JP6173947B2 - Plant information communication apparatus and method, plant monitoring control system - Google Patents
Plant information communication apparatus and method, plant monitoring control system Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2223/00—Indexing scheme associated with group G05B23/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本発明は、プラントとその監視制御サーバが広域ネットワークを通じて接続されており、当該監視制御に係るプラント情報の通信手段に関するものである。 The present invention relates to a plant information communication means for monitoring and control, in which a plant and a monitoring control server thereof are connected through a wide area network.
従来、プラントの監視制御を遠隔地から行う手段として、例えば特許文献１に提案されている。これは、水処理プラントの監視制御において、プラントデータの受信や運転操作指令の作成・送信等を、広域ネットワークに繋がった遠隔Ｗｅｂ端末で行うものである。これにより、プラントの監視制御をプラントより離れた場所から可能としている。 Conventionally, for example, Patent Document 1 proposes a means for performing plant monitoring control from a remote location. In the monitoring control of a water treatment plant, reception of plant data and creation / transmission of an operation command are performed by a remote Web terminal connected to a wide area network. Thereby, the monitoring control of the plant is made possible from a place away from the plant.
しかしながら上記特許文献１に示されるシステムは、プラントと遠隔Ｗｅｂ端末を広域ネットワークでつなげているため、その通信状況の影響を受けやすい。特に帯域幅に対してデータ量が多い場合、プラントデータや運転指令を適切に受送信できず、プラント監視制御に影響を及ぼす可能性があった。 However, since the system disclosed in Patent Document 1 connects a plant and a remote Web terminal via a wide area network, it is easily affected by the communication status. In particular, when the amount of data is large with respect to the bandwidth, plant data and operation commands cannot be properly transmitted and received, which may affect plant monitoring control.
一方で、通信量を削減する為に送信するプラントデータを制限すると重要な当該データを送信できない可能性がある。 On the other hand, if the plant data to be transmitted is limited in order to reduce the communication amount, there is a possibility that important data cannot be transmitted.
そこで、本発明は上記課題を解決するためになされたものであり、ネットワークの回線状況に応じて、プラント監視制御によって生じる影響を最低限にしつつ、プラント情報の通信量を抑えることを目的としている。 Therefore, the present invention has been made to solve the above-described problems, and aims to suppress the communication amount of plant information while minimizing the influence caused by plant monitoring control according to the network line status. .
上記課題を解決する為に本発明は、プラントの監視制御に用いるプラント情報を、ネットワークを介して監視制御サーバに送信するプラント情報通信装置において、前記プラント情報ごとの送信周期及び重要度を格納するプラント値情報データベースと、前記ネットワークの通信速度を含む回線状況を取得する回線状況取得部と、前記回線状況に応じて許容される通信速度を所定の範囲で区分する通信カテゴリーを格納する通信速度データベースと、前記重要度及び前記通信カテゴリーに基づいて規定した送信周期の調整度を格納した送信周期データベースと、前記回線状況に応じて許容される通信速度を求め、前記通信速度から決定する前記通信カテゴリー及び前記重要度に基づいて、前記送信周期を前記調整度に応じて調整し、前記監視制御サーバに前記プラント情報を送信するプラント値選択送信部と、を備えることを特徴とする。 In order to solve the above-mentioned problems, the present invention stores a transmission cycle and importance for each plant information in a plant information communication apparatus that transmits plant information used for plant monitoring control to a monitoring control server via a network. A communication rate database for storing a plant value information database, a line status acquisition unit for acquiring a line status including the communication speed of the network, and a communication category for classifying communication speeds allowed according to the line status within a predetermined range. A transmission cycle database that stores a degree of adjustment of a transmission cycle defined based on the importance and the communication category, a communication rate that is allowed according to the line status, and the communication category that is determined from the communication rate And adjusting the transmission period according to the degree of adjustment based on the importance, and the monitoring And plant value selection transmitting unit that transmits the plant information in your server, characterized in that it comprises a.
また、本装置発明と対応する方法発明、及び本装置発明と連係する監視制御サーバを含むシステム発明も含まれる。 Further, a method invention corresponding to the device invention and a system invention including a monitoring control server linked to the device invention are also included.
