JPH0716199B2 - Multipoint monitoring system - Google Patents
Multipoint monitoring systemInfo
- Publication number
- JPH0716199B2 JPH0716199B2 JP1339365A JP33936589A JPH0716199B2 JP H0716199 B2 JPH0716199 B2 JP H0716199B2 JP 1339365 A JP1339365 A JP 1339365A JP 33936589 A JP33936589 A JP 33936589A JP H0716199 B2 JPH0716199 B2 JP H0716199B2
- Authority
- JP
- Japan
- Prior art keywords
- slave station
- queue
- slave
- station
- normal
- 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 - Fee Related
Links
Landscapes
- Small-Scale Networks (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はデータの流れを１箇所の親局（制御局）で集
中的にコントロールするマルチポイント監視システムに
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a multipoint monitoring system in which a single master station (control station) centrally controls a data flow.
〔従来の技術〕 第３図は例えば「マイコンインターフェイス技報、テキ
スト〔１〕〜〔５〕」P.13（トリケップス社、昭和58年
４月27日出版）に示された従来のポーリングセレクショ
ン方式（送信勧誘受信要求方式）によるマルチポイント
監視システムを示す説明図であり、図において、１は特
定のステーション（制御局）としての親局、２〜５は子
局で伝送路６を経てマルチポイント形態に前記子局２〜
５に接続され、通信を行う。親局１は子局２〜５に対応
した子局テーブル９を待ち行列10の中に格納して管理
し、順次、子局テーブル９を取出しては送受信手段８に
取込み、該当子局アドレスを付加した送信勧誘であるポ
ーリングフレーム７を伝送路６に送信する。子局２〜５
は自局アドレスの送信勧誘に従い、応答フレームを親局
１に返送する。[Prior Art] FIG. 3 is a conventional polling selection system shown in, for example, "Microcomputer Interface Technical Report, Text [1] to [5]" P.13 (Trikeps Co., Ltd., published April 27, 1983). It is an explanatory view showing a multipoint monitoring system by the (solicited reception request system). In the figure, 1 is a master station as a specific station (control station), 2-5 are slave stations, and multipoint via a transmission line 6. 2 to the form
5 is connected to communicate. The master station 1 stores the slave station table 9 corresponding to the slave stations 2 to 5 in the queue 10 for management, sequentially fetches the slave station table 9 and fetches it into the transmission / reception means 8, and outputs the corresponding slave station address. The polling frame 7, which is the added invitation, is transmitted to the transmission line 6. Child stations 2-5
Responds to the solicitation of its own address, and returns a response frame to the master station 1.
次に動作について説明する。まず、親局１は、待ち行列
10より子局テーブル９を順次取出し、送受信手段８に移
送する。送受信手段８は子局テーブル９の子局アドレス
に従い送信勧誘のポーリングフレーム７を伝送路６に送
信する。伝送路６にはマルチポイント形態に子局２〜５
が接続されているため、該ポーリングフレーム７は全子
局に傍受されるが、ポーリングフレーム７は子局アドレ
スが一致する子局のみに取込まれ、該当子局のみが子局
情報を付加した応答フレームを、伝送路６を介して親局
１に返送する。親局１の送受信手段８は、前記動作を通
して該当子局からの応答フレームを受信すると子局テー
ブル９の子局情報を更新して、待ち行列10に格納する。
親局１は、待ち行列10を順次、更新していく処理を行う
ことで、子局２〜５の子局情報を順次収集する。Next, the operation will be described. First, the master station 1 has a queue
The slave station table 9 is sequentially taken out from 10 and transferred to the transmitting / receiving means 8. The transmitting / receiving means 8 transmits the polling frame 7 of the invitation to the transmission line 6 according to the slave station address in the slave station table 9. In the transmission line 6, slave stations 2 to 5 are provided in a multipoint form.
, The polling frame 7 is intercepted by all the slave stations, but the polling frame 7 is taken in only by the slave stations having the matching slave station address, and only the relevant slave station adds the slave station information. The response frame is returned to the master station 1 via the transmission path 6. When the transmitting / receiving means 8 of the master station 1 receives the response frame from the corresponding slave station through the above operation, it updates the slave station information in the slave station table 9 and stores it in the queue 10.
The master station 1 sequentially collects the slave station information of the slave stations 2 to 5 by sequentially updating the queue 10.
従来のマルチポイント監視システムは以上のように構成
されているので、複数の子局のうち応答フレームを親局
に返信しない障害子局が発生しても、待ち行列から除外
されることがないため、毎回ポーリング途中で障害子局
にて、タイムアウトが発生し、親局のポーリング周期が
大きくなり、正常子局の情報更新が遅れるなどの課題が
あった。Since the conventional multipoint monitoring system is configured as above, even if a faulty slave station that does not return a response frame to the master station among multiple slave stations occurs, it is not excluded from the queue. However, there was a problem that a time-out occurred in the faulty slave station during each polling, the polling cycle of the master station increased, and the information update of the normal slave station was delayed.
