JPS6179335A - Data transmission equipment - Google Patents
Data transmission equipmentInfo
- Publication number
- JPS6179335A JPS6179335A JP59202737A JP20273784A JPS6179335A JP S6179335 A JPS6179335 A JP S6179335A JP 59202737 A JP59202737 A JP 59202737A JP 20273784 A JP20273784 A JP 20273784A JP S6179335 A JPS6179335 A JP S6179335A
- Authority
- JP
- Japan
- Prior art keywords
- data
- switching
- reception
- controlled
- controlled device
- 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.)
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- Selective Calling Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はデータ伝送装置に関し、特にデータ授受方式を
改良したデータ伝送装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a data transmission device, and particularly to a data transmission device with an improved data transfer method.
第４図は従来のデータ伝送装置の構成図である。このデ
ータ伝送装置は、例えば遠方監視制御装置に適用される
もので、遠方に散在する複必要に応じて制御操作信号を
被制御装置１−１〜１−ｎに与えるものである。FIG. 4 is a block diagram of a conventional data transmission device. This data transmission device is applied to, for example, a remote monitoring and control device, and provides control operation signals to controlled devices 1-1 to 1-n, depending on the needs of multiple devices scattered at a distance.
そこで、各被制御装置１−１〜１−ｎと制御装置２との
間のデータ授受は次のような動作によって行なわれてい
る。被制御装置ノー１〜１−ｎは、予め第１の系Ｉと第
２の系■とに分けられ、第１の系Ｉは被制御装置１−１
〜１−ｍ、第２の系■は被制御装置１−ｒｎ＋１〜１−
ｎと設定される。これら被制御装置ノー１〜１−ｎは制
御装置２の回線切換部３の各切換スイッチ８１．８２に
それぞれ接続されている。すなわち、第１の系Ｉの各被
制御装置ノー１〜ｚ−ｍは切換スイッチｓ１に接続され
、第２の系■の各被制御装置１−ｍ＋１〜１−ｎは切換
スイッチＳ２に接続されている。さらに切換スイッチ８
１．８２には、これらスイッチ８１．８２を切換えル切
換ス’ｆ ｙ ｆ ８３ａ 、 ８．９ｂがそれぞれ接
続されている。Therefore, data exchange between each of the controlled devices 1-1 to 1-n and the control device 2 is performed by the following operation. Controlled devices Nos. 1 to 1-n are divided in advance into a first system I and a second system (2), and the first system I is controlled devices 1-1.
~1-m, the second system ■ is the controlled device 1-rn+1~1-
It is set to n. These controlled devices Nos. 1 to 1-n are connected to respective changeover switches 81 and 82 of the line switching section 3 of the control device 2, respectively. That is, each controlled device No. 1 to z-m of the first system I is connected to the changeover switch s1, and each controlled device No. 1 to 1-n of the second system I is connected to the changeover switch S2. ing. Furthermore, selector switch 8
Switches 83a and 8.9b for switching these switches 81.82 are connected to 1.82, respectively.
そこで、これら切換スイッチ８１，８２゜Ｓ３ａ 、
ＳＪｂが通信局決定部４から発せられる通信局切換指令
を受けて切換制御信号をそれぞれ送出する第１．第２お
よび第３の切換選択部５゜６．７により切換動作してデ
ータ授受を行なう。Therefore, these changeover switches 81, 82°S3a,
The first SJb receives a communication station switching command issued from the communication station determining unit 4 and sends out a switching control signal. The second and third switching selection sections 5.about.6.7 perform switching operations to exchange data.
ここで、第１の系Ｉの被制御装置を１−１〜１−５とし
、第２の系■の被制御装置を１−６〜１−１０としてデ
ータ授受を説明すると、まず切換スイッチＳ１は切換端
ａ１に、切換スイッチＳ２は切換端ａ６に、また切換ス
イッチＳＪａは切換端ｂノに、切換スイッチＳｊｂは切
換端Ｃ２にそれぞれ接続され、この状態で被制御装置１
−１゜１−６に対してポーリング信号ＰＩ、Ｐ６が第５
図に示すようにそれぞれ同時に送られる。これらポーリ
ング信号ＰＩ、Ｐ６を受けた被制御装置１７１．１−６
は、それぞれデータＤＩ。Here, data exchange will be explained assuming that the controlled devices of the first system I are 1-1 to 1-5 and the controlled devices of the second system I are 1-6 to 1-10. First, the changeover switch S1 is connected to the switching end a1, the changeover switch S2 is connected to the changeover end a6, the changeover switch SJa is connected to the changeover end b, and the changeover switch Sjb is connected to the changeover end C2. In this state, the controlled device 1
-1° For 1-6, polling signal PI, P6 is the fifth
As shown in the figure, each is sent simultaneously. Controlled device 171.1-6 that received these polling signals PI and P6
are each data DI.
