JPS60552A - Computer and its input-output device - Google Patents

Abstract

PURPOSE:To reduce the number of the core of a cable between a computer and its input-output device by constituting them in such a way that numerous digital data are divided into plural data groups and inputted at a time division. CONSTITUTION:Numerous digital data are divided into plural data groups 10-1- 10-n and inputted into the data group selector 13 and state change of data group detecting circuit 15 of an input-output device 15. When, for example, a change occurs only in an optional data group 10-i, the detecting circuit 15 detects the change and sends out the information 14 to a computer 40 through a transmission cable 9-3. At the computer 40, the information is outputted to a bus line 21 and a CPU1 is made to read the information 14. Thereafter, a group select signal is sent out to the input-output device 50 through a transmission cable 9-3 and the data of the changed digital data group 10-i are selected and outputted to the computer 40. The computer 40 reads the data of the changed digital data group 10-i.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a computer and its input/output device, and particularly to a computer and its input/output device configured to input a large amount of digital data divided into groups. Regarding.

[Technical background of the invention and its problems]

In computer systems that generally have a large number of input points,
It is impractical to constantly capture and monitor individual input points, as this would complicate the system configuration and place an enormous load on the computer.

Therefore, conventionally, as shown in FIG. 1, digital input circuits (hereinafter referred to as DI modules) 4-1 to 4-n having a plurality of input points are provided in the computer 20, and the number of input points (24 points in the figure) is provided. is divided into n groups,
A method of inputting digital data is used. That is, digital data input from the input/output device 30 to the computer 20 is divided into digital data groups 10-1 to 10-n I for each input point of the DI modules 4-1 to 4-n.
c5) and input via transmission cables 9-1 to 9-n1 and connectors 8-1 to 8-n, respectively.

DI module: L-A/4-1 to 4-H are each read from the digital group 10 by the read command from OPUt.
Input circuits 5-1 to 5-n1 that output -1 to 10-n to the pass line 21; digital data groups 10-1 to 5-n1;
A state change detection circuit 6 that detects a change in data of 10-n
-1 to 6-n1 Consisting of interrupt generation circuits 7-1 to 7-n that send interrupt signals to the OPUI based on the output signals of the state change detection circuits 6-1 to 6-n, any digital data group 10 -1 when a change occurs in the data, the state change detection circuit 6-i detects the change and sends an interrupt signal to the CPU 1 via the interrupt light emitting circuit 7-i.

OPUI is an input circuit 5- corresponding to this interrupt signal.
Send a read signal to digital data group 10
-i data is output to the pass line 21, taken in as the latest data to OPUI, stored in AJvi2, and various processing operations are performed.

However, recent process control computers have large processing capabilities and the number of digital data input points is increasing. However, the configuration of the computer becomes complicated, the equipment becomes larger,
There are problems in that it is expensive and reliability is reduced because noise and the like are likely to enter.

[Purpose of the invention]

The present invention was made in view of the above-mentioned problems, and is configured to divide a large amount of digital data into multiple data groups and input them in a time-sharing manner, thereby reducing the number of cable cores between a computer and an input/output device. We have strengthened the computer's noise resistance, improved its reliability, standardized the input circuit, and made it more compact.
The purpose is to provide a computer with improved maintainability and its input/output device.

[Summary of the invention]

In order to achieve the above object, the present invention provides a computer that inputs a large amount of digital data and an input/output device thereof, which divides the large amount of digital data into data groups of the number of stages, inputs the data groups, and selects the data group by a group select signal. a data group selector that selects an arbitrary data group and outputs it as first digital data; and a data group selector that inputs the plurality of data groups and detects changes in the plurality of digital data for each data group to output second digital data. A first state change detection circuit is provided in the BIJ input/output device, and the first state change detection circuit receives the first digital data as input and outputs the input data to the pass line according to a command from the central processing unit (hereinafter referred to as OI). a first input circuit that
a second state change detection circuit that receives the second digital data and detects a change in the input data;
According to the detection signal of the state change detection circuit, 90 Jl' U
An interrupt generation circuit that sends an interrupt signal to the computer and an output circuit that sends the group select signal to the data group selector according to a command from the CPU are installed in the computer to reduce the number of cable core wires between the computer and the input/output device. In addition, the computer and its input/output device have improved noise resistance, improved reliability, standardization and miniaturization, and improved maintainability.

