JPH09293440A - Relay control method - Google Patents
Relay control methodInfo
- Publication number
- JPH09293440A JPH09293440A JP10506296A JP10506296A JPH09293440A JP H09293440 A JPH09293440 A JP H09293440A JP 10506296 A JP10506296 A JP 10506296A JP 10506296 A JP10506296 A JP 10506296A JP H09293440 A JPH09293440 A JP H09293440A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- microcomputer
- contact welding
- contact
- contacts
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
Landscapes
- Relay Circuits (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はマイクロコンピュー
タで継電器を駆動する際に利用される継電器の制御方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay control method used when a microcomputer drives a relay.
【０００２】[0002]
【従来の技術】マイクロコンピュータで継電器の駆動を
制御する場合に、継電器の接点に溶着が起こってもマイ
クロコンピュータの制御信号を衝撃化することにより、
制御回路が自力で接点の溶着を解除するという技術が従
来より提案されており、その例として特開平３−４５８
５３号公報に開示されたものを図７、図８を用いて以下
に説明する。2. Description of the Related Art When controlling the drive of a relay with a microcomputer, even if welding occurs at the contact of the relay, the control signal of the microcomputer is shocked to
Conventionally, a technique has been proposed in which a control circuit releases the welding of contacts by itself, and an example thereof is Japanese Patent Laid-Open No. 3-458.
The one disclosed in Japanese Patent No. 53 will be described below with reference to FIGS. 7 and 8.
【０００３】図７は前記公報により開示された技術の回
路図であり、同図において１はマイクロコンピュータ、
１ａはマイクロコンピュータ１の電源入力（ＶＤＤ）、
６は負荷駆動用電源、１ｂは負荷駆動用電源６と共通ラ
インとした電源入力（ＶＳＳ）、２は継電器、１ｃは継
電器２の制御出力、３は継電器駆動用トランジスタ、４
ａ，４ｂは継電器２の接点、５は負荷である。FIG. 7 is a circuit diagram of the technique disclosed in the above publication, in which 1 is a microcomputer,
1a is a power input (VDD) of the microcomputer 1,
6 is a power source for driving the load, 1b is a power input (VSS) on a common line with the power source for driving the load 2, 2 is a relay, 1c is a control output of the relay 2, 3 is a transistor for driving the relay, 4
a and 4b are contacts of the relay 2 and 5 is a load.
【０００４】マイクロコンピュータ１の継電器２の制御
出力１ｃは継電器駆動用トランジスタ３を介して継電器
２に接続され、継電器２の接点４ａは負荷５と負荷駆動
用電源６に接続され、接点４ｂは接点４ａが溶着した場
合の接点溶着検出用入力信号１ｄとしてマイクロコンピ
ュータ１に接続された構成を示している。The control output 1c of the relay 2 of the microcomputer 1 is connected to the relay 2 via the transistor 3 for driving the relay, the contact 4a of the relay 2 is connected to the load 5 and the power source 6 for driving the load, and the contact 4b is the contact. 4 shows a configuration in which a contact welding detection input signal 1d when 4a is welded is connected to the microcomputer 1.
【０００５】図８は上記図７の構成による回路の動作の
タイミングチャートであり、モード１は継電器２の正常
動作状態を示し、マイクロコンピュータ１の継電器２の
制御出力信号１ｃが継電器駆動用トランジスタ３を介し
て継電器２に与えられる系において、継電器２の制御出
力信号１ｃと継電器２のコイル電圧の各々の信号波形が
同一であり、継電器２の動作遅れ時間を無視すれば負荷
動作の信号波形も前記継電器２の制御出力信号１ｃと前
記継電器２のコイル電圧の信号波形と同じになり、マイ
クロコンピュータ１の継電器２の制御出力信号１ｃはそ
のまま負荷５の動作時間と考えることができる。FIG. 8 is a timing chart of the operation of the circuit configured as shown in FIG. 7. Mode 1 shows the normal operation state of the relay 2 and the control output signal 1c of the relay 2 of the microcomputer 1 is the transistor 3 for driving the relay. In the system given to the relay 2 via the relay, the signal waveforms of the control output signal 1c of the relay 2 and the coil voltage of the relay 2 are the same, and if the operation delay time of the relay 2 is ignored, the signal waveform of the load operation is also The control output signal 1c of the relay 2 and the signal waveform of the coil voltage of the relay 2 become the same, and the control output signal 1c of the relay 2 of the microcomputer 1 can be considered as the operating time of the load 5 as it is.
【０００６】モード２は継電器２の接点溶着と溶着解除
の動作状態を示し、継電器２が正常動作状態であればマ
イクロコンピュータ１の継電器２の制御出力信号１ｃが
ＯＮからＯＦＦに切り替わると継電器２のコイル電圧は
ＯＦＦになり負荷５もＯＦＦになるが、接点が溶着した
場合は図７で、接点４ａから接点４ｂに切り替わらず、
接点はＯＮの状態のままとなっている。Mode 2 shows the operating state of contact welding and unwelding of the relay 2. If the control output signal 1c of the relay 2 of the microcomputer 1 is switched from ON to OFF when the relay 2 is in a normal operating state, the mode of the relay 2 is changed. Although the coil voltage is turned off and the load 5 is also turned off, when the contact is welded, the contact 4a is not switched to the contact 4b in FIG.
