JPH0560289B2 - - Google Patents
Info
- Publication number
- JPH0560289B2 JPH0560289B2 JP57159112A JP15911282A JPH0560289B2 JP H0560289 B2 JPH0560289 B2 JP H0560289B2 JP 57159112 A JP57159112 A JP 57159112A JP 15911282 A JP15911282 A JP 15911282A JP H0560289 B2 JPH0560289 B2 JP H0560289B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- signal
- slave station
- polling
- polling 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 description 12
- 230000005856 abnormality Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
Description
【発明の詳細な説明】
発明の技術分野
本発明は、ポーリング方式に従つて子局から応
答信号を親局に向つて送信する様にした監視制御
方式の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an improvement in a supervisory control system in which a response signal is transmitted from a slave station to a master station according to a polling system.
従来技術及び問題点
従来から第１図に示す様に、親局１と複数の子
局２−Ａ〜２−ｎを同時送受話回線L1，L2で接
続し、親局１から下り回線L1を介してポーリン
グ信号を各子局共並列で受信し、自局が選択され
た場合、順次監視信号を上り回線L2を介して直
列に親局１に送信している。そして各子局では、
監視信号を送信するために、搬送波発振器と符号
器、変調器から成る送信器を有している。Prior Art and Problems Conventionally, as shown in FIG. Each slave station receives polling signals in parallel via L1 , and when its own station is selected, it sequentially transmits monitoring signals to the master station 1 in series via uplink L2. And at each subsidiary station,
In order to transmit the monitoring signal, it has a transmitter consisting of a carrier wave oscillator, an encoder, and a modulator.
この様に、従来の方式では必ず搬送波発振器を
備えなければならず、機器構成上複雑であつた。 As described above, in the conventional system, a carrier wave oscillator must be provided, and the equipment configuration is complicated.
発明の目的及び構成
本発明は、上記欠点を除去し、機器構成を簡素
化する監視制御方式を提供することを目的とする
ものである。OBJECT AND CONFIGURATION OF THE INVENTION An object of the present invention is to provide a supervisory control system that eliminates the above drawbacks and simplifies the equipment configuration.
上記目的は、本発明によれば、親局と子局を同
時送受話回線で接続し、該親局からのポーリング
信号を受けると該子局から該親局に向けて応答信
号を送出する監視制御方式において、親局では、
所定期間連続したポーリング信号を各子局に対し
順次送信し、該ポーリング信号を受信した子局で
は、所定の他子局へのポーリング信号を折り返す
か否かにより応答信号を作成して親局に送出し、
該親局では送信ポーリグ信号と該信号に対応する
応答信号との比較により、所定の子局からの応答
信号として認識することを特徴とする監視制御方
式によつて達成される。 According to the present invention, the above object is a monitoring system in which a master station and a slave station are connected by a simultaneous transmission/reception line, and when a polling signal is received from the master station, a response signal is sent from the slave station to the master station. In the control method, at the master station,
A continuous polling signal for a predetermined period of time is sequentially transmitted to each slave station, and the slave station that receives the polling signal generates a response signal and sends it to the master station depending on whether or not to return the polling signal to other predetermined slave stations. sending out,
This is achieved by a supervisory control method characterized in that the master station recognizes the response signal as a response signal from a predetermined slave station by comparing the transmitted polling signal and the response signal corresponding to the signal.
発明の実施例
以下本発明を実施例に基づいて説明する。第２
図は本発明に用いる親局のブロツク図、第３図は
同子局のブロツク図、第４図はタイムチヤートで
あり、１３は親局からのポーリング信号であり、
所定期間連続したポーリング信号を各子局に対し
順次送信するものである。１５は親局で受信され
る各子局からの応答信号を示すものである。尚、
応答信号として親局に送る監視情報としては、一
番簡単な異常有り、なしの２つの情報を次局のポ
ーリグ信号を使用するものを例にとつて説明す
る。EXAMPLES OF THE INVENTION The present invention will be described below based on examples. Second
The figure is a block diagram of the master station used in the present invention, FIG. 3 is a block diagram of the slave station, and FIG. 4 is a time chart. 13 is a polling signal from the master station.
