JPH0752882B2 - Time division multiplex transmission system - Google Patents
Time division multiplex transmission systemInfo
- Publication number
- JPH0752882B2 JPH0752882B2 JP1297073A JP29707389A JPH0752882B2 JP H0752882 B2 JPH0752882 B2 JP H0752882B2 JP 1297073 A JP1297073 A JP 1297073A JP 29707389 A JP29707389 A JP 29707389A JP H0752882 B2 JPH0752882 B2 JP H0752882B2
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- JP
- Japan
- Prior art keywords
- processing
- terminal device
- terminal
- unit
- polling
- Prior art date
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は時分割多重伝送システムに関するものである。The present invention relates to a time division multiplex transmission system.
［従来の技術］ 第４図は時分割多重伝送システムの構成図を示し、この
システムからは一つの親器１と複数の端末器21…とを２
芯の伝送線ｌで接続し、端末器21…は親器１からの定期
ポーリングに対応して監視入力データ等を返信信号で応
答したり、緊急処理を要するデータについては、割り込
み信号を親器１に返して親器１からの端末アドレスサー
チ、データ採集、割り込みクリアの各ポーリングに一連
応答している。第５図（ａ）は親器１から定期ポーリン
グ時に伝送される１アドレスに対応した伝送信号を示し
ており、この伝送信号はスタート信号ST、モード信号M
D、アドレス信号AD、バイトカウンタBC、制御データ信
号CD、チェック信号CRC、第５図（ｂ）に示す返信信号R
Dを返信させる返信帯RTからなる可変長フォーマットの
信号で構成され、例えばベースバンドで伝送されるよう
になっている。[Prior Art] Fig. 4 when a structural diagram showing an division multiplexing transmission system, one master unit 1 and a plurality of terminal units 2 1 ... and from this system 2
Connected by transmission line l of the core, the terminal device 2 1 ... replies the response signal monitoring input data and the like corresponding to the periodic polling from the master set 1, the urgent data processing, the interrupt signal parent It returns to the device 1 and makes a series of responses to the polling of the terminal address search, the data collection, and the interrupt clear from the master device 1. FIG. 5 (a) shows a transmission signal corresponding to one address transmitted from the master device 1 at the time of regular polling. The transmission signal is a start signal ST and a mode signal M.
D, address signal AD, byte counter BC, control data signal CD, check signal CRC, reply signal R shown in FIG. 5 (b)
It is composed of a variable-length format signal including a reply band RT for returning D, and is transmitted in, for example, a base band.
返送信号RDはモード信号md、バイトカウンタbc、データ
dt、チェック信号Ccrcからなる可変長フォーマットの信
号で構成され、例えば伝送線ｌを端末器21…で短絡する
などして電流モード信号として親器１へ送信するように
なっている。Return signal RD is mode signal md, byte counter bc, data
dt, is constituted by a signal of a variable-length format consisting check signal CCRC, for example, as transmitted to the master unit 1 to the transmission line l as a current mode signal, such as by short-circuit terminal unit 2 1 ....
上記端末器21…からの割り込み信号はポーリング中の伝
送信号のスタート信号STの伝送タイミングで電流モード
によって親器１へ伝送される。Interrupt signal from the terminal unit 2 1 ... is transmitted by the current mode transmission timing of the start signal ST of the transmission signal during polling to the parent device 1.
［発明が解決しようとする課題］ ところで上記従来例では親器１における割り込み処理の
端末アドレスサーチは端末器21…群の上位アドレスに対
して順次グループポーリングを行って、割り込み端末器
からの下位アドレスの返信を実行するもので、グループ
間は優先付けされていない。従って、割り込み処理時間
として最大、グループ数のポーリング時間を必要とす
る。[SUMMARY OF THE INVENTION Incidentally terminal address search of the interrupt processing in the parent device 1 in the above conventional example performs sequential group polling to the upper address of the terminal device 2 1 ... groups, lower from the interrupt terminal unit It sends back the address, and there is no priority between groups. Therefore, the polling time of the maximum number of groups is required as the interrupt processing time.
一方定期ポーリングにおいて端末器21…の無返信があれ
ば親器１では伝送エラーか端末器異常と判断してエラー
処理を行っている。端末器21…としては、端末器特有の
処理を伝送処理をしながら実行し、本来、無返信となら
ないように構成されている。On the other hand, if there is no reply from the terminal device 2 1 ... In the regular polling, the master device 1 judges that it is a transmission error or an error in the terminal device and performs error processing. The terminal device 2 1 ... Is configured so as to execute the process peculiar to the terminal device while performing the transmission process, and not to return no reply.
従って、磁気カード３のカードリーダを付設した端末器
21のようにカードアクセスに高速処理を要するものは処
理構成が１チップマイクロコンピュータのような簡単な
回路構成とはならず、カード処理と伝送処理とを別々の
マイクロコンピュータで行う２チップ構成というように
複雑かつコスト高な回路を用いている。Therefore, a terminal device equipped with a card reader for the magnetic card 3
The one that requires high-speed processing for card access like 2 1 does not have a simple circuit configuration like a one-chip microcomputer, but is called a two-chip configuration in which card processing and transmission processing are performed by separate microcomputers. The circuit is complicated and expensive.
本発明は上述の問題点に鑑みて為されたもので、その目
的とするところは端末器特有の処理が複雑で且つ、端末
器特有の処理後伝送処理を割り込み要求によって行う端
末器の構成が１チップマイクロコンピュータのような簡
易なもので済む時分割多重伝送システムを提供するにあ
る。The present invention has been made in view of the above problems, and an object of the present invention is to complicate the processing peculiar to the terminal device and to configure the terminal device for performing the transmission processing after the processing peculiar to the terminal device by an interrupt request. An object is to provide a time division multiplex transmission system that can be as simple as a one-chip microcomputer.
［課題を解決するための手段］ 本発明は親器と複数の端末器とからなり、親器からサイ
クリックに端末器を順次呼び出すポーリングを行って各
端末器から順次返信される返信信号の処理を実行する処
理部と、ポーリングに対して一定回数未満無返信の端末
器がある状態で端末器群からの割り込み要求ないし緊急
処理要求があれば上記無返信端末器を優先的に処理する
処理部と、無返信の回数が一定回数以上となると当該端
末器の伝送異常と判断する処理部とを親器に設けた時分
割多重伝送システムにおいて、上記端末器では、端末器
特有の処理と、多重伝送処理とを独立した処理系で行
い、端末器特有の処理要求が端末器外部から入力される
と端末器の特有処理中も含めてある一定回数未満、親器
からのポーリングに対し、無返信とする処理部を設けて
いる。[Means for Solving the Problem] The present invention is composed of a master unit and a plurality of terminals, and processes a reply signal sequentially returned from each terminal by performing polling for sequentially calling the terminals cyclically from the master. And a processing unit that preferentially processes the non-reply terminal device if there is an interrupt request or an urgent processing request from the terminal device group in a state where there is a non-reply terminal device less than a certain number of times for polling. In a time division multiplex transmission system in which a master unit is provided with a processing unit that determines a transmission abnormality of the terminal device when the number of non-replies exceeds a certain number of times, in the terminal device, the processing unique to the terminal device and the multiplexing process are performed. The transmission processing is performed by an independent processing system, and when a terminal-specific processing request is input from outside the terminal, it does not reply to the polling from the master unit for less than a certain number of times, including during the terminal-specific processing. Processing Parts are provided.
［作用］ 而して本発明によれば、親器は各端末器を順次呼び出す
ポーリングを行った場合に、端末器の無返信を検知する
と、その無返信端末器を記憶し、その記憶した端末器の
無返信回数が規定回数未満の状態で、端末器群からの割
り込み要求乃至緊急処理要求があれば、無返信回数が一
定回数未満で記憶されている端末器に対して優先的に処
理を行うため当該端末器を呼び出すのである。[Operation] Therefore, according to the present invention, when the master device performs polling for sequentially calling each terminal device, if no reply is detected from the terminal device, the non-reply terminal device is stored and the stored terminal is stored. If there is an interrupt request or an urgent processing request from the terminal group when the number of no replies of the device is less than the specified number of times, the terminal device with the number of no replies less than a certain number of times is processed with priority. In order to do so, the terminal is called.
つまり優先処理により割り込みや緊急処理要求のレベル
が１段増えた形となり、システム対応が拡大できるので
ある。In other words, the priority processing increases the level of interrupts and urgent processing requests by one step, and system support can be expanded.
またポーリングに対して一定回数以上無返信となると当
該端末器の伝送異常と判断する処理部を親器には設けて
あるので、伝送異常による無返信も発見することができ
ることになる。Further, since the parent device is provided with a processing unit that determines that the terminal device has a transmission error when there is no response to the polling a certain number of times or more, it is possible to detect the non-response due to the transmission error.
一方端末器では、端末器特有処理中において親器からの
ポーリングに対して無返信とすることにより、端末器の
特有の処理に専念できて伝送処理と、端末器特有の処理
とを同時に並行して行う機能を必要とせず、処理系を１
つのマイクロコンピュータにより構成することができる
のである。On the other hand, in the terminal device, by not responding to the polling from the parent device during the terminal device-specific processing, it is possible to concentrate on the terminal device-specific processing, and transmission processing and terminal device-specific processing can be performed concurrently. The processing system is 1
It can be composed of two microcomputers.
［実施例］ 以下本発明を実施例のより説明する。[Examples] Hereinafter, the present invention will be described with reference to Examples.
実施例のシステム構成は第５図構成と同様な構成であっ
て、カードリーダのような端末器21は第１図に示すよう
な構成としている。The system configuration of Embodiment A fifth FIG configuration similar construction, the terminal device 2 1, such as a card reader is configured as shown in Figure 1.
つまり端末器21はカードリーダ（図示せず）に挿入され
る磁気カードからデータを高速に読み取って、読み取り
データを親器１へ返信する機能を持つものであり、当該
端末器特有の処理、つまりカードリーダに挿入された磁
気カードからデータを読み取って一時記憶するなどの処
理を行う端末特有処理部４と、親器１からの伝送信号の
受信、親器１への返信信号の送信や割り込み要求の信号
の送信などの伝送処理を行う伝送処理部4aとを１チップ
のマイクロコンピュータで構成して処理手段４と、カー
ドアクセスの如き特有処理要求のような外部入力や、カ
ードリーダに対する制御信号のような外部出力を端末特
有処理部4bとの間で仲介する外部入出力インターフェー
ス部５と、伝送線ｌを通じて親器１との間で信号の送受
を行うための伝送送受インターフェース部６とを備えて
いる。That terminal unit 2 1 reads the data from the magnetic card inserted into the card reader (not shown) at high speed, which has a function of returning the read data to the parent device 1, the terminal device-specific processing, That is, the terminal-specific processing unit 4 that performs processing such as reading data from the magnetic card inserted in the card reader and temporarily storing the data, reception of a transmission signal from the master device 1, transmission of a reply signal to the master device 1, and interruption. A transmission processing unit 4a that performs transmission processing such as transmission of a request signal is configured by a one-chip microcomputer, and processing means 4, external input such as a specific processing request such as card access, and a control signal to a card reader. A transmission / reception for transmitting / receiving a signal to / from an external input / output interface unit 5 which mediates an external output like the above with a terminal-specific processing unit 4b and a master device 1 through a transmission line l. The receiving interface unit 6 is provided.
而して、通常時においては親器１からの伝送信号によっ
て定期ポーリングが行われ、順次各端末器21…を呼び出
して返信信号を返信させる。And Thus, in a normal heartbeat polling is performed by the transmission signal from the main unit 1, thereby return the reply signal to call successively each terminal unit 2 1 ....
この時親器１は無返信の端末器があるのかどうかを検定
して、無返信の端末器があれば当該端末器の無返信回数
が規定回数未満なのかどうかを判定し、当該端末器の無
返信回数が規定回数未満であれば、当該端末器のアドレ
スを記憶するとともに、次の端末器群からの割り込み要
求や緊急処理要求であれば、優先的にアクセスして処理
を行う優先付け処理対象として記憶する。もし上記の無
返信回数が規定回数以上であれば端末器異常と判定して
異常に対する処理を行う。At this time, the master device 1 verifies whether there is a non-reply terminal device, and if there is a non-reply terminal device, determines whether or not the number of non-reply times of the terminal device is less than the specified number of times, and If the number of no replies is less than the specified number of times, the address of the terminal is stored, and if there is an interrupt request or emergency processing request from the next group of terminals, priority processing is performed by preferentially accessing and processing. Remember as a target. If the number of no replies is equal to or greater than the specified number, it is determined that the terminal device is abnormal, and the process for the abnormality is performed.
さて上記定期ポーリング中に割り込み要求があれば、優
先付け処理対象のアドレスの有無を判定して、優先付け
処理対象のアドレスがなければ通常の割り込み処理、つ
まり上位アドレスによるポーリングによって割り込み要
求を行った端末器のアドレスサーチを行って、当該アド
レスの端末器との間のデータの授受を行う。If there is an interrupt request during the above-mentioned regular polling, it is determined whether there is an address to be prioritized, and if there is no address to be prioritized, normal interrupt processing is performed, that is, an interrupt request is made by polling with an upper address. The terminal device address search is performed, and data is exchanged with the terminal device at the address.
一方優先付け処理対象のアドレスが有れば当該アドレス
の端末器、例えば21を呼び出して、データの授受を行
う。つまり直接ポーリング処理を行い、この処理後記憶
している優先付け処理にかかるアドレスの記憶消去を行
って元の通常処理に戻るのである。Meanwhile prioritization terminal unit of the address if the address to be processed there, for example, by calling the 2 1, and exchanges data. In other words, the direct polling process is performed, and after this process, the stored address of the prioritizing process is erased and the original normal process is returned to.
端末器21では第３図に示すように通常の定期ポーリング
中には親器１の呼び出しに応じて返信信号を返信する通
常伝送処理を行っている。そしてカードリーダアクセス
などの外部からの特有処理要求であれば、伝送処理部は
外部入出力インターフェース部５からの処理停止信号を
受けて、親器１からの呼び出しに応じた返信信号の送信
などの伝送処理部4aによる処理を停止し、端末特有処理
部4bによりカードリーダのデータ読み取り処理を行う。
この読み取り処理が終了すれば伝送処理部4aを動作させ
て割り込み要求の信号を送信するものである。During normal periodic polling as shown in FIG. 3 in the terminal unit 2 1 is performed normal transmission processing of transmitting a reply signal in response to the call the parent device 1. Then, in the case of a special processing request from the outside such as card reader access, the transmission processing unit receives a processing stop signal from the external input / output interface unit 5 and transmits a reply signal in response to a call from the master unit 1. The processing by the transmission processing unit 4a is stopped and the data reading process of the card reader is performed by the terminal-specific processing unit 4b.
When this reading process is completed, the transmission processing unit 4a is operated to transmit an interrupt request signal.
この割り込みの信号送信であれば上述の優先付け処理に
より当該端末器21のアドレスに対する直接ポーリングが
為されることになり、当該端末器21は割り込み応答とし
て読み取ったデータを親器１へ返信する。It will be directly polling of the terminal units 2 1 address is performed by the above-described prioritization process if the signal transmission of the interrupt, the terminal unit 2 1 sends back the data read as an interrupt in response to the parent device 1 To do.