The contact remains on.
【０００７】従って接点溶着検出用の接点４ｂからはマ
イクロコンピュータ１の電源入力（ＶＳＳ）１ｂに信号
が入らないので（マイクロコンピュータ１は）接点４ａ
が溶着状態と判断し、マイクロコンピュータ１の継電器
２の制御出力信号１ｃは継電器２の接点溶着を解除させ
る以下のようなシーケンスに切り替わる。Therefore, no signal is input to the power source input (VSS) 1b of the microcomputer 1 from the contact welding detection contact 4b (in the microcomputer 1).
Is judged to be in the welding state, and the control output signal 1c of the relay 2 of the microcomputer 1 is switched to the following sequence for releasing the contact welding of the relay 2.
【０００８】つまり図８のＡ点で接点溶着を検出した
後、Ｂ点でマイクロコンピュータ１の継電器２の制御出
力信号１ｃで１０ｍｓｅｃから５００ｍｓｅｃの衝撃パ
ルスを継電器２のコイルに与えるとその衝撃が接点溶着
部に伝わり、Ｃ点で接点溶着は解除され、継電器２は正
常状態に復帰する。That is, when contact welding is detected at the point A in FIG. 8 and a shock output pulse of 10 msec to 500 msec is applied to the coil of the relay 2 by the control output signal 1c of the relay 2 of the microcomputer 1 at the point B, the shock is applied to the contact. It is transmitted to the welded portion, the contact welding is released at point C, and the relay 2 returns to the normal state.
【０００９】モード３はモード２のように１回の衝撃パ
ルスで継電器２の接点溶着が解除されない場合の継電器
２の接点溶着と溶着解除の動作状態を示し、モード２と
同じようにＡ１点で接点溶着を検出後Ｂ１点でマイクロ
コンピュータ１の継電器２の制御出力信号１ｃで１回目
の衝撃パルスを与えるが、１回目で接点溶着が解除され
ない場合はＢ２点で２回目の衝撃パルスを与え、２回目
でも接点溶着が解除されない場合はＢ３点で３回目の衝
撃パルスを与えるというように、接点溶着が解除される
までマイクロコンピュータ１から繰り返し衝撃パルスの
継電器２の制御出力信号１ｃを接点溶着部に与え、Ｃｎ
点で接点溶着が解除され、継電器２は正常状態に復帰す
るというように構成されたものである。[0009] Mode 3 shows the operation state of contact welding and de-welding of the relay 2 when the contact welding of the relay 2 is not released by one shock pulse like the mode 2, and like the mode 2, at A1 point. After the contact welding is detected, the first impact pulse is given at the B1 point by the control output signal 1c of the relay 2 of the microcomputer 1. However, if the contact welding is not released at the first time, the second impact pulse is given at the B2 point, When the contact welding is not canceled even at the second time, the third impact pulse is given at the point B3, and the control output signal 1c of the relay 2 of the shock pulse is repeatedly applied from the microcomputer 1 until the contact welding is canceled. To Cn
The contact welding is released at the points, and the relay 2 returns to the normal state.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら上記従来
の構成では、接点微溶着によるトラブルの防止には効果
があるが、接点４ａ，４ｂの寿命末期での接点摩耗や接
点微溶着による何等かの不具合を事前に確認できず、発
覚後にメンテナンス処理することが通例になっていたば
かりでなく、機器本体の破損につながる場合もあり課題
となっていた。However, although the above-mentioned conventional structure is effective in preventing the trouble due to the slight contact welding, the contact wear at the end of the life of the contacts 4a and 4b and some troubles due to the slight contact welding. It was not always possible to confirm in advance, and it was not only customary to carry out maintenance processing after detection, but there was also the problem that it could lead to damage to the equipment body.
【００１１】本発明はこのような従来の課題を解決し、
継電器の接点寿命末期での接点摩耗や接点微溶着による
摩耗故障の発生をマイクロコンピュータにより事前に予
知して、事前警告表示や事前警告信号を出力して継電器
を強制停止させ、安全でかつ信頼性の高い継電器の制御
方法を提供することを目的とするものである。The present invention solves such a conventional problem,
A microcomputer is used to predict in advance the occurrence of contact wear at the end of the contact life of the relay and wear failure due to slight welding of the contact, and a pre-warning display or pre-warning signal is output to forcibly stop the relay, ensuring safe and reliable operation. It is an object of the present invention to provide a relay control method with high reliability.
【００１２】[0012]
【課題を解決するための手段】この課題を解決するため
に本発明による継電器の制御方法は、継電器の接点溶着
を検出し、かつその信号をマイクロコンピュータの入力
とする接点溶着検出入力手段と、接点溶着時にマイクロ
コンピュータの継電器制御信号を短いパルス信号に切り
替える継電器制御手段と、前記短いパルスの発生数を数
える第１のカウンタ手段と、前記継電器が動作する回数
を数える第２のカウンタ手段と、前記第１及び第２のカ
ウンタ手段で数えた結果をマイクロコンピュータで処理
する演算処理手段と、その演算結果で前記継電器の制御
信号を停止させる強制停止手段からなる方法としたもの
である。In order to solve this problem, a relay control method according to the present invention comprises a contact welding detection input means for detecting the contact welding of the relay and using the signal as an input to a microcomputer. A relay control means for switching the relay control signal of the microcomputer to a short pulse signal at the time of contact welding, a first counter means for counting the number of occurrences of the short pulse, and a second counter means for counting the number of times the relay operates. The method comprises an arithmetic processing means for processing the results counted by the first and second counter means by a microcomputer and a forced stopping means for stopping the control signal of the relay according to the arithmetic result.
