JPH0210935A - Signal transmission equipment - Google Patents
Signal transmission equipmentInfo
- Publication number
- JPH0210935A JPH0210935A JP63161820A JP16182088A JPH0210935A JP H0210935 A JPH0210935 A JP H0210935A JP 63161820 A JP63161820 A JP 63161820A JP 16182088 A JP16182088 A JP 16182088A JP H0210935 A JPH0210935 A JP H0210935A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- photocoupler
- line
- capacitor
- turned
- 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.)
- Granted
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は伝送電源と伝送信号とを同一伝送バスで供給
するマルチドロップ方式の伝送装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-drop type transmission device that supplies transmission power and transmission signals through the same transmission bus.
し従来の技術］
第３図は例えば従来の伝送システムの概略構成を示す接
続図である。図において、伝送バス３０は伝送電源線３
１と伝送信号線３２と接地線３３とで構成され、伝送電
源線３１と接地線３３との間には伝送電源６０が接続さ
れている。伝送子局４０．５０は伝送バス３０にマルチ
ドロップ方式で接続されている。伝送子局のドライバー
４１．５１と伝送子局のレシーバ４２．５２で構成され
ているホトカブラは伝送子局４０．５０と伝送バス３０
との間のインターフェースとして機能している。抵抗４
３．４４．５３．５４によって伝送電源を分圧しホトカ
ブラに接続されている。BACKGROUND ART] FIG. 3 is a connection diagram showing a schematic configuration of, for example, a conventional transmission system. In the figure, the transmission bus 30 is the transmission power line 3
1, a transmission signal line 32, and a ground line 33, and a transmission power supply 60 is connected between the transmission power line 31 and the ground line 33. The transmission slave stations 40 and 50 are connected to the transmission bus 30 in a multi-drop manner. The photocoupler, which is composed of a transmission slave station driver 41.51 and a transmission slave station receiver 42.52, connects a transmission slave station 40.50 and a transmission bus 30.
It functions as an interface between resistance 4
The voltage of the transmission power source is divided by 3.44.53.54 and connected to the photocoupler.
次に動作について説明する。伝送子局４０の場合はドラ
イバ４１を０Ｎ−ＯＦＦの動作をさせることで、伝送バ
ス３０の伝送信号線３２と接地線３３の間もこれに対応
して０Ｎ−ＯＦＦ動作をし、信号は送信される。また、
伝送バス３０からの信号受信は、レシーバ４２が伝送信
号線３２の電圧の高低により０Ｎ−ＯＦＦ動作をし、受
信される。伝送バス上に信号がない場合、伝送信号線３
２の電圧は抵抗４３．４４により伝送電源６０の電圧が
分圧された値になっており、ホトカブラのレシーバ４２
はＯＮの状態になっている。伝送子局５０の場合も動作
は同じである。Next, the operation will be explained. In the case of the transmission slave station 40, by operating the driver 41 ON-OFF, the transmission signal line 32 of the transmission bus 30 and the ground line 33 also perform an ON-OFF operation correspondingly, and the signal is not transmitted. be done. Also,
A signal from the transmission bus 30 is received by the receiver 42 performing an ON-OFF operation depending on the voltage level of the transmission signal line 32. If there is no signal on the transmission bus, transmission signal line 3
The voltage at 2 is a value obtained by dividing the voltage of the transmission power supply 60 by the resistors 43 and 44, and the voltage at the receiver 42 of the photocoupler is
is in the ON state. The operation of the transmission slave station 50 is the same.
［発明が解決しようとする課題］
従来の信号伝送装置は以上のように構成されているので
、伝送電源線の短絡、送信用ドライバーの短絡、伝送信
号線の短絡などの事故が少なくとも一箇所で起こればそ
のシステム全体が使用不能になるという問題があった。[Problems to be Solved by the Invention] Since the conventional signal transmission device is configured as described above, accidents such as a short circuit in the transmission power line, a short circuit in the transmission driver, and a short circuit in the transmission signal line can be prevented at least in one place. The problem was that if this happened, the entire system would become unusable.
この発明は上記のような問題を解消するためになされた
もので、少なくとも一箇所で起こった伝送バス等の短絡
事故などによって伝送システム全体が使用不能にならな
い信号伝送装置を得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and aims to provide a signal transmission device in which the entire transmission system will not become unusable due to a short-circuit accident in the transmission bus or the like that occurs in at least one location. .
