JP2008020968A - Communication method of monitoring/control data - Google Patents

Communication method of monitoring/control data Download PDF

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JP2008020968A
JP2008020968A JP2006189928A JP2006189928A JP2008020968A JP 2008020968 A JP2008020968 A JP 2008020968A JP 2006189928 A JP2006189928 A JP 2006189928A JP 2006189928 A JP2006189928 A JP 2006189928A JP 2008020968 A JP2008020968 A JP 2008020968A
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monitoring
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Hiroto Narisawa
寛仁 成澤
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Electric Manufacturing Co Ltd
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<P>PROBLEM TO BE SOLVED: To perform high-speed data communication between sites without a device constitution for WAN line communication such as a program for WAN line communication. <P>SOLUTION: A monitoring/control device 1A in a site A transmits monitoring data to in-site devices 2A, 3A and 4A by broadcast transmission in LAN, and transmits control data to the in-site devices by individual transmission in LAN. A remote transmission device 4A extracts monitoring data showing state change, and WAN-transmits only the extracted monitoring data to another site. The remote transmission device adds route information to the control data, and transmits them to another site by WAN transmission. The route information is set by learning. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電力系統や水処理システムなどの大規模プラントの監視制御システムに係り、特に機場間をＷＡＮ接続した監視／制御データの通信方法に関する。   The present invention relates to a monitoring control system for a large-scale plant such as a power system and a water treatment system, and more particularly to a monitoring / control data communication method in which machines are connected by WAN.

プラントを監視制御するコンピュータシステム（以下監視制御装置と記す）のプラント監視情報の通信は、同一機場内に設置したシーケンサ等とのＬＡＮを介した通信と、他機場に設置したシーケンサ等とのＷＡＮを介した通信に大別できる。   Communication of plant monitoring information of a computer system (hereinafter referred to as a monitoring control device) for monitoring and controlling a plant is performed through communication with a sequencer installed in the same machine station via a LAN and a WAN installed with a sequencer installed in another machine station. It can be roughly divided into communication via

ＬＡＮは一般的に広帯域であり、リアルタイムデータのやりとりに適しており、ＷＡＮは狭帯域であり、リアルタイムデータのやりとりには適さない。   The LAN is generally wide-band and suitable for real-time data exchange, and the WAN is narrow-band and not suitable for real-time data exchange.

機場間で監視が必要なときに利用されるＷＡＮを介した通信では、ＷＡＮの両端に遠方監視用の親装置、子装置を設置し、特に重要な情報をプラント個別に抽出して伝送を行う（例えば、特許文献１参照）。また、監視容量が小さく、狭帯域回線でも十分伝送可能な場合には、単純にＬＡＮとＷＡＮの橋渡しをする装置を用いて直接に伝送する。   In communication via WAN, which is used when monitoring is required between aircraft, distant monitoring parent devices and child devices are installed at both ends of the WAN, and particularly important information is extracted for each plant and transmitted. (For example, refer to Patent Document 1). In addition, when the monitoring capacity is small and sufficient transmission is possible even with a narrow band line, transmission is performed directly using a device that simply bridges the LAN and WAN.

ＬＡＮを介した通信では、広帯域のメリットを生かし、装置間が疎結合となるよう、各装置が常時現在値データを同報送信（同一ネットワークの全装置が受信可能な送信）することが多い。
特開２００３−５８２３ In communication via a LAN, each device always transmits current value data by broadcast transmission (transmission that can be received by all devices on the same network) so that the devices can be loosely coupled by taking advantage of a wide band.
JP2003-5823

図２は、機場間をＷＡＮで接続したシステム構成例を示す。機場Ａおよび機場Ｂはそれぞれコンピュータ構成の監視制御装置１Ａ，１Ｂとシーケンサ２Ａ，３Ａ、２Ｂ，３ＢをＬＡＮで接続して同じ機場内の監視対象設備・機器を監視制御する。また、監視制御装置１Ａ，１ＢにはＷＡＮ回線通信用プログラムを実装し、機場ＡとＢにはそれぞれ遠方伝送装置４Ａ，４ＢをＬＡＮで接続し、モデム構成のターミナルアダプタ５Ａ，５Ｂを介してＷＡＮ回線による通信を可能にする。   FIG. 2 shows a system configuration example in which the machines are connected by a WAN. The machine station A and the machine station B connect the supervisory control devices 1A and 1B having a computer configuration and the sequencers 2A, 3A, 2B, and 3B via a LAN to monitor and control the monitoring target facilities and devices in the same machine station. Also, a WAN line communication program is installed in the supervisory control devices 1A and 1B, and remote transmission devices 4A and 4B are connected to the machine stations A and B via a LAN, respectively, and WANs are connected via modem-configured terminal adapters 5A and 5B. Enable communication over the line.

