【０００１】[0001]
【産業上の利用分野】本発明は、モ−タ等の設備機器の
遠方制御をする際に，制御部と被制御部との間を１本の
電線にてＡＣ電源に直列にル−プ接続した簡潔な回路構
成により電源供給と制御指令や動作表示の信号通信とを
行い得る，遠方制御用電源供給及び通信方法とその装置
に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a loop for connecting a control unit and a controlled unit in series with an AC power source with a single electric wire when remotely controlling equipment such as a motor. The present invention relates to a distant control power supply and communication method and apparatus capable of performing power supply and signal communication of control commands and operation displays by a simple circuit configuration connected.
【０００２】[0002]
【従来の技術】従来において斯かる遠方制御における電
源供給と信号通信は、一般に制御部と被制御部との間
を，電源供給用，信号通信用及びコモン線用の３本の電
線を用いて接続する、或は信号通信用と電源供給用とを
共通にして２本の電線を用いて接続することにより行わ
れていた。しかしこの場合には，前者の３本線によるも
のにおいては、配線本数が多いため配線構造が複雑とな
り配線間違いの不都合のおそれが生ずるとともに、配線
接続の手数や経費もかかり経済的ではないという難点が
あった。 また後者の２本線によるものにおいては、斯
かる難点は緩和されるが、信号通信電流が電源供給電流
と兼用されていて両者が分離して用いられていないた
め、電源供給回路が複雑となるという難点を有している
ばかりでなく，信号通信用の電力を大きくすると放射ノ
イズが発生するため制御の安定性に欠け，制御部へ供給
する電力や伝送距離も自ら小さく制限されざるを得ない
という難点を有していた。2. Description of the Related Art Conventionally, power supply and signal communication in such remote control generally use three electric wires between a control unit and a controlled unit for power supply, signal communication and common line. This is done by connecting or using two electric wires for signal communication and power supply in common. In this case, however, the former three-line system has a drawback that the number of wiring lines is large and the wiring structure is complicated, which may cause inconvenience of wiring mistakes, and it is also uneconomical because of labor and cost for wiring connection. there were. Further, in the latter two-line system, such a difficulty is alleviated, but since the signal communication current is also used as the power supply current and the two are not separately used, the power supply circuit becomes complicated. Not only does it have drawbacks, but when the power for signal communication is increased, radiation noise occurs, so control stability is lacking, and the power supplied to the control unit and the transmission distance must be limited by themselves. It had some difficulties.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、前記
従来技術の難点を解消し，配線構造が簡潔で，モ−タ等
の遠方制御を電圧変動や外来ノイズに影響されることな
く安定的に，且つ，経済的に行うことができる遠方制御
用電源供給及び通信方法とその装置を提供することを目
的とする。Therefore, the present invention solves the above-mentioned drawbacks of the prior art, has a simple wiring structure, and enables remote control of a motor or the like to be stable without being affected by voltage fluctuations or external noise. In addition, it is an object of the present invention to provide a remote control power supply and communication method and a device therefor which can be economically performed.
【０００４】[0004]
【課題を解決するための手段】しかして本発明は、モ−
タ等の設備機器の遠方制御をする制御部と被制御部にお
いて，電源供給側の被制御部に電源供給回路と信号の送
受信回路とを一対のダイオ−ドを介して逆極性に並列接
続した回路を設ける一方，被電源供給側の制御部に安定
化電源回路と信号の送受信回路とを一対のダイオ−ドを
介して逆極性に並列接続した回路を設け、 この被制御
部と制御部における夫々の逆並列回路を１本の電線にて
ＡＣ電源に直列にル−プ接続し、このＡＣ電源の交番電
流をその向きにより一方を電源供給用に，他方を信号通
信用にと分離して使用するようになしたことを特徴とす
る。SUMMARY OF THE INVENTION The present invention, however, has a
In a control unit and a controlled unit for remote control of equipment such as a power supply, a power supply circuit and a signal transmission / reception circuit are connected in parallel to the controlled unit on the power supply side in opposite polarities via a pair of diodes. While the circuit is provided, a circuit in which a stabilized power supply circuit and a signal transmission / reception circuit are connected in parallel in opposite polarities via a pair of diodes is provided in the control unit on the power supply side. Each anti-parallel circuit is loop-connected to the AC power supply in series with one wire, and the alternating current of this AC power supply is separated into one for power supply and the other for signal communication by its direction. It is characterized by being used.
