JPH0332954B2 - - Google Patents
Info
- Publication number
- JPH0332954B2 JPH0332954B2 JP59102590A JP10259084A JPH0332954B2 JP H0332954 B2 JPH0332954 B2 JP H0332954B2 JP 59102590 A JP59102590 A JP 59102590A JP 10259084 A JP10259084 A JP 10259084A JP H0332954 B2 JPH0332954 B2 JP H0332954B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- measurement
- circuit
- control
- transmission
- 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.)
- Expired
Links
- 238000005259 measurement Methods 0.000 claims description 54
- 230000005540 biological transmission Effects 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 16
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 16
- 238000012545 processing Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、遠方監視制御装置に係り、特に、計
測信号を高速に伝送する情報伝送方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a remote monitoring and control device, and particularly to an information transmission method for transmitting measurement signals at high speed.
遠方監視制御装置では、第１図に示すように、
制御対象機器４の表示信号１６および計測信号１
７を制御表示計測処理回路１４で取り込み、デー
タバス１３により、送受信処理回路１２から表示
伝送回線６を介して表示計測信号を親局（制御所
装置）２へ伝送する子局（被制御所装置）３と表
示計測信号を送受信処理回路８で受信し、データ
バス１０を介して制御表示処理回路１１へ出力し
表示計測信号を監視制御盤１に表示する親局２よ
り構成される。親局２は計算機結合回路９により
計算機７へ表示計測信号を出力し、計算機７から
の制御信号を受信する。監視制御盤１からの制御
信号は制御表示処理回路１１で受信し、データバ
ス１０により送受信回路８から制御伝送回線５を
介して子局３へ伝送する。子局３では制御信号を
送受信処理回路１２で受信し、データバス１３を
介して制御表示計測処理回路１４から制御対象機
器４へ制御信号１５を出力し機器を制御する。こ
の場合の制御信号および表示、計測信号はサイク
リツクに伝送されるのが一般的であり、この時の
伝送フオーマツトを第２図に示す。制御信号は第
２図のように同期ワードとそれに続く制御ワー
ドC1で構成され、この二ワードがサイクリツク
に伝送される。このうち同期ワードフオーマツト
は第２図のように第１ビツトと44ビツト目が１
で残り42ビツトが０であり、制御ワードのデータ
サンプリングのために使用する。また制御ワード
C1フオーマツトは同図ｂのように制御ワード
を識別するためのワードアドレス６ビツト、フラ
グビツト２ビツト、群選択５ビツト、個別選択５
ビツト、操作信号３ビツトとパリテイビツト１ビ
ツトとパリテイビツト１ビツトを除く21ビツトの
反転ビツト21ビツト及び反転ビツト21ビツトに対
するパリテイビツト１ビツトで構成される。
In the remote monitoring and control device, as shown in Figure 1,
Display signal 16 and measurement signal 1 of controlled device 4
7 is taken in by the control display measurement processing circuit 14, and the display measurement signal is transmitted from the transmission/reception processing circuit 12 to the master station (control center device) 2 via the data bus 13 via the display transmission line 6. ) 3 and a display measurement signal by a transmitting/receiving processing circuit 8, outputting it to a control display processing circuit 11 via a data bus 10, and displaying the display measurement signal on a monitoring control panel 1. The master station 2 outputs a display measurement signal to the computer 7 through the computer coupling circuit 9, and receives a control signal from the computer 7. A control signal from the supervisory control panel 1 is received by a control display processing circuit 11, and is transmitted from a transmitter/receiver circuit 8 to a slave station 3 via a control transmission line 5 via a data bus 10. In the slave station 3, the transmission/reception processing circuit 12 receives the control signal, and the control display/measurement processing circuit 14 outputs the control signal 15 to the controlled device 4 via the data bus 13 to control the device. In this case, the control signal, display, and measurement signal are generally transmitted cyclically, and the transmission format at this time is shown in FIG. The control signal consists of a synchronization word followed by a control word C1 as shown in FIG. 2, and these two words are transmitted cyclically. Of these, in the synchronous word format, the 1st and 44th bits are 1 as shown in Figure 2.
