JPS6348211B2 - - Google Patents
Info
- Publication number
- JPS6348211B2 JPS6348211B2 JP9419279A JP9419279A JPS6348211B2 JP S6348211 B2 JPS6348211 B2 JP S6348211B2 JP 9419279 A JP9419279 A JP 9419279A JP 9419279 A JP9419279 A JP 9419279A JP S6348211 B2 JPS6348211 B2 JP S6348211B2
- Authority
- JP
- Japan
- Prior art keywords
- main
- downlink
- slave
- station
- slave station
- 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.)
- Expired
Links
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Selective Calling Equipment (AREA)
- Small-Scale Networks (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は２重連鎖状回線構成の集中監視制御方
式に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a centralized monitoring and control system for a double chain line configuration.
第１図は従来の２重連鎖状回線構成の集中監視
制御方式を示すブロツク図である。この集中監視
制御方式においては、主親局１１と複数の子局１
２1，１２2，…，１２Nを主下り回線１３に並列
に接続し、また従親局１４と複数の子局１２1，
１２2，…，１２Nを従下り回線１５に並列接続し
ており親局が２局、子局がＮ局の２：Ｎ形連鎖状
回線構成となつている。なお、第１図には両親局
１１，１４から子局１２1，１２2，…，１２Nに
信号を伝送する下り回線のみを示している。主親
局１１からみて末端の子局１２Nは、主下り回線
１３の特性インピーダンス（例えば、一般の音声
帯域通信回線の整合インピーダンス600Ω）で終
端し、途中の子局１２1，１２2，…，１２Nは、
特性インピーダンスより大きい値、例えば40〜
50kΩの入力インピーダンス（図中ではＨとして
示してある）となるように設定され、同様に従下
り回線１５についても、子局１２1が整合終端
（600Ω）、子局１２2，１２3，…，１２Nは特性イ
ンピーダンスより大きい入力インピーダンス(H)に
設定されていて、主下り回線１３、従下り回線１
５とも、それぞれ主親局１１、従親局１４から子
局側を見たインピーダンスが特性インピーダンス
にほぼ等しいように構成する。
FIG. 1 is a block diagram showing a conventional centralized monitoring and control system with a double chain line configuration. In this centralized monitoring control system, a main master station 11 and a plurality of slave stations 1
2 1 , 12 2 ,..., 12 N are connected in parallel to the main downlink line 13, and a slave station 14 and a plurality of slave stations 12 1 ,
122 , . Note that FIG. 1 shows only the downlinks that transmit signals from the parent stations 11 and 14 to the slave stations 12 1 , 12 2 , . . . , 12 N. The terminal slave stations 12 N as seen from the main master station 11 terminate at the characteristic impedance of the main downlink line 13 (for example, matching impedance of 600Ω for a general voice band communication line), and the slave stations 12 1 , 12 2 , . . . ,12 N is
A value larger than the characteristic impedance, e.g. 40~
It is set to have an input impedance of 50 kΩ (shown as H in the figure), and similarly for the sub-downlink line 15, the slave station 12 1 has matching termination (600Ω), and the slave stations 12 2 , 12 3 , . . . , 12 N is set to an input impedance (H) larger than the characteristic impedance, and the main downlink line 13 and the secondary downlink line 1
5 are constructed so that the impedance seen from the main master station 11 and the slave station 14, respectively, to the slave station side is approximately equal to the characteristic impedance.
この集中監視制御方式において、いま回線の途
中に回線断のような障害が生じたとすると、断線
個所に近い子局は、反射波のために、受信信号が
きわめて不安定になり、親局との間で正常なデー
タの授受ができなくなる。従つて、このような時
に、当該断線個所を検知するために、親局から順
次子局を呼出し、子局の応答を確認しようとして
も、断線による不応答なのか、他の原因によつて
受信信号が不安定なために応答がないのか区別が
つかなくなる。このように、従来の集中監視制御
方式は、明確に障害個所を確認することができ
ず、保守、点検ならびに信頼性について必ずしも
満足できるものではないという欠点があつた。
In this centralized monitoring and control system, if a fault such as a line break occurs in the middle of the line, the slave stations near the line break will receive extremely unstable signals due to reflected waves, and will not be able to communicate with the master station. Data cannot be exchanged normally between the two. Therefore, in such a case, even if you try to call the slave stations one after another from the master station and check the responses of the slave stations in order to detect the disconnection point, it may be difficult to receive a response due to a disconnection or some other reason. Because the signal is unstable, it becomes difficult to distinguish whether there is no response or not. As described above, the conventional centralized monitoring and control system has the disadvantage that it is not possible to clearly identify the location of a fault, and that maintenance, inspection, and reliability are not always satisfactory.