[Embodiments of the invention]

A computer and a 7C input/output device according to the present invention will be explained using an embodiment shown in FIG.

In FIG. 2, the computer 40 is a central processing unit (CPU)
1. IT OM that stores programs 3. RAM that secures the data area necessary for program execution 2.
Input circuit 5-1 that outputs digital data to the pass line 21 in response to a read command from 0PUI, OP U i
Output circuit 12.0 that outputs a group select signal to select a Shibuta group in response to a selection command from PUI; input circuit 5-2 that outputs group data to the pass line 21 in response to a read command from PUI; detects changes in group data; The JOPUI includes a state change detection circuit 6, and an interrupt generation circuit 7, which sends an interrupt signal to JOPUI based on the signal from the state change detection circuit 6.

Further, the input/output device 50 receives digital data groups 10-1 to 10-n whose maximum number of input points per group is determined by the input circuit 5-1, and selects a predetermined digital data group 10 according to a group select signal. A data group selector 13 that selects and outputs -1, and a data group state change detection circuit 15 that detects and outputs data changes for each digital data group 10-1 to 10-n.
and configure it.

The operation of the computer and its input/output device according to the present invention configured as described above will be explained below.

A large number of digital data input from the input/output device 50 to the computer 40 are input to the input circuit 5-
Digital data group 10-1 with 1 input point
~10-n Vc51) and input to the data group selector 13 and data group state change detection circuit 15.

Now, assuming that a change has occurred only in the data of an arbitrary digital data group 10-1, the data group state change detection circuit 15 detects the change and transmits the information 14 that a change has occurred in the data group 10-1. cable 9
-3, and send it to the computer 40 via the connector 8-3.

The machine 40 inputs this change information 14 to the input circuit 5-2 and the state change detection circuit 6, and the state change detection circuit sends an interrupt No. 18 to the OPU1 via the interrupt generation circuit 7. 0PUI issues a read command to the input circuit 5-2 in response to this interrupt signal, outputs the change information 14 to the pass line 21, and reads it.

Thereafter, the group select signal is sent to the input/output device 50 via the output circuit 12, connector 8-2, and transmission cable 9-2.
The digital data group 10-1 is input to the data group selector 13, and data of the digital data group 10-1 in which a change has occurred is selected and output. This digital data group 10-1 is transmitted to the computer 40 via the transmission cable 9-1 and the connector 8-1, and is input to the input circuit 5-1.
0P via Shibasjiin 21 by reading command from UI
It is taken into the bladder-containing RAM 2 in the UI. The data of the changed digital data group 10-1 is thus read into the calculator 40.

Further, when a change occurs in a plurality of data groups of the digital data groups 10-1 to 10-n, the CPU 1 detects the contents from the change information 14 read from the input circuit 5-2 and outputs all data groups that have changed. A group select signal is outputted in a predetermined order for each data group to read the digital data of the data group, thereby completing a series of reading operations.

FIG. 3 is a flowchart showing the above-mentioned series of read operations that are restarted by an interrupt signal.

Oka, in the same figure, the block "1 narrow down compared to the previous data" indicates which pit of the digital data read into 0PUI.
This figure shows the operation of comparing with the previous digital data stored in the AM2 in order to detect the cause of Ki conversion, and is not directly related to the present invention.

[Other embodiments of the invention]

FIG. 4 is a block diagram showing another embodiment of the computer and its input/output device according to the present invention.