The remaining 42 bits are 0 and are used for data sampling of the control word. Also the control word
The C1 format consists of 6 bits of word address for identifying the control word, 2 bits of flag bits, 5 bits of group selection, and 5 bits of individual selection, as shown in figure b.
It consists of 3 operation signal bits, 1 parity bit, 21 inverted bits of 21 bits excluding the 1 parity bit, and 1 parity bit for each of the 21 inverted bits.
表示計測信号は第２図のように同期ワード１
ワードと表示、計測の情報ワードD1〜Doにより
構成される。このうち表示ワードフオーマツトは
同図ａのようにワードアドレス６ビツト、フラ
グ２ビツト、アイドル３ビツト、表示データ10ビ
ツト、パリテイビツトと既パリテイビツト１ビツ
トを除く21ビツトの反転ビツト21ビツトと反転ビ
ツト21ビツトに対するパリテイ１ビツトで構成さ
れる。表示データは１ビツトで１又は０の二値情
報を表わす。計測ワードフオーマツトは同図ｂ
のようにワードアドレス６ビツト、フラグ２ビツ
ト、サイン１ビツト、とデータ12ビツト（BCD
三桁又はバイナリイ12ビツト）、パリテイ１ビツ
ト、既パリテイ１ビツトを除く21ビツトの反転ビ
ツト21ビツトと反転ビツト21ビツトに対するパリ
テイ１ビツトで構成される。計測信号は１項目１
ワードを使用し現状値を伝送する。最近の制御対
象機器の規模の増大により、制御所で監視する表
示、計測項目数が増え、１計測項目を１ワードで
常時伝送をすると伝送時間が長くなるため、制御
所での計測信号の更新時間をできるだけ短くした
いというニーズが高まつてきている。伝送時間を
短くする方式には、表示信号に対する優先伝送方
式が従来採用されている。この優先伝送方式は、
二値状態の表示信号のONからOFF又はOFFから
ONの状態変化を子局３で検出し、状態変化のあ
つた表示ワードを他の情報ワードより優先的に一
定回数連続して伝送し、状態変化信号を早く親局
２へ連絡する方式である。しかし、計測項目は常
時連続的に変化すること及びアナログ信号をデイ
ジタル信号に変換して伝送をするためにアナロ
グ／デイジタル変換器（Ａ／Ｄ変換器）の最下位
１ビツトの誤差がさけられず、計測値の変化によ
り優先伝送を行なうほとんど全計測項目が常時優
先伝送となるため採用できなかつた。 The display measurement signal is synchronization word 1 as shown in Figure 2.
It is composed of words, display, and measurement information words D 1 to D o . Of these, the display word format is as shown in figure a: 6 bits for word address, 2 bits for flag, 3 bits for idle, 10 bits for display data, 21 inverted bits excluding parity bit and 1 already parity bit, and 21 inverted bits. The parity for each bit consists of one bit. The display data represents binary information of 1 or 0 with 1 bit. The measurement word format is shown in figure b.
6 bits of word address, 2 bits of flag, 1 bit of sign, and 12 bits of data (BCD
It consists of 3-digit or binary bits (12 bits), 1 parity bit, 21 inverted bits of 21 bits excluding the existing 1 parity bit, and 1 parity bit for the 21 inverted bits. Measurement signal is 1 item 1
Transmit the current value using words. Due to the recent increase in the scale of controlled equipment, the number of displays and measurement items to be monitored at the control center has increased, and if one measurement item is constantly transmitted in one word, the transmission time will be longer, so the measurement signal at the control center must be updated. The need to shorten the time as much as possible is increasing. As a method for shortening transmission time, a priority transmission method for display signals has conventionally been adopted. This priority transmission method is
From ON to OFF or from OFF to binary state display signal
This method detects a change in the ON status at the slave station 3, transmits the display word with the status change in priority over other information words a certain number of times in succession, and quickly communicates the status change signal to the master station 2. . However, measurement items change continuously at all times, and because analog signals are converted into digital signals and transmitted, errors in the lowest 1 bit of the analog/digital converter (A/D converter) cannot be avoided. This method could not be adopted because almost all measurement items that require priority transmission due to changes in measured values always undergo priority transmission.
