JPH0521466B2 - - Google Patents
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- Publication number
- JPH0521466B2 JPH0521466B2 JP61255813A JP25581386A JPH0521466B2 JP H0521466 B2 JPH0521466 B2 JP H0521466B2 JP 61255813 A JP61255813 A JP 61255813A JP 25581386 A JP25581386 A JP 25581386A JP H0521466 B2 JPH0521466 B2 JP H0521466B2
- Authority
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- Prior art keywords
- signal
- abnormality
- time
- power outage
- logic level
- Prior art date
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- Expired - Lifetime
Links
- 230000005856 abnormality Effects 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 35
- 238000001514 detection method Methods 0.000 claims description 15
- 230000008054 signal transmission Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Dc Digital Transmission (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Description
【発明の詳細な説明】
[発明の目的]
(産業上の利用分野)
本発明は異常発生信号伝送装置に関し、特に、
送信局において停電発生したとき受信局に対して
停電信号を伝送するのに適用して好適なものであ
る。[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to an abnormality occurrence signal transmission device, and in particular,
This is suitable for application to transmit a power outage signal to a receiving station when a power outage occurs at a transmitting station.
(従来の技術)
従来、送信局において停電異常が発生した場
合、受信局側で、装置誤動作や回線断等の他の異
常と区別できるように停電信号を伝送する伝送装
置が種々提案されている。(Prior Art) Conventionally, various transmission devices have been proposed that transmit a power outage signal when a power outage abnormality occurs at a transmitting station so that the receiving station can distinguish it from other abnormalities such as equipment malfunction or line disconnection. .
例えば、第1に、送信局に停電したときに一定
時間電力を供給できる非常用電源を設け、停電時
に特定パターン発生回路が非常用電源から電力の
供給を受けて、数ビツトによる特定パターンを発
生して受信局側に伝送し、この特定パターンを検
出することにより受信局側で停電を判別するよう
になされた伝送装置が提案されている(特開昭60
−229441号公報)。 For example, first, an emergency power supply is installed at the transmitting station that can supply power for a certain period of time in the event of a power outage, and in the event of a power outage, a specific pattern generation circuit receives power from the emergency power supply and generates a specific pattern of several bits. A transmission device has been proposed in which the receiving station determines a power outage by detecting this specific pattern.
-229441).
しかしながら、この装置によると、数ビツトの
特定パターンを発生するため、その部分を実際上
発振回路、シフトレジスタ、ゲート回路で構成
し、その受信部も実際上、発振回路、シフトレジ
スタ、比較回路等で構成しなければならず、滅多
に発生しない事態のために装置全体の構成が大
型、複雑になつてしまう。 However, according to this device, in order to generate a specific pattern of several bits, that part is actually composed of an oscillation circuit, a shift register, a gate circuit, and the receiving section is also actually composed of an oscillation circuit, a shift register, a comparison circuit, etc. However, due to the rare occurrence of situations, the overall configuration of the device becomes large and complicated.
また、従来、第2に、停電発生時に所定論理レ
ベルのデータのみを補助電源からの供給が続く限
り、伝送することによつて停電信号を伝送する伝
送装置が提案されている。 Furthermore, a second transmission device has been proposed that transmits a power outage signal by transmitting only data at a predetermined logic level as long as the auxiliary power supply continues to supply data at the time of a power outage.
しかし、この方法によると、伝送路に中継器が
介装され、回線断があつたときには、受信局が中
継器から同様に所定論理レベルのデータのみが伝
送されるため、送信局における停電によるもの
か、又は回線断によるものかを受信局において区
別できない。 However, according to this method, a repeater is installed on the transmission path, and when the line is disconnected, the receiving station receives only data at a predetermined logic level from the repeater, so there is no risk of a power outage at the transmitting station. It is not possible at the receiving station to distinguish whether this is due to a disconnection or a disconnection of the line.
