JPS59231953A - Loop network transmitter - Google Patents
Loop network transmitterInfo
- Publication number
- JPS59231953A JPS59231953A JP10817883A JP10817883A JPS59231953A JP S59231953 A JPS59231953 A JP S59231953A JP 10817883 A JP10817883 A JP 10817883A JP 10817883 A JP10817883 A JP 10817883A JP S59231953 A JPS59231953 A JP S59231953A
- Authority
- JP
- Japan
- Prior art keywords
- line
- transmission line
- master station
- station
- stations
- 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]
- H04L12/46—Interconnection of networks
- H04L12/4637—Interconnected ring systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はループ網を用いてデータの送受信を行なうル
ープ網伝送装置易と関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loop network transmission device for transmitting and receiving data using a loop network.
従来のこの種の装置として第１図に示すものがあった。A conventional device of this type is shown in FIG.
図番こ於て、１次伝送回線５には、１局の主親局１と複
数の親局２−１〜２−ｎとが接続され、２次伝送回線６
−１には、１局の親局２−１と複数の子局ａ−１〜３−
ｎか接続されている。In this figure, one main master station 1 and a plurality of master stations 2-1 to 2-n are connected to the primary transmission line 5, and the secondary transmission line 6
-1 includes one master station 2-1 and multiple slave stations a-1 to a-3-.
n are connected.
同様に２次伝送回線６−ｎには、１局の親局２−ｎと複
数の子局４−１〜４−ｎとが接続されている。Similarly, one master station 2-n and a plurality of slave stations 4-1 to 4-n are connected to the secondary transmission line 6-n.
次に動作について説明する。主親局１から特定の親局２
−ｉにデータを伝送する場合は、主親局１は特定の親局
２−ｉを識別する情報（これをアドレスと呼ぶ）をデー
タの先頭に付与して１次伝送回線５に出力する。送信デ
ータＴχ１は伝送回線５を１巡するので全親局２−１〜
２−ｎがこれを受信することができ、各親局２−１〜２
− ｎ ハアドレスを自局ナンバーと比較して自局宛の
データか否か判断し、自局宛データであれはその親局は
データを取込む。Next, the operation will be explained. From main master station 1 to specific master station 2
-i, the main master station 1 appends information identifying the specific master station 2-i (this is called an address) to the beginning of the data and outputs it to the primary transmission line 5. Since the transmission data Tχ1 goes around the transmission line 5 once, all master stations 2-1~
2-n can receive this, and each master station 2-1 to 2
- n The master station compares the address with its own station number to determine whether the data is addressed to its own station or not, and if the data is addressed to its own station, its master station takes in the data.
また親局２−１〜２−ｎから主親局ｌにデータＲｚｌを
送信する場合は、ポーリングと呼ぶ回線手法を取るのが
一般的である。すなわち上述の方法で主親局１は送信要
求メツセージを特定の親局２−ｉに送信する。自局宛の
送信要求メツセージを受けた親局２−ｉは、送信すべき
データＲｚｌがある場合、伝送回線５上に送信データＲ
ｘ ｌを出力する。この送信要求メツセージ（ポーリン
グと呼ぶ）の宛先を順番に変える事により、主親局１に
対する全親局２−１〜２−ｎからのデータ送信が行なえ
る。Furthermore, when transmitting data Rzl from the master stations 2-1 to 2-n to the main master station 1, a line method called polling is generally used. That is, the main base station 1 transmits the transmission request message to the specific base station 2-i using the method described above. When the master station 2-i receives the transmission request message addressed to its own station, if there is data Rzl to be transmitted, the master station 2-i transmits the transmission data Rzl on the transmission line 5.
Output x l. By sequentially changing the destination of this transmission request message (referred to as polling), data can be transmitted from all base stations 2-1 to 2-n to the main base station 1.
