JPS62136921A - And output circuit - Google Patents

And output circuit

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Publication number
JPS62136921A
JPS62136921A JP60277317A JP27731785A JPS62136921A JP S62136921 A JPS62136921 A JP S62136921A JP 60277317 A JP60277317 A JP 60277317A JP 27731785 A JP27731785 A JP 27731785A JP S62136921 A JPS62136921 A JP S62136921A
Authority
JP
Japan
Prior art keywords
circuit
terminal control
output
control elements
control element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP60277317A
Other languages
Japanese (ja)
Other versions
JPH0644706B2 (en
Inventor
Koji Inoue
鉱司 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP60277317A priority Critical patent/JPH0644706B2/en
Publication of JPS62136921A publication Critical patent/JPS62136921A/en
Publication of JPH0644706B2 publication Critical patent/JPH0644706B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To detect surely a circuit fault by connecting the 1st and 2nd circuits in parallel to which plural 3-terminal control elements are connected in series and detecting the direction of a current flowing between connection points by a current detection circuit. CONSTITUTION:The 2nd circuit 2 comprising series connection of two 3-terminal control elements Q2, Q3 is connected in parallel with the 1st circuit 1 comprising series connection of two 3-terminal control elements Q1, Q4. outputs a1, b1 are given to control input terminals B1, B3 of the 3-terminal control elements Q1, Q3 from an MPU1 of the system 1 and outputs a2, b2 of an MPU2 of the system 2 are given to control input terminals B2, B4 of the 3-terminal control elements Q2, Q4. A connection point A between the 3-terminal control elements Q1 and Q4 and a connection point B between the 3-terminal control elements Q3 and Q2 are connected by a connection line L and a current transformer CT is coupled to the connection line L. The connection line L and the current transformer CT constitute a current detection circuit.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、例えば2重系マイクロコンピュータシステム
(以下MPUと称する)の出力側等に付加されるアンド
出力回路に関し、複数個の3端子制御素子を直列に接続
した第1及び第2の回路を並列接続すると共に、第1の
回路及び第2の回路の3端子制御素子に対する制御入力
モードに応じて、第1の回路及び第2の回路における3
端子制御素子の接続点間に流れる電流の方向を電流検出
回路によって検出し、この電流検出信号に対応した応答
信号より、回路故障を確実に検出できるようにしたもの
である。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an AND output circuit which is added to the output side of a dual microcomputer system (hereinafter referred to as MPU), for example, and which uses a plurality of three-terminal control elements. The first and second circuits connected in series are connected in parallel, and the three terminals in the first circuit and the second circuit are
A current detection circuit detects the direction of the current flowing between the connection points of the terminal control element, and a circuit failure can be reliably detected from a response signal corresponding to this current detection signal.

従来の技術 従来、2重系MPUのアンド出力回路は、第2図に示す
ように、トランジスタまたはSSR等の3端子制御素子
Q+及びQ2を直列に接続すると共に、3端子制御素子
Q+ 、Q2の直列接続回路に対して直列に、出力リレ
ーRを接続した回路構成とし、3端子制御素子Q+ 、
Q2の各制御入力端B+ 、B2のそれぞれに対してl
系のMPUIの出力b1及び2系のM P U 2の出
力b2を与えて、そのアンド出力によって出力リレーR
を駆動するようになっていた。
Conventionally, as shown in FIG. 2, the AND output circuit of a dual system MPU connects three-terminal control elements Q+ and Q2 such as transistors or SSRs in series, and connects the three-terminal control elements Q+ and Q2 in series. The circuit has a circuit configuration in which the output relay R is connected in series to the series connection circuit, and the three-terminal control element Q+,
Each control input terminal B+ of Q2, l for each of B2
Give output b1 of system MPUI and output b2 of MPUI 2 of system 2, and output relay R by the AND output.
It was supposed to drive.

発明が解決しようとする問題点 しかしながら、第2図に示す従来のアンド出力回路にお
いては、3端子制御素子Qy+ 、 Q2の伺れか一方
、例えば3端子制御素子Q+ にオン。
Problems to be Solved by the Invention However, in the conventional AND output circuit shown in FIG. 2, one of the three-terminal control elements Qy+ and Q2, for example, the three-terminal control element Q+, is turned on.