(発明が解決しようとする問題点)
上述のように、従来の伝送装置による異常発生
信号(例えば、停電信号)の伝送においては、装
置全体の構成が大型、複雑化し、又は論理レベル
を固定して簡易の構成により伝送しようとする
と、異常発生信号を正確に伝送できないという不
都合があつた。また、送信局の異常なのか、伝送
路の回線断等の異常かが受信局側において区別で
きないという問題点があつた。(Problems to be Solved by the Invention) As mentioned above, when transmitting an abnormality signal (for example, a power outage signal) using a conventional transmission device, the configuration of the entire device is large and complicated, or the logic level is fixed. If an attempt was made to transmit the signal using a simple configuration, there was a problem in that the abnormality signal could not be transmitted accurately. Further, there was a problem in that the receiving station could not distinguish between an abnormality at the transmitting station and an abnormality such as a disconnection of the transmission line.
本発明の目的は、送信局で発生した異常を通知
する異常発生信号を確実に受信局に伝送できる簡
易な構成の異常発生信号伝送装置を提供すること
にある。 SUMMARY OF THE INVENTION An object of the present invention is to provide an abnormality signal transmission device with a simple configuration that can reliably transmit an abnormality signal notifying an abnormality occurring at a transmitting station to a receiving station.
[発明の構成]
(問題点を解決するための手段)
上記目的のを達成するために本発明に係る異常
発生信号伝送装置は、送信局側には、この送信局
に異常が発生した場合に、これを検出して伝送情
報信号の出力を停止する異常検出手段と、補助電
源により動作し、前記伝送情報信号が同一論理レ
ベルを取り得る最長時間よりも長いT1時間幅を
有する一定の論理レベルの信号とこの信号を反転
した信号とを一対とする異常発生信号を繰り返し
受信局に伝送する異常発生信号伝送手段とを備
え、受信局側には、前記T1時間よりも短く、か
つ前記伝送情報信号が同一論理レベルを取り得る
最長時間よりも長いT2時間を計時する計時手段
と、このT2時間内に信号が受信された場合には、
伝送情報信号の受信と判定する一方、T2時間経
過後に少なくとも2回以上、反転を繰り返す信号
を受信した場合に異常発生信号の受信と判定する
判定手段とを備えることを特徴とする。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the abnormality occurrence signal transmission device according to the present invention has a transmitting station that transmits a signal when an abnormality occurs in the transmitting station. , an abnormality detection means that detects this and stops outputting the transmission information signal, and a constant logic level that is operated by an auxiliary power source and has a T1 time width longer than the longest time that the transmission information signal can take the same logic level. and an abnormality occurrence signal transmission means for repeatedly transmitting an abnormality occurrence signal, which is a pair of a signal and a signal obtained by inverting this signal, to a receiving station, and the receiving station side has an abnormality occurrence signal that is shorter than the T1 time and transmits the transmission information. a timing means for timing a T2 time longer than the maximum time during which the signal can assume the same logic level; and if the signal is received within this T2 time;
The present invention is characterized by comprising a determining means that determines that a transmission information signal has been received, and determines that an abnormality occurrence signal has been received when a signal that repeats inversion at least twice after T2 time has elapsed is received.
(作用)
上記構成によれば、送信局側に異常が検出され
ると、伝送情報信号の出力が停止されるととも
に、T1時間幅を有する一定の論理レベルの信号
とこの信号を反転した信号とを一対とする異常発
生信号が繰り返し受信局に伝送される。(Function) According to the above configuration, when an abnormality is detected on the transmitting station side, the output of the transmission information signal is stopped, and a signal of a constant logic level having a time width of T1 and a signal obtained by inverting this signal are output. A pair of abnormality occurrence signals are repeatedly transmitted to the receiving station.
