JPS61208335A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS61208335A
JPS61208335A JP60048845A JP4884585A JPS61208335A JP S61208335 A JPS61208335 A JP S61208335A JP 60048845 A JP60048845 A JP 60048845A JP 4884585 A JP4884585 A JP 4884585A JP S61208335 A JPS61208335 A JP S61208335A
Authority
JP
Japan
Prior art keywords
data
transmission
sent
transmitted
transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60048845A
Other languages
Japanese (ja)
Inventor
Yoshio Mase
真瀬 由夫
Masaru Nishijima
西島 勝
Katsutoshi Tagami
勝利 田上
Ryoichi Tsuchiya
土屋 良一
Kazuo Nakamura
一男 中村
Isato Muneyuki
宗行 勇人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Oki Electric Industry Co Ltd
Original Assignee
Honda Motor Co Ltd
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd, Oki Electric Industry Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP60048845A priority Critical patent/JPS61208335A/en
Priority to CA000503975A priority patent/CA1261022A/en
Priority to EP86103346A priority patent/EP0194673B1/en
Priority to US06/839,707 priority patent/US4747097A/en
Priority to DE8686103346T priority patent/DE3687172T2/en
Publication of JPS61208335A publication Critical patent/JPS61208335A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To attain proper processing in data transmission by collating reception data received through a transmission line with transmission data and facilitating the diagnosis of the transmission data when erroneous data is caused by an external noise signal on the transmission line. CONSTITUTION:When data is sent from a transmitter N1 to a transmission line 1, only the required data is fetched in the inside at the transmitters N2-Nn, the data on the transmission line is relayed and send to the next transmitter through the transmission line 1 as it is and the data as it is sent to the transmitter Nn existing before the transmitter N1 in transmitting state. In the transmitter N1 of transmitting state receives the data sent from the Nn this side and a collation diagnostic circuit 6 collates the said reception data with the transmission data sent to the line 1. Whether the sent data is abnormal or normal, the propriety of sent data is discriminated based on the collation in the circuit 6.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はデータ伝送装置における送信データの自己診断
を面子としたデータ伝送有金に間し1例えば、自動車の
電子制御に用いて好適なものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is suitable for use in the electronic control of automobiles, for example, in order to improve data transmission with the aim of self-diagnosis of transmitted data in a data transmission device. It is.

(従来の技術) 従来のデータ伝送方式としては、例えば、「自動車技術
Vo1.38. No、2J  (1984年発行、第
215頁〜第221頁)に記載されたものがある。
(Prior Art) As a conventional data transmission system, for example, there is one described in "Automotive Technology Vol. 1.38. No. 2J (published in 1984, pages 215 to 221).

この種の方式では、各装置から伝送路に送出されたデー
タが伝送路上において外部からのノイズ信号等の悪影響
を受け、これによるデータ誤りの発生を防止するため、
データに誤り検出用のデータ、例えば、水平・垂直パリ
ティやCRCデータなどを付加し、受信側の他の装置に
おいて検出用データのチェックを行い、これによりデー
タの良否を判定していた。この方式においては、検出用
データの構造を複雑に構成することにより、データチェ
ックの精度を向上できる利点がある。
In this type of system, data sent from each device to the transmission path is adversely affected by noise signals from the outside on the transmission path, and in order to prevent data errors from occurring due to this,
Error detection data, such as horizontal and vertical parity and CRC data, is added to the data, and the detection data is checked in another device on the receiving side, thereby determining whether the data is good or bad. This method has the advantage that the accuracy of data checking can be improved by configuring the detection data in a complex structure.

(発明が解決しようとする問題点) しかしながら、上記従来の方式においては、各装置が伝
送路に送出したデータを自からチェックする機能を有す
る構造となっていないため、例えば検出用データ自体に
誤りが生じるおそれもあり、このような場合には、伝送
されたデータの誤り検出を確実に行うことができず、正
確なデータを伝送できないという問題があった。
(Problems to be Solved by the Invention) However, in the conventional system described above, each device does not have a function to check the data sent to the transmission path by itself, so for example, the detection data itself contains errors. In such a case, it is impossible to reliably detect errors in the transmitted data, and there is a problem that accurate data cannot be transmitted.

(発明の目的) この発明は、以上述べたように伝送路上におけるデータ
誤りの検出における問題点を除去し、確実なデータを伝
送できるデータ伝送方式を提供することを目的とするも
のである。
(Objective of the Invention) As described above, it is an object of the present invention to provide a data transmission method that can eliminate the problems in detecting data errors on a transmission path and can reliably transmit data.

