JPH0230618B2 - - Google Patents
Info
- Publication number
- JPH0230618B2 JPH0230618B2 JP57113296A JP11329682A JPH0230618B2 JP H0230618 B2 JPH0230618 B2 JP H0230618B2 JP 57113296 A JP57113296 A JP 57113296A JP 11329682 A JP11329682 A JP 11329682A JP H0230618 B2 JPH0230618 B2 JP H0230618B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- master station
- slave stations
- station
- transmission line
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
Landscapes
- Small-Scale Networks (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Description
【発明の詳細な説明】
(1) 発明の分野
この発明は、ポーリングによつて主局と従局と
の間でデータの通信を行うようなデータ伝送装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (1) Field of the Invention The present invention relates to a data transmission device that communicates data between a master station and a slave station by polling.
(2) 従来技術
従局として、例えば温度等のプロセス量を収集
し、主局からのポーリング信号に応じて主局へ伝
送する入力処理装置、主局からのポーリング信号
によるデータを受信し出力する出力処理装置等が
ある。そして、これら従局は主局からの伝送線に
接続されており、その延長距離は、通信の関係
上、所定の長さまでとされている。(2) Prior art As a slave station, there is an input processing device that collects process variables such as temperature and transmits the data to the master station in response to a polling signal from the master station, and an output that receives and outputs data based on the polling signal from the master station. There are processing equipment, etc. These slave stations are connected to a transmission line from the master station, and the extension distance thereof is limited to a predetermined length for communication reasons.
このため、多数の従局を接続することは困難で
あり、又、異なつた高速、低速のポーリング周期
を必要とする機器を従局とすることは困難である
等の問題点があつた。 Therefore, it is difficult to connect a large number of slave stations, and it is also difficult to use devices that require different high-speed and low-speed polling cycles as slave stations.
(3) 発明の目的
この発明の目的は、以上の点に鑑み、多数の
種々の従局を接続することを可能としたデータ伝
送装置を提供することである。(3) Purpose of the Invention In view of the above points, the purpose of the present invention is to provide a data transmission device that can connect a large number of various slave stations.
(4) 発明の実施例
第１図は、この発明の一実施例を示す構成説明
図である。(4) Embodiment of the Invention FIG. 1 is a configuration explanatory diagram showing an embodiment of the invention.
図において、１は伝送を管理する主局、l1，l2，
…lkは複数本の伝送線、１１，１２，…，１ｎ，
２１，２２，…，２ｍ，k1，k2，…，kpは各伝
送線l1，l2，…lkに接続される入出力処理を行う
従局である。 In the figure, 1 is the main station that manages transmission, l 1 , l 2 ,
...lk are multiple transmission lines, 11, 12,..., 1n,
21, 22, . . . , 2m, k 1 , k 2 , . . . , kp are slave stations connected to the respective transmission lines l 1 , l 2 , .
この場合、主局１からのポーリングにより、各
伝送線l1，l2，…，lkの従局１１，１２…，kpは
主局とデータの授受を行い、例えば伝送線l1の従
局１１のデータは、主局１を介し伝送線l2の従局
２ｍに出力が可能であり、又、伝送線l2の従局２
１のデータは主局１を介し、伝送線lkの従局kp
へ出力可能とされている。 In this case, by polling from the master station 1, the slave stations 11, 12..., kp of each transmission line l1 , l2 ,...,lk exchange data with the master station.For example, the slave station 11 of the transmission line l1 Data can be output to the slave station 2m of the transmission line l2 via the master station 1, and the slave station 2m of the transmission line l2
1 data is passed through master station 1 to slave station kp on transmission line lk.
It is possible to output to.
なお伝送距離は、各伝送線l1，l2，…，lkと主
局との距離が各々所定の最長距離l0以内であれば
よいので、各伝送線の距離は任意の２本の距離が
2l0以内であればよいので、制御される伝送線の
距離は２倍まで拡張できる。 As for the transmission distance, it is sufficient that the distance between each transmission line l 1 , l 2 , ..., lk and the main station is within the predetermined maximum distance l 0 , so the distance between each transmission line is the distance between any two but
Since it only needs to be within 2l 0 , the distance of the controlled transmission line can be doubled.