受信局側では、T1時間よりも短く、かつ伝送
情報信号が同一論理レベルを取り得る最長時間よ
りも長いT2時間内に信号が受信された場合には、
伝送情報信号の受信と判定される一方、T2時間
経過後に少なくとも2回以上、反転を繰り返す信
号が受信された場合に異常発生信号が受信された
と判定される。 On the receiving station side, if the signal is received within time T2, which is shorter than time T1 and longer than the maximum time during which the transmitted information signal can have the same logic level,
While it is determined that a transmission information signal has been received, it is determined that an abnormality occurrence signal has been received when a signal that repeats inversion at least twice after T2 time has elapsed.
従つて、伝送路で発生した異常と誤認すること
なく、送信局の異常発生信号を簡単な構成により
確実に受信局に伝送できる。 Therefore, the abnormality occurrence signal from the transmitting station can be reliably transmitted to the receiving station with a simple configuration without being mistaken for an abnormality occurring in the transmission path.
(実施例)
以下、添付図面を参照しながら本発明の一実施
例を詳述する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.
第1図において、送信局1と受信局2とは伝送
路3を介して接続されている。送信局1は伝送情
報信号INFを出力する情報送信部4と、コンデン
サでなる補助電源5から電源供給を受けて停電信
号を発生する停電信号発生部6とを具える。情報
送信部4からの伝送情報信号INF及び停電信号発
生部6からの停電信号STPは、スイツチ回路7
を介して選択されて複流送出部8に与えられ、所
定レベルの複流信号に変換されて伝送路3に出力
される。スイツチ回路7は、常時は情報送信部4
側に接続されており、主電源の停電を検出する停
電検出部9からの検出出力によつて停電信号発生
部6側に切り換わるようになされている。 In FIG. 1, a transmitting station 1 and a receiving station 2 are connected via a transmission line 3. In FIG. The transmitting station 1 includes an information transmitting section 4 that outputs a transmission information signal INF, and a power outage signal generating section 6 that receives power from an auxiliary power source 5 made of a capacitor and generates a power outage signal. The transmission information signal INF from the information transmitter 4 and the power outage signal STP from the power outage signal generator 6 are sent to the switch circuit 7.
is selected and given to the double-current sending unit 8, converted into a double-current signal of a predetermined level, and output to the transmission line 3. The switch circuit 7 is normally connected to the information transmitter 4
It is connected to the power outage signal generating section 6 side, and is switched to the power outage signal generating section 6 side in response to a detection output from a power outage detection section 9 that detects a power outage of the main power source.
停電検出部9及びスイツチ回路7は、例えば、
電源供給時に接点を情報送信部4側に付勢するリ
レー及びその接点で構成することができる。 The power outage detection unit 9 and the switch circuit 7 are, for example,
It can be configured with a relay that energizes the contact toward the information transmitting unit 4 side when power is supplied and its contact.
停電信号発生部6は、所定時間T1を計時する
タイマ6aと、所定時間T1ごとに論理レベルを
反転する反転回路6bとで構成され、周期が所定
時間T1の2倍のパルス信号を停電信号STPとし
て発生する。具体的には第2図に示すように演算
増幅器OP1を用いた非マルチバイブレータ回路に
よりタイマ6aと反転回路6bとが融合された停
電信号発生部6を実現できる。 The power outage signal generating section 6 is composed of a timer 6a that measures a predetermined time T1, and an inversion circuit 6b that inverts the logic level every predetermined time T1, and generates a pulse signal with a period twice the predetermined time T1 as a power outage signal STP. occurs as. Specifically, as shown in FIG. 2, a power outage signal generating section 6 in which a timer 6a and an inverting circuit 6b are integrated can be realized by a non-multivibrator circuit using an operational amplifier OP1.
ここで、所定時間T1は伝送情報信号INF伝送
時において、同一論理レベルのデータが続く最も
長い時間より長く選定されている。実際上、キヤ
ラクタ(例えば8ビツト)を区別するため第3図
に示すようにスタートビツト、ストツプビツトを
挿入しているので同一論理レベルが連続するのは
次のキヤラクタに至るまでの時間より長くなるこ
とはなく、所定時間T1はこれ以上に選定する。 Here, the predetermined time T1 is selected to be longer than the longest time during which data at the same logic level continues during transmission of the transmission information signal INF. In practice, a start bit and a stop bit are inserted as shown in Figure 3 to distinguish between characters (e.g. 8 bits), so the same logic level continues for a longer period of time than it takes to reach the next character. Therefore, the predetermined time T1 is selected to be longer than this.
