JPS6260334A - Method and equipment for switching multiplex transmission line - Google Patents

Method and equipment for switching multiplex transmission line

Info

Publication number
JPS6260334A
JPS6260334A JP60199439A JP19943985A JPS6260334A JP S6260334 A JPS6260334 A JP S6260334A JP 60199439 A JP60199439 A JP 60199439A JP 19943985 A JP19943985 A JP 19943985A JP S6260334 A JPS6260334 A JP S6260334A
Authority
JP
Japan
Prior art keywords
transmission line
station
transmission
reception
self
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
Application number
JP60199439A
Other languages
Japanese (ja)
Other versions
JPH0568901B2 (en
Inventor
Sumihisa Saitou
純寿 斉藤
Akihiro Wakita
脇田 章弘
Kazuhiko Shimoyama
和彦 下山
Yasuhiro Amahi
天日 康博
Hiromasa Yamaoka
弘昌 山岡
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.)
Hitachi Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
Hitachi 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 Hitachi Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP60199439A priority Critical patent/JPS6260334A/en
Publication of JPS6260334A publication Critical patent/JPS6260334A/en
Publication of JPH0568901B2 publication Critical patent/JPH0568901B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE:To improve the maintenance maintenance property and reliability by sending simultaneously a data to all multiplex system transmission lines to apply self-diagnosis in case of transmission, disconnecting a transmission line if it is decided that the inside of its own station has an error and receiving the data only from a transmission line decided as normal in case of the reception. CONSTITUTION:A data sent to transmission lines 10, 11 is subjected to normality/ abnormity decision by a deciding circuit 52. Then the result of decision is sent to a transmission line diagnostic circuit 58 to repeat the diagnosis of the transmission line. When the fault is detected, the relay of the corresponding transmission line side is opened to apply self-diagnosis in its own station. As a result, when it is normal, the relay is reconnected and when an error still exists, the relay remains disconnected as it is. The data on the transmission line 10 is received via a reception circuit 52, the normality/abnormity decision of the reception data is applied in the deciding circuit 52, and only when the data is normal as the result of decision, a timer 53 is reset. When normal reception is not executed, the timer 53 is not reset and the changeover command of the reception line is given to a reception line indicator 57.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、多重系伝送路の切替方法及び装置に関するも
のである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method and apparatus for switching multiplex transmission lines.

〔発明の背景〕[Background of the invention]

複数のステーション間の通信手段として2ステーション
追加、伝送路変更の容易性などを目的として4一対の伝
送路に全てのステーションを接続して情報の伝送を行う
方法が広く用いられている。
As a means of communication between a plurality of stations, a method is widely used in which all stations are connected to four pairs of transmission paths to transmit information, for the purpose of adding two stations or easily changing transmission paths.

この方法においては、全ての情報が一対の伝送路を通し
て伝送されるため、伝送路自体の故障またはステーショ
ンの送受信部の故障が伝送路全体に影響を及ぼし、全て
の情報伝送が不可能となり。
In this method, all information is transmitted through a pair of transmission lines, so a failure in the transmission line itself or a failure in the transceiver section of the station affects the entire transmission line, making it impossible to transmit all information.

システムダウンとなる危険性がある。There is a risk that the system will go down.

この危険性を回避する手段として、複数の伝送路を設け
、伝送路が故障した時に伝送路を切替えて情報伝送を継
続する方法が行なわれる。
As a means to avoid this risk, a method is used in which a plurality of transmission lines are provided and when a transmission line fails, the transmission line is switched to continue information transmission.

この切替方式に関し従来は1例えば、特公昭57−26
027号公報記載のものがある。この方式を第6図をも
とに説明する。ステーション1は。
Regarding this switching method, conventionally 1, for example,
There is one described in Publication No. 027. This method will be explained based on FIG. Station 1 is.