本発明の目的は計測信号の状態変化を高速に伝
送する情報伝送方式を提供するにある。
An object of the present invention is to provide an information transmission system that transmits state changes of measurement signals at high speed.
本発明は子局で計測値の一定量以上の変化検出
を行ない、変化を検出した計測信号のみを親局へ
繰返し伝送し、親局で既計測信号を受信後、応答
信号を子局に返信し、子局ではこの応答信号を親
局から受信後、該当する計測信号の繰返し送信を
停止することにより、計測信号の高速伝送を可能
とする情報伝送方式である。
The present invention detects a change in the measured value by a certain amount or more at the slave station, repeatedly transmits only the measurement signal for which a change has been detected to the master station, and after receiving the already measured signal at the master station, returns a response signal to the slave station. However, after receiving this response signal from the master station, the slave station stops repeating the transmission of the corresponding measurement signal, thereby making it possible to transmit the measurement signal at high speed.
第１図の遠方監視制御装置構成図の子局３で
は、制御対象機器４からの計測信号１７を制御表
示計測処理回路１２で取込み、前回取込んだ数値
と比較し、一定ビツト数以上の変化を変化検出回
路１８で検出する。変化検出回路１８で変化を検
出した場合に、該当する計測信号を第３図の伝
送フオーマツトで親局２へ伝送するが、このフオ
ーマツトによれば表示計測信号は要するに同期ワ
ード１ワードに引き続き、状変計測信号（図の例
ではTMkとTMl）を伝送するものであり、かつ
同期ワードと計測信号より成るフオーマツトが繰
返し伝送される。なお計測信号自体のフオーマツ
ト（第３図ａ）は第２図ｂの従来フオーマツ
トと同様である。第３図では計測の変化データ
がTMkとTMlの二ワードある場合を示している
がこれに限らず、変化検出した計測信号は全て連
続してかつ繰返し伝送する。
In the slave station 3 in the configuration diagram of the remote monitoring and control device shown in FIG. is detected by the change detection circuit 18. When the change detection circuit 18 detects a change, the corresponding measurement signal is transmitted to the master station 2 in the transmission format shown in FIG. It is for transmitting variable measurement signals (TMk and TMl in the example shown), and a format consisting of a synchronization word and a measurement signal is repeatedly transmitted. The format of the measurement signal itself (FIG. 3a) is the same as the conventional format shown in FIG. 2B. Although FIG. 3 shows a case where the measurement change data includes two words TMk and TMl, the present invention is not limited to this, and all measurement signals for which change has been detected are transmitted continuously and repeatedly.