本発明により、ネットワークの回線状況に応じて、プラント監視制御によって生じる影響を最小限にしつつ、プラント情報の通信量を抑えることで、通信データの欠落や通信速度の遅延を防ぐことができ、システム信頼性が向上する。 According to the present invention, the loss of communication data and the delay of the communication speed can be prevented by suppressing the communication amount of the plant information while minimizing the influence caused by the plant monitoring control according to the network line status. Reliability is improved.
本発明の実施形態の例を、図１乃至１１に基づいて説明する。尚、下記はあくまでも実施の例に過ぎず、下記具体的内容に発明自体が限定されることを意図する趣旨ではない。 Examples of embodiments of the present invention will be described with reference to FIGS. It should be noted that the following is merely an example of implementation and is not intended to limit the invention itself to the following specific contents.
図１は本発明の実施形態に係るプラント監視制御システムの全体構成図を示すものである。プラント側に置く入出力サーバ103は、制御対象101からプラント値を受け取り、広域ネットワーク122を通じて、監視制御サーバ115に送る。監視制御サーバ115はプラント値に基づいて各種監視制御指令を作成し、入出力サーバ103に送る。入出力サーバ103はそれに基づいて制御対象101を運転させる。 FIG. 1 is an overall configuration diagram of a plant monitoring control system according to an embodiment of the present invention. The input / output server 103 placed on the plant side receives the plant value from the control target 101 and sends it to the monitoring control server 115 through the wide area network 122. The monitoring control server 115 creates various monitoring control commands based on the plant value and sends them to the input / output server 103. Based on this, the input / output server 103 operates the control object 101.
入出力サーバ103はプラント値の現在値を格納する記憶部105を有し、プラント値更新部106が制御対象から値を受け取ってプラント現在値111を更新する。プラント値の送信はプラント選択送信部107が行う。プラント値の送信はプラント値ごとに定まった送信周期に沿って行われる。送信周期の情報は送信周期DB113に格納されている。なお周期はカウンタ102によって制御される。 The input / output server 103 has a storage unit 105 that stores the current value of the plant value, and the plant value update unit 106 receives the value from the control target and updates the plant current value 111. The plant selection transmission unit 107 transmits the plant value. The transmission of the plant value is performed along a transmission cycle determined for each plant value. Information on the transmission cycle is stored in the transmission cycle DB 113. The cycle is controlled by the counter 102.
プラント選択送信部107から送信されたプラント値はプラント値更新処理部119が受け取り、プラント現在値121に格納される。その後各種制御監視処理部118が制御監視DB120, プラント現在値121の情報に基づいて監視制御指令を作成し、入出力サーバ103に送信する。受信した監視制御指令に基づき制御対象101を運転させる役割を制御指令処理部108が担う。 The plant value transmitted from the plant selection / transmission unit 107 is received by the plant value update processing unit 119 and stored in the plant current value 121. Thereafter, the various control monitoring processing units 118 create a monitoring control command based on the information of the control monitoring DB 120 and the plant current value 121 and transmit it to the input / output server 103. The control command processing unit 108 plays a role of operating the control target 101 based on the received monitoring control command.
また回線状況に柔軟に対応するため、プラント値の送信周期は回線状況とプラント値情報DB110に格納されたプロセス値の重要度に基づいて自動で調整する。回線状況の取得は回線情報取得部109によって行われ、その状況は通信速度現在値112に格納される。その後プラント値選択送信部107が、プラント値情報DB110、プラント現在値111、通信速度現在値112、送信周期DB113及び通信速度DB 114の情報を利用し、送信周期を再計算する。 In order to flexibly cope with the line status, the plant value transmission cycle is automatically adjusted based on the line status and the importance of the process value stored in the plant value information DB 110. The line status is acquired by the line information acquisition unit 109, and the status is stored in the current communication speed value 112. Thereafter, the plant value selection / transmission unit 107 recalculates the transmission period by using the plant value information DB 110, the plant current value 111, the communication speed current value 112, the transmission period DB 113, and the communication speed DB 114.
