JP3099487B2 - Non-line / optical communication equipment for transmission terminals - Google Patents
Non-line / optical communication equipment for transmission terminalsInfo
- Publication number
- JP3099487B2 JP3099487B2 JP04009562A JP956292A JP3099487B2 JP 3099487 B2 JP3099487 B2 JP 3099487B2 JP 04009562 A JP04009562 A JP 04009562A JP 956292 A JP956292 A JP 956292A JP 3099487 B2 JP3099487 B2 JP 3099487B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- led
- transmission terminal
- terminal
- address
- 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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- Small-Scale Networks (AREA)
- Optical Communication System (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はＦＡ分野などに用いら
れ、伝送回線に伝送端末をマルチドロップ接続してなる
回線伝送システムにおいて、布線後の前記伝送端末への
アドレス設定などのために前記伝送回線を介することな
く外部と光による交信を行う伝送端末の光交信装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the field of FA and the like. The present invention relates to an optical communication device of a transmission terminal that performs optical communication with the outside without passing through a transmission line.
【０００２】なお以下各図において同一の符号は同一も
しくは相当部分を示す。[0002] In the drawings, the same reference numerals indicate the same or corresponding parts.
【０００３】[0003]
【従来の技術】図４はマルチドロップ接続の一般的な回
線伝送システムの構成例を示す。同図において８は伝送
回線、１０はこの伝送回線８にマルチドロップ方式で接
続された伝送端末、２１はこのシステムの伝送を制御す
る伝送センタである。また２２（２２−１，２２−２，
…）はこの伝送端末１０に対する入出力手段で、２２−
１は表示灯，２２−２はスイッチである。2. Description of the Related Art FIG. 4 shows an example of the configuration of a general multi-drop connection line transmission system. In FIG. 1, reference numeral 8 denotes a transmission line, 10 denotes a transmission terminal connected to the transmission line 8 in a multi-drop manner, and 21 denotes a transmission center for controlling transmission of the system. 22 (22-1, 22-2,
..) Are input / output means for the transmission terminal 10.
1 is an indicator light, 22-2 is a switch.
【０００４】次に図５は伝送端末１０に対する従来のア
ドレス設定方式の１例を示す構成図である。同図におい
て５は伝送端末１０内の制御の主体となる制御回路でマ
イクロプロセッサ等からなる。６，７は夫々伝送回線８
に対する制御回路５の伝送の受信，送信のインタフェー
スとなるレシーバ，ドライバ、２２−３は制御回路５へ
の入力手段２２としてのアドレス設定用のＤＩＰスイッ
チである。[0005] FIG. 5 is a block diagram showing an example of a conventional address setting method for the transmission terminal 10. In FIG. 1, reference numeral 5 denotes a control circuit which is a main control unit in the transmission terminal 10 and comprises a microprocessor or the like. 6 and 7 are transmission lines 8 respectively
And a driver 22-3 serving as an interface for receiving and transmitting the transmission of the control circuit 5 to the control circuit 5, and a DIP switch 22-3 for setting an address as input means 22 to the control circuit 5.
【０００５】また図６は従来のアドレス設定方式の他の
例を示す構成図で、同図（Ａ）は伝送端末の構成を、同
図（Ｂ）はアドレス設定時の伝送システムの構成を夫々
示す。ここで２４は制御回路５に負荷されたＥＥＰＲＯ
Ｍ（つまり電気的消去可能なＰＲＯＭ）、また同図
（Ｂ）において９は伝送回線８上に伝送センタ２１の代
りに設けられるアドレス設定用の設定器である。FIG. 6 is a block diagram showing another example of the conventional address setting system. FIG. 6A shows the configuration of a transmission terminal, and FIG. 6B shows the configuration of a transmission system at the time of address setting. Show. Here, 24 is the EEPRO loaded on the control circuit 5.
M (that is, an electrically erasable PROM), and 9 in FIG. 3B, an address setting device provided on the transmission line 8 instead of the transmission center 21.