次に親局と子局間のデータ送受は、２次伝送回線６を使
って行ない、伝送の方法は前述した主親局１と各親局２
−１〜２−ｎとの関係と同様である。Next, data transmission and reception between the master station and the slave stations is performed using the secondary transmission line 6, and the transmission method is as described above between the main master station 1 and each master station 2.
This is the same as the relationship with -1 to 2-n.
ここで各親局２−１〜２−ｎは１次伝送回線５に接続さ
れる回線制御回路と２次伝送回線６に接続される回線制
御回路の２つの回線制御回路を持っている。そしてこの
２つの回線制御回路は親局２に内蔵されたマイクロプロ
セッサ等により制御され、必要なデータのみがマイクロ
プロセッサを介在して受渡し可能となっている。Here, each master station 2-1 to 2-n has two line control circuits, one connected to the primary transmission line 5 and the other connected to the secondary transmission line 6. These two line control circuits are controlled by a microprocessor built into the master station 2, and only necessary data can be transferred via the microprocessor.
上記の様に、１次伝送回ｔ５と２次伝送回徨６の２重ル
ープ方式を取っているのは、ループ上の１台の局に異常
が起きた場合、そのループに接続されたすべての局がダ
ウンするという欠点をカバーする為に分散処理を行なう
目的で実施されているものである。As mentioned above, the double loop method of primary transmission circuit t5 and secondary transmission circuit 6 is adopted because if an abnormality occurs in one station on the loop, all stations connected to that loop This is implemented for the purpose of performing distributed processing to compensate for the drawback that many stations go down.
従来のループ網制御装置は以上の様に構成されているの
で、親局２に障害が起きた場合、あるいは親局２の電源
が切られた場合などにおいて、２次伝送回線６に接続さ
れたすべての子局は伝送不可能となるという欠点があっ
た。Since the conventional loop network control device is configured as described above, when a failure occurs in the master station 2 or when the power of the master station 2 is turned off, the connection to the secondary transmission line 6 The disadvantage was that all slave stations were unable to transmit data.
この発明は上記のような従来の欠点を除去するためにな
されたもので、１次伝送回線と２次伝送回線の接合部に
回線切換装置および回線切換制御装置を設け、親局に障
害が起きた場合、あるいは親局の電源が切られた場合な
どに、２次伝送回線を１次伝送回線に自動的に直接接続
す−るようにすることにより、高信頼性を有するループ
網伝送装置を提供することを目的としている。This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and includes a line switching device and a line switching control device at the junction of the primary transmission line and the secondary transmission line, so that it is possible to avoid failures in the master station by providing a line switching device and a line switching control device. By automatically connecting the secondary transmission line directly to the primary transmission line when the main station is switched off or the power of the master station is turned off, a highly reliable loop network transmission system can be created. is intended to provide.
以下この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第２図において、８は１次伝送回線５と２次伝送回線６
の接合部に設けられ、各伝送回線５，６と親局２とを接
続する回線切換装置、９はこの回線切換装置８の動作を
制御する回線切換制御装置である。In Fig. 2, 8 indicates the primary transmission line 5 and the secondary transmission line 6.
A line switching device 9 is provided at the junction of the transmission lines 5, 6 and the master station 2, and a line switching control device 9 controls the operation of the line switching device 8.
第３図は回線切換装置８の一構成例を示したもので、ス
イッチにより伝送回線５，６の接続状態が切換わること
を示している。そして回線切換制御装置９は、この回線
切換装置８の各スイッチを以下の様に制御する。FIG. 3 shows an example of the configuration of the line switching device 8, and shows that the connection state of the transmission lines 5 and 6 is changed over by a switch. The line switching control device 9 controls each switch of the line switching device 8 as follows.
（１）通常は端子ａ、ｂ、ｃ、ｄ側にスイッチが倒れる
様制御する。(1) Normally, the switch is controlled so that it falls toward terminals a, b, c, and d.