【０００５】そして前記制御部及び被制御部の信号の送
受信回路としては、送信フォトカプラと電流制御トラン
ジスタと定電流ダイオ−ドを有する送信部と，しきい値
電流検出トランジスタとしきい値電流検出抵抗と受信フ
ォトカプラを有する受信部とを具備してなり、この送信
部は，送信フォトカプラに入力された制御指令或は動作
状態の表示信号を電流信号として相手側に送るべく，電
流制御トランジスタのコレクタ・ベ−ス間に定電流ダイ
オ−ドを，ベ−ス・エミッタ間に送信フォトカプラの出
力端を接続し、前記受信部は，相手側から送られる電流
信号を受信するべく，しきい値電流検出トランジスタの
ベ−ス・エミッタ間にしきい値電流検出抵抗を介して受
信フォトカプラの入力端を接続し、且つしきい値電流検
出トランジスタのベ−スとコレクタは夫々電流制御トラ
ンジスタのエミッタとベ−スへ接続して構成したものを
用いる場合がある。The transmitting and receiving circuits for signals of the control unit and the controlled unit include a transmission photocoupler, a current control transistor, a transmission unit having a constant current diode, a threshold current detection transistor and a threshold current detection resistor. And a receiving unit having a receiving photocoupler, and the transmitting unit includes a current control transistor of the current control transistor in order to send the control command input to the transmitting photocoupler or the display signal of the operating state to the other side as a current signal. A constant current diode is connected between the collector and the base, and an output end of the transmitting photocoupler is connected between the base and the emitter, and the receiving section receives a current signal sent from the other side. The input end of the receiving photocoupler is connected between the base and emitter of the value current detection transistor through the threshold current detection resistor, and the threshold current detection transistor - Graphics and collector emitter and base of the respective current control transistor - in some cases to use one constituted by connecting to the scan.
【０００６】また，前記被制御部の電源供給回路として
は、前記信号の送受信回路と同一の構成要素を有する送
受信回路とモノマルチ回路とを具備してなり、通信線の
短絡による過電流を防止するべく，その送受信回路の受
信フォトカプラの出力端と送信フォトカプラの入力端と
をモノマルチ回路を介して接続せしめたものを用いる場
合がある。Further, as a power supply circuit for the controlled unit, a transmission / reception circuit having the same components as the signal transmission / reception circuit and a mono-multi circuit are provided to prevent an overcurrent due to a short circuit of the communication line. Therefore, there is a case where an output end of the receiving photocoupler of the transmitting / receiving circuit and an input end of the transmitting photocoupler are connected via a monomulti circuit.
【０００７】[0007]
【作用】電源供給側の被制御部と被電源供給側の制御部
とは以上のとおり配線接続されているので、ル−プ接続
回路にＡＣ電源を入れると，ＡＣ電源の交番電流は、制
御部と被制御部において電源回路と送受信回路との逆並
列回路を形成している一対のダイオ−ドの存在により，
流れる方向を異にする電源電流と通信電流とに分離され
てル−プ接続回路内を流れる。すなわち，ＡＣ電源の交
番電流の一方の向きのものを電源電流として用い，他方
の向きのものを通信電流として用いるものであり、一方
の向きの電源電流は被制御部の電源供給回路を通って制
御部の安定化電源回路側へと流れ電源が供給される。
他方の向きの通信電流は制御部の送受信回路を通って被
制御部の送受信回路側へと流れ，これを利用して制御指
令や動作状態の表示信号の送信及び受信をなし設備機器
の遠方制御をする。また，ル−プ接続回路を形成する電
線が何らかの原因で短絡した場合には、被制御部の電源
供給回路における送受信回路がその短絡電流を検知し，
モノマルチ回路を介して電流制御トランジスタが一定時
間ＯＦＦされ、過電流によるトランジスタの熱破損が防
止される。Since the controlled part on the power supply side and the controlled part on the power supply side are wired as described above, when AC power is supplied to the loop connection circuit, the alternating current of the AC power supply is controlled. The existence of a pair of diodes forming an anti-parallel circuit of the power supply circuit and the transmission / reception circuit in the control section and the controlled section,
The power supply current and the communication current, which flow in different directions, are separated from each other and flow in the loop connection circuit. That is, one of the alternating currents of the AC power supply is used as the power supply current and the other of the alternating currents is used as the communication current, and the power supply current in one direction is passed through the power supply circuit of the controlled unit. Power flows to the stabilized power supply circuit side of the control unit and is supplied with power.
The communication current in the other direction flows through the transmission / reception circuit of the control unit to the transmission / reception circuit side of the controlled unit, which is used to transmit and receive control commands and operating state display signals, and to control equipment equipment remotely. do. In addition, when the electric wire forming the loop connection circuit is short-circuited for some reason, the transmission / reception circuit in the power supply circuit of the controlled unit detects the short-circuit current,
The current control transistor is turned off for a certain period of time via the mono-multi circuit to prevent thermal damage to the transistor due to overcurrent.