【０００６】即ち図６では同図（Ａ）に示すように伝送
端末１０の内部にＥＥＰＲＯＭ２４を設け、伝送機能の
一つにアドレス設定交信を加えて、同図（Ｂ）に示すよ
うに伝送センタ２１または設定器９と伝送端末が１：１
となるように配線し、伝送端末１０のアドレスが伝送シ
ステムにおいて他の伝送端末と重複しないように、伝送
端末１０の制御回路５を通してＥＥＰＲＯＭ２４へアド
レスを設定していた。これは伝送センタ２１あるいは設
定器９と伝送端末１０を複数設置し、設定交信を行う
と、マルチドロップのため複数の伝送端末１０が同じア
ドレスに設定されてしまうため、伝送システムが構成で
きなくなるからである。That is, in FIG. 6, an EEPROM 24 is provided inside the transmission terminal 10 as shown in FIG. 1A, and address setting communication is added to one of the transmission functions, and as shown in FIG. 21 or setting device 9 and transmission terminal 1: 1
The address is set in the EEPROM 24 through the control circuit 5 of the transmission terminal 10 so that the address of the transmission terminal 10 does not overlap with other transmission terminals in the transmission system. This is because if the transmission center 21 or the setting device 9 and a plurality of transmission terminals 10 are installed and setting communication is performed, a plurality of transmission terminals 10 are set to the same address due to multidrop, so that a transmission system cannot be configured. It is.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら図５のよ
うに伝送端末１０のアドレスをＤＩＰスイッチ２２−３
により設定する方式では、ＤＩＰスイッチ２２−３の外
形により端末１０が大形化する問題があるほか、スイッ
チ２２−３の接触不良により誤アドレスが設定されてし
まう可能性もある。However, as shown in FIG. 5, the address of the transmission terminal 10 is assigned to the DIP switch 22-3.
In the method of setting, the terminal 10 may be enlarged due to the outer shape of the DIP switch 22-3, and an erroneous address may be set due to poor contact of the switch 22-3.
【０００８】また図６のように伝送機能にアドレス設定
交信の機能を加え、伝送センタ１１または設定器９と伝
送端末１０を１：１に接続してアドレス設定する方式で
は、伝送端末１０の布設工事終了後のアドレス設定の作
業、端末個々のアドレスが目視できないために生ずるア
ドレス確認作業、あるいはアドレスの変更などが煩わし
く困難である。In the method of adding an address setting communication function to the transmission function as shown in FIG. 6 and connecting the transmission center 11 or the setting unit 9 to the transmission terminal 10 in a one-to-one manner, the transmission terminal 10 is laid. The work of setting the address after the construction is completed, the work of confirming the address that occurs because the address of each terminal cannot be seen, or the change of the address are cumbersome and difficult.
【０００９】また図６の場合、伝送端末１０にアドレス
設定用のシリアル伝送機能を電線の一時的な接触により
追加すると、コネクタの付加により伝送端末１０の外形
が大形化し、またはコネクタ部の防塵対策を必要とし、
あるいはアドレス設定用のシリアル伝送のための電線が
一時的でも配線されるので伝送端末内部にサージ対策を
必要とする等の問題が生ずる。In the case of FIG. 6, if a serial transmission function for setting an address is added to the transmission terminal 10 by temporary contact of an electric wire, the external shape of the transmission terminal 10 becomes larger due to the addition of a connector, or the connector portion is dustproof. Need measures,
Alternatively, since an electric wire for serial transmission for address setting is wired even temporarily, there arises a problem that a surge countermeasure is required inside the transmission terminal.
【００１０】従って本発明の課題は、伝送端末１０の布
設後のアドレス設定，確認，変更を容易に実施でき、伝
送端末１０とは電気的な接続なしにアドレスの設定，確
認，変更が可能な伝送端末の非回線・光交信装置を提供
することにある。Accordingly, an object of the present invention is to easily set, check, and change the address after the transmission terminal 10 is laid, and to set, check, and change the address without electrical connection to the transmission terminal 10. An object of the present invention is to provide a non-line / optical communication device for a transmission terminal.
【００１１】[0011]
【課題を解決するための手段】前記の課題を解決するた
めに、請求項１の非回線・光交信装置は、伝送回線（８
など）にマルチドロップ接続され、動作表示用のＬＥＤ
（１など）を備えた伝送端末（１０など）において、前
記動作表示のため前記ＬＥＤをパルス点灯する手段（ト
ランジスタＴｒ１，Ｔｒ３，制御回路５など）と、前記
ＬＥＤの消灯時においてこのＬＥＤの受光信号を受信す
る手段とを備えたものとする。In order to solve the above-mentioned problems, a non-line / optical communication apparatus according to a first aspect of the present invention includes a transmission line (8).
LED for operation display
In a transmission terminal (e.g., 10) provided with (e.g., 1), a means for illuminating the LED in pulses for the operation display (e.g., transistors Tr1, Tr3, and a control circuit 5); Means for receiving a signal.
【００１２】また請求項２の非回線・光交信装置では、
請求項１に記載の光交信装置において、前記伝送端末は
前記ＬＥＤへ（ＬＥＤ１１などの）発光によるシリアル
伝送信号を与える手段（設定器９など）を外部に備えた
ものであるようにする。さらに請求項３の非回線・光交
信装置では、請求項１または請求項２に記載の光交信装
置において、前記ＬＥＤの受光信号受信手段はこのＬＥ
Ｄを０バイアスまたは逆バイアスする手段（トランジス
タＴｒ２など）と、この０バイアスまたは逆バイアス時
においてこのＬＥＤに流れる電流を検出する手段（オペ
アンプ３など）と、この電流検出手段の検出信号を解読
する手段（コンパレータ４，制御回路５など）とを備え
たものであるようにする。Further, in the non-line / optical communication apparatus according to claim 2,
2. The optical communication device according to claim 1, wherein the transmission terminal is provided with a means (such as a setting unit 9) for providing a serial transmission signal by emitting light (such as the LED 11) to the LED. Further, in the non-line / optical communication apparatus according to claim 3, in the optical communication apparatus according to claim 1 or 2, the light receiving signal receiving means of the LED is provided by the LE.
Means for biasing D to 0 or reverse bias (transistor Tr2 etc.), means for detecting the current flowing to the LED at the time of 0 bias or reverse bias (op amp 3 etc.), and decoding the detection signal of this current detecting means Means (comparator 4, control circuit 5, etc.).
【００１３】[0013]
【作用】伝送端末に設けた動作表示用ＬＥＤをトランジ
スタによりパルス点灯し、このＬＥＤの消灯期間はこの
ＬＥＤを受光素子として用いる。このＬＥＤが受光素子
として動作する間、ＬＥＤの受光信号はオペアンプとコ
ンパレータを介して制御回路に入力される。またＬＥＤ
の点灯時間はトランジスタにより変更可能なようにす
る。The operation display LED provided in the transmission terminal is pulse-lit by a transistor, and the LED is used as a light receiving element during the light-out period of the LED. While the LED operates as a light receiving element, the light receiving signal of the LED is input to the control circuit via the operational amplifier and the comparator. LED
The lighting time of can be changed by a transistor.
【００１４】更に伝送端末とＬＥＤを制御する回路構成
が同じで、操作者がアドレスを入力できるマンマシンイ
ンタフェースを持つ設定器を伝送端末とは別に準備す
る。このようにして伝送端末ではパルス点灯しているＬ
ＥＤの消灯期間にこのＬＥＤは受光素子として働くの
で、設定器から発光されたＬＥＤ信号が検知できる。こ
の検知により伝送端末の制御回路は自身の動作モードを
ＬＥＤの表示動作モードからアドレスの設定，確認，変
更モードに切り替え，外部の設定器のＬＥＤのオン／オ
フによる光送信信号を伝送端末のＬＥＤで受光し、アド
レスの設定，確認，変更の動作を行う。Further, a setting device having the same circuit configuration for controlling the transmission terminal and the LED and having a man-machine interface through which an operator can input an address is prepared separately from the transmission terminal. In this way, the transmission terminal is pulse-lit L
Since the LED functions as a light receiving element during the light-off period of the ED, the LED signal emitted from the setting device can be detected. By this detection, the control circuit of the transmission terminal switches its operation mode from the display operation mode of the LED to the address setting, confirmation, and change mode, and transmits an optical transmission signal by turning on / off the LED of the external setting device to the LED of the transmission terminal. To set, confirm, and change the address.
【００１５】[0015]
【実施例】以下図１ないし図３に基づいて本発明の実施
例を説明する。図１は本発明の実施例としての伝送端末
１０および設定器９の要部の構成図である。この伝送端
末１０内において、１は表示素子と受光素子を兼ねるＬ
ＥＤ、Ｔｒ１，Ｔｒ２，Ｔｒ３はこのＬＥＤ１を駆動す
るトランジスタ、３はＬＥＤ１の受光電流を検出するオ
ペアンプ、４はこのオペアンプ３の出力電圧を基準圧ｒ
ｅｆと比較するコンパレータである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a configuration diagram of a main part of a transmission terminal 10 and a setting unit 9 as an embodiment of the present invention. In this transmission terminal 10, 1 is L which serves both as a display element and a light receiving element.
ED, Tr1, Tr2, Tr3 are transistors for driving the LED1, 3 is an operational amplifier for detecting the light receiving current of the LED1, and 4 is the output voltage of the operational amplifier 3 as a reference voltage r.
ef.
【００１６】またＴＸ／（反転ＲＸ）は制御回路５の送
／受信（モード）切替信号出力端子、ＲＸＤは同じく制
御回路５の受信データ入力端子、ＴＸＤは同じく制御回
路５の送信データ出力端子である。また図１においては
伝送端末１０の外部の設定器９にも伝送端末１０と同じ
ＬＥＤ及びその駆動回路並びに受光信号検出回路が設け
られており、１１は伝送端末１０の１に対応するＬＥ
Ｄ、Ｔｒ１１〜Ｔｒ１３は夫々同じくＴｒ１〜Ｔｒ３に
対応するトランジスタ、１３は同じく３に対応するオペ
アンプ、１４は同じく４に対応するコンパレータであ
る。また１５は伝送端末１０の制御回路５に対応するマ
イクロプロセッサで、このマイクロプロセッサ１５のＴ
Ｘ／（反転ＲＸ）１は伝送端末１０の端子ＴＸ／（反転
ＲＸ）に対応する送／受信モード切替信号出力端子、Ｒ
ＸＤ１は同じく端子ＲＸＤに対応する受信データ入力端
子、ＴＸＤ１は同じく端子ＴＸＤに対応する送信データ
出力端子である。TX / (RX) is a transmission / reception (mode) switching signal output terminal of the control circuit 5, RXD is a reception data input terminal of the control circuit 5, and TXD is a transmission data output terminal of the control circuit 5 as well. is there. In FIG. 1, the same LED as the transmission terminal 10, its driving circuit, and a light-receiving signal detection circuit are also provided in the setting unit 9 outside the transmission terminal 10, and 11 is an LE corresponding to 1 of the transmission terminal 10.
D and Tr11 to Tr13 denote transistors corresponding to Tr1 to Tr3, respectively, 13 denotes an operational amplifier corresponding to 3, and 14 denotes a comparator corresponding to 4. Reference numeral 15 denotes a microprocessor corresponding to the control circuit 5 of the transmission terminal 10;
X / (RX) 1 is a transmission / reception mode switching signal output terminal corresponding to the terminal TX / (RX) of the transmission terminal 10;
XD1 is a reception data input terminal also corresponding to the terminal RXD, and TXD1 is a transmission data output terminal also corresponding to the terminal TXD.
【００１７】次に図２は図１の変形実施例を示す構成図
である。図２においては図１に対し伝送端末１０のＬＥ
Ｄ１に対する駆動トランジスタＴｒ１〜Ｔｒ３の駆動回
路や接続極性および受光電流検出回路の接続極性等が異
なっている。但し、図１ではＬＥＤ１の受光時にＬＥＤ
１を０バイアス状態とするのに対し、図２ではＬＥＤ１
を逆バイアス状態とする点が異なるのみで、図２のその
他の基本的な動作は図１と同様である。FIG. 2 is a block diagram showing a modified embodiment of FIG. 2, the LE of the transmission terminal 10 is different from that of FIG.
The drive circuit and connection polarity of the drive transistors Tr1 to Tr3 with respect to D1 and the connection polarity of the photocurrent detection circuit are different. However, in FIG.
1 is set to 0 bias state, whereas in FIG.
2 is the same as that of FIG. 1 except that the operation is reverse biased.
【００１８】図３は図１，図２の動作説明用のタイムチ
ャートで、上から順に伝送端末１０のＬＥＤ１の点滅の
タイミング、設定器９のＬＥＤ１１の動作のタイミン
グ、および伝送端末１０の受信データ入力端子ＲＸＤの
信号入力のタイミングを夫々示す。次に図３を参照しつ
つ図１，図２の動作を説明する。伝送端末１０の動作表
示用のＬＥＤ１は常時は図３の期間Ｔ１のように例えば
周波数５００ＨＺでパルス点灯しているが、人間の目に
は点滅速度が速いため、ＬＥＤの点滅は判らない。図
１，図２におけるＬＥＤ１の点灯電流の経路は電源→ト
ランジスタＴｒ１→ＬＥＤ１→トランジスタＴｒ３→グ
ランドＧＮＤであり、Ｔｒ１とＴｒ３をオンするため端
子ＴＸ／（反転ＲＸ）とＴＸＤの出力信号は‘Ｈ’とす
る。FIG. 3 is a time chart for explaining the operation of FIGS. 1 and 2, in which, from the top, the blinking timing of the LED 1 of the transmission terminal 10, the operation timing of the LED 11 of the setting unit 9, and the reception data of the transmission terminal 10. The timing of signal input to the input terminal RXD is shown. Next, the operation of FIGS. 1 and 2 will be described with reference to FIG. The LED 1 for displaying the operation of the transmission terminal 10 is always pulse-lit at, for example, a frequency of 500 Hz as in the period T1 in FIG. 3, but the blinking speed of the human eye is so high that the blinking of the LED cannot be recognized. In FIG. 1 and FIG. 2, the path of the lighting current of LED1 is from power supply → transistor Tr1 → LED1 → transistor Tr3 → ground GND. To turn on Tr1 and Tr3, the output signals of terminals TX / (RX) and TXD are set to 'H'. '.
【００１９】一方、パルス点灯により動作表示している
ＬＥＤ１の消灯期間にはトランジスタＴｒ１オフ，Ｔｒ
２オン，Ｔｒ３オフとして、ＬＥＤ１とオペアンプ３と
でＬＥＤ１の受光信号，すなわち電流信号を電圧に変換
するＩ−Ｖ変換回路を構成する。本来、発光素子である
ＬＥＤ１は図１のような０Ｖバイアスまたは図２のよう
な逆バイアス状態にしたとき、接合に空之層が生じ、光
照射すればフォトダイオードと同様にカソード→アノー
ドに電流を流す動作をする。On the other hand, during the extinguishing period of the LED 1 which is operatively displayed by the pulse lighting, the transistor Tr1 is turned off and Tr1 is turned off.
The LED1 and the operational amplifier 3 constitute an IV conversion circuit that converts a light receiving signal of the LED1, that is, a current signal into a voltage by turning the transistor 2 on and the transistor Tr3 off. Originally, when the LED1, which is a light emitting element, is in a 0V bias state as shown in FIG. 1 or a reverse bias state as shown in FIG. 2, an empty layer is formed at the junction, and when light is irradiated, a current flows from the cathode to the anode similarly to the photodiode. Is performed.
【００２０】なおこのときＬＥＤ１の受光電流の経路は
図１ではオペアンプ３の出力端→抵抗Ｒ１→ＬＥＤ１→
トランジスタＴｒ２→グランドＧＮＤとなり、図２では
電源→トランジスタＴｒ２→ＬＥＤ１→抵抗Ｒ１→オペ
アンプ３の出力端となる。このように図３の消灯期間ｔ
２に設定器９側からのＬＥＤ１１の光が照射されること
で、図１，図２のオペアンプ３の帰還抵抗Ｒ１を通して
電流が流れ、オペアンプ３の出力には設定器９からの受
光信号が電圧として得られる。さらにこの電圧信号をコ
ンパレータ４により比較基準電圧ｒｅｆと比較すること
により、デジタルの受信信号が得られ、制御回路５はこ
の受信信号を受信データ入力端子ＲＸＤに入力して解読
する。At this time, the path of the light-receiving current of LED1 is shown in FIG. 1 as the output terminal of operational amplifier 3 → resistance R1 → LED1 →
The transistor Tr2 becomes the ground GND. In FIG. 2, the power supply becomes the transistor Tr2, the LED1, the resistor R1, and the output terminal of the operational amplifier 3. Thus, the light-off period t in FIG.
2 is irradiated with light of the LED 11 from the setter 9 side, a current flows through the feedback resistor R1 of the operational amplifier 3 in FIGS. 1 and 2, and a light receiving signal from the setter 9 is applied to the output of the operational amplifier 3 as a voltage. Is obtained as Further, by comparing this voltage signal with the comparison reference voltage ref by the comparator 4, a digital reception signal is obtained, and the control circuit 5 inputs this reception signal to the reception data input terminal RXD and decodes it.
【００２１】なおここでコンパレータ４のしきい値とし
ての基準電圧ｒｅｆは周囲から照射される太陽光線，蛍
光灯の光を受光信号と判断しないレベルに設定する。一
方、ＬＥＤ１の発光中（図３のｔ１期間）にはＬＥＤ１
が受光して流す電流に比べて大きな電流が流されること
に伴い、そのベース領域（ｎ側）に多くの過剰な少数電
荷が蓄積され、受光モードに切り替えてもこの少数電荷
が掃き出されるまで（つまり図３の期間ｔ３が経過する
まで）はＬＥＤ１に受光能力がないので、制御回路５の
受信データ入力端子ＲＸＤの受光判定は、図３に示すよ
うにＬＥＤ１を動作表示する直前、つまりＬＥＤ１を消
灯して約１ｍｓｅｃ経過後とする。Here, the reference voltage ref as the threshold value of the comparator 4 is set to a level at which the sunlight and fluorescent light emitted from the surroundings are not determined as a light receiving signal. On the other hand, during the light emission of LED1 (period t1 in FIG. 3), LED1
With the flow of a large current compared to the current that is received and transmitted, a large amount of excessive minority charges are accumulated in the base region (n side) of the base region. Since the LED 1 has no light receiving ability until the period t3 in FIG. 3 elapses, the light receiving determination of the reception data input terminal RXD of the control circuit 5 is performed immediately before the operation display of the LED 1 as shown in FIG. Is turned off and about 1 msec elapses.
【００２２】この後、伝送端末１０は設定器９から送信
される点灯状態を５ｍｓｅｃ以上検知し、次に設定器９
より図３の期間Ｔ２に送信されるアドレス設定の伝送デ
ータを受信し、エラーチェック判断した後、エラーがな
ければ設定器９より設定されたアドレスを、１ｍｓｅｃ
後の図３の期間Ｔ３に、ＬＥＤ１を点滅させて設定器９
へ応答データとして伝送する。この応答データを受け取
った設定器９は、更に１ｍｓｅｃ後の図３の期間Ｔ４
に、ＡＣＫ信号を伝送端末１０に送ることで設定交信を
終了する。Thereafter, the transmission terminal 10 detects the lighting state transmitted from the setting unit 9 for 5 msec or more, and then detects the lighting state.
After receiving the transmission data of the address setting transmitted during the period T2 in FIG. 3 and judging the error, if there is no error, the address set by the setting unit 9 is changed to 1 msec.
In a later period T3 of FIG.
Is transmitted as response data. Upon receiving this response data, the setting unit 9 further sets the period T4 of FIG. 3 after 1 msec.
Then, by transmitting an ACK signal to the transmission terminal 10, the setting communication is terminated.
【００２３】このＡＣＫ信号を受け取った伝送端末１０
は設定器９との交信により新規に設定されたアドレスを
ＥＥＰＲＯＭ２４に書き込んでアドレスの保持を行う。
尚、伝送手順にエラーがあったときは、伝送端末１０は
ＬＥＤ１をパルス点灯（動作表示状態）とし、最初から
設定をやり直す。また設定器９はＡＣＫ送信までの伝送
手順まで進まず、途中で伝送が止まってしまったら、設
定器９の図外の表示器にエラー表示を行う、これにより
設定者は再設定を実施する。The transmission terminal 10 receiving this ACK signal
Writes an address newly set by communication with the setting unit 9 in the EEPROM 24 and holds the address.
If there is an error in the transmission procedure, the transmission terminal 10 turns the LED 1 on in a pulse (operation display state) and resets the settings from the beginning. In addition, the setting unit 9 does not proceed to the transmission procedure up to the transmission of the ACK. If the transmission stops halfway, an error is displayed on a display unit (not shown) of the setting unit 9, whereby the setter performs resetting.
【００２４】ＬＥＤ１，１１を用いた伝送には伝送端末
１０が発光出力したアドレスを設定器９が読み込む伝送
コマンドを設定器９が発光出力することで、伝送端末１
０のアドレスの確認を設定器９が行うことも可能であ
る。For transmission using the LEDs 1 and 11, the setting unit 9 emits a transmission command for reading the address from which the transmission terminal 10 emits light, so that the transmission terminal 1 emits light.
It is also possible for the setting unit 9 to confirm the address of 0.
【００２５】[0025]
【発明の効果】本発明によれば伝送端末の動作表示用の
ＬＥＤを伝送端末の伝送回線を用いない（光交信によ
る）アドレス設定用のシリアル伝送の受光手段とするよ
うにしたので、伝送システムを布設した後にもアドレス
の設定，確認，更新が、設定器と伝送端末の電気的な接
続なしに容易に実施できる。According to the present invention, the LED for displaying the operation of the transmission terminal is used as a light receiving means for serial transmission for address setting (by optical communication) without using the transmission line of the transmission terminal. Even after laying the address, setting, checking, and updating of the address can be easily performed without electrical connection between the setting device and the transmission terminal.
【００２６】また本発明はトランジスタ，オペアンプ，
コンパレータの簡単な回路を用い、伝送端末の制御回路
がマイクロコンピュータであれば、簡単なソフトウェア
の変更により実現できる。更に本発明は動作表示用のＬ
ＥＤをアドレス設定のシリアル伝送の受光手段としてい
るので製品の外観は何ら変わることがない。The present invention also relates to a transistor, an operational amplifier,
If a simple circuit of the comparator is used and the control circuit of the transmission terminal is a microcomputer, it can be realized by a simple change of software. Further, the present invention provides an L for operation display.
Since the ED is used as the light receiving means for serial transmission of the address setting, the appearance of the product does not change at all.
【図１】本発明の実施例としての構成を示す図FIG. 1 is a diagram showing a configuration as an embodiment of the present invention.
【図２】図１の変形実施例を示す構成図FIG. 2 is a configuration diagram showing a modified example of FIG. 1;
【図３】図１，図２のＬＥＤを利用した伝送のタイミン
グを示すタイムチャートFIG. 3 is a time chart showing transmission timing using the LEDs of FIGS. 1 and 2;
【図４】一般的なマルチドロップ回線伝送システムの構
成図FIG. 4 is a configuration diagram of a general multi-drop line transmission system.
【図５】従来の伝送端末のアドレス設定方式の一例を示
す構成図FIG. 5 is a configuration diagram showing an example of a conventional transmission terminal address setting method.
【図６】従来の伝送端末のアドレス設定方式の他の例を
示す構成図FIG. 6 is a configuration diagram showing another example of a conventional transmission terminal address setting method.
１ ＬＥＤ Ｔｒ１ トランジスタ Ｔｒ２ トランジスタ Ｔｒ３ トランジスタ ３ オペアンプ ４ コンパレータ ５ 制御回路 ６ レシーバ ７ ドライバ ８ 伝送回線 ９ 設定器 １０ 伝送端末 １１ ＬＥＤ Ｔｒ１１ トランジスタ Ｔｒ１２ トランジスタ Ｔｒ１３ トランジスタ １３ オペアンプ １４ コンパレータ １５ マイクロプロセッサ ２１ 伝送センタ ２４ ＥＥＰＲＯＭ REFERENCE SIGNS LIST 1 LED Tr1 transistor Tr2 transistor Tr3 transistor 3 operational amplifier 4 comparator 5 control circuit 6 receiver 7 driver 8 transmission line 9 setting device 10 transmission terminal 11 LED Tr11 transistor Tr12 transistor Tr13 transistor 13 operational amplifier 14 comparator 15 microprocessor 21 transmission center 24 EEPROM
Claims (3)
表示用のＬＥＤを備えた伝送端末において、 前記動作表示のため前記ＬＥＤをパルス点灯する手段
と、 前記ＬＥＤの消灯時においてこのＬＥＤの受光信号を受
信する手段とを備えたことを特徴とする伝送端末の非回
線・光交信装置。1. A transmission terminal multi-drop-connected to a transmission line and provided with an LED for operation display, means for pulsing the LED for the operation display, and a light receiving signal of the LED when the LED is turned off. And a means for receiving a communication line.
記伝送端末は前記ＬＥＤへ発光によるシリアル伝送信号
を与える手段を外部に備えたものであることを特徴とす
る伝送端末の非回線・光交信装置。2. An optical communication apparatus according to claim 1, wherein said transmission terminal is provided with means for externally providing a serial transmission signal by light emission to said LED. Optical communication device.
置において、前記ＬＥＤの受光信号受信手段はこのＬＥ
Ｄを０バイアスまたは逆バイアスする手段と、 この０バイアスまたは逆バイアス時においてこのＬＥＤ
に流れる電流を検出する手段と、 この電流検出手段の検出信号を解読する手段とを備えた
ものであることを特徴とする伝送端末の非回線・光交信
装置。3. The optical communication device according to claim 1, wherein said LED light receiving signal receiving means comprises an LE.
Means for biasing or reverse-biasing D;
A non-line / optical communication apparatus for a transmission terminal, comprising: means for detecting a current flowing through the communication terminal; and means for decoding a detection signal of the current detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04009562A JP3099487B2 (en) | 1992-01-23 | 1992-01-23 | Non-line / optical communication equipment for transmission terminals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04009562A JP3099487B2 (en) | 1992-01-23 | 1992-01-23 | Non-line / optical communication equipment for transmission terminals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05199243A JPH05199243A (en) | 1993-08-06 |
| JP3099487B2 true JP3099487B2 (en) | 2000-10-16 |
Family
ID=11723736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04009562A Expired - Fee Related JP3099487B2 (en) | 1992-01-23 | 1992-01-23 | Non-line / optical communication equipment for transmission terminals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3099487B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19743981C2 (en) * | 1997-10-06 | 1999-11-25 | Ifm Electronic Gmbh | Method for assigning addresses to an actuator-sensor-interface-slave as well as actuator-sensor-interface-slave and address programming device for carrying out the method |
| JP4212402B2 (en) | 2003-02-21 | 2009-01-21 | 株式会社コマデン | Light emitting unit |
-
1992
- 1992-01-23 JP JP04009562A patent/JP3099487B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05199243A (en) | 1993-08-06 |
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