又、ポーリング周期を、すべての伝送線につい
て同一とすれば、システム全体のスピードが確定
し、出力データは常に一定のものとなる。 Furthermore, if the polling period is the same for all transmission lines, the speed of the entire system is determined and the output data is always constant.
又、ポーリング周期を、伝送線毎に互いに異な
つたものとすれば、高速処理が必要なもの、そう
でないもの等、種々のスピードをとることがで
き、部分的な高速化が可能となる。 Furthermore, if the polling period is made different for each transmission line, various speeds can be used depending on whether high-speed processing is required or not, and it is possible to partially increase the speed.
更に、ポーリング周期を、伝送線毎に互いに同
一のもの、異なつたものを混在させるようにすれ
ば、用途別の伝送を主局で管理でき、部分的に必
要となる異種伝送線の従局間の伝送もできる。 Furthermore, if the polling period is made to be the same or different for each transmission line, the master station can manage transmission for each purpose, and the polling period between slave stations of different types of transmission lines, which is partially necessary, can be controlled by the master station. Transmission is also possible.
(5) 発明の要約
以上述べたように、この発明は、主局と従局間
を伝送線により接続しポーリング信号によつて通
信を行う装置において、複数の伝送線に接続され
た従局間の伝送の管理も主局で行うようにしたデ
ータ伝送装置である。(5) Summary of the Invention As described above, the present invention provides a device that connects a master station and slave stations via transmission lines and communicates using polling signals, in which transmission between slave stations connected to a plurality of transmission lines is performed. This is a data transmission device in which the main station also manages the information.
(6) 発明の効果
主局を介して異なつた伝送線の従局間の伝送管
理を行つているので、伝送線の総延長距離を２倍
とすることができ、従局の接続台数を大幅に増大
させることができる。又、異なつた伝送線の従局
間のデータの授受を可能としているので、システ
ム全体の拡張性、用途別適合性等を向上させるこ
とができる。又、ポーリング周期を種々のものと
することにより、用途に応じたデータの更新の高
速化等も可能となる。(6) Effects of the invention Since transmission management between slave stations on different transmission lines is performed via the master station, the total length of the transmission line can be doubled, and the number of connected slave stations can be greatly increased. can be done. Furthermore, since it is possible to send and receive data between slave stations on different transmission lines, it is possible to improve the expandability of the entire system and its suitability for each application. Furthermore, by varying the polling period, it is possible to speed up data updates depending on the application.
第１図は、この発明の一実施例を示す構成説明
図である。
１…主局、１１〜kp…従局、l1〜lk…伝送線。
FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention. 1...Main station, 11~kp...Slave station, l1 ~lk...Transmission line.
Claims (1)
れた従局との間の通信を主局からのポーリング信
号によつて行う装置において、前記主局は、複数
の互いに異るポーリング周期とされた伝送線をも
ち、この異なる伝送線に接続された従局間のデー
タ伝送を管理することを特徴とするデータ伝送装
置。1. In a device that uses polling signals from the master station to communicate between a master station that manages transmission and slave stations connected to a common transmission line, the master station uses a plurality of polling cycles that are different from each other. What is claimed is: 1. A data transmission device having two transmission lines and managing data transmission between slave stations connected to different transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11329682A JPS594358A (en) | 1982-06-30 | 1982-06-30 | Data transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11329682A JPS594358A (en) | 1982-06-30 | 1982-06-30 | Data transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS594358A JPS594358A (en) | 1984-01-11 |
| JPH0230618B2 true JPH0230618B2 (en) | 1990-07-09 |
Family
ID=14608601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11329682A Granted JPS594358A (en) | 1982-06-30 | 1982-06-30 | Data transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS594358A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61170162A (en) * | 1985-01-24 | 1986-07-31 | Hitachi Ltd | Signal transmission system of polling selecting system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5454541A (en) * | 1977-10-11 | 1979-04-28 | Hitachi Ltd | Multi-line control unit |
| JPS5811146B2 (en) * | 1978-04-28 | 1983-03-01 | 株式会社日立製作所 | Communication method using polling emulator |
-
1982
- 1982-06-30 JP JP11329682A patent/JPS594358A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS594358A (en) | 1984-01-11 |
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