JPS639416B2 - - Google Patents
Info
- Publication number
- JPS639416B2 JPS639416B2 JP55052451A JP5245180A JPS639416B2 JP S639416 B2 JPS639416 B2 JP S639416B2 JP 55052451 A JP55052451 A JP 55052451A JP 5245180 A JP5245180 A JP 5245180A JP S639416 B2 JPS639416 B2 JP S639416B2
- Authority
- JP
- Japan
- Prior art keywords
- data
- line
- current
- contact
- relay
- 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
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/44—Arrangements for feeding power to a repeater along the transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Small-Scale Networks (AREA)
- Communication Control (AREA)
- Selective Calling Equipment (AREA)
Description
【発明の詳細な説明】
本発明は遠方監視システムの通信方式、特に停
電時の通信方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication method for a remote monitoring system, and particularly to a communication method during a power outage.
従来センタ装置1台に対し、端末装置n台(複
数)を接続する遠方監視システムの通信方式は第
1図に示す通りセンタ装置Cと端末装置A間で、
第1、第2、第3線L1,L2,Eを使用してデー
タ伝送を行ない、平常時でも停電時でも第1線
L1−第3線E、第2線L2−第3線E間に通信電
流を図の矢印の方向即ち第3線Eに於ける電流が
互に反対方向となるように流していた。従つて端
末装置の監視収容数が増大することにより、セン
タ装置C側の通信電流供給用電源装置の電流容
量、装置の外形寸法および重量、停電時バツクア
ツプ用のバツテリの容量等が増大していた。この
為電源装置の外形寸法および重量を一定にする
と、センタ装置における端末装置の監視収容数を
減少させるか、停電時におけるデータ伝送可能時
間を短縮させなければならなかつた。 Conventionally, the communication method of a remote monitoring system that connects n terminal devices (multiple) to one center device is as shown in Fig. 1, between the center device C and the terminal device A.
Data is transmitted using the 1st, 2nd, and 3rd wires L 1 , L 2 , and E, and the 1st wire
A communication current was passed between L 1 and the third line E, and between the second line L 2 and the third line E, so that the currents in the third line E were in opposite directions. Therefore, as the number of terminal devices that can be monitored increases, the current capacity of the communication current supply power supply device on the center device C side, the external dimensions and weight of the device, the battery capacity for backup during power outages, etc. have increased. . For this reason, if the external dimensions and weight of the power supply device are kept constant, it is necessary to reduce the number of terminal devices that can be monitored in the center device or to shorten the time during which data can be transmitted during a power outage.
本発明は従来のもののこのような欠点を除去し
停電時においてデータ伝送時以外は、通信電流の
供給を停止して、センタ装置−端末装置間のデー
タ伝送可能時間を延長させることを可能としたも
のである。 The present invention eliminates these drawbacks of the conventional devices, and makes it possible to extend the time during which data can be transmitted between the center device and the terminal device by stopping the supply of communication current except when transmitting data during a power outage. It is something.
本発明によると、センタ装置と端末装置間で第
1、第2、第3線を使用してデータ伝送を行な
い、平常時には第1線〜第3線間、第2線〜第3
線間に通信電流を第3線に於ける電流が互に反対
方向となるよう常時流し、またデータ伝送時には
第1線〜第3線、第2線〜第3線間の通信電流を
複流にしてデータの送受信を行ない、停電時には
データの送受信時のみ第1線〜第3線間、第2線
〜第3線間に通信電流を供給し、データの送受信
終了後通信電流の供給を停止することを特徴とす
る遠方監視システムの通信方式が得られる。 According to the present invention, data is transmitted between the center device and the terminal devices using the first, second, and third lines, and during normal times, data is transmitted between the first line and the third line, and between the second line and the third line.
A communication current is always passed between the lines so that the current in the third line is in the opposite direction, and during data transmission, the communication current between the first line and the third line and between the second line and the third line is made into a double current. During power outage, communication current is supplied between the first and third lines and between the second and third lines only when data is being sent and received, and the supply of communication current is stopped after data transmission and reception is completed. A communication method for a remote monitoring system is obtained.