【００１３】この本発明によれば、マイクロコンピュー
タにより継電器の接点が寿命末期での摩耗故障に至る前
に摩耗故障の発生を予知することができ、警告手段によ
る機器本体のメンテナンス時期の報知や継電器を停止さ
せる強制停止手段により、突発故障や機器本体の破損等
が回避できる。According to the present invention, the microcomputer can predict the occurrence of wear failure before the contact of the relay reaches the wear failure at the end of its life, and the warning means notifies the maintenance time of the equipment main body and the relay. With the forced stop means for stopping, it is possible to avoid a sudden failure, damage to the device body, and the like.
【００１４】[0014]
【発明の実施の形態】本発明の請求項１に記載の発明
は、継電器の接点溶着を検出し、かつその信号をマイク
ロコンピュータの入力とする接点溶着検出入力手段と、
接点溶着時にマイクロコンピュータの継電器制御信号を
短いパルス信号に切り替える継電器制御手段と、前記短
いパルス信号の発生数を数える第１のカウンタ手段と、
前記継電器が動作する回数を数える第２のカウンタ手段
と、前記第１及び第２のカウンタ手段で数えた結果をマ
イクロコンピュータで処理する演算処理手段と、その演
算結果で前記継電器の制御信号を停止させる強制停止手
段からなる方法としたものであり、継電器の接点寿命末
期での摩耗故障の発生を事前に予知し、継電器を強制的
に停止させることができるという作用を有する。BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises contact welding detection input means for detecting contact welding of a relay and using the signal as an input to a microcomputer.
Relay control means for switching the relay control signal of the microcomputer to a short pulse signal at the time of contact welding, and a first counter means for counting the number of the short pulse signals generated,
A second counter means for counting the number of times the relay operates, an arithmetic processing means for processing a result counted by the first and second counter means by a microcomputer, and a control signal for the relay stopped by the arithmetic result. The method includes a forced stop means for causing the relay to have a function of predicting the occurrence of a wear failure at the end of the contact life of the relay in advance and forcibly stopping the relay.
【００１５】請求項２に記載の発明は、請求項１記載の
発明において、マイクロコンピュータで処理した演算結
果によりマイクロコンピュータが継電器の末期症状と判
断した場合に警告を発する警告表示手段、又は警告音発
生手段を設けた方法としたものであり、継電器の接点寿
命末期での摩耗故障の発生を事前に予知し、機器本体の
メンテナンス時期を表示又は警告等で報知させることが
できるという作用を有する。According to a second aspect of the present invention, in the first aspect of the invention, a warning display means or a warning sound for issuing a warning when the microcomputer judges that it is the terminal symptom of the relay based on the calculation result processed by the microcomputer. This is a method in which the generation means is provided, and has an effect that it is possible to predict in advance the occurrence of a wear failure at the end of the contact life of the relay, and to notify the maintenance time of the device body by displaying or warning.
【００１６】請求項３に記載の発明は、請求項１または
２記載の発明において、継電器を強制停止させた状態を
記憶させる強制停止記憶手段を設けた方法としたもので
あり、万が一マイクロコンピュータの電源が一時的に切
られたり、リセット等された場合にマイクロコンピュー
タが判断した強制停止状態あるいは末期症状警告報知状
態をコンデンサに記憶し、再通電、再スタート時にも前
記状態を確保できるという作用を有する。According to a third aspect of the present invention, there is provided a method according to the first or second aspect of the present invention, in which a forced stop storage means for storing a state in which the relay is forcibly stopped is provided. When the power is temporarily cut off or reset, the microcomputer stores the forced stop state or the terminal symptom warning notification state in the capacitor so that the state can be maintained even when the power is turned on or restarted again. Have.
【００１７】以下、本発明の実施の形態について、図１
から図６を用いて説明する。 （実施の形態１）図１は本発明の第１の実施の形態にお
ける継電器の制御方法を示す基本回路図であり、図１に
おいて、２１はマイクロコンピュータ、２１ａはマイク
ロコンピュータ２１の電源入力（ＶＤＤ）、６は負荷駆
動用電源、２１ｂは負荷駆動用電源６と共通ラインとし
た電源入力（ＶＳＳ）、２は継電器、２１ｃは継電器２
の制御出力、３は継電器駆動用トランジスタ、４ａ，４
ｂは継電器２の接点、５は負荷、７は直流電源（ＶＤ
Ｄ）である。Hereinafter, an embodiment of the present invention will be described with reference to FIG.
From now on, description will be made with reference to FIG. (Embodiment 1) FIG. 1 is a basic circuit diagram showing a control method of a relay according to a first embodiment of the present invention. In FIG. 1, 21 is a microcomputer, 21a is a power input (VDD ), 6 is a power source for driving the load, 21b is a power source input (VSS) common to the power source for driving the load 6, 2 is a relay, 21c is a relay 2
Control output, 3 is a relay drive transistor, 4a, 4
b is a contact of the relay 2, 5 is a load, 7 is a DC power source (VD
D).
