JPS59223040A - Double system controlling system of intelligent terminal in loop transmitting system - Google Patents

Double system controlling system of intelligent terminal in loop transmitting system

Info

Publication number
JPS59223040A
JPS59223040A JP58095824A JP9582483A JPS59223040A JP S59223040 A JPS59223040 A JP S59223040A JP 58095824 A JP58095824 A JP 58095824A JP 9582483 A JP9582483 A JP 9582483A JP S59223040 A JPS59223040 A JP S59223040A
Authority
JP
Japan
Prior art keywords
data
terminal
double
loop transmission
lcp
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
JP58095824A
Other languages
Japanese (ja)
Other versions
JPH0220189B2 (en
Inventor
Hiroshi Matsumaru
松丸　宏
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 Ltd
Original Assignee
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 Ltd filed Critical Hitachi Ltd
Priority to JP58095824A priority Critical patent/JPS59223040A/en
Publication of JPS59223040A publication Critical patent/JPS59223040A/en
Publication of JPH0220189B2 publication Critical patent/JPH0220189B2/ja
Granted legal-status Critical Current

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]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Abstract

PURPOSE:To improve reliability at a low cost by executing a conversion to a double system in an intelligent terminal under a capacity level of a microcumputer. CONSTITUTION:A terminal C being a double system is provided with transmission control devices (NCP) 3c, 3d, 4c and 4d of two systems, and information processing devices (LCP) 7, 8, the NCPs 3d, 4d and the LCP7 constitute a system I , the NCPs 3c, 4c and the LCP8 constitute a system II, and usually the system I and the system II are operated as a main system and a sub-system, respectively. The system II continues an operation of a sub-system as it is while an interval of a data received successively is within a period t1, and continues to monitor the data, but after the previous data is received, the next data is not received even after a prescribed period t1 elapses, and when a prescribed period t2 which is longer than the prescribed period t1 elapses, the LCP8 looks upon as some abnormality is generated in the LCP operated as the main system until that time, executes a switch-processing to the sub-system from the main system, and at the time point when this prescribed period t2 elapses, the operation is shifted to a data transmitting operation for which the LCP8 is the main system, and a control operation as the terminal C converted to a double system is executed.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、ループ伝送システムにおける二重化された端
末での制御方式に係り、特に二重系インテリジェント端
末における相互監視データの伝送〔発明の背景〕 データ伝送システムの信頼性の向上は、常に新たな命題
である。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a control method at a duplex terminal in a loop transmission system, and particularly relates to a control system for mutual monitoring data in a duplex intelligent terminal [Background of the Invention] Data Improving the reliability of transmission systems is always a new proposition.

ところで、これの対応策として慣用されている技法の一
つにシステムの二重系化がある。By the way, one of the commonly used techniques to deal with this problem is to create dual systems.

しかして、従来のデータ伝送システムにおける二重系化
は、主として中央集中形のシステムにおいで、その中央
制御部を構成するコンピュータシステムなどに用いられ
ていた。However, duplex systems in conventional data transmission systems have been mainly used in centralized systems, such as computer systems constituting the central control section thereof.

ととろが、このような中央集中形のシステムにおける二
重系化においては、コンピュータのハードウェア、ソフ
トウェア両面における二重系制御のための特別な道具立
てが必要になる。即ち、ハードウェア面では、両方の系
のメモリに自白にアクセス可能な装置としたり、両方の
系に共用可能なメモリなどが必要になり、他方、ソフト
ウェア面では、系の切換時におけるデータの連続性を保
郁ための様々なプログラムが必要になる。However, in order to create a dual system in such a centralized system, special tools for controlling the dual system in both computer hardware and software are required. In other words, on the hardware side, a device that can freely access the memory of both systems or a memory that can be shared by both systems is required.On the other hand, on the software side, it is necessary to have a device that can freely access the memory of both systems, and on the other hand, on the software side, it is necessary to have a device that can freely access the memory of both systems. Various programs are needed to preserve sexuality.

従って、このような中央集中形のシステムの二他方、近
年にいたり、このようなデータ伝送システムは、従来の
中央集中形から分散形へと移行し、機能の集中化に伴な
う信頼性低下の虞れはなくなってきた。Therefore, in recent years, such data transmission systems have shifted from the conventional centralized system to the decentralized system, and reliability has decreased due to the centralization of functions. The fear of this has disappeared.