（２）親局２の障害時（たとえば電源オン時９点検モー
ド時等における自己診断でエラーになった時など）、あ
るいは電源をオフにした時、端子ａ’、 ｂ’、 ｃ’
、 ｄ’側にスイッチが倒れる様制御する。(2) When the master station 2 fails (for example, when an error occurs during self-diagnosis in 9 inspection mode when the power is turned on) or when the power is turned off, terminals a', b', and c'
, Control the switch so that it falls to the d' side.
次に動作について説明する。Next, the operation will be explained.
親局２から子局３，４に対してデータＴχ２を送出する
場合も、子局３．４から親局２に対してデータにχ２を
送出する場合も、すべて親局２が主導権を持って動作す
る。従って親局２の障害時、又は親局２の電源をオフに
した場合、ループ上における親局２が存在しない事にな
り、そのループは送受信が不可能となる。この時前述し
た様に、回線切換制御装置９は上記親局２の異常を検知
し、回線切換装置８内のスイッチを端子ａ１．ｂ１．ｃ
′。Whether the master station 2 sends data Tχ2 to the slave stations 3 and 4 or the slave stations 3 and 4 send data χ2 to the master station 2, the master station 2 takes the initiative in all cases. It works. Therefore, when the base station 2 fails or when the power of the base station 2 is turned off, the base station 2 does not exist on the loop, and the loop becomes unable to perform transmission and reception. At this time, as described above, the line switching control device 9 detects an abnormality in the master station 2 and switches the switch in the line switching device 8 to terminal a1. b1. c.
'.
ｄ′側に倒す。すると、今迄１次伝送回線５と２次伝送
回線６とがそれぞれ独立して構成動作していたものが、
親局２はいずれの伝送回線５，６からも切り離され、２
次伝送回線６は１次伝送回線５の一部となり、２次伝送
回線６上の子局３，４は主親局１を自局の親局として動
作を継続し続ける。Turn it to the d' side. Then, the primary transmission line 5 and the secondary transmission line 6, which had been configured and operated independently until now, will now become
The master station 2 is disconnected from both transmission lines 5 and 6, and
The next transmission line 6 becomes part of the primary transmission line 5, and the slave stations 3 and 4 on the secondary transmission line 6 continue to operate with the main master station 1 as their own master station.
ここで、もちろん主親局１はあらがじめ子局３゜４のす
べてに対するアドレスの送出を行うと共に、子局３，４
すべてに対するデータのバッファを持って右り、また子
局３．４の自局ナンバーは余子局間番゛こ於て重複しな
い様に設定されている。Here, of course, the main master station 1 first sends addresses to all of the slave stations 3 and 4, and
There is a data buffer for all the slave stations, and the own station numbers of slave stations 3 and 4 are set so as not to overlap among the remaining slave stations.
以上の様に、この発明によれば、１次伝送回線と２次伝
送回線との接合部に回線切換装置および回線切換制御装
置を設け、親局に障害が起きた場合、あるいは親局の電
源が切れた場合などに、２次伝送回線を１次伝送回線に
自動的に直接接続する様にしたので、それ迄２次回線−
上で動作していた子局が１次回線上の子局として動作を
継続することとなり、高い信頼度と安定性を持つループ
網が得られる効果がある。As described above, according to the present invention, a line switching device and a line switching control device are provided at the joint between the primary transmission line and the secondary transmission line, and when a failure occurs in the master station or the power supply of the master station When the secondary transmission line is disconnected, the secondary transmission line is automatically connected directly to the primary transmission line.
The slave station that was operating on the primary line continues to operate as a slave station on the primary line, which has the effect of providing a loop network with high reliability and stability.
