JPH05189261A - Active/spare switching device - Google Patents

Active/spare switching device

Info

Publication number
JPH05189261A
JPH05189261A JP4021922A JP2192292A JPH05189261A JP H05189261 A JPH05189261 A JP H05189261A JP 4021922 A JP4021922 A JP 4021922A JP 2192292 A JP2192292 A JP 2192292A JP H05189261 A JPH05189261 A JP H05189261A
Authority
JP
Japan
Prior art keywords
machine
standby
nand gate
active
output
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
Application number
JP4021922A
Other languages
Japanese (ja)
Inventor
Masao Murai
政夫 村井
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP4021922A priority Critical patent/JPH05189261A/en
Publication of JPH05189261A publication Critical patent/JPH05189261A/en
Pending legal-status Critical Current

Links

Landscapes

  • Direct Current Feeding And Distribution (AREA)
  • Power Sources (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To improve the easiness of maintenance, etc. CONSTITUTION:Since electrostatic capacity to determine the time constant of an active unit 1 is determined by only a capacitor 4, and in a spare unit 11, it is determined by the sum of the capacitors 14, 15, the time constant of the active unit 1 is shorter, and since a reset circuit 3 stops outputting a reset signal earlier than the reset circuit 13, the output of a NAND gate 2 becomes '0', and the active unit 1 starts up first. Besides, the output of the NAND gate 2 is inputted to the input terminal 18 of the NAND gate 12 through an input/output terminal, and the output of the same NAND gate 12 is kept at '1', and the spare unit 11 stands by. On the other hand, when the active unit 1 is disconnected while the active unit 1 is working, the input terminal 18 of the NAND gate 12 is made '1' by a pull-up resistor 20, and the output of the NAND gate 12 becomes '0', and the spare unit starts up.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、現用予備切替装置に関
し、特に、ユニット構成された電子回路に使用して好適
な現用予備切替装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active spare switching device, and more particularly to an active spare switching device suitable for use in a unitized electronic circuit.

【0002】[0002]

【従来の技術】従来、この種の現用予備切替装置とし
て、図2に示すものが知られている。図において、現用
予備切替装置101は、現用ユニット(現用機)108
と予備ユニット(予備機)109と別個に構成されてい
る。また、現用予備切替装置101内には、それぞれ出
力を互いの一入力に接続された三端子NANDゲート
(以下、単にNANDゲートという。)102と二端子
NANDゲート(以下、単にNANDゲートという。)
103とを備えるとともに一方のNANDゲート102
の一入力にはコンデンサ105の容量に対応した時定数
時間だけ電源電圧停止を検出してリセット信号を出力す
るリセット回路104が接続されている。そして、NA
NDゲート103の出力は予備ユニット109の起動制
御信号106となり、NANDゲート102の出力は現
用ユニット108の起動制御信号107となっている。
なお、起動制御信号106,107は“0”にて起動を
示す。
2. Description of the Related Art Conventionally, an active spare switching device of this type is shown in FIG. In the figure, a working standby switching device 101 is shown as a working unit (working machine) 108.
And a spare unit (spare machine) 109. In addition, in the active spare switching device 101, a three-terminal NAND gate (hereinafter, simply referred to as a NAND gate) 102 and a two-terminal NAND gate (hereinafter, simply referred to as a NAND gate) whose outputs are connected to one input of each other are provided.
And a NAND gate 102 on one side
A reset circuit 104 that detects a power supply voltage stop for a time constant time corresponding to the capacity of the capacitor 105 and outputs a reset signal is connected to one input of the. And NA
The output of the ND gate 103 is the activation control signal 106 of the standby unit 109, and the output of the NAND gate 102 is the activation control signal 107 of the active unit 108.
The activation control signals 106 and 107 are "0" to indicate activation.

【0003】かかる構成において、現用予備切替装置1
01と現用ユニット108及び予備ユニット109の電
源を同時に投入すると、コンデンサ105に充電される
時間だけ電源電圧低下によってリセット回路104の出
力は“0”となり、NANDゲート102の出力は
“1”となる。また、NANDゲート103の出力は
“0”となる。
In such a configuration, the active spare switching device 1
When 01, the current unit 108, and the standby unit 109 are turned on at the same time, the output of the reset circuit 104 becomes "0" and the output of the NAND gate 102 becomes "1" due to the voltage drop of the power supply for the time when the capacitor 105 is charged. .. Further, the output of the NAND gate 103 becomes "0".