送信局1の上述の構成に対応して受信局2は、
以下の構成を有する。伝送路3から到来する伝送
情報信号INF又は停電信号STPは複流受信部1
0に与えられ、レベル変換された後、情報受信部
11及び停電信号検出部12に与えられる。情報
受信部11は情報送信部4からの伝送情報信号
INFを復調するものであり、停電信号検出部12
は到来信号から停電信号STPを復調検出するも
のである。 Corresponding to the above-described configuration of the transmitting station 1, the receiving station 2 has the following configuration:
It has the following configuration. The transmission information signal INF or power outage signal STP arriving from the transmission path 3 is sent to the double-current receiver 1
0, and after level conversion, is provided to the information receiving section 11 and the power outage signal detecting section 12. The information receiving section 11 receives the transmission information signal from the information transmitting section 4.
It demodulates the INF, and the power outage signal detection unit 12
is to demodulate and detect the power outage signal STP from the incoming signal.
停電信号検出部12は、到来信号のエツジ部分を
抽出するエツジ分離回路12aと、そのエツジ信
号EDを受けてから所定時間T2後に論理レベルを
反転させるリトリカブル可能なタイマ12bと、
タイマ12bからのパルス信号TOUTが2個以
上あることを検出するパルス個数検出回路12c
とで構成されている。The power outage signal detection unit 12 includes an edge separation circuit 12a that extracts the edge portion of the incoming signal, and a retrievable timer 12b that inverts the logic level after a predetermined time T2 after receiving the edge signal ED.
A pulse number detection circuit 12c detects that there are two or more pulse signals TOUT from the timer 12b.
It is made up of.
エツジ分離回路12aは第4図に示すように、
到来信号REC(第5図A)を僅かに積分回路13
で遅延させ、その遅延後の到来信号RECD(第5
図B)と遅延前の到来信号RECとのイクスクル
ーシブオアをイクスクルーシブオア回路14で得
ることにより伝送情報信号INF及び停電信号
STP部分に拘りなくエツジ部分を抽出したエツ
ジ信号ED(第5図C)を得るようになつている。 The edge separation circuit 12a, as shown in FIG.
The incoming signal REC (Fig. 5A) is slightly integrated by the integrator circuit 13.
and the delayed arriving signal RECD (fifth
The exclusive OR circuit 14 obtains the exclusive OR of the arrival signal REC before the delay and the transmission information signal INF and the power outage signal.
The edge signal ED (FIG. 5C) is obtained by extracting the edge portion regardless of the STP portion.
タイマ回路12bは、第6図に示すように、演
算増幅器OP2を用いた非安定マルチバイブレータ
回路により構成される。ここで、所定時間T2は
停電信号STPが同一レベルを取る時間T1より短
く、伝送情報信号INFが同一レベルのビツトを連
続させる最も長い期間より長く選定する。従つ
て、伝送情報信号INFが到来している期間は所定
時間T2を計時する前に次のエツジ信号EDが到来
してトリガされるので、タイマ回路12bは出力
レベルを反転させることがないが、停電信号
STPが到来して来ると、所定時間T2を計時して
出力レベルを反転させる。停電信号STPは所定
時間T1ごとに少なくとも2回以上論理レベルを
反転しているのでタイマ回路12bも所定時間
T1ごとに立上るパルス信号TOUTを出力する。 As shown in FIG. 6, the timer circuit 12b is constituted by an unstable multivibrator circuit using an operational amplifier OP2. Here, the predetermined time T2 is selected to be shorter than the time T1 during which the power outage signal STP remains at the same level, and longer than the longest period during which the transmission information signal INF continues to have bits at the same level. Therefore, during the period in which the transmission information signal INF is arriving, the next edge signal ED arrives and is triggered before the predetermined time T2 is counted, so the timer circuit 12b does not invert its output level; power outage signal
When STP arrives, a predetermined time T2 is counted and the output level is inverted. Since the power outage signal STP inverts its logic level at least twice every predetermined time T1, the timer circuit 12b also inverts the logic level for the predetermined time T1.