次に本発明の実施例について、図面を参照して
説明する。第2図は本発明の一実施例のブロツク
図で、センタ装置Cと端末装置Aとを第1線L1、
第2線L2、第3線Eの3線で接続し、データの
送受信を行なうシステムを示している。センタ装
置Cは、第1線L1−第3線E間に受信リレーR1
とデータ検出用ダイオードD1とが接続され、第
2線L2−第3線E間には、データ送出用供給電
源V1およびV2が接続されている。V1およびV2
は、複流データを送るための正および負の互に逆
極性の直流電源であり、商用交流電源が供給され
ている時は、それを整流した直流電源で、商用交
流電源が断になると蓄電池(図示せず)からの直
流電源に切替るものである。 Next, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram of an embodiment of the present invention, in which a center device C and a terminal device A are connected to a first line L 1 ,
This shows a system in which three wires, a second line L 2 and a third line E, are used to transmit and receive data. The center device C has a receiving relay R 1 between the first line L 1 and the third line E.
and a data detection diode D1 are connected, and between the second line L2 and the third line E, power supplies V1 and V2 for data transmission are connected. V1 and V2
is a direct current power supply with opposite polarity, positive and negative, for sending double current data.When commercial AC power is supplied, it is a rectified DC power supply, and when the commercial AC power is cut off, it is used as a storage battery ( (not shown).
さらに、第2線L2には直列に電源V1,V2を切
換えることにより複流データを送るデータ送出リ
レーT1の接点t1と停電時通信電流を停止させる電
源供給停止リレーP1の接点p1とが接続されてい
る。センタ装置Cの内部の構成は、データ受信部
1、データ送信部2、データ識別変換部3、表示
部4、データ入力部5および停電検出部6よりな
つており、データ受信部1は受信リレーR1の接
点r1のオン、オフをデータ入力とし、データ送信
部2はデータ送出リレーT1を駆動し、接点t1を切
換える。データ認識変換部3はデータ受信部1、
データ入力部5および停電検出部6からのデータ
を認識し、各種制御を行う。 Furthermore, the second line L 2 has a contact t 1 of a data transmission relay T 1 that sends double-current data by switching the power supplies V 1 and V 2 in series, and a contact of a power supply stop relay P 1 that stops the communication current in the event of a power outage. p 1 is connected. The internal configuration of the center device C consists of a data reception section 1, a data transmission section 2, a data identification conversion section 3, a display section 4, a data input section 5, and a power outage detection section 6. The on/off of contact r 1 of R 1 is used as data input, and data transmitter 2 drives data sending relay T 1 to switch contact t 1 . The data recognition converter 3 includes the data receiver 1,
It recognizes data from the data input section 5 and power outage detection section 6 and performs various controls.
端末装置Aの構成もセンタ装置Cと同様に、デ
ータ受信部1′と、データ送信部2′と、データ識
別変換部3′と、データ入力部5′と、停電検出部
6′とを有する。データ受信部1′は第1線L1と
第3線Eの間に接続された受信リレーR1′の接点
r1′の開閉によりデータを受信し、データ送信部
2′はデータ送出リレーT1′の接点t1′の開閉によ
りデータの送信を行う。センタ装置へのデータの
送信はセンタ装置から端末装置へのデータ送信と
同様に、データ送出リレー接点t1′をデータ送出
用供給電源V1′,V2′に切換接続することによつて
行われる。P1′は電源供給停止リレーで、データ
識別変換部3′によつて駆動され、その接点p1′を
オン、オフする。 The configuration of the terminal device A is similar to that of the center device C, and includes a data receiving section 1', a data transmitting section 2', a data identification converting section 3', a data input section 5', and a power outage detecting section 6'. . The data receiving section 1' is a contact point of a receiving relay R1 ' connected between the first line L1 and the third line E.
Data is received by opening and closing r 1 ', and data transmitting section 2' transmits data by opening and closing contact t 1 ' of data sending relay T 1 '. Data transmission to the center device is performed by switching and connecting the data transmission relay contact t 1 ′ to the data transmission power supply V 1 ′, V 2 ′ in the same way as data transmission from the center device to the terminal device. be exposed. P 1 ' is a power supply stop relay, which is driven by the data identification converter 3' to turn on and off the contact p 1 '.