本発明の目的は、主下り回線の障害個所を従下
り回線を介して検知したのち、主下り回線から従
下り回線に切換接続を行うことにより、上述の欠
点を除去した集中監視制御方式を提供することに
ある。 An object of the present invention is to provide a centralized monitoring and control system that eliminates the above-mentioned drawbacks by detecting a fault in the main downlink via the subdownlink and then switching the connection from the main downlink to the subdownlink. It's about doing.
本発明は、主親局および従親局と複数の子局を
それぞれ主上り回線、従上り回線、主下り回線お
よび従下り回線によつて２重連鎖状回線構成とな
し、正常時には主親局は主下り回線を介して子局
の呼出しを行い、主下り回線に障害が生じた時に
子局はこれを検出して主下り回線から従下り回線
に切換接続する受信回路を設ける。
The present invention configures a main master station, a slave station, and a plurality of slave stations into a double chain line configuration with a main uplink, a secondary uplink, a main downlink, and a secondary downlink, respectively, and when normal, the main master station A receiving circuit is provided to call a slave station via the main downlink, and when a failure occurs in the main downlink, the slave station detects this and switches from the main downlink to the secondary downlink.
子局がその受信回路によつて主下り回線から従
下り回線へ切換接続すると、当該子局と従親局と
がデータの授受を行い得る状態になり、かくして
従親局が当該子局を確認した後で、主親局が複数
の子局へデータの伝送を停止する。
When the slave station switches from the main downlink to the secondary downlink using its receiving circuit, the slave station and slave station become ready to exchange data, and the slave station confirms the slave station. After that, the main master station stops transmitting data to the multiple slave stations.
以下に図面を参照して、本発明を説明する。 The present invention will be explained below with reference to the drawings.
第２図は、本発明による集中監視制御システム
のｉ番目（ｉ＝１，２，…，Ｎ）の子局に関連す
る要部の一構成例を示すブロツク図である。この
集中監視制御方式の全体の構成は、第３図にブロ
ツク図を示しているように、第１図の従来方式と
ほぼ同一であり、従つてその構成要素には同じ参
照符号を付している。なお、第３図においては下
り回線１３，１５以外に子局１２1，１２2，…，
１２Nから両親局１１，１４に信号を伝送する主
上り回線１６、縦上り回線１７も示されている。
第２図に示しているように、子局１２ｉは、主親
局１１あるいは従親局１４からのデータ信号を受
信する下り回線用として、復調器２１ｉ，２２
ｉ、切換接続スイツチ２３ｉ，２４ｉおよび受信
回路２５ｉを有している。復調器２１ｉ，２２ｉ
は、それぞれ主下り回線１３と従下り回線１５に
接続され、主親局１１、従親局１４から伝送され
たデータ信号の復調を行う。スイツチ２３ｉ，２
４ｉは、通常復調器２１ｉを受信回路２５ｉに接
続するが、主下り回線１３に障害が発生して、受
信信号が所定レベル以下になつたり、あるいは何
等かの原因で受信信号が不安定になると、受信回
路２５ｉの指令によつて、復調器２２ｉを受信回
路２５ｉに接続し、子局１２ｉを主回線１３から
従回線１５に切換接続する。なお、受信回路２５
ｉは前述のような受信信号レベルの検出機能のほ
か、集中監視制御用データの受信機能を有してい
る。 FIG. 2 is a block diagram showing an example of the configuration of a main part related to the i-th (i=1, 2, . . . , N) slave station of the centralized monitoring and control system according to the present invention. The overall configuration of this centralized monitoring and control system, as shown in the block diagram of FIG. 3, is almost the same as the conventional system shown in FIG. There is. In addition, in FIG. 3, in addition to the downlinks 13 and 15, slave stations 12 1 , 12 2 , ...,
A main uplink 16 and a vertical uplink 17 for transmitting signals from 12N to the parent stations 11 and 14 are also shown.