Outputs a pulse signal TOUT that rises every T1.
パルス個数検出回路12cは、第7図に示すよ
うに、エツジ信号ED(第8図A)とタイマ12b
の出力信号TOUT(第8図B)とのアンド出力を
得るアンド回路15と、D型フリツプフロツプ回
路16a及び16bを縦続接続したリツプ型カウ
ンタ16とでなり、アンド回路15でタイマ12
bの出力信号の立下りエツジを抽出し、カウンタ
16でその抽出されたエツジ信号の個数をカウン
トするようになされている。ここで、2LSBのD
型フリツプフロツプ回路16bのQ出力16b
(第8図D)は自己のセツト端子に与えられるよ
うになされており、かくして、タイマ12bの出
力信号のパルス数を2個カウントすると、Q出力
Q16bは以後その論理レベルを維持するように
なされている。 As shown in FIG. 7, the pulse number detection circuit 12c detects the edge signal ED (FIG. 8A) and the timer 12b.
It consists of an AND circuit 15 that obtains an AND output with the output signal TOUT (FIG. 8B), and a lip counter 16 in which D-type flip-flop circuits 16a and 16b are connected in cascade.
The falling edge of the output signal b is extracted, and the counter 16 counts the number of extracted edge signals. Here, D of 2LSB
Q output 16b of type flip-flop circuit 16b
(D in FIG. 8) is applied to its own set terminal, so that when the number of pulses of the output signal of timer 12b is counted to 2, the Q output Q16b maintains its logic level from then on. ing.
以上の構成において、送信局1において電源が
正常に供給されていると、情報送信部4から出力
された伝送情報信号INFはスイツチ回路7を介し
て複流送出部8に与えられ、レベル変換された
後、伝送路3に出力され、受信局2において複流
受信部10において取り込み、レベル変換して情
報受信部11に与えられ、復調される。 In the above configuration, when power is normally supplied to the transmitting station 1, the transmission information signal INF output from the information transmitting section 4 is given to the double current transmitting section 8 via the switch circuit 7, and the level is converted. Thereafter, the signal is outputted to the transmission path 3, taken in by the double-current receiving section 10 of the receiving station 2, level-converted, and given to the information receiving section 11, where it is demodulated.
これに対して、第9図Aに示す時点t1で主電源
に停電が発生すると、スイツチ回路7が停電信号
発生部6に接続され、補助電源5が起動されるた
め、スイツチ回路7からは第9図Bに示すよう
に、伝送情報信号INFではなく、時間T1の間、
一方の論理レベル(「L」)をとり、その後時間
T1の間、他方の論理レベル(「H」)をとる停電
信号STPが出力される。 On the other hand, when a power outage occurs in the main power supply at time t1 shown in FIG. As shown in Figure 9B, during time T1, instead of the transmission information signal INF,
Take one logic level (“L”) and then time
During T1, a power outage signal STP that takes the other logic level (“H”) is output.
かくして、受信局2においては、第9図Cに示
すような受信信号RECがエツジ分離回路12A
に与えられ、第9図Dに示すようなエツジ信号
EDがタイマ12dに与えられる。その結果、タ
イマ12bからは時点t1以降、周期T1で立下り
期間T2の出力信号TOUT(第9図E)が出力さ
れ、パルス数検出回路12cは出力信号TOUT
が2個連続した時点t2で停電検出信号DET(第9
図F)を立上げる。 Thus, at the receiving station 2, the received signal REC as shown in FIG. 9C is transmitted to the edge separation circuit 12A.
and the edge signal as shown in Figure 9D.