本発明の伝送フオーマツトについてより詳細に
説明すると、まず制御信号は変化データを受信時
には第３図左のように同期１ワード、制御信号
１ワードC1に引き継ぎ受信済ワードアドレスを
連絡する受信済ワードアドレス連絡信号C2から
構成する。変化データを受信しないときの制御信
号フオーマツトは第３図右のようであり、この
ときのフオーマツトは従来とほぼ同じである。そ
して本発明による受信済ワードアドレス連絡信号
C2は、第３図ｂのようにワードアドレス６ビ
ツト、フラグ２ビツト、アイドル１ビツト、受信
済ワードアドレス１及び２の各６ビツト、パリテ
イ１ビツト、パリテイ１ビツトを除く反転ビツト
21ビツト、反転ビツトに対するパリテイ１ビツト
から構成する。しかして、子局３から計測信号を
受信後、親局２では第３図ｂのC2信号の受信
済ワードアドレス１又は２に子局３から送信され
てきた計測信号TMk，TMlのワードアドレスを
乗せて子局３に返送する。子局３ではC2信号の
受信済ワードアドレス１及び２を受信後、受信済
ワードアドレスと一致する計測信号の繰返し送信
を停止する。 To explain the transmission format of the present invention in more detail, first, when receiving change data, the control signal is transferred to the synchronization 1 word and the control signal 1 word C1 as shown on the left in Fig. 3.The received word is used to notify the received word address. Consists of address contact signal C2 . The control signal format when no change data is received is as shown on the right side of FIG. 3, and the format at this time is almost the same as the conventional one. and a received word address contact signal according to the present invention.
C2 consists of 6 word address bits, 2 flag bits, 1 idle bit, 6 bits each of received word addresses 1 and 2, 1 parity bit, and inverted bits excluding the parity 1 bit, as shown in Figure 3b.
Consists of 21 bits, 1 parity bit for an inverted bit. After receiving the measurement signal from the slave station 3, the master station 2 changes the received word address 1 or 2 of the C2 signal in Figure 3b to the word address of the measurement signal TMk, TMl transmitted from the slave station 3. and returns it to slave station 3. After receiving the received word addresses 1 and 2 of the C 2 signal, the slave station 3 stops repeatedly transmitting the measurement signal that matches the received word address.
第４図はワードアドレスｋとｌの計測信号の数
値変化が発生し、子局３より親局２へ前述の手順
でデータ伝送後ワードアドレスｍの計測信号の伝
送を行なつた場合のデータ伝送手順を示す。変化
データがない場合は、同期信号を連続して伝送す
る。 Figure 4 shows data transmission when a numerical change occurs in the measurement signals of word addresses k and l, and after the data is transmitted from slave station 3 to master station 2 in the above-mentioned procedure, the measurement signal of word address m is transmitted. Show the steps. If there is no change data, the synchronization signal is transmitted continuously.
次に、子局３における一定ビツト巾について説
明する。計測信号はアナログ量をデイジタル量に
変換するために一次変換器及びＡ／Ｄ変換器を介
してデイジタル信号に変換している。このため、
一次変換器とＡ／Ｄ変換器の精度とＡ／Ｄ変換器
の最下位桁の１ビツトの誤差がさけられない。一
般に、計測量のデイジタル伝送における精度は±
１％〜±1.5％が要求されており、デイジタル伝
送信号BCD三桁の場合000〜±999に対して最大
±10〜±15ビツトの誤差が見込まれるため、子局
３の状変検出回路１８では±10〜±15ビツト以内
で数値変化巾を設定すればよい。 Next, the constant bit width in the slave station 3 will be explained. The measurement signal is converted into a digital signal via a primary converter and an A/D converter to convert an analog quantity into a digital quantity. For this reason,
Accuracy of the primary converter and A/D converter and 1-bit error in the least significant digit of the A/D converter are unavoidable. In general, the accuracy of digital transmission of measured quantities is ±
1% to ±1.5% is required, and in the case of a three-digit digital transmission signal BCD, a maximum error of ±10 to ±15 bits is expected for 000 to ±999. Then, it is sufficient to set the range of numerical change within ±10 to ±15 bits.
本発明によると制御所の監視制御盤１で計測信
号のLED表示を行なう場合、従来の１ビツトの
変化によるLEDの表示のちらつきを防止するた
めの制御表示処理回路１１で一定ビツト巾の変化
を検出後、LEDへの表示データを出力する処理
が不要となる。 According to the present invention, when a measurement signal is displayed on an LED display on a supervisory control panel 1 in a control center, a control display processing circuit 11 is used to display a change in a constant bit width in order to prevent the LED display from flickering due to a 1-bit change in the conventional method. After detection, there is no need to output display data to the LED.