【０００８】[0008]
【実施例】次に別紙図面について，本発明の１実施例を
説明する。図１は本発明の全体構成を系統的に示した系
統説明図、図２は本発明の制御部と被制御部の具体的構
成の１例を示した回路図である。図１において、Ｍはモ
−タ等の設備機器が配設された被制御部で，制御用に使
用されるリモコントランス等のＡＣ電源Ｅの近くに設置
されている。 Ｓは、この設備機器を操作パネル等によ
り遠方制御する制御部である。被制御部Ｍには、信号の
送受信回路１と電源供給回路２とを一対のダイオ−ドｄ
１，ｄ２を介して逆極性に並列接続した回路が設けられ
ており、この逆並列回路の一端は端子Ａに，他端は端子
Ｂに接続している。 制御部Ｓにも同様に，信号の送受
信回路１１と安定化電源回路３とを一対のダイオ−ドｄ
３，ｄ４を介して逆極性に並列接続した回路が設けられ
ており、この逆並列回路の一端は端子Ｘに，他端は端子
Ｙに接続している。ＡＣ電源Ｅの一端は端子Ａに，他端
は端子Ｘに電線４を介して接続されており、端子ＢとＹ
間も電線４にて接続されている。 したがって制御部Ｓ
と被制御部Ｍに設けられた逆並列回路は、１本の電線４
にてＡＣ電源に直列にル−プ接続されている。しかして
このル−プ接続回路のＡＣ電源Ｅを入れると，前記一対
のダイオ−ドｄ１，ｄ２とｄ３，ｄ４により，その交番
電流はその向きによってル−プ内を流れる方向を異にす
る電源電流Ｉｂと通信電流Ｉａとに分離される。 その
ため交番電流の一方の向きの電源電流Ｉｂは、ル−プ内
を被制御部Ｍの電源供給回路２を通って制御部の安定化
電源回路３へと流れ，電源が供給される。 これに対し
て他方の向きの通信電流Ｉａは、これとは逆に制御部Ｓ
の送受信回路１１を通って被制御部Ｍの送受信回路１へ
と流れるので、これを利用して制御指令や動作状態の表
示信号の送信と受信を行う。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the attached drawings. FIG. 1 is a system explanatory view systematically showing the overall configuration of the present invention, and FIG. 2 is a circuit diagram showing an example of a specific configuration of a control unit and a controlled unit of the present invention. In FIG. 1, M is a controlled unit in which equipment such as a motor is arranged, and is installed near an AC power source E such as a remote control transformer used for control. S is a control unit that remotely controls this equipment by an operation panel or the like. The controlled unit M includes a signal transmitting / receiving circuit 1 and a power supply circuit 2 as a pair of diodes d.
There is provided a circuit connected in parallel in reverse polarity via 1 and d2. One end of this anti-parallel circuit is connected to terminal A and the other end is connected to terminal B. Similarly, in the control unit S, a signal transmitting / receiving circuit 11 and a stabilized power supply circuit 3 are provided as a pair of diodes d.
A circuit connected in parallel with an opposite polarity via 3, 3 is provided. One end of this anti-parallel circuit is connected to the terminal X and the other end is connected to the terminal Y. One end of the AC power source E is connected to the terminal A and the other end is connected to the terminal X via the electric wire 4, and the terminals B and Y are connected.
The electric wires 4 are also connected between them. Therefore, the control unit S
And the anti-parallel circuit provided in the controlled part M is one electric wire 4
Is connected in series with the AC power supply in a loop. When the AC power supply E of the loop connection circuit is turned on, however, the pair of diodes d1, d2 and d3, d4 cause the alternating current to flow in the loop in different directions depending on its direction. The current Ib and the communication current Ia are separated. Therefore, the power supply current Ib in one direction of the alternating current flows in the loop through the power supply circuit 2 of the controlled part M to the stabilized power supply circuit 3 of the control part, and the power is supplied. On the other hand, the communication current Ia in the other direction is opposite to this, the control unit S
Since it flows through the transmission / reception circuit 11 of the controlled unit M to the transmission / reception circuit 1 of the controlled part M, the control signal and the display signal of the operating state are transmitted and received by utilizing this.