As shown in FIG. 2, the slave station 12i has demodulators 21i and 22 for downlink receiving data signals from the main master station 11 or the slave station 14.
i, changeover connection switches 23i, 24i, and a receiving circuit 25i. Demodulators 21i, 22i
are connected to the main downlink line 13 and the secondary downlink line 15, respectively, and demodulate the data signals transmitted from the main master station 11 and the slave station 14. switch 23i, 2
4i normally connects the demodulator 21i to the receiving circuit 25i, but if a failure occurs in the main downlink 13 and the received signal drops below a predetermined level, or if the received signal becomes unstable for some reason. , the demodulator 22i is connected to the receiving circuit 25i, and the slave station 12i is switched from the main line 13 to the slave line 15 according to a command from the receiving circuit 25i. Note that the receiving circuit 25
In addition to the function of detecting the received signal level as described above, i has the function of receiving data for centralized monitoring and control.
この集中監視制御方式において、正常時には主
親局１１が主下り回線１３を介して複数の子局１
２1，１２2，…，１２Nをサイクリツクに順次呼
出し、呼出された子局が主上り回線１６と従上り
回線１７を介して主親局１１と従親局１４にそれ
ぞれデータ信号を送出することによりデータの受
信を行なつている。いま子局１２2と子局１２3の
間で、第３図に示すように、回線断の障害が発生
したとすると、子局１２3，１２4，…，１２Nは、
主親局１１から伝送された呼出し信号を受信でき
なくなる。このため、子局１２3，１２4，…，１
２Nの受信回路２５3，２５4，…，２５Nは、その
受信信号レベルが低下し、スイツチ２３3，２３
４，…，２３Nと２４3，２４4，…，２４Nの切換
指令を出す。その結果、受信回路２５3，２５4，
…，２５Nは、復調器２２3，２２4，…，２２Nを
介して、従下り回線１５に接続されることにな
る。 In this centralized monitoring control system, during normal operation, the main master station 11 connects multiple slave stations 1 via the main downlink 13.
2 1 , 12 2 , . This is how data is received. If a line disconnection failure occurs between the slave stations 12 2 and 12 3 as shown in FIG. 3, the slave stations 12 3 , 12 4 ,..., 12 N will:
It becomes impossible to receive the calling signal transmitted from the main master station 11. Therefore, slave stations 12 3 , 12 4 ,...,1
2N receiving circuits 25 3 , 25 4 , .
4 ,..., 23N and 243,244 ,..., 24N switching commands are issued. As a result, the receiving circuits 25 3 , 25 4 ,
..., 25 N are connected to the secondary downlink 15 via demodulators 22 3 , 22 4 , ..., 22 N.