［課題を解決するための手段］
この発明に係る信号伝送装置はマルチドロップ方式で伝
送電源線及び伝送信号線に接続され、それぞれの線路の
異常状態を判別する判別回路と、判別回路に接続され異
常状態時間の検出をする検出装置と、検出装置よりの出
力により接続している伝送電源線間及び伝送信号線間を
離接可能な離接機構とを具備したものである。[Means for Solving the Problems] A signal transmission device according to the present invention is connected to a transmission power line and a transmission signal line in a multi-drop manner, and includes a discrimination circuit for determining an abnormal state of each line, and a discrimination circuit connected to the discrimination circuit. The apparatus is equipped with a detection device that detects abnormal state time, and a separation mechanism that can separate and separate the transmission power lines and the transmission signal lines connected by the output from the detection device.
［作用コ
この発明における信号伝送装置は伝送電源線、伝送信号
線のどこかで短絡したとき、その短絡箇所を判別回路に
よって判別し、検出装置によって短絡時間を検出し、こ
の短絡状態が一定時間以上続くと、検出装置の出力によ
って離接機構を動作させ、短絡箇所のある線路を伝送バ
スより切り離す。切り離された線路が正常に復帰すると
、これを判別回路が確認し検出装置を介して離接機構に
より接続される。[Operation] When a short circuit occurs somewhere in the transmission power line or the transmission signal line, the signal transmission device according to the present invention uses a discriminating circuit to determine the short circuit location, detects the short circuit time using the detection device, and detects the short circuit state for a certain period of time. If this continues, the output of the detection device operates the disconnection mechanism, and the line with the short circuit is disconnected from the transmission bus. When the disconnected line returns to normal, the discrimination circuit confirms this and the line is connected by the disconnection mechanism via the detection device.
［実施例］
以下、この発明の一実施例を図で説明する。第１図はこ
の一実施例による伝送装置を示す接続図である。第１図
において、伝送バス３０は伝送電源線３１．３４と伝送
信号線３２．３５と接地線３３．３６とで構成され、伝
送電源線３１．３４と接地線３３．３５との間には伝送
電源６０が接続されている。伝送電源線３１と３４はリ
レーのｂ接点ＲＹｂｌを介して接続され、伝送信号線３
２と３５はリレーのｂ接点ＲＹｂ２を介して接続されて
いる。ＤＩ、Ｄ２はダイオードを示しており、Ｒｌ、
Ｒ２，Ｒ３，Ｒ４は抵抗を示している。ＰＣＩＡ、 Ｐ
Ｃ２Ａは伝送信号線３２．３５と接地線３３．３６との
間に抵抗Ｒ２，Ｒ４を介して接続されているホトカブラ
の発光部を示している。この実施例の場合、判別回路は
抵抗Ｒ１゜Ｒ２，Ｒ３，Ｒ４，Ｒ６ホトカプラの発光部
ＰＣＩＡ、 ＰＣ２Ａ、ホトカプラのスイッチング部Ｐ
ＣＩＢ、 ＰＣ２Ｂで構成されている。コンデンサＣ２
と抵抗Ｒ５でコンデンサｃｌを充電する時定数回路を構
成しており、ツェナーダイオードＺＤ、 ）ランジスタ
Ｔ「を合せて検出装置を構成している。ダイオードｏＩ
、 Ｄ２． Ｄ３．発光ダイオードＬＥＤ、リレーＲＹ
で離接機構を構成している。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a connection diagram showing a transmission device according to this embodiment. In FIG. 1, the transmission bus 30 is composed of a transmission power line 31.34, a transmission signal line 32.35, and a ground line 33.36. A transmission power supply 60 is connected. The transmission power lines 31 and 34 are connected via the b contact RYbl of the relay, and the transmission signal line 3
2 and 35 are connected via the b contact RYb2 of the relay. DI and D2 indicate diodes, Rl,
R2, R3, and R4 indicate resistance. PCIA, P.
C2A indicates a light emitting portion of a photocoupler connected between the transmission signal line 32.35 and the ground line 33.36 via resistors R2 and R4. In the case of this embodiment, the discrimination circuit includes resistors R1゜R2, R3, R4, R6, the light emitting parts PCIA and PC2A of the photocoupler, and the switching part P of the photocoupler.