【０００９】前記被制御部Ｍと制御部Ｓ内の各回路の具
体的構造は、図２により構成されている。 被制御部Ｍ
の送受信回路１は、送信フォトカプラＰ１と，電流制御
トランジスタＱ１と，定電流ダイオ−ドＣＲＤとを有す
る送信部と、しきい値電流検出トランジスタＱ２と，し
きい値電流検出抵抗Ｒと，受信フォトカプラＰ２とを有
する受信部とを具備している。この送信部は、送信フォ
トカプラＰ１に入力された設備機器の動作状態を表示す
る１，０レベルのデ−タ信号を強弱電流信号に変換して
制御部Ｓへ送るべく、電流制御トランジスタＱ１のコレ
クタ・ベ−ス間に定電流ダイオ−ドＣＲＤを接続すると
ともに，電流制御トランジスタＱ１のベ−ス・エミッタ
間に送信フォトカプラＰ１の出力端を接続している。
電流制御トランジスタＱ１のコレクタと定電流ダイオ−
ドＣＲＤとの接続端部は、ダイオ−ドｄ１のカソ−ドに
接続している。一方，受信部は、制御部Ｓから送られた
制御指令の強弱電流信号を１，０レベルのデ−タ信号に
変換して受信するべく、しきい値電流検出トランジスタ
Ｑ２のベ−ス・エミッタ間にしきい値電流検出抵抗Ｒを
介して受信フォトカプラＰ２の入力端を接続するととも
に，電流制御トランジスタＱ１としきい値電流検出トラ
ンジスタＱ２とで定電流回路を形成するべく，しきい値
電流検出トランジスタＱ２のベ−スとコレクタは、夫々
電流制御トランジスタＱ１のエミッタとベ−スへ接続し
ている。 しきい値電流検出抵抗Ｒと受信フォトカプラ
Ｐ２の入力端との接続端部は、端子Ａに接続している。
制御部Ｓの送受信回路１１も、送信フォトカプラＰ１に
入力された制御指令としての１，０レベルのデ−タ信号
を強弱の電流信号に変換して被制御部Ｍに送り，被制御
部Ｍから送られた動作状態表示の強弱電流信号を１，０
レベルのデ−タ信号に変換して受信するべく、前記被制
御部Ｍの送受信回路１と全く同一の構成要素，接続構成
となっている。 ただこの場合には、電流制御トランジ
スタＱ１のコレクタと定電流ダイオ−ドＣＲＤとの接続
端部はダイオ−ドｄ３のカソ−ドへ接続し，しきい値電
流検出抵抗Ｒと受信フォトカプラＰ２の入力端との接続
端部は端子Ｙに接続している。The specific structure of each circuit in the controlled section M and the control section S is constructed as shown in FIG. Controlled part M
The transmitter / receiver circuit 1 includes a transmitter having a transmitter photocoupler P1, a current control transistor Q1, a constant current diode CRD, a threshold current detection transistor Q2, a threshold current detection resistor R, and a receiver. And a receiver having a photocoupler P2. This transmitting section converts the 1,0 level data signal indicating the operating state of the equipment input into the transmitting photocoupler P1 into a strong / weak current signal and sends it to the control section S so that the current control transistor Q1 can be supplied. A constant current diode CRD is connected between the collector and the base, and an output end of the transmission photocoupler P1 is connected between the base and the emitter of the current control transistor Q1.
Current control transistor Q1 collector and constant current diode
The connection end with the drive CRD is connected to the cathode of the diode d1. On the other hand, the receiving unit converts the strong / weak current signal of the control command sent from the control unit S into a data signal of 1,0 level and receives the converted signal, and the base / emitter of the threshold current detection transistor Q2. In order to connect the input end of the receiving photocoupler P2 via the threshold current detection resistor R, and to form a constant current circuit with the current control transistor Q1 and the threshold current detection transistor Q2, The base and collector of Q2 are connected to the emitter and base of current control transistor Q1, respectively. The connection end portion between the threshold current detection resistor R and the input end of the receiving photocoupler P2 is connected to the terminal A.
The transmission / reception circuit 11 of the control unit S also converts the 1,0 level data signal as a control command input to the transmission photocoupler P1 into a strong and weak current signal and sends it to the controlled unit M, and the controlled unit M The strong and weak current signals sent from
In order to convert and receive the level data signal, the transmitting and receiving circuit 1 of the controlled part M has exactly the same components and connection configuration. However, in this case, the connection end of the collector of the current control transistor Q1 and the constant current diode CRD is connected to the cathode of the diode d3, and the threshold current detection resistor R and the receiving photocoupler P2 are connected. The connection end with the input end is connected to the terminal Y.
【００１０】被制御部Ｍの電源供給回路２は、前記送受
信回路１，１１と同様の送受信回路２１と，モノマルチ
回路２２とを具備しており、制御部Ｓと被制御部Ｍ間の
通信線において線間短絡事故による過電流を防止するべ
く，送受信回路２１の受信フォトカプラＰ２の出力端と
送信フォトカプラＰ１の入力端をモノマルチ回路２２を
介して接続している。 そして，電流制御トランジスタ
Ｑ１のコレクタと定電流ダイオ−ドＣＲＤとの接続端部
は端子Ａへ接続し，しきい値電流検出抵抗Ｒと受信フォ
トカプラＰ２の入力端との接続端部はダイオ−ドｄ２の
アノ−ドへ接続している。また，制御部Ｓの安定化電源
回路３は、被制御部Ｍの電源供給回路２を通って供給さ
れてくるＡＣ電源の一方の向きの電源電流を平滑化して
安定化電源を得るべく，図２に示すように，三端子レギ
ュレ−タの両端に電解コンデンサを接続したものであ
り、入力端は端子Ｙに，出力端はダイオ−ドｄ４のアノ
−ドに接続している。The power supply circuit 2 of the controlled unit M includes a transmitting / receiving circuit 21 similar to the transmitting / receiving circuits 1 and 11 and a mono-multi circuit 22. Communication between the controlling unit S and the controlled unit M is performed. In order to prevent overcurrent due to a short circuit between lines, the output end of the reception photocoupler P2 of the transmission / reception circuit 21 and the input end of the transmission photocoupler P1 are connected via a mono-multi circuit 22. The connection end between the collector of the current control transistor Q1 and the constant current diode CRD is connected to the terminal A, and the connection end between the threshold current detection resistor R and the input end of the receiving photocoupler P2 is diode. It is connected to the node d2. Further, the stabilized power supply circuit 3 of the control unit S smoothes the power supply current in one direction of the AC power supplied through the power supply circuit 2 of the controlled unit M to obtain a stabilized power supply. As shown in FIG. 2, an electrolytic capacitor is connected to both ends of the three-terminal regulator, the input end is connected to the terminal Y, and the output end is connected to the anode of the diode d4.