これにより、主親局１１が子局１２3，１２4，
…，１２Nに対して主下り回線１３を介して呼出
し信号を送出しているにもかかわらず、この呼出
し信号を受信できない子局１２3，１２4，…，１
２Nからはデータ信号の送出がないので、主親局
１１は主上り回線１６を介して子局１２3，１２
４，…，１２Nからのデータ信号を受信できないこ
とにより主下り回線１３のいずれかにおいて断線
障害が発生したと判断して子局の呼出しを中止す
る。なお、断線個所に近い子局１２2が反射波の
ために受信信号が極めて不安定となり主上り回線
１６を介して主親局１１にデータ信号を送出しな
い場合もありえる。従親局１４は、上り回線１７
を介して送られてくる各子局１２1，１２2，…，
１２Nからのデータ信号を監視し、データ信号を
送出しない子局が存在すると主下り回線１３のい
ずれかにおいて断線障害が発生したと判断して従
下り回線１５を介して子局１２1，１２2，…，１
２Nを順次呼出す動作を開始する。従下り回線１
５は、既述のとおり回線のマツチングが予めとら
れているので、子局１２3，１２4，…，１２Nは
従親局１４からの呼出し信号を受信し、主上り回
線１６と従上り回線１７を介して主親局１１と従
親局１４に対してそれぞれデータ信号を送出す
る。これに対して、子局１２1，１２2は主下り回
線１３に接続されたままであるので、従親局１４
からの呼出し信号を受信できず、したがつて主上
り回線１６と従上り回線１７を介して主親局１１
と従親局１４に対してはデータ信号を送出しな
い。これにより、主親局１１と従親局１４は子局
１２1，１２2からの応答がないことにより断線障
害箇所を確認することができる。このようにし
て、主親局１１は障害個所を確認すると搬送波の
送出を停止するので、子局１２1，１２2の受信回
路２５1，２５2がこれを検出して、スイツチ２３
１，２３2，２４1，２４2を付勢し、子局１２1，１
２2も主下り回線１３から従下り回線１５に切換
接続されることになる。従つて、障害が発生する
と、その障害個所を従親局１４が確認したのち、
従親局１４はすべての子局１２1，１２2，…，１
２Nを呼出し、データ信号の授受を実行すること
ができる。 As a result, the main master station 11 connects the slave stations 12 3 , 12 4 ,
..., 12 Although the calling signal is being sent to N via the main downlink 13, the slave stations 12 3 , 12 4 ,..., 1 cannot receive the calling signal.
Since no data signal is sent from 2N , the main master station 11 connects the slave stations 12 3 and 12 via the main uplink 16.
4 ,..., 12N , it is determined that a disconnection fault has occurred in one of the main downlink lines 13, and the calling of the slave station is canceled. Note that there is a possibility that the received signal of the slave station 12 2 near the disconnection point is extremely unstable due to reflected waves, and the data signal is not sent to the main master station 11 via the main uplink line 16 . The slave station 14 has an uplink 17
Each slave station 12 1 , 12 2 , ..., sent via
12 N , and if there is a slave station that does not send a data signal, it is determined that a disconnection failure has occurred in one of the main downlink lines 13, and the slave stations 12 1 , 12 are sent via the secondary downlink line 15. 2 ,…,1
2 Start calling N sequentially. Secondary down line 1
5, the lines are matched in advance as described above, so the slave stations 12 3 , 12 4 , ..., 12 N receive the paging signal from the slave station 14 and connect the main uplink 16 and the secondary Data signals are sent to the main master station 11 and slave station 14 via the line 17, respectively. On the other hand, since the slave stations 12 1 and 12 2 remain connected to the main downlink 13, the slave stations 12 1 and 12 2 remain connected to the main downlink line 13.
The main station 11 cannot receive a paging signal from the main station 11 via the main uplink line 16 and the secondary uplink line
No data signal is sent to the slave station 14. Thereby, the main master station 11 and the slave station 14 can confirm the location of the disconnection fault by not receiving a response from the slave stations 12 1 and 12 2 . In this way, the main master station 11 stops transmitting carrier waves when it confirms the location of the fault, so the receiving circuits 25 1 and 25 2 of the slave stations 12 1 and 12 2 detect this and switch 23
1 , 23 2 , 24 1 , 24 2 and slave stations 12 1 , 1
2 2 is also switched and connected from the main downlink line 13 to the secondary downlink line 15. Therefore, when a failure occurs, after the slave station 14 confirms the location of the failure,
The slave station 14 has all the slave stations 12 1 , 12 2 ,..., 1
2 N can be called to send and receive data signals.
上述したように、本発明の集中監視制御方式に
よれば、主下り回線の回線断などの障害発生個所
を従下り回線を使用してはつきりと確認したの
ち、その従下り回線を介して従親局と複数の子局
がデータ伝送系を形成することができるので、保
存、点検が容易になり、システムの信頼性が向上
し、電力、パイプライン、水処理、交通監視など
のシステムに適用できる。
As described above, according to the centralized monitoring control method of the present invention, after clearly confirming the location of a failure such as line disconnection in the main downlink using the secondary downlink, A master station and multiple slave stations can form a data transmission system, making storage and inspection easier, improving system reliability, and making it suitable for power, pipeline, water treatment, traffic monitoring, and other systems. Applicable.