次に、本発明による計測情報伝送方式における
イニシヤルデータの伝送について説明する。子局
３で、電源立上げや装置故障回復時には、イニシ
ヤルデータとして全計測信号を親局２へ伝送す
る。又、親局２の電源立上げ時や装置故障回復時
及び全計測信号のデータリフレツシユ要求がある
場合は、第３図の制御信号C1信号のイニシヤル
起動ビツトＩを１にして子局３へ連絡し全データ
の送信要求を行なう。本実施例では応答信号とし
てワードアドレス信号を返信する方式で説明した
が応答信号はこれに限らず、フラグ信号他の信号
でも可能である。又、本実施例ではサイクリツク
伝送方式で説明したが、これに限らず、変化時伝
送方式、例えば、HDLC（ハイレベルデータ制御
手順）伝送方式等の通信制御方式でも、計数値は
従来一定周期で伝送しているが、本発明の子局３
での計数値の一定量以上の変化検出により変化を
検出した計測値のみ伝送することにより、計数値
の高速伝送が可能である。 Next, transmission of initial data in the measurement information transmission method according to the present invention will be explained. The slave station 3 transmits all measurement signals to the master station 2 as initial data when turning on the power or recovering from a device failure. Also, when powering up the master station 2, recovering from a device failure, or when there is a data refresh request for all measurement signals, set the initial start bit I of the control signal C1 signal in FIG. Contact and request for all data to be sent. In this embodiment, a method has been described in which a word address signal is returned as a response signal, but the response signal is not limited to this, and other signals such as a flag signal may also be used. Furthermore, in this embodiment, the cyclic transmission method has been explained, but the count value is not limited to this, and even in communication control methods such as the transmission method when changing, for example, the HDLC (high-level data control procedure) transmission method, the count value is conventionally calculated at a constant cycle. Although the slave station 3 of the present invention is transmitting
By transmitting only the measured values for which a change has been detected by detecting a change in the counted value by a certain amount or more, high-speed transmission of the counted value is possible.
第５図は本発明による遠方監視制御装置の構成
例を示す。制御対象機器４からの計測信号１７を
走査回路１９で取込みＡ／Ｄ変換器２０でデイジ
タル信号２１に変換する。走査カウンタ２５は
０、１、２、…とカウントするカウンタで走査回
路１９に対て複数の計測信号１７のどの信号を取
込むかを決める走査アドレス信号２６を出力し、
全計測信号を記憶している記憶回路２２に走査ア
ドレス信号２６を出力する。記憶回路２２では走
査アドレス信号２６に対応する計測信号の記憶デ
ータ２３を変化検出回路１８へ出力する。変化検
出回路１８では記憶データ２３とＡ／Ｄ変換器２
０の出力である計測データ２１との比較を行な
い、一定巾以上の変化を検出した時に、変化検出
信号２４を送信信号記憶回路２８へ出力する。送
信信号記憶回路２８は変化検出信号２４により、
計測データ２１と走査カウンタ２５の出力である
ワードアドレス信号２７を記憶し、並列／直列変
換回路２９に出力する。送信記憶回路２８は直
列／並列変換回路３０から出力される受信済ワー
ドアドレス信号３１により該当するワードアドレ
スの送信信号の記憶をリセツトする。又、記憶回
路２２は変化検出回路１８からの変化検出信号２
４の入力時走査アドレス信号に対応する記憶デー
タをＡ／Ｄ変換回路２０の出力である計測データ
２１に置き換えて新しい記憶データとする。並
列／直列変換回路２９からの送信信号は表示伝送
回線６を介して親局２の直列／並列変換回路３４
で並列信号に変換されワードアドレス検出回路３
５へ入力される。ワードアドレス検出回路３５
は、直列／並列変換回路３４より入力された並列
信号よりワードアドレス信号を検出し、送信カウ
ンタ３８へワードアドレス検出信号３７を出力す
る。送信カウンタ３８はワードアドレス検出信号
３７が入力されない場合は、制御信号のワードア
ドレスのみを繰り返し出力し、ワードアドレス３
７が入力された場合は、制御信号のワードアドレ
スに引き継き受信済のワードアドレスを出力す
る。受信済ワードアドレス記憶回路４１は、ワー
