JPH08214017A - Data transmitter - Google Patents

Abstract

PURPOSE: To transmit plural data with simple configuration. CONSTITUTION: An input device 1 adds a unit number and a data number to plural received data and outputs them to a bus L. An output device 2 or arithmetic units 3, 4 receive the data with required unit number added to them among data sent through the bus L and process the data while regarding it as the one added with a prescribed data number. Then the output device 2 outputs data externally and the arithmetic units 3, 4 add a unit number to the received and processed data and output the resulting data again to the bus L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device for transmitting data such as a process amount.

[0002]

2. Description of the Related Art Conventionally, as a data transmission system, process data such as temperature collected by a slave station is transmitted to the master station via a transmission line by the slave station in response to a polling signal from the master station, and the data taken in by the master station is transferred. After the processing, there is a polling method in which another slave station transmits the polling signal again.

[0003]

However, in the polling system, since the main station is always required and the polling signal is always required, the device is complicated, and it takes a long time to respond and the communication speed is insufficient. is there.

In view of the above points, an object of the present invention is to provide a data transmission device having a simple structure and capable of flexibly and efficiently transmitting a large amount of data.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a device for outputting to a bus a device number unique to a device is attached to a plurality of consecutive data to which one data number is added, and a device required for data flowing through the bus. A device number for identifying the device number, and a capturing device for assigning a predetermined data number to each of the plurality of data on the basis of the data number to which the device number is attached and the data number to which a plurality of consecutive data items have been attached Data transmission device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural explanatory view showing an embodiment of the present invention. In FIG. 1, a bus L such as a common network as a transmission line is connected to, for example, an input device 1,
The output device 2, the arithmetic devices 3, 4, etc. are connected. Then, the output device 2, the arithmetic devices 3, 4 and the like constitute a capturing device.

The data such as the temperature input to the input device 1 is output to the bus L after being subjected to necessary processing such as linearization, with the device number unique to the input device 1.

Of the data flowing on the bus L, necessary data is output from the output device 2, the arithmetic unit 3,
4 will be taken in. Therefore, depending on which input device or arithmetic device data is required for these capture devices, the device number of the output data of the input device or arithmetic device required by the capture device is set as the capture number. Set in advance.

For example, if the data of the input device 1 is taken in by the output device 2 and the arithmetic device 3, the output device 2 and the arithmetic device 3 set the same number as the device number of the input device 1 as the take-in number. deep.

Of the data flowing through the bus L, the output device 2 discriminates and selects only the data having the device number of the corresponding input device 1 which coincides with the data acquisition number, fetches the data, and outputs the data after predetermined processing. .

Further, the arithmetic unit 3 selects, discriminates and fetches only the data having the device number of the input unit 1 which coincides with the fetch number from the data flowing on the bus L. Then, after performing other necessary arithmetic operations such as averaging, the data is given a unique device number of the arithmetic device 3 and output to the bus L.

By setting the device number of the arithmetic device 3 as the acquisition number of the arithmetic device 4, the arithmetic device 3
The output data of is captured by the arithmetic unit 4. And
The arithmetic unit 4 performs a predetermined arithmetic processing again, and outputs this data to the bus L with a unique device number of the arithmetic unit 4.

If two or more types of capture numbers are set in the arithmetic devices 3 and 4, various arithmetic processing can be performed on data from two or more types of devices.

By the way, for example, the input device 1 may have one input or plural inputs, and the output device 2 may have one output or plural outputs. A plurality of data transmissions between them may be performed as follows.

That is, when the plurality of data such as the measurement result output from the input device 1 is, for example, 10 channels, the data of each channel (data 1, data 2, ...
The data number added to the data 10) is "01-10".
Then, assuming that the device number of the input device 1 is “01”, one data number “01” is used as a representative, and outputs of a plurality of consecutive data are 01-01, data 1, data 2, ... , Data 10 Here, the front part of "01-01" is the device number and the rear part is the data number. That is, it is preliminarily prescribed that a predetermined continuous data number is attached to each data by attaching one data number to a plurality of data.

When these data are captured by the output device 2, if the capture number is set to "01" which is the device number of the input device 1, the output device 2 will be provided with the above data number. Further, a plurality of data are taken in, and each data is processed by giving a predetermined continuous data number based on the data number “01”. That is, it is interpreted and processed into 10 data such as 01 data 1, 02 data 2, ..., 10 data 10. Generally, if the above-mentioned one data number is AB, the predetermined data numbers given to a plurality of continuous data are as follows, for example.

AB, AB-1, AB-2, ..., AB-n AB, AB + 1, AB + 2, ..., AB + n AB-2, AB-1, AB, ..., AB- (n-2) AB + 5, AB + 6, AB + 7, ..., AB + (n + 5) AB, AB ± 1k, AB ± 2k, ..., AB ± nk Here, for example, if k = 2, then every two or so, etc. Which system should be used may be decided in advance by the system.

