JPH06102927A - Diagnostic system for sequence control circuit - Google Patents

Diagnostic system for sequence control circuit

Info

Publication number
JPH06102927A
JPH06102927A JP4294707A JP29470792A JPH06102927A JP H06102927 A JPH06102927 A JP H06102927A JP 4294707 A JP4294707 A JP 4294707A JP 29470792 A JP29470792 A JP 29470792A JP H06102927 A JPH06102927 A JP H06102927A
Authority
JP
Japan
Prior art keywords
status
pattern
time
duration
signal
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
JP4294707A
Other languages
Japanese (ja)
Inventor
Akitaka Sugimasa
暎貴 杉政
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.)
SEREAN GIKEN KK
Original Assignee
SEREAN GIKEN KK
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 SEREAN GIKEN KK filed Critical SEREAN GIKEN KK
Priority to JP4294707A priority Critical patent/JPH06102927A/en
Publication of JPH06102927A publication Critical patent/JPH06102927A/en
Pending legal-status Critical Current

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  • Testing And Monitoring For Control Systems (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To indicate a unit to be inspected by calculating the maximum value and the minimum value of time data of respective statuses on a pattern, generating allowable continuation time arranged in the same order as the statuses, setting it to be a diagnosis reference and executing diagnosis by the comparison of the pattern and the comparison of status continuation time. CONSTITUTION:Data of plural cycles are divided into the patterns for respective cycles and continuation time, and the patterns for the respective cycles are compared with the pattern of the diagnosis reference. The continuation time of the respective steps is compared with the allowable continuation time of the judgement reference as to the cycle when the patterns coincide, and the alarm of timing abnormality is given as to a signal becoming a cause generating the status of the step as to the step which is not settled within allowable continuation time. On the other hand, the status of the initial step which does not coincide is compared with that of the corresponding step of the diagnosis reference as to the cycle when the patterns do not coincide, and the alarm of operation order abnormality is given to a signal where a difference can be recognized.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はシーケンス制御回路の診
断方式に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic method for a sequence control circuit.

【0002】[0002]

【従来の技術】個別計測データは、長時間の経過をコン
パクトに保存できる長所を有する一方、任意の時点の状
況を知るためには長時間の経過を辿らなければならない
短所を有するため、該データを診断に利用することは困
難だった。また、複数信号を同時に記録する方法は、記
録時間に比例して記録量が増大するため、長時間の経過
を記録するには、大容量の記憶装置を要する欠点を有し
ていた。従って、従来のシーケンス制御回路診断方式
は、短時間の経過記録で可能な故障停止後に故障箇所に
係わる異常信号を摘出する方式が主流であった。
2. Description of the Related Art Individual measurement data has the advantage of being able to save a long time in a compact manner, but has the disadvantage of having to follow a long time in order to know the situation at an arbitrary point in time. Was difficult to use for diagnosis. Further, the method of simultaneously recording a plurality of signals has a drawback that a large-capacity storage device is required to record a long time since the recording amount increases in proportion to the recording time. Therefore, the conventional sequence control circuit diagnosis method is mainly a method of extracting an abnormal signal related to a failure location after a failure stoppage that can be performed by recording progress for a short time.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、従来の
シーケンス制御回路診断方式では、故障停止の前兆現象
である不安定な信号を検出できないという不具合があっ
た。
However, the conventional sequence control circuit diagnosing method has a problem in that an unstable signal, which is a symptom of failure stoppage, cannot be detected.

【0004】そこで、本発明は、個別計測データから不
安定な信号を検出し、要点検機器を指摘することの可能
なシーケンス制御回路診断方式を提供することを目的と
する。
Therefore, it is an object of the present invention to provide a sequence control circuit diagnostic system capable of detecting an unstable signal from individual measurement data and pointing out a device requiring inspection.