信号の受信と送信を夫々行うレシーバ23とドライバ2
2.信号の並列直列変換、一時記憶など行う伝送回路2
4.伝送信号の有無を常時監視する監視切離回路26.
端末計算機25.カウンタ27、レジスタ28などによ
構成る。そして、伝送路10より20.21,23.2
4を介して25へ、また25より24.22,21.2
0を介して10へ送受信される。ここで通常はリレー2
0はM側に閉じておシ、ステーション1は、伝送路11
と完全に切離されている。
Receiver 23 and driver 2 that receive and transmit signals, respectively
2. Transmission circuit 2 that performs parallel-serial conversion of signals, temporary storage, etc.
4. A monitoring disconnection circuit 26 that constantly monitors the presence or absence of a transmission signal.
Terminal computer 25. It is composed of a counter 27, a register 28, and the like. Then, from the transmission line 10, 20.21, 23.2
4 to 25, and from 25 24.22, 21.2
0 to 10. Here normally relay 2
0 is closed to the M side, and station 1 is connected to the transmission line 11.
completely separated from.

監視切離回路26は、あらかじめ定められた時間内に伝
送信号が送られてこない場合に内部のタイマがリセット
できず、リレー21を切離し6伝送部の自己診断を行う
。ここで伝送部の故障が発見されるとリレー21は切離
したままとなる。自己診断の結果伝送部の故障でない場
合は再びリレー21を接続する。この時、他ステーショ
ンの伝送部の故障であった場合は、該ステーションが切
離されているため伝送路10により伝送が継続で′・き
る。一方、伝送路10自体の故障である場合は□ 再び
監視切離回路26により、リレー21は切離される。リ
レー21を切離し、接続の回数をカウンタ27は計数し
、その計数値が一定回数以上となると、伝送路10自体
の故障と断定し、レジスタ28にトリガをかけ、リレー
20をM側からS側に切替える。この時初めて伝送路1
1がステーション1と接続され、伝送路10とステーシ
ョン1は完全に切離される。
The monitoring disconnection circuit 26 cannot reset the internal timer if a transmission signal is not sent within a predetermined time, disconnects the relay 21, and performs a self-diagnosis of the 6 transmission sections. If a failure in the transmission section is discovered here, the relay 21 remains disconnected. If the self-diagnosis shows that there is no failure in the transmission section, the relay 21 is connected again. At this time, if there is a failure in the transmission section of another station, the transmission can be continued via the transmission line 10 because that station is disconnected. On the other hand, if there is a failure in the transmission line 10 itself, the relay 21 is disconnected again by the monitoring disconnection circuit 26. The counter 27 counts the number of times the relay 21 is disconnected and connected, and when the counted value exceeds a certain number of times, it is determined that the transmission line 10 itself has failed, a trigger is applied to the register 28, and the relay 20 is moved from the M side to the S side. Switch to. At this time, for the first time, transmission line 1
1 is connected to station 1, and transmission line 10 and station 1 are completely separated.

この方式は、2重の伝送路を設け、一方を主系として通
常は主系のみを使用し、他方は待機系として完全に休止
状態にあり、主系が故障を起こした時、主系に代わって
待機系を伝送に使用するものである。しかし、待機系が
休止状態にあり、その故障が検出できないため、待機系
の保全ができず、待機系がすでに故障だった場合は主系
の故障でシステムダウンとなる危険性がある。
In this method, a double transmission line is installed, one is the main system, and normally only the main system is used, while the other is completely dormant as a standby system, and when the main system fails, the main system Instead, the standby system is used for transmission. However, since the standby system is in a dormant state and its failure cannot be detected, the standby system cannot be maintained, and if the standby system has already failed, there is a risk that the main system will fail and the system will go down.

待機系を診断する方法として、(1)診断月別回路を設
ける方法、(2)定期的に主系、待機系を切替えて診断
する方法が考えられるが、(1)の場合は・・−ドウエ
アが増加するという問題点があり、(2)の場合は全ス
テーションが同一伝送路を選択してなければ通信できな
いために切替手順が複雑となり。
Possible methods for diagnosing the standby system include (1) providing a monthly diagnostic circuit, and (2) periodically switching between the main and standby systems for diagnosis.In the case of (1)... In the case of (2), communication is not possible unless all stations select the same transmission path, which complicates the switching procedure.

また、切替えのたびにシステムに外乱を与える恐れがあ
る。
Furthermore, there is a possibility that disturbance may be caused to the system every time the switching is performed.