この発明は上記のような課題を解消するためになされた
もので、障害子局が発生した時、または該障害子局が復
旧した場合にも正常子局の情報更新が遅れることがない
マルチポイント監視システムを得ることを目的とする。The present invention has been made to solve the above problems, and multipoint that does not delay the information update of normal slave stations when a faulty slave station occurs or when the faulty slave station is restored. The purpose is to obtain a surveillance system.
この発明に係るマルチポイント監視システムは、親局内
に正常子局待ち行列と障害子局待ち行列とを設け、正常
子局待ち行列内の子局テーブルに対応した子局のうち所
定数の子局に対してポーリングを行うと、障害子局待ち
行列内の子局テーブルに対応した子局に対してポーリン
グを行い、子局が正常または規定回以下の連続無応答で
あれば正常子局待ち行列に、その子局に対応した子局テ
ーブルを編入し、また子局が規定回を越えて連続して無
応答の場合には障害子局待ち行列にその子局に対応した
子局テーブルを編入する管理手段を設けたものである。The multipoint monitoring system according to the present invention provides a normal slave station queue and a faulty slave station queue in the master station, and for a predetermined number of slave stations among the slave stations corresponding to the slave station table in the normal slave station queue. Polling the slave station corresponding to the slave station table in the failed slave station queue, and if the slave station is normal or if there is no response of less than the specified number of times, it will be in the normal slave station queue. A management means is incorporated into the slave station table corresponding to the slave station, and when the slave station has not responded continuously over the specified number of times, the slave station table corresponding to the slave station is incorporated into the faulty slave station queue. It is provided.
この発明における親局は、正常子局待ち行列と障害子局
待ち行列の２つの待ち行列とを有し、親局からのポーリ
ングに対し子局が連続して無応答となった場合には障害
子局待ち行列に編入する。又、正常子局待ち行列を所定
局分処理する毎に、前記障害子局待ち行列を一局分処理
し、応答があった場合、正常子局待ち行列へその子局の
子局テーブルを編入するようにしたことにより効率の良
い子局情報の収集を行う。The master station according to the present invention has two queues, a normal slave station queue and a faulty slave station queue. If the slave station becomes unresponsive to polling from the master station, a failure occurs. Transfer to the slave station queue. Also, every time the normal slave station queue is processed for a predetermined number of stations, the failed slave station queue is processed for one station, and if there is a response, the slave station table of that slave station is added to the normal slave station queue. By doing so, efficient collection of child station information is performed.
以下、この発明の一実施例を図について説明する。図
中、第３図と同一の部分は同一の符号をもって図示した
第１図において、９は子局テーブル、11は正常子局待ち
行列、12は障害子局待ち行列で、親局１は子局２〜５に
対応した前記子局テーブル９を前記それぞれの待ち行列
の中に収納して管理する管理手段13を有する。また、管
理手段13は、条件に応じて子局テーブル９を取出し、送
受信手段８に転送し、該当子局アドレスを付加した送信
勧誘であるポーリングフレーム７を伝送路６に送信させ
る。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as in FIG. 3 are shown with the same reference numerals. In FIG. 1, 9 is a slave station table, 11 is a normal slave station queue, 12 is a failed slave station queue, and master station 1 is a slave station. It has a management means 13 for storing and managing the slave station tables 9 corresponding to the stations 2 to 5 in the respective queues. Further, the management means 13 retrieves the slave station table 9 according to the conditions, transfers it to the transmission / reception means 8, and causes the transmission frame 6 to transmit the polling frame 7 which is the invitation to send with the relevant slave station address added.
次に動作について説明する。まず親局１は最初、子局２
〜５の全ての子局テーブル９を正常子局待ち行列11に格
納しておく。子局テーブル９には、例えば子局アドレス
無応答回数、子局情報等が含まれている（ステップST
1）。親局１の管理手段13は、正常子局待ち行列11のｎ
回のポーリングにつき、障害子局待ち行列12の子局テー
ブル９を１回の割合で取出し送受信手段８に送出する
（ステップST2）。送受信手段８は子局テーブル９をも
とに該当子局アドレスを付加した送信勧誘であるポーリ
ングフレーム７を伝送路６に送信する（ステップST
3）。ここで、該当子局から正常応答があった場合に
は、管理手段13は、子局テーブル９の無応答回数を零に
戻し、子局情報を更新して子局テーブル９を正常子局待
ち行列11に編入する（ステップST4）。また、該当子局
が無応答で、かつ、子局テーブル９の無応答回数がｍ回
であった場合には、子局テーブル９を障害子局待ち行列
12に編入する（ステップST5）。該当子局が無応答で、
かつ、子局テーブル９の無応答回数がｍ回未満の場合に
は無応答回数に１を加算し、正常子局待ち行列11に編入
する（ステップST6）。なお、無応答の判定は、ポーリ
ングフレーム７を送信後、一定時間以内に子局から応答
フレームを受信しないことで判断する。Next, the operation will be described. First of all, the master station 1 is the slave station 2
All slave station tables 9 to 5 are stored in the normal slave station queue 11. The slave station table 9 includes, for example, the slave station address no response count, slave station information, etc. (step ST
1). The management means 13 of the master station 1 uses n in the normal slave station queue 11.