図２のように、規模の大きなプラントでは、機場間のデータの受け渡しをＷＡＮ回線で行う場合、ＷＡＮの帯域によって制限された情報のやりとりしか行えない。   As shown in FIG. 2, in the case of a large-scale plant, when data is exchanged between machine stations through a WAN line, only exchange of information limited by the WAN bandwidth can be performed.

また、狭帯域ＷＡＮによる通信を可能にするため、監視制御装置１Ａ，１ＢにはＷＡＮ回線通信用プログラムを実装し、このプログラムによってプラント固有のデータ構造やプラントにおける重要度により優先付け処理し、利用可能な帯域に見合った量のデータに変更するという特別の機能を用意する必要がある。   In addition, in order to enable communication by narrowband WAN, a supervisory control device 1A, 1B is equipped with a WAN line communication program, and this program prioritizes and uses the data structure unique to the plant and importance in the plant. It is necessary to prepare a special function to change the amount of data to match the possible bandwidth.

本発明の目的は、ＷＡＮ回線通信用プログラムなど、ＷＡＮ回線通信のための装置構成を不要にして機場間でデータの高速通信を可能にした監視／制御データの通信方法を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a monitoring / control data communication method that enables high-speed data communication between machines without using a device configuration for WAN line communication such as a WAN line communication program.

本発明は、前記の課題を解決するため、それぞれの機場で監視データの送信が必要な場合、機場内ＬＡＮ上での伝送は常時現在値同報送信で大きい伝送量で送信し、ＷＡＮとの接続点になる遠方伝送装置にはＬＡＮ上のデータを収集し、ＷＡＮ側に監視データに状態変化が有るときのみ、少ない伝送量になる監視データのみを送受信する。また、機場間で制御データの送信が必要な場合、ＬＡＮ−ＷＡＮ間の接続点に設置した遠方伝送装置が他機場側のネットワーク装置に対する経路情報を持つことにより、単純な伝送リレーのみにより他機場シーケンサへの制御送信を行う。したがって、本発明は、以下の方法を特徴とする。   In order to solve the above-mentioned problem, the present invention solves the above-mentioned problem. When monitoring data is required to be transmitted at each machine, transmission on the LAN in the machine is always performed with the current value broadcast transmission with a large transmission amount. Data on the LAN is collected in a remote transmission device that becomes a connection point, and only monitoring data with a small transmission amount is transmitted and received only when there is a change in the monitoring data on the WAN side. In addition, when it is necessary to transmit control data between the aircraft, the remote transmission device installed at the connection point between the LAN and WAN has the route information for the network device on the other aircraft side, so that only the simple transmission relay can be used. Sends control to the sequencer. Accordingly, the present invention is characterized by the following method.

（１）機場内の監視制御装置とシーケンサおよび遠方伝送装置間はＬＡＮ接続で監視データおよび制御データを送信し、他の機場とはＷＡＮ接続で監視データおよび制御データを送信する監視／制御データの通信方法であって、
前記監視制御装置は、機場内装置にＬＡＮ内同報送信で監視データを送信する過程と、機場内装置にＬＡＮ内個別送信で制御データを送信する過程を有し、
前記遠方伝送装置は、前記同報送信で受信した監視データのうち、状態変化有りの監視データを抽出し、この抽出した監視データのみを他の機場にＷＡＮ送信することを特徴とする。 (1) Monitoring data and control data are transmitted between the monitoring control device in the machine, the sequencer, and the remote transmission device via LAN connection, and monitoring data and control data are transmitted from other aircraft via WAN connection. A communication method,
The monitoring and control device has a process of transmitting monitoring data by LAN broadcast transmission to an in-machine device, and a process of transmitting control data by LAN individual transmission to the aircraft device,
The remote transmission apparatus extracts monitoring data with a state change from the monitoring data received by the broadcast transmission, and transmits only the extracted monitoring data to another aircraft by WAN.