さらに各プラント値の上下限値の情報をプラント値情報DB110に格納し、現在値が上下限値を超えた場合は優先的に送信を行う。同様に各プラント値の前回値との差分の許容範囲をプラント値情報DB110、現在値と前回値との差分をプラント現在値111に格納し、差分が許容範囲を超えた場合も優先的に送信を行う。 Furthermore, information on the upper and lower limit values of each plant value is stored in the plant value information DB 110, and when the current value exceeds the upper and lower limit values, transmission is performed with priority. Similarly, the allowable range of the difference between each plant value and the previous value is stored in the plant value information DB 110, and the difference between the current value and the previous value is stored in the plant current value 111. If the difference exceeds the allowable range, it is also transmitted with priority. I do.
さらに各プラント値に関連する警報の情報をプラント値情報DB110に格納し、その警報が発生した場合は、警報が復帰するまで優先的に送信を行う。 Further, alarm information related to each plant value is stored in the plant value information DB 110, and when the alarm occurs, transmission is performed preferentially until the alarm is restored.
続いて入出力サーバ103に格納するデータ形式について、図２乃至図５に基づいて説明する。 Next, the data format stored in the input / output server 103 will be described with reference to FIGS.
図２はプラント値情報DB110で格納するデータ形式例を示す。プラント値の信号IDと信号を発信する装置IDが関連付けられている。また各プラント値に、重要度、上下限値、許容差分、関連警報信号ID、データの取得・送信周期等を指定することができる。 FIG. 2 shows an example of a data format stored in the plant value information DB 110. The plant value signal ID is associated with the device ID that transmits the signal. In addition, importance, upper and lower limit values, allowable difference, related alarm signal ID, data acquisition / transmission cycle, and the like can be designated for each plant value.
図３は送信周期DB113で格納するデータ形式例を示す。回線速度とプラント値の重要度によって、送信周期をどう調節するかを指定する調整度を格納するデータ形式である。このDBでは、重要度が高いほど、送信周期が早いものとなっている。 FIG. 3 shows an example of a data format stored in the transmission cycle DB 113. It is a data format that stores the degree of adjustment that specifies how to adjust the transmission cycle according to the importance of the line speed and plant value. In this DB, the higher the importance, the faster the transmission cycle.
図４は通信速度DB114で格納するデータ形式例を示す。このDBでは、送信速度のカテゴリ定義しており、実際の通信速度がどのカテゴリに属するか区分している。 FIG. 4 shows an example of a data format stored in the communication speed DB 114. In this DB, the category of transmission speed is defined, and it is classified into which category the actual communication speed belongs.
図５はプラント現在値111で格納するデータ形式例を示す。プラント現在値の他に、前回送信値及び現在値との差分を格納する。 FIG. 5 shows an example of a data format for storing the plant current value 111. In addition to the plant current value, the difference between the previous transmission value and the current value is stored.
以下に本発明のプラント制御監視システムの動作フローについて、図６乃至図１１に基づいて説明する。 The operation flow of the plant control monitoring system of the present invention will be described below with reference to FIGS.
図６はプラント値選択送信部107の動作のフロー図である。プラント値情報DB110に記憶された送信周期となったか確認し（S602）、まず回線状況と重要度から送信周期を再計算する(S603)。再計算された送信周期に達していた場合、信号が送信される。達していなかった場合も、更に現在値が上下限値を逸脱しているか(S605)、前回値との差分が所定の閾値を逸脱するか(S606)、関連する警報が発生しているか(S607)を確認し、条件を満たした場合は信号を監視制御サーバに対して送信する（S608）。条件を満たさなかった場合はそのまま、全計器に対してこの走査を繰り返す（S601,S609）。このフローにより、問題が発生している信号を優先して制御監視サーバに送信し制御指令を作成することで、通信量を増やさずに当該問題を迅速に解決できる。 FIG. 6 is a flowchart of the operation of the plant value selection / transmission unit 107. It is confirmed whether or not the transmission cycle stored in the plant value information DB 110 is reached (S602). First, the transmission cycle is recalculated from the line status and importance (S603). If the recalculated transmission period has been reached, a signal is transmitted. Even if not, whether the current value deviates from the upper and lower limit values (S605), whether the difference from the previous value deviates from a predetermined threshold value (S606), or whether a related alarm has occurred (S607) ) And if the condition is satisfied, a signal is transmitted to the monitoring control server (S608). If the condition is not satisfied, this scanning is repeated for all the instruments as they are (S601, S609). This flow gives priority to a signal in which a problem has occurred and transmits it to the control monitoring server to create a control command, thereby quickly solving the problem without increasing the amount of communication.