【００１１】図３は、ＡＣ電源Ｅの交番電圧Ｅに対する
電源電流Ｉｂと通信電流Ｉａとに分離された交番電流の
波形図であり、図４は、同図の通信サイクルにおける送
信信号と通信電流と受信信号とのタイムチャ−ト図であ
る。 この図に基づいて，被制御部Ｍと制御部Ｓ間にお
ける信号通信と電源供給の動作について説明する。ＡＣ
電源の交番電流が図３の通信サイクルで図４のＴ１の状
態では、被制御部Ｍと制御部Ｓの送信信号はまだ待ち状
態であり，共にレベル０である。ＡＣ電源Ｅの電圧が０
クロスから次第に上昇してくると，制御部Ｓの送受信回
路１１の定電流ダイオ−ドＣＲＤを通して電流制御トラ
ンジスタＱ１のベ−スへ通信電流Ｉａが流れ，電流制御
トランジスタＱ１は導通し電圧の上昇に従って，電流は
増大するが，しきい値電流検出抵抗Ｒの両端に発生した
電位がベ−ス・エミッタ順電圧とフォトカプラ入力電圧
の和である約１．８Ｖ付近になると，しきい値電流検出
トランジスタＱ２のベ−スに電流が流れて動作し、電流
制御トランジスタＱ１のベ−ス電流を制限して定電流と
なり、定電流ダイオ−ドＣＲＤに流れる電流Ｉｄも一定
となる。 電流Ｉｄは、そのほとんどが受信フォトカプ
ラＰ２の入力端に流れ、出力端の受信信号は共にレベル
１から０に変化して，被制御部Ｍ及び制御部Ｓ側共に通
信可能状態となったことが分かる。次にタイムチャ−ト
Ｔ２の状態となったときに，被制御部Ｍから設備機器の
動作状態の表示信号（デ−タ１）を送るべく送信フォト
カプラＰ１への送信信号のレベルを１にすると，送信フ
ォトカプラＰ１の入力端に電流が流れてその出力端は短
絡され，電流制御トランジスタＱ１のベ−ス・エミッタ
間も短絡されるので，電流制御トランジスタＱ１はＯＦ
Ｆになり，しきい値電流検出抵抗Ｒに流れる電流は定電
流ダイオ−ドＣＲＤを通して流れる電流Ｉｄだけにな
る。 電流Ｉｄは，しきい値電流Ｉｃより十分に小さい
値に設定しており，しきい値電流検出トランジスタＱ２
はＯＦＦになり受信フォトカプラＰ２の入力端に流れる
電流は０になって，その出力端の受信信号のレベルは１
となる。このとき直列にル−プ接続してある制御部Ｓの
送受信回路１１にも，しきい値電流Ｉｃより十分に小さ
い電流Ｉｄが流れるので，電流制御トランジスタＱ１は
ＯＮ状態となるが，しきい値電流検出トランジスタＱ２
はＯＦＦ状態となり，受信フォトカプラＰ２の入力端電
流は０になって，その出力端の受信信号のレベルは１と
なる。したがって，被制御部Ｍの送信信号をレベル１に
すると，制御部Ｓの受信信号もレベル１となったわけ
で，これによって被制御部Ｍから制御部Ｓへデ−タ１の
動作状態表示の信号を送信することができる。次に，被
制御部Ｍから制御部Ｓへデ−タ０の動作状態表示の信号
を送る場合には、図４のタイムチャ−トＴ３の状態のと
きに，被制御部Ｍの送信信号のレベルを０にする。 す
ると，送信フォトカプラＰ１の入力端の電流は０にな
り，その出力端はオ−プン状態となって電流制御トラン
ジスタＱ１が定電流ダイオ−ドＣＲＤを通して流れる電
流Ｉｄにより導通して，しきい値電流検出トランジスタ
Ｑ２が動作し，定電流状態となる。 制御部Ｓの送受信
回路１１も直列にル−プ接続してあるので，制御部Ｍと
同様にしきい値電流検出トランジスタＱ２が動作し定電
流状態となり，受信フォトカプラＰ２の出力端の受信信
号は共にレベル１から０に変化する。つまり，被制御部
Ｍの送信信号をレベル０にすると，制御部Ｓの受信信号
もレベル０となり，これによって被制御部Ｍから制御部
Ｓへデ−タ０の動作状態の表示信号を送信することがで
きる。以上のように，通信可能状態において被制御部Ｍ
の送信信号のレベルの変化が被制御部Ｍ及び制御部Ｓの
受信信号のレベルの変化に対応するので，被制御部Ｍか
ら制御部Ｓへ設備機器の動作状態の表示信号（デ−タ）
を確実に伝送することができる。FIG. 3 is a waveform diagram of the alternating current separated into the power supply current Ib and the communication current Ia with respect to the alternating voltage E of the AC power supply E, and FIG. 4 is the transmission signal and the communication current in the communication cycle of FIG. FIG. 3 is a time chart of a received signal and a received signal. The operation of signal communication and power supply between the controlled section M and the control section S will be described based on this figure. AC
When the alternating current of the power supply is in the communication cycle of FIG. 3 and in the state of T1 of FIG. 4, the transmission signals of the controlled unit M and the control unit S are still in the waiting state and both are at level 0. The voltage of AC power supply E is 0
When the voltage gradually rises from the cross, the communication current Ia flows to the base of the current control transistor Q1 through the constant current diode CRD of the transmission / reception circuit 11 of the control section S, the current control transistor Q1 becomes conductive, and as the voltage rises. , The current increases, but when the potential generated across the threshold current detection resistor R becomes about 1.8V which is the sum of the base-emitter forward voltage and the photocoupler input voltage, the threshold current detection is performed. A current flows through the base of the transistor Q2 to operate, the base current of the current control transistor Q1 is limited to a constant current, and the current Id flowing through the constant current diode CRD is also constant. Most of the current Id flows to the input end of the reception photocoupler P2, and the reception signals at the output end both change from level 1 to 0, and both the controlled unit M and the control unit S side are in the communicable state. I understand. Next, when the state of the time chart T2 is reached, the level of the transmission signal to the transmission photocoupler P1 is set to 1 in order to transmit the display signal (data 1) of the operating state of the equipment from the controlled unit M. , A current flows through the input end of the transmission photocoupler P1 and its output end is short-circuited, and the base and emitter of the current control transistor Q1 are also short-circuited, so that the current control transistor Q1 is OF