【００１８】マイクロコンピュータ２１の継電器２の制
御出力２１ｃは継電器駆動用トランジスタ３を介して継
電器２に接続され、継電器２の接点４ａは負荷５と負荷
駆動用電源６に接続され、接点４ｂは接点４ａが溶着し
た場合の接点溶着検出用入力信号２１ｄとしてマイクロ
コンピュータ２１に接続された構成である。The control output 21c of the relay 2 of the microcomputer 21 is connected to the relay 2 via the relay driving transistor 3, the contact 4a of the relay 2 is connected to the load 5 and the load driving power source 6, and the contact 4b is a contact. 4a is connected to the microcomputer 21 as a contact welding detection input signal 21d when the welding is performed.
【００１９】図２は同実施の形態１における接点溶着検
出処理ルーチンのフローチャートであり、図２により以
下に詳細な動作を説明する。FIG. 2 is a flowchart of the contact welding detection processing routine in the first embodiment, and the detailed operation will be described below with reference to FIG.
【００２０】まず、継電器駆動出力がＯＮ状態かＯＦＦ
状態かをチェックし、ＯＮ状態であれば検出領域外のた
め、接点溶着検出処理ルーチンを終了する。First, the relay drive output is ON or OFF
If it is in the ON state, the contact welding detection processing routine ends.
【００２１】ＯＦＦであれば次のステップで接点溶着の
有無を接点の開閉状態でチェックし、開いていれば正常
ルーチンへ戻し、閉じていれば接点溶着が発生している
と判断し、衝撃パルスカウンタＭに１をプラスしてＭに
戻し、継電器２のコイル信号に衝撃パルスを１回加えて
再度接点が開いたか否かを確認する。開かない場合はま
だ接点溶着が外れていないと判断し、外れるまで衝撃パ
ルスを継電器２のコイルに印加する。If it is OFF, the presence or absence of contact welding is checked in the next step by checking the open / closed state of the contact. If it is open, it returns to the normal routine. If it is closed, it is determined that contact welding has occurred, and an impact pulse is generated. The counter M is incremented by 1 and returned to M, and a shock pulse is added once to the coil signal of the relay 2 to confirm whether or not the contact is opened again. If it does not open, it is determined that the contact welding has not been removed, and a shock pulse is applied to the coil of the relay 2 until it is removed.
【００２２】途中で接点溶着が外れた場合は接点溶着回
数が１回目か否かを判断し、１回目の場合は継電器２の
正常に動作した回数を数えるカウンタＮをクリアし、接
点溶着検出ルーチンを終了する。２回目の場合は接点溶
着検出処理ルーチンへ再度戻ってきて、前回と同様に接
点溶着有りと判断したら、衝撃パルスカウンタＭの積算
数に１をプラスしてＭに戻し継電器２に衝撃パルスを加
える。If the contact welding is removed during the process, it is judged whether or not the number of times of contact welding is the first time, and if it is the first time, the counter N for counting the number of times the relay 2 has normally operated is cleared, and the contact welding detection routine is performed. To finish. In the case of the second time, the process returns to the contact welding detection processing routine again, and if it is determined that there is contact welding as in the previous case, the integrated number of the shock pulse counter M is incremented by 1 and returned to M, and a shock pulse is applied to the relay 2. .
【００２３】接点溶着が外れなければ外れるまで衝撃パ
ルスを印加するのは従来例と同様であるが、接点溶着が
外れると接点溶着回数が１回目か否かを判断するが、今
回は１回目でないのでＮＯとなり、Ｆ←（１／Ｎ）・Ｍ
で示される演算式を実行し、事前に設定したＦ≧５の時
点で接点溶着の前兆と判別される。従って、Ｆが５以上
の場合は接点溶着の前兆ありと判断して、継電器２を強
制停止させてマイクロコンピュータ２１をストップさせ
る。Ｆが５未満の場合は継電器２が正常動作した回数を
数えるカウンタＮをクリアし、接点溶着ルーチンを終了
する。３回目以降も前記と同様なことを繰り返す。If the contact welding does not come off, the impact pulse is applied until it comes off, as in the conventional example. When the contact welding comes off, it is judged whether or not the number of times of contact welding is the first time, but this time it is not the first time. Therefore, it becomes NO and F ← (1 / N) ・ M
The arithmetic expression shown by is executed, and it is determined that it is a precursor of contact welding at a preset time point of F ≧ 5. Therefore, when F is 5 or more, it is determined that there is a sign of contact welding, and the relay 2 is forcibly stopped and the microcomputer 21 is stopped. When F is less than 5, the counter N that counts the number of times the relay 2 has normally operated is cleared, and the contact welding routine ends. The same as above is repeated from the third time onward.
【００２４】このように従来例の構成に加え、継電器２
が正常動作した回数を数えるカウンタ手段と、継電器２
に与えた衝撃パルスの発生回数を数えるカウンタ手段
と、それぞれのカウンタ情報の結果をマイクロコンピュ
ータで処理する演算処理手段を設けたことにより、マイ
クロコンピュータが自己診断を行い、継電器２の接点末
期症状を事前に検出し、接点溶着の故障が発生する前に
継電器２を強制停止させることができるので、機器本体
の突発故障や破損等が回避できるという効果が得られ
る。Thus, in addition to the structure of the conventional example, the relay 2
And a relay means for counting the number of times the
By providing the counter means for counting the number of occurrences of the impact pulse given to the computer and the arithmetic processing means for processing the result of each counter information by the microcomputer, the microcomputer performs self-diagnosis and detects the terminal end symptom of the relay 2. Since the relay 2 can be detected in advance and the relay 2 can be forcibly stopped before the contact welding failure occurs, it is possible to avoid an unexpected failure or damage of the device body.