また、その他の問題として次のものがある。第7図は第
6図に示した従来例ステーション間の接続状態を示した
ものであり、伝送路10,11、ステーション2,3,
4. リレー30,31゜32より構成される。いま、
伝送路10が主系であり、伝送路10の35または36
の箇所で断線したと仮定する。この場合、ステーション
2は伝送路10自体の故障と判断しリレー30をS側に
切替えるのに対し、ステーション3,4は伝送路10自
体の故障と判断せずにリレー31.32はM側のままで
あり、そのためステーション1とステーション2.3間
の通信が遮断するという問題が生じる。
In addition, there are other issues as follows. FIG. 7 shows the connection state between the conventional stations shown in FIG.
4. It is composed of relays 30, 31 and 32. now,
Transmission line 10 is the main system, and 35 or 36 of transmission line 10
Assume that the wire is broken at the point. In this case, station 2 determines that the transmission line 10 itself is at fault and switches the relay 30 to the S side, whereas stations 3 and 4 do not determine that the transmission line 10 itself is at fault and switch relays 31 and 32 to the M side. Therefore, the problem arises that communication between station 1 and station 2.3 is interrupted.

なお2以上述べた問題は全て、伝送路が3重系以上の複
数あった場合であっても、同様に存在することは明白で
ある。
It is clear that all of the above-mentioned problems also exist even when there are multiple transmission paths, such as triple or more.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、藺導な回路および手順でたえず全伝送
路の診断を行ない保全性を向上させ、また、伝送路上の
いかなる障害であってもそれを検出して伝送路の切替え
を行なう多重系伝送路切替方法及び装置を提供すること
にある。
The purpose of the present invention is to continuously diagnose all transmission lines using an intuitive circuit and procedure to improve the integrity of the transmission line, and to detect any fault on the transmission line and switch the transmission line. An object of the present invention is to provide a system transmission line switching method and device.

〔発明の概要〕[Summary of the invention]

本発明は6自己ステーションか送信する場合には全多重
系伝送路に同時送信し、送信したデータを伝送路1つず
つ選択して自己診断し、自己ステーション内の異常と判
断した場合は、該伝送路を切離したままとし、自己ステ
ーションが正常と判断した場合は該伝送路と自己ステー
ションを再接続し、自己ステーションが受信する場合に
は前記自己診断により正常と判断された伝送路からのみ
受信を行々う多重系伝送路の切替方法及びその方法を実
施するための装置である。
In the case of transmitting from 6 self-stations, the present invention simultaneously transmits to all multiplex transmission paths, selects the transmitted data one transmission path at a time, performs self-diagnosis, and if it is determined that there is an abnormality within the self-station, the corresponding The transmission line remains disconnected, and if the own station determines that it is normal, the transmission line and the own station are reconnected, and when the own station receives data, it receives only from the transmission line that was determined to be normal by the self-diagnosis. The present invention is a method for switching multiplex transmission lines and an apparatus for implementing the method.

〔発明の実m例〕[Example of invention]

以下本発明の実施例を図面により説明する。第1図は本
発明による多重系伝送路の構成である。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a multiplex transmission line according to the present invention.

ステーション5は、信号の送信を行うドライバ42.4
3.信号の受信を行うレシーバ45.信号の並列直列変
換を行う送信回路50.信号の直列並列変換を行う受信
回路51.受信の正常/異常を判定する判定回路52.
リビー44を制御する受信路指示器57.リレー40.
41.44を制御する伝送路診断回路58.タイマ53
.カウンタ54,55.56などよ構成る。インバータ
46は、自己ステーションが送信時においては伝送路診
断回路58に対してリレー44に対する制御権を与え、
自己ステーションが受信時においてけ受信路指示器57
に対してリレー44に対する制御権を与えるものである
The station 5 includes a driver 42.4 that transmits signals.
3. Receiver 45 for receiving signals. A transmitting circuit 50 that performs parallel-to-serial conversion of signals. A receiving circuit 51 that performs serial-to-parallel conversion of signals. A determination circuit 52 that determines whether reception is normal or abnormal.
Reception path indicator 57 that controls Libby 44. Relay 40.
Transmission line diagnostic circuit 58 that controls 41.44. timer 53
.. It consists of counters 54, 55, 56, etc. The inverter 46 gives control authority over the relay 44 to the transmission path diagnostic circuit 58 when the own station is transmitting,
Receive path indicator 57 for self-station when receiving
control authority over the relay 44.