モードの故障を生じた場合、他方の3端子制御素子Q2
に対する入力、つまり、2系のM P U 2の出力で
出力状態が決定されてしまい、フェイルセーフな出力を
得ることができないという問題点があった。
If a mode failure occurs, the other three-terminal control element Q2
There is a problem in that the output state is determined by the input to the MPU 2, that is, the output of the MPU 2 of the second system, and it is not possible to obtain a fail-safe output.

問題点を解決するための手段 本発明は上述する従来の問題点を解決するため、制御入
力端を有する複数個の3端子制御素子を直列に接続した
第1の回路と、この第1の回路と同数の3端子制御素子
の直列接続でなり前記第1の回路に対して並列に接続さ
れた第2の回路と、前記第1の回路における前記3端子
制御素子の接続点及び第2の回路における前記3端子制
御素子の接続点の間に流れる電流の方向を検出する電流
検出回路と、この電流検出回路から与えられる検出信号
に対応した応答信号を出力する回路とを有することを特
徴とする。
Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a first circuit in which a plurality of three-terminal control elements each having a control input terminal are connected in series, and a first circuit. a second circuit consisting of the same number of three-terminal control elements connected in series and connected in parallel to the first circuit, and a connection point of the three-terminal control elements in the first circuit and the second circuit. The present invention is characterized by comprising a current detection circuit that detects the direction of current flowing between the connection points of the three-terminal control element, and a circuit that outputs a response signal corresponding to the detection signal given from the current detection circuit. .

作用 本発明に係るアンド出力回路においては、複数個同数の
3端子制御素子を直列に接続してなる第1及び第2の回
路を並列に接続し、第1及び第2の回路の各3端子制御
素子に制御信号を与えて駆動した場合に、第1の回路の
3端子制御素子の接続点と、第2の回路の3端子制御素
子の接続点との間に流れる電流の方向を、電流検出回路
によって検出する。第1の回路における3端子制御素子
の接続点と、第2の回路における3端子制御素子の接続
点との間には、各3端子制御素子のオン、オフ状態に応
じた方向の電流が流れるから、これが可能である。
Operation In the AND output circuit according to the present invention, the first and second circuits each having the same number of three-terminal control elements connected in series are connected in parallel, and each of the three terminals of the first and second circuits is connected in parallel. When the control element is driven by applying a control signal, the direction of the current flowing between the connection point of the 3-terminal control element of the first circuit and the connection point of the 3-terminal control element of the second circuit is called current. Detected by a detection circuit. Between the connection point of the 3-terminal control element in the first circuit and the connection point of the 3-terminal control element in the second circuit, a current flows in a direction depending on the on/off state of each 3-terminal control element. This is possible from .

電流検出回路では5例えば電流の方向によって極性の異
なる電圧信号の電流検出信号を出力する。そして電流検
出信号に応じた応答信号より、故障であるか否かを判断
する。この故障診断は定期的または不定期的に行なうも
のであって、通常の動作状態では、本来のアンド動作に
よりアンド出力が得られる。
The current detection circuit 5 outputs a current detection signal, which is a voltage signal whose polarity differs depending on the direction of the current, for example. Then, it is determined whether or not there is a failure based on a response signal corresponding to the current detection signal. This fault diagnosis is performed periodically or irregularly, and under normal operating conditions, an AND output is obtained by the original AND operation.

実施例 第1図は本発明に係るアンド出力回路の一実施例におけ
る電気回路図である。この実施例では、2つの3端子制
g9素子Q+ 、Qaの直列接続で構成された第1の回
路lに対して並列に、2つの3端子制御素子Q2 、Q
3の直列接続でなる第2の回路2を接続しである。3端
子制御素子Q1及びQ3の制御入力端Bl 、B3 に
対して1系(7) M P U +からの出力(at 
、b+ )が与えられ、また3端子制御素子Q2.Qa
の制御入力端B2.B4に対しては2系のM P U 
2の出力(a2.B2)が与えられる。
Embodiment FIG. 1 is an electrical circuit diagram of an embodiment of the AND output circuit according to the present invention. In this embodiment, two 3-terminal control elements Q2, Q
A second circuit 2 consisting of three circuits connected in series is connected. The output (at
, b+ ) are given, and a three-terminal control element Q2 . Qa
control input terminal B2. 2 system MPU for B4
2 outputs (a2.B2) are given.