【００２５】（実施の形態２）図３は本発明の第２の実
施の形態における継電器の制御方法を示す回路図であ
り、前記第１の実施の形態における継電器の制御方法を
示す図１に警告表示手段１２を設けた構成としたもので
あり、図４は同実施の形態２における接点溶着検出処理
ルーチンのフローチャートである。(Embodiment 2) FIG. 3 is a circuit diagram showing a relay control method according to a second embodiment of the present invention. FIG. 1 is a circuit diagram showing the relay control method according to the first embodiment. The warning display means 12 is provided, and FIG. 4 is a flow chart of a contact welding detection processing routine in the second embodiment.
【００２６】図１と重複する符号の説明は省くが、図３
において、２１ｇはマイクロコンピュータ２１の表示駆
動出力信号で、警告表示手段１２の抵抗１０と発光ダイ
オード１１を介して直流電源（ＶＤＤ）７に接続されて
いる。A description of the reference numerals overlapping with those in FIG. 1 is omitted, but FIG.
In the figure, 21 g is a display drive output signal of the microcomputer 21, which is connected to the DC power supply (VDD) 7 via the resistor 10 and the light emitting diode 11 of the warning display means 12.
【００２７】警告表示手段１２は図４の接点溶着処理ル
ーチンのＭ≧１の判断ステップで、Ｍが１以上になった
場合にメンテナンス情報を警告表示手段１２で表示し、
継電器２の保守を知らせる。また同図４のＦ≧５の判断
ステップで、Ｆが５以上になった場合に継電器２の故障
を警告表示手段１２で表示し、継電器２を強制停止させ
てマイクロコンピュータ２１をストップさせるという動
作を行う。The warning display means 12 displays the maintenance information on the warning display means 12 when M becomes 1 or more in the judgment step of M ≧ 1 in the contact welding processing routine of FIG.
Notify maintenance of relay 2. Further, in the determination step of F ≧ 5 in FIG. 4, when F becomes 5 or more, the failure of the relay 2 is displayed by the warning display means 12, and the operation of forcibly stopping the relay 2 and stopping the microcomputer 21 is performed. I do.
【００２８】このように本発明の第２の実施の形態にお
ける継電器の制御方法によれば、接点溶着の故障が発生
する前に継電器を強制停止させると同時に警告表示がで
きるので、機器本体の突発故障や破損等が回避できると
いう効果に加え、機器本体のメンテナンス時期の報知や
継電器２が強制停止状態であることを知らせるという効
果が得られる。As described above, according to the relay control method of the second embodiment of the present invention, the relay can be forcibly stopped and a warning can be displayed at the same time before the contact welding failure occurs. In addition to the effect of avoiding failure or damage, it is possible to obtain the effect of notifying the maintenance time of the device main body and notifying that the relay 2 is in the forced stop state.
【００２９】さらに継電器２の接点溶着の初期症状（Ｍ
が１の時）が検出された段階で、警告表示手段１２によ
り機器本体から継電器のメンテナンス時期を知らせる警
告表示も容易に実現できるものである。Furthermore, the initial symptom of contact welding of the relay 2 (M
When 1) is detected, the warning display means 12 can easily realize a warning display from the device main body to inform the maintenance time of the relay.
【００３０】（実施の形態３）図５は本発明の第３の実
施の形態における継電器の制御方法を示す回路図であ
り、図６はその動作タイミングチャートである。(Third Embodiment) FIG. 5 is a circuit diagram showing a method of controlling a relay according to a third embodiment of the present invention, and FIG. 6 is an operation timing chart thereof.
【００３１】図５において、２１はマイクロコンピュー
タ、２は継電器、３はマイクロコンピュータ２１の継電
器２の制御出力（信号）２１ｃにより継電器２を駆動す
る継電器駆動用トランジスタ、４ａ，４ｂは継電器２の
接点、５は接点４ａに直列に接続されている負荷、６は
負荷駆動用電源、８はダイオード、９は充電用コンデン
サで、接点溶着の入力は継電器２の接点４ｂからマイク
ロコンピュータ２１の接点溶着検出用入力信号２１ｄに
接続されている。ダイオード８は充電用コンデンサ９に
充電された電荷がマイクロコンピュータ２１の出力ポー
ト等からの放電防止用である。In FIG. 5, reference numeral 21 is a microcomputer, 2 is a relay, 3 is a relay driving transistor for driving the relay 2 by the control output (signal) 21c of the relay 2 of the microcomputer 21, and 4a and 4b are contacts of the relay 2. Reference numeral 5 is a load connected in series to the contact 4a, 6 is a power source for driving the load, 8 is a diode, and 9 is a charging capacitor. The contact welding input is from the contact 4b of the relay 2 to the contact welding detection of the microcomputer 21. For input signal 21d. The diode 8 prevents the electric charge charged in the charging capacitor 9 from being discharged from the output port of the microcomputer 21 or the like.