【0004】NANDゲート103の出力が“0”とな
ったことで、起動制御信号106も“0”となり、現用
ユニット108が起動する。また、NANDゲート10
2の出力が“1”となったことで起動制御信号107も
“1”となり、予備ユニット109は待機となる。各ユ
ニット108,109の故障時あるいはマニュアル操作
による切替時には、NANDゲート103またはNAN
Dゲート102に負のパルスを入力することにより、現
用予備の切替が行われる。
Since the output of the NAND gate 103 becomes "0", the activation control signal 106 also becomes "0" and the active unit 108 is activated. In addition, the NAND gate 10
Since the output of 2 becomes "1", the activation control signal 107 also becomes "1", and the standby unit 109 is on standby. At the time of failure of each unit 108, 109 or switching by manual operation, the NAND gate 103 or NAN
By inputting a negative pulse to the D gate 102, switching of the working spare is performed.

【0005】[0005]

【発明が解決しようとする課題】上述した従来の現用予
備切替装置においては、現用ユニットと予備ユニットと
は別個に必要となり、当該現用予備切替装置については
予備を持つことができない。このため、当該現用予備切
替装置が故障した場合には現用と予備の切替を行うこと
ができず、システム全体に影響が出てしまうという課題
があった。また、電子回路がユニット化されているとき
に保守などによって現用予備切替装置を引き抜くと、両
ユニットが待機となってしまうため、容易に引き抜くこ
ともできないという課題があった。
In the above-mentioned conventional working spare switching device, the working unit and the spare unit are separately required, and the working spare switching device cannot have a spare. Therefore, there is a problem in that when the active standby switching device fails, it is not possible to switch between the active and standby, and the entire system is affected. In addition, if the current standby switching device is pulled out for maintenance or the like while the electronic circuit is unitized, both units will be in a standby state, so that there is a problem that it cannot be pulled out easily.

【0006】本発明は、上記課題にかんがみてなされた
もので、保守の容易性などを向上せしめることが可能な
現用予備切替装置の提供を目的とする。
The present invention has been made in view of the above problems, and an object of the present invention is to provide an active spare switching device capable of improving ease of maintenance and the like.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するた
め、請求項1にかかる発明は、現用機と予備機とを備え
た現用予備システムにて現用機と予備機とを切り換える
ために現用機と予備機に備えられる現用予備切替装置で
あって、電源投入から所定時間の経過を計測する計測手
段と、相手機からの稼働状況を表す信号を入力して上記
計測手段による所定時間の計測後に相手機が稼働してい
ないときには自機を稼働させるとともに自機の稼働を表
す信号を相手機に出力し、逆に、上記計測手段による所
定時間の計測後に相手機が稼働しているときには自機を
稼働させないとともに自機の非稼働を表す信号を相手機
に出力する稼働制御手段と、予備機として選択されたと
きに上記計測手段の計測時間を長くさせる計測時間延長
手段とを備えた構成としてある。
In order to achieve the above object, the invention according to claim 1 is an active machine for switching between an active machine and a standby machine in an active spare system including an active machine and a standby machine. A standby switching device currently in use, which is provided in the standby machine, and which has a measuring means for measuring the lapse of a predetermined time from the power-on and a signal indicating the operating condition from the other machine, and after measuring the predetermined time by the measuring means. When the partner machine is not operating, it outputs the signal indicating the operation of the partner machine to the partner machine and, conversely, when the partner machine is running after the measurement of the predetermined time by the measuring means, the partner machine And an operation control means for outputting a signal indicating the non-operation of the own machine to the other machine, and a measurement time extending means for lengthening the measurement time of the measuring means when selected as a standby machine Are you.

【0008】また、請求項2にかかる発明は、請求項1
に記載の現用予備切替装置において、上記稼働制御手段
を、相手機からの稼働状況を表す信号が入力されないと
きに相手機が非稼働であるように仮定して認識せしめる
稼働状況認識手段を備えた構成としてある。
The invention according to claim 2 is the same as claim 1
In the active standby switching device described in (1), the operation control means is provided with operation status recognition means for recognizing that the partner machine is inactive when a signal indicating the operation status from the partner machine is not input. It is as a configuration.