図７はプラント値更新部106の動作のフロー図である。取得周期はプラント値情報DB110から取得し、取得周期に達した信号を制御対象101から取得する（S702）。その後プラント現在値111を更新する(S703)。取得周期に達していない場合は、全計器に対してこの走査を繰り返す(S701,S704)。 FIG. 7 is a flowchart of the operation of the plant value update unit 106. The acquisition cycle is acquired from the plant value information DB 110, and a signal that has reached the acquisition cycle is acquired from the control object 101 (S702). Thereafter, the plant current value 111 is updated (S703). If the acquisition cycle has not been reached, this scanning is repeated for all instruments (S701, S704).
図８は回線状況取得部109の動作のフロー図である。定めた処理周期毎（S801）に回線状況を取得（S802）し、通信速度現在値112に格納する。 FIG. 8 is a flowchart of the operation of the line status acquisition unit 109. The line status is acquired (S802) at every predetermined processing cycle (S801) and stored in the current communication speed value 112.
図９はプラント値更新処理部119の動作のフロー図である。入出力サーバ103から信号を受け取る毎（S901）に、プラント現在値121を更新する（S902）。 FIG. 9 is a flowchart of the operation of the plant value update processing unit 119. Every time a signal is received from the input / output server 103 (S901), the plant current value 121 is updated (S902).
図１０は制御指令処理部108の動作のフロー図である。監視制御サーバからの指令を受信し（S1001）、制御監視DB120,プラント現在値 121の情報を利用して指令を制御対象101に送信する(S1002)。 FIG. 10 is a flowchart of the operation of the control command processing unit 108. A command from the monitoring control server is received (S1001), and the command is transmitted to the controlled object 101 using the information of the control monitoring DB 120 and the plant current value 121 (S1002).
図１１は各種制御監視処理部118の動作のフロー図である。監視制御サーバ115から指令を送信する（S1102）前に、制御指令を計算する処理を行う（S1101）。 FIG. 11 is a flowchart of the operation of the various control monitoring processing unit 118. Before transmitting a command from the monitoring control server 115 (S1102), a process for calculating a control command is performed (S1101).
101 制御対象
102 カウンタ
103 入出力サーバ
104 処理部
105、117 記憶部
106 プラント値更新部
107 プラント値選択送信部
108 制御指令処理部
109 回線状況取得部
110 プラント値情報DB
111、121 プラント現在値
112 通信速度現在値
113 送信周期DB
114 通信速度DB
115 監視制御サーバ
116 処理部
118 各種制御監視処理部
119 プラント値更新処理部
120 制御監視DB
122 ネットワーク
101 Control target
102 counter
103 I / O server
104 Processing unit
105, 117 Memory unit
106 Plant value update section
107 Plant value selection transmitter
108 Control command processor
109 Line status acquisition department
110 Plant value information DB
111, 121 Plant current value
112 Communication speed current value
113 Transmission cycle DB
114 Communication speed DB
115 Monitoring and control server
116 processor
118 Various control monitoring processing units
119 Plant value update processing part
120 Control monitoring database
122 network
Claims (7)
前記プラント情報ごとの送信周期及び重要度を格納するプラント値情報データベースと、
前記ネットワークの通信速度を含む回線状況を取得する回線状況取得部と、
前記回線状況に応じて許容される通信速度を所定の範囲で区分する通信カテゴリーを格納する通信速度データベースと、
前記重要度及び前記通信カテゴリーに基づいて規定した送信周期の調整度を格納した送信周期データベースと、
前記回線状況に応じて許容される通信速度を求め、前記通信速度から決定する前記通信カテゴリー及び前記重要度に基づいて、前記送信周期を前記調整度に応じて調整し、前記監視制御サーバに前記プラント情報を送信するプラント値選択送信部と、を備えることを特徴とするプラント情報通信装置。 In a plant information communication device that transmits plant information used for plant monitoring control to a monitoring control server via a network,
A plant value information database for storing the transmission period and importance for each plant information;
A line status acquisition unit for acquiring a line status including a communication speed of the network;
A communication speed database for storing a communication category for classifying a communication speed allowed according to the line status within a predetermined range;
A transmission cycle database storing the adjustment degree of the transmission cycle defined based on the importance and the communication category;
Based on the communication category determined based on the communication speed and the importance, the transmission cycle is adjusted according to the adjustment degree, and the monitoring control server is configured to determine the allowable communication speed according to the line status. A plant value selection transmission unit for transmitting plant information.
