management memory, which is one of the display screen management memories. 1- Keyboard 2- Display 3, 4. 6
- Controller 5 - Attention notification information memory 7 - Attention reception controller 8 - Display management processor 9 - Display screen management memory 10, 51. 52. 61. 62- Cable 11.12 - Display device 21.22, 31.32 - Port 41.41 - Computer patent applicant Fuji Electric Manufacturing Co., Ltd. Fuji Facom Control Co., Ltd. Agent Patent attorney Tetsuya Mori Patent attorney Naito Yoshiaki, Patent Attorney, Shimizu, Patent Attorney, Horide, Double Cho 9 Figure 1 1 9 1 2 13 5 2 L, a 62 514 [Riricho-1 21235 Shiki ■-1" 21 0 [ [

Claims (2)

[Claims] (1) A plurality of computers, a data output device, and a keyboard corresponding to the data output device and equipped with a plurality of keys are connected via a board, and information from each of the plurality of computers is output as common data. In the data output method for outputting data to a device, each of the computers is provided with at least corresponding key information corresponding to key information of any one of the plurality of keys and output information corresponding thereto, and the plurality of keys When the key information of any key among them is sent to each of the computers via the boat, each of the computers collates the corresponding key information with this sent key information and calculates the output information. A data output method characterized in that a computer having this output information sends predetermined output information to the data output device. (2) each computer is provided with at least corresponding key information selectively corresponding to one of the key information of the plurality of keys and output information corresponding thereto;
Comparing the corresponding key information with the transmitted key information, determining whether or not there is output information, and only the computer having this output information transmitting predetermined output information to the data output device. A data output method according to claim 1, characterized in that: