JPS59181853A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS59181853A
JPS59181853A JP58055925A JP5592583A JPS59181853A JP S59181853 A JPS59181853 A JP S59181853A JP 58055925 A JP58055925 A JP 58055925A JP 5592583 A JP5592583 A JP 5592583A JP S59181853 A JPS59181853 A JP S59181853A
Authority
JP
Japan
Prior art keywords
command
data
data processing
processing device
communication control
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.)
Granted
Application number
JP58055925A
Other languages
Japanese (ja)
Other versions
JPH0345945B2 (en
Inventor
Masahito Hihara
日原 正仁
Mikio Sato
佐藤 幹雄
Chikako Taniguchi
谷口 千佳子
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP58055925A priority Critical patent/JPS59181853A/en
Publication of JPS59181853A publication Critical patent/JPS59181853A/en
Publication of JPH0345945B2 publication Critical patent/JPH0345945B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/10Program control for peripheral devices
    • G06F13/12Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor
    • G06F13/124Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor where hardware is a sequential transfer control unit, e.g. microprocessor, peripheral processor or state-machine

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Small-Scale Networks (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer And Data Communications (AREA)

Abstract

PURPOSE:To improve the processing ability by allowing a communication controller to give a certain degree of decision so as to decrease the interruption to a data processor (CPU) in performing data communication by means of polling/ selecting from a center provided with the CPU and the communication controller. CONSTITUTION:A command of a processing section 51 of the CPU is transmitted to a terminal device through a line via a channel section 54 and the communication controller 6. The terminal device performs required response. That is, the data is transmitted or not responded to the polling and the propriety of receiving is responded to the selecting. The command from the processing section 51 performs the command of polling/selecting via a command storage section 52. If the response from the terminal device is negative response to the commands, the information is received from the communication control as a status and the next command is read from the command storage section 52 and executed without giving interruption to the processing section 51.

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システムに関し、特にデータ通信シ
ステムのセンター装置におけるデータ処理装置と通信制
御装置との間の制御方式に関する。
TECHNICAL FIELD OF THE INVENTION The present invention relates to a data transmission system, and more particularly to a control method between a data processing device and a communication control device in a center device of a data communication system.

従来技術と問題点 −・般に、ポーリング、セレクチング接続方式を採るデ
ータ通信システムは情報の発生源である子局側(端末)
と、情報処理および接続制御を行なうセンタ側から構成
される。第1図により説明すると、センタ側2はデータ
処理装置5と通信制御装置6及びモデム7からなり、子
局側3または4は端末装置10とモデム8または端末装
置11とモデム9からなっている。センタ側と子局側は
回線1によって接続され、そして本例では子局側は分岐
装置により複数個接続されている。
Conventional technology and problems - In general, data communication systems that use polling and selecting connection methods are connected to the slave station (terminal), which is the source of information.
and a center side that performs information processing and connection control. To explain with reference to FIG. 1, the center side 2 consists of a data processing device 5, a communication control device 6, and a modem 7, and the slave station side 3 or 4 consists of a terminal device 10 and a modem 8 or a terminal device 11 and a modem 9. . The center side and the slave stations are connected by a line 1, and in this example, a plurality of slave stations are connected by branching devices.

前記システム構成において、センタ側は子局側の状態を
確認するためポーリング起動信号またはセレクチング起
動信号を送信し、子局側は自局宛の起動信号を受信した
ら何らかの応答を送信しなげればならない。即ち、受信
した信号がポーリング起動信号の場合には送信データが
有ればそのデータを送信し、送信データが無い場合はデ
ータ無しの応答を送信する。また受信した信号がセレク
チング起動信号の場合には、センタ側からのデータの受
信が可能か否かの応答を送信しなければならない。
In the above system configuration, the center side sends a polling activation signal or a selection activation signal to check the status of the slave station, and the slave station must send some kind of response when it receives the activation signal addressed to itself. . That is, when the received signal is a polling activation signal, if there is transmission data, that data is transmitted, and if there is no transmission data, a response with no data is transmitted. Furthermore, if the received signal is a selection activation signal, a response must be sent to determine whether data can be received from the center side.

上記の場合、従来は第2図に示す如く、センタ側におい
てデータ処理装置5ば送信データの有無を判定し、送信
データかあればセレクチング起動信号を送信しく図のブ
ロック「別途送信指令指定」がそれ)、送信データが無
い場合はポーリング起動信号送信のため通信制御装置6
へ送信指令を発信する。図の送信指令指定、送信CCW
続出し、送信指令発行の各ブロックがそれを示す。通信
制御装置6は端末装置へポーリング起動信号を送信する
とデータ処理装置へ送信完了を通知する。本通知により
チャネル部は指令連鎖の判定を行い、指令連鎖があると
受信指令を通信制御装置へ発信するようになっている。
In the above case, conventionally, as shown in Figure 2, the data processing device 5 on the center side determines whether or not there is transmission data, and if there is transmission data, it transmits a selection activation signal. ), if there is no transmission data, the communication control device 6 sends a polling start signal.
Sends a transmission command to. Transmission command specification, transmission CCW in the figure
This is shown in each block of transmission command issuance. When the communication control device 6 transmits the polling activation signal to the terminal device, it notifies the data processing device of the completion of the transmission. Based on this notification, the channel unit determines the chain of commands, and if there is a chain of commands, it sends a reception command to the communication control device.

図のブロックCCW続出し、受信指令発行、がそれを示
す。図示しない端末装置はポーリング起動信号を受信す
ると送信データをもっているか否かの判断をし、送信デ
ータが存在していればデータをセンタ側へ送信し、送信
するデータを持っていない場合はセンタ側へ送信データ
を持っていないことを表わす応答文字を送信する。通信
制御装置は上記受信指令により、端末装置からのデータ
又は応答文字を受信するとデータ処理装置へこれらを転
送して該データ処理装置へ割込みを起す。本割込みに対
してデータ処理装置は受信した内容がデータか、応答文
字かの判定を行う。データであると受信処理を行うが、
応答文字であると再度送信指令を通信制御装置へ発信す
ることになる。
This is shown in the block CCW successive block CCW and reception command issue in the figure. When a terminal device (not shown) receives the polling activation signal, it determines whether or not it has data to send. If it has data to send, it sends the data to the center, and if it does not have data to send, it sends it to the center. Sends a response character indicating that it has no data to send. When the communication control device receives data or response characters from the terminal device according to the reception command, it transfers them to the data processing device and causes an interrupt to the data processing device. In response to this interrupt, the data processing device determines whether the received content is data or a response character. If it is data, reception processing is performed, but
If it is a response character, a transmission command will be sent to the communication control device again.

上記ポーリング起動信号送信時の動作を考えると、端末
装置に対してポーリングを送信した場合、bl、+4末
装置にセンタへのデータか存在しない場合でもデータ処
理装置へ割込みか発生することとなり、それによりデー
タ処理装置は端末装置からの情報の解析、送信指令発信
などを行なわねばならずデータ処理装置の負荷が増大す
る。
Considering the above operation when sending the polling start signal, if polling is sent to the terminal device, an interrupt will occur to the data processing device even if there is no data to the center in the bl, +4 terminal device, and As a result, the data processing device must analyze information from the terminal device, issue transmission commands, etc., and the load on the data processing device increases.

発明の目的 本発明は上記の点を改善し、通信制御装置にある程度の
判断をさせてデータ処理装置への割込みを減少し、該処
理装置の負荷を軽減しようとするものである。
OBJECTS OF THE INVENTION The present invention aims to improve the above-mentioned points and reduce the number of interruptions to a data processing device by allowing a communication control device to make certain judgments, thereby reducing the load on the processing device.

発明の構成 本発明はデータ処理装置および通信制御装置を備えるセ
ンタ装置からのポーリング/セレク、チング信号により
接続端末を選択してデータ伝送を行なうデータ伝送シス
テムにおいて前記データ処理装置の指令格納手段へ、ポ
ーリング信号を送信するための送信指令と選択端末から
の応答を受信するための受信指令とチャネル内とび越し
指令を、該送信指令が該受信指令へ、該受信指令が該チ
ャネル内とび越し指令へ、該チャネル内とび越し指令が
該送信指令へそれぞれ連鎖するようにして格納するとと
もに、データ処理装置に送信データが発生した際は前記
チャネル内とび越し指令をノーオペレーション指令へ変
換して指令連鎖を中止し、前記通信制御装置からの割込
みが発生する様構成し、さらに前記通信制御装置は前記
受信指令に対して端末装置からデータがない事を示す否
定応答を受信した際は前記指令連鎖を継続できるステー
タス情報をデータ処理装置へ通知し、前記端末装置から
データを受信した際は前記指令連鎖を中止するステータ
ス情報を前記データ処理装置へ通知するよう構成し−C
なる事を特徴とするが、次に実施例を参照しながらこれ
を詳細に説明する。
Structure of the Invention The present invention provides a data transmission system in which a connected terminal is selected and data is transmitted based on a polling/select signal from a center device including a data processing device and a communication control device, and a command storage means of the data processing device is provided with: A transmission command for transmitting a polling signal, a reception command for receiving a response from a selected terminal, and an intra-channel jump command, where the transmission command is sent to the reception command, and the reception command is sent to the channel jump command. , the intra-channel jump commands are stored in a chain manner with the transmission command, and when transmission data is generated in the data processing device, the intra-channel jump command is converted to a no-operation command to complete the command chain. When the communication control device receives a negative response from the terminal device indicating that there is no data in response to the received command, the communication control device continues the command chain. -C
Next, this will be explained in detail with reference to embodiments.

発明の実施例 第3図は本発明に係るセンタ側装置の構成を示すブロッ
ク図である。この図において、6は通信制御装置、5は
データ処理装置で、これらは第1図のそれに対応する。
Embodiment of the Invention FIG. 3 is a block diagram showing the configuration of a center-side device according to the invention. In this figure, 6 is a communication control device, and 5 is a data processing device, which correspond to those in FIG.

データ処理装置5は処理部51、指令格納部52、デー
タ格納部53、チャネル部54を備え、通信制御装置6
は処理部61、回線対応部62を備える。本発明は特に
このチャネル部54と処理部61との間の制御方式に係
る。第3図(b)は指令格納部52の内容を示す。第4
図は第3図の実施例の動作をフロー図で示したものであ
る。以下、第4図にもとづいて、第3回の本発明の実施
例の動作を説明する。
The data processing device 5 includes a processing section 51, a command storage section 52, a data storage section 53, a channel section 54, and a communication control device 6.
includes a processing section 61 and a line correspondence section 62. The present invention particularly relates to the control system between the channel section 54 and the processing section 61. FIG. 3(b) shows the contents of the command storage section 52. Fourth
The figure shows the operation of the embodiment of FIG. 3 in a flow diagram. The operation of the third embodiment of the present invention will be described below with reference to FIG.

データ処理装置5はその指令格納部52に、ポーリング
信号(前述のポーリング起動信号)を送信する送信指令
を有する送信CCW (C)IANNEL  COMM
AND  WORD)がポーリング信号に対するデータ
又は応答を受信する受信指令を有する次の受信CCWへ
指令連鎖し、該受信CCWは送信CCWを指定したチャ
ネル内とび越し指令(TRANSFERINC)IAN
NEL :略してTIC)を有する次のTICCCWへ
指令連鎖、更に該TIC’CCWば」二記送信CCWへ
指令連鎖するよう構成したCCW群を設ける。データ処
理装置5は通信制御装置6の起動時に端末装置に対する
送信データの有無を判断し、送信データが存在しない場
合は、上記送信CCWを指令アドレスに指定し、通信制
御装置6を起動する。通信制御装置6は送信指令に基づ
きポーリング信号を端末装置へ送信し、送信が終了する
と送信終了のステータス(チャネル終了、入出力装置終
了)をチャネル部54へ通知し、送信指令の実行を終了
する。上記ステータスによりチャネル部54では該ステ
ータスは正常ステータスか否か、それかYESなら指令
連鎖有りか否かか判断され、連鎖ありなら(本例では連
鎖あり)次のCCWを実行する事になる。チャネル部5
4は次のCCWで指定された受信指令により通信制御装
置6を起動する。
The data processing device 5 stores in its command storage unit 52 a transmission CCW (C) IANNEL COMM that has a transmission command for transmitting a polling signal (the above-mentioned polling activation signal).
AND WORD) command chain to the next receiving CCW with a receive command to receive data or responses to the polling signal, which receives the intra-channel jump command (TRANSFERINC) IAN that specified the transmitting CCW.
A CCW group is provided which is configured to chain a command to the next TICCCW having a NEL (abbreviated as TIC), and further chain a command to the second transmission CCW having the TIC'CCW. When the communication control device 6 is activated, the data processing device 5 determines whether there is data to be transmitted to the terminal device. If there is no data to be transmitted, the data processing device 5 specifies the transmission CCW as a command address and activates the communication control device 6. The communication control device 6 transmits a polling signal to the terminal device based on the transmission command, and when the transmission ends, notifies the channel unit 54 of the transmission end status (channel end, input/output device end), and ends the execution of the transmission command. . Based on the above status, the channel unit 54 determines whether the status is normal or not, and if YES, whether there is a chain of commands, and if there is a chain (in this example, there is a chain), the next CCW will be executed. Channel part 5
4 activates the communication control device 6 according to the reception command specified by the next CCW.

通信制御装置6は、受信指令実行中、端末装置からの情
報を監視する。受信した情報がデータであると指令連鎖
を抑止するため装置例外情報をイ」加したステータス(
チャネル終了、入出力装置終了、装置例外)をチャネル
部54へ通知し、受信指令の実行を終了する。上記ステ
ータスにより一連の指令連鎖は抑止され、データ処理装
置6へ割込みが発生する。また受信した情報がデータ無
しを示ず応答であると通常のステータス(チャネル終了
、入出力装置終了)をチャネル部54へ通知する。上記
ステータスにより指令連鎖は続行され、次のCCWを実
行する事になる。ここで受信CCWの次のCCWがTI
CCCWであると次に送信CCWが実行される事になる
。第4図ではチャネル部54の下端の■から上端の■へ
戻り、次の送信CCWで再度端末装置に対するポーリン
グ信号の送信が実行される。送信CCWは受信CCWへ
指令連鎖されているので、送信終了後は再度受信CCW
の受信指令により端末装置からの情報を監視する事にな
る。こうして通信制御装置6からチャネル部54へ送ら
れるステータスが正常であり、端末装置からの応答はデ
ータなし応答であると送信CCW、受信CCWの送出が
繰り返されてポーリングが続行し、この間データ処理装
置5への割込み発生はない。割込みが生じるのは、正常
ステータスでない及び指令連鎖なしの場合だけで) ある。
The communication control device 6 monitors information from the terminal device while executing the reception command. If the received information is data, the status (with device exception information added) is added to prevent the command chain.
(end of channel, end of input/output device, device exception) is notified to the channel unit 54, and execution of the reception command is ended. A series of command chains is inhibited by the above status, and an interrupt is generated to the data processing device 6. Further, if the received information does not indicate no data and is a response, the normal status (channel end, input/output device end) is notified to the channel unit 54. Based on the above status, the command chain will continue and the next CCW will be executed. Here, the CCW next to the received CCW is TI
If it is CCCW, the transmission CCW will be executed next. In FIG. 4, the channel section 54 returns from ■ at the lower end to ■ at the upper end, and the polling signal is transmitted to the terminal device again in the next transmission CCW. Since the sending CCW is command chained to the receiving CCW, after the sending is completed, the receiving CCW is sent again.
The information from the terminal device will be monitored based on the receiving command. In this way, if the status sent from the communication control device 6 to the channel unit 54 is normal and the response from the terminal device is a no-data response, the transmission CCW and the reception CCW are repeated and polling continues, and during this time the data processing device No interrupt occurs to 5. Interrupts occur only when the status is not normal and there is no chain of command).

データ処理装置5に端末装置に対する送信データが発生
した場合には、指令格納部52の’I” I CCCW
をノーオペレーション(NOP)指令に置き替える事に
より指令連鎖は抑止され割込みか発生ずるのでデータ処
理装置はデータ送信のためのセレクチング信号を送信す
る事ができる。
When transmission data to a terminal device is generated in the data processing device 5, 'I' I CCCW of the command storage unit 52 is generated.
By replacing the command with a no-operation (NOP) command, the chain of commands is suppressed and an interrupt is generated, so that the data processing device can transmit a selecting signal for data transmission.

発明の効果 以上本発明によれば、端末装置からデータ無しを示す否
定応答がきたときはデータ処理装置へ割込む事なくチャ
ネル部および通信制御装置で再度ポーリング信号を送信
し、また端末装置に送信するデータが発生した時にはデ
ータ処理装置が指令領域の内容をl!i:替えることに
より割込みが発生ずるので、従来のような送信指令およ
び受信指令の再発信をしなくてすみ、指令発行および割
込み処理の負荷を軽減することができ、データ処理装置
の処理能力および処理効率の向上を図ることができる。
Effects of the Invention According to the present invention, when a negative response indicating that there is no data is received from the terminal device, the channel unit and the communication control device transmit the polling signal again without interrupting the data processing device, and then send it again to the terminal device. When data is generated, the data processing device converts the contents of the command area into l! Since an interrupt is generated by changing i:, there is no need to re-send the transmit command and receive command as in the past, and the load on command issuance and interrupt processing can be reduced. Processing efficiency can be improved.

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

第1図はデータ伝送システムの構成を示すブロツク図、
第2図は従来のポーリング要領を説明するフロー図、第
3図は本発明の実施例を示すブロック図、第4図は本発
明のポーリング要領を説明するフロー図である。 図面で5はデータ処理装置、6は通信制御装置、3.4
は端末装置、52ば指令格納部である。 出願人 冨士通株式会社
Figure 1 is a block diagram showing the configuration of the data transmission system.
FIG. 2 is a flowchart explaining the conventional polling procedure, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a flowchart explaining the polling procedure of the present invention. In the drawing, 5 is a data processing device, 6 is a communication control device, 3.4
52 is a terminal device, and 52 is a command storage unit. Applicant Fujitsu Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] データ処理装置および通信制御装置を備えるセンタ装置
からのポーリング/セレクチング信号により接続端末を
選択してデータ伝送を行なうデータ伝送システムにおい
て、前記データ処理装置の指令格納手段へ、ポーリング
信号を送信するための送信指令と選択り(1^末からの
応答を受信するための受信指令とチャネル内とび越し指
令を、該送信指令が該受信指令へ、該受信指令が該チャ
ネル内とび越し指令へ、該チャネル内とび越し指令が該
送信指令へそれぞれ連鎖するようにして格納するととも
に、データ処理装置に送信データか発生した際は前記チ
ャネル内とび越し指令をノーオペレーション指令へ変換
して指令連鎖を中止し、前記通信制御装置からの割込み
が発生ずる様構成し、さらに前記通信制御装置は前記受
信指令に対して端末装置からデータがない事を示す否定
応答を受信した際は前記指令連鎖を継続できるステータ
ス情報をデータ処理装置へ通知し、前記端末装置からデ
ータを受信した際は前記指令連鎖を中止するステータス
情報を前記データ処理装置へ通知するよう構成してなる
事を特徴とするデータ伝送システム。
In a data transmission system in which a connected terminal is selected and data is transmitted by a polling/selecting signal from a center device including a data processing device and a communication control device, a method for transmitting a polling signal to a command storage means of the data processing device is provided. Send command and selection (1^) A receive command and an intra-channel jump command to receive a response from the end, the send command goes to the receive command, the receive command goes to the intra-channel jump command, the channel storing the in-channel skip commands in a chained manner with the respective transmission commands, and when transmission data is generated in the data processing device, converts the in-channel jump command into a no-operation command and cancels the command chain; The communication control device is configured to generate an interrupt from the communication control device, and further includes status information that allows the communication control device to continue the command chain when it receives a negative response from the terminal device indicating that there is no data in response to the received command. A data transmission system characterized in that the data transmission system is configured to notify a data processing device of the command chain, and to notify the data processing device of status information for canceling the command chain when data is received from the terminal device.
JP58055925A 1983-03-31 1983-03-31 Data transmission system Granted JPS59181853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58055925A JPS59181853A (en) 1983-03-31 1983-03-31 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58055925A JPS59181853A (en) 1983-03-31 1983-03-31 Data transmission system

Publications (2)

Publication Number Publication Date
JPS59181853A true JPS59181853A (en) 1984-10-16
JPH0345945B2 JPH0345945B2 (en) 1991-07-12

Family

ID=13012675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58055925A Granted JPS59181853A (en) 1983-03-31 1983-03-31 Data transmission system

Country Status (1)

Country Link
JP (1) JPS59181853A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276896A (en) * 1990-06-11 1994-01-04 Unisys Corporation Apparatus for implementing data communications between terminal devices and user programs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652949A (en) * 1979-10-05 1981-05-12 Hitachi Ltd Interruption control method
JPS57141158A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Communication control system
JPS57212849A (en) * 1981-06-24 1982-12-27 Omron Tateisi Electronics Co Polling transmission system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652949A (en) * 1979-10-05 1981-05-12 Hitachi Ltd Interruption control method
JPS57141158A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Communication control system
JPS57212849A (en) * 1981-06-24 1982-12-27 Omron Tateisi Electronics Co Polling transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276896A (en) * 1990-06-11 1994-01-04 Unisys Corporation Apparatus for implementing data communications between terminal devices and user programs

Also Published As

Publication number Publication date
JPH0345945B2 (en) 1991-07-12

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