F, and the current flowing through the threshold current detection resistor R is only the current Id flowing through the constant current diode CRD. The current Id is set to a value sufficiently smaller than the threshold current Ic, and the threshold current detection transistor Q2
Becomes OFF, the current flowing through the input end of the receiving photocoupler P2 becomes 0, and the level of the received signal at the output end becomes 1.
Becomes At this time, the current Id, which is sufficiently smaller than the threshold current Ic, also flows through the transmission / reception circuit 11 of the control unit S connected in series in a loop. Current detection transistor Q2
Becomes an OFF state, the input end current of the receiving photocoupler P2 becomes 0, and the level of the receiving signal at its output end becomes 1. Therefore, when the transmission signal of the controlled part M is set to level 1, the reception signal of the control part S is also set to level 1, and this causes the signal from the controlled part M to the control part S to display the operating state of the data 1. Can be sent. Next, when a signal for indicating the operating state of the data 0 is sent from the controlled unit M to the control unit S, the level of the transmission signal of the controlled unit M in the state of the time chart T3 in FIG. To 0. Then, the current at the input end of the transmission photocoupler P1 becomes 0, its output end becomes in the open state, and the current control transistor Q1 becomes conductive due to the current Id flowing through the constant current diode CRD, and the threshold value is reached. The current detection transistor Q2 operates and enters a constant current state. Since the transmission / reception circuit 11 of the control unit S is also loop-connected in series, the threshold current detection transistor Q2 operates similarly to the control unit M to enter a constant current state, and the reception signal at the output end of the reception photocoupler P2 is Both change from level 1 to 0. In other words, when the transmission signal of the controlled part M is set to level 0, the reception signal of the control part S also becomes level 0, whereby the display signal of the operating state of data 0 is transmitted from the controlled part M to the control part S. be able to. As described above, in the communication enabled state, the controlled unit M
Since the change in the level of the transmission signal of the control unit corresponds to the change in the level of the reception signal of the controlled unit M and the control unit S, the controlled unit M transmits the display signal (data) of the operating state of the equipment to the control unit S.
Can be reliably transmitted.
【００１２】同様に被制御部Ｍと制御部Ｓは直列にル−
プ接続されており，制御部Ｓの送受信回路１１は被制御
部Ｍの送受信回路１と全く同一であるから、制御部Ｓの
送信信号レベルの変化は前記と同様に制御部Ｓ及び被制
御部Ｍの受信信号レベルの変化に対応することとなり，
これによって制御部Ｓから被制御部Ｍへ設備機器の制御
指令信号（デ−タ）を確実に伝送できる。よって，ＡＣ
電源Ｅの交番電流が通信サイクルの状態では、離れた位
置にある被制御部と制御部との間で，ノイズに強く長距
離伝送が可能な電流伝送の双方向通信が可能となる。Similarly, the controlled part M and the control part S are connected in series.
Since the transmission / reception circuit 11 of the control unit S is exactly the same as the transmission / reception circuit 1 of the controlled unit M, the change of the transmission signal level of the control unit S is similar to the above. It corresponds to the change of the received signal level of M,
As a result, the control command signal (data) of the equipment can be reliably transmitted from the control section S to the controlled section M. Therefore, AC
When the alternating current of the power source E is in a communication cycle, it is possible to perform bidirectional communication of current transmission between a controlled unit and a control unit which are located apart from each other and resistant to noise and capable of long-distance transmission.