Ｄ６を送出し、これらデータＤＩ、Ｄ６はそれぞれ回線
切換部３を介して送受信制御部８．９に送られる。さら
に、データＤＩ、Ｄ６はそれぞれ入出力制御部１０．１
１および入出力部１２を通ってデータ処理部などに送ら
れる。そうして、送受信制御部８．９によりデータＤＩ
。D6 is transmitted, and these data DI and D6 are each sent to the transmission/reception control section 8.9 via the line switching section 3. Furthermore, data DI and D6 are input/output control unit 10.1, respectively.
1 and input/output section 12, and is sent to a data processing section or the like. Then, the data DI is transmitted by the transmission/reception control unit 8.9.
.
Ｄ６の受信終了が検出されると、通信局決定部４は切換
スイッチＳ１を切換端ａ２に切換接続して被制御装置１
−２にポーリング信号Ｐ２を送出させ、また切換スイッ
チＳ２を切換端ａ７に切換接続して被制御装置１１−７
にポーリング信号Ｐ７を送出させる。このようにして、
各切換スイッチ８１．８２をデータ受信終了時に各個別
に切換えてデータが収集される。そうして、第１の系Ｉ
と第２の系■との被制御装置１−１〜１−ｎのデータ収
集が終了すると、通信局決定部４から発する通信局切換
指令により切換スイッチＳＪａが切換端ｂ２側に、切換
スイッチ８３ｂが切換端ｃノ側にそれぞれ切換接続され
るとともに、切換スイッチＳ１が切換端ａ１に、切換ス
イッチＳ２が切換端ａ６に切換接続される。このような
状態で今度は第２の系■の被制御装置１−６〜１−１０
のデータが順次送受信制御部８に送られ、第１の系Ｉの
被制御装置ノー１〜１−５のデータが順次送受信制御部
９に送られる。When the end of reception of D6 is detected, the communication station determining unit 4 connects the changeover switch S1 to the changeover end a2 to switch the controlled device 1.
-2 to send out the polling signal P2, and switch S2 is connected to the switching terminal a7 to control the controlled device 11-7.
to send out a polling signal P7. In this way,
Data is collected by individually switching the changeover switches 81 and 82 at the end of data reception. Then, the first system I
When the data collection of the controlled devices 1-1 to 1-n with the second system (3) and the second system (2) is completed, the communication station switching command issued from the communication station determination unit 4 causes the changeover switch SJa to switch to the switching end b2 side, and the changeover switch 83b are connected to the switching end c, respectively, and the changeover switch S1 is connected to the changeover end a1, and the changeover switch S2 is connected to the changeover end a6. In this state, the controlled devices 1-6 to 1-10 of the second system
The data of the controlled devices Nos. 1 to 1-5 of the first system I are sequentially sent to the transmission and reception control section 9.
このように、従来は各系１．ＩＩ別に順次被制御装置１
−１〜１−ｎのデータを収集し、このデータ収集が終了
すると、データ収集の系［、Ｉｔを切換えてデータ収集
を゛継続するので、この系１゜■を切換えるときに次の
ような欠点がある。すなわち、切換スイッチＳＪａ ｔ
’ ８３ｂは同時に切換接続されなければならない。し
たがって、第５図に示すように被制御装置１−５のデー
タＤ５の受信時間が被制御装置１−１０のデータＤＩＯ
の受信時間よりも一時間短いと、送受信制御部８側での
次のデータ受信が一時間だけ待たされてしまう゛ことに
なる。In this way, conventionally each system 1. Controlled device 1 sequentially by II
-1 to 1-n are collected, and when this data collection is completed, the data collection system [, It is switched to continue data collection, so when switching this system 1゜■, the following There are drawbacks. That is, the changeover switch SJa t
' 83b must be switched and connected at the same time. Therefore, as shown in FIG. 5, the reception time of the data D5 of the controlled device 1-5 is equal to
If the receiving time is one hour shorter than the receiving time, the transmission/reception control section 8 will have to wait for the next data reception for only one hour.
本発明は上記実情に−づいてなされたもので、その目的
とするところは、データ授受時の待ち時間を無くし得、
連続してデータ授受ができるデータａｔ装置を提供する
ことにある。The present invention has been made based on the above-mentioned circumstances, and its purpose is to eliminate the waiting time when transmitting and receiving data;
The object of the present invention is to provide a data at device that can continuously exchange data.
５一
本発明は、複数の子局が共通接続された切換回路を少な
くとも２つ親局に設け、これら切換回路を、データ授受
を行なう予め設定された前記子局の順序に従って各切換
回路のうちデータ授受の終了した切換回路からＩＩ次切
換制御してデータ授受し、もってデータ授受時の待ち時
間を無したデータｇｔ装置である。51 The present invention provides a master station with at least two switching circuits to which a plurality of slave stations are commonly connected, and switches these switching circuits among the switching circuits according to a preset order of the slave stations in which data is exchanged. This is a data gt device that performs second switching control from a switching circuit that has completed data transmission and reception to transmit and receive data, thereby eliminating waiting time during data transmission and reception.
以下、本発明のデータａ！装置の一実施例を遠方監視制
御装置に適用した場合について第１図および第３図を参
照して説明する。第１図はデータイλＬ装置の構成図で
ある。２０−１〜２０−ｎは遠方に散在する被制御装置
である。一方、３０は制御装置（親局）であって、この
制御装量３０の回線切換部３ノに各被制御装置２０−１
〜２０−ｎが接続され各被制御装置２０−１〜２０−ｎ
のデータが制御装置３０に収集されるようになっている
。回線切換部３１は、各被制御装置２０−１〜２’０−
ｎがそれぞれ共通接続された切換端子Ｒ１〜Ｒ，、Ｔ
Ｍ’ｎを有する第１の切換スイッチＳ１θおよび第２の
切換スイッチ８１１から構成されるもので、これら第１
および第２の切換スイッチ８１０，８１１は、通信局決
定部３２から発せられる切換端子を指定した通信局切換
指令を受ける切換選択部３３．３４によりそれぞれ作成
される切換制御信号を受けて指定切換端子に切換動作す
るものである。すなわち、第１の切換スイッチ８１０は
切換選択部３３からの切換制御信号により切換動作し、
第２の切換スイッチ８１１は切換選択部３４からの切換
制御信号によシ切換動作することになる。Hereinafter, data of the present invention a! A case in which an embodiment of the device is applied to a remote monitoring and control device will be described with reference to FIGS. 1 and 3. FIG. 1 is a block diagram of a data λL device. 20-1 to 20-n are controlled devices scattered far away. On the other hand, 30 is a control device (master station), and each controlled device 20-1 is connected to the line switching section 3 of this control device 30.
~20-n are connected to each controlled device 20-1~20-n
data is collected by the control device 30. The line switching unit 31 controls each controlled device 20-1 to 2'0-.
Switching terminals R1 to R, , T to which n are connected in common, respectively
It is composed of a first changeover switch S1θ and a second changeover switch 811 having M'n.
The second changeover switches 810 and 811 are configured to switch to designated switching terminals in response to switching control signals created by switching selection sections 33 and 34, respectively, which receive a communication station switching command specifying a switching terminal issued from the communication station determination section 32. The switching operation is as follows. That is, the first changeover switch 810 is operated by a changeover control signal from the changeover selection section 33;
The second changeover switch 811 is operated in response to a changeover control signal from the changeover selection section 34.
送受信制御部３５および３６は、各被制御装置２０〜１
〜２０−ｎに対してポーリング信号を送出するとともに
、各被制御装置２０−１〜２０−ｎからの各データを受
信して入出力制御部３７゜３８にそれぞれ送出し、かつ
データ受信の終了を検出する機能を持ったものである。The transmission/reception control units 35 and 36 control each controlled device 20 to 1.
20-n, receives each data from each controlled device 20-1 to 20-n, and sends it to the input/output control unit 37, 38, and ends data reception. It has the function of detecting.
さて、前記通信局決定部３２は、予め設定された各被制
御装置２０−１〜２０−ｎとの間のデータ通信の順序（
例えば被制御装置２０−１ 。Now, the communication station determining unit 32 determines the order of data communication with each controlled device 20-1 to 20-n (
For example, the controlled device 20-1.
２θ−２＝・２０−ｎ、２θ−’ ＋ ”’ ）が記憶
され、このデータ通信順序に従って第１および第２の切
換スイッチ８１０，８１１のうち１台の被制御装置２０
−１〜２０−ｎに対するデータ通信が終了した切換スイ
ッチ８１０ 、８１１から逐次切換端子Ｒ１禰ｒＨ、Ｔ
Ｉ−ＪＴ′ｐを指定した通信局切換指令を発する機能を
持ったものである。2θ-2=・20-n, 2θ-' + "') is stored, and one controlled device 20 of the first and second changeover switches 810 and 811 is stored in accordance with this data communication order.
From the changeover switches 810 and 811 where the data communication for -1 to 20-n has ended, the successive changeover terminals R1, RH, and T
It has a function of issuing a communication station switching command specifying I-JT'p.
なお、入出力制御部３７．３８には、入出力部３９を介
して例えばデータ処理部（不図示）が設けられ、このデ
ータ処理部によシ各被制御装置２０−１〜２０−ｎの状
態等を監視するための監視用データが作成されるように
なっている。The input/output control units 37 and 38 are provided with, for example, a data processing unit (not shown) via the input/output unit 39, and this data processing unit controls each of the controlled devices 20-1 to 20-n. Monitoring data for monitoring the status etc. is created.
次に上記の如く構成された装置の動作、特にデータ通信
の動作について第２図に示すデータ通信フローチャート
に従って説明する。なお、被制御装置２０−１〜２０−
ｎは１θ台とする。まず、第１の切換スイッチ８１０は
切換端子Ｒ１に接続され、また第２の切換スイッチ８１
１は切換端子Ｔ２に接続されている。この接続状態で送
受信制御部３５から被制御装置２０− ＩＫ対してポー
リング信号Ｐノが送出され、これと同時に送受信制御部
３６から被制御装置２ｏ−２に対してポーリング信号Ｐ
２が送出される。このポーリング信号Ｐノを受けだ被制
御装置２ｏ−１のデータＤ７送出時間が１．４秒であり
、被制御装置２０−２のデータＤ２送出時間が０．８秒
であると、被制御装置２０−２のデータ通信が速く終了
し、このデータ通信終了時が送受信制御部３６により検
出される。すると、送受信制御部３４からはデータ通信
終了を示す信号が通信局決定部３２に送出され、この信
号を受けて通信局決定部３２は次のデータ通信を行なう
被制御装置すなわち２０−３を判断し、この被制御装置
２０−３とデータ通信を行なうための第２のスイッチ８
１１の切換端子Ｔ３を判別してこの端子Ｔ３を指定した
通信局切換指令を切換選択部３４に発するとともに、被
制御装置２０−３とデータ通信を行なうことを示す信号
を送受信制御部３６に送出する。これにより、第２の切
換スイッチ８１１は切換端子Ｔ３に切換接続されるとと
もに、送受信制御部３６から被制御装置２０−３に対し
てポーリング信号Ｐ３が送出されてデータＤ３が収集さ
れる。そうして、送受信制御部３６側で被制御装置２０
−３とのデータ通信を行なっている間に、被制御装置２
０−１とのデータ通信が終了すると、通信局決定部・３
２は切換選択部３３に対して被制御装置２０−４とデー
タ通信を行なうだめの切換端子Ｒ４を指定した通信局切
換指令を発するとともに、送受信制御部３５に対して被
制御装置２０−４とデータ通信を行なうことを示す信号
が送出される。Next, the operation of the apparatus configured as described above, particularly the data communication operation, will be explained according to the data communication flowchart shown in FIG. Note that the controlled devices 20-1 to 20-
Let n be on the order of 1θ. First, the first changeover switch 810 is connected to the changeover terminal R1, and the second changeover switch 81
1 is connected to the switching terminal T2. In this connected state, the transmission/reception control unit 35 sends a polling signal P to the controlled device 20-IK, and at the same time, the transmission/reception control unit 36 sends a polling signal P to the controlled device 2o-2.
2 is sent. If the data D7 sending time of the controlled device 2o-1 receiving this polling signal P is 1.4 seconds, and the data D2 sending time of the controlled device 20-2 is 0.8 seconds, the controlled device The data communication of 20-2 ends quickly, and the transmission/reception control section 36 detects the end of this data communication. Then, the transmission/reception control unit 34 sends a signal indicating the end of data communication to the communication station determination unit 32, and upon receiving this signal, the communication station determination unit 32 determines the controlled device to perform the next data communication, that is, 20-3. and a second switch 8 for performing data communication with this controlled device 20-3.
11 switching terminal T3 and issues a communication station switching command specifying this terminal T3 to the switching selection unit 34, and also sends a signal indicating that data communication is to be performed with the controlled device 20-3 to the transmission/reception control unit 36. do. As a result, the second changeover switch 811 is connected to the changeover terminal T3, and the transmission/reception control section 36 sends out a polling signal P3 to the controlled device 20-3 to collect data D3. Then, on the transmission/reception control unit 36 side, the controlled device 20
-3 while performing data communication with the controlled device 2.
When the data communication with 0-1 is completed, the communication station determination unit 3
2 issues a communication station switching command to the switching selection unit 33 specifying the switching terminal R4 to perform data communication with the controlled device 20-4, and also issues a communication station switching command to the transmission/reception control unit 35 to select the switching terminal R4 for data communication with the controlled device 20-4. A signal indicating that data communication is to be performed is sent.
これにより、ポーリング信号Ｐ４が被制御装置２０−４
に送られて、データＤ４が収集される。As a result, the polling signal P4 is transmitted to the controlled device 20-4.
data D4 is collected.
このデータＤ４の送出時間が０．８秒であり、データＤ
３の送出時間が１．９秒であって、被制御装置２０−４
とのデータ通信が速く終了すると、上記した動作と同様
に送受信制御部３５および通信局決定部３２が動作して
第１の切換スイッー１〇−
チ８１０がＲ５に切換接続され、被制御装置２０−５の
データＤ５が収集される。このようにして、被制御装置
２０−１〜２０−ｎの各データが、被制御装置２０−１
．２０−２．・・・２０−ｎ。The sending time of this data D4 is 0.8 seconds, and the data D
3 is 1.9 seconds, and the controlled device 20-4
When the data communication with the controlled device 20 is quickly completed, the transmission/reception control section 35 and the communication station determination section 32 operate in the same manner as described above, and the first changeover switch 10-ch 810 is switched to R5 and connected to the controlled device 20. -5 data D5 is collected. In this way, each data of the controlled devices 20-1 to 20-n is transmitted to the controlled device 20-1.
．． 20-2. ...20-n.
２０−１の順序に従って第１および第２の切換スイッチ
ＳＪ Ｏ、８１Ｊが切換わり、収集される。なお、第３
図では、被制御装置２０−５のデータ通信時間が１．３
秒、２θ−６が１．１秒、２０−７が１．６秒、２０−
８が１．５秒、２θ−９が１．１秒、２０−１０が１．
４秒の場合のデータ収集タイミング図を示している。The first and second changeover switches SJO, 81J are switched in accordance with the order of 20-1, and the data are collected. In addition, the third
In the figure, the data communication time of the controlled device 20-5 is 1.3
seconds, 2θ-6 is 1.1 seconds, 20-7 is 1.6 seconds, 20-
8 is 1.5 seconds, 2θ-9 is 1.1 seconds, 20-10 is 1.
A data collection timing diagram for the case of 4 seconds is shown.
このように本発明の装置においては、被制御装置２０−
１〜２０−ｎをそれぞれ共通接続した第１および第２の
切換スイッチ８１０，８１１が設けられ、これら第１お
よび第２の切換スイッチ８１０，８１１を、被制御装置
２θ−１〜２０−ｎのデータ通信順序に従ってデータ通
信終了した切換スイッチ８１０．８７１から逐次切換接
続してデータを収集するので、データ通信の際にデータ
受信までに待ち時間が発生することなく、データ通信を
連続しで、かつスムーズに行なえる。さらに、データは
被制御装置２０−１゜３０−２．・・・２０−ｎ、２０
−１の順序に収集されるので、データ処理が従来よりも
簡単とな９、その処理時間も速くなる。In this way, in the device of the present invention, the controlled device 20-
First and second changeover switches 810 and 811 are provided, which are commonly connected to the controlled devices 2θ-1 to 20-n, respectively. Since data is collected by sequentially switching and connecting from the changeover switch 810.871 where data communication has ended in accordance with the order of data communication, there is no waiting time before data reception during data communication, and data communication can be performed continuously and It can be done smoothly. Further, the data is stored in the controlled devices 20-1, 30-2. ...20-n, 20
Since data is collected in the order of -1, data processing is simpler9 and the processing time is faster than before.