In this embodiment, the number of groups of digital data is t!
This configuration is applicable when the number of input points is equal to or less than a5, and the input circuit 5-2 in FIG. 2 can be omitted. That is, the output signal 14 of the data group state change detection circuit 15 is input to the digital data input point of a predetermined group (the first group in the figure) of the group selector 130, and the CPU 1 inputs the output signal 14 of the data group state change detection circuit 15 to the digital data input point of a predetermined group (the first group in the figure), and the CPU 1 inputs the output signal 14 of the data group state change detection circuit 15 to the digital data input point of a predetermined group (the first group in the figure). (Group 1 in the figure) is output, and the digital data is output to the data input point of other groups C excluding the predetermined group (Groups 2 to 24 in the figure). 2-1
Enter it as 0-24 to set the time. Therefore, in the timing state, the output signal 1 of the data group state change detection circuit 15
4 is transmitted to the computer 40 via the group selector 13, and a change in data is detected by the state change detection circuit 6.
An interrupt signal can be sent to 0PU1 via the interrupt generation circuit 7. When 0FU1 detects an interrupt signal, it issues a read command to input circuit 5 to read change information 14,
It is possible to detect a data group in which a change in digital data has occurred, and thereafter sequentially issue a group select signal for that data group in the same manner as described above to read digital data.

Although this embodiment has been described assuming that the number of input points of the input circuit 5 is 24, there is no limit to this number and any number of input points can be implemented.

According to this embodiment, the data group state scissors detection circuit 15
This eliminates the need for cables for transmitting the output signals, making system configuration even easier.

〔Effect of the invention〕

According to the computer and its input/output device of the present invention, even when inputting a large amount of digital data, the number of cores of the cable connecting the computer and the input/output device can be reduced, so the system configuration is easy. It is possible to strengthen noise resistance, improve reliability, and reduce the load on the computer for f-night reading. In addition, power consumption can be reduced because a large number of input circuits are not required as in the past, and non-stem configurations on the computer side can be standardized (modularization, unitization).
It is possible to obtain effects such as improved economic efficiency due to ease of miniaturization and lower price, and improved maintainability due to ease of maintenance and inspection.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional computer and its input/output device, FIG. 2 is a block diagram of an embodiment of the present invention's calculation (7!) and its input/output device, and FIG. 3 is a block diagram of the present invention's calculation (7!) and its input/output device. 4 is a block diagram of a total of n units and their input/output devices according to another embodiment of the present invention. 1... OPU 2... 几AM 3.・・ROM4−
1.・, DI module 5, 5-i... Input circuit 6.6-i... Status change detection circuit 7.7-7... Interrupt generation circuit 8-i Mountain connector 9-i... Transmission cable 1O- 1...Digital data group 12...Output circuit 13...Data group selector 15...Data group type 5 change/repair circulation 1@20.40...Computer 3 (1, 50...Input Output device. 21...Pass line and control line (7317) Representative patent attorney Chika Nori, Osamu Ashi (vl
or 1 person) Figure 1 Figure 2 Figure 3 Figure 4, 5'O

Claims (2)

[Claims] (1) In a computer that inputs a large amount of digital data and its input/output device, the large amount of digital data is divided into a plurality of data groups, and an arbitrary data group is selected by an input loop select signal. a data group selector that outputs as first digital data; and a first state that inputs the plurality of data groups, detects changes in the plurality of digital data for each data group, and outputs the detected data as second digital data. A change detection circuit is provided in the input/output device, and a first circuit receives the first digital data as input and outputs the input data to a pass line according to a command from a central processing unit (hereinafter referred to as CPU).
a second input circuit that receives the second digital data as an input and outputs the input data to the pass line according to a CPU command; a second state change detection circuit that detects the change; an interrupt generation circuit that sends an interrupt signal to the QOPU based on the detection signal of the second state change detection circuit; A computer and its input/output device, characterized in that an output circuit for sending out a group select signal is provided in the calculation section 1. (2) In the S machine that inputs a large amount of digital data and its input/output device, the large amount of digital data is divided into a plurality of data groups and inputted, and a group select signal is used to select an arbitrary data group. a data group selector that inputs the plurality of data groups, detects changes in the plurality of digital data into a data group phrase, and outputs the detected data as second digital data; A state change detection circuit is provided in the input/output device 1, the second digital data is input to a predetermined data group input point of the data group selector, and the first digital data is input to the central processing unit (hereinafter referred to as OPU). an input circuit that outputs the input data to the pass line in response to a command from the controller; a second state change detection circuit that receives the first digital data as input and detects a change in the input data; The computer is provided with an interrupt generation circuit that sends an interrupt signal to the CPU in response to a detection signal of a state change detection circuit, and an output circuit that sends the group select signal to the data group selector in response to a command from the CPU. 4? computer and its input/output device.