JPS60194851A - Communication supervisory recording system - Google Patents

Communication supervisory recording system

Info

Publication number
JPS60194851A
JPS60194851A JP59050485A JP5048584A JPS60194851A JP S60194851 A JPS60194851 A JP S60194851A JP 59050485 A JP59050485 A JP 59050485A JP 5048584 A JP5048584 A JP 5048584A JP S60194851 A JPS60194851 A JP S60194851A
Authority
JP
Japan
Prior art keywords
communication
station
master station
slave station
storage
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
Application number
JP59050485A
Other languages
Japanese (ja)
Inventor
Yasuro Saito
斎藤　康郎
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP59050485A priority Critical patent/JPS60194851A/en
Publication of JPS60194851A publication Critical patent/JPS60194851A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To analyze easily a cause to a fault by discriminating it as the fault if a non-communication time continues for a prescribed time or over between a master station and plural slave stations so as to stop the recording of content of communication. CONSTITUTION:The content 8 of communication between the master station and plural slave stations 51-5N is stored in a storage device 4, old data are erased by the first-in first-out system so as to prevent the storage device 4 from being overflowed. The non-communication detecting means 2 detects the presence of a request of communication from the master station to each slave station and when no communication exists, a state signal 6 is transmitted so as to count up a counter of a storage operation stop means 3, and when a communication exists, the counter is restored to zero by a counter reset signal 9. When the number stored in the counter reaches a prescribed value, the storage of communication with the slave station is stopped so as to hold the recording so far. Thus, no communication, that is, the cause to a fault is analyzed easily.

Description

【発明の詳細な説明】 （発明の技術分野） 本発明は、複数の従局が通信回線によシ接続されたデー
タ処理装置における、障害原因究明を目的とした通信監
視記録方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a communication monitoring and recording method for the purpose of investigating the cause of a failure in a data processing device in which a plurality of slave stations are connected via a communication line.

（従来技術と問題点） 従来、通信回線上の障害原因究明を目的としたこの種の
方式では過去に行なわれた総ての従局の通信の履歴を連
続的に常時、記録していく技術は存在したが、履歴が記
録される記録手段は一定の記憶容量の記憶装置で、記憶
容量を越える情報が入力された場合には自動的に最も古
い記憶から順次消去しながら新たな情報を記憶するとい
う記憶動作（いわゆる巡回バッファ）となっているため
、障害発生直後に人為的に前記記憶動作を停止させない
限シ、障害原因究明の手掛シとなる障害が発生した従局
との過去の通信の内容が失われてしまうという欠点があ
った。(Prior art and problems) Conventionally, in this type of method aimed at investigating the cause of failures on communication lines, there is no technology that continuously records the history of all slave station communications that have occurred in the past. However, the recording means that records the history is a storage device with a certain storage capacity, and if information exceeding the storage capacity is input, it automatically erases the oldest memory and stores new information. Since this is a memory operation (so-called circular buffer), unless the memory operation is artificially stopped immediately after a failure occurs, past communications with the slave station where the failure occurred can be used as a clue to investigating the cause of the failure. The drawback was that the content was lost.

（発明の目的） 本発明の目的は、主局と各従局との間で、ある一定時間
内には少なくとも必ず１回は行なわれるべき通信が全く
行なわれなくなった状態を検出し、その時点まで自動的
かつ連続的に行なわれていた通信内容の記録動作を自動
的に停止す心ことによシ上記欠点を解決し障害発生時点
までに記憶手段に記録された主局と従局との間で行なわ
れていたすべての通信内容をそのままの状態で保持する
ことによシ、障害解析作業の効率を高めることを可能に
しようとするものである。(Objective of the Invention) The object of the present invention is to detect a state in which communication that should be carried out at least once within a certain period of time is not carried out at all between a master station and each slave station, and to By automatically stopping the recording operation of the communication contents that had been carried out automatically and continuously, the above-mentioned drawbacks can be solved and the communication contents between the master station and the slave station recorded in the storage means up to the time of failure can be automatically stopped. By retaining all communication contents as they are, it is possible to improve the efficiency of failure analysis work.