まず、自己ステーションから送信する場合の動作を説明
する。送信データは送信回路50.  ドライバ42.
リレー40を介して伝送路lo上に送信すると同時にド
ライバ43.リレー41を介して伝送路11上へも送信
する。また、伝送路へ送信されるデータは、自己ステー
ション内のりレー44、レシーバ45.受信回路51を
介して判定回路52に送られ、ここでデータの正常/異
常判定が行なわれる。そして判定結果は、伝送路診断回
路58へ送られる。伝送路診断回路58は、伝送路10
(リレー入側)と伝送路11(リレーB側)を交互に選
択しながら伝送路の診断を繰り返す。そして2異常を検
出した場合は、リレー40゜41のうち該当する伝送路
側のリレーを切離して自己ステーション内の自己診断を
行い、その結果。
First, the operation when transmitting from one's own station will be explained. The transmission data is sent to the transmission circuit 50. Driver 42.
At the same time, the driver 43. It is also transmitted onto the transmission line 11 via the relay 41. Further, data transmitted to the transmission path is transmitted to the relay 44, receiver 45 . The data is sent to the determination circuit 52 via the reception circuit 51, where it is determined whether the data is normal or abnormal. The determination result is then sent to the transmission path diagnosis circuit 58. The transmission line diagnostic circuit 58
Diagnosis of the transmission path is repeated while alternately selecting transmission path 11 (relay input side) and transmission path 11 (relay B side). If 2 abnormalities are detected, the relevant relay on the transmission line side among the relays 40 and 41 is disconnected and a self-diagnosis is performed within the own station.

正虐ならばリレーを再接続し、異常ならばリレーは切離
したままとする。この結果は、受信路指示器57に送ら
れ、受信路の選択に利用される。
If it is just, reconnect the relay, but if it is abnormal, leave the relay disconnected. This result is sent to the receiving path indicator 57 and used for selecting a receiving path.

次に、自己ステーションが受信する場合の動作を説明す
る。受信路指示器は、伝送路10(リレー入側)か伝送
路11(リレーB側)のどちらか一方を選択している。
Next, the operation when the own station receives will be explained. The reception path indicator selects either transmission path 10 (relay input side) or transmission path 11 (relay B side).

いま、伝送路lOが選択されているとすると、伝送路1
0上のデータがリレー40.リレー44.レシーバ45
.受信回路5.1を介して受信され1判定回路52にお
いて受信・データの正常/異常判定を行い1判定の結果
Assuming that transmission path IO is selected now, transmission path 1
The data on 0 is relay 40. Relay 44. Receiver 45
.. The received data is received via the receiving circuit 5.1, and the 1 judgment circuit 52 judges whether the received data is normal or abnormal, and the result of the 1 judgment.

正常のときのみタイマ53をリセットする。タイマ53
はたえず計時しておシ、あらかじめ定められた時間内に
正常受信が行なわれない場合、リセットされず、受信路
指示器57に対して受信路の切替指令を発する。カウン
タ54,55.56は他ステーションと1対1に対応し
ており、他ステーションから正常に受信した場合に対応
するカウンタがゼロクリアされ、受信できない場合にカ
ウントアツプされ、カウンタの内容があらかじめ定めら
れた値と一致したときのみ受信路指示器57に対して受
信路切替指令を発する。
The timer 53 is reset only when normal. timer 53
It constantly measures the time, and if normal reception is not performed within a predetermined time, it is not reset and issues a reception path switching command to the reception path indicator 57. The counters 54, 55, and 56 have a one-to-one correspondence with other stations, and the corresponding counter is cleared to zero when reception is normally received from another station, and is incremented when reception is not possible, and the contents of the counter are predetermined. A reception path switching command is issued to the reception path indicator 57 only when the value matches the received value.

以上の送信時の手順フローを82図に、受信時の手順フ
ローを第3図に示す。
The above procedure flow at the time of transmission is shown in FIG. 82, and the procedure flow at the time of reception is shown in FIG.

ここで、カウンタの動作を第4図によってよシ詳細に説
明する。ステーション5内のカウンタ54.55.56
はそれぞれステーション6.788に対応しているとす
る。いま、ステーション5は伝送路10で受信しておシ
、伝送路10は正常だとすると、カウンタ54,55.
56の値は全てゼロである。この状態を(イ)で示す。
Here, the operation of the counter will be explained in more detail with reference to FIG. Counter 54.55.56 in station 5
Assume that each corresponds to station 6.788. Now, assuming that station 5 is receiving data on transmission line 10 and transmission line 10 is normal, counters 54, 55 .
All 56 values are zero. This state is shown by (a).

ここで、伝送路10が60または610箇所で故障した
とすると、ステーション6からのデータが異常となるか
、または、ステーション6に送信権が与えられているに
もかかわらずデータが送られてこないという事態となる
。第1図の判定回路52はこの事態を検出するとカウン
タ54をカウントアツプ−iる。そして、カウントアツ
プが続くと、カウンタ54は最後に最大値Mとなってカ
ウントアツプが停止する。この状態を(ハ)で示す。途
中、カウンタ54は、カウントaがあらかじめ定められ
た値Xと一致したときのみl@だけ受信路切替指令を発
する。この状態を(ロ)で示す。状態(ロ)のときのみ
受信路を切替えることにより、ノイズ等による不要な切
替えを避けることができる。第1図の受信路指示器57
は、タイマ53およびカウンタ54゜55.56からの
受信路切替指令を記憶しておき。
Here, if the transmission line 10 fails at 60 or 610 points, the data from station 6 will become abnormal, or the data will not be sent even though station 6 has been given the right to transmit. This is the situation. When the determination circuit 52 of FIG. 1 detects this situation, it counts up the counter 54. Then, as the count-up continues, the counter 54 finally reaches the maximum value M, and the count-up stops. This state is shown by (c). During the process, the counter 54 issues a reception path switching command by l@ only when the count a matches a predetermined value X. This state is shown by (b). By switching the receiving path only in state (b), unnecessary switching due to noise or the like can be avoided. Reception path indicator 57 in FIG.
stores the reception path switching commands from the timer 53 and counters 54, 55, and 56.

自己ステーションの送信が終った時点で、伝送路診断回
路58から送られる診断情報にもとづき伝送路の切替え
を行う。故障発生の箇所によっては複数のカウンタから
受信路切替指令が出る場合もあるが、この場合でも切替
は1回のみ行い、受信路が異常伝送路に再切替わること
はない。
When the transmission from its own station is completed, the transmission path is switched based on the diagnostic information sent from the transmission path diagnostic circuit 58. Depending on the location where the failure occurs, reception path switching commands may be issued from a plurality of counters, but even in this case, switching is performed only once, and the reception path will not be switched to the abnormal transmission path again.

以上説明した例は、伝送路が2重系の場合であるが、3
重系以上の場合においても本発明の動作原理は同じであ
シ、同様の効果であることは明白である。本発明の他の
実施例である3重系の例を第5図に示す。本実tIfi
列の場合でも、伝送路診断回路88が伝送路10,11
.12の診断を項番に繰返し、受信路指示器87がその
診断結果にもとづき3つの伝送路の1つを選択すること
を除き。
The example explained above is a case where the transmission path is a dual system, but
It is clear that the operating principle of the present invention is the same even in cases of heavy or higher systems, and the same effects are obtained. FIG. 5 shows an example of a triple system which is another embodiment of the present invention. Real tIfi
Even in the case of transmission lines 10 and 11, the transmission line diagnosis circuit 88
.. 12 is repeated for each item number, except that the reception path indicator 87 selects one of the three transmission paths based on the diagnosis result.

その動作は第1図と同じである、 〔発明の効果〕 本発明によれば、簡単な回路および手順でたえず全伝送
路の診断ができ、tた。伝送路上のいかなる障害であっ
てもそれを検出し伝送路を切替られるので、保全性に優
れ信頼性の高い多重系伝送路が実現できる。
Its operation is the same as that shown in FIG. 1. [Effects of the Invention] According to the present invention, all transmission lines can be constantly diagnosed with simple circuits and procedures. Since any failure on the transmission path can be detected and the transmission path can be switched, a multi-system transmission path with excellent integrity and reliability can be realized.

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

ゝ1 ・第1図は本発明の一実施例の構成図、第2図は第1図
の送信時のフローチャート、第3図は受信時のフローチ
ャート、第4図は第1図のカウンタの動作を説明するた
めの図、第5図は本発明の他の実施例の構成図、第6図
は従来例の構成図、第7図は従来列の問題点を説明する
ための図である。 5.6,7,8.9・・・ステーション、10,11゜
12・・・伝送路、40,41,44,70,71゜7
2・・・リレー、42,43,73,74.75・・・
ドラ″イパ、45,77・・・レシーバ、54,55゜
56.84.85.86・・・カウンタ、50.80・
・・送信回路、51.81・・・受信回路、46.78
・・・インバータ、52.82・・・判定回路、53゜
83・・・タイマ、57.87・・・受信路指示器、5
8゜88・・・伝送路診断回路。
1 - Figure 1 is a block diagram of an embodiment of the present invention, Figure 2 is a flowchart at the time of transmission in Figure 1, Figure 3 is a flowchart at the time of reception, and Figure 4 is the operation of the counter in Figure 1. FIG. 5 is a block diagram of another embodiment of the present invention, FIG. 6 is a block diagram of a conventional example, and FIG. 7 is a diagram for explaining problems with the conventional column. 5.6,7,8.9...Station, 10,11゜12...Transmission line, 40,41,44,70,71゜7
2... Relay, 42, 43, 73, 74.75...
Dryer, 45,77...Receiver, 54,55°56.84.85.86...Counter, 50.80.
...Transmission circuit, 51.81 ...Reception circuit, 46.78
... Inverter, 52.82 ... Judgment circuit, 53°83 ... Timer, 57.87 ... Reception path indicator, 5
8゜88...Transmission path diagnostic circuit.

Claims (1)

【特許請求の範囲】 1、複数のステーション間を多重系伝送路で接続し、該
伝送路に異常が発生した場合には他の伝送路に切替えて
伝送を継続する多重系伝送路切替方法において、自己ス
テーションが送信する場合には全多重系伝送路に同時送
信し、該送信したデータを伝送路1つずつ選択して自己
診断し、自己ステーション内の異常と判断した場合は、
該伝送路を切離したままとし、自己ステーションが正常
と判断した場合は該伝送路と自己ステーションを再接続
し、自己ステーションが受信する場合には前記自己診断
により正常と判断された伝送路からのみ受信を行うこと
を特徴とする多重系伝送路切替方法。 2、複数のステーション間を多重系伝送路で接続し、該
伝送路に異常が発生した場合には他の伝送路に切替えて
伝送を継続する多重系伝送路切替装置において、多重系
伝送路の1つを選択して受信する第1の手段と、夫々の
多重系伝送路ごとに伝送路から自己ステーションを切離
す第2の手段と、自己ステーションが送信する場合には
自己診断を行い、自己ステーション内の異常と判断した
場合は第2の手段により該伝送路を切離したままとし、
自己ステーションが正常と判断した場合は該伝送路と自
己ステーションを再接続して、全多重系伝送路に対して
順次診断を行う第3の手段と、自己ステーションが受信
する場合には第3の手段による診断により正常と判断さ
れた伝送路から受信を行う第4の手段とを夫々のステー
ションに備え、送信は全多重系伝送路に対して行い、受
信は正常と判断された伝送路のみ行うことを特徴とする
多重系伝送路切替装置。 3、特許請求の範囲第2項記載において、前記夫夫のス
テーションに、複数のステーションと1対1に対応する
複数のカウンタを有し、他ステーションから受信した場
合に対応するカウンタをゼロクリアし、受信できない場
合にカウントアップし、該カウンタがあらかじめ定めら
れた値と一致した時にのみ受信路を切替える手段を備え
たことを特徴とする多重系伝送路切替装置。 4、特許請求の範囲第2項記載において、前記夫夫のス
テーションに、複数のタイマを有し、受信した場合およ
び受信路を切替えた場合にリセットし、それ以外の時は
計時を行い、あらかじめ定められた時間内に受信が行な
われない場合に該タイマがタイムアップして受信路を切
替える手段を備えたことを特徴とする多重系伝送路切替
装置。
[Claims] 1. A multiplex transmission line switching method in which a plurality of stations are connected by a multiplex transmission line, and when an abnormality occurs in the transmission line, switching to another transmission line and continuing transmission. When the self-station transmits, it simultaneously transmits to all multiplex transmission paths, selects the transmitted data one transmission path at a time, performs self-diagnosis, and if it is determined that there is an abnormality within the self-station,
The transmission line remains disconnected, and if the own station determines that the transmission line is normal, the transmission line and the own station are reconnected, and when the own station receives data, only from the transmission line determined to be normal by the self-diagnosis. A multiplex transmission line switching method characterized by performing reception. 2. In a multiplex transmission line switching device that connects multiple stations with a multiplex transmission line, and if an abnormality occurs in the transmission line, switches to another transmission line and continues transmission. A first means for selecting and receiving one station, a second means for separating the self-station from the transmission path for each multiplex transmission path, and a self-diagnosis is performed when the self-station transmits. If it is determined that there is an abnormality within the station, the transmission line is kept disconnected by the second means,
If the self-station determines that the self-station is normal, the third means reconnects the transmission path and the self-station and sequentially diagnoses all the multiplex transmission paths; Each station is equipped with a fourth means for receiving from a transmission path determined to be normal by the diagnosis by the means, and transmission is performed for all multiplex transmission paths, and reception is performed only for the transmission path determined to be normal. A multi-system transmission line switching device characterized by the following. 3. In claim 2, the husband's station has a plurality of counters in one-to-one correspondence with a plurality of stations, and when receiving from another station, the corresponding counter is cleared to zero, A multi-system transmission line switching device characterized by comprising means for counting up when reception is not possible and switching the reception line only when the counter matches a predetermined value. 4. In claim 2, the husband's station has a plurality of timers, which are reset when reception is received or when the reception path is switched, and are timed at other times. 1. A multi-system transmission path switching device comprising means for switching a reception path when the timer times out when reception is not performed within a predetermined time.
JP60199439A 1985-09-11 1985-09-11 Method and equipment for switching multiplex transmission line Granted JPS6260334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60199439A JPS6260334A (en) 1985-09-11 1985-09-11 Method and equipment for switching multiplex transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60199439A JPS6260334A (en) 1985-09-11 1985-09-11 Method and equipment for switching multiplex transmission line

Publications (2)

Publication Number Publication Date
JPS6260334A true JPS6260334A (en) 1987-03-17
JPH0568901B2 JPH0568901B2 (en) 1993-09-29

Family

ID=16407833

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60199439A Granted JPS6260334A (en) 1985-09-11 1985-09-11 Method and equipment for switching multiplex transmission line

Country Status (1)

Country Link
JP (1) JPS6260334A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138198U (en) * 1988-03-17 1989-09-21
US5666146A (en) * 1991-05-27 1997-09-09 Seiko Epson Corporation Ink cartridge for ink jet recording apparatus
US6264314B1 (en) 1991-05-27 2001-07-24 Seiko Epson Corporation Ink cartridge for ink jet recording apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138198U (en) * 1988-03-17 1989-09-21
US5666146A (en) * 1991-05-27 1997-09-09 Seiko Epson Corporation Ink cartridge for ink jet recording apparatus
US6264314B1 (en) 1991-05-27 2001-07-24 Seiko Epson Corporation Ink cartridge for ink jet recording apparatus

Also Published As

Publication number Publication date
JPH0568901B2 (en) 1993-09-29

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