第１図は従来のループ網伝送装置の構成図、第２図はこ
の発明の一実施例によるループ網伝送装置の構成図、第
３図は該装置の回線切換装置の一構成例を示す図である
。
（１）・・・主親局、（２−１）〜（２−ｎ）・・・親
局、（３−１）〜（３−ｎ）、 （４７１）〜（４−ｆ
ｌ）・・・子局、（５）・・・１次伝送回線、（６−１
）〜（６−ｎ）・・・２次伝送回線、（８−１）〜（８
−ｎ）・・・回線切換装置、（９−１）〜（９−１１）
・・・回線切換制御装置。
なお図中同一符号は同一、又は相当部分を示す。
代理人 大岩増雄
特開昭５９−２３１９５３ （３）
第１図
第２図
■
第３図FIG. 1 is a configuration diagram of a conventional loop network transmission device, FIG. 2 is a configuration diagram of a loop network transmission device according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of the configuration of a line switching device of the device. It is. (1) Main master station, (2-1) to (2-n) Master station, (3-1) to (3-n), (471) to (4-f
l)...Slave station, (5)...Primary transmission line, (6-1
) to (6-n)...secondary transmission line, (8-1) to (8
-n)...Line switching device, (9-1) to (9-11)
...Line switching control device. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa JP-A-59-231953 (3) Figure 1 Figure 2■ Figure 3
Claims (1)
る１次伝送回線と、上記複数の親局のそれぞれとこのそ
れぞれの親局に対して複数局設けられた子局とをループ
状に接続する２次伝送回線とを有し、各局間でデータ伝
送を行なうループ網伝送装置において、上記１次伝送回
線と複数の２次伝送回線のそれぞれとの接合部に設けら
れ上記１次伝送回線と２次伝送回線とを上記親局を介し
て接続するかあるいは直接接続するかを切換える回線切
換装置と、上記親局に異常が起きた時該親局を上記１次
、２次伝送回線から切離して該画伝送回線が直接接続さ
れるよう上記回線切換装置を制御する回線切換制御装置
とを備えたことを特徴と−するループ網伝送装置。(1) A primary transmission line that connects one main master station and a plurality of master stations in a loop, and a plurality of slave stations provided for each of the plurality of master stations and each of the master stations. In a loop network transmission device that has a secondary transmission line that connects the above in a loop and performs data transmission between each station, the above-mentioned a line switching device for switching whether the primary transmission line and the secondary transmission line are connected via the master station or directly; A loop network transmission device comprising: a line switching control device for controlling the line switching device so that the image transmission line is directly connected to the next transmission line by being disconnected from the next transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10817883A JPS59231953A (en) | 1983-06-14 | 1983-06-14 | Loop network transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10817883A JPS59231953A (en) | 1983-06-14 | 1983-06-14 | Loop network transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59231953A true JPS59231953A (en) | 1984-12-26 |
Family
ID=14477966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10817883A Pending JPS59231953A (en) | 1983-06-14 | 1983-06-14 | Loop network transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59231953A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62219826A (en) * | 1986-03-20 | 1987-09-28 | Mitsubishi Electric Corp | Gateway of load control system |
| EP0242764A2 (en) * | 1986-04-14 | 1987-10-28 | Geräte- und Regler-Werk Leipzig GmbH | Method and arrangement for the decentralized transfer of the master function in multicomputer systems with a looped transmission channel |
| JPS6354040A (en) * | 1986-08-25 | 1988-03-08 | Hitachi Ltd | Ring constituting system for line concentrator |
| FR2660781A1 (en) * | 1990-04-10 | 1991-10-11 | Alcatel Business Systems | Home automation installation |
-
1983
- 1983-06-14 JP JP10817883A patent/JPS59231953A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62219826A (en) * | 1986-03-20 | 1987-09-28 | Mitsubishi Electric Corp | Gateway of load control system |
| EP0242764A2 (en) * | 1986-04-14 | 1987-10-28 | Geräte- und Regler-Werk Leipzig GmbH | Method and arrangement for the decentralized transfer of the master function in multicomputer systems with a looped transmission channel |
| JPS6354040A (en) * | 1986-08-25 | 1988-03-08 | Hitachi Ltd | Ring constituting system for line concentrator |
| FR2660781A1 (en) * | 1990-04-10 | 1991-10-11 | Alcatel Business Systems | Home automation installation |
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