(問題点を解決するための手段) この発明のデータ伝送方式においては、複数の伝送装置
を伝送路によりループ状に連結し、この伝送路にデータ
を送出した伝送装置にループ状の伝送路を通じて自から
送出したデータを受信させ、内部に備えた照合診断回路
により送信データと受信データとを照合させて送信デー
タの良否を判断させるものである。
(Means for Solving the Problems) In the data transmission method of the present invention, a plurality of transmission devices are connected in a loop through a transmission path, and the transmission device that sends data to this transmission path is connected to the transmission device through the loop-shaped transmission path. The device receives data sent from itself, and uses an internal verification and diagnostic circuit to compare the transmitted data and received data to determine whether the transmitted data is good or bad.

(作用) このようなデータ伝送方式においては、伝送装置から伝
送路にデータが送出されると、このデータが指定された
他の伝送装置に受信されるとともにこのデータがループ
状の伝送装置を通じてこのデータを送出した伝送装置に
受信される。そして、この伝送袋とに設けられた照合診
断回路において、送出した送信データとループ状の伝送
路を通じて受信された受信データとが照合され、伝送路
に送出されたデータおよび誤り検出用データのチェック
が行われ、自から送出したデータの適否が判断される。
(Function) In such a data transmission system, when data is sent from a transmission device to a transmission path, this data is received by another designated transmission device, and this data is transmitted through a loop-shaped transmission device. The data is received by the transmission device that sent it. Then, in the verification diagnostic circuit provided in this transmission bag, the transmitted data is verified against the received data received through the loop-shaped transmission path, and the data sent to the transmission path and the data for error detection are checked. is performed, and the suitability of the data sent from itself is determined.

(実施例) 以下に本発明の一実施例を図面に基づいて説明する。(Example) An embodiment of the present invention will be described below based on the drawings.

図は本発明方式を実施するループネットワークを示して
おり、各電送装置(N+〜Nn)が二系統の伝送路(1
)によりループ状に連結されている。なお、図中には一
系統の伝送路のみを示す、これらの各伝送装置(N+〜
Nn)は、送出するデータを処理する処理部および伝送
路(1)にデータを送出する送信回路とからなる送信部
(2)と、伝送路(1)を通じて受信データを受信する
受信回路および受信データを処理する処理部からなる受
信部(3)と、これらの送信部(2)、受信部(3)と
伝送路(1)とを切換え接続する切換え回路(4)とを
備えている。さらに、各伝送装置(Nl−Nn)は、伝
送路(1)上のデータの有無により中継状態か送信状態
かを判断して切換え回路(4)を切換え制御する制御部
(5)と、送出した送信データと伝送路(1)を通じて
受信される受信データとを照合し、同一データであるか
どうか、すなわち、伝送路(1)に送出されたデータが
正常であるか異常であるかを判断する照合診断回路(8
)とを備え、前記制御部(5)には送出されたデータが
異常であるときに別系統の伝送路に切換えてデータのサ
イクリック送出を継続させる機能を備えた構成である。
The figure shows a loop network implementing the method of the present invention, in which each transmission device (N+ to Nn) has two transmission paths (1
) are connected in a loop. Note that each of these transmission devices (N+ to
Nn) includes a transmitting unit (2) consisting of a processing unit that processes data to be transmitted and a transmitting circuit that transmits data to the transmission path (1), a receiving circuit that receives received data through the transmission path (1), and a receiving circuit. It includes a receiving section (3) consisting of a processing section that processes data, and a switching circuit (4) that switches and connects these transmitting section (2), receiving section (3), and transmission path (1). Furthermore, each transmission device (Nl-Nn) includes a control unit (5) that determines whether it is in a relay state or a transmission state depending on the presence or absence of data on the transmission path (1) and controls switching of the switching circuit (4); The transmitted data and the received data received through the transmission path (1) are compared to determine whether they are the same data, that is, whether the data sent to the transmission path (1) is normal or abnormal. Verification diagnostic circuit (8
), and the control section (5) has a function of switching to a different transmission line to continue cyclic transmission of data when the transmitted data is abnormal.

次にこのようなループネットワークシステムを用いてデ
ータ伝送を行うデータ伝送方式について説明する。なお
、特定の伝送装置(Noからデータが送出される場合に
ついて説明する。
Next, a data transmission method for transmitting data using such a loop network system will be explained. Note that a case will be described in which data is sent from a specific transmission device (No.