第１図は従来の２重連鎖状回線構成の集中監視
制御システムのブロツク図、第２図は本発明の一
実施例を示す要部のブロツク図、第３図は本発明
の一実施例の集中監視制御システムの動作を説明
するためのブロツク図である。
１１……主親局、１２1，１２2，…，１２N…
…子局、１３……主下り回線、１４……従親局、
１５……従下り回線、１６……主上り回線、１７
……従上り回線、２３ｉ，２４ｉ……スイツチ、
２５ｉ……受信回路。
Fig. 1 is a block diagram of a conventional centralized monitoring and control system with a double chain line configuration, Fig. 2 is a block diagram of the main part showing an embodiment of the present invention, and Fig. 3 is a block diagram of an embodiment of the present invention. FIG. 2 is a block diagram for explaining the operation of the centralized monitoring and control system. 11... Main master station, 12 1 , 12 2 ,..., 12 N ...
...Slave station, 13...Main downlink, 14...Subordinate station,
15... Secondary downlink line, 16... Main uplink line, 17
...Secondary line, 23i, 24i...switch,
25i...Reception circuit.
Claims (1)
主上り回線、従上り回線、主下り回線および従下
り回線によつて２重連鎖状回線構成にし、正常時
には前記主親局が前記主下り回線を介して前記子
局の呼出しを行い、前記主下り回線に障害が生じ
て信号のレベル低下が生じると、前記子局はこれ
を検出して前記主下り回線から前記従下り回線に
切換接続する受信回路を有しており、前記子局が
前記受信回路によつて前記主下り回線から前記従
下り回線へ切換接続すると当該子局と前記従親局
とがデータの授受を行いうる状態になり、かくし
て前記従親局が当該子局を確認したあとで、前記
主親局が複数の前記子局へデータの伝送を停止す
ることを特徴とする集中監視制御方式。1 A main master station, a slave station, and a plurality of slave stations are arranged in a double chained line configuration with a main uplink, a secondary uplink, a main downlink, and a secondary downlink, respectively, and under normal conditions, the main master station When the slave station is called via a downlink, and a failure occurs in the main downlink and the signal level drops, the slave station detects this and switches from the main downlink to the secondary downlink. a receiving circuit for connection, and when the slave station is switched from the main downlink to the secondary downlink by the receiving circuit, the slave station and the slave station can exchange data. A centralized monitoring control system characterized in that, after the slave station confirms the slave station, the main master station stops transmitting data to the plurality of slave stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9419279A JPS5619256A (en) | 1979-07-26 | 1979-07-26 | Centralized monitor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9419279A JPS5619256A (en) | 1979-07-26 | 1979-07-26 | Centralized monitor control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5619256A JPS5619256A (en) | 1981-02-23 |
| JPS6348211B2 true JPS6348211B2 (en) | 1988-09-28 |
Family
ID=14103431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9419279A Granted JPS5619256A (en) | 1979-07-26 | 1979-07-26 | Centralized monitor control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5619256A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0133679Y2 (en) * | 1985-11-21 | 1989-10-12 | ||
| EP2854416B1 (en) * | 2012-05-22 | 2019-05-08 | Mitsubishi Electric Corporation | Monitor and control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4977084A (en) * | 1972-11-30 | 1974-07-25 | ||
| JPS5484403A (en) * | 1977-12-19 | 1979-07-05 | Hitachi Ltd | Double system transmission line switching system |
-
1979
- 1979-07-26 JP JP9419279A patent/JPS5619256A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4977084A (en) * | 1972-11-30 | 1974-07-25 | ||
| JPS5484403A (en) * | 1977-12-19 | 1979-07-05 | Hitachi Ltd | Double system transmission line switching system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5619256A (en) | 1981-02-23 |
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