JPS59218062A - Data transmission equipment - Google Patents
Data transmission equipmentInfo
- Publication number
- JPS59218062A JPS59218062A JP9284583A JP9284583A JPS59218062A JP S59218062 A JPS59218062 A JP S59218062A JP 9284583 A JP9284583 A JP 9284583A JP 9284583 A JP9284583 A JP 9284583A JP S59218062 A JPS59218062 A JP S59218062A
- Authority
- JP
- Japan
- Prior art keywords
- data transmission
- data
- transmission
- transmission line
- equipment
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はデータ伝送装［Ｋ関し、特に直流結合のバス型
式データ伝送システムに用いるデータ伝送装置に関する
、
〔従来技術と問題点〕
優れた分散処理システムを構築するためには効率と信頼
性の旨いデータ伝送システムが必要である。単一の伝送
路に複数の装置を接続Ｊるバス型式のデータ伝送システ
ムは構成が簡単で安価に実現できるので各種端末装置や
パーソナルコンピュータからなる分散処理システムで良
く使イつれている。このバス型式のデータ伝送システム
の内、直流結合型の伝送システムは多数の装置Ｉｔを女
両に接続出来るという優れた特長を持っている。しかし
ながら送受信回路が互いに直流結合しているのでいずれ
かの装置が故障して信号を送り続けた場合に故障した装
置を特定するためには多大な労力を要する。特に送信回
路が破損してその出力回路が短絡状態になると、故障し
た装置の電源を切っても伝送路の信号線と接地線とは短
絡状態なのでどの装置が故障しているかを判別するのが
困難である。このように従来のバス型式データ伝送シス
テムでは接続された複数の装置の内１台でも故障したと
きシステム全体の復旧に多大な労力を資するという欠点
があった。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a data transmission device [K], and particularly relates to a data transmission device used in a DC-coupled bus type data transmission system. [Prior Art and Problems] Excellent distributed processing In order to build a system, an efficient and reliable data transmission system is required. A bus-type data transmission system in which a plurality of devices are connected to a single transmission path is simple in configuration and can be realized at low cost, so it is often used in distributed processing systems consisting of various terminal devices and personal computers. Among these bus-type data transmission systems, the direct current coupling type transmission system has the excellent feature of being able to connect a large number of devices It. However, since the transmitting and receiving circuits are DC-coupled to each other, if one of the devices fails and continues to send signals, it requires a great deal of effort to identify the failed device. In particular, if the transmission circuit is damaged and its output circuit is short-circuited, it is difficult to determine which device is faulty because the signal line and ground wire of the transmission line are short-circuited even if the power to the faulty device is turned off. Have difficulty. As described above, the conventional bus-type data transmission system has the disadvantage that when even one of the plurality of connected devices fails, a great deal of effort is required to restore the entire system.
本発明の目的は、直流的に結合されたバス型式データ伝
送システムにおいて用いられるデータ伝送装置で伝送路
と送受信回路との接続／切離しを該装置の電源投入／切
断と連動させることによって上記欠点を除去し、故障装
置の識別を容易にしたデータ伝送装置を提供することに
ある。An object of the present invention is to solve the above-mentioned drawbacks in a data transmission device used in a DC-coupled bus-type data transmission system by linking connection/disconnection of a transmission line and a transmitting/receiving circuit with turning on/off the power of the device. An object of the present invention is to provide a data transmission device in which a faulty device can be easily identified.
本発明によれば、複数のデータ伝送装置を単一の伝送路
で相互接続するバス型式のデータ伝送システムにおいて
、データの制御および処理を行う論理部と、データの送
受信を行う送受信回路と。According to the present invention, in a bus-type data transmission system in which a plurality of data transmission devices are interconnected through a single transmission path, there is provided a logic unit that controls and processes data, and a transmitting/receiving circuit that transmits and receives data.
装置′電源が投入されているときおよび投入されていな
いときに応じてそれぞれ前記送受信回路と伝送路との映
続および切離しを行う切替回路とを備えることを特徴と
するデータ伝送装置が得られる。There is obtained a data transmission device characterized in that the device is provided with a switching circuit that connects and disconnects the transmitter/receiver circuit and the transmission line depending on whether the power is turned on or not.
次に本発明について図面を参照して詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.
第１図は本発明のデータ伝送装置を用いた直流結合型の
バス型式データ伝送システムの構成例を示すブロック図
である。同図において、データ伝送装置１． ２． ３
は単一の伝送線路４で接続され相互にデータ送受信を行
う。なお前記伝送線路４は終端抵抗５，６により終端さ
れる。FIG. 1 is a block diagram showing a configuration example of a DC coupled bus type data transmission system using the data transmission device of the present invention. In the figure, data transmission device 1. 2. 3
are connected by a single transmission line 4 and mutually transmit and receive data. Note that the transmission line 4 is terminated by terminating resistors 5 and 6.
次に第２図は本発明のデータ伝送装置の一実施例を示す
回ｂ１３フロック図である。同図において。Next, FIG. 2 is a circuit b13 block diagram showing an embodiment of the data transmission device of the present invention. In the same figure.