A polling signal that continues for a predetermined period of time is sequentially transmitted to each slave station. Reference numeral 15 indicates a response signal from each slave station received by the master station. still,
As the monitoring information to be sent to the master station as a response signal, the simplest two types of information, that is, whether there is an abnormality or not, will be explained using the next station's polling signal as an example.
図中３はトリガ信号発生回路、４，６は符号回
路、５は変調器、７，９は復調器、８は比較回
路、１０は自局選択信号検出回路、１１はドライ
バ、１２はスイツチである。 In the figure, 3 is a trigger signal generation circuit, 4 and 6 are code circuits, 5 is a modulator, 7 and 9 are demodulators, 8 is a comparison circuit, 10 is a self-station selection signal detection circuit, 11 is a driver, and 12 is a switch. be.
以下動作を図面に参照して説明する。 The operation will be explained below with reference to the drawings.
まず親局においては、トリガ信号発生回路３か
らのトリガ信号により符号回路４より子局番号の
符号化を行ない、変調器５により変調して第４図
１３の如く、１３−Ａ，１３−Ｂ，１３−Ｃ，１
３−Ｄ…１３−ｎ，１３−A′と所定期間連続し
たポーリング信号を各子局に対し順次送信する。
ここで１３−A′は次のポーリングサイクルのＡ
局のポーリング信号である。そして子局では復調
器９でポーリング信号を復調し、自局選択信号検
出回路１０に入力する。 First, in the master station, the code circuit 4 encodes the slave station number using the trigger signal from the trigger signal generation circuit 3, and modulates the slave station number using the modulator 5. As shown in FIG. ,13-C,1
3-D... 13-n, 13-A' and consecutive polling signals for a predetermined period are sequentially transmitted to each slave station.
Here 13-A' is A of the next polling cycle.
This is the station's polling signal. In the slave station, the demodulator 9 demodulates the polling signal and inputs it to the local station selection signal detection circuit 10.
そして、各子局においてポーリング信号により
自局が選択されていなければ、スイツチ１２をオ
フとし、次ポーリング信号を親局に返送しないよ
う制御する。一方自局が選択されていれば、自局
選択検出回路からの信号をトリガとして、監視情
報をドライバ１１に入力し、異常なしであればド
ライバ１１によりスイツチ１２をオンにし、次局
を選択するためのポーリング信号を折り返し、異
常有りであれば次局のポーリング信号を折り返さ
ないよう制御する。つまり第４図１３，１４から
明らかなように、親局のポーリング信号１３−Ａ
により子局２−Ａが選択され、子局Ａに異常がな
い場合、子局２−Ａはポーリング信号１３−Ｂを
応答信号（異常なしを示す）をスイツチ１２より
折り返す。次に、子局Ｂが１３−Ｂにより選択さ
れた場合、子局２−Ｂはポーリング信号１３−Ｃ
を折り返さないことで異常有りの応答信号を親局
に送出することになる。つまり、次の子局を選択
するポーリング信号を使用して応答信号を送出す
るわけである。 If each slave station does not select its own station by the polling signal, the switch 12 is turned off and the next polling signal is controlled not to be sent back to the master station. On the other hand, if the own station is selected, the signal from the own station selection detection circuit is used as a trigger to input the monitoring information to the driver 11, and if there is no abnormality, the driver 11 turns on the switch 12 and selects the next station. The polling signal for the next station is returned, and if there is an abnormality, the polling signal for the next station is controlled not to be returned. In other words, as is clear from FIG. 4 13 and 14, the polling signal 13-A of the master station
When the slave station 2-A is selected and there is no abnormality in the slave station A, the slave station 2-A returns a polling signal 13-B and a response signal (indicating that there is no abnormality) from the switch 12. Next, when slave station B is selected by 13-B, slave station 2-B receives polling signal 13-C.
By not returning the message, a response signal indicating that there is an abnormality will be sent to the master station. In other words, a response signal is sent using a polling signal for selecting the next slave station.