なお、本発明は上記一実施例に限定されるものではない
。上記一実施例では、第１および第２の切換スイッチ８
１０．８１１を用いて被制御装’１２０−１〜２０−ｎ
を切換えているが、切換スイッチを複数（例えば３つ）
設け、これら切換スイッチを、データ通信する被制御装
置の順序に従ってデータ通信終了した切換スイッチから
遂次切換えるようにしても良い。Note that the present invention is not limited to the above embodiment. In the above embodiment, the first and second changeover switches 8
Controlled device '120-1 to 20-n using 10.811
is switched, but multiple switches (for example, three) are used.
Alternatively, the changeover switches may be sequentially changed over in accordance with the order of the controlled devices communicating with each other, starting from the changeover switch with which the data communication has been completed.
本発明によれば、複数の子局が共通接続された切換回路
を少なくとも２つ親局に設け、これら切換回路を、デー
タ授受を行なう子局の順序に従ってデータ授受の終了し
た切換回路から遂次切換えるので、データ授受時の待ち
時間を無くし得、連続してデータな授受できるデータ伝
速装置を提供できる。According to the present invention, at least two switching circuits to which a plurality of slave stations are commonly connected are provided in the master station, and these switching circuits are sequentially connected to each other from the switching circuit that has finished transmitting and receiving data according to the order of the slave stations that exchange data. Since the switching is performed, it is possible to eliminate the waiting time during data transmission and reception, and it is possible to provide a data transmission device that can continuously transmit and receive data.
第１図は本発明に係るデータイ＝を装置の一実施例を示
す構成図、第２図は第１図に示す装置のデータ通信フロ
ーチャート、第３図は第１図に示す装置のデータ収集タ
イミング図、第４図は従来のデータイλＬ装置の構成図
、第５図は第４図に示す装置のデータ収集タイミング図
である。
２０−１〜２０−ｎ・・・被制御装置、３０・・・制御
装置、３ノ・・・回線切換部、Ｓ１０・・・第１の切換
スイッチ、８１１・・・第２の切換スイッチ、３２・・
・通信局決定部、３３．３４・・・切換選択部、３５゜
３６・・・送受信制御部、３７．３８・・・入出力制御
部、３９・・・入出力部。Fig. 1 is a block diagram showing an embodiment of the data processing apparatus according to the present invention, Fig. 2 is a data communication flowchart of the apparatus shown in Fig. 1, and Fig. 3 is a data collection timing of the apparatus shown in Fig. 1. FIG. 4 is a block diagram of a conventional data λL device, and FIG. 5 is a data collection timing diagram of the device shown in FIG. 20-1 to 20-n...Controlled device, 30...Control device, 3rd...Line switching unit, S10...First changeover switch, 811...Second changeover switch, 32...
- Communication station determination unit, 33.34... Switching selection unit, 35°36... Transmission/reception control unit, 37.38... Input/output control unit, 39... Input/output unit.
Claims (1)
送装置において、前記親局に設けられ、前記子局が共通
接続されてこれら子局ごとに切換わる少なくとも２つの
切換回路と、データ授受を行なう前記子局の順序が予め
設定され、この設定された順序に従って前記各切換回路
を、前記子局とのデータ授受が終了した切換回路から逐
次切換える切換制御手段とを具備したことを特徴とする
データ伝送装置。A data transmission device for transmitting and receiving data between a plurality of slave stations and a master station, comprising: at least two switching circuits provided in the master station, to which the slave stations are commonly connected and switched for each slave station; An order in which the slave stations exchange data is set in advance, and switching control means is provided for sequentially switching each of the switching circuits in accordance with the set order, starting from the switching circuit that has completed data exchange with the slave station. data transmission equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59202737A JPS6179335A (en) | 1984-09-27 | 1984-09-27 | Data transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59202737A JPS6179335A (en) | 1984-09-27 | 1984-09-27 | Data transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6179335A true JPS6179335A (en) | 1986-04-22 |
Family
ID=16462326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59202737A Pending JPS6179335A (en) | 1984-09-27 | 1984-09-27 | Data transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6179335A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56146390A (en) * | 1980-04-15 | 1981-11-13 | Fuji Facom Corp | 2:n remote monitor control system |
| JPS58213547A (en) * | 1982-06-04 | 1983-12-12 | Mitsubishi Electric Corp | Method for collecting data of remote supervising device |
-
1984
- 1984-09-27 JP JP59202737A patent/JPS6179335A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56146390A (en) * | 1980-04-15 | 1981-11-13 | Fuji Facom Corp | 2:n remote monitor control system |
| JPS58213547A (en) * | 1982-06-04 | 1983-12-12 | Mitsubishi Electric Corp | Method for collecting data of remote supervising device |
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