【００１３】次に図３のＡＣ電源の交番電流が電源供給
サイクル状態のときの動作説明をする。被制御部Ｍの電
源供給回路２は、送受信回路２１とモノマルチ回路２２
により形成されており、この送受信回路２１は通信線の
短絡電流を検出するために，そのしきい値電流検出抵抗
Ｒを上記通信サイクルで利用される送受信回路１のしき
い値電流検出抵抗Ｒの値より１桁以上小さくしてある。
しかしてＡＣ電源Ｅの電圧が０クロスより負の方向へ電
位が上昇すると、送受信回路２１の定電流ダイオ−ドＣ
ＲＤを通して電流制御トランジスタＱ１のベ−スへ電流
が流れ同トランジスタがＯＮする。 このときしきい値
電流検出抵抗Ｒは短絡電流検出の値に設定してあるの
で，制御部Ｓへ電源を供給する電流Ｉｂでは，しきい値
電流検出トランジスタＱ２は動作しない。よってそれに
よる電流制限は働かず制御部Ｓの安定化電源回路３へ電
源が十分に供給される。ここで何らかの原因でル−プ電
線４同志が短絡した場合には、送受信回路２１の電流検
出抵抗Ｒに短絡電流が流れるため，しきい値電流検出ト
ランジスタＱ２が動作し，これによって電流制御トラン
ジスタＱ１のベ−ス電流が制限され、短絡電流は一定の
電流に制限される。 そして短絡電流が制限されると，
同時に受信フォトカプラＰ２が動作して，モノマルチ回
路２２をトリガ−し，その出力は一定時間，つまり短絡
電流制限による電流制御トランジスタＱ１が発熱破損し
ない十分な時間，送信フォトカプラＰ１の入力端をドラ
イブして電流制御トランジスタＱ１のベ−ス・エミッタ
間を短絡し続け，短絡電流制限の不飽和発熱によるトラ
ンジスタ破損を防止する。モノマルチ回路２２をトリガ
−して一定時間後，短絡の状態であれば，ＡＣ電源Ｅの
交番電流が電源供給サイクル状態にかかると，再度上記
短絡保護動作を繰り返し，短絡状態が解除されると，上
記電源供給動作に入り正常な状態に復帰する。以上のよ
うに送受信回路とモノマルチ回路の組み合わせで，短絡
保護と電源供給への自動復帰機能を有する電源供給回路
が実現できる。Next, the operation when the alternating current of the AC power supply of FIG. 3 is in the power supply cycle state will be described. The power supply circuit 2 of the controlled part M includes a transmission / reception circuit 21 and a mono-multi circuit 22.
In order to detect the short circuit current of the communication line, the transmission / reception circuit 21 uses the threshold current detection resistor R of the threshold current detection resistor R of the transmission / reception circuit 1 used in the above communication cycle. It is smaller than the value by one digit or more.
Then, when the voltage of the AC power source E rises in the negative direction from the 0 cross, the constant current diode C of the transmission / reception circuit 21.
A current flows through the base of the current control transistor Q1 through RD, and the transistor is turned on. At this time, since the threshold current detection resistor R is set to the value for detecting the short circuit current, the threshold current detection transistor Q2 does not operate with the current Ib that supplies power to the control unit S. Therefore, the current limitation by that does not work, and the stabilized power supply circuit 3 of the control unit S is sufficiently supplied with power. If the loop electric wires 4 are short-circuited to each other for some reason, a short-circuit current flows in the current detection resistor R of the transmission / reception circuit 21, so that the threshold current detection transistor Q2 operates, which causes the current control transistor Q1. Base current is limited and the short circuit current is limited to a constant current. And when the short circuit current is limited,
At the same time, the receiving photocoupler P2 operates to trigger the mono-multi circuit 22, and its output is kept at the input end of the transmitting photocoupler P1 for a certain period of time, that is, for a sufficient period of time during which the current control transistor Q1 is not damaged by heat generation due to the short circuit current limitation. The current control transistor Q1 is driven to continue short-circuiting between the base and emitter to prevent transistor damage due to unsaturated heat generation due to short-circuit current limitation. If the AC power source E is in a short-circuit state after a certain period of time has elapsed since the mono-multi circuit 22 was triggered and the alternating current of the AC power supply E is in a power supply cycle state, the short-circuit protection operation is repeated again and the short-circuit state is released. , The above power supply operation is started and the normal state is restored. As described above, a power supply circuit having a short-circuit protection function and an automatic return function to the power supply can be realized by combining the transceiver circuit and the mono-multi circuit.
【００１４】[0014]
【発明の効果】本発明は上記の構成となしたので、被制
御部と制御部間に供給されるＡＣ電源の交番電流をその
向きの相違によって電源電流と信号の通信電流とに分離
して用いることができ、そのため従来のように通信信号
の電力を大きくすると放射ノイズの発生により制御部へ
の供給電力と伝送距離に制限を受けるということはな
く，電圧変動や外来ノイズに強くモ−タ等の遠方制御を
従来に比し安定して行うことができる。また，被制御部
と制御部間の配線接続構造も，単に両者を１本の電線で
ＡＣ電源に直列にル−プ接続するのみで良く簡潔であ
り、誤配線のおそれもなく，接続の手数も簡易となすこ
とができるので、経済的である。更に電源供給側の被制
御部の電源供給回路を，上記送受信回路とモノマルチ回
路との組み合わせにより形成することによって、通信線
の短絡による過電流の防止を確実に図ることができると
ともに，電源供給への自動復帰機能を併有することがで
きるので、一層安定した遠方制御をなすことができる。Since the present invention has the above-mentioned structure, the alternating current of the AC power supply supplied between the controlled part and the control part is separated into the power supply current and the signal communication current by the difference in the direction. Therefore, when the power of the communication signal is increased as in the conventional case, the power supplied to the control unit and the transmission distance are not limited by the generation of radiation noise, and the motor is strongly resistant to voltage fluctuations and external noise. It is possible to perform distant control such as, for example, more stably than before. Also, the wiring connection structure between the controlled part and the control part is simple, as both are connected in series to the AC power supply in series with a single electric wire, and it is simple. It is economical because it can be done easily. Further, by forming the power supply circuit of the controlled part on the power supply side by combining the transmission / reception circuit and the mono-multi circuit, it is possible to surely prevent the overcurrent due to the short circuit of the communication line and to supply the power. Since it is possible to have an automatic return function to both, it is possible to perform more stable remote control.
【図１】 本発明実施の１例に係る全体構成の系統説明
図。FIG. 1 is a system explanatory diagram of an overall configuration according to an example of implementing the present invention.
【図２】 同上全体構成の接続回路図。FIG. 2 is a connection circuit diagram of the overall configuration of the same.
【図３】 ＡＣ電源の電源電圧Ｅに対する，向きにより
通信電流と電源電流とに分離された交番電流の波形図。FIG. 3 is a waveform diagram of an alternating current, which is separated into a communication current and a power supply current according to a direction with respect to a power supply voltage E of an AC power supply.
【図４】 図３の通信サイクルにおける送受信信号と通
信電流とのタイムチャ−ト図。FIG. 4 is a time chart of a transmission / reception signal and a communication current in the communication cycle of FIG.
Ｅ ＡＣ電源 Ｍ 被制御部 Ｓ 制御部 １，１１，２１ 送受信回路 ２ 電源供給回路 ３ 安定化電源回路 ２２ モノマルチ回路 ４ 電線 Ｘ，Ｙ，Ａ，Ｂ 端子 ｄ１，ｄ２，ｄ３，ｄ４ ダイオ−ド Ｑ１ 電流制御トランジスタ Ｑ２ しきい値電流検出トランジスタ Ｐ１ 送信フォトカプラ Ｐ２ 受信フォトカプラ Ｒ しきい値電流検出抵抗 ＣＲＤ 定電流ダイオ−ド Ｉａ 通信電流 Ｉｂ 電源電流 E AC power supply M Controlled part S Control part 1,11,21 Transmitter / receiver circuit 2 Power supply circuit 3 Stabilized power supply circuit 22 Mono-multi circuit 4 Electric wire X, Y, A, B terminals d1, d2, d3, d4 Diode Q1 current control transistor Q2 threshold current detection transistor P1 transmission photocoupler P2 reception photocoupler R threshold current detection resistor CRD constant current diode Ia communication current Ib power supply current
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5144352AJP2519653B2 (en) | 1993-05-25 | 1993-05-25 | Power supply and communication method and device using one loop-connected electric wire |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5144352AJP2519653B2 (en) | 1993-05-25 | 1993-05-25 | Power supply and communication method and device using one loop-connected electric wire |
| Publication Number | Publication Date |
|---|---|
| JPH06335063Atrue JPH06335063A (en) | 1994-12-02 |
| JP2519653B2 JP2519653B2 (en) | 1996-07-31 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5144352AExpired - LifetimeJP2519653B2 (en) | 1993-05-25 | 1993-05-25 | Power supply and communication method and device using one loop-connected electric wire |
| Country | Link |
|---|---|
| JP (1) | JP2519653B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60229548A (en)* | 1984-04-27 | 1985-11-14 | Toshiba Corp | Serial data transfer device |
| JPH04216297A (en)* | 1990-12-17 | 1992-08-06 | Mitsubishi Electric Corp | Power line communication system |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60229548A (en)* | 1984-04-27 | 1985-11-14 | Toshiba Corp | Serial data transfer device |
| JPH04216297A (en)* | 1990-12-17 | 1992-08-06 | Mitsubishi Electric Corp | Power line communication system |
| Publication number | Publication date |
|---|---|
| JP2519653B2 (en) | 1996-07-31 |
| Publication | Publication Date | Title |
|---|---|---|
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