【００３２】上記の構成において、マイクロコンピュー
タ２１は継電器２からの接点溶着検出用入力信号２１ｄ
で接点溶着信号を得るので、直流電源（ＶＤＤ）７が切
れてもこの情報を記憶するためコンデンサ９にダイオー
ド８を介して充電する。直流電源（ＶＤＤ）７が復帰し
たときはコンデンサ９の電荷をマイクロコンピュータ２
１のアナログ／デジタル変換入力（以下、「Ａ／Ｄ入
力」と表現する）２１ｆで判断し、継電器２の制御信号
出力２１ｃで継電器２を強制停止させる。In the above structure, the microcomputer 21 has the contact welding detection input signal 21d from the relay 2.
Since the contact welding signal is obtained at, the capacitor 9 is charged through the diode 8 in order to store this information even when the DC power supply (VDD) 7 is cut off. When the direct current power supply (VDD) 7 is restored, the charge of the capacitor 9 is transferred to the microcomputer 2
The analog / digital conversion input 1 (hereinafter, referred to as “A / D input”) 21f makes a determination, and the control signal output 21c of the relay 2 forcibly stops the relay 2.
【００３３】以下、図６によって動作を説明する。図６
において、横軸のイ点では接点溶着判別結果の出力２１
ｅがＬＯレベルなのでコンデンサ９の両端電圧もＬＯレ
ベルのため、Ａ／Ｄ入力２１ｆはＬＯレベルであり、継
電器２の制御信号出力２１ｃはＨＩレベルで継電器２は
駆動状態を示している。The operation will be described below with reference to FIG. FIG.
At the point a on the horizontal axis, the contact welding determination result output 21
Since e is at the LO level, the voltage across the capacitor 9 is also at the LO level, so the A / D input 21f is at the LO level, the control signal output 21c of the relay 2 is at the HI level, and the relay 2 is in a driving state.
【００３４】次に、ロ点は継電器２の接点溶着判別結果
の出力２１ｅがＨＩレベルとなった点であり、継電器２
の制御信号出力２１ｃは強制停止する。また接点溶着判
別結果の出力２１ｅによりダイオード８を介してコンデ
ンサ９が充電される。この充電電圧が、Ａ／Ｄ入力２１
ｆの判定レベルｄ線を越えたａレベルに達すると記憶領
域に入る。この時マイクロコンピュータ２１のＲＡＭ領
域で構成する記憶フラグがｆ点でセットされる。Next, point B is a point at which the output 21e of the contact welding determination result of the relay 2 becomes HI level.
The control signal output 21c of is forcibly stopped. Further, the output 21e of the contact welding determination result charges the capacitor 9 via the diode 8. This charging voltage is the A / D input 21
When it reaches the level a which exceeds the judgment level d of f, it enters the storage area. At this time, the storage flag formed in the RAM area of the microcomputer 21 is set at the point f.
【００３５】接点溶着判別結果の出力２１ｅはマイクロ
コンピュータ２１の直流電源（ＶＤＤ）７が確保されて
いる間はＨＩ状態を維持するが、直流電源（ＶＤＤ）７
が切れるハ点では接点溶着判別結果の出力２１ｅもＬＯ
レベルになる。この時前記コンデンサ９の両端電圧は自
己放電程度の緩やかな電圧降下状態に入るが、ダイオー
ド８はマイクロコンピュータ２１の接点溶着判別結果の
出力２１ｅを通してコンデンサ９に充電された電荷が放
電することを防いでいる。またＡ／Ｄ入力２１ｆは常時
ＨＩインピーダンスのために直接接続が可能になってい
る。The output 21e of the contact welding determination result maintains the HI state while the DC power supply (VDD) 7 of the microcomputer 21 is secured, but the DC power supply (VDD) 7
At the point C where the contact breaks, the output 21e of the contact welding determination result is also LO
Become a level. At this time, the voltage across the capacitor 9 enters a gentle voltage drop state of about self-discharge, but the diode 8 prevents discharge of the electric charge charged in the capacitor 9 through the output 21e of the contact welding determination result of the microcomputer 21. I'm out. Further, the A / D input 21f can always be directly connected because of the HI impedance.
【００３６】コンデンサ９の自己放電でニ点のｂレベル
で直流電源（ＶＤＤ）７が復帰した場合は、Ａ／Ｄ入力
２１ｆは［Ｍ］のようにマイクロコンピュータ２１は記
憶状態と判断し、継電器２の制御信号出力２１ｃの停止
を維持すると共に、ｇ点で記憶フラグが再度セットされ
マイクロコンピュータ２１の接点溶着判別結果の出力２
１ｅがＨＩになりコンデンサ９の両端電圧は再度電荷が
充電され、記憶がリフレッシュされる。When the direct-current power supply (VDD) 7 is restored at the two-point b level by self-discharge of the capacitor 9, the microcomputer 21 judges that the A / D input 21f is [M], and the relay is in the memory state. The control signal output 21c of No. 2 is maintained stopped, the memory flag is set again at the point g, and the output 2 of the contact welding determination result of the microcomputer 21 is output.
1e becomes HI, and the voltage across the capacitor 9 is charged again to refresh the memory.