そして、このような分散形のシステムではループ伝送に
よるネットワークが主流を占め、この面でも信頼性の向
上は著ｌ一層が、他面、分散形システムでは、端末のイ
ンテリジェント化が必須であり、このため、端末にはマ
イクロコンピュータが多数用いられるようになり、この
部分での信頼性向上が新たな命題となる。In such distributed systems, networks based on loop transmission are the mainstream, and in this respect, the reliability is significantly improved.On the other hand, in distributed systems, it is essential that the terminals become intelligent, and this Therefore, many microcomputers are now being used in terminals, and improving reliability in this area has become a new challenge.

そこで、このようなシステムにおいては、端末における
マイクロコンピュータレベルでの二重系化が信頼性向上
の面から必要になる。Therefore, in such a system, duplex system at the microcomputer level at the terminal is required to improve reliability.

しかしながら、マイクロコンピュータのハード面、ソフ
ト面での能力を考慮すれば、従来の集中形のシステムに
おけるコンピュータレベルでの二重系化を実現すること
は極めて困難であり、これを専用のハードウェアなどの
サポートにより実現させたのではコストアップとなって
実用的ではなくなってしまうという問題点がある。However, considering the hardware and software capabilities of microcomputers, it is extremely difficult to realize redundancy at the computer level in conventional centralized systems. The problem is that if this was achieved with the support of

〔発明の目的〕[Purpose of the invention]

本発明の目的は、上記しブこ従来システムにおける問題
点に鑑み、マイクロコンピュータの能力レベルのもとで
のインテリジェント端末における二重系化を可能にし、
コストアップをほとんど伴わずに信頼性の向上が得られ
るようにしたループ伝送システムにおけるインテリジェ
ント端末の二重系制御方式を提供するにある。In view of the above-mentioned problems in the conventional system, an object of the present invention is to enable dual systemization in an intelligent terminal at the capability level of a microcomputer,
An object of the present invention is to provide a dual-system control method for intelligent terminals in a loop transmission system, which improves reliability with almost no increase in cost.

〔発明の概要〕[Summary of the invention]

この目的を達成するため、本発明は、端末内における二
重系機能のための相互監視データを、ループ伝送路を介
して端末相互間で伝送すべき本来のデータと一緒に、同
じ態様で伝送するようにした点′ｆｒＯ徴とする。To achieve this objective, the present invention transmits mutual monitoring data for dual-system functions within a terminal in the same manner together with the original data to be transmitted between terminals via a loop transmission path. Let the point 'frO be the characteristic.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明によるループ伝送システムにおけるインテ
リジェント端末の二重系制御方式の実施例を図面によっ
て説明する。Hereinafter, embodiments of a dual system control method for intelligent terminals in a loop transmission system according to the present invention will be described with reference to the drawings.

第１図は二重ループ伝送系によって具体化した本発明の
一実施例で、図において、１は右回りのデータ伝送方向
をもつループ伝送路、２は左回シのデータ伝送方向をも
つループ伝送路、３ａないし３ｅと４ａないし４ｅは伝
送制御装置（以下、ＮＣＰという、々お、これはＮｅｔ
ｗｏｒｋ　ＣｏｎｔｒｏｌＰｒｏｃｅｓｓｏｒの略）、
５ないし９は各端末人ないしＤのそれぞれにおけるマイ
クロコンピュータによる情報処理装置（以下、ＬＣＰと
いう、なお、これはＬｏｃａｌ　Ｃｏｎｔｒｏｌ　Ｐｒ
ｏｃｅｓｓｏｒの略）である。FIG. 1 shows an embodiment of the present invention embodied by a double loop transmission system. In the figure, 1 is a loop transmission path with a clockwise data transmission direction, and 2 is a loop with a counterclockwise data transmission direction. The transmission lines 3a to 3e and 4a to 4e are transmission control devices (hereinafter referred to as NCP).
work ControlProcessor),
5 to 9 are microcomputer-based information processing devices (hereinafter referred to as LCPs) in each terminal person to D.
(abbreviation for ocessor).

ループ伝送路１，２は二重ループ伝送系を構成し、通常
はループ伝送路１による右回り径路によるデータ伝送が
行なわれているが、このループ伝送路１に断線などによ
る故障が生じたときには左回りの伝送路２によるデータ
伝送に切換えられ、システムダウンとなる虞れはない。Loop transmission lines 1 and 2 constitute a double loop transmission system, and data is normally transmitted through a clockwise route using loop transmission line 1. However, if a failure occurs in loop transmission line 1 due to a disconnection, etc. Data transmission is switched to counterclockwise transmission path 2, and there is no risk of system failure.

また、このときＮＣＰ３ａ〜３ｅと４ａ〜４ｅのそれぞ
れの間が結合されているため、迂回ルートによる伝送も
可能で高い信頼性が得られる。Furthermore, since the NCPs 3a to 3e and 4a to 4e are coupled at this time, transmission via a detour route is also possible and high reliability can be obtained.