For each polling, the slave station table 9 of the failed slave station queue 12 is taken out once and sent to the transmitting / receiving means 8 (step ST2). The transmitting / receiving means 8 transmits to the transmission path 6 a polling frame 7 which is a solicitation for invitation based on the slave station table 9 and to which the relevant slave station address is added (step ST
3). Here, when there is a normal response from the corresponding slave station, the management means 13 returns the number of non-responses in the slave station table 9 to zero, updates the slave station information, and waits for the slave station table 9 to wait for a normal slave station. Transfer to queue 11 (step ST4). If the corresponding slave station has no response and the number of non-responses in the slave station table 9 is m, the slave station table 9 is set to the failed slave station queue.
Transfer to 12 (step ST5). The corresponding slave station is not responding,
When the number of non-responses in the slave station table 9 is less than m, 1 is added to the number of non-responses and the normal slave station queue 11 is transferred (step ST6). Note that the non-response is determined by not receiving the response frame from the slave station within a fixed time after transmitting the polling frame 7.
また、上記実施例では、待ち行列を正常子局待ち行列と
障害子局待ち行列の２つ設けた例について説明したが目
的に応じて、複数の段階にわけて設けてもよい。Further, in the above embodiment, an example in which two queues are provided, that is, the normal slave station queue and the faulty slave station queue have been described, but the queues may be provided in a plurality of stages depending on the purpose.
また、編入の条件や、夫々の回数m,nの値は目的に応じ
て設定値を変更するようにしてもよく、上記実施例と同
様の効果を奏する。Further, the setting condition may be changed according to the purpose, and the values of the numbers of times m and n may be changed, and the same effect as the above-described embodiment is obtained.
〔発明の効果〕 以上のように、この発明によれば親局内に正常子局待ち
行列と障害子局待ち行列とを設け、親局からのポーリン
グに対し子局が連続して無応答となった場合には、障害
子局待ち行列にその子局の子局テーブルを編入し、又、
正常子局待ち行列内の子局テーブルに対応した子局をｎ
局ポーリングする毎に前記障害子局待ち行列の子局テー
ブルに対応した子局を１局ポーリングし、応答があった
場合には正常子局待ち行列へその子局の子局テーブルを
編入するようにしたので、障害子局のポーリング頻度が
下って効率のよい子局情報収集が行える効果がある。さ
らに、子局テーブルが正常子局待ち行列と障害子局待ち
行列とに分けてキューイングされているので、管理手段
は、ｎ回毎に１回、機械的に障害子局待ち行列子局テー
ブルを取り出すだけ、障害子局への周期的な問い合わせ
を発生することができる。As described above, according to the present invention, the normal slave station queue and the faulty slave station queue are provided in the master station, and the slave station continuously becomes unresponsive to polling from the master station. In case of failure, transfer the child station table of the child station to the failed child station queue,
Normal slave station n corresponding slave stations in the slave station table
Every time polling is performed, one slave station corresponding to the slave station table of the faulty slave station queue is polled, and when there is a response, the slave station table of the slave station is transferred to the normal slave station queue. Therefore, there is an effect that the polling frequency of the failed slave station is reduced and the slave station information can be collected efficiently. Further, since the slave station table is divided into a normal slave station queue and a failed slave station queue for queuing, the management means mechanically executes the failure slave station queue slave station table once every n times. It is possible to generate a periodic inquiry to the faulty slave station only by taking out.