（２）前記遠方伝送装置は、前記監視制御装置から受信した制御データに経路情報を付してＷＡＮ送信で他の機場に送信する過程を有することを特徴とする。   (2) The remote transmission device includes a process of adding route information to the control data received from the monitoring control device and transmitting the control data to another aircraft by WAN transmission.

なお、前記経路情報は、学習により設定することを特徴とする。   The route information is set by learning.

以上のとおり、本発明によれば、機場内装置にＬＡＮ内同報送信で監視データを送信し、機場内装置にＬＡＮ内を個別送信で制御データを送信し、監視データのうち状態変化有りの監視データのみを他の機場にＷＡＮ送信すること、および制御データに経路情報を付してＷＡＮ送信で他の機場に送信することとしたため、ＷＡＮ回線通信用プログラムなど、ＷＡＮ回線通信のための装置構成を不要にして機場間でデータの高速通信が可能になる。具体的には、以下の効果がある。   As described above, according to the present invention, the monitoring data is transmitted to the in-machine device by broadcast transmission within the LAN, the control data is transmitted to the in-machine device by individual transmission within the LAN, and there is a state change in the monitoring data. Since only monitoring data is transmitted to other aircraft by WAN, and route information is attached to control data and transmitted to other aircraft by WAN transmission, a device for WAN line communication such as a WAN line communication program. It is possible to perform high-speed data communication between machines without the need for a configuration. Specifically, the following effects are obtained.

（１）監視制御装置側にはＬＡＮ用の常時現在値受信のプログラムのみを実装・動作させ、狭帯域回線を介した監視が可能となる。   (1) Only a program for constantly receiving current values for LAN is installed and operated on the monitoring control device side, and monitoring via a narrowband line becomes possible.

（２）ＬＡＮ−ＷＡＮ結合点に設置する遠方伝送装置は、状態変化したデータのみを送信するため、プラント固有のデータ構造やデータの重要度・優制順位を考慮する必要がない。   (2) Since the remote transmission device installed at the LAN-WAN coupling point transmits only the data whose state has changed, it is not necessary to consider the data structure unique to the plant, the importance / preferential ranking of the data.

（３）同種のネットワーク構成を採る機場間を接続する場合、ＬＡＮ−ＷＡＮ結合点に設置する遠方伝送装置は他の装置と疎結合となり、他装置を運用したままで機場間を接続することができる。   (3) When connecting between machines having the same type of network configuration, the remote transmission device installed at the LAN-WAN coupling point is loosely coupled with other devices, and the machines can be connected while operating the other devices. it can.

（４）他機場のシーケンサに対する経路情報を学習し、自機場からの制御送信を単純中継することにより、制御送信の高速化を図ることができる。   (4) The speed of control transmission can be increased by learning the route information for the sequencer of the other machine field and simply relaying the control transmission from the own machine field.

図１は、本発明の実施形態を示すデータ通信処理手順を示し、図２に示す構成で機場Ａにおける監視制御装置１Ａ、シーケンサ２Ａ，３Ａ、遠方伝送装置４Ａの処理を中心にして示す。   FIG. 1 shows a data communication processing procedure showing an embodiment of the present invention, and mainly shows processing of the monitoring control device 1A, sequencers 2A and 3A, and remote transmission device 4A in the machine station A with the configuration shown in FIG.

シーケンサ２Ａ，３Ａは、監視制御対象設備・機器から一定周期で現在値の監視データを収集し（Ｓ１，Ｓ２）、監視制御装置１Ａに送信する。監視制御装置１Ａは、監視データの送信を行うときに、機場内同報送信でシーケンサ２Ａ，３Ａおよび遠方伝送装置４ＡにＬＡＮ高速送信する（Ｓ３）。   The sequencers 2A and 3A collect the monitoring data of the current value from the monitoring control target facility / equipment at a constant cycle (S1, S2) and transmit it to the monitoring control apparatus 1A. When transmitting the monitoring data, the monitoring control apparatus 1A transmits the LAN at a high speed to the sequencers 2A and 3A and the remote transmission apparatus 4A by in-field broadcast transmission (S3).

遠方伝送装置４Ａは、収集した監視データについて、状態変化有りのデータを抽出し、このデータのみをＷＡＮ送信で機場Ｂに送信する（Ｓ４）。機場Ｂの遠方伝送装置４Ｂは、ＷＡＮを通して受信した監視データを機場Ｂ内のＬＡＮによる高速通信で監視制御装置１Ｂに送信する。   The remote transmission device 4A extracts data with a state change from the collected monitoring data, and transmits only this data to the station B by WAN transmission (S4). The remote transmission device 4B in the machine station B transmits the monitoring data received through the WAN to the monitoring control apparatus 1B by high-speed communication using the LAN in the machine station B.

同様に、機場Ｂ内では監視データをＬＡＮ内高速送信を行い、この監視データから遠方伝送装置４Ｂで状態変化有りのデータのみを抽出してＷＡＮ送信で機場Ａ側に送信する。   Similarly, in the machine station B, monitoring data is transmitted at high speed in the LAN, and only the data with a state change is extracted from the monitoring data by the remote transmission device 4B and transmitted to the machine station A side by WAN transmission.

したがって、双方の機場Ａ，Ｂで監視データの送信が必要な場合、機場内ＬＡＮ上での伝送は常時現在値同報送信（伝送量大）とし、ＷＡＮとの接続点になる遠方伝送装置４Ａ，４ＢにはＬＡＮ上のデータを収集し、ＷＡＮ側に監視データに状態変化が有るときのみ、この少ない伝送量になる監視データのみを送受信する（Ｓ５）。   Therefore, when it is necessary to transmit monitoring data in both the machine stations A and B, the transmission on the LAN in the machine station is always the current value broadcast transmission (large transmission amount), and the remote transmission device 4A serving as a connection point with the WAN. , 4B collects data on the LAN, and transmits and receives only the monitoring data having this small transmission amount only when there is a change in the monitoring data on the WAN side (S5).

次に、監視制御装置１Ａは、制御データの送信を必要とするときに、機場内では制御データをＬＡＮ内個別送信を行う（Ｓ６）。この制御データを機場Ｂに送信するとき、遠方伝送装置４Ａは、制御データに経路情報を付して機場Ｂ側にＷＡＮ送信する（Ｓ７）。機場Ｂの遠方伝送装置４Ｂは、受信した制御データがもつ経路情報が示す装置（シーケンサ２Ｂ，３Ｂなど）にＬＡＮ送信する。なお、経路情報は、予め設定しておくことができるが、制御データの送信先情報を基にした学習によって自動設定するのが好ましい。   Next, when it is necessary to transmit control data, the monitoring control apparatus 1A performs individual transmission of control data within the LAN within the machine (S6). When this control data is transmitted to the machine station B, the remote transmission device 4A attaches route information to the control data and transmits the WAN to the machine station B (S7). The remote transmission device 4B in the machine station B transmits the LAN to the device (sequencer 2B, 3B, etc.) indicated by the route information included in the received control data. The route information can be set in advance, but is preferably set automatically by learning based on the transmission destination information of the control data.

同様に、機場Ｂから機場Ａに制御データを送信する場合には、遠方伝送装置４Ｂに送信された制御データに付された経路情報が示す装置（シーケンサ２Ａ，３Ａなど）にＬＡＮ送信する（Ｓ８）。   Similarly, when the control data is transmitted from the machine station B to the machine station A, LAN transmission is performed to a device (sequencer 2A, 3A, etc.) indicated by the route information attached to the control data transmitted to the remote transmission device 4B (S8). ).

したがって、双方の機場Ａ，Ｂで制御データの送信が必要な場合、ＬＡＮ−ＷＡＮ間の接続点に設置した遠方伝送装置が他機場側のネットワーク装置に対する経路情報を持つことにより、単純な伝送リレーのみにより他機場シーケンサへの制御送信を行う。   Therefore, when it is necessary to transmit control data in both the aircraft stations A and B, the remote transmission device installed at the connection point between the LAN and the WAN has route information for the network device on the other aircraft side, so that a simple transmission relay Sends control to other aircraft sequencer only by

以上のことから、本実施形態は、監視制御装置側にはＬＡＮ用の常時現在値受信のプログラムのみを実装・動作させ、狭帯域になるＷＡＮ回線を介した監視が可能となる。   As described above, according to the present embodiment, only the LAN always current value reception program is installed and operated on the monitoring control device side, and monitoring via the WAN line having a narrow band becomes possible.