Next, for example, in order to improve the reliability of the transmission data from the input device 1, the following may be performed.
That is, with respect to a plurality of continuous data output from the input device 1 or the like, the data number is not fixed but the data number is changed and a predetermined or arbitrary number of data is output to the bus L. In other words, if 10 pieces of data of 10 channels are sent by 3 pieces, one representative data number is sequentially changed to 1, 2, 3, 4, ..., 10, 1, 2 ,. Correspondingly, three pieces of data are transmitted for each data number, for example, 12, 1, 3, 2, 1, 4, 3, 2 ... 10, 9, 8 1, 10, 9 2. The data has a sequence of data numbers of 1, 10, ..., and the same data always appears three times. The output from the input device 1 is as follows.

01-01, data 1 01-02, data 2, data 1 01-03, data 3, data 2, data 1 01-04, data 4, data 3, data 2 ... In order to capture, the capture number of the output device 2 may be set to "01". And the output device 2
Is a method of recovering, checking, and recovering data by taking in a plurality of consecutive data multiple times, rewriting the data with a plurality of data with the same data number, determining the data to be used by comparison, majority vote, etc. Predetermined processing such as monitoring is performed. In this way, the reliability of the data can be ensured while updating the data channel.

Further, even in the case of a fixed data number which is not changed, a plurality of continuous data are fetched a plurality of times, and a plurality of data having the same data number are used to perform the same predetermined processing, You may make it improve reliability etc.

Next, FIG. 2 shows a somewhat detailed configuration explanatory view using the input device 1 and the arithmetic device 3. For example, when the input device 1 outputs a plurality of data of the analog signals e1, e2, ..., En captured by the input device 1a such as a scanner, each analog data is converted into a digital signal by the AD converter 1b. The processing means 1c generates a plurality of continuous data, the number setting device 1e sets a unique device number, and the output means 1d attaches the device number and one data number to the continuous plurality of data. Output to the bus L.

The arithmetic unit 3 sets a necessary device number to be taken in by the take-in number setting device 3a, and among the data flowing on the bus L, a plurality of data numbers to which this device number is added are consecutive. Data is discriminated by the discriminating means 3b, selected and fetched. Then, the processing means 3c assigns a data number to each piece of data of a plurality of data, performs arithmetic processing, etc., sets a unique device number for the arithmetic device 3 by the number setting device 3e, and outputs the device number and one by the output means 3d. The data number is attached to a plurality of continuous data and output to the bus L. In this way, a predetermined data number is added to the data of the plurality of calculation results as described above with one data number. Further, the arithmetic unit 3 may directly input / output data to / from the outside.

As the device for outputting the data to the bus L, any device such as the input device 1, the arithmetic units 3 and 4 may be used.
The capturing device may be any of the output device 2, the arithmetic devices 3, 4, and the like.

That is, the device for outputting to the bus may be an input interface for outputting data input from another external connection device to the bus, or a setting device for setting data. An output interface that outputs the data captured from the external device,
A display device or the like that displays the captured data may be used.

[0025]

As described above, according to the present invention, in a device connected to a common bus, a device number and one data number are added to output a plurality of data to the bus, and a required device is provided. It is a data transmission device that takes in numbered data and assigns a predetermined data number to each of a plurality of data based on the data number. For this reason, the main master station is not required, the communication speed can be made sufficiently high, and the configuration with only a minimum of two devices and a bus can combine dozens or hundreds of data and devices as long as the number allows. What
It can be configured simply, arbitrarily, and flexibly, and can easily and sufficiently adapt to various systems, being highly flexible and expandable, effectively and efficiently. Also,
With the setting of one data number, a predetermined data number is added to a plurality of consecutive data, so it is not necessary to provide a data number for each data, and the data number can be easily assigned. Cohesive data can be transmitted quickly and can be effectively processed. Also, by using a predetermined number of overlapping data,
Since the same data appears many times, the reliability of the data is improved by rewriting and comparison by these.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is a structural explanatory view showing an embodiment of the present invention.

[Explanation of symbols]

 1 input device 2 output device 3, 4 arithmetic unit L bus

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04Q 9/00 321 E

Claims (3)

[Claims] 1. A device for outputting to a bus by adding a device-specific device number to a plurality of consecutive data to which one data number is added, and a device number required among data flowing through the bus are discriminated. A data transmission device comprising: a data number to which a device number is attached and a capturing device that attaches a predetermined data number to each of a plurality of data on the basis of a data number that has captured a plurality of consecutive data . 2. The data transmission device according to claim 1, wherein the device for outputting the data to the bus outputs a predetermined or arbitrary number of data to the bus by changing the data number. 3. The capturing device performs a predetermined process by using a plurality of pieces of data having the same data number, which are obtained by capturing a plurality of consecutive pieces of data a plurality of times. Item 2. The data transmission device according to item 2.