センタ装置C側で平常時は、電源供給停止リレ
ーP1が駆動され、その接点p1がオン(図の点線の
状態)となつており、データ送出リレーT1の接
点t1は、データ送出用供給電源V1側に接続してい
る。また、端末装置Aも平常時には、電源供給停
止用リレーP1′の接点p1′がオンとなり、データ送
出リレーT1′の接点t1′がデータ送出用供給電源
V1′側に接続する。したがつて平常時には各接点
が図の点線に示す状態にあり、第1線L1と第3
線E、第2線L2と第3線E間でそれぞれ閉ルー
プが形成され、第3線には互いに逆方向の電流が
流れる。 Under normal conditions on the center device C side, the power supply stop relay P 1 is driven, its contact p 1 is on (the state indicated by the dotted line in the figure), and the contact t 1 of the data transmission relay T 1 is in the data transmission state. Connected to the power supply V1 side. In addition, in normal times, terminal device A also has contact p 1 ′ of power supply stop relay P 1 ′ turned on, and contact t 1 ′ of data sending relay T 1 ′ turns on power supply power supply for data sending.
Connect to V 1 ′ side. Therefore, under normal conditions, each contact point is in the state shown by the dotted line in the figure, and the first line L1 and the third
A closed loop is formed between the line E, the second line L2 , and the third line E, and currents in opposite directions flow through the third line.
データ伝送時、センタ装置Cは接点p1をオンに
したままで、データ送出リレーT1の接点t1のオ
ン、オフにより正負電源からの複流データを、第
2線L2と第3線Eを介して送る。また、端末装
置Aも同様に接点p1′をオンにしたままで、接点
t1′のオン、オフにより複流データを第1線L1と
第3線Eを介して送る。 During data transmission, center device C keeps contact p 1 on and sends double current data from the positive and negative power supplies to second wire L 2 and third wire E by turning on and off contact t 1 of data sending relay T 1. Send via. Similarly, terminal device A also closes contact p 1 ′ with contact p 1 ′ turned on.
Double current data is sent via the first line L1 and the third line E by turning on and off t1' .
センタ装置Cが端末側より第1線L1と第3線
Eを介してデータを受信すると、受信リレー接点
r1が受信データに従つてオン(接地)あるいはオ
フ(オープン)となつて受信動作する為、受信部
1ではデータを検出し、受信データ識別変換部3
を介して表示部4で表示する。この時、受信デー
タに対して応答の必要がある時には、受信データ
識別変換部3はデータ送信部2を介して、データ
送出リレーT1を動作させ、端末側に対して応答
データを送出する。 When the center device C receives data from the terminal side via the first line L1 and the third line E, the reception relay contact
Since r 1 turns on (grounded) or off (open) according to the received data and performs the reception operation, the receiving section 1 detects the data and converts it to the received data identification conversion section 3.
It is displayed on the display section 4 via the. At this time, when it is necessary to respond to the received data, the received data identification converting section 3 operates the data sending relay T1 via the data transmitting section 2 , and sends the response data to the terminal side.
次に停電時の動作について説明する。 Next, the operation during a power outage will be explained.
センタ装置C側で停電になつた場合、停電検出
部6で停電を検出し、その検出によつてデータ識
別変換部3がデータ送出部2を制御し、これによ
つてリレーT1が動作し、端末装置A側に停電検
出信号を送出させる。 When a power outage occurs on the side of the center device C, the power outage detection section 6 detects the power outage, and based on the detection, the data identification conversion section 3 controls the data sending section 2, thereby operating the relay T1 . , causes the terminal device A side to send out a power outage detection signal.