（発明の構成） 本発明は、上記目的を達成するために次のような構成を
有する。即ち、 主局と複数の従局を有するデータ通信システムにおいて
、主局と各従局との通信内容を記憶し該通信内容の情報
量が記゛憶容量を越えた場合には最も古い記憶から順次
消去しながら新しい通信内容を記憶する記憶手段と、主
局と各従局間の無通信（無応答ともいう）状態を各従局
毎に検出する無通信（無応答）検出手段と、各従局毎の
無通信（無応答）状態検出回数が予め設定された回数に
達した時に記憶動作停止信号を発生する記憶動作停止手
段とを設け、主局といずれかの従局との間の無通信（無
応答）状態が前記予め設定された回数に達した時に、前
記記憶手段の新たな記憶動作を停止させる通信監視記録
方式である。(Structure of the Invention) The present invention has the following structure in order to achieve the above object. In other words, in a data communication system that has a master station and multiple slave stations, the content of communication between the master station and each slave station is stored, and if the amount of information in the communication content exceeds the storage capacity, it is erased sequentially starting from the oldest memory. a storage means for storing new communication contents, a no-communication (no-response) detection means for detecting a no-communication (also called no-response) state between the master station and each slave station for each slave station, and a no-communication (no-response) detection means for each slave station. A memory operation stop means is provided which generates a memory operation stop signal when the number of communication (non-response) state detections reaches a preset number of times. This communication monitoring and recording method stops new storage operations in the storage means when the state reaches the preset number of times.

第１図は本発明を適用したシステみの構成を示すブロッ
ク図である。図中、１は主局データ従局、６は無通信（
無応答）信号、７は記憶動作停止信号、８は主局と従局
間の通信内容、９はカウンターリセット信号である。記
憶手段４は主局と各従局間の通信内容を時間の流れに従
って記憶していく。FIG. 1 is a block diagram showing the configuration of a system to which the present invention is applied. In the figure, 1 is the master station data slave station, 6 is no communication (
7 is a storage operation stop signal, 8 is the communication content between the master station and the slave station, and 9 is a counter reset signal. The storage means 4 stores the contents of communication between the master station and each slave station in accordance with the flow of time.

記憶容量を越えて通信内容が入力されてきた場合には通
常は時間的に古い記憶内容から順次消去して新しい通信
内容を記憶する。即ち、記憶手段４の記憶内容は時間の
経過と共に順次入れ替わる巡回型の内容となっている。When communication content is input in excess of the storage capacity, normally the oldest memory content is sequentially erased and new communication content is stored. That is, the stored contents of the storage means 4 are cyclic contents that are sequentially replaced over time.

無通信（無応答）検出手段２は、各従局如対する主局か
らのポーリング（通信の要求があるか否かの問いかけ）
に対して応答が有ったか否かを各従局側に検出する。応
答が無かった場合には無通信（無応答）状態信号を、ま
た応答があった場合にはカウンターリセット信号９を記
録動作停止手段３へ送出する。記録動作停止手段３では
、各従局側に無通信（無応答）状態信号６が送られて来
た回数をカウンターでカウントする。しかし、カウント
数が予め設定された値（例えばＮ）に達する前にカウン
ターリセット信号９が送られて来た場合には当該従局の
無通信（無応答）状態カウント数は零にリセットされる
。そしてリセットされることなく、換言すれば、無通信
（無応答）状態信号６が連続して送られて来てその回数
が前記予め設定された値Ｎに達した時に記憶動作停止信
号７を記憶手段４へ送出し、記憶手段４の記憶動作を停
止せしめる。その結果、記憶手段４には停止する特進に
入力された通信内容がそのまま保持される。The no-communication (no-response) detection means 2 includes polling from the master station to each slave station (inquiry as to whether there is a request for communication).
Detects whether there is a response to each slave station. If there is no response, a no-communication (no response) status signal is sent to the recording operation stop means 3, and if there is a response, a counter reset signal 9 is sent to the recording operation stop means 3. The recording operation stop means 3 uses a counter to count the number of times a no-communication (no-response) state signal 6 has been sent to each slave station. However, if the counter reset signal 9 is sent before the count reaches a preset value (for example, N), the no-communication (no-response) state count of the slave station is reset to zero. Then, without being reset, in other words, when the no-communication (no-response) status signal 6 is sent continuously and the number of times reaches the preset value N, the storage operation stop signal 7 is stored. The data is sent to the storage means 4, and the storage operation of the storage means 4 is stopped. As a result, the communication contents input to the stopped express train are retained in the storage means 4 as they are.

以上の動作を要約すれば、主局といずれかの従局との間
の通信がＮ回連続して無通信（無応答）状態となった時
にはこれを障害発生と見て、記憶手段の巡回記憶動作を
自動的に停止させて障害原因究明の手掛シとなる過去の
通信内容の記録を保存させる通信監視記録方式である。To summarize the above operation, when the communication between the master station and any slave station is in a state of no communication (no response) N times in a row, this is regarded as a failure, and the cyclic memory of the storage means is stored. This is a communication monitoring and recording method that automatically stops operations and saves a record of past communications that can be used as a starting point for investigating the cause of a failure.