【0005】[0005]

【課題を解決するための手段】このような目的を達成す
るために、本発明は、正常時の個別計測データより、同
一時点の前記信号のオン/オフ状態を予め定められた信
号の順番に配置したステータスを編集し、同一内容のス
テータスを連続配置することなく内容の異なるステータ
スを予め定められた順序で配置したパターンと、
In order to achieve such an object, the present invention uses the individual measurement data at the normal time to determine the on / off state of the signal at the same time point in a predetermined signal order. A pattern in which the statuses that have been arranged are edited and statuses with different contents are arranged in a predetermined order without continuously arranging the statuses with the same contents,

【0006】パターン上の各ステータスの時間データの
最大値と最小値を算出し、ステータスと同じ順序で配置
した許容継続時間と、
A maximum value and a minimum value of time data of each status on the pattern are calculated, and an allowable continuation time is arranged in the same order as the status,

【0007】を作成して診断基準とし、同一形式の測定
データと、パターンの比較、および、各ステータス継続
時間の大小比較によって診断を行うことを特徴とする。
Is prepared and used as a diagnostic reference, and the diagnosis is performed by comparing the measurement data of the same format with the pattern and comparing the size of each status continuation time.

【0008】[0008]

【作用】本発明は、シーケンス制御される機器が故障の
発生によって停止する以前に、故障機器に係わる制御信
号の作動タイミングが大きく変動したり、作動順序がチ
ャタリング等のノイズで乱れたりする点に着目し、個別
計測データをこれらの不安定信号を容易に検出できるパ
ターンと許容継続時間へ変換する。
According to the present invention, before the sequence-controlled device is stopped due to the occurrence of a failure, the operation timing of the control signal relating to the failed device is greatly changed, or the operation sequence is disturbed by noise such as chattering. Focusing attention, the individual measurement data is converted into a pattern and an allowable duration that can easily detect these unstable signals.

【0009】パターンはステータスの変化をコンパクト
に表示し、同一作動順序のシーケンスでは同一パターン
となる。従って、正常な状態で同一シーケンスを繰り返
した場合、シーケンス一巡(以下、サイクルと称する)
毎のパターンは、多くの場合、同一となる。希に複数の
パターンとなる設備もあるが種類は多くないので、これ
らのパターンと異なるパターンを検出した時は正常状態
から逸脱したと判断できる。
The pattern compactly displays the change in status, and becomes the same pattern in the sequence of the same operation sequence. Therefore, when the same sequence is repeated in a normal state, one cycle of the sequence (hereinafter referred to as cycle)
The patterns for each are often the same. There are rare cases where there are multiple patterns of equipment, but there are not many types. Therefore, when a pattern different from these patterns is detected, it can be determined that the normal state has been deviated.

【0010】さらに、チャタリング等の短時間のノイズ
が発生した場合にはパターンは大きく乱れるので、潜在
的な短時間の異常も見落とすことなく検出できる。
Further, when noise such as chattering for a short time occurs, the pattern is greatly disturbed, so that a potential short-time abnormality can be detected without being overlooked.

【0011】許容継続時間は対応するステータスの継続
時間の許容幅を最大値と最小値で表示する。各ステータ
スの継続時間の変動は、機器の劣化とともに大きくなる
傾向があるので、予め定めた許容幅を越えた信号の係わ
る機器は劣化が進んだと判断できる。
As the allowable duration, the allowable width of the duration of the corresponding status is displayed with the maximum value and the minimum value. Since the fluctuation of the duration of each status tends to increase with the deterioration of the device, it can be determined that the deterioration of the device involved with the signal exceeding the predetermined allowable width.

【0012】さらに、継続時間がゼロに近づく場合は作
動順序に変化が起こる前兆であり、誤動作故障の発生を
予告していると判断できる。
Further, when the duration time approaches zero, it is a sign that a change in the operating sequence will occur, and it can be determined that the occurrence of a malfunction malfunction has been foretold.

【0013】[0013]

【実施例】以下、図面を参照して本発明実施例を詳細に
説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0014】図1は、個別計測データを示す。オン/オ
フ状態欄は、オン状態を1で、オフ状態を0で示してい
る。時刻t0より記録を開始し、時刻t1に信号1がオ
フからオンへ変化したことを記録している。続いて、時
刻t2から時刻t4において、信号2から信号4が順次
オフからオンへ変化したことを記録している。同様に、
時刻t5から時刻t8において信号4から信号1が順次
オンからオフへ変化したことを記録し、時刻t9にて記
録を停止したことを記録している。本図を1サイクルの
記録とする。
FIG. 1 shows individual measurement data. In the on / off state column, the on state is 1 and the off state is 0. Recording is started from time t0, and it is recorded that the signal 1 changes from off to on at time t1. Subsequently, from time t2 to time t4, it is recorded that the signals 2 to 4 sequentially change from off to on. Similarly,
At time t5 to time t8, it is recorded that the signal 4 to the signal 1 sequentially changes from on to off, and at time t9, the recording is stopped. This figure is a record of one cycle.

