JPH08171406A - Data transmission controller - Google Patents
Data transmission controllerInfo
- Publication number
- JPH08171406A JPH08171406A JP6334488A JP33448894A JPH08171406A JP H08171406 A JPH08171406 A JP H08171406A JP 6334488 A JP6334488 A JP 6334488A JP 33448894 A JP33448894 A JP 33448894A JP H08171406 A JPH08171406 A JP H08171406A
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- JP
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- Prior art keywords
- transmission
- function
- value
- reception
- signal
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子制御装置（以下
「ＥＣＵ」という）同士で相互にデータの送受信を行う
通信装置におけるエラー発生状況を監視し、その状況に
応じて当該通信装置の制御を行うデータ伝送制御装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention monitors an error occurrence condition in a communication device in which electronic control devices (hereinafter referred to as "ECU") mutually transmit and receive data, and controls the communication device according to the condition. The present invention relates to a data transmission control device that performs
【０００２】[0002]
【従来の技術】例えば自動車に搭載される複数のＥＣＵ
を通信線で接続し、相互にデータの送受信を行うように
したデータ伝送システムは従来より知られている（特開
昭６１−１９５４５３号公報）。このシステムでは、所
定のＥＣＵからのエラー通報が所定回数をこえたとき、
そのＥＣＵは通信線から切り離される。2. Description of the Related Art For example, a plurality of ECUs mounted on an automobile
A data transmission system has been known in the prior art (Japanese Patent Application Laid-Open No. 61-195453) in which data are transmitted and received mutually by connecting them with a communication line. In this system, when the error notification from the predetermined ECU exceeds the predetermined number of times,
The ECU is disconnected from the communication line.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来のシステムでは、所定のＥＣＵがデータを送信してい
るときに発生したエラーとデータを受信しているときに
発生したエラーとを区別していないため、例えば受信又
は送信のいずれか一方は正常に行える可能性があるにも
拘わらず、通信線から切り離され、システム全体として
過度の機能低下を招く場合があった。However, the above-mentioned conventional system does not distinguish between an error that occurs when a predetermined ECU is transmitting data and an error that occurs when receiving data. Therefore, for example, although either the reception or the transmission may be normally performed, the function may be disconnected from the communication line and the system may be excessively deteriorated.
【０００４】本発明はこの点に着目してなされたもので
あり、エラーが多発するときでも、停止させる機能をよ
り限定し、過度の機能低下を回避することができるデー
タ伝送制御装置を提供することを目的とする。The present invention has been made in view of this point, and provides a data transmission control device capable of further limiting the function to be stopped and avoiding an excessive deterioration of the function even when many errors occur. The purpose is to
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
本発明は、電子制御装置同士で相互にデータの送受信を
行う通信手段におけるエラー発生状況を監視し、その状
況に応じて当該通信手段の制御を行うデータ伝送制御装
置において、データの送信成功を示す信号を発生する送
信成功信号発生手段と、データの送信失敗を示す信号を
発生する送信失敗信号発生手段と、データの受信成功を
示す信号を発生する受信成功信号発生手段と、データの
受信失敗を示す信号を発生する受信失敗信号発生手段
と、前記送信成功信号が入力されたとき第１の所定減算
値が減算され、前記送信失敗信号が入力されたとき第１
の所定加算値が加算される第１の計数手段と、前記受信
成功信号が入力されたとき第２の所定減算値が減算さ
れ、前記受信失敗信号が入力されたとき第２の所定加算
値が加算される第２の計数手段と、前記第１の計数手段
の計数値が第１の基準値以上となったとき、前記通信手
段の送信機能を停止させる送信機能停止手段と、前記第
２の計数手段の計数値が第２の基準値以上となったと
き、前記通信手段の受信機能を停止させる受信機能停止
手段とを設けるようにしたものである。In order to achieve the above-mentioned object, the present invention monitors an error occurrence situation in communication means for mutually transmitting and receiving data between electronic control devices, and according to the situation, the communication means In a data transmission control device for controlling, a transmission success signal generating means for generating a signal indicating a data transmission success, a transmission failure signal generating means for generating a signal indicating a data transmission failure, and a signal indicating a data reception success Receiving success signal generating means, a reception failure signal generating means for generating a signal indicating data reception failure, and a first predetermined subtraction value when the transmission success signal is input, and the transmission failure signal When is input first
And a second predetermined subtraction value when the reception success signal is input, and a second predetermined addition value when the reception failure signal is input. Second counting means to be added, transmission function stopping means for stopping the transmitting function of the communication means when the count value of the first counting means becomes equal to or larger than a first reference value, and the second counting means A reception function stopping means for stopping the reception function of the communication means when the count value of the counting means becomes equal to or larger than the second reference value is provided.
【０００６】[0006]
【作用】第１の計数手段により送信の成功の回数に対す
る失敗の回数の比率が大きくなるほど増加する計数値が
得られ、この計数値が第１の基準値以上となると、通信
手段の送信機能が停止される一方、第２の計数手段によ
り受信の成功の回数に対する失敗の回数の比率が大きく
なるほど増加する計数値が得られ、この計数値が第２の
基準値以上となると通信手段の受信機能が停止される。With the first counting means, a count value that increases as the ratio of the number of successful transmissions to the number of failed transmissions increases is obtained. When the counted value becomes equal to or greater than the first reference value, the transmission function of the communication means is changed. While stopped, the second counting means obtains a count value which increases as the ratio of the number of failures to the number of successes of reception increases, and when this count value becomes equal to or greater than the second reference value, the receiving function of the communication means. Is stopped.
【０００７】[0007]
【実施例】以下本発明の実施例を図面を参照して説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は、本発明の一実施例にかかる車両用
データ伝送システムの構成を示すブロック図であり、複
数のＥＣＵ１が通信線２を介して相互に接続されてい
る。ＥＣＵ１は、ＣＰＵ（Central Processing Unit）
１１、ＣＰＵ１１で実行されるプログラム等を記憶する
ＲＯＭ（Read Only Memory）１２、ＣＰＵ１１による演
算の結果や演算中のデータを記憶するＲＡＭ（Random A
ccess Memory）１３、他のＥＣＵとのデータの送受信制
御を行う通信ＩＣ１４及びこれらを接続するバス１５を
主たる構成要素とする。FIG. 1 is a block diagram showing the configuration of a vehicle data transmission system according to an embodiment of the present invention, in which a plurality of ECUs 1 are connected to each other via a communication line 2. The ECU 1 is a CPU (Central Processing Unit)
11, a ROM (Read Only Memory) 12 for storing programs executed by the CPU 11, a RAM (Random A) for storing the result of the calculation by the CPU 11 and the data being calculated.
ccess Memory) 13, a communication IC 14 that controls transmission / reception of data to / from another ECU, and a bus 15 that connects these components as main components.
【０００９】本実施例では、各ＥＣＵ１は、例えば当該
車両に搭載されたエンジンの制御、自動変速機の制御な
どを行うものであり、各ＥＣＵのＣＰＵ１１は、これら
の制御用のプログラムを実行するとともに通信ＩＣ１４
を介して他のＥＣＵとのデータの送受信を行う。In this embodiment, each ECU 1 controls, for example, an engine mounted on the vehicle and an automatic transmission, and the CPU 11 of each ECU executes a program for these controls. With communication IC14
Data is transmitted / received to / from another ECU via the.
【００１０】図２は、通信ＩＣ１４の構成を示すブロッ
ク図であり、通信ＩＣ１４は、送信機能部２１と、送信
エラー制御部２３と、受信機能部２２と、受信エラー制
御部２４とからなる。FIG. 2 is a block diagram showing the configuration of the communication IC 14, which is composed of a transmission function unit 21, a transmission error control unit 23, a reception function unit 22, and a reception error control unit 24.
【００１１】送信機能部２１は、データを通信線２に送
出するとともに送信の成功、失敗を判定し、送信成功信
号又はエラー発生信号を送信エラー制御部２３に入力す
る。送信エラー制御部２３は、送信機能部２１から入力
される送信成功信号又はエラー発生信号の発生回数に基
づいて、データの送信にかかるエラーの発生度合いを判
定し、エラー発生度合いが大きいときは送信機能を停止
させるべく機能停止信号を送信機能部２１へ出力する。
受信機能部２２は、データを通信線２から受信するとと
もに受信の成功、失敗を判定し、受信成功信号又はエラ
ー発生信号を受信エラー制御部２４に入力する。受信エ
ラー制御部２４は、受信機能部２２から入力される受信
成功信号又はエラー発生信号の発生回数に基づいて、デ
ータの受信にかかるエラーの発生度合いを判定し、エラ
ー発生度合いが大きいときは受信機能を停止させるべく
機能停止信号を受信機能部２２へ出力する。The transmission function unit 21 sends data to the communication line 2 and determines success or failure of transmission, and inputs a transmission success signal or an error occurrence signal to the transmission error control unit 23. The transmission error control unit 23 determines the occurrence degree of an error related to data transmission based on the number of times of the transmission success signal or the error occurrence signal input from the transmission function unit 21, and when the error occurrence degree is large, the transmission error control unit 23 transmits the transmission error signal. A function stop signal is output to the transmission function unit 21 to stop the function.
The reception function unit 22 receives data from the communication line 2, determines success or failure of reception, and inputs a reception success signal or an error occurrence signal to the reception error control unit 24. The reception error control unit 24 determines the occurrence degree of an error related to the data reception based on the number of times of the reception success signal or the error occurrence signal input from the reception function unit 22. When the error occurrence degree is large, the reception error control unit 24 receives the data. A function stop signal is output to the reception function unit 22 to stop the function.
【００１２】図３（ａ）は、送信エラー制御部２３の構
成を示すブロック図であり、送信エラー制御部２３は、
カウンタ３１と、比較器３２と、ＣＰＵ１１から入力さ
れる数値を保持するレジスタ３３、３４、３５とからな
る。FIG. 3A is a block diagram showing the configuration of the transmission error control unit 23. The transmission error control unit 23 is
It comprises a counter 31, a comparator 32, and registers 33, 34 and 35 for holding numerical values input from the CPU 11.
【００１３】カウンタ３１は、送信エラー信号が入力さ
れる毎にレジスタ３３に保持された所定加算値ＮＩＮＣ
Ｔだけ加算され、送信成功信号が入力される毎にレジス
タ３４に保持された所定減算値ＮＤＥＣＴだけ減算され
る。比較器３２は、カウンタ３１のカウント値ｎＥＲＲ
Ｔを基準値ＮＲＥＦＴと比較し、カウント値ｎＥＲＲＴ
が基準値ＮＲＥＦＴ以上となると、送信機能部２１へ機
能停止信号を出力する。この機能停止信号により、送信
機能部２１は作動を停止する。The counter 31 has a predetermined addition value NINC held in the register 33 every time a transmission error signal is input.
T is added, and a predetermined subtraction value NDECT held in the register 34 is subtracted every time the transmission success signal is input. The comparator 32 uses the count value nERR of the counter 31.
T is compared with the reference value NREFT, and the count value nERRT
When is above the reference value NREFT, a function stop signal is output to the transmission function unit 21. This function stop signal causes the transmission function unit 21 to stop operating.
【００１４】また、受信エラー制御部２４も、同図
（ｂ）に示すように、送信エラー制御部２３と同様に構
成され、カウンタ４１は、受信エラー信号が入力される
毎にレジスタ４３に保持された所定加算値ＮＩＮＣＲだ
け加算され、受信成功信号が入力される毎にレジスタ４
４に保持された所定減算値ＮＤＥＣＲだけ減算される。
比較器４２は、カウンタ４１のカウント値ｎＥＲＲＲを
基準値ＮＲＥＦＲと比較し、カウント値ｎＥＲＲＲが基
準値ＮＲＥＦＲ以上となると、受信機能部２２へ機能停
止信号を出力する。この機能停止信号により、受信機能
部２２は作動を停止する。The reception error control section 24 is also constructed in the same manner as the transmission error control section 23, as shown in FIG. 2B, and the counter 41 holds the register 43 each time a reception error signal is input. The predetermined addition value NINCR is added, and the register 4 is added each time the reception success signal is input.
The predetermined subtraction value NDECR held in 4 is subtracted.
The comparator 42 compares the count value nERRR of the counter 41 with the reference value NREFR, and when the count value nERRR becomes equal to or greater than the reference value NREFR, outputs a function stop signal to the reception function unit 22. This function stop signal causes the reception function unit 22 to stop operating.
【００１５】以上のように本実施例では、送信機能と受
信機能とを区別してエラーの発生度合いを監視し、エラ
ーの発生度合いが大きい機能のみを停止するようにした
ので、正常な機能まで停止させることがなく、データ伝
送システムの過度の機能低下を防止することができる。
また、所定加算値ＮＩＣＮＴ，ＮＩＮＣＲ及び所定減算
値ＮＤＥＣＴ，ＮＤＥＣＲを別個に設定できるので、重
要度の応じた優先順位をつけることができる。さらに、
基準値ＮＲＥＦＴ，ＮＲＥＦＲの設定を変えることによ
り、ノイズ等による瞬時的なエラーを無視する設定とす
ることができる。As described above, in the present embodiment, the transmission function and the reception function are distinguished from each other to monitor the degree of error occurrence, and only the function having a large degree of error occurrence is stopped. It is possible to prevent excessive deterioration of the function of the data transmission system.
Further, since the predetermined addition values NICNT, NINCR and the predetermined subtraction values NDECT, NDREC can be set separately, it is possible to set the priority order according to the importance. further,
By changing the settings of the reference values NREFT and NREFR, it is possible to make settings so that an instantaneous error due to noise or the like is ignored.
【００１６】なお、上述した実施例では、エラー制御部
２３、２４をカウンタ、比較器、レジスタの組合せで実
現したが、これに限るものではなく、ＣＰＵとメモリの
組合せにより、同様の機能を実現するようにしてもよ
い。図４は、その場合のＣＰＵにおける送信側のエラー
処理のフローチャートであり、本処理は例えば一定時間
毎に実行される。In the above embodiment, the error control units 23 and 24 are realized by the combination of the counter, the comparator and the register, but the present invention is not limited to this, and the same function is realized by the combination of the CPU and the memory. You may do it. FIG. 4 is a flowchart of the error processing on the transmission side in the CPU in that case, and this processing is executed, for example, at regular intervals.
【００１７】先ずステップＳ１では、送信成功信号が入
力されたか否かを判別し、その答が否定（ＮＯ）のとき
は、送信エラー信号が入力されたか否かを判別する。そ
して、いずれの信号も入力されていなければ、直ちに本
処理を終了する。First, in step S1, it is determined whether or not a transmission success signal has been input, and if the answer is negative (NO), then it is determined whether or not a transmission error signal has been input. Then, if neither signal is input, this processing is immediately terminated.
【００１８】送信成功信号が入力されたときは、ステッ
プＳ３に進み、カウント値ｎＥＲＲＴから所定減算値Ｎ
ＤＥＣＴを減算し、次いでｎＥＲＲＴ値が負の値か否か
を判別する（ステップＳ４）。ｎＥＲＲＴ≧０であれ
ば、直ちに本処理を終了し、ｎＥＲＲＴ＜０であれば、
ｎＥＲＲＴ＝０として（ステップＳ５）、本処理を終了
する。When the transmission success signal is input, the process proceeds to step S3, and the predetermined subtraction value N from the count value nERRT.
DECT is subtracted, and then it is determined whether or not the nERRT value is a negative value (step S4). If nERRT ≧ 0, this processing is immediately terminated, and if nERRT <0,
The processing is terminated by setting nERRT = 0 (step S5).
【００１９】一方、送信エラー信号が入力されたとき
は、ステップＳ６に進み、カウント値ｎＥＲＲＴに所定
加算値ＮＩＮＣＴを加算し、次いでｎＥＲＲＴ値が第１
の基準値ＮＲＥＦＴ以上か否かを判別する（ステップＳ
７）。ｎＥＲＲＴ＜ＮＲＥＦＴであれば、直ちに本処理
を終了し、ｎＥＲＲＴ≧ＮＲＥＦＴであれば、送信機能
停止信号を出力して（ステップＳ８）、本処理を終了す
る。On the other hand, when the transmission error signal is input, the process proceeds to step S6, the predetermined addition value NINCT is added to the count value nERRT, and then the nERRT value is the first value.
Of the reference value NREFT is determined (step S
7). If nERRT <NREFT, this processing is immediately terminated, and if nERRT ≧ NREFT, a transmission function stop signal is output (step S8), and this processing is terminated.
【００２０】なお、受信エラー制御部２４も同様にし
て、ＣＰＵとメモリの組合せで実現し、図４と同様の処
理を実行するようにしてもよい。The reception error control unit 24 may be similarly realized by a combination of a CPU and a memory, and the same processing as that shown in FIG. 4 may be executed.
【００２１】[0021]
【発明の効果】以上詳述したように本発明によれば、第
１の計数手段により送信の成功の回数に対する失敗の回
数の比率が大きくなるほど増加する計数値が得られ、こ
の計数値が第１の基準値以上となると、通信手段の送信
機能が停止される一方、第２の計数手段により受信の成
功の回数に対する失敗の回数の比率が大きくなるほど増
加する計数値が得られ、この計数値が第２の基準値以上
となると通信手段の受信機能が停止されるので、正常な
機能まで停止させることがなく、データ伝送系の過度の
機能低下を防止することができる。As described above in detail, according to the present invention, the first counting means obtains a count value which increases as the ratio of the number of transmission failures to the number of transmission failures increases. When the value becomes equal to or larger than the reference value of 1, the transmission function of the communication unit is stopped, while the second counting unit obtains a count value that increases as the ratio of the number of failures to the number of successful reception increases. Since the receiving function of the communication means is stopped when is equal to or more than the second reference value, it is possible to prevent the data transmission system from excessively deteriorating without stopping the normal function.
【図１】本発明の一実施例にかかるデータ伝送システム
の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a data transmission system according to an embodiment of the present invention.
【図２】図１の通信ＩＣの構成を示すブロック図であ
る。FIG. 2 is a block diagram showing a configuration of a communication IC of FIG.
【図３】図２の送信エラー制御部及び受信エラー制御部
の構成を示す図である。3 is a diagram showing configurations of a transmission error control unit and a reception error control unit of FIG.
【図４】送信エラー制御部におけるエラー処理の手順を
示すフローチャートである。FIG. 4 is a flowchart showing a procedure of error processing in a transmission error control unit.
１ 電子制御装置（ＥＣＵ） ２ 通信線 １４ 通信ＩＣ ２３ 送信エラー制御部 ２４ 受信エラー制御部 ３１ カウンタ ３２ 比較器 ３３、３４、３５ レジスタ ４１ カウンタ ４２ 比較器 ４３、４４、４５ レジスタ 1 Electronic Control Unit (ECU) 2 Communication Line 14 Communication IC 23 Transmission Error Control Unit 24 Reception Error Control Unit 31 Counter 32 Comparator 33, 34, 35 Register 41 Counter 42 Comparator 43, 44, 45 Register
Claims (1)
信を行う通信手段におけるエラー発生状況を監視し、そ
の状況に応じて当該通信手段の制御を行うデータ伝送制
御装置において、 データの送信成功を示す信号を発生する送信成功信号発
生手段と、 データの送信失敗を示す信号を発生する送信失敗信号発
生手段と、 データの受信成功を示す信号を発生する受信成功信号発
生手段と、 データの受信失敗を示す信号を発生する受信失敗信号発
生手段と、 前記送信成功信号が入力されたとき第１の所定減算値が
減算され、前記送信失敗信号が入力されたとき第１の所
定加算値が加算される第１の計数手段と、 前記受信成功信号が入力されたとき第２の所定減算値が
減算され、前記受信失敗信号が入力されたとき第２の所
定加算値が加算される第２の計数手段と、 前記第１の計数手段の計数値が第１の基準値以上となっ
たとき、前記通信手段の送信機能を停止させる送信機能
停止手段と、 前記第２の計数手段の計数値が第２の基準値以上となっ
たとき、前記通信手段の受信機能を停止させる受信機能
停止手段とを設けたことを特徴とするデータ伝送制御装
置。1. A data transmission control device, which monitors an error occurrence situation in communication means for mutually transmitting and receiving data between electronic control devices and controls the communication means in accordance with the situation, in order to check the success of data transmission. A transmission success signal generating means for generating a signal indicating the above, a transmission failure signal generating means for generating a signal indicating a data transmission failure, a reception success signal generating means for generating a signal indicating a successful reception of data, and a data reception failure A reception failure signal generating means for generating a signal indicating that a first predetermined subtraction value is subtracted when the transmission success signal is input, and a first predetermined addition value is added when the transmission failure signal is input. And a second predetermined subtraction value when the reception success signal is input, and a second predetermined addition value when the reception failure signal is input. A second counting means, a transmission function stopping means for stopping the transmitting function of the communication means when the count value of the first counting means becomes equal to or larger than a first reference value, and the second counting means A data transmission control device comprising: a reception function stopping means for stopping the reception function of the communication means when the count value becomes equal to or larger than a second reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33448894A JP3347230B2 (en) | 1994-12-19 | 1994-12-19 | Data transmission control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33448894A JP3347230B2 (en) | 1994-12-19 | 1994-12-19 | Data transmission control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08171406A true JPH08171406A (en) | 1996-07-02 |
| JP3347230B2 JP3347230B2 (en) | 2002-11-20 |
Family
ID=18277965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33448894A Expired - Fee Related JP3347230B2 (en) | 1994-12-19 | 1994-12-19 | Data transmission control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3347230B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008262538A (en) * | 2007-01-30 | 2008-10-30 | Hewlett-Packard Development Co Lp | Method and system for handling input/output (i/o) errors |
-
1994
- 1994-12-19 JP JP33448894A patent/JP3347230B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008262538A (en) * | 2007-01-30 | 2008-10-30 | Hewlett-Packard Development Co Lp | Method and system for handling input/output (i/o) errors |
| JP4641546B2 (en) * | 2007-01-30 | 2011-03-02 | ヒューレット−パッカード デベロップメント カンパニー エル．ピー． | Method and system for handling input / output (I / O) errors |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3347230B2 (en) | 2002-11-20 |
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