（発明の実施例） 第２図は、本発明方法の実施例のプログラムによる制御
のうち第ｎ番目の従局５ｎの制御に着目して記述した流
れ図である。(Embodiment of the Invention) FIG. 2 is a flowchart that focuses on the control of the n-th slave station 5n among the control by the program of the embodiment of the method of the present invention.

ステップ３１では主局データ処理装置の初期化処理とし
て、障害発生状態か否かを示すフラグＦのリセットが行
われ、ステップ３２では主局のポーリング（ステップ３
３）に対して第ｎ番目の従局５ｒＬが連続して何回無応
答状態であったかを示すカウンタＣｎのクリアが行なわ
れる。In step 31, as initialization processing of the main station data processing device, a flag F indicating whether a failure has occurred is reset, and in step 32, polling of the main station (step 3) is performed.
3), a counter Cn indicating how many times the n-th slave station 5rL has been in a non-responsive state is cleared.

なお、カウンタは従局の数だけ存在するものとする。It is assumed that there are as many counters as there are slave stations.

ステップ３８〜４１は、主局のポーリング（ステップ３
３）に対して従局が応答してきた場合に　主局が受信し
た応匁の種類（ステップ３４３５．３６．３７に示され
る応答ａ、ｂ、ｌ！。Steps 38 to 41 are polling of the main station (step 3).
3) When the slave station responds, the type of response received by the master station (responses a, b, l! shown in steps 3435.36.37).

ｄ）に対応した通信処理を行なうことを示している。ス
テップ３４〜３７は無応答状態を検出する過程を示して
いる。This indicates that communication processing corresponding to d) is to be performed. Steps 34 to 37 show the process of detecting a non-response state.

ステップ４３は無応答カウンタＯｎのカウント値が設定
値Ｎを越えたか否かを判断するステップであシ、越えて
いない場合にはステップ４４で無応答カウンタＣｎをカ
ウントアツプし、越えた場合にはステップ４５で障害発
生状態フラグＦがセットされる。Step 43 is a step of determining whether or not the count value of the no-response counter On has exceeded the set value N. If the count value has not exceeded the set value N, the no-response counter Cn is counted up in step 44; At step 45, a failure occurrence state flag F is set.

なお、各従局の正常状態では、該設定値Ｎの示す回数の
ポーリングに対して、少なくとも一回は何らかの応答が
返されるものとする。It is assumed that in a normal state of each slave station, some kind of response is returned at least once in response to the number of pollings indicated by the set value N.

一方描該従局５ｎに応答がちシステップ３８〜４１によ
って通信が行われた場合には、ステップ４６で他の従局
によって障害発生状態フラグＦがセットされているか否
かを点検する。そして障害発生状態フラグＦがセットさ
れていない場合にはステップ４７で通信内容を記憶手段
４（通信履歴記録バッファ）に順次記録し、ステップ４
８で尚該従局５ｎの無応答カウンタＣｎをクリアする。On the other hand, if the slave station 5n responds and communication is performed in steps 38 to 41, it is checked in step 46 whether or not the failure occurrence state flag F is set by another slave station. If the failure occurrence state flag F is not set, the communication contents are sequentially recorded in the storage means 4 (communication history recording buffer) in step 47, and step 4
8, the no-response counter Cn of the slave station 5n is cleared.

障害発生状態７２グＦがセットされている場合にはステ
ップ４７．４８は実行されない。Steps 47 and 48 are not executed if the failure condition 72gF is set.

すなわち、障害発生状態フジグＦがセットされた場合に
は、該７２グＦをセットする原因となった従局について
のステップ４７．４８を禁止するだけでなく本データ処
理装置に接続されるすべての従局に対応するステップ４
７．４８の実行を禁止する。In other words, when the failure status F is set, steps 47 and 48 are not only prohibited for the slave station that caused the failure status F to be set, but also all slave stations connected to this data processing device are prohibited. Step 4 corresponding to
7.48 is prohibited.

すなわち、無通信状態が検出された状態では、該通信履
歴記録バッファへの新たな書き込みも該無応答カウンタ
Ｃｎのクリアも全従局にわたって、−切行なわれないた
め、該通信履歴記録バッファに既に書き込まれている通
信履歴はそのままの状態で保存されることになる。That is, in a state where a no-communication state is detected, neither new writing to the communication history recording buffer nor clearing of the no-response counter Cn is performed across all slave stations. The communication history will be saved as is.