ドアドレス検出回路３５からの受信ワードアドレ
ス信号４０を記憶し、記憶したワードアドレス信
号を受信済ワードアドレス信号４２として走査回
路４３へ出力する。走査回路４３は送信カウンタ
３８からの送信ワードアドレス信号３９が制御信
号用ワードアドレスの場合は、符号化回路４９か
らの信号を取り込み、並列／直列変換回路４４へ
出力する。送信ワードアドレス信号３９が受信済
ワードアドレス信号の場合、走査回路４３は受信
済ワードアドレス信号４２を取り込み、並列／直
列変換回路４４へ出力する。符号化回路４９は監
視制御盤１のスイツチ接点４８を取り込み、制御
フオーマツトで定めて符号化信号に変換する。ワ
ードアドレス検出回路３５は直列／並列変換回路
３４から入力された受信ワードアドレス信号４０
と受信データ３６を分配回路４５へ出力する。分
配回路４５は受信ワードアドレス信号４０のアド
レスNoに該当する記憶回路４６に受信データ３
６を出力する。記憶回路４６は記憶データを表示
器４７へ出力する。並列／直列変換回路４４から
の送信信号は制御伝送回線５を介して子局３の直
列／並列変換回路３０に入力される。直列／並列
変換回路３０は制御ワードアドレス（第３図の
C1のワードアドレス）を受信時は制御信号を復
号化回路３２へ出力する。受信済ワードアドレス
（第３図のC2のワードアドレス）の場合は、受信
済ワードアドレス信号３１を送信信号記憶回路２
８へ出力する。 FIG. 5 shows an example of the configuration of a remote monitoring and control device according to the present invention. A measurement signal 17 from the device 4 to be controlled is taken in by a scanning circuit 19 and converted into a digital signal 21 by an A/D converter 20 . The scanning counter 25 is a counter that counts 0, 1, 2, . . . and outputs a scanning address signal 26 to the scanning circuit 19 to determine which of the plurality of measurement signals 17 is to be captured.
A scanning address signal 26 is output to a storage circuit 22 that stores all measurement signals. The storage circuit 22 outputs stored data 23 of the measurement signal corresponding to the scanning address signal 26 to the change detection circuit 18 . In the change detection circuit 18, the stored data 23 and the A/D converter 2
A comparison is made with measurement data 21 which is an output of 0, and when a change of a certain width or more is detected, a change detection signal 24 is output to the transmission signal storage circuit 28. The transmission signal storage circuit 28 uses the change detection signal 24 to
The measurement data 21 and the word address signal 27 which is the output of the scanning counter 25 are stored and output to the parallel/serial conversion circuit 29. The transmission storage circuit 28 uses the received word address signal 31 outputted from the serial/parallel conversion circuit 30 to reset the storage of the transmission signal of the corresponding word address. Further, the memory circuit 22 receives the change detection signal 2 from the change detection circuit 18.
The stored data corresponding to the input scan address signal No. 4 is replaced with the measurement data 21 which is the output of the A/D conversion circuit 20, and is used as new stored data. The transmission signal from the parallel/serial conversion circuit 29 is transmitted to the serial/parallel conversion circuit 34 of the master station 2 via the display transmission line 6.
is converted into a parallel signal by the word address detection circuit 3.