【００３７】しかし、コンデンサ９の両端電圧がｅレベ
ルのようにＡ／Ｄ入力２１ｆの判定レベルｄ線に達しな
い場合は、Ａ／Ｄ入力２１ｆは［Ｒ］のようにＬＯレベ
ルのままで、記憶はリセットされ、継電器２の制御信号
出力２１ｃはｈのように駆動状態に入ってしまうが、こ
のようなことが実用上問題の無いレベルを実験で確認し
た結果、図６のハからニまでの間の記憶期待時間を１６
８時間（１週間）必要とすると、コンデンサ９に自己放
電の低いグレードを採用すれば２２０μＦで十分である
ことを得た。However, when the voltage across the capacitor 9 does not reach the judgment level d line of the A / D input 21f like the e level, the A / D input 21f remains at the LO level like [R], The memory is reset, and the control signal output 21c of the relay 2 enters the driving state like h, but as a result of confirming the level in which this is not a problem in practical use by experiment, from c to d in FIG. Expected time to remember between 16
If 8 hours (1 week) is required, 220 μF is sufficient if a grade with low self-discharge is adopted as the capacitor 9.
【００３８】このように本発明の第３の実施の形態にお
ける継電器の制御方法によれば、万が一マイクロコンピ
ュータの電源が切られたり、リセット等された場合にマ
イクロコンピュータが判断した強制停止状態あるいは末
期症状警告報知状態をコンデンサに記憶し、再通電、再
スタート時にも前記状態を確保できるので、安全で信頼
性が高い継電器の制御ができるという効果が得られる。As described above, according to the relay control method of the third embodiment of the present invention, the microcomputer is forced to stop the power supply or reset it, or the terminal is in the final stop state. Since the symptom warning notification state is stored in the capacitor and the state can be secured even when the power is turned on and restarted again, the effect of being able to control the relay with safety and high reliability can be obtained.
【００３９】[0039]
【発明の効果】以上のように本発明による継電器の制御
方法は、継電器の接点溶着を検出し、かつその信号をマ
イクロコンピュータの入力とする接点溶着検出入力手段
と、接点溶着時にマイクロコンピュータの継電器制御信
号を短いパルス信号に切り替える継電器制御手段と、前
記短いパルスの発生数を数える第１のカウンタ手段と、
前記継電器が動作する回数を数える第２のカウンタ手段
と、前記第１及び第２のカウンタ手段で数えた結果をマ
イクロコンピュータで処理する演算処理手段と、その演
算結果で前記継電器の制御信号を停止させる強制停止手
段と、前記マイクロコンピュータで処理した演算結果で
前記マイクロコンピュータが前記継電器の接点溶着の初
期症状と判断した場合に警告を発する警告表示手段又は
警告音発生手段と、末期症状と判断した場合の継電器を
強制停止させた状態を記憶させる強制停止記憶手段とを
備えた構成としたものであり、マイクロコンピュータに
より継電器の接点が寿命末期での摩耗故障に至る前に摩
耗故障の発生を予知することができ、警告手段による機
器本体のメンテナンス時期の報知や継電器を停止させる
強制停止手段および警報報知状態や強制停止状態を記憶
させる強制停止記憶手段により、突発故障や機器本体の
破損等が回避できるという効果が得られるものである。As described above, according to the relay control method of the present invention, the contact welding detection input means for detecting the contact welding of the relay and using the signal as the input of the microcomputer, and the relay of the microcomputer at the time of contact welding. Relay control means for switching the control signal to a short pulse signal, first counter means for counting the number of occurrences of the short pulse,
A second counter means for counting the number of times the relay operates, an arithmetic processing means for processing a result counted by the first and second counter means by a microcomputer, and a control signal for the relay stopped by the arithmetic result. Forced stop means to make, the warning display means or warning sound generating means to issue a warning when the microcomputer determines that it is the initial symptom of contact welding of the relay based on the calculation result processed by the microcomputer, and the terminal symptom. In this case, the configuration is provided with a forced stop storage means for storing the state in which the relay is forcibly stopped, and the occurrence of a wear failure is predicted by the microcomputer before the contact of the relay reaches the wear failure at the end of life. It is possible to notify the maintenance time of the equipment main body by the warning means and forced stop means for stopping the relay. Forced stop storage means for storing an alarm notification condition and forced stop state, in which the effect is obtained that damage of catastrophic failures and device body can be avoided.
【図１】本発明の実施の形態１における回路図FIG. 1 is a circuit diagram according to a first embodiment of the present invention.
【図２】同実施の形態１における接点溶着検出処理ルー
チンのフローチャートFIG. 2 is a flowchart of a contact welding detection processing routine according to the first embodiment.
【図３】同実施の形態２における回路図FIG. 3 is a circuit diagram according to the second embodiment.
【図４】同実施の形態２における接点溶着検出処理ルー
チンのフローチャートFIG. 4 is a flowchart of a contact welding detection processing routine according to the second embodiment.
【図５】同実施の形態３における回路図FIG. 5 is a circuit diagram of the third embodiment.
【図６】同実施の形態３におけるタイミングチャートFIG. 6 is a timing chart in the third embodiment.
【図７】従来例（特開平３−４５８５３号公報）による
回路図FIG. 7 is a circuit diagram according to a conventional example (JP-A-3-45853).
【図８】従来例（特開平３−４５８５３号公報）による
タイミングチャートFIG. 8 is a timing chart according to a conventional example (JP-A-3-45853).