3端子制御素子Q+−Qaの接続点(イ)と、3端子制
御素子Q3−Q2の接続点(ロ)との間は接続線りによ
って接続し、この接続線りにカレントトランスCTを結
合させである。接続線り及びカレントトランスCTは電
流検出回路を構成している。
The connection point (a) of the three-terminal control element Q+-Qa and the connection point (b) of the three-terminal control element Q3-Q2 are connected by a connecting wire, and a current transformer CT is coupled to this connecting wire. It is. The connecting wire and current transformer CT constitute a current detection circuit.

カレントトランスCTの出力線間にはフォトカブラFC
+ 、Fe2を逆並列接続し、フォトカプラ’FC+ 
、Fe2から診断出力(a、b)を得るようになってい
る。R1#R3は抵抗、INI及びIN2 はインバー
タである。
A photocoupler FC is installed between the output lines of the current transformer CT.
+, Fe2 are connected in anti-parallel, photocoupler 'FC+
, Fe2 to obtain diagnostic outputs (a, b). R1 and R3 are resistors, and INI and IN2 are inverters.

通常は、1系のMPUI から3端子制御素子Qlの制
御入力端B1に対して与えられる出力1iLl 、及び
2系のM P U 2から3端子制御素子Q2 (1)
制御入力端B2に与えられる出力a2によって、アンド
出力動作を行なう、このアンド出力動作の前または後に
、定期的もしくは不定期的に故障診断を行なう。
Normally, the output 1iLl given from the MPUI of the 1st system to the control input terminal B1 of the 3-terminal control element Ql, and the output 1iLl given from the MPUI of the 2nd system to the 3-terminal control element Q2 (1)
An AND output operation is performed using the output a2 applied to the control input terminal B2. Before or after this AND output operation, failure diagnosis is performed periodically or irregularly.

次に、本発明に係るアンド出力回路の故障診断動作につ
いて、表1の出力真理値表を参照して説明する0表1は
3端子制御素子Q+ ”O4の全てが正常である場合の
真理値表である。
Next, the failure diagnosis operation of the AND output circuit according to the present invention will be explained with reference to the output truth table in Table 1.Table 1 shows the truth values when all of the three-terminal control elements Q+"O4 are normal. It is a table.

表1において、3端子制御素子Q+ 、O3の制御入力
端Bl 、B3に入力される1系のM P U 1の出
力(al 、b+ )が真理値(Olo)、3端子制御
素子Q2 、O4の制御入力端B2 、Baに入力され
る2系(7)MPU2(7)出力(O2,b2)が真理
値(Olo)である場合は、3端子制御素子QI”O4
の全てがオフとなるから、出力リレーRは無励磁となり
、アンド出力はオフとなる。また、接続線りには電流が
流れないから、診断出力(a、b)も真理値(O50)
となる。
In Table 1, the outputs (al, b+) of the first system MPU 1 input to the control input terminals Bl and B3 of the three-terminal control element Q+ and O3 are the truth values (Olo), and the three-terminal control element Q2 and O4 When the output (O2, b2) of the 2nd system (7) MPU2 (7) inputted to the control input terminal B2, Ba is the truth value (Olo), the 3-terminal control element QI''O4
Since all of them are turned off, the output relay R is de-energized and the AND output is turned off. Also, since no current flows through the connecting wires, the diagnostic output (a, b) also has the truth value (O50).
becomes.

次に、l系のMPU+(7)出力(al、b+ )が真
理値(1,O)、2系のM P U 2の出力(’az
 、b2)が真理値(1,0)である場合は、3端子制
御素子Q+及びO2がオンとなり、3端子制御素子Q+
 、O2のアンド条件が整い。
Next, the MPU+(7) output (al, b+) of the l system is the truth value (1, O), and the output of the MPU 2 of the 2nd system ('az
, b2) is the truth value (1, 0), the three-terminal control element Q+ and O2 are turned on, and the three-terminal control element Q+
, O2 AND condition is set.

出力リレーRが励磁され、アンド出力がオンとなる。Output relay R is excited and AND output is turned on.