まず、伝送装置(N1)から伝送路(1)へデータを送
出する際には、伝送装置(N1)が制御部(5)により
その内部に備えた切換え回路(リレー)(4)が開放状
態に切換えられて送出状態となり、この伝送装置(N+
)からデータが送出される。このデータに基づいて、他
の伝送装置(Hz〜Nn)では各内部に備えた切換え回
路(リレー)(4)がそれぞれ各制御部(5)により接
続状態に切換えられ他の全ての伝送装置(H2〜Nn)
が中継状態に維持される。
First, when transmitting data from the transmission device (N1) to the transmission line (1), the control section (5) of the transmission device (N1) sets the internal switching circuit (relay) (4) to an open state. is switched to the sending state, and this transmission device (N+
) data is sent out. Based on this data, the switching circuits (relays) (4) provided inside each of the other transmission devices (Hz to Nn) are switched to the connected state by the respective control units (5), and all other transmission devices ( H2~Nn)
is maintained in a relay state.

伝送装置(N+)から伝送路(1)にデータが送出され
ると、それぞれの伝送装置(N2〜in)においては必
要なデータだけを内部に取込むとともに伝送路(1)上
のデータを中継してそのまま伝送路(1)を通じて次の
伝送装置に順次、伝送し、送出状態の伝送装置(N1)
の手前の伝送装置(Nn)までそのままデータが伝送さ
れる。そして、送出状態の伝送装置(Noにおいては、
その手前の伝送装置(Nn)から送出されるデータを受
信し、この受信データと伝送路(1)に送出した送信デ
ータとの照合が照合診断回路(6)により行われる。こ
の照合診断回路(6)内では、照合に基づいて送出デー
タが異常であるか正常であるか送出データの適否が判別
され、異常の場合には、制御部(5)の指令により前回
送出したデータが無効であるという無効通知を含む無効
データを送信部(2)から送出し、この無効データによ
り先のデータの異常が他の伝送装置に対して無効である
ことが通知される。したがって、伝送路に送出されたデ
ータに何らかの原因で誤りが発生した場合には、送信状
態にある伝送装置内において、容易に自己診断を行うこ
とができ、適切な対応処理を行うことができる0例えば
、異常状態の判断がなされた場合には、別系統の伝送路
を用いてデータのサイクリック伝送を継続させることも
可能である。
When data is sent from the transmission device (N+) to the transmission path (1), each transmission device (N2 to in) takes in only the necessary data and relays the data on the transmission path (1). Then, it is transmitted to the next transmission device sequentially through the transmission path (1), and the transmission device (N1) in the sending state is transmitted.
The data is transmitted as is to the transmission device (Nn) in front of it. Then, the transmission device in the sending state (in No.
The data transmitted from the transmission device (Nn) in front of the transmission device (Nn) is received, and the verification and diagnosis circuit (6) compares the received data with the transmitted data transmitted to the transmission path (1). In this verification diagnostic circuit (6), the suitability of the transmitted data is determined based on the verification, whether the transmitted data is abnormal or normal, and if it is abnormal, it is determined whether the transmitted data is abnormal or not. Invalid data including an invalidity notification that the data is invalid is sent from the transmitter (2), and this invalid data notifies other transmission devices that the previous data abnormality is invalid. Therefore, if an error occurs for some reason in the data sent to the transmission path, self-diagnosis can be easily performed within the transmission device that is in the transmitting state, and appropriate countermeasures can be taken. For example, if an abnormal state is determined, it is possible to continue cyclic data transmission using a different transmission line.

なお、上記伝送装置(N1)と他の装置(N2〜Nn)
とがともに送出状態になった場合には、伝送装置(N1
)において、受信データと送信データとが当然として異
なる(一般にデータには送出する装置表示番号等が付加
されており、これに基づいて、データの確認が行われる
。)ことから、このデータ送出そのものを無効とすると
ともに、伝送装置(N+)を切換え回路(4)により一
旦、中継状態に切換えた後、問題を生じない一定時間経
過後に再び切換え回路(4)の切換えにより送出状態に
しデータの再送出が行われる。
In addition, the above transmission device (N1) and other devices (N2 to Nn)
If both are in the sending state, the transmission device (N1
), the received data and the transmitted data are naturally different (generally, the data is attached with a display number of the sending device, etc., and the data is confirmed based on this). At the same time, the transmission device (N+) is first switched to the relay state by the switching circuit (4), and after a certain period of time without causing any problems, the switching circuit (4) is switched again to the sending state and the data is retransmitted. A ceremony will take place.