5. Word address detection circuit 35
detects a word address signal from the parallel signal input from the serial/parallel conversion circuit 34 and outputs a word address detection signal 37 to the transmission counter 38. When the word address detection signal 37 is not input, the transmission counter 38 repeatedly outputs only the word address of the control signal, and the word address 3
If 7 is input, the word address of the control signal is taken over and the received word address is output. The received word address storage circuit 41 stores the received word address signal 40 from the word address detection circuit 35 and outputs the stored word address signal to the scanning circuit 43 as a received word address signal 42. When the transmission word address signal 39 from the transmission counter 38 is a control signal word address, the scanning circuit 43 takes in the signal from the encoding circuit 49 and outputs it to the parallel/serial conversion circuit 44 . When the transmitted word address signal 39 is a received word address signal, the scanning circuit 43 takes in the received word address signal 42 and outputs it to the parallel/serial conversion circuit 44 . The encoding circuit 49 takes in the switch contact 48 of the supervisory control panel 1, determines the control format, and converts it into an encoded signal. The word address detection circuit 35 receives the received word address signal 40 inputted from the serial/parallel conversion circuit 34.
and the received data 36 are output to the distribution circuit 45. The distribution circuit 45 sends the received data 3 to the storage circuit 46 corresponding to the address No. of the received word address signal 40.
Outputs 6. Storage circuit 46 outputs stored data to display 47. The transmission signal from the parallel/serial conversion circuit 44 is input to the serial/parallel conversion circuit 30 of the slave station 3 via the control transmission line 5. The serial/parallel conversion circuit 30 uses a control word address (see FIG. 3).
When receiving a word address (word address of C1 ), a control signal is output to the decoding circuit 32. In the case of a received word address (word address C2 in FIG. 3), the received word address signal 31 is sent to the transmission signal storage circuit 2.
Output to 8.
３３は制御出力回路である。 33 is a control output circuit.
本発明によれば計測信号の伝送時間を大巾に短
縮できる。さらに計測信号１ビツトの重みの違い
による計測信号の更新値を変え、不必要な更新デ
ータの子局からの送信をせず必要な更新データを
早く伝送することが出来る。
According to the present invention, the transmission time of measurement signals can be significantly shortened. Furthermore, by changing the update value of the measurement signal based on the difference in the weight of one bit of the measurement signal, it is possible to quickly transmit necessary update data without transmitting unnecessary update data from the slave station.
第１図は遠方監視制御装置の構成図、第２図は
従来方式の伝送フオーマツト図、第３図は本発明
による伝送フオーマツト図、第４図、第５図は本
発明によるデータ伝送手順および構成図を示す図
である。
１……監視制御盤、２……親局、３……子局、
４……制御対象機器、５……制御伝送回線、６…
…表示伝送回線、７……計算機、８……送受信処
理回路、９……計算機結合回路、１０……データ
バス、１１……制御表示処理回路、１２……送受
信処理回路、１３……データバス、１４……制御
表示計測処理回路、１５……制御信号、１６……
表示信号、１７……計測信号、１８……変化検出
回路、１９……走査回路、２０……Ａ／Ｄ変換
器、２１……計測データ、２２……記憶回路、２
３……記憶データ、２４……変化検出信号、２５
……走査カウンタ、２６……走査アドレス信号、
２７……ワードアドレス信号、２８……送信信号
記憶回路、２９……並列／直列変換回路、３０…
…直列／並列変換回路、３１……受信済ワードア
ドレス信号、３２……復号化回路、３３……制御
出力回路、３４……直列／並列変換回路、３５…
…ワードアドレス検出回路、３６……受信デー
タ、３７……ワードアドレス検出信号、３８……
送信カウンタ、３９……送信ワードアドレス信
号、４０……受信ワードアドレス信号、４１……
受信ワードアドレス記憶回路、４２……受信済ワ
ードアドレス信号、４３……走査回路、４４並
列／直列変換回路、４５……分配回路、４６……
記憶回路、４７……表示器、４８……スイツチ接
点、４９……符号化回路。
Fig. 1 is a configuration diagram of a remote monitoring and control device, Fig. 2 is a transmission format diagram of a conventional method, Fig. 3 is a transmission format diagram according to the present invention, and Figs. 4 and 5 are a data transmission procedure and configuration according to the present invention. FIG. 1... Monitoring control panel, 2... Master station, 3... Slave station,
4... Controlled equipment, 5... Control transmission line, 6...