【0009】[0009]

【作用】上記のように構成した請求項1にかかる発明に
おいては、現用機と予備機内で計測手段は電源投入から
所定時間の経過を計測しており、かつ、このときに予備
機内では計測時間延長手段が予備機として選択されてい
るので上記計測手段の計測時間を長くさせている。そし
て、現用機と予備機とにおいてこの計測手段の計測時間
中は互いに稼働制御手段が相手機に非稼働を表す信号を
出力している。
In the invention according to claim 1 configured as described above, in the working machine and the standby machine, the measuring means measures the elapse of a predetermined time after the power is turned on, and at this time, the measuring time in the standby machine. Since the extending means is selected as the standby machine, the measuring time of the measuring means is lengthened. Then, in the working machine and the standby machine, the operation control means mutually outputs a signal indicating non-operation to the other machine during the measurement time of the measuring means.

【0010】現用機においては、上記計測手段による所
定時間の計測は早期に完了し、稼働制御手段が予備機で
ある相手機からの非稼働を表す信号を入力して自機を稼
働させ、予備機に自機の稼働を表す信号を相手機に出力
する。一方、予備機においては、上記計測手段による所
定時間の計測後に現用機である相手機からの稼働を表す
信号を入力して自機を稼働させないとともに、現用機に
対して非稼働を表す信号を出力する。
In the working machine, the measurement of the predetermined time by the measuring means is completed early, and the operation control means inputs the signal indicating the non-operation from the partner machine, which is the spare machine, to operate the self machine, A signal indicating the operation of the own machine is output to the other machine. On the other hand, in the standby machine, after measuring the predetermined time by the measuring means, the signal indicating the operation from the partner machine, which is the active machine, is not input and the own machine is not operated, and the signal indicating the non-operation is transmitted to the active machine. Output.

【0011】また、上記のように構成した請求項2にか
かる発明においては、上記稼働制御手段は、何らかの異
常または保守などによって相手機からの稼働状況を表す
信号が入力されないときに稼働状況認識手段が相手機の
非稼働と仮定して当該稼働制御手段に認識せしめる。
Further, in the invention according to claim 2 configured as described above, the operation control means is such that the operation status recognition means is provided when a signal indicating the operation status is not input from the partner machine due to some abnormality or maintenance. On the assumption that the partner machine is not in operation, and let the operation control means recognize it.

【0012】[0012]

【実施例】以下、図面にもとづいて本発明の実施例を説
明する。図1は、本発明の一実施例にかかる現用予備切
替装置のブロック図である。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an active backup switching device according to an embodiment of the present invention.

【0013】同図において、1は現用ユニット、11は
予備ユニットであり、それぞれ三つの入出力端子を備え
ている。各ユニット1,11内にそれぞれ三端子NAN
Dゲート2,12が備えられており、上記入出力端子を
介して、NANDゲート2の出力はNANDゲート12
の入力端18に接続され、逆に、NANDゲート12の
出力はNANDゲート2の入力端8に接続されている。
In the figure, 1 is a working unit and 11 is a spare unit, each having three input / output terminals. Three-terminal NAN in each unit 1 and 11
D gates 2 and 12 are provided, and the output of the NAND gate 2 is output from the NAND gate 12 via the input / output terminal.
Of the NAND gate 12 is connected to the input terminal 8 of the NAND gate 2.

【0014】また、NANDゲート2,12における他
の入力端7,17にはそれぞれコンデンサ4,5とコン
デンサ14,15の容量に応じてリセット時間が定めら
れるリセット回路3,13の出力が入力されている。こ
こで、コンデンサ4,14は一の端子を接地され、コン
デンサ5,15は一の端子を上記入出力端子に接続され
ており、また、コンデンサ5,15が接続される入出力
端子のうち、予備ユニット11の入出力端子だけを接地
している。なお、コンデンサ4とコンデンサ14の容量
は同じにしてある。
Further, the outputs of the reset circuits 3 and 13 whose reset times are determined according to the capacitances of the capacitors 4 and 5 and the capacitors 14 and 15 are input to the other input terminals 7 and 17 of the NAND gates 2 and 12, respectively. ing. Here, the capacitors 4 and 14 have one terminal grounded, the capacitors 5 and 15 have one terminal connected to the input / output terminal, and among the input / output terminals to which the capacitors 5 and 15 are connected, Only the input / output terminals of the spare unit 11 are grounded. The capacitors 4 and 14 have the same capacitance.

【0015】さらに、NANDゲート2,12における
相手機からの入力端8,18はプルアップ抵抗10,2
0によりプルアップされている。次に、上記構成からな
る本実施例の動作を説明する。現用ユニット1と予備ユ
ニット11の電源を同時に投入すると、リセット回路
3,13は各コンデンサ4,5,14,15の容量に応
じた時定数時間だけリセット信号を出力し、NANDゲ
ート2,12の入力端7,17には“0”が入力される
ので両NANDゲート2,12の出力は“1”となって
両ユニット1,11は待機となる。
Further, the input terminals 8 and 18 from the other party in the NAND gates 2 and 12 have pull-up resistors 10 and 2, respectively.
Pulled up by 0. Next, the operation of this embodiment having the above configuration will be described. When the power of the working unit 1 and the standby unit 11 is turned on at the same time, the reset circuits 3 and 13 output the reset signal for a time constant time corresponding to the capacitances of the capacitors 4,5, 14 and 15, and the NAND gates 2 and 12 operate. Since "0" is input to the input terminals 7 and 17, the outputs of both NAND gates 2 and 12 are "1", and both units 1 and 11 are on standby.

【0016】ところで、現用ユニット1の時定数を定め
る静電容量は接地されているコンデンサ4だけで定ま
り、予備ユニット11においては接地されているコンデ
ンサ14,15の容量の和で定まる。従って、現用ユニ
ット1の時定数の方が短く、リセット回路3の方がリセ
ット回路13よりも早期にリセット信号の出力を停止す
るので、NANDゲート2の出力は“0”となる。
By the way, the electrostatic capacity that determines the time constant of the working unit 1 is determined only by the grounded capacitor 4, and is determined by the sum of the capacitances of the grounded capacitors 14 and 15 in the backup unit 11. Therefore, since the time constant of the active unit 1 is shorter and the reset circuit 3 stops outputting the reset signal earlier than the reset circuit 13, the output of the NAND gate 2 becomes "0".

【0017】すると、現用ユニット1が先に立ち上がる
とともに、上記NANDゲート2の出力が入出力端子を
介してNANDゲート12の入力端18にに入力され、
同NANDゲート12は出力を“1”に維持されて予備
ユニット11は待機する。現用予備を切り替えるには、
NANDゲート2の入力端6に“0”のパルスを入力す
る。すると、NANDゲート2の出力は“1”となり、
現用ユニット1が待機となるとともに同NANDゲート
2の出力がNANDゲート12の入力端18に入力され
て同NANDゲート12の出力が“0”となる。
Then, the active unit 1 starts up first, and the output of the NAND gate 2 is input to the input end 18 of the NAND gate 12 via the input / output terminal.
The output of the NAND gate 12 is maintained at "1" and the standby unit 11 waits. To switch the active backup,
A “0” pulse is input to the input terminal 6 of the NAND gate 2. Then, the output of the NAND gate 2 becomes "1",
While the active unit 1 is on standby, the output of the NAND gate 2 is input to the input end 18 of the NAND gate 12 and the output of the NAND gate 12 becomes "0".

【0018】また、現用ユニット1が稼働しているとき
に当該現用ユニット1を取り外すと、NANDゲート1
2の入力端18はプルアップ抵抗20によって“1”と
なり、当該NANDゲート12の出力が“0”となって
予備ユニットが立ち上がる。
If the working unit 1 is removed while it is operating, the NAND gate 1
The input terminal 18 of 2 is set to "1" by the pull-up resistor 20, the output of the NAND gate 12 is set to "0", and the standby unit starts up.

【0019】[0019]

【発明の効果】以上説明したように本発明は、現用機と
予備機に組み込まれるので、単体として使用する場合の
ように予備の心配をする必要がなくシステムの安定性を
向上させることができるとともに、保守の場合には現用
機または予備機を取り外すだけで相手機が起動されるよ
うになるため、保守を容易にさせることが可能な現用予
備切替装置を提供することができる。
As described above, since the present invention is incorporated into the working machine and the spare machine, it is possible to improve the stability of the system without having to worry about the spare as in the case of using the machine alone. At the same time, in the case of maintenance, the other machine is activated only by removing the active machine or the standby machine, so that it is possible to provide the active backup switching device that can facilitate the maintenance.

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

【図1】本発明の一実施例にかかる現用予備切替装置の
ブロック図である。
FIG. 1 is a block diagram of an active backup switching device according to an embodiment of the present invention.

【図2】従来の現用予備切替装置のブロック図である。FIG. 2 is a block diagram of a conventional active backup switching device.

【符号の説明】[Explanation of symbols]

1,11…ユニット 2,12…NANDゲート 3,13…リセット回路 4,5,14,15…コンデンサ 6,16…入力端 7,17…入力端 8,18…入力端 10,20…プルアップ抵抗 1, 11 ... Unit 2, 12 ... NAND gate 3, 13 ... Reset circuit 4, 5, 14, 15 ... Capacitor 6, 16 ... Input end 7, 17 ... Input end 8, 18 ... Input end 10, 20 ... Pull-up resistance

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 H02J 1/00 308 C 7373−5G ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location H02J 1/00 308 C 7373-5G

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 現用機と予備機とを備えた現用予備シス
テムにて現用機と予備機とを切り換えるために現用機と
予備機に備えられる現用予備切替装置であって、 電源投入から所定時間の経過を計測する計測手段と、 相手機からの稼働状況を表す信号を入力して上記計測手
段による所定時間の計測後に相手機が稼働していないと
きには自機を稼働させるとともに自機の稼働を表す信号
を相手機に出力し、逆に、上記計測手段による所定時間
の計測後に相手機が稼働しているときには自機を稼働さ
せないとともに自機の非稼働を表す信号を相手機に出力
する稼働制御手段と、 予備機として選択されたときに上記計測手段の計測時間
を長くさせる計測時間延長手段とを具備することを特徴
とする現用予備切替装置。
1. A working standby switching device provided in a working machine and a standby machine for switching between the working machine and the standby machine in a working standby system including the working machine and the standby machine, which is a predetermined time from power-on. The measuring means for measuring the progress of the other machine and the signal indicating the operation status from the other machine are input, and when the other machine is not operating after the predetermined time is measured by the above measuring machine, the own machine is operated and the operation of the own machine is started. An operation that outputs a signal indicating to the partner machine and, conversely, does not operate the partner machine while the partner machine is operating after the predetermined time is measured by the measuring means and outputs a signal indicating the non-operation of the partner machine to the partner machine An active standby switching device comprising: a control means and a measurement time extension means for lengthening the measurement time of the measurement means when selected as a standby machine.
【請求項2】 上記請求項1に記載の現用予備切替装置
において、上記稼働制御手段を、相手機からの稼働状況
を表す信号が入力されないときに相手機が非稼働である
ように仮定して認識せしめる稼働状況認識手段とを有す
る構成としたことを特徴とする現用予備切替装置。
2. The active standby switching device according to claim 1, wherein the operation control means assumes that the partner machine is not in operation when a signal indicating the operation status from the partner machine is not input. An active backup switching device, characterized in that it has an operating condition recognition means for recognition.
JP4021922A 1992-01-10 1992-01-10 Active/spare switching device Pending JPH05189261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4021922A JPH05189261A (en) 1992-01-10 1992-01-10 Active/spare switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4021922A JPH05189261A (en) 1992-01-10 1992-01-10 Active/spare switching device

Publications (1)

Publication Number Publication Date
JPH05189261A true JPH05189261A (en) 1993-07-30

Family

ID=12068568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4021922A Pending JPH05189261A (en) 1992-01-10 1992-01-10 Active/spare switching device

Country Status (1)

Country Link
JP (1) JPH05189261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012165639A (en) * 2011-02-07 2012-08-30 General Electric Co <Ge> System and method for providing redundant power to device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012165639A (en) * 2011-02-07 2012-08-30 General Electric Co <Ge> System and method for providing redundant power to device

Similar Documents

Publication Publication Date Title
US6163183A (en) Multifunction reset for mixed-signal integrated circuits
JPS5911998B2 (en) Data check method
JPH05189261A (en) Active/spare switching device
US6745338B1 (en) System for automatically selecting clock modes based on a state of clock input pin and generating a clock signal with an oscillator thereafter
JPH08147064A (en) Intermittent operating circuit
JPH0212546A (en) Memory holding system
JPH0445065Y2 (en)
JPH11133069A (en) Voltage monitoring circuit
JP2776093B2 (en) Reset circuit
CN214311848U (en) Electronic lock system
JPH0143650Y2 (en)
JPS6111775Y2 (en)
JPH11191937A (en) Power interrupt processing apparatus
JPH0430617B2 (en)
JPH022165B2 (en)
JPH0253803B2 (en)
JPH035930Y2 (en)
JPS59191924A (en) Reset pulse generating circuit
KR950010489Y1 (en) Device test circuit
JPH02211019A (en) Power interruption detection circuit
JPH02246612A (en) Watchdog timer circuit
KR910009037A (en) Central processor automatic reset circuit in small telephone exchange
JPH02199520A (en) Reset control system
JPS60262229A (en) Lifetime discriminating method of memory backup battery
JPH0637610A (en) Integrated circuit