ＮＣＰ３ａ〜、４ａ〜はＬＣＰ５〜９と共にそｆｚＰｆ
ｒのｓ＊Ａ、Ｄを構成し、これらの端末Ａ〜Ｄのうち端
末Ｃが二重系となっている。NCP3a~, 4a~ together with LCP5~9 fzPf
s*A and D of r are configured, and among these terminals A to D, terminal C is a dual system.

次に、この実施例の動作を第２図によって説明する。Next, the operation of this embodiment will be explained with reference to FIG.

二重系となっている端末Ｃにおいては、２系統のＮ　Ｃ
Ｐ　３　ｃ　＋　３　ｄ　ｒ　４　ｃ　＋　４　ｄとＬ
ＣＰ７，８を備え、ＮＣＰ３ｄ、４ｄとＬＣＰ７がＩ系
、ＮＣＰ３ｃ、４ｃとＬＣＰ８が■系を構成し、通常は
ｌ系を主系、■系を従系として動作する。At terminal C, which has a dual system, two systems of NC
P 3 c + 3 d r 4 c + 4 d and L
The system is equipped with CPs 7 and 8, with NCPs 3d and 4d and LCP7 forming the I system, and NCPs 3c and 4c and LCP8 forming the ■system.Normally, the I system operates as the main system and the ■system as the slave system.

そこで、通常はＬＣＰ７がＮＣＰ　３　ｄを介してルー
プ伝送路１に結合し、他の端末Ａ％Ｂ％Ｄとの間でのデ
ータ伝送を行ない、ＬＣＰ７から送信されたデータ■は
、とのとき主系伝送路として働いているループ伝送路１
を介して伝送され、必要な端末Ａ、Ｂ、Ｄの込ずれかに
おいて受信され、ループ伝送路１を１巡したあとＮＣＰ
３ｄに戻ったときに消去される。Therefore, normally LCP7 connects to loop transmission line 1 via NCP 3d and performs data transmission with other terminals A%B%D, and the data ■ sent from LCP7 is as follows. Loop transmission line 1 working as the main transmission line
is transmitted via the NCP, is received at any of the necessary terminals A, B, and D, and after going around the loop transmission path 1 is transmitted to the NCP.
It will be deleted when you return to 3d.

こうして各端末Ａ−Ｄ、相互間でのデータ伝送が周知の
如く遂行され、このとき、ループ伝送路１゜２とＮＣＰ
３ａ　〜３ｅ及びＮＣＰ４ａ　〜４ｅからなる二重ルー
プ伝送系による高い信頼性が得られる。In this way, data transmission between the terminals A to D is carried out as is well known, and at this time, the loop transmission line 1.2 and the NCP
High reliability can be obtained by the double loop transmission system consisting of NCPs 3a to 3e and NCPs 4a to 4e.

一方、との間、ＬＣＰ７から送信されたデータ■はルー
プ伝送路１からＮＣＰ３ｃを介して従系となっている■
系のＬＣＰ８にも受信されるようになっている。On the other hand, data ■ sent from LCP 7 is sent from loop transmission line 1 to slave system ■ via NCP 3c between
It is also received by LCP8 of the system.

そして、ＬＣＰ８は、このＬＣＰ７から送信されたデー
タ■を受信することによりＬＣＰ７の動作状態を監視し
、Ｌ　ＣＰ　７−１ｔｉ正常な動作を行なっているか否
かを判断するようになっている。The LCP 8 monitors the operating state of the LCP 7 by receiving the data (1) transmitted from the LCP 7, and determines whether or not the LCP 7-1ti is operating normally.

そこで、いま、二重系化されている端末Ｃの主系を構成
するＬ　ＣＰ　７は、他の端末Ａ、Ｂ％Ｄに対して送信
すべきデータが全く現われていない期間があっても、所
定の期間ｔ１ごとに必ず何らかのデータの送信を行なう
ようにプログラムしておく。Therefore, L CP 7, which constitutes the main system of terminal C, which is currently configured as a dual system, even if there is a period in which no data to be transmitted to other terminals A and B%D appears. It is programmed to always transmit some data every predetermined period t1.