... Display transmission line, 7 ... Computer, 8 ... Transmission and reception processing circuit, 9 ... Computer coupling circuit, 10 ... Data bus, 11 ... Control display processing circuit, 12 ... Transmission and reception processing circuit, 13 ... Data bus , 14... Control display measurement processing circuit, 15... Control signal, 16...
Display signal, 17...Measurement signal, 18...Change detection circuit, 19...Scanning circuit, 20...A/D converter, 21...Measurement data, 22...Storage circuit, 2
3... Memory data, 24... Change detection signal, 25
...scanning counter, 26...scanning address signal,
27... Word address signal, 28... Transmission signal storage circuit, 29... Parallel/serial conversion circuit, 30...
...Serial/parallel conversion circuit, 31...Received word address signal, 32...Decoding circuit, 33...Control output circuit, 34...Serial/parallel conversion circuit, 35...
...Word address detection circuit, 36... Received data, 37... Word address detection signal, 38...
Transmission counter, 39... Transmission word address signal, 40... Reception word address signal, 41...
Received word address storage circuit, 42... Received word address signal, 43... Scanning circuit, 44 Parallel/serial conversion circuit, 45... Distribution circuit, 46...
Memory circuit, 47...Display device, 48...Switch contact, 49...Encoding circuit.
Claims (1)
して接続され、前記被制御所装置から計測信号を
前記制御所装置に伝送する遠方監視制御装置にお
いて、 前記被制御所装置で計測値の一定量以上の変化
検出を行ない、変化を検出した前記計測値を前記
制御所装置へ繰返して送信し、前記制御所装置で
前記計測値を受信後、前記被制御所装置へ応答信
号を返信し前記被制御所装置では応答信号を受信
後、前記計測値の繰返し送信を停止することを特
徴とする計測情報伝送方式。[Scope of Claims] 1. A remote monitoring and control device in which a control center device and a controlled center device are connected via a transmission line, and a measurement signal is transmitted from the controlled center device to the control center device, comprising: A control center device detects a change of a certain amount or more in a measured value, repeatedly transmits the measured value in which a change has been detected to the control center device, and after receiving the measured value in the control center device, transmits the measured value to the control center device. 1. A measurement information transmission method, wherein a response signal is returned to the controlled station device, and after receiving the response signal, the controlled station device stops repeatedly transmitting the measurement value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59102590A JPS60247347A (en) | 1984-05-23 | 1984-05-23 | Transmission system of measurement information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59102590A JPS60247347A (en) | 1984-05-23 | 1984-05-23 | Transmission system of measurement information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60247347A JPS60247347A (en) | 1985-12-07 |
| JPH0332954B2 true JPH0332954B2 (en) | 1991-05-15 |
Family
ID=14331443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59102590A Granted JPS60247347A (en) | 1984-05-23 | 1984-05-23 | Transmission system of measurement information |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60247347A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905232A (en) * | 1987-08-13 | 1990-02-27 | Digital Equipment Corporation | Peripheral repeater box |
| US5123091A (en) * | 1987-08-13 | 1992-06-16 | Digital Equipment Corporation | Data processing system and method for packetizing data from peripherals |
| JPS6477251A (en) * | 1987-09-18 | 1989-03-23 | Hitachi Seiko Kk | Differential signal transmission system |
| EP1655974A1 (en) * | 2004-11-08 | 2006-05-10 | Siemens Aktiengesellschaft | Method and apparatuses for information alignment between a manager and an agent in a management network |
-
1984
- 1984-05-23 JP JP59102590A patent/JPS60247347A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60247347A (en) | 1985-12-07 |
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