(発明の効果) 以北説明したように本発明によれば、複数の伝送袋とを
伝送路によりループ状に連結し、データを送出した伝送
装置において、送信データと伝送路を通じて受信される
受信データとを照合させることにより、伝送路上で外部
ノイズ信号等による誤りデータが生じた場合には送出デ
ータの診断を容易に行うことができるとともに、これに
伴なってデータ伝送における適切なる処理を可能にする
ことができる効果が期待できる。また、データ伝送方式
に用いる伝送装置に送受信部を備えるとともに伝送路が
ループ状であるため、他のあらゆる伝送システムにも適
用することができるという効果をも期待することができ
る。
(Effects of the Invention) As described above, according to the present invention, in a transmission device that connects a plurality of transmission bags in a loop through a transmission path and transmits data, the transmission data and the reception received through the transmission path are By comparing the data with the data, it is possible to easily diagnose the transmitted data in the event that erroneous data occurs due to external noise signals etc. on the transmission path, and in conjunction with this, it is possible to perform appropriate processing during data transmission. We can expect the effects that can be achieved. Further, since the transmission device used in the data transmission system includes a transmitting/receiving section and the transmission path is loop-shaped, the present invention can be expected to have the effect of being applicable to all other transmission systems.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例に係り、データ伝送方式を実施
するループ状のネットワークを示す概略構成図である。 (1)・・・・・・・・・・・・伝送路(4)・・・・
・・・・・・・・切換え回路(6)・・・・・・・・・
・・・照合診断回路(N+〜Nn)・・・伝送装置
The drawing is a schematic configuration diagram showing a loop-shaped network implementing a data transmission method according to an embodiment of the present invention. (1)......Transmission line (4)...
......Switching circuit (6)...
...Verification diagnostic circuit (N+~Nn)...Transmission device

Claims (1)

【特許請求の範囲】[Claims]  複数の伝送装置をループ状に連結する伝送路を通じて
データ伝送を行うデータ伝送方式において、前記複数の
伝送装置の各々に、伝送路上のデータに基づき中継状態
か送信状態かを判断して切換える切換え回路と送信デー
タと受信データとを照合して正常か異常かを判断する照
合診断回路とを設け、送信状態にある伝送装置から伝送
路にデータが送出された際に、この送信データを伝送路
を通じてこのデータを送出した伝送装置に受信させ、前
記照合診断回路により送信データと受信データとを照合
させ、送信データの適否を判断させることを特徴とする
データ伝送方式。
In a data transmission method in which data is transmitted through a transmission path connecting a plurality of transmission devices in a loop, each of the plurality of transmission devices includes a switching circuit that determines and switches between a relay state and a transmission state based on data on the transmission path. and a verification diagnostic circuit that compares the transmitted data with the received data to determine whether the data is normal or abnormal. A data transmission system characterized in that the data is received by the transmission device that sent the data, and the verification/diagnosis circuit compares the transmitted data with the received data to determine whether or not the transmitted data is appropriate.
JP60048845A 1985-03-12 1985-03-12 Data transmission system Pending JPS61208335A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP60048845A JPS61208335A (en) 1985-03-12 1985-03-12 Data transmission system
CA000503975A CA1261022A (en) 1985-03-12 1986-03-12 Multiplex transmission system
EP86103346A EP0194673B1 (en) 1985-03-12 1986-03-12 Multiplex transmission system
US06/839,707 US4747097A (en) 1985-03-12 1986-03-12 Multiplex transmission system
DE8686103346T DE3687172T2 (en) 1985-03-12 1986-03-12 MULTIPLEXUE TRANSMISSION SYSTEM.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60048845A JPS61208335A (en) 1985-03-12 1985-03-12 Data transmission system

Publications (1)

Publication Number Publication Date
JPS61208335A true JPS61208335A (en) 1986-09-16

Family

ID=12814590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60048845A Pending JPS61208335A (en) 1985-03-12 1985-03-12 Data transmission system

Country Status (1)

Country Link
JP (1) JPS61208335A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4941045A (en) * 1972-08-26 1974-04-17
JPS5338941A (en) * 1976-09-22 1978-04-10 Hitachi Ltd Circuit control system
JPS58164351A (en) * 1982-03-24 1983-09-29 Yokogawa Hokushin Electric Corp Loop type data communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4941045A (en) * 1972-08-26 1974-04-17
JPS5338941A (en) * 1976-09-22 1978-04-10 Hitachi Ltd Circuit control system
JPS58164351A (en) * 1982-03-24 1983-09-29 Yokogawa Hokushin Electric Corp Loop type data communication system

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