つまり、このＬＣＰ７は、この端末Ｃから他の端末Ａ、
Ｂ、Ｄに伝送すべきデータが所定期間ｔ１以内に連続し
て発生している間は、それらのデータを次々と送信する
が、他の端末Ａ％Ｂ％Ｄに送信すべきデータが所定期間
ｔ１以上現われなかったときには、端末Ａ、Ｂ１Ｄを対
象としたデータとは別に、これらの端末Ａ％Ｂ、Ｄにお
いては特に意味のない監視用のデータを送信し、とにか
＜ＬＣＰ７からなる主系が正誉である限りは、所定の期
間ｔ１以内ごとに必ず何らかのデータがＬＣＰ７から送
信されるようにしておくのである。このときに補充され
る監視用のデータは、他の端末Ａ、Ｂ。In other words, this LCP7 connects from this terminal C to another terminal A,
While the data to be transmitted to terminals B and D occur continuously within the predetermined period t1, those data are transmitted one after another, but the data to be transmitted to other terminals A%B%D is generated within the predetermined period t1. If it does not appear for t1 or more, in addition to the data targeted at terminals A and B1D, these terminals A%B and D transmit monitoring data that has no particular meaning, and somehow the main data consisting of <LCP7 is transmitted. As long as the system is honorable, some data is always sent from the LCP 7 within a predetermined period t1. The monitoring data supplemented at this time is for the other terminals A and B.

Ｄにとって必要とするデータではなく、単に従系となっ
て動作しているＬＣＰ　８が受信したとき、主系として
動作して論るＬＣＰ７が正常に動作していることが確認
できるものであればよいから、との限りにおいて任意の
信号形式のものでよい。It is not data that is needed by D, but simply data that can be confirmed by LCP 8, which is operating as a slave system, to be operating normally when it is received by LCP 8, which is operating as a master system. Any signal format may be used as long as it is acceptable.

一方、このとき従系として動作しているＬＣＰ８は、ル
ープ伝送路１又は２からＮＣＰ　３　ｃ又は４ｃを介し
て受信されるデータを監視し、自らが所属する端末Ｃを
発信アドレスとするデータが順次現われるごとに、１つ
前に受信したデータからの期間が所定の期間−に襖して
いるか否かを調べる。そして、順次受信されたデータの
間隔が期間ｔ１以内である間はそのまま従系としての動
作を継続し、上記したデータの監視を続けるが、一つ前
のデータを受信したあと、所定の期間１．が過ぎても次
のデータが受信されず、やガで所定の期間ｔ１より長い
所定の期間ちが経過すると、ＬＣＰ８はそれまで主系と
して動作していたＬＣＰ７に何らかの異常が発生したも
のとみなし、主系から従系への切換処理を行ない、この
所定の期間−が経過した時点でＬＣＰＢｋ主系とするデ
ータ伝送動作に移行し、二重系化された端末Ｃとしての
制御動作を行なう。On the other hand, the LCP 8 operating as a slave system at this time monitors the data received from the loop transmission path 1 or 2 via the NCP 3c or 4c, and detects data whose originating address is the terminal C to which it belongs. Each time the data appears sequentially, it is checked whether the period from the previous data received falls within a predetermined period. As long as the interval between sequentially received data is within the period t1, it continues to operate as a slave system and continues to monitor the data described above. ．． If the next data is not received even after , and a predetermined period longer than the predetermined period t1 elapses, LCP8 assumes that some abnormality has occurred in LCP7, which was operating as the main system until then. , performs a switching process from the main system to the slave system, and when this predetermined period has elapsed, shifts to data transmission operation as the LCPBk main system, and performs control operations as a dual system terminal C.

そこで、この切換動作をタイムチャートで示すと第３図
のようになる。Therefore, this switching operation is shown in a time chart as shown in FIG. 3.

なお、以上の説明は、ループ伝送路１を介した場合のも
のであるが、ループ伝送路２に切換った場合にも全く同
様であるのはいうまでもない。The above explanation is for the case where the loop transmission line 1 is used, but it goes without saying that the same applies when switching to the loop transmission line 2.

従って、この実施例によれば、二重系制御に必要な監視
用データの伝送が、他の端末との間での本来のデータ伝
送と全く同様にループ伝送路を介して行なわれるため、
監視データ伝送のための専用のハードウェアを全く要せ
ず、−万、そのため、に付加すべき処理も極く簡単なも
ので済み、マイクロコンピュータの能力で充分に可能な
範囲に保つことができる。Therefore, according to this embodiment, the monitoring data necessary for dual system control is transmitted via the loop transmission line in exactly the same way as the original data transmission with other terminals.
There is no need for any dedicated hardware for monitoring data transmission; therefore, the additional processing required is extremely simple, and can be kept within the range that is fully possible with the capabilities of a microcomputer. .