It consists of CIB and PC2B. Capacitor C2
and resistor R5 constitute a time constant circuit that charges the capacitor cl, and a Zener diode ZD and ) transistor T constitute a detection device.Diode oI
, D2. D3. Light emitting diode LED, relay RY
constitutes the detachment mechanism.
次に動作について説明する。正常時には、伝送信号線３
２と３５はリレー接点ＲＹｂ２によって接続されており
、伝送信号により電圧は高−低の変化をしている。この
ため、ホトカブラの発光部ＰＣ１＾、 ＰＣ２Ａは０Ｎ
−ＯＦＦの動作を繰り返しており、これに対応するホト
カブラのスイッチング部ＰＣ−ＩＢ、 ＰＣ−２８の０
Ｎ−ＯＦＦ動作により、コンデンサ自は放電される。Next, the operation will be explained. During normal operation, transmission signal line 3
2 and 35 are connected by a relay contact RYb2, and the voltage changes from high to low depending on the transmission signal. Therefore, the light emitting parts PC1^ and PC2A of the photocoupler are 0N.
-OFF operation is repeated, and the corresponding photocoupler switching parts PC-IB and PC-28 are set to 0.
The capacitor itself is discharged by the N-OFF operation.
コンデンサＣ１の両端の電位差は抵抗Ｒ５による充電時
定数を放電時定数より長くなるように設定して、ツェナ
ー電圧以上に上昇することをなくし、トランジスタＴｒ
は常にＯＦＦの状態になっている。伝送信号線３２側に
短絡故障が発生した場合、ホトカブラのスイッチ°ング
部ＰＣＩＢ、 ＰＣ２Ｂはｏｐｐの状態となり、コンデ
ンサＣｌは放電されなくなる。コンデンサＣ１に抵抗Ｒ
５を通して充電されていき、コンデンサＣ１の両端の電
位差は、コンデンサＣ１の容■に抵抗Ｒ５の抵抗値を乗
じた値で決定される時定数に従った時間的変化によって
上昇する。ツェナーダイオードＺＤのツェナー電圧をこ
のコンデンサＣ１の両端の電位差が越えると、トランジ
スタＴｒはＯＮの状態になる。このトランジスタＴｒが
ＯＮの状態になると、リレーＲＹが動作し、接点ＲＹｂ
ｌ、 ＲＹｂ２を開き伝送バスからそれぞれ切り離され
る。接点ＲＹｂ２は開放されることにより伝送信号線３
５の方は正常となり、ホトカブラＰＣ２ＢはＯＮの状態
となる。しかし伝送信号線３２の方が短絡状態が続く限
り、ホトカブラＰＣＩＢはＯＦＦの状態が続くためリレ
ーＲＹとともに駆動される発光ダイオードＬＥＤにより
表示される。The potential difference across the capacitor C1 is set so that the charging time constant by the resistor R5 is longer than the discharging time constant to prevent the voltage from rising above the Zener voltage.
is always in the OFF state. If a short-circuit failure occurs on the transmission signal line 32 side, the switching parts PCIB and PC2B of the photocoupler will be in the OPP state, and the capacitor Cl will not be discharged. Resistor R to capacitor C1
The potential difference across the capacitor C1 increases with time according to a time constant determined by the capacitance of the capacitor C1 multiplied by the resistance value of the resistor R5. When the potential difference across the capacitor C1 exceeds the Zener voltage of the Zener diode ZD, the transistor Tr is turned on. When this transistor Tr is turned on, relay RY operates and contact RYb
1 and RYb2 are opened and disconnected from the transmission bus. When the contact RYb2 is opened, the transmission signal line 3
5 is normal, and the photocoupler PC2B is in the ON state. However, as long as the transmission signal line 32 remains short-circuited, the photocoupler PCIB remains OFF, so that the light emitting diode LED driven together with the relay RY provides an indication.
また、伝送電源線３１の方が短絡した場合も同様に動作
する。この時の短絡時初期の駆動用電源はコンデンサＣ
２より供給されるが、リレー接点ＲＹｂｌが開くと伝送
電源線３４の方は正常電圧を回復し、ダイオードＤ１を
通して池の駆動用電源が供給される。伝送電源線３１の
方の短絡が継続していればリレーＲＹは動作し続け、故
障した伝送バスは切り離された状態を維持する。故障が
復旧して伝送３１．３２、３４．３５がそれぞれ正常に
なればリレーＲＹがＯＦＦの状態となり接点ＲＹｂｌ、
ＲＹｂ２はそれぞれ閉じる。Furthermore, the same operation occurs when the transmission power line 31 is short-circuited. At this time, the initial driving power supply at the time of short circuit is capacitor C.