２ 継電器 ３ 継電器駆動用トランジスタ ４ａ 継電器２の接点 ４ｂ 継電器２の接点 ５ 負荷 ６ 負荷駆動用電源 ７ 直流電源（ＶＤＤ） ２１ マイクロコンピュータ ２１ａ 電源入力（ＶＤＤ） ２１ｂ 負荷駆動用電源６と共通ラインとした電源入力
（ＶＳＳ） ２１ｃ 継電器２の制御出力 ２１ｄ 接点溶着検出用入力信号 ２１ｅ 接点溶着判別結果の出力2 relay 3 relay drive transistor 4a relay 2 contact 4b relay 2 contact 5 load 6 load drive power supply 7 direct current power supply (VDD) 21 microcomputer 21a power supply input (VDD) 21b load drive power supply 6 and common line Power input (VSS) 21c Control output of relay 2 21d Input signal for contact welding detection 21e Output of contact welding determination result
Claims (3)
号をマイクロコンピュータの入力とする接点溶着検出入
力手段と、接点溶着時にマイクロコンピュータの継電器
制御信号を短いパルス信号に切り替える継電器制御手段
と、前記短いパルス信号の発生数を数える第１のカウン
タ手段と、前記継電器が動作する回数を数える第２のカ
ウンタ手段と、前記第１及び第２のカウンタ手段で数え
た結果をマイクロコンピュータで処理する演算処理手段
と、その演算結果で前記継電器の制御信号を停止させる
強制停止手段からなる継電器の制御方法。1. A contact welding detection input means for detecting contact welding of a relay and using the signal as an input of a microcomputer, and a relay control means for switching a relay control signal of the microcomputer to a short pulse signal at the time of contact welding. A first counter means for counting the number of the short pulse signals generated, a second counter means for counting the number of times the relay operates, and a microcomputer for processing the results counted by the first and second counter means. A method of controlling a relay, comprising arithmetic processing means and forced stop means for stopping the control signal of the relay according to the result of the arithmetic processing.
果によりマイクロコンピュータが継電器の末期症状と判
断した場合に警告を発する警告表示手段、又は警告音発
生手段を設けた請求項１記載の継電器の制御方法。2. The relay control method according to claim 1, further comprising warning display means or warning sound generation means for issuing a warning when the microcomputer determines that the terminal symptom is present in the relay based on the calculation result processed by the microcomputer.
る強制停止記憶手段を設けた請求項１または２記載の継
電器の制御方法。3. The relay control method according to claim 1, further comprising a forced stop storage means for storing a state where the relay is forcibly stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10506296A JPH09293440A (en) | 1996-04-25 | 1996-04-25 | Relay control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10506296A JPH09293440A (en) | 1996-04-25 | 1996-04-25 | Relay control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09293440A true JPH09293440A (en) | 1997-11-11 |
Family
ID=14397487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10506296A Pending JPH09293440A (en) | 1996-04-25 | 1996-04-25 | Relay control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09293440A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999027306A1 (en) * | 1997-11-25 | 1999-06-03 | Matsushita Electric Industrial Co., Ltd. | Electric cooker |
| US7522400B2 (en) * | 2004-11-30 | 2009-04-21 | Robertshaw Controls Company | Method of detecting and correcting relay tack weld failures |
| JP2016143563A (en) * | 2015-02-02 | 2016-08-08 | オムロン株式会社 | Relay unit, and method of controlling the same |
| CN105845502A (en) * | 2015-02-02 | 2016-08-10 | 欧姆龙株式会社 | Relay unit and method for controlling relay circuit |
| US9939491B2 (en) | 2015-02-02 | 2018-04-10 | Omron Corporation | Relay unit, control method for relay unit |
| CN113496849A (en) * | 2020-04-02 | 2021-10-12 | 日本电产三协株式会社 | Relay device |
-
1996
- 1996-04-25 JP JP10506296A patent/JPH09293440A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999027306A1 (en) * | 1997-11-25 | 1999-06-03 | Matsushita Electric Industrial Co., Ltd. | Electric cooker |
| US6137091A (en) * | 1997-11-25 | 2000-10-24 | Matsushita Electric Industrial Co., Ltd. | Electric cooker |
| CN100375864C (en) * | 1997-11-25 | 2008-03-19 | 松下电器产业株式会社 | Electric cooker |
| US7522400B2 (en) * | 2004-11-30 | 2009-04-21 | Robertshaw Controls Company | Method of detecting and correcting relay tack weld failures |
| JP2016143563A (en) * | 2015-02-02 | 2016-08-08 | オムロン株式会社 | Relay unit, and method of controlling the same |
| CN105845503A (en) * | 2015-02-02 | 2016-08-10 | 欧姆龙株式会社 | Relay unit, control method for relay unit |
| CN105845502A (en) * | 2015-02-02 | 2016-08-10 | 欧姆龙株式会社 | Relay unit and method for controlling relay circuit |
| US9939491B2 (en) | 2015-02-02 | 2018-04-10 | Omron Corporation | Relay unit, control method for relay unit |
| US9997316B2 (en) | 2015-02-02 | 2018-06-12 | Omron Corporation | Relay unit, control method for relay unit |
| US10049842B2 (en) | 2015-02-02 | 2018-08-14 | Omron Corporation | Relay unit for performing insulation diagnosis and method for controlling same |
| CN113496849A (en) * | 2020-04-02 | 2021-10-12 | 日本电产三协株式会社 | Relay device |
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