第１図はこの発明の一実施例によるマルチポイント監視
システムを示す説明図、第２図は第１図の動作を説明す
るためのフローチャート、第３図は従来のマルチポイン
ト監視システムの説明図である。 図において、１は親局、２〜５は子局、７はポーリング
フレーム、８は送受信手段、９は子局テーブル、11は正
常子局待ち行列、12は障害子局待ち行列、13は管理手段
である。 なお、図中、同一符号は、同一又は相当部分を示す。FIG. 1 is an explanatory diagram showing a multipoint monitoring system according to an embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation of FIG. 1, and FIG. 3 is an explanatory diagram of a conventional multipoint monitoring system. is there. In the figure, 1 is a master station, 2 to 5 are slave stations, 7 is a polling frame, 8 is a transmitting / receiving means, 9 is a slave station table, 11 is a normal slave station queue, 12 is a failed slave station queue, and 13 is management. It is a means. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
て用意されている子局テーブル内の子局アドレスに従っ
て各子局を順次ポーリングし子局情報を収集する送受信
手段を有する親局とを備えたマルチポイント監視システ
ムにおいて、前記親局は、無応答回数が所定回数以下で
ある各子局に対応した各子局テーブルを格納する正常子
局待ち行列と、無応答回数が所定回数を越えている各子
局に対応した各子局テーブルを格納する障害子局待ち行
列と、前記正常子局待ち行列内の先頭の子局テーブルを
取り出してその子局テーブルを前記送受信手段に供給す
る操作を規定回行う毎に前記障害子局待ち行列内の先頭
の子局テーブルを取り出してその子局テーブルを前記送
受信手段に供給する操作を行うとともに、ポーリング先
の子局の応答を検出するとその子局に対応する子局テー
ブルの無応答回数を零にして前記正常子局待ち行列の最
後尾に設定し、ポーリング先の子局の無応答を検出する
とその子局に対応する子局テーブルの無応答回数を検査
し、無応答回数が所定回数に達している場合にはその子
局テーブルを前記障害子局待ち行列の最後尾に設定し、
無応答回数が所定回数未満である場合にはその回数を１
増やして前記正常子局待ち行列の最後尾に設定する管理
手段とを備えたことを特徴とするマルチポイント監視シ
ステム。1. A plurality of slave stations and transmission / reception means for sequentially polling each slave station according to a slave station address in a slave station table prepared for each slave station and collecting slave station information. In a multipoint monitoring system including a master station, the master station has a normal slave station queue storing a slave station table corresponding to each slave station whose number of non-responses is a predetermined number or less, and the number of non-responses. A faulty slave station queue that stores slave station tables corresponding to slave stations that have exceeded a predetermined number of times, and the first slave station table in the normal slave station queue are taken out and the slave station table is sent to the transmitting / receiving means. Each time the supply operation is performed a prescribed number of times, the head slave station table in the faulty slave station queue is taken out and the slave station table is supplied to the transmission / reception means, and the response of the slave station at the polling destination is detected. Then, the number of non-responses of the slave station table corresponding to the slave station is set to zero and set to the end of the normal slave station queue, and when no response of the polling destination slave station is detected, the slave station table of the slave station corresponding to the slave station is detected. The number of non-responses is checked, and when the number of non-responses reaches a predetermined number, the slave station table is set at the end of the faulty slave station queue,
If the number of non-response is less than the predetermined number, set the number to 1
A multipoint monitoring system comprising: a management unit for increasing the number and setting it at the end of the normal slave station queue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1339365A JPH0716199B2 (en) | 1989-12-27 | 1989-12-27 | Multipoint monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1339365A JPH0716199B2 (en) | 1989-12-27 | 1989-12-27 | Multipoint monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03198549A JPH03198549A (en) | 1991-08-29 |
| JPH0716199B2 true JPH0716199B2 (en) | 1995-02-22 |
Family
ID=18326779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1339365A Expired - Fee Related JPH0716199B2 (en) | 1989-12-27 | 1989-12-27 | Multipoint monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716199B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU668444B2 (en) * | 1993-01-21 | 1996-05-02 | Nec Corporation | Polling type data collection system |
| JP2680989B2 (en) * | 1994-04-13 | 1997-11-19 | 日本電気通信システム株式会社 | Polling schedule method |
| JP3452414B2 (en) * | 1995-02-08 | 2003-09-29 | 富士通株式会社 | Remote monitoring control method and system |
| JP5705149B2 (en) * | 2012-02-07 | 2015-04-22 | 三菱電機株式会社 | Communication evaluation system |
| CN112799124B (en) * | 2020-12-30 | 2024-05-17 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Data transmission method and device for distributed seismic exploration acquisition system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133740A (en) * | 1981-02-12 | 1982-08-18 | Mitsubishi Electric Corp | Control method for transmission system |
| JPS57141158A (en) * | 1981-02-26 | 1982-09-01 | Fujitsu Ltd | Communication control system |
| JPS5945742A (en) * | 1982-09-08 | 1984-03-14 | Omron Tateisi Electronics Co | Polling transmission system |
| JPS6159941A (en) * | 1984-08-30 | 1986-03-27 | Fujitsu Ltd | Terminal control system of multi-drop connection |
| JP2529995B2 (en) * | 1988-04-05 | 1996-09-04 | 富士通株式会社 | Failure handling method for multi-drop line |
-
1989
- 1989-12-27 JP JP1339365A patent/JPH0716199B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03198549A (en) | 1991-08-29 |
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