第４図１５は、親局に入力する監視信号で、各
子局から返送された信号は上り回線L2により直
列に伝送送され、復調回路７に入力される。そし
てここで復調され、比較回路８に入力される。更
に比較回路８へは、変調器５から送信されている
ポーリング局番の１局前の局番の符号化された信
号が符号回路６から入力される。この比較回路８
への制御は符号回路４，６へのトリガ回路からの
トリガ信号又は符号回路６の設定により、１ポー
リング分ずらすことは容易に可能なものである。
親局から送信されたポーリング信号は、ポーリン
グ信号の１局分の時間内に子局から戻されること
で、このポーリング分のずれを制御する。 FIG. 4 15 shows a monitoring signal input to the master station, and the signals returned from each slave station are serially transmitted through the uplink L 2 and input to the demodulation circuit 7. Then, it is demodulated here and input to the comparator circuit 8. Furthermore, an encoded signal of the station number one station before the polling station number transmitted from the modulator 5 is inputted to the comparison circuit 8 from the encoding circuit 6 . This comparison circuit 8
The control can be easily shifted by one polling by a trigger signal from a trigger circuit to the code circuits 4 and 6 or by setting of the code circuit 6.
The polling signal transmitted from the master station is returned from the slave station within the time of one polling signal, thereby controlling the polling deviation.
第１図を例に上げて説明すると、子局２−Ｃ向
けのポーリング信号を親局が送信しているときに
は、子局２−Ａが折り返した子局２−Ｂ向けのポ
ーリング信号を親局が受信していることになる。
以上の例は上記にも述べたとおり、親局−子局間
伝送時間が１子局分のポーリング信号時間を例に
しているものである。また以上を一般的に言え
ば、ポーリング信号を送出して、子局で折り返さ
れた同一のポーリング信号が親局に返送されてく
る時間だけ、符号回路６の出力を符号回路４に比
べずれるよう制御すればよいものである。 To explain using FIG. 1 as an example, when the master station is transmitting a polling signal for slave station 2-C, the slave station 2-A sends back the polling signal for slave station 2-B to the master station. is being received.
As mentioned above, in the above example, the transmission time between the master station and the slave station is the polling signal time for one slave station. Generally speaking, when a polling signal is sent out, the output of the code circuit 6 is shifted from that of the code circuit 4 by the time it takes for the same polling signal returned by the slave station to be sent back to the master station. It is something that can be controlled.
そして比較回路８では、一致すれば該当子局は
異常なしとして監視情報を出力する。不一致であ
れば異常有りとして監視情報を出力する。第４図
１４及び１５の例では子局Ｂにおいてポーリング
信号の折り返しがないことから、子局Ｂにおいて
異常が発生していることを示している。 Then, in the comparison circuit 8, if there is a match, the slave station in question outputs monitoring information indicating that there is no abnormality. If they do not match, it is determined that there is an abnormality and monitoring information is output. In the examples shown in FIGS. 14 and 15, the polling signal is not returned at slave station B, which indicates that an abnormality has occurred at slave station B.
上記技術を簡単にまとめると、本願発明は、従
来方式のようにポーリング信号の後に応答時間を
とるのではなく、所定の子局を選択するポーリン
グ信号自体を所定期間送信し、該ポーリング信号
をそのまま返送するか否かによつて応答信号を親
局に送出することを特徴とするものである。従つ
て、子局において監視情報を自ら作りだし下り回
線を使用して、自己の持つ搬送波を使用して送出
する必要がなくなり、搬送波発振器を持つ必要が
ない。 To briefly summarize the above technology, the present invention does not take a response time after a polling signal as in the conventional system, but instead transmits the polling signal itself for a predetermined period of time to select a predetermined slave station, and transmits the polling signal as it is. This is characterized in that a response signal is sent to the master station depending on whether it is to be sent back or not. Therefore, there is no need for the slave station to generate monitoring information by itself and transmit it using its own carrier wave using the downlink, and there is no need to have a carrier wave oscillator.
以上、監視情報として以上有り、なしの２つの
情報の応答信号を例にとつて説明してきたが、よ
り詳細な情報を送出することも可能である。 The above has been described using as an example a response signal of two pieces of information, one with and one without, as monitoring information, but it is also possible to send out more detailed information.