この状態では、3端子制御素子Q3 、Qaがオフとな
るから、3端子制御素子Q+ 、O2のオン動作により
、接続線りに3端子制御素子Q1から3端子制御素子Q
2の方向に向う電流11が流れ、カレントトランスCT
に電流11の方向に応じた電圧E1が誘起する。この電
圧E1によりフォトカプラPCIが駆動され、診断出力
aが真理値1となる。フォトカプラFC2は電圧E1に
対して逆極性となるから、その診断出力すは真理値Oで
ある。
In this state, since the 3-terminal control elements Q3 and Qa are turned off, the 3-terminal control element Q1 is connected to the 3-terminal control element Q by the on operation of the 3-terminal control element Q+ and O2.
A current 11 flows in the direction of 2, and the current transformer CT
A voltage E1 corresponding to the direction of the current 11 is induced. The photocoupler PCI is driven by this voltage E1, and the diagnostic output a has a truth value of 1. Since the photocoupler FC2 has a polarity opposite to the voltage E1, its diagnostic output has a truth value O.

次に、l系のMPU+17)出力(at 、b+ )が
真理値(0,1)、2系のM P U 2の出力(O2
,b2)が真理値(0,1)−t’ある場合は、3端子
制御素子Q+ 、O2がオフ、3端子制御素子Q3 、
O4がオンとなり、出力リレーRが励磁されてアンド出
力がオンとなる。この場合、接続線りには、電流11と
は逆方向の電流工2が流れる。このため、カレントトラ
ンスCTに誘起する電圧E2は、前記電圧E1 とは逆
極性となる。この結果、フォトカプラFC2が駆動され
、その診断出力すが真理値l、フォトカプラFC+の診
断出力aが真理値0となる。
Next, the output (at, b+) of MPU+17) of system I is the truth value (0, 1), and the output of MPU 2 of system 2 (O2
, b2) has the truth value (0,1)-t', the three-terminal control element Q+ and O2 are off, and the three-terminal control element Q3,
O4 is turned on, the output relay R is excited, and the AND output is turned on. In this case, a current 2 flows in the opposite direction to the current 11 in the connecting wire. Therefore, the voltage E2 induced in the current transformer CT has the opposite polarity to the voltage E1. As a result, the photocoupler FC2 is driven, and its diagnostic output has a truth value l, and the diagnostic output a of the photocoupler FC+ has a truth value of 0.

上述のように、3端子制御素子Q1〜Q4が正常である
場合は、表1に従った出力真理値が得られるが、3端子
制御素子Q1〜Q4の何れかが短絡などの故障を生じた
場合には、表1の出力真理値とは異なるものとなる。従
って、表1の出力真理値が得られるか否かを検出するこ
とにより、回路故障の有無を診断することができる。
As mentioned above, if the 3-terminal control elements Q1 to Q4 are normal, the output truth value according to Table 1 will be obtained, but if any of the 3-terminal control elements Q1 to Q4 has a failure such as a short circuit. In this case, the output truth value will be different from the output truth value in Table 1. Therefore, by detecting whether or not the output truth values shown in Table 1 are obtained, it is possible to diagnose the presence or absence of a circuit failure.

しかも、l系及び2系の出力状態に不一致が発生した場
合も、表1の出力真理値が得られなくなるので、MPU
+ 、MPU2の故障をも診断できる。
Moreover, even if a mismatch occurs between the output states of the l system and the 2 system, the output truth values in Table 1 cannot be obtained, so the MPU
+ It is also possible to diagnose failures in MPU2.

発明の効果 以上述べたように、本発明に係るアンド出力回路は、複
数個の3端子制御素子を直列に接続した第1及び第2の
回路を並列接続すると共に、第1の回路及び第2の回路
の3端子制御素子に対する制御信号入力モードに応じて
、第1の回路及び第2の回路における3端子制御素子の
接続点間に流れる電流の方向を電流検出回路によって検
出し、この電流検出信号に対応した応答信号を出力し、
この応答信号より回路故障を確実に検出できるようにし
たフェイルセーフなアンド出力回路を提供することがで
きる。
Effects of the Invention As described above, the AND output circuit according to the present invention connects in parallel the first and second circuits in which a plurality of three-terminal control elements are connected in series, and also connects the first circuit and the second circuit in parallel. The current detection circuit detects the direction of the current flowing between the connection points of the three-terminal control element in the first circuit and the second circuit according to the control signal input mode for the three-terminal control element of the circuit. Outputs a response signal corresponding to the signal,
It is possible to provide a fail-safe AND output circuit that can reliably detect a circuit failure from this response signal.

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

第1図は本発明に係るアンド出力回路の電気回路図、第
2図は従来のアンド出力回路の電気回路図である。 Q+ ”Q4  ・・・3端子制御素子L・・・接1g
l@CT−,,カレントトランスFC+ 、Fe2  
・・・フォトカプラ第1図
FIG. 1 is an electrical circuit diagram of an AND output circuit according to the present invention, and FIG. 2 is an electrical circuit diagram of a conventional AND output circuit. Q+ "Q4... 3-terminal control element L... Contact 1g
l@CT-,, current transformer FC+, Fe2
... Photocoupler diagram 1

Claims (3)

【特許請求の範囲】[Claims] (1)制御入力端を有する複数個の3端子制御素子を直
列に接続した第1の回路と、この第1の回路と同数の3
端子制御素子の直列接続でなり前記第1の回路に対して
並列に接続された第2の回路と、前記第1の回路におけ
る前記3端子制御素子の接続点及び第2の回路における
前記3端子制御素子の接続点の間に流れる電流の方向を
検出する電流検出回路と、この電流検出回路から与えら
れる検出信号に対応した応答信号を出力する回路とを有
することを特徴とするアンド出力回路。
(1) A first circuit in which a plurality of three-terminal control elements each having a control input terminal are connected in series, and the same number of three-terminal control elements as this first circuit.
a second circuit having terminal control elements connected in series and connected in parallel to the first circuit; a connection point of the three-terminal control element in the first circuit and the three terminals in the second circuit; An AND output circuit comprising: a current detection circuit that detects the direction of a current flowing between connection points of a control element; and a circuit that outputs a response signal corresponding to a detection signal given from the current detection circuit.
(2)前記電流検出回路は、前記第1の回路及び前記第
2の回路における3端子制御素子の接続点間を結ぶ接続
線と、この接続線に結合されたカレントトランスとでな
ることを特徴とする特許請求の範囲第1項に記載のアン
ド出力回路。
(2) The current detection circuit is characterized by comprising a connection line connecting the connection points of the three-terminal control elements in the first circuit and the second circuit, and a current transformer coupled to this connection line. An AND output circuit according to claim 1.
(3)前記応答信号を出力する回路は、前記電流検出回
路の出力線に対して逆並列接続された少なくとも2つの
フォトカプラを備えてなることを特徴とする特許請求の
範囲第1項または第2項に記載のアンド出力回路。
(3) The circuit for outputting the response signal includes at least two photocouplers connected in antiparallel to the output line of the current detection circuit. AND output circuit according to item 2.
JP60277317A 1985-12-10 1985-12-10 AND output circuit Expired - Lifetime JPH0644706B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60277317A JPH0644706B2 (en) 1985-12-10 1985-12-10 AND output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60277317A JPH0644706B2 (en) 1985-12-10 1985-12-10 AND output circuit

Publications (2)

Publication Number Publication Date
JPS62136921A true JPS62136921A (en) 1987-06-19
JPH0644706B2 JPH0644706B2 (en) 1994-06-08

Family

ID=17581850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60277317A Expired - Lifetime JPH0644706B2 (en) 1985-12-10 1985-12-10 AND output circuit

Country Status (1)

Country Link
JP (1) JPH0644706B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007182119A (en) * 2006-01-05 2007-07-19 Hitachi Ltd Switch circuit having fail safe property making on-side danger side

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163834A (en) * 1984-02-06 1985-08-26 Tooa Eiyoo Kk Preparation of glycerin derivative

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163834A (en) * 1984-02-06 1985-08-26 Tooa Eiyoo Kk Preparation of glycerin derivative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007182119A (en) * 2006-01-05 2007-07-19 Hitachi Ltd Switch circuit having fail safe property making on-side danger side

Also Published As

Publication number Publication date
JPH0644706B2 (en) 1994-06-08

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