However, when the relay contact RYbl opens, the transmission power line 34 recovers its normal voltage, and power for driving the pond is supplied through the diode D1. If the short circuit on the transmission power line 31 continues, the relay RY continues to operate, and the failed transmission bus remains disconnected. When the fault is restored and transmissions 31.32 and 34.35 become normal, relay RY is turned off and contacts RYbl,
RYb2 each closes.
第２図は伝送バスをループ状に形成した場合についての
適用例を示す。ループ状に形成された伝送バス３０に複
数個の本装置１０を設置したものであり、伝送バスはＡ
、 Ｂ、 Ｃ，Ｄ、 Ｈの地域に分割されており短絡故
障から保護され、一部の故障が他の地域に波及しない構
成となっている。FIG. 2 shows an example of application in which the transmission bus is formed in a loop shape. A plurality of devices 10 are installed on a transmission bus 30 formed in a loop shape, and the transmission bus is A.
, B, C, D, and H, and are protected from short-circuit failures, so that failures in some areas do not spread to other areas.
［発明の効果］
以上のように、この発明によれば検出装置を設けること
により伝送バスの短絡故障などを検出し、故障箇所のあ
る線路のみを伝送バスより切り離すように構成したもの
で、一部の故障が全体に広がらない信頼性の高い伝送シ
ステムが構成できる。[Effects of the Invention] As described above, according to the present invention, a detection device is provided to detect short-circuit failures in the transmission bus, and only the line where the failure occurs is disconnected from the transmission bus. It is possible to construct a highly reliable transmission system in which a failure in one part does not spread throughout the system.
第１図はこの発明の一実施例による信号伝送装置を示す
接続図、第２図はこの発明の他の実施例を示す概略構成
図、第３図は従来の伝送システムの接続図である。
ｌは判別回路、２は検出装置、３は離接機構、３１と３
４は伝送電源線、３２と３５は伝送信号線である。
なお、各図中同一符号は同一、または相当部分を示す。FIG. 1 is a connection diagram showing a signal transmission device according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing another embodiment of the invention, and FIG. 3 is a connection diagram of a conventional transmission system. 1 is a discrimination circuit, 2 is a detection device, 3 is a separation mechanism, 31 and 3
4 is a transmission power line, and 32 and 35 are transmission signal lines. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
に接続され、それぞれの線路の異常状態を判別する判別
回路、 判別回路に接続され異常状態の時間の検出をする検出装
置、 検出装置よりの出力により接続している伝送電源線間及
び伝送信号線間をそれぞれ離接する離接機構、 を具備することを特徴とする信号伝送装置。(1) Discrimination circuit that is connected to the transmission power line and transmission signal line in a multi-drop method and determines the abnormal condition of each line, a detection device that is connected to the discrimination circuit and detects the time of the abnormal condition, and A signal transmission device comprising: a separation mechanism that separates and separates transmission power lines and transmission signal lines connected by output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161820A JPH06105909B2 (en) | 1988-06-28 | 1988-06-28 | Signal transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161820A JPH06105909B2 (en) | 1988-06-28 | 1988-06-28 | Signal transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0210935A true JPH0210935A (en) | 1990-01-16 |
| JPH06105909B2 JPH06105909B2 (en) | 1994-12-21 |
Family
ID=15742529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63161820A Expired - Lifetime JPH06105909B2 (en) | 1988-06-28 | 1988-06-28 | Signal transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06105909B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6385166B1 (en) | 1997-07-23 | 2002-05-07 | Denso Corporation | Multiplex communication system |
| WO2011121742A1 (en) * | 2010-03-30 | 2011-10-06 | トヨタ自動車株式会社 | Drive control device for hybrid vehicle |
-
1988
- 1988-06-28 JP JP63161820A patent/JPH06105909B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6385166B1 (en) | 1997-07-23 | 2002-05-07 | Denso Corporation | Multiplex communication system |
| WO2011121742A1 (en) * | 2010-03-30 | 2011-10-06 | トヨタ自動車株式会社 | Drive control device for hybrid vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06105909B2 (en) | 1994-12-21 |
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