［発明の効果］ 本発明は親器と複数の端末器とからなり、親器からサイ
クリックに端末器を順次呼び出すポーリングを行って各
端末器から順次返信される返信信号の処理を実行する処
理部と、ポーリングに対して一定回数未満無返信の端末
器がある状態で端末器群からのり込み要求ないし緊急処
理要求があれば上記無返信端末器を優先的に処理する処
理部と、無返信の回数が一定回数以上となると当該端末
器の伝送異常と判断する処理部とを親器に設けてあるか
ら、優先処理により割り込みや緊急処理要求のレベルが
１段増えた形となり、そのためシステム対応が拡大で
き、また一定回数以上無返信となると当該端末器の伝送
異常と判断する処理部を親器には設けてあるので、伝送
異常のよる無返信も発見することができるという効果が
ある。EFFECTS OF THE INVENTION The present invention is composed of a master unit and a plurality of terminals, and performs a process of processing a reply signal that is sequentially returned from each terminal unit by performing polling that sequentially calls the terminals from the master unit. Section and a processing section that preferentially processes the above-mentioned non-reply terminal if there is a request for squeeze-in or an urgent processing request from the terminal group when there is a non-reply terminal for a certain number of times with respect to polling, and no reply When the number of times exceeds a certain number of times, the main unit is provided with a processing unit that determines that there is a transmission error in the terminal unit, so the level of interrupts and emergency processing requests is increased by one step due to priority processing, so system support The parent device is provided with a processing unit that determines that there is a transmission error of the terminal device when there are no replies a certain number of times. .
また端末器では、端末器特有の処理と、多重伝送処理と
を独立した処理系で行い、端末器特有処理要求が端末器
外部から入力されると端末器特有処理中も含めてある一
定回数未満、親器からのポーリングに対し、無返信とす
る処理部を端末器に設けてあるので、端末器の特有処理
中においては親器からのポーリングに対して無返信とす
ることにより、端末器の特有の処理に専念できて伝送処
理と、端末器特有の処理とを同時に並行して行う機能を
必要とせず、処理系を１つのマイクロコンピュータで構
成することができるという効果がある。In the terminal, the processing unique to the terminal and the multiplex transmission processing are performed by independent processing systems, and when a terminal-specific processing request is input from outside the terminal, including during the terminal-specific processing less than a certain number of times. Since the terminal unit is provided with a processing unit that does not respond to polling from the master unit, by not responding to polling from the master unit during special processing of the terminal unit, This has the effect that the processing system can be configured by one microcomputer without being required to have the function of being able to concentrate on specific processing and performing transmission processing and terminal-specific processing simultaneously in parallel.
第１図は本発明の実施例の構成図、第２図は同上の親器
のフローチャート、第３図は同上の端末器のフローチャ
ート、第４図は時分割多重伝送システムの基本的構成
図、第５図は同上の伝送信号のフォーマット説明図であ
る。 １は親器、21は端末器、４は処理手段、4aは伝送処理
部、4bは端末特有処理部、５は外部入出力インターフェ
ース部、６は伝送送受インターフェース部である。FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flow chart of the parent device in the same, FIG. 3 is a flow chart of the terminal device in the same, FIG. 4 is a basic configuration diagram of a time division multiplex transmission system, FIG. 5 is a diagram for explaining the format of the transmission signal of the above. 1 master set, 2 1 terminal device, the processing means 4, 4a transmission processing unit, 4b terminal-specific processing unit, 5 an external output interface unit, and 6 a transmitting transceiver interface.