データ伝送装置は伝送呵路４（第１図に図示）との接続
端子１０と、この接続端子１０に接続され該データ伝送
装置の通電時に接点を閉じる継磁器１１と、この継・１
器１１と接続された送信回路１２および受信回路１３と
、データを制御および処理する論理部１４とから構成さ
れ、従来のデータ伝送装置に前記継磁器１１を付加した
ものである。該データ伝送装置に通電している時には前
記継電器１１の接点は閉じており該データ伝送装置は前
記伝送線路４と電気的に接続されている。従って彫１図
に示した本発明のデータ伝送装置を用いたバス型式デー
タ伝送システムでは、通電状態にあるデータ伝送装置だ
けが相互に接続されており、該データ伝送装置６：の電
源供給を断つと前記継電器１１の接点は開くので前記伝
送線路４とは電気的に切り離されてしまう。すなわちデ
ータ伝送装置の電源スイッチを操作することにより、こ
れと連動して該≠−タ伝送装置を伝送路から切り離した
り、接続したりすることが出来る。一般にバス型式デー
タ伝送システムにおいていずれかのデータ伝送装置が故
障した時、例えは送信回路が破損し出力回路が帰線と短
絡状態になったときそのデータ伝送システムに接続され
たデータ伝送装置はすべて通信不能となるが１本発明の
データ伝送装置を用いたデータ伝送システムでは、各デ
ータ伝送装置への電源供給を通信が復旧する迄順次断つ
ことによって故障を起しているデータ伝送装置を見つけ
出すことが出来る。The data transmission device includes a connection terminal 10 with the transmission line 4 (shown in FIG. 1), a relay 11 that is connected to this connection terminal 10 and closes the contact when the data transmission device is energized, and this relay 11.
The relay device 11 is constructed of a transmitting circuit 12 and a receiving circuit 13 connected to the transmitter 11, and a logic section 14 for controlling and processing data, and the relay 11 is added to the conventional data transmission device. When the data transmission device is energized, the contacts of the relay 11 are closed and the data transmission device is electrically connected to the transmission line 4. Therefore, in the bus type data transmission system using the data transmission device of the present invention shown in Fig. 1, only the data transmission devices in the energized state are connected to each other, and the power supply to the data transmission device 6 is cut off. Since the contacts of the relay 11 are opened, it is electrically disconnected from the transmission line 4. That is, by operating the power switch of the data transmission device, the data transmission device can be disconnected from or connected to the transmission line in conjunction with this operation. Generally, when one of the data transmission devices in a bus-type data transmission system breaks down, for example, when the transmission circuit is damaged and the output circuit is shorted to the return line, all data transmission devices connected to that data transmission system are However, in a data transmission system using the data transmission device of the present invention, it is possible to find a faulty data transmission device by sequentially cutting off the power supply to each data transmission device until communication is restored. I can do it.
なお、本実施例は本発明を制限するものではなＧ）。す
なわち切替回路として継磁器を例示したが。Note that this example does not limit the present invention.G). That is, although a relay was illustrated as the switching circuit.
電子スイッチを用い装置電源の操作と連動すみようにし
てもよい。An electronic switch may be used in conjunction with the operation of the device power supply.
以上の説明により明らかなように本発明のデータ伝送装
置によれば、装置電源を順次断つという簡単な操作だけ
で故障装置を見つけ出せるので、保守性の高いバス型式
のデータ伝送システムを構築出来るという効果が生じる
。As is clear from the above explanation, according to the data transmission device of the present invention, a faulty device can be found with a simple operation of sequentially turning off the power to the device, so it is possible to construct a bus-type data transmission system that is highly maintainable. occurs.
第１図は本発明のデータ伝送装置を用いた直流結合型の
バス型式データ伝送システムの構成例を示すブロック図
および第２図は本発明のデータ伝送装置の一実施例を示
す回路ブロック図である。
図において、１．礼 ３・・曲データ伝送装置占、４・
・・・・・伝送ａ路、５，６・・曲終端抵抗、ｌｏ・・
相接続端子、１１・・曲継屯器、１２・・曲送倍回路。
１３・・・・・・受信回路、１４・・・・・・論理部。FIG. 1 is a block diagram showing a configuration example of a DC-coupled bus type data transmission system using the data transmission device of the present invention, and FIG. 2 is a circuit block diagram showing an embodiment of the data transmission device of the present invention. be. In the figure, 1. Thank you 3... Song data transmission device fortune, 4...
...Transmission line a, 5, 6... Track termination resistance, lo...
Phase connection terminal, 11.. tune repeater, 12.. tune multiplier circuit. 13... Receiving circuit, 14... Logic section.
Claims (1)
ス型式のデータ伝送システムにおイテ。 データの制御および処理を行う１１１市理部と、データ
の送受信を行う送受信回路と、装置電源が投入されてい
るときおよび投入されていないときに応じてそれぞれ前
記送受信回路と伝送路との接続および切離しを行う切替
回路とを備えることを特数とするデータ伝送装置＾。[Claims] The present invention is directed to a bus-type data transmission system in which a plurality of data transmission devices are interconnected through a single transmission path. The 111 city science department controls and processes data, the transmitter/receiver circuit transmits and receives data, and the transmitter/receiver circuit connects and transmits the transmission line depending on whether the device is powered on or not. A data transmission device characterized by comprising a switching circuit for disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9284583A JPS59218062A (en) | 1983-05-26 | 1983-05-26 | Data transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9284583A JPS59218062A (en) | 1983-05-26 | 1983-05-26 | Data transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59218062A true JPS59218062A (en) | 1984-12-08 |
Family
ID=14065764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9284583A Pending JPS59218062A (en) | 1983-05-26 | 1983-05-26 | Data transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59218062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61296837A (en) * | 1985-06-26 | 1986-12-27 | Toshiba Corp | Transmission and reception circuit in digital transmission system |
-
1983
- 1983-05-26 JP JP9284583A patent/JPS59218062A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61296837A (en) * | 1985-06-26 | 1986-12-27 | Toshiba Corp | Transmission and reception circuit in digital transmission system |
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