また、ＬＡＮ−ＷＡＮ結合点に設置する遠方伝送装置は、状態変化したデータのみを送信するため、プラント固有のデータ構造やデータの重要度・優制順位を考慮する必要がない。   Further, since the remote transmission device installed at the LAN-WAN connection point transmits only the data whose state has changed, it is not necessary to consider the data structure unique to the plant, the importance / preferential ranking of the data.

また、同種のネットワーク構成を採る機場間を接続する場合、ＬＡＮ−ＷＡＮ結合点に設置する遠方伝送装置は他方の装置と疎結合となり、他方の装置を運用したままで機場間を接続することができる。   In addition, when connecting machines that use the same type of network configuration, the remote transmission device installed at the LAN-WAN coupling point is loosely coupled to the other device, and the machines can be connected while the other device is operated. it can.

また、他機場のシーケンサに対する経路情報を学習し、自機場からの制御送信を単純中継することにより、制御データの高速送信を図ることができる。   In addition, it is possible to achieve high-speed transmission of control data by learning route information for a sequencer in another machine field and simply relaying control transmission from the own machine field.

本発明の実施形態を示すデータ通信処理手順図。The data communication processing procedure figure which shows embodiment of this invention. 機場間接続した監視制御システムの構成図。The block diagram of the monitoring control system connected between machines.

符号の説明Explanation of symbols

１Ａ，１Ｂ 監視制御装置
２Ａ，２Ｂ、３Ａ，３Ｂ シーケンサ
４Ａ，４Ｂ 遠方伝送装置
５Ａ，５Ｂ モデム
1A, 1B Monitoring and control device 2A, 2B, 3A, 3B Sequencer 4A, 4B Remote transmission device 5A, 5B Modem

Claims (2)

機場内の監視制御装置とシーケンサおよび遠方伝送装置間はＬＡＮ接続で監視データおよび制御データを送信し、他の機場とはＷＡＮ接続で監視データおよび制御データを送信する監視／制御データの通信方法であって、
前記監視制御装置は、機場内装置にＬＡＮ内同報送信で監視データを送信する過程と、機場内装置にＬＡＮ内個別送信で制御データを送信する過程を有し、
前記遠方伝送装置は、前記同報送信で受信した監視データのうち、状態変化有りの監視データを抽出し、この抽出した監視データのみを他の機場にＷＡＮ送信することを特徴とする監視／制御データの通信方法。 A monitoring / control data communication method in which monitoring data and control data are transmitted via LAN connection between the monitoring control device and the sequencer and the remote transmission device in the machine, and monitoring data and control data are transmitted via WAN connection to other machines. There,
The monitoring and control device has a process of transmitting monitoring data by LAN broadcast transmission to an in-machine device, and a process of transmitting control data by LAN individual transmission to the aircraft device,
The remote transmission apparatus extracts monitoring data with a state change from the monitoring data received by the broadcast transmission, and transmits only the extracted monitoring data to another aircraft by WAN. Data communication method. 前記遠方伝送装置は、前記監視制御装置から受信した制御データに経路情報を付してＷＡＮ送信で他の機場に送信する過程を有することを特徴とする請求項１に記載の監視／制御データの通信方法。
The monitoring / control data according to claim 1, wherein the remote transmission device includes a process of adding route information to the control data received from the monitoring control device and transmitting the control data to another aircraft by WAN transmission. Communication method.
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JPH11175139A (en) * 1997-12-10 1999-07-02 Toshiba Corp System and method for monitoring and controlling plant
JP2000003214A (en) * 1998-06-15 2000-01-07 Toshiba Corp Distributed control system
JP2003233416A (en) * 2002-02-07 2003-08-22 Toshiba Corp Piping data collection device, piping data monitoring device, piping monitoring system

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