従って、何らかの原因によシ第ｎ番目の従局からの無応
答回数が設定値Ｎになると、該通信履歴記録バッファへ
の書き込みが禁止されるので、障害解析時に該バッファ
を読み出すことによシ、その時点までに行なわれた通信
の内容を知ることができ、障害解析のための有効な情報
となシ得る。Therefore, if the number of non-responses from the n-th slave station reaches the set value N for some reason, writing to the communication history record buffer is prohibited, so reading the buffer during failure analysis will prevent It is possible to know the contents of the communications that have taken place up to that point, which can serve as useful information for fault analysis.

（発明の効果） 以上説明したように本発明方法を適用したデータ通信シ
ステムにおいては、主局と従局との間で無通信状態が続
き障害発生と判断された場合には、通信内容を記録する
記憶手段の巡回記憶動作が停止し、障害発生特進の一定
量の通信内容の記録が保持されるので、この記録を障害
原因究明の有力な手掛シとして用いることができるとい
う利点がある。(Effects of the Invention) As explained above, in the data communication system to which the method of the present invention is applied, if a state of no communication continues between the master station and the slave station and it is determined that a failure has occurred, the content of communication is recorded. Since the cyclic storage operation of the storage means is stopped and a record of a certain amount of communication contents of the failure occurrence special is retained, this record has the advantage that it can be used as a powerful clue in investigating the cause of the failure.

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

第１図は本発明を適用したシステムの構成を示すブロッ
ク図、第２図は本発明方法の実施例１・・・主局データ
処理装置、２・・・無通信（無応答）検出手段、３・・
・記録動作停止手段、４・・・記憶手段、５１〜５Ｎ・
・・従局、６・・・無通信（無応答）信号、７・・・記
憶動作停止信号、８・・・主局と従局間の通信内容、９
・・・カウンターリセット信号、３１〜４１．４３〜４
８・・・流れ図のステップ代理人　弁理士　八　幡　義
　博FIG. 1 is a block diagram showing the configuration of a system to which the present invention is applied, and FIG. 2 is an embodiment of the method of the present invention. 1...Main station data processing device, 2...No communication (no response) detection means, 3...
・Recording operation stop means, 4...Storage means, 51 to 5N・
...Slave station, 6...No communication (no response) signal, 7...Storage operation stop signal, 8...Communication content between master station and slave station, 9
...Counter reset signal, 31~41.43~4
8...Steps in the flowchart Agent Yoshihiro Yahata, patent attorney

Claims (1)

【特許請求の範囲】[Claims] 主局と複数の従局を有するデータ通信システムにおいて
、主局と各従局との通信内容を記憶し該通信内容の情報
量が記憶容量を越えた場合には最も古い記憶から順次消
去しながら新しい通信内容を記憶する記憶手段と、主局
と各従局間の無通信状態を各従局毎に検出する無通信検
出手段と、各従局毎の無通信状態検出回数が予め設定さ
れた回数に達した時に記憶動作停止信号を発生する記憶
動作停止手段とを設け、主局といずれかの従局との間の
無通信状態が前記予め設定された回数に達した時に、前
記記憶手段の新たな記憶動作を停止させることを特徴と
する通信監視記録方式。In a data communication system that has a master station and multiple slave stations, the contents of communication between the master station and each slave station are stored, and when the amount of information of the communication contents exceeds the storage capacity, the oldest memory is deleted sequentially and new information is transmitted. a storage means for storing contents; a no-communication detecting means for detecting a no-communication state between the master station and each slave station for each slave station; storage operation stop means for generating a storage operation stop signal, and when the non-communication state between the master station and any of the slave stations reaches the preset number of times, the storage means starts a new storage operation. A communication monitoring and recording method characterized by stopping the communication.
JP59050485A 1984-03-16 1984-03-16 Communication supervisory recording system Pending JPS60194851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59050485A JPS60194851A (en) 1984-03-16 1984-03-16 Communication supervisory recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59050485A JPS60194851A (en) 1984-03-16 1984-03-16 Communication supervisory recording system

Publications (1)

Publication Number Publication Date
JPS60194851A true JPS60194851A (en) 1985-10-03

Family

ID=12860214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59050485A Pending JPS60194851A (en) 1984-03-16 1984-03-16 Communication supervisory recording system

Country Status (1)

Country Link
JP (1) JPS60194851A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62143537A (en) * 1985-12-18 1987-06-26 Nec Corp Communication network administration system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62143537A (en) * 1985-12-18 1987-06-26 Nec Corp Communication network administration system
JPH0520015B2 (en) * 1985-12-18 1993-03-18 Nippon Electric Co

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