JPS6096939A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS6096939A
JPS6096939A JP58205326A JP20532683A JPS6096939A JP S6096939 A JPS6096939 A JP S6096939A JP 58205326 A JP58205326 A JP 58205326A JP 20532683 A JP20532683 A JP 20532683A JP S6096939 A JPS6096939 A JP S6096939A
Authority
JP
Japan
Prior art keywords
transmission
circuit
terminal
signal
data
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.)
Pending
Application number
JP58205326A
Other languages
Japanese (ja)
Inventor
Makihiko Tashiro
田代 牧彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
Shimadzu Corp
Shimazu Seisakusho KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp, Shimazu Seisakusho KK filed Critical Shimadzu Corp
Priority to JP58205326A priority Critical patent/JPS6096939A/en
Publication of JPS6096939A publication Critical patent/JPS6096939A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To smoothen data transmission and to prevent erroneous operations by monitoring an output signal of a transmission preparation completion circuit, by giving a selecting signal corresponding to the output signal for a switching part and controlling data transmission from each terminal to a CPU. CONSTITUTION:After a terminal 2a among terminal 2a-2n has completed data transmission preparation to a CPU, a transmission preparation completion circuit 8a outputs a preparation completion signal E. Then a transmission output monitoring circuit 14 immediately detects the signal E and sends it to a transmission output selecting circuit 16, which gives a signal S corresponding to the signal E for a switching part 6. Thus the switching part 6 turns on a switch 6a, and data from the terminal 2a are transferred to the CPU. When the circuit 14 receives the signal E, said circuit stops scanning until the terminal 2a finishes transmission, and the circuit prevents erroneous transmission of data from other terminals 2b-2n. When the transmission of the terminal 2a is completed, a transmission completion circuit 10a sends a transmission completion signal F to the circuit 14.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は複数の端末機から一つのセンタ機へデータを円
滑に伝送するためのデータ伝送/ステムに関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a data transmission/system for smoothly transmitting data from a plurality of terminals to one center machine.

(ロ)従来技術 一般に、複数の端末機からデータを一括処理するセンタ
機へデータを伝送する場合、個々の端末機について回線
を設けたのではケーブルやインタフェイスが多数必要と
なりデータ伝送/ステム自体が高価になって好ましくな
い。このため従来のデータ伝送システムには各端末機と
センタ機との間に各端末機をセンタ機に選択的に切換え
て接続する切換部を設け、この切換部とセンタ機さの間
で回線を共用する一方、各端末機には端末機からセンタ
機への伝送準備が完了したときに準(Iiii完了信号
を出力する伝送準備完了回路を設けたものがある。そし
て、各端末機は互いの動作状態を探り合い、自端末様以
外から準備完了信号が出力されていない状態のときにの
み切換回路を動作させて当該端末機をセンタ機に接続し
、データ伝送を行なう。しかしながら、このようなもの
では端末機の台数が多くなると相互監視による優先権決
定はソフトウェアも絡んできて複雑になる。しかも、端
末機どうしで何ら同期をとっていないので実際に一つの
端末機がデータ伝送を開始する間に他の端末機もセンタ
機に接続されてしまうことがある。
(b) Prior art In general, when transmitting data from multiple terminals to a central machine that processes data all at once, if a line is provided for each terminal, a large number of cables and interfaces are required, and the data transmission/system itself This is not desirable as it becomes expensive. For this reason, conventional data transmission systems have a switching section between each terminal and the center machine that selectively switches and connects each terminal to the center machine, and a line is connected between this switching section and the center machine. On the other hand, each terminal is equipped with a transmission preparation completion circuit that outputs a semi-(III) completion signal when the preparation for transmission from the terminal to the center is completed. The operating state is checked, and only when a ready signal is not output from any terminal other than the terminal itself, the switching circuit is operated to connect the terminal to the center machine and perform data transmission. When the number of terminals increases, priority determination through mutual monitoring becomes complicated as software is involved.Furthermore, since there is no synchronization between the terminals, only one terminal actually initiates data transmission. In the meantime, other terminals may also be connected to the center machine.

このため−回線に同時に2か所以上からデータが送出さ
れ伝送エラーを生じるという不都合がある。
For this reason, there is a disadvantage that data is sent from two or more places simultaneously on the line, resulting in transmission errors.

(ハ) 目的 本発明は上述の問題点を解消し、複数の端末機から1台
のセンタ機へのデータ伝送が常に円滑に行なわれ、しか
も小形かつ安価に実施できるようにすることを目的とす
る。
(c) Purpose The purpose of the present invention is to solve the above-mentioned problems and to enable data transmission from multiple terminal devices to one center device to be always performed smoothly, and to be able to be implemented in a compact and inexpensive manner. do.

に)構成 本発明はこのような目的を達成するため複数の端末機に
それぞれ設けた伝送準備完了回路からの出力信号をモニ
タする伝送出力モニタ回路と、この伝送出力モニタ回路
でモニタした前記伝送準備完了回路からの出力信号に対
応した端末機を選択する選択信号を各端末機とセンタ機
との間に介設された切換部に与える伝送出力選択回路と
からなる伝送出力制御装置を設け、該伝送出力制御装置
6により各端末機のデータ伝送を統括制御するようにし
ている。
B) Structure In order to achieve such an object, the present invention provides a transmission output monitor circuit that monitors the output signal from a transmission preparation completion circuit provided in each of a plurality of terminals, and a transmission preparation signal monitored by the transmission output monitor circuit. A transmission output control device is provided, comprising a transmission output selection circuit that supplies a selection signal for selecting a terminal corresponding to the output signal from the completion circuit to a switching section interposed between each terminal and the center device. A transmission output control device 6 centrally controls data transmission of each terminal.

(ホ)実施例 以下、本発明を一実施例について、図面に基づいて説明
する。
(E) Example Hereinafter, one example of the present invention will be explained based on the drawings.

図はこの実施例のデータ伝送システムの構成図である。The figure is a configuration diagram of the data transmission system of this embodiment.

このデータ伝送システム1においては、複数ノパーソナ
ルコンピュータなどの端末機2a〜2nとこの端末機2
a〜2nからの伝送データを一括処理する上位コンピュ
ータであるセンタ機4とを有する。各端末機2a〜2n
とセンタ機4との間には各端末機2a〜2nをセンタ機
4に選択的に切換えて接続する切換部6が設けられてい
る。この切換部6は各端末機2a〜2nに個別に設けた
オフ・オフスイッチ6a〜6nで構成きれており、この
切換部6とセンタ機4とが一つの回線で接続される。寸
た、各端末機2a〜2nには末端機2a〜2nからセン
タ機4ヘデータ伝送の準備が完了したときに準備完了信
号Eを出方する伝送準備完了回路8a〜8nならびに、
1i?lt機2a〜2nからセンタ機4ヘデータ伝送が
終了したときに伝送終了信号Fを出力する伝送終了回路
10a〜10nがそれぞれ設けられている。
In this data transmission system 1, there are a plurality of terminals 2a to 2n such as personal computers and the terminal 2.
It has a center machine 4 which is a host computer that collectively processes transmission data from a to 2n. Each terminal 2a to 2n
A switching unit 6 is provided between the terminals 2a to 2n and the center machine 4 to selectively switch and connect each of the terminals 2a to 2n to the center machine 4. This switching section 6 is composed of off/off switches 6a to 6n provided individually for each of the terminals 2a to 2n, and this switching section 6 and the center device 4 are connected through one line. In addition, each terminal device 2a to 2n includes a transmission preparation completion circuit 8a to 8n that outputs a preparation completion signal E when the preparation for data transmission from the terminal device 2a to 2n to the center device 4 is completed, and
1i? Transmission termination circuits 10a to 10n are provided, respectively, for outputting a transmission termination signal F when data transmission from the LT devices 2a to 2n to the center device 4 is completed.

12は各端末機2a〜2nからセンタ機4へのデータ伝
送を統括制御する伝送出力制御装置である。この伝送出
力制御装置12は伝送準備完了回路8a〜8nから出力
される準備完了信号Eと、伝送終了回路10a〜10n
からの伝送終了信号Fとをモニタする伝送出力モニタ回
路14と、この伝送出力モニタ回路14でモニタした伝
送準備完了回路8a〜8nからの準備完了信号Eに基づ
きこの信号に対応した端末機2a〜2nを選択する選択
信号Sを切換部6に出力する伝送出力選択回路16とか
らなる。なおこの実施例における伝送出力モニタ回路1
4は伝送準備完了回路8a〜8nとの接点14a〜14
nを高速スキャンニングするリングカウンタで構成され
る。
Reference numeral 12 denotes a transmission output control device that centrally controls data transmission from each terminal device 2a to 2n to the center device 4. This transmission output control device 12 receives a ready signal E outputted from the transmission preparation completion circuits 8a to 8n, and a transmission completion circuit 10a to 10n.
A transmission output monitor circuit 14 monitors a transmission end signal F from the transmission output monitor circuit 14, and a transmission output monitor circuit 14 monitors the transmission completion signal F from the transmission output monitor circuit 14. The transmission output selection circuit 16 outputs a selection signal S for selecting 2n to the switching section 6. Note that the transmission output monitor circuit 1 in this embodiment
4 is a contact point 14a to 14 with the transmission ready circuit 8a to 8n.
It consists of a ring counter that scans n at high speed.

次に、このデータ伝送システムにおける伝送出力制御装
置12の伝送制御動作を主体に説明する。
Next, the transmission control operation of the transmission output control device 12 in this data transmission system will be mainly explained.

伝送出力モニタ回路14は伝送準備完了回路8a〜8n
との接点14a〜14nを1点当り10μs程度の高速
でスキャンニングして伝送率(1iii完了回路8a〜
8nからの準備完了信号Eをモニタしている。今、端末
機2a〜2nのうち1つの端末機(たとえば2a)がセ
ンタ機4へのデータ伝送準備を完了すると、これに応答
して1ム送準(+iii完了回路8aから準備完了信号
Eが出力される。従って、伝送出力モニタ回路14は直
ちKこの出力された準備完了信号Eを検出して次段の伝
送出力選択回路16に送出する。伝送出力選択回路16
は入力された準備完了信号EVc基づき、このf;fi
;Eに対応した端末機2aを選択する選択信号Sを切換
部6に与える。切換部6ではこの選択信号Sに基つき当
該端末機2aに対応するオフ オフスイッチ6aがオン
される。従って、端末機ンaからデータがセンタ機4に
伝送される。また、伝送出力モニタ回路14は準備完了
信号Eを人力すると当該端末機2aの伝送が終了するま
でスキャンニング動作を停止する。このため、他の端末
機2b〜2nからデータが誤って伝送されることがない
。選択された端末機2aのデータ伝送が終了すると、こ
の端末機2aに対応した伝送終了回路10aから伝送終
了信号Fが伝送出力モニタ回路14に出力される。伝送
出力モニタ回路14はこの伝送終了信号Fの入力により
直ちにスキャンニ/グを再開し、別の端末機2b〜2n
の伝送準備完了回路8b、13nからの準備完了信号E
iモニタする。このようにして、データ伝送準備が完了
した端末機2a〜2nを順次選択し、選択した端末機2
a〜2nからのみセンタ機4ヘデータが伝送される。
The transmission output monitor circuit 14 is the transmission ready circuit 8a to 8n.
The transmission rate (1iii completion circuit 8a to
The preparation completion signal E from 8n is monitored. Now, when one terminal (for example, 2a) among the terminals 2a to 2n completes preparations for data transmission to the center device 4, in response, a 1mu transmission (+iii preparation completion signal E is sent from the completion circuit 8a). Therefore, the transmission output monitor circuit 14 immediately detects the output ready signal E and sends it to the next stage transmission output selection circuit 16.Transmission output selection circuit 16
is based on the input ready signal EVc, and this f;fi
;A selection signal S for selecting the terminal 2a corresponding to E is given to the switching unit 6. Based on this selection signal S, the switching unit 6 turns on the off-off switch 6a corresponding to the terminal 2a. Therefore, data is transmitted from the terminal device a to the center device 4. Further, when the transmission output monitor circuit 14 receives the ready signal E manually, it stops the scanning operation until the transmission of the terminal 2a is completed. Therefore, data will not be erroneously transmitted from other terminals 2b to 2n. When the data transmission of the selected terminal 2a is completed, a transmission end signal F is outputted to the transmission output monitor circuit 14 from the transmission end circuit 10a corresponding to this terminal 2a. The transmission output monitor circuit 14 immediately resumes scanning upon input of this transmission end signal F, and scans another terminal 2b to 2n.
Ready signal E from transmission ready circuits 8b and 13n of
iMonitor. In this way, the terminals 2a to 2n that are ready for data transmission are sequentially selected, and the selected terminal 2
Data is transmitted to the center machine 4 only from a to 2n.

(へ)効果 以」二のように本発明によれば、伝送出力制御装置を設
け、この伝送出力制御装置により各端末機のデータ伝送
を統括して制御するようにしたので、各端末機からセン
タ機へのデータ伝送が常に円滑に行なわれ、誤動作が防
止できるとともて、伝送出力制御装置は比較的簡単な回
路構成で実現できるので小形かつ安価に実施できるとい
う優にだ効果が得られる。
According to the present invention, a transmission output control device is provided, and the data transmission of each terminal device is centrally controlled by this transmission output control device. Data transmission to the center machine is always carried out smoothly and malfunctions can be prevented, and since the transmission output control device can be realized with a relatively simple circuit configuration, it has the advantage of being compact and inexpensive. .

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の一実施例を示すデータ伝送/ステムの構
成図である。 1 データ伝送システム、2a〜2n・端末機、4・セ
ンタ機、6・・切換部、8a〜8n・伝送rl/!備完
了回路、12・・伝送出力制御装置、141ム送出力モ
ニタ回路、16・・伝送出力選択回路。 出 願 人 株式会社島津製作所 代 理 人 弁理士岡口j和秀
The drawing is a block diagram of a data transmission/system showing an embodiment of the present invention. 1 Data transmission system, 2a to 2n, terminal device, 4, center device, 6, switching unit, 8a to 8n, transmission rl/! Preparation completion circuit, 12...transmission output control device, 141 mu transmission output monitor circuit, 16...transmission output selection circuit. Applicant: Shimadzu Corporation Representative: Patent Attorney Kazuhide Okaguchi

Claims (1)

【特許請求の範囲】[Claims] (1) 複数の端末機とこの各端末機からの伝送データ
を一括処理するセンタ機とを有し、がっ、この各端末機
とセンタ機との間には端末機をセンタ機に選択的に切換
えて接続する切換部を設ける一方、前記各端末機には端
末機からセンタ機への伝送準備が完了したときに準備完
了信号を出力する伝送準備完了回路をそれぞれ接続した
データ伝送システムにおいて、前記伝送準備完了回路か
らの準備完了信号をモニタする伝送出力モニタ回路と、
この伝送出力モニタ回路でモニタした前記伝送準備完了
回路からの準備完了信号に基づき、この信号に対応した
端末機を選択する選択信号を前記切換部に与える伝送出
力選択回路とからなる伝送出力制御装置を設けたことを
特徴とするデータ伝送システム。
(1) It has a plurality of terminals and a center machine that collectively processes data transmitted from each terminal. In the data transmission system, a switching unit is provided for switching the connection to the terminal, and each terminal is connected to a transmission preparation completion circuit that outputs a preparation completion signal when the preparation for transmission from the terminal to the center device is completed, a transmission output monitor circuit that monitors a ready signal from the transmission ready circuit;
A transmission output control device comprising: a transmission output selection circuit that supplies a selection signal to the switching section to select a terminal corresponding to the signal based on a ready signal from the transmission ready completion circuit monitored by the transmission output monitor circuit; A data transmission system characterized by being provided with.
JP58205326A 1983-10-31 1983-10-31 Data transmission system Pending JPS6096939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58205326A JPS6096939A (en) 1983-10-31 1983-10-31 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58205326A JPS6096939A (en) 1983-10-31 1983-10-31 Data transmission system

Publications (1)

Publication Number Publication Date
JPS6096939A true JPS6096939A (en) 1985-05-30

Family

ID=16505077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58205326A Pending JPS6096939A (en) 1983-10-31 1983-10-31 Data transmission system

Country Status (1)

Country Link
JP (1) JPS6096939A (en)

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