なお、以上の実施例では、各端末Ａ％Ｂ％Ｄに対して二
重系端末Ｃから送信すべき本来のデータも二重系制御の
だめの監視用データとして利用しておシ、この結果、監
視用データの送出頻度が少くなり、その分マイクロコン
ピュータの負荷も」少〈て済むが、監視用データと本来
のデータとを全く独立にし、所定の期間ζごとに必ず監
視用のデータを送信するように構成してもよい。In addition, in the above embodiment, the original data to be sent from the duplex system terminal C to each terminal A%B%D is also used as monitoring data for duplex system control, and as a result, The frequency of sending monitoring data will be reduced, and the load on the microcomputer will be reduced accordingly, but it is possible to make the monitoring data and the original data completely independent, and always send the monitoring data every predetermined period ζ. It may be configured to do so.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば、端末の二重系制
御のだめの監視信号の伝送が本来のデータ伝送と同じ処
理で可能なため、従来システムにおける問題点が解決で
き、ループ伝送システムにおけるインテリジェント端末
の二重系化をローコストで行なうことができ１．高す信
頼性を有するデータ伝送システムを容易に提供すること
ができる。As explained above, according to the present invention, it is possible to transmit the monitoring signal for dual system control of the terminal using the same process as the original data transmission, so the problems in the conventional system can be solved, and the problems in the loop transmission system can be solved. A dual system of intelligent terminals can be achieved at low cost.1. A highly reliable data transmission system can be easily provided.

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

第１回は本発明によるインテリジェント端末の二重系制
御方式の一実施例を示す概略構成図、第２図はそのデー
タ伝送動作の説明図、第３図は同じく動作説明用のタイ
ムチャートである。 １．２・・・・・・ループ伝送路、３ａ〜３ｅ、４ａ〜
４ｅ・・・・・・伝送制御装置（ＮＣＰ）、５〜９・・
・・・・情報処理装置（ＬＣＰ）。 第１図 Δ 第２図　　　　第３図 、７１ −２＝The first part is a schematic configuration diagram showing an embodiment of the dual system control method for an intelligent terminal according to the present invention, FIG. 2 is an explanatory diagram of its data transmission operation, and FIG. 3 is a time chart for explaining the operation. . 1.2...Loop transmission line, 3a to 3e, 4a to
4e...Transmission control device (NCP), 5-9...
... Information processing device (LCP). Figure 1 Δ Figure 2 Figure 3, 71 -2=

Claims (1)

【特許請求の範囲】 １、二重系インテリジェント端末を含むループ伝送シス
テムにおいて、二重系インテリジェント端末内の複数の
端末処理手段相互相での監視用データの伝送を、ループ
伝送路を介して行なうように構成したことを特徴とする
ループ伝送システムにおけるインテリジェント端末の二
重系制御方式。 ２、特許請求の範囲第１項において、上記ループ伝送路
が二重ループ伝送路で構成されていることを特徴とする
ループ伝送システムにおけるインテリジェント端末の二
重系制御方式。[Claims] 1. In a loop transmission system including dual intelligent terminals, data for monitoring is transmitted between a plurality of terminal processing means in the dual intelligent terminals via a loop transmission path. A dual system control method for intelligent terminals in a loop transmission system characterized by the following configuration. 2. A dual-system control method for an intelligent terminal in a loop transmission system according to claim 1, wherein the loop transmission line is a double loop transmission line.
JP58095824A 1983-06-01 1983-06-01 Double system controlling system of intelligent terminal in loop transmitting system Granted JPS59223040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58095824A JPS59223040A (en) 1983-06-01 1983-06-01 Double system controlling system of intelligent terminal in loop transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58095824A JPS59223040A (en) 1983-06-01 1983-06-01 Double system controlling system of intelligent terminal in loop transmitting system

Publications (2)

Publication Number Publication Date
JPS59223040A true JPS59223040A (en) 1984-12-14
JPH0220189B2 JPH0220189B2 (en) 1990-05-08

Family

ID=14148152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58095824A Granted JPS59223040A (en) 1983-06-01 1983-06-01 Double system controlling system of intelligent terminal in loop transmitting system

Country Status (1)

Country Link
JP (1) JPS59223040A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5257744A (en) * 1975-11-07 1977-05-12 Hitachi Ltd Station control unit of data freeway
JPS54133859A (en) * 1978-04-08 1979-10-17 Toshiba Corp Backing-up method of electronic computer system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5257744A (en) * 1975-11-07 1977-05-12 Hitachi Ltd Station control unit of data freeway
JPS54133859A (en) * 1978-04-08 1979-10-17 Toshiba Corp Backing-up method of electronic computer system

Also Published As

Publication number Publication date
JPH0220189B2 (en) 1990-05-08

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