端末A側で停電検出信号を確実に受信したこと
を、センタ装置のデータ認識変換部3がデータ受
信部1からのデータによつて確認すると、センタ
装置C側の電源供給停止リレーP1をオフとし、
その接点p1を断として第2線L2を断とさせ通信電
流が流れないようにする。一方、端末側でも同様
に電源供給停止リレーP1′を複旧させ第1線L1を
断とし、通信電流が流れないようにする。停電
中、センタ装置の電源はバツクアツプ用の蓄電池
に切換わつている。 When the data recognition converter 3 of the center device confirms that the power failure detection signal has been definitely received on the terminal A side using the data from the data receiver 1, it turns off the power supply stop relay P 1 on the center device C side. year,
The contact p1 is disconnected and the second line L2 is disconnected to prevent communication current from flowing. On the other hand, on the terminal side, similarly, the power supply stop relay P 1 ' is duplicated to disconnect the first line L 1 so that no communication current flows. During a power outage, the power source for the center equipment is switched to the backup storage battery.
停電中にデータ送出の必要が生じた場合、デー
タ認識変換部3はバツクアツプ用の蓄電池を電源
として動作し、電源供給停止用リレーP1を動作
させ接点p1をオンとし、また、データ送信部2を
制御してデータ送信用リレーT1の接点t1よりデー
タ送出要求信号を送出させる。相手側すなわち端
末装置Aでは、データ送出要求信号をデータ受信
用リレーR′1を介してデータ受信部1′が受信し、
データ認識変換部3′が電源供給停止リレーP′1を
動作させ接点p1をオンにする。以上のように接点
p1とp1′が順次オンになると、センタおよび端末
側間でデータの送受信が行われ、データの送受信
が終了するとデータ認識変換部3,3′の制御に
より再び電源供給停止リレーP1,P1′をオフさせ、
第1線L1、第2線L2の通信電流を断状態にする。 If it is necessary to send data during a power outage, the data recognition converter 3 operates using the backup storage battery as a power source, operates the power supply stop relay P1 , turns on contact P1 , and also operates the data transmitter 2 to send out a data sending request signal from the contact t1 of the data sending relay T1 . On the other party's side, that is, in the terminal device A, the data receiving unit 1 ' receives the data transmission request signal via the data receiving relay R'1,
The data recognition converter 3' operates the power supply stop relay P'1 to turn on the contact p1 . Contact points as above
When p 1 and p 1 ' are turned on sequentially, data is transmitted and received between the center and the terminal side, and when the data transmission and reception is completed, the power supply stop relay P 1 , Turn off P 1 ′,
The communication currents of the first line L 1 and the second line L 2 are turned off.
なお、第2図には、データ送出線L1に一方向
のダイオードD1,D1′およびリレーR1,R1′から
なる直列回路だけを設けた場合を示しているが、
この直列回路と並列に逆方向に接続したダイオー
ドおよびリレーの直列回路を付加し、これらリレ
ーの接点によつてデータ受信部1,1′に受信信
号を供給することにより、複流化されることは明
らかであろう。 Although FIG. 2 shows a case where only a series circuit consisting of unidirectional diodes D 1 and D 1 ' and relays R 1 and R 1 ' is provided in the data transmission line L 1 ,
By adding a series circuit of diodes and relays connected in the opposite direction in parallel to this series circuit, and supplying the received signal to the data receiving sections 1 and 1' through the contacts of these relays, double current can be prevented. It should be obvious.
以上は、センタ装置が停電の場合の動作である
が、端末装置側が停電の場合も同様に動作する。
すなわち、停電検出部6′で停電が検出されると、
センタ装置へ停電検出信号が送出され接点p1,
p1′がオフとなる。また、データ送出時にはデー
タ送出要求信号をセンタ側へ送出し、これによつ
て接点p1,p1′がオンになりデータの送受信が行
われ、データ送受信が終了すると接点p1,p1′は
再びオフとなる。 The above is the operation when there is a power outage on the center device, but the same operation occurs when there is a power outage on the terminal device side.
That is, when a power outage is detected by the power outage detection unit 6',
A power failure detection signal is sent to the center device, and contact p 1 ,
p 1 ′ is turned off. Also, when sending data, a data sending request signal is sent to the center side, which turns on contacts p 1 and p 1 ′ to perform data sending and receiving, and when data sending and receiving is completed, contacts p 1 and p 1 ′ is turned off again.