まず、監視情報をコード化し、ポーリング信号
返送のためのスイツチ１２の制御を、自局が選択
された後の次局ポーリング信号を受信している間
に、前記コード化信号に応じて複数回オンオフ制
御することにより、１、０の複数からなるパター
ンを親局に送信することもできる。 First, the monitoring information is encoded, and the control of the switch 12 for returning the polling signal is turned on and off multiple times according to the coded signal while receiving the next station polling signal after the local station is selected. By controlling it, it is also possible to transmit a pattern consisting of a plurality of 1's and 0's to the master station.
尚本発明を監視を例にとつて説明したが、親局
からの制御信号に対して、応答を返送する場合に
も適用が可能である。 Although the present invention has been described using monitoring as an example, it can also be applied to the case where a response is sent back in response to a control signal from a master station.
発明の効果
以上述べた様に本発明によれば子局に搬送波用
発振器を用いることなく、親局に対して、応答を
行うことが可能となる。Effects of the Invention As described above, according to the present invention, it becomes possible to respond to the master station without using a carrier wave oscillator in the slave station.
第１図は、本発明を適用するシステム図、第２
図は、本発明に用いる親局のブロツク図、第３図
は同子局のブロツク図、第４図は本発明のタイム
チヤートである。
図中３はトリガ信号発生回路、４，６は符号回
路、５は変調器、７，９は復調器、８は比較回
路、１０は自局選択信号検出回路、１１はドライ
バ、１２はスイツチである。
Figure 1 is a system diagram to which the present invention is applied;
3 is a block diagram of the master station used in the present invention, FIG. 3 is a block diagram of the slave station, and FIG. 4 is a time chart of the present invention. In the figure, 3 is a trigger signal generation circuit, 4 and 6 are code circuits, 5 is a modulator, 7 and 9 are demodulators, 8 is a comparison circuit, 10 is a self-station selection signal detection circuit, 11 is a driver, and 12 is a switch. be.
Claims (1)
局からのポーリング信号を受けると該子局から該
親局に向けて応答信号を送出する監視制御方式に
おいて、 親局では、所定期間連続したポーリング信号を
各子局に対し順次送信し、該ポーリング信号を受
信した子局では、所定の他子局へのポーリング信
号を折り返すか否かにより応答信号を作成して親
局に送出し、該親局では送信ポーリグ信号と該信
号に対応する応答信号との比較により、所定の子
局からの応答信号として認識することを特徴とす
る監視制御方式。[Claims] 1. In a supervisory control system in which a master station and a slave station are connected by a simultaneous transmission/reception line, and upon receiving a polling signal from the master station, the slave station sends a response signal to the master station. , The master station sequentially transmits a continuous polling signal for a predetermined period to each slave station, and the slave station that receives the polling signal generates a response signal depending on whether or not to return the polling signal to other predetermined slave stations. A supervisory control system characterized in that the polling signal is transmitted to a master station, and the master station recognizes the polling signal as a response signal from a predetermined slave station by comparing the transmitted polling signal with a response signal corresponding to the signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57159112A JPS5951639A (en) | 1982-09-13 | 1982-09-13 | Monitor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57159112A JPS5951639A (en) | 1982-09-13 | 1982-09-13 | Monitor control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5951639A JPS5951639A (en) | 1984-03-26 |
| JPH0560289B2 true JPH0560289B2 (en) | 1993-09-02 |
Family
ID=15686501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57159112A Granted JPS5951639A (en) | 1982-09-13 | 1982-09-13 | Monitor control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5951639A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5374308A (en) * | 1976-12-15 | 1978-07-01 | Okura Denki Co Ltd | Transmission signal output level control system |
| JPS53119602A (en) * | 1977-03-28 | 1978-10-19 | Ricoh Co Ltd | Data transmission system |
| JPS5478003A (en) * | 1977-12-05 | 1979-06-21 | Hitachi Ltd | Code information transmission system |
-
1982
- 1982-09-13 JP JP57159112A patent/JPS5951639A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5374308A (en) * | 1976-12-15 | 1978-07-01 | Okura Denki Co Ltd | Transmission signal output level control system |
| JPS53119602A (en) * | 1977-03-28 | 1978-10-19 | Ricoh Co Ltd | Data transmission system |
| JPS5478003A (en) * | 1977-12-05 | 1979-06-21 | Hitachi Ltd | Code information transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5951639A (en) | 1984-03-26 |
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