Claims (1)
サイクリックに端末器を順次び出すポーリングを行って
各端末器から順次返信される返信信号の処理を実行する
処理部と、ポーリングに対して一定回数未満無返信の端
末器がある状態で端末器群からの割り込み要求ないし緊
急処理要求があれば上記無返信端末器を優先的に処理す
る処理部と、無返信の回数が一定回数以上となると当該
端末器の伝送異常と判断する処理部とを親器に設けた時
分割多重伝送システムにおいて、上記端末器では、端末
器特有の処理と、多重伝送処理とを独立した処理系で行
い、端末器特有処理中も含めてある一定回数未満、親器
からのポーリングに対し、無返信とする処理部を端末器
に設けたことを特徴とする時分割多重伝送システム。1. A processing unit comprising a master unit and a plurality of terminals, and a processing unit for performing a polling process for cyclically projecting the terminals from the master unit and processing a reply signal sequentially returned from each terminal unit. If there is an unreplyed terminal device less than a certain number of times for polling, if there is an interrupt request or an urgent processing request from the terminal group, a processing unit that preferentially processes the above unreplyed terminal device, and the number of no reply In a time division multiplex transmission system in which a master unit is provided with a processing unit that determines that the terminal device has a transmission error when the number of times exceeds a certain number of times, in the above terminal device, the processing unique to the terminal device and the multiplex transmission processing are independent. A time-division multiplex transmission system characterized in that the terminal device is provided with a processing unit which does not reply to polling from the master device less than a certain number of times, including the processing unique to the terminal device, during the processing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297073A JPH0752882B2 (en) | 1989-11-15 | 1989-11-15 | Time division multiplex transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297073A JPH0752882B2 (en) | 1989-11-15 | 1989-11-15 | Time division multiplex transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03158035A JPH03158035A (en) | 1991-07-08 |
| JPH0752882B2 true JPH0752882B2 (en) | 1995-06-05 |
Family
ID=17841859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297073A Expired - Fee Related JPH0752882B2 (en) | 1989-11-15 | 1989-11-15 | Time division multiplex transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752882B2 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721140A (en) * | 1980-07-15 | 1982-02-03 | Ricoh Co Ltd | Communication system |
| JPS57141158A (en) * | 1981-02-26 | 1982-09-01 | Fujitsu Ltd | Communication control system |
| JPS5945742A (en) * | 1982-09-08 | 1984-03-14 | Omron Tateisi Electronics Co | Polling transmission system |
| JPS6159941A (en) * | 1984-08-30 | 1986-03-27 | Fujitsu Ltd | Terminal control system of multi-drop connection |
| JPS62206942A (en) * | 1986-03-06 | 1987-09-11 | Toshiba Corp | Data transmission system |
| JPS63278439A (en) * | 1987-05-08 | 1988-11-16 | Matsushita Electric Ind Co Ltd | Communication controller for home bus system |
| JPH01143537A (en) * | 1987-11-30 | 1989-06-06 | Furukawa Electric Co Ltd:The | Multiplex transmission system |
| JPH01256244A (en) * | 1988-04-05 | 1989-10-12 | Fujitsu Ltd | Fault processing system in multi-drop line |
-
1989
- 1989-11-15 JP JP1297073A patent/JPH0752882B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721140A (en) * | 1980-07-15 | 1982-02-03 | Ricoh Co Ltd | Communication system |
| JPS57141158A (en) * | 1981-02-26 | 1982-09-01 | Fujitsu Ltd | Communication control system |
| JPS5945742A (en) * | 1982-09-08 | 1984-03-14 | Omron Tateisi Electronics Co | Polling transmission system |
| JPS6159941A (en) * | 1984-08-30 | 1986-03-27 | Fujitsu Ltd | Terminal control system of multi-drop connection |
| JPS62206942A (en) * | 1986-03-06 | 1987-09-11 | Toshiba Corp | Data transmission system |
| JPS63278439A (en) * | 1987-05-08 | 1988-11-16 | Matsushita Electric Ind Co Ltd | Communication controller for home bus system |
| JPH01143537A (en) * | 1987-11-30 | 1989-06-06 | Furukawa Electric Co Ltd:The | Multiplex transmission system |
| JPH01256244A (en) * | 1988-04-05 | 1989-10-12 | Fujitsu Ltd | Fault processing system in multi-drop line |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03158035A (en) | 1991-07-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |