JPH02202148A - Device for judging abnormal signal in electronic controller - Google Patents
Device for judging abnormal signal in electronic controllerInfo
- Publication number
- JPH02202148A JPH02202148A JP1019753A JP1975389A JPH02202148A JP H02202148 A JPH02202148 A JP H02202148A JP 1019753 A JP1019753 A JP 1019753A JP 1975389 A JP1975389 A JP 1975389A JP H02202148 A JPH02202148 A JP H02202148A
- Authority
- JP
- Japan
- Prior art keywords
- electronic control
- signal
- output
- control device
- abnormal signal
- 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
Links
Landscapes
- Dc Digital Transmission (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は電子制？１１ 装置へ入力されるデジタル信
号と異常信号の判別ができるようにした電子制御装置の
異常信号判定装置に関する。[Detailed description of the invention] (Field of industrial application) Is this invention electronic? 11. The present invention relates to an abnormal signal determination device for an electronic control device that can distinguish between a digital signal input to the device and an abnormal signal.
（従来の技術）
従来第２図に示すような電子制ｔＩｌｌ装置ａは出力装
置すとハーネスＣを介して接続されていて、出力装置す
より入力されるデジタル信号をもとに処理を行うように
なっている。(Prior Art) Conventionally, an electronic control device a as shown in FIG. It has become.
このような回路では出力値２ｂのトランジスタＴｒがオ
ン（導通）すると、その出力がほぼＱＶとなり、電子制
御装置ａはこのときオン信号を図示しない中央処理装置
のインタフェースへ出力し、トランジスタＴｒがオフに
なると、その出力は＋５ｖとなって上記インタフェース
へオフ信号を出力するようになっている。In such a circuit, when the transistor Tr with an output value of 2b is turned on (conducted), its output becomes approximately QV, and the electronic control unit a outputs an on signal to the interface of the central processing unit (not shown) at this time, and the transistor Tr is turned off. When this happens, its output becomes +5v and an off signal is output to the above interface.
（発明が解決しようとする課題）
上記のようなデジタル信号を扱う電子制御装Ｗａでは、
ハーネスＣに断線が発生した場合はプルアップ抵抗Ｒ１
により電子制御装置ａに＋５Ｖが、また地絡（接地へ短
絡）などが発生すると電子制御装置′！ｔａ、へＯｖが
入力されるため。(Problem to be solved by the invention) In the electronic control device Wa that handles digital signals as described above,
If a disconnection occurs in harness C, pull-up resistor R1
When a ground fault (short circuit to ground) occurs, the electronic control device '! Because Ov is input to ta.
電子制御装置ａは入力信号が異常であってもインタフェ
ースへオフやオン信号を出力し、正常１３号と異常信号
の判別ができないなどの不具合があった。Electronic control unit a outputs an off or on signal to the interface even if the input signal is abnormal, and there were problems such as being unable to distinguish between normal No. 13 and abnormal signals.
この発明は上記不具合を改善する目的でなされたもので
、ハーネスの断線や地絡により発生する異常信号と正常
な信号が判別できるようにした電子制御装置の異常信号
判定装置を提供しようとするものである。This invention was made with the aim of improving the above-mentioned problems, and aims to provide an abnormal signal determination device for an electronic control unit that can distinguish between abnormal signals generated due to harness breakage or ground faults and normal signals. It is.
（課題を解決するための手段及び作用）この発明は上記
目的を達成するために、デジタル信号を出力する出力装
置と、該出力装置より人力される信号をインターフェー
スを介して中央処理装置へ出力する電子制御装置の間を
ハーネスにより接続したものにおいて、上記出力装置の
出力段に設けられたトランジスタのエミッタと接地間に
分圧抵抗を設けると共に電子制御装置の入力側と接地間
にプルダウン抵抗を設けて、出力装置より出力されるオ
ン、オフ信号よりなるデジタル信号と、ハーネスの断線
や地絡などにより発生する異常信号とが判別できるよう
にした。電子制御ｎ装置の異常信号判定装置を提供する
ものである。(Means and Effects for Solving the Problems) In order to achieve the above object, the present invention includes an output device that outputs a digital signal, and a signal manually input from the output device that outputs the signal to a central processing unit via an interface. In the case where the electronic control devices are connected by a harness, a voltage dividing resistor is provided between the emitter of the transistor provided in the output stage of the output device and the ground, and a pull-down resistor is provided between the input side of the electronic control device and the ground. This makes it possible to distinguish between digital signals consisting of on and off signals output from the output device and abnormal signals caused by harness breaks, ground faults, etc. The present invention provides an abnormal signal determination device for an electronically controlled device.
（実施例）
この発明の一実施例を図面を参照して詳述する。ｌ！Ｉ
においてｌは電子制御装置で、入力側がハーネス２を介
して出力装置３の出力側に、そして出力側がインターフ
ェースを介して中央処理装置！（ともに図示せず）に接
続されている。(Example) An example of the present invention will be described in detail with reference to the drawings. l! I
In, l is an electronic control unit, the input side is connected to the output side of the output device 3 via the harness 2, and the output side is connected to the central processing unit via the interface! (both not shown).