【0015】図2は、図1の時刻t9におけるステータ
ス、即ち、最終オン/オフ状態を示す。図1の時刻t5
から時刻t8のオン/オフ状態欄より、信号1から信号
4の最終オン/オフ状態は本図のとおり編集される。
FIG. 2 shows the status at time t9 in FIG. 1, that is, the final on / off state. Time t5 in FIG.
From the on / off state column from time t8 to t8, the final on / off states of the signals 1 to 4 are edited as shown in the figure.

【0016】図3は、図1の内容をステータスと継続時
間に編集し、時系列に配置した結果を示す。ステップ番
号は説明のため仮に付した番号である。ステップ9のス
テータスは、図2の内容と同一で各信号の最終オン/オ
フ状態を、継続時間は記録停止時までの継続時間を示し
ている。ステップ8のステータスは、信号1が図1の時
刻t8においてオフ状態になる前の状態はオン状態であ
り、信号2から信号4は引き続きオフ状態であることか
ら求められる。同様に、時刻t7よりt0へ遡ることに
よりステップ7からステップ1を編集する。
FIG. 3 shows the result of editing the contents of FIG. 1 into a status and a duration and arranging them in time series. The step number is a temporary number for the purpose of explanation. The status in step 9 is the same as that shown in FIG. 2 and indicates the final ON / OFF state of each signal, and the duration indicates the duration until the recording is stopped. The status of step 8 is obtained from the fact that the signal 1 is in the on state before being turned off at the time t8 in FIG. 1 and the signals 2 to 4 are still in the off state. Similarly, step 7 to step 1 are edited by going back from time t7 to t0.

【0017】図4は、シーケンス制御回路の診断基準と
なるパターンと許容継続時間に編集した結果を示す。本
診断基準は、図3の継続時間に技術的な検討を加えて許
容継続時間を定めて作成する場合と、複数回の個別計測
データから得られる複数の図3形式データよりステップ
毎に継続時間の最小値と最大値を求めて作成する場合が
ある。
FIG. 4 shows a pattern as a diagnostic reference of the sequence control circuit and the result of editing the allowable duration. This diagnostic criterion is based on the case where the allowable duration is determined by adding technical consideration to the duration shown in Fig. 3 and the duration of each step based on multiple Fig. 3 format data obtained from multiple individual measurement data. It may be created by finding the minimum and maximum values of.

【0018】図4の診断基準を編集した後の診断は、次
の通り実行する。最初に、個別計測データを図3の形式
へ編集する。次に、複数サイクルのデータを、サイクル
毎のパターンと継続時間に分割して、サイクル毎にパタ
ーンを診断基準のパターンと比較する。
The diagnosis after editing the diagnostic criteria of FIG. 4 is executed as follows. First, the individual measurement data is edited into the format shown in FIG. Next, the data of a plurality of cycles is divided into a pattern and a duration of each cycle, and the pattern is compared with the diagnostic reference pattern for each cycle.

【0019】パターンが一致したサイクルについては、
各ステップの継続時間を判断基準の許容継続時間と比較
し、許容継続時間に収まらぬステップについて、前ステ
ップと異なる状態を示す信号、即ち、そのステップのス
テータスを作る原因となった信号についてタイミング異
常の警報を発する。また、複数サイクルのデータから継
続時間の平均値、バラツキを計算し、その傾向から警報
を発することも可能である。
For the cycle in which the patterns match,
Compare the duration of each step with the allowable duration of the judgment criteria, and for the step that does not fall within the allowable duration, the signal indicating a state different from the previous step, that is, the signal that caused the status of that step to be abnormal Is issued. Further, it is also possible to calculate the average value and the variation of the duration time from the data of a plurality of cycles and issue an alarm from the tendency.

【0020】パターンが一致しないサイクルについて
は、一致しない最初のステップと診断基準の対応するス
テップとのステータスを比較し、差異の認められる信号
に作動順序異常の警報を発する。故障停止に至らず、自
然回復して動作を継続したサイクルについては、異常の
ステップを取り除いてパターン比較を繰り返すことも可
能である。
For the cycles in which the patterns do not match, the statuses of the first step that does not match and the corresponding step of the diagnostic criteria are compared, and a signal indicating a difference is issued and an alarm indicating an abnormal operation sequence is issued. It is possible to remove the abnormal step and repeat the pattern comparison for the cycle in which the failure is not stopped and the operation is naturally recovered and the operation is continued.