前記プラント値情報データベースには、前記プラント情報ごとに送信可能な上下限値が含まれ、
前記プラント値選択送信部において、前記上下限値を逸脱する前記プラント情報を優先して送信する処理を行うことを特徴とするプラント情報通信装置。 In the plant information communication apparatus according to claim 1,
The plant value information database includes upper and lower limit values that can be transmitted for each plant information,
In the plant value selection transmission part, the plant information communication apparatus which performs processing which preferentially transmits the plant information deviating from the upper and lower limit values.
前記プラント値情報データベースには、前記プラント情報ごとに、前回送信したプラント情報と今回送信するプラント情報の差分閾値が含まれ、
前記プラント値選択送信部において、前記差分閾値を逸脱する前記今回送信するプラント情報を優先して送信することを特徴とするプラント情報通信装置。 In the plant information communication apparatus according to claim 2,
The plant value information database includes, for each plant information, a difference threshold between plant information transmitted last time and plant information transmitted this time,
In the plant value selection transmission unit, the plant information to be transmitted this time that deviates from the difference threshold is preferentially transmitted.
前記プラント値情報データベースには、前記プラント情報ごとに、警報情報を格納し、
前記プラント値選択送信部は、前記警報情報に関する警報が発生した場合、前記プラント情報を優先して送信することを特徴とするプラント情報通信装置。 In the plant information communication apparatus according to claim 3,
In the plant value information database, alarm information is stored for each plant information,
The plant value selection transmission unit preferentially transmits the plant information when an alarm related to the alarm information is generated.
前記プラント値選択送信部は、前記上下限値及び前記差分閾値を逸脱せず、かつ前記警報が発生しなかった前記プラント情報は、前記調整度に応じて調整した前記送信周期で前記監視制御サーバに送信することを特徴とするプラント情報通信装置。 In the plant information communication apparatus according to claim 4,
The plant value selection transmission unit does not deviate from the upper and lower limit values and the difference threshold value, and the plant information in which the alarm has not occurred is the monitoring control server at the transmission cycle adjusted according to the adjustment degree. A plant information communication device, characterized in that:
前記プラント情報通信装置から送信されたプラント情報に基づいて制御指令を作成し、前記プラント情報通信装置に前記制御指令を送信する監視制御サーバと、を備えるプラント監視制御システム。 The plant information communication apparatus according to any one of claims 1 to 5,
A plant monitoring control system comprising: a monitoring control server that creates a control command based on plant information transmitted from the plant information communication device and transmits the control command to the plant information communication device.
前記プラント情報ごとの送信周期及び重要度を格納するステップと、
前記ネットワークの通信速度を含む回線状況を取得するステップと、
前記回線状況に応じて許容される通信速度を所定の範囲で区分する通信カテゴリーを格納するステップと、
前記重要度及び前記通信カテゴリーに基づいて規定した送信周期の調整度を格納するステップと、
前記回線状況に応じて許容される通信速度を求め、前記通信速度から決定する前記通信カテゴリー及び前記重要度に基づいて、前記送信周期を前記調整度に応じて調整し、前記監視制御サーバに前記プラント情報を送信するステップと、を備えることを特徴とするプラント情報通信方法。 In a plant information communication method for transmitting plant information used for monitoring control of a plant to a monitoring control server via a network,
Storing the transmission period and importance for each plant information;
Obtaining a line status including a communication speed of the network;
Storing a communication category that divides a communication speed allowed according to the line status into a predetermined range;
Storing a degree of adjustment of a transmission cycle defined based on the importance and the communication category;
Based on the communication category determined based on the communication speed and the importance, the transmission cycle is adjusted according to the adjustment degree, and the monitoring control server is configured to determine the allowable communication speed according to the line status. A plant information communication method comprising: transmitting plant information.
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