このようにすることにより、今までのように停
電時常時通信電流を流している時と同じ効果が得
られ、更に停電時には通信電流を常時供給する必
要がない為、蓄電池の容量も少なく、停電時のデ
ータ伝送可能時間を延長させることができる。 By doing this, it is possible to obtain the same effect as in the past when communication current is constantly flowing during a power outage.Furthermore, since there is no need to constantly supply communication current during a power outage, the capacity of the storage battery is small, and the power outage is interrupted. The available data transmission time can be extended.
本発明は上記に説明したように、停電時には通
信電流の供給を停止させることにより、バツテリ
の容量を小さくし、停電時のデータ伝送可能時間
を延長する効果がある。 As described above, the present invention has the effect of reducing the battery capacity by stopping the supply of communication current during a power outage, thereby extending the data transmission possible time during a power outage.
第1図は、従来の各装置間の回線電流の方向を
示す図、第2図は本発明の実施例のブロツク図を
示す。
L1……端末側からセンタ側に対してのデータ
送出線、L2……センタ側から端末側に対しての
データ送出線、E……L1,L2線に対しての共通
線、P1,P1′……電源供給停止リレー、T1,
T1′……データ送出用リレー、R1,R1′……デー
タ受信用リレー、D1……データ検出用ダイオー
ド、V1,V1′およびV2,V2′……データ送出用電
源、1,1′……データ受信部、2,2′……デー
タ送信部、3,3′……データ識別変換部、4…
…表示部、5,5′……データ入力部、6,6′…
…停電検出部。
FIG. 1 is a diagram showing the direction of line current between conventional devices, and FIG. 2 is a block diagram of an embodiment of the present invention. L1 ...Data transmission line from the terminal side to the center side, L2 ...Data transmission line from the center side to the terminal side, E...Common line for the L1 and L2 lines, P 1 , P 1 ′...Power supply stop relay, T 1 ,
T 1 ′... Relay for data transmission, R 1 , R 1 ′... Relay for data reception, D 1 ... Diode for data detection, V 1 , V 1 ' and V 2 , V 2 '... For data transmission Power supply, 1, 1'...data receiving section, 2, 2'...data transmitting section, 3, 3'...data identification conversion section, 4...
...Display section, 5, 5'... Data input section, 6, 6'...
...Power failure detection unit.
Claims (1)
第2、第3線を使用してデータ伝送を行う遠方監
視システムにおいて、平常時には第1線〜第3線
間と第2線〜第3線間で、それぞれ閉ループを形
成し通信電流を第3線に於ける電流が互に反対方
向となるように常時流し、またデータ伝送時には
第1線〜第3線、第2線〜第3線間の通信電流を
複流にしてデータの送受信を行ない、停電時には
データの送受信時のみ第1線〜第3線間、第2線
〜第3線間で、それぞれ閉レープを形成し通信電
流を供給し、データの送受信終了後、通信電流の
供給を停止することを特徴とする遠方監視システ
ムの通信方式。1 The first device connected between the center device and the terminal device,
In a remote monitoring system that transmits data using the second and third wires, during normal times, closed loops are formed between the first and third wires and between the second and third wires, and the communication current is transferred to the third wire. The currents in the lines are always flowing in opposite directions, and when transmitting data, the communication current between the first line and the third line and between the second line and the third line is made into a double current to transmit and receive data, In the event of a power outage, a closed loop is formed between the 1st and 3rd lines and between the 2nd and 3rd lines only when data is being transmitted/received, and communication current is supplied, and the communication current supply is stopped after data transmission/reception is completed. A communication method for a remote monitoring system that is characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5245180A JPS56149149A (en) | 1980-04-21 | 1980-04-21 | Communication system of remote monitor system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5245180A JPS56149149A (en) | 1980-04-21 | 1980-04-21 | Communication system of remote monitor system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56149149A JPS56149149A (en) | 1981-11-18 |
JPS639416B2 true JPS639416B2 (en) | 1988-02-29 |
Family
ID=12915082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5245180A Granted JPS56149149A (en) | 1980-04-21 | 1980-04-21 | Communication system of remote monitor system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56149149A (en) |
-
1980
- 1980-04-21 JP JP5245180A patent/JPS56149149A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS56149149A (en) | 1981-11-18 |
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