【0021】診断基準のパターンと一致しない同一パタ
ーンの発生回数が増加することは故障停止に結びつく可
能性が高いので、発生率によって警報に重要度のランク
付けを行うこともできる。
Since the increase in the number of times of occurrence of the same pattern that does not match the diagnostic criterion pattern is likely to lead to a failure stop, it is possible to rank the alarms according to the occurrence rate.

【0022】[0022]

【発明の効果】本発明により、シーケンス制御信号を記
録することによって、信号に係わる機器の不調に起因す
るオン/オフ作動タイミングの乱れを検出できるため、
故障停止に至る前に要点検機器を指摘することができ
る。
According to the present invention, by recording the sequence control signal, it is possible to detect the disturbance of the on / off operation timing due to the malfunction of the equipment related to the signal.
It is possible to point out the equipment requiring inspection before the breakdown is stopped.

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

【図1】個別記録データの説明図である。FIG. 1 is an explanatory diagram of individual recording data.

【図2】最終ステータスの説明図である。FIG. 2 is an explanatory diagram of a final status.

【図3】ステータスと継続時間の説明図である。FIG. 3 is an explanatory diagram of status and duration.

【図4】診断基準の説明図である。FIG. 4 is an explanatory diagram of diagnostic criteria.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 シーケンス制御信号を構成する複数の信
号について、作動の都度、作動した信号の識別記号と、
作動前後または前後いずれか一方のオン/オフ状態と、
作動時刻または前回作動からの経過時間と、を計測した
データ(以下、個別計測データと称する)より、 同一時点の前記信号のオン/オフ状態を予め定められた
信号の順番に配置したオン/オフ状態データ(以下、ス
テータスと称する)を編集し、同一内容のステータスを
連続配置することなく内容の異なるステータスを予め定
められた順序で配置したステータス配置図(以下、パタ
ーンと称する)と、 パターン上の各ステータスの同一オン/オフ状態継続時
間(以下、継続時間と称する)の最大値と最小値を算出
し、ステータスと同じ順序で配置した許容継続時間と、 を作成して診断基準とし、同一形式へ変換した他時点の
計測データと、パターンの比較、および、各ステータス
継続時間の大小比較によって診断を行うことを特徴とす
るシーケンス制御回路診断方式。
1. A plurality of signals constituting a sequence control signal, each time it is activated, an identification symbol of the activated signal,
ON / OFF state before or after operation or before or after,
Based on the data obtained by measuring the operation time or the elapsed time from the previous operation (hereinafter referred to as individual measurement data), the ON / OFF state of the signal at the same time point is arranged in the order of a predetermined signal. A status layout diagram (hereinafter, referred to as a pattern) in which status data (hereinafter, referred to as a status) is edited and statuses having different contents are arranged in a predetermined order without continuously arranging statuses having the same content, and a pattern Calculate the maximum value and minimum value of the same on / off state duration (hereinafter referred to as duration) of each status of, and create an allowable duration that is arranged in the same order as the status, and set it as the diagnostic reference. A feature is that diagnosis is performed by comparing the measured data at another point converted to the format with the pattern and comparing the size of each status duration. Sequence control circuit diagnosis method.
JP4294707A 1992-09-22 1992-09-22 Diagnostic system for sequence control circuit Pending JPH06102927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4294707A JPH06102927A (en) 1992-09-22 1992-09-22 Diagnostic system for sequence control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4294707A JPH06102927A (en) 1992-09-22 1992-09-22 Diagnostic system for sequence control circuit

Publications (1)

Publication Number Publication Date
JPH06102927A true JPH06102927A (en) 1994-04-15

Family

ID=17811267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4294707A Pending JPH06102927A (en) 1992-09-22 1992-09-22 Diagnostic system for sequence control circuit

Country Status (1)

Country Link
JP (1) JPH06102927A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015197917A (en) * 2014-03-31 2015-11-09 三菱電機株式会社 Method for detecting abnormality in discrete manufacturing process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015197917A (en) * 2014-03-31 2015-11-09 三菱電機株式会社 Method for detecting abnormality in discrete manufacturing process

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