上記出力装置３は出力段にトランジスタＴｒを有してい
て、このトランジスタＴｒのコレクタは抵抗Ｒ，を介し
て電源（５■）の＋側と出力端子３ａに、そしてエミッ
タは分圧抵抗Ｒ５を介して接地されている。The output device 3 has a transistor Tr in its output stage, and the collector of this transistor Tr is connected to the + side of the power supply (5) and the output terminal 3a via a resistor R, and the emitter is connected to a voltage dividing resistor R5. is grounded through.
また電子制御装置１の入力端子ｌａ側もプルダウン抵抗
Ｒ４を介して接地されている。Further, the input terminal la side of the electronic control device 1 is also grounded via a pull-down resistor R4.
次に作用を説明する。出力装置３のトランジスタＴｒが
オンになると、電子制御装置１へはの信号が入力され、
電子制御装置ｌはこれをオン信号と判定してインターフ
ェースへ出力する。Next, the effect will be explained. When the transistor Tr of the output device 3 is turned on, a signal is input to the electronic control device 1,
The electronic control unit 1 determines this as an on signal and outputs it to the interface.
次にトランジスタＴｒがオフになると、電子制御装置ｌ
の入力信号は＋５ｖとなり、これをオフ信号と判定する
。Next, when the transistor Tr is turned off, the electronic control device l
The input signal becomes +5V, and this is determined to be an off signal.
以上の判定信号をもとに中央処理装置は各種の処理を行
うことになるが、出力装置３と電子制御装置ｌを接続し
ているハーネス２に断線や地絡などが発生すると、電子
制御装置１０入力はＯｖとなるため、入力信号により正
常信号と異常信号の判別が行えるようになる。The central processing unit performs various processes based on the above judgment signals, but if a disconnection or ground fault occurs in the harness 2 that connects the output device 3 and the electronic control unit l, the electronic control unit Since the 10th input is Ov, it becomes possible to distinguish between a normal signal and an abnormal signal based on the input signal.
（発明の効果）
この発明は以上詳述したように、電子制御装置へ入力さ
れる正常なデジタル信号と、ハーネスなどの断線や地絡
により発生する異常信号が判別できるようにしたことか
ら、故障の［１の自己診断が節単に行えると共に、異常
信号が入力した場合、自動的にバックアンプを行うよう
にすることにより、システム全体の信鎖性を一段と向上
させることができる。(Effects of the Invention) As described in detail above, this invention makes it possible to distinguish between a normal digital signal input to an electronic control device and an abnormal signal caused by a break in a harness or a ground fault. The self-diagnosis in [1] can be performed easily, and the reliability of the entire system can be further improved by automatically performing back-amplification when an abnormal signal is input.
第１図はこの発明装置の一実施例を示す回路図、第２図
は従来の説明図である。
■・・・電子制御装置。
３・・・出力装置。
Ｒコ・・・分圧抵抗。
２・・・ハーネス。
Ｔｒ・・・トランジスタ。
Ｒ４・・・プルダウン抵抗。FIG. 1 is a circuit diagram showing an embodiment of the device of the present invention, and FIG. 2 is an explanatory diagram of a conventional device. ■...Electronic control device. 3...Output device. R: Voltage dividing resistor. 2...Harness. Tr...Transistor. R4...Pull-down resistor.
Claims (1)
り入力される信号をインタフェースを介して中央処理装
置へ出力する電子制御装置１の間をハーネス２により接
続したものにおいて、上記出力装置３の出力段に設けら
れたトランジスタＴｒのエミッタと接地間及び電子制御
装置１の入力側と接地間にそれぞれ分圧抵抗Ｒ＿３及び
プルダウン抵抗Ｒ＿４を設けてなる、電子制御装置の異
常信号判定装置。An output device 3 that outputs a digital signal and an electronic control device 1 that outputs a signal inputted from the output device 3 to a central processing unit via an interface are connected by a harness 2. An abnormal signal determination device for an electronic control device, which includes a voltage dividing resistor R_3 and a pull-down resistor R_4 between the emitter of a transistor Tr provided in an output stage and ground, and between the input side of an electronic control device 1 and ground, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019753A JPH02202148A (en) | 1989-01-31 | 1989-01-31 | Device for judging abnormal signal in electronic controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019753A JPH02202148A (en) | 1989-01-31 | 1989-01-31 | Device for judging abnormal signal in electronic controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02202148A true JPH02202148A (en) | 1990-08-10 |
Family
ID=12008103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1019753A Pending JPH02202148A (en) | 1989-01-31 | 1989-01-31 | Device for judging abnormal signal in electronic controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02202148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111610A (en) * | 1989-11-24 | 1992-05-12 | Morisset Bernard G | Insect-killing device |
-
1989
- 1989-01-31 JP JP1019753A patent/JPH02202148A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111610A (en) * | 1989-11-24 | 1992-05-12 | Morisset Bernard G | Insect-killing device |
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