ED is given to timer 12d. As a result, the timer 12b outputs the output signal TOUT (FIG. 9E) with the cycle T1 and the falling period T2 after time t1, and the pulse number detection circuit 12c outputs the output signal TOUT.
Power outage detection signal DET (9th
Start up Figure F).
このようにして、受信局2に対して送信局1の
停電発生を伝送することができる。 In this way, the occurrence of a power outage at the transmitting station 1 can be transmitted to the receiving station 2.
上述の実施例によれば、停電信号パターンとし
て所定時間T1ごとに論理レベルを反転する単純
なパターンのものを用いたので、発生部6及び復
調部12の構成として簡易なものを用いて停電信
号を伝送することができる。また、論理レベルを
反転して停電信号としたので、中継器等が介装さ
れた場合においても受信局2において停電信号を
検出することができる。 According to the above-described embodiment, a simple pattern in which the logic level is inverted every predetermined time T1 is used as the power outage signal pattern. can be transmitted. Further, since the logic level is inverted to obtain a power outage signal, the power outage signal can be detected at the receiving station 2 even when a repeater or the like is installed.
なお、上述の実施例においては、伝送する異常
発生信号が停電信号であるものを示したが、他の
異常発生信号であつても良く、また、複数の異常
発生信号に異なる所定時間(T1に相当する)を
割り当てて伝送するようにしても良い。 In the above embodiment, the abnormality signal to be transmitted is a power outage signal, but it may be any other abnormality signal. It is also possible to allocate and transmit the corresponding information.
また、上述の実施例においては、タイマ6a及
び12bを演算増幅器OP1,OP2を用いた非安定
マルチバイブレータで構成したものを示したが、
第10図及び第11図に示すように水晶発振器
Xtal1,Xtal2を用いた原発振器20,21によ
る発振出力をカウンタ22,23によつて分周し
て所定時間T1,T2を形成するようにしても良
い。この場合、タイマ12bはリトリガブルであ
るので、カウンタ23のリセツト端子にエツジ信
号EDを与えることを要する。 Furthermore, in the above embodiment, the timers 6a and 12b were configured with unstable multivibrators using operational amplifiers OP1 and OP2, but
Crystal oscillator as shown in Figures 10 and 11
The oscillation outputs from the original oscillators 20 and 21 using Xtal1 and Xtal2 may be divided by the counters 22 and 23 to form the predetermined times T1 and T2. In this case, since the timer 12b is retriggerable, it is necessary to apply the edge signal ED to the reset terminal of the counter 23.
[発明の効果]
以上説明したように本発明によれば、簡易な装
置構成により、送信局で発生した異常を通知する
異常発生信号を、伝送路で発生した異常と誤認さ
せることなく確実に受信局に伝送できる。[Effects of the Invention] As explained above, according to the present invention, with a simple device configuration, an abnormality occurrence signal that notifies an abnormality that has occurred in a transmitting station can be reliably received without being mistaken as an abnormality that has occurred in a transmission path. It can be transmitted to the station.
第1図は本発明による異常発生信号伝送装置の
一実施例を示すブロツク図、第2図はその停電信
号発生部6の詳細構成を示す接続図、第3図は所
定時間T1の説明に供する略線図、第4図はエツ
ジ分離回路12aの詳細構成を示す接続図、第5
図はその各部タイミングチヤート、第6図はタイ
マ12bの詳細構成を示す接続図、第7図はパル
ス数検出回路12cの詳細構成を示すブロツク
図、第8図はその各部タイミングチヤート、第9
図は第1図の伝送装置の各部タイミングチヤー
ト、第10図及び第11図はそれぞれタイマ6a
及び12bの他の例を示すブロツク図である。
1……送信局、2……受信局、3……伝送路、
5……補助電源、6……停電信号発生部、7……
スイツチ回路、9……停電検出部、12……停電
信号検出部。
FIG. 1 is a block diagram showing an embodiment of the abnormality signal transmission device according to the present invention, FIG. 2 is a connection diagram showing the detailed configuration of the power outage signal generating section 6, and FIG. 3 is for explaining the predetermined time T1. A schematic diagram, FIG. 4 is a connection diagram showing the detailed configuration of the edge separation circuit 12a, and FIG.
6 is a connection diagram showing the detailed configuration of the timer 12b, FIG. 7 is a block diagram showing the detailed configuration of the pulse number detection circuit 12c, FIG. 8 is a timing chart of each part, and FIG.
The figure is a timing chart of each part of the transmission device in Figure 1, and Figures 10 and 11 are each a timer 6a.
and 12b is a block diagram showing another example. 1... Transmitting station, 2... Receiving station, 3... Transmission line,
5... Auxiliary power supply, 6... Power outage signal generator, 7...
Switch circuit, 9...Power failure detection unit, 12...Power failure signal detection unit.
Claims (1)
出して伝送情報信号の出力を停止する異常検出手
段と、 補助電源により動作し、前記伝送情報信号が同
一論理レベルを取り得る最長時間よりも長いT1
時間幅を有する一定の論理レベルの信号とこの信
号を反転した信号とを一対とする異常発生信号を
繰り返し受信局に伝送する異常発生信号伝送手段
と、を備え、 受信局側には、 前記T1時間よりも短く、かつ前記伝送情報信
号が同一論理レベルを取り得る最長時間よりも長
いT2時間を計時する計時手段と、 このT2時間内に信号が受信された場合には、
伝送情報信号の受信と判定する一方、T2時間経
過後に少なくとも2回以上、反転を繰り返す信号
を受信した場合に異常発生信号の受信と判定する
判定手段と、 を備えることを特徴とする異常発生信号伝送装
置。[Claims] 1. On the transmitting station side, if an abnormality occurs in the transmitting station, an abnormality detection means detects the abnormality and stops outputting the transmission information signal, and the abnormality detection means is operated by an auxiliary power source and T1 longer than the maximum time that an information signal can have the same logic level
an abnormality occurrence signal transmission means for repeatedly transmitting an abnormality occurrence signal, which is a pair of a signal of a fixed logic level having a time width and a signal obtained by inverting this signal, to a receiving station; a timer for timing T2 time which is shorter than time and longer than the maximum time during which the transmission information signal can take the same logic level; and when a signal is received within this T2 time,
An abnormality occurrence signal characterized by comprising: determination means that determines that a transmission information signal has been received, and determines that an abnormality occurrence signal has been received when a signal that repeats inversion at least twice after T2 time has elapsed is received. Transmission device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61255813A JPS63110846A (en) | 1986-10-29 | 1986-10-29 | Abnormality generating signal transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61255813A JPS63110846A (en) | 1986-10-29 | 1986-10-29 | Abnormality generating signal transmitter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63110846A JPS63110846A (en) | 1988-05-16 |
JPH0521466B2 true JPH0521466B2 (en) | 1993-03-24 |
Family
ID=17283980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61255813A Granted JPS63110846A (en) | 1986-10-29 | 1986-10-29 | Abnormality generating signal transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63110846A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02100550A (en) * | 1988-10-07 | 1990-04-12 | Kyowa Electron Instr Co Ltd | Reset circuit in measurement data processing/ communication equipment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201557A (en) * | 1983-04-28 | 1984-11-15 | Matsushita Electric Ind Co Ltd | Transmission and reception system |
-
1986
- 1986-10-29 JP JP61255813A patent/JPS63110846A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201557A (en) * | 1983-04-28 | 1984-11-15 | Matsushita Electric Ind Co Ltd | Transmission and reception system |
Also Published As
Publication number | Publication date |
---|---|
JPS63110846A (en) | 1988-05-16 |
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