JPS587956A - Data transmitting system - Google Patents
Data transmitting systemInfo
- Publication number
- JPS587956A JPS587956A JP56106025A JP10602581A JPS587956A JP S587956 A JPS587956 A JP S587956A JP 56106025 A JP56106025 A JP 56106025A JP 10602581 A JP10602581 A JP 10602581A JP S587956 A JPS587956 A JP S587956A
- Authority
- JP
- Japan
- Prior art keywords
- data
- time
- transmitting device
- transmission device
- response
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は２つの伝送装置間におけるデータ伝送方法に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transmission method between two transmission devices.
従来、この種の方法として第１図に示すようなものがあ
った。第１図において、１は計算機を含む伝送装置、２
は伝送装置１に伝送路を介して接続され、シーケンスを
含む伝送装置である。伝送装置１及び２の動作を第２図
により説明すると、伝送装置１は１時刻ｔ。からデータ
の送出を開始した後、データの信号が安定する時刻ｔ、
〜ｔ、で読込指令（信号）を送出する。これに対し、伝
送装置２は読込指令を受信し始めた後の時刻ｔｔでデー
タを読込み、時刻ｔ、で応答（信号）を伝送装置１に送
出する。伝送装置１はこの応答を受信すると、時刻ｔ、
でデータの送出を停止し、ここにデータ伝送のシーケン
スを完了する。Conventionally, there has been a method of this type as shown in FIG. In FIG. 1, 1 is a transmission device including a computer; 2 is a transmission device including a computer;
is a transmission device that is connected to the transmission device 1 via a transmission path and includes a sequence. The operation of transmission devices 1 and 2 will be explained with reference to FIG. 2. Transmission device 1 is operated at time t. After starting data transmission from , the time t when the data signal becomes stable,
A read command (signal) is sent at ~t. In contrast, the transmission device 2 reads the data at time tt after starting to receive the read command, and sends a response (signal) to the transmission device 1 at time t. When transmission device 1 receives this response, time t,
The data transmission is stopped at , and the data transmission sequence is completed here.
従来のデータ伝送方法は、以上のように構成されていた
ので、データ送出側の伝送装置にデータ送出後に読込指
令を送出するタイマと、読込指令の時間幅を設定するた
めに２つのタイマを備えなければならない欠点があった
。Since the conventional data transmission method was configured as described above, the transmission device on the data sending side is equipped with two timers: one to send a read command after data is sent, and the other to set the time width of the read command. There was a drawback that it had to be.
この発明は、上記のような従来のものの欠点を除去する
ためになされたもので、データ送出側の伝送装置に備え
るべきタイマを一つにすることができるデータ伝送方法
を提供することを目的とする。The present invention was made in order to eliminate the drawbacks of the conventional methods as described above, and an object of the present invention is to provide a data transmission method that can unify the number of timers that should be provided in a transmission device on the data sending side. do.
以下、この発明の一実施例を図について説明する。ここ
でも第１図を参照すると共に第２図に示すタイミング図
を参照して説明する。伝送装置１は、時刻ｔ０から同時
にデータ及び読込指令を伝送装置２へ送出する。読込指
令はタイマの制御により時刻ｔ１まで出力される。伝送
装置２は、時刻ｔ１で読込指令の立下りを検出するので
、ここでデータを読込み、時刻ｔ、で応答を送出する。An embodiment of the present invention will be described below with reference to the drawings. Again, the explanation will be made with reference to FIG. 1 and the timing diagram shown in FIG. The transmission device 1 simultaneously sends data and a read command to the transmission device 2 from time t0. The read command is outputted until time t1 under the control of the timer. Since the transmission device 2 detects the falling edge of the read command at time t1, it reads the data here and sends out a response at time t.
これにより、伝送装置１は、応答を時刻ｔ、後において
受信するので、時刻ｔ、においてデータの送出を停止す
る。伝送装置２は時刻ｔ、になると応答の送出を停止し
、ここにデータ伝送のシーケンスが完了する。As a result, the transmission device 1 receives the response after time t, and therefore stops sending data at time t. The transmission device 2 stops sending the response at time t, and the data transmission sequence is completed at this point.
このような動作から明らかなように、伝送装置１は、読
込指令の送出がデータの送出と同時に開始されるので、
時刻ｔ、を規制するタイマのみを備えればよい。As is clear from such an operation, the transmission device 1 starts sending out the read command at the same time as sending out the data.
It is sufficient to provide only a timer that regulates time t.
以上のように、この発明によれば、データ受信側でデー
タを読込むタイミングな読込指令の立下り時点としたの
で、データの送出に際し、読込指令とデータの送出開始
に時間差をとる必要がなくなり、タイマの使用個数を少
なくできる効果がある。As described above, according to the present invention, since the falling edge of the read command is the timing at which data is read on the data receiving side, there is no need to take a time difference between the read command and the start of data transmission when transmitting data. This has the effect of reducing the number of timers used.
【図面の簡単な説明】
第１図はデータ伝送方法を説明するブロック図。
第２図は従来のデータ伝送方法を説明するタイミング図
、第３図はこの発明の−・実施例によるデータ伝送方法
のタイミング図である。
１．２・・・伝送装置。
代理人 葛野信−（ほか１名）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a data transmission method. FIG. 2 is a timing diagram illustrating a conventional data transmission method, and FIG. 3 is a timing diagram of a data transmission method according to an embodiment of the present invention. 1.2...Transmission device. Agent Shin Kuzuno (1 other person)
Claims (1)
データ伝送方法において、上記第１の伝送装置はデータ
と読込指令を同時に送出開始し、上記第２の伝送装置は
上記読込指令の立下りに応答して上記データを読込むこ
とを特徴とするデータ伝送方法。In the data transmission method of transmitting data from a first transmission device to a second transmission device, the first transmission device starts sending data and a read command at the same time, and the second transmission device starts transmitting data and a read command at the same time. A data transmission method characterized by reading the above data in response to a downlink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106025A JPS587956A (en) | 1981-07-06 | 1981-07-06 | Data transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106025A JPS587956A (en) | 1981-07-06 | 1981-07-06 | Data transmitting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS587956A true JPS587956A (en) | 1983-01-17 |
Family
ID=14423094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56106025A Pending JPS587956A (en) | 1981-07-06 | 1981-07-06 | Data transmitting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587956A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60160246A (en) * | 1984-01-30 | 1985-08-21 | Fanuc Ltd | Data transmission method |
| JPS60163553A (en) * | 1984-02-03 | 1985-08-26 | Matsushita Electric Works Ltd | Parallel transmission system |
| JP2008064172A (en) * | 2006-09-06 | 2008-03-21 | Suzuki Motor Corp | Belt tension regulating device |
-
1981
- 1981-07-06 JP JP56106025A patent/JPS587956A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60160246A (en) * | 1984-01-30 | 1985-08-21 | Fanuc Ltd | Data transmission method |
| JPS60163553A (en) * | 1984-02-03 | 1985-08-26 | Matsushita Electric Works Ltd | Parallel transmission system |
| JP2008064172A (en) * | 2006-09-06 | 2008-03-21 | Suzuki Motor Corp | Belt tension regulating device |
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