JPH08214016A - Data transmission equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Transmitting multiple data with a simple configuration. [Structure] An input device 1 attaches one data number to a plurality of input data and outputs the data to a bus L. The output device 2 or the arithmetic devices 3 and 4 take in these data having required data numbers out of the data flowing through the bus L, and give a predetermined data number to each data with reference to the data number. It is processed as a thing. And
The output device 2 outputs data to the outside, and the arithmetic devices 3, 4
Outputs the processed data to the bus L again with a data number.

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]

According to the present invention, there is provided a device for outputting a plurality of continuous data having one data number to a bus, and a device having a required data number of data flowing through the bus. The data transmission device is provided with a capturing device that assigns a predetermined data number to each data based on the data number that has captured the plurality of data.

[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 the data of the input device 1 is given a unique data number after necessary processing such as linearization is performed. .

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, the data number of the output data of the input device or the arithmetic device required by the input device depends on which input device or the data of the arithmetic device, etc. 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 data 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 data 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 data number of the input unit 1 which coincides with the fetch number from the data flowing through the bus L. Then, after performing other necessary arithmetic operations such as averaging, the data is given a unique data number of the arithmetic unit 3 and output to the bus L.

By setting the data number of the arithmetic unit 3 as the acquisition number of the arithmetic unit 4, the output data of the arithmetic unit 3 is taken in by the arithmetic unit 4. Then, the arithmetic unit 4 performs a predetermined arithmetic processing again, and this data is given a data number unique to the arithmetic unit 4 to add the data to the bus L.
Output to.

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".
If so, one data number “01” for the input device 1 is used as a representative, and outputs for a plurality of consecutive data are set as 01, data 1, data 2, ..., Data 10. . 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, the capture number is set to "01" which is the data number for the input device 1, and the output device 2
Then, a plurality of data to which the above-mentioned data numbers have been added are fetched, and each data is given a predetermined continuous data number based on the data number “01” and processed. 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. In this way, by using one data number, it is possible to give a data number to a plurality of data and transmit the data. Further, by setting the data number at the time of fetching arbitrarily, it is possible to send and receive data of an arbitrary portion of a plurality of continuous data.

Further, the capturing device enhances the reliability of the transmission data by capturing a plurality of continuous data a plurality of times and performing a predetermined process using the plurality of data having the same data number. be able to. In other words, data with the same number that appears multiple times determines the data to be used for data rewriting, comparison, majority voting, etc., and performs predetermined processing such as data recovery, checking, and monitoring to improve reliability. it can.

Next, FIG. 2 shows a slightly detailed configuration explanatory diagram 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 setter 1e sets one data number, the one data number is attached to a plurality of continuous data, and the output means 1d outputs the bus L. Output to.

The arithmetic unit 3 sets a necessary data number to be fetched by the fetch number setter 3a, and discriminates a plurality of continuous data to which this data number is attached from the data flowing on the bus L. It is discriminated in 3b, selected and fetched.
Then, the data number is assigned to each data of the plurality of data and arithmetic processing is performed by the processing means 3c, and the number setting device 3e is performed.
Then, the data number of the arithmetic unit 3 is set, and the output means 3d attaches the data number to a plurality of continuous data and outputs the data 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 and output. 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 devices 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 connecting device to the bus, or a setting device for setting the 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.

[0023]

As described above, according to the present invention, in a device connected to a common bus, one data number is attached to a plurality of data to be transmitted to the bus, and a required data number is attached. It is a data transmission device that takes in data and adds a predetermined data number to a plurality of data based on the data number. Therefore, the main master station is not required, the communication speed can be 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 the number allows. Is simple and arbitrary,
Moreover, it can be configured flexibly, and can easily and sufficiently cope with various systems, with high flexibility and expandability, effectively and efficiently. Moreover, since a predetermined data number is assigned to a plurality of consecutive data by setting one data number, it is not necessary to assign a data number to each data, and the data number can be easily assigned. so,
Cohesive data can be transmitted quickly and can be effectively processed. Also, by using a predetermined number of overlapping data, the same data will appear many times.
Improves data reliability.

[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

Claims (2)

[Claims] 1. A device for outputting a plurality of continuous data having one data number to a bus, and a device for fetching a plurality of continuous data having a required data number out of data flowing through the bus. A data transmission device, comprising: a capturing device for assigning a predetermined data number to each data based on the data number. 2. The capturing device according to claim 1, wherein the capturing device performs a predetermined process by using a plurality of pieces of data having the same data number, which are attached to a plurality of consecutive pieces of data a plurality of times. Data transmission equipment.