JPH01276243A - Duplication control system - Google Patents

Duplication control system

Info

Publication number
JPH01276243A
JPH01276243A JP63105064A JP10506488A JPH01276243A JP H01276243 A JPH01276243 A JP H01276243A JP 63105064 A JP63105064 A JP 63105064A JP 10506488 A JP10506488 A JP 10506488A JP H01276243 A JPH01276243 A JP H01276243A
Authority
JP
Japan
Prior art keywords
fifo
control
shift
ctl
unit
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
JP63105064A
Other languages
Japanese (ja)
Other versions
JPH0630070B2 (en
Inventor
So Akai
赤井 創
Isao Domoto
堂本 功
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric 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 Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP63105064A priority Critical patent/JPH0630070B2/en
Priority to GB8904779A priority patent/GB2217487B/en
Priority to NL8900635A priority patent/NL8900635A/en
Priority to DE3911848A priority patent/DE3911848A1/en
Priority to BR898901738A priority patent/BR8901738A/en
Priority to KR1019890004858A priority patent/KR920003453B1/en
Priority to CN89102265A priority patent/CN1041466C/en
Publication of JPH01276243A publication Critical patent/JPH01276243A/en
Priority to GB9204278A priority patent/GB2251966B/en
Priority to GB9204279A priority patent/GB2251967B/en
Priority to US08/033,661 priority patent/US5434998A/en
Publication of JPH0630070B2 publication Critical patent/JPH0630070B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To improve the protection of an FIFO access and to obtain a duplex control system with a high reliability by executing the FIFO access only when a prescribed logical expression is satisfied. CONSTITUTION:An FIFO control means 2 inputs a read/write signal WR1, a control declaring signal CTL and a duplex control signal outputted from two processor units PC1 and PC2 and a duplex control unit DXC, and a shift-in SI and a shift-out SO are controlled by the logics of respective signals. Thus, for an FIFO 1, the shift-in SI and shift-out SO are controlled only at a time according to the logical expression from the FIFO control means 2, data in the FIFO 1 can be written and read, and otherwise, an access to the FIFO 1 is inhibited, and the data can be protected.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は入出力装置を共用する2つのプロセッサユニッ
トと、これらの2つのプロセッサユニットの動作を監視
し制御する二重化制御ユニットとを有する二重化制御シ
ステムに関し、更に詳しくは、2つのプロセッサユニッ
ト内のメモリの内容を等値化する手段として、ファース
トイン・ファ−ストアウト・メモリ<F I FO)を
用いた二重化制御システムに関する。
Detailed Description of the Invention (Field of Industrial Application) The present invention provides a duplex control system having two processor units that share an input/output device and a duplex control unit that monitors and controls the operations of these two processor units. The present invention relates to a system, and more particularly, to a duplex control system using first-in first-out memory (FIFO) as a means for equalizing the contents of memories in two processor units.

(従来の技術) 従来より、制御装置の信頼性を高める一つの手法として
、2つのプロセッサユニットを設けると共に、これらの
動作を監視し、どちら側を実作業に従事させ、どちら側
を待機状態とするか制御する二重化制御ユニットとを設
けた二重化システムがある。
(Prior Art) Conventionally, one method of increasing the reliability of a control device is to provide two processor units, monitor their operations, and determine which side is engaged in actual work and which side is in a standby state. There is a redundant system equipped with a redundant control unit that performs control.

この様なシステムにおいては、実作業の連続性を保つた
めに、2つのプロセッサユニット内のメモリの内容を一
致させる必要があり、そのための等値化手段として、従
来よりFIFOを用いたものがある。
In such systems, in order to maintain the continuity of actual work, it is necessary to match the contents of the memory in the two processor units, and FIFO has traditionally been used as an equalization means for this purpose. .

この場合、FIFOには、実作業側のプロセッサユニッ
ト内のメモリからのデータが、実作業側のプロセッサユ
ニットからのライト動作によって書き込まれ、待機側の
プロセッサユニットからのリード動作によって、その内
容が読み出され、待機側のプロセッサユニット内のメモ
リに書き込まれるようになっている。
In this case, data from the memory in the processor unit on the actual working side is written to the FIFO by a write operation from the processor unit on the actual working side, and its contents are read by a read operation from the processor unit on the standby side. It is written to the memory in the processor unit on the standby side.

(発明が解決しようとする課題) ところで、このようにメモリ内容の等値化手段として、
FIFOを用いた場合、FIFOに一旦格納したメモリ
内容が、実作業側のプロセッサユニットの例えばプログ
ラムの暴走などによって、破壊されるなどするとそれが
そのまま待機側に引き継がれることとなって共倒れにな
るという不具合が生ずる。
(Problem to be solved by the invention) By the way, as a means for equalizing memory contents in this way,
When using a FIFO, if the memory contents once stored in the FIFO are destroyed due to, for example, a runaway program in the processor unit on the actual working side, they will be inherited as they are on the standby side, resulting in a failure. A problem occurs.

本発明はこの様な点に鑑みてなされたものであって、そ
の目的は、FIFOに対する実作業側がらのリード・ラ
イトアクセス、待filllからのリード・ライトアク
セスを監視し、禁止されたアクセスにはFIFOの動作
を禁止して、その内容の保護を行い、システムの信頼性
を向上させることのできる二重化制御システムを実現す
ることにある。
The present invention has been made in view of these points, and its purpose is to monitor read/write accesses to the FIFO from the actual working side and read/write accesses from the standby fill, and to prevent prohibited accesses from occurring. The object of the present invention is to realize a redundant control system that can inhibit the operation of FIFO, protect its contents, and improve the reliability of the system.

(課題を解決するための手段) 第1図は本発明の基本的な構成を示すブロック図である
0図において、PCI、PO2は2つのプロセッサユニ
ット、DXCはこの2つのプロセッサユニットPCI、
PO2の動作を監視し、どちら側を実作業につかせどち
ら側を待8!側につかせるかを制御すると共に、2つの
プロセッサユニット内のメモリの内容を等値化するファ
ーストイン・ファーストアウト・メモリ(PIF’O)
1を含む二重化制御ユニットである。
(Means for Solving the Problem) FIG. 1 is a block diagram showing the basic configuration of the present invention. In FIG. 0, PCI and PO2 are two processor units, DXC is a two processor unit PCI,
Monitor the operation of PO2 and decide which side will do the actual work and which side will wait 8! First-in, first-out memory (PIF'O) that controls side-by-side control and equalizes the memory contents in the two processor units.
This is a redundant control unit including 1.

二重化制御ユニットにおいて、2はPIFOLのシフト
・インSl、シフト・アウトSOの制御を行うFII”
O制御手段である。
In the redundant control unit, 2 is FII which controls shift-in SL and shift-out SO of PIFOL.
O control means.

(作用) FIFO制御手段2は2つのプロセッサユニットpct
、PO2及び二重化制御ユニットDXCから出力される
リード/ライト信号WR1、制御宣言信号CTL、二重
化制御信号DO3を入力し、これらの各信号の論理によ
って、シフト・インS■、シフト・アウトSOを制御す
る。これによって必要な時以外にはFIFOへのアクセ
スを禁止し、その保護を可能とする。
(Operation) The FIFO control means 2 includes two processor units pct.
, PO2 and the read/write signal WR1, control declaration signal CTL, and duplex control signal DO3 output from the duplex control unit DXC are input, and the shift-in S■ and shift-out SO are controlled by the logic of these signals. do. This prohibits access to the FIFO except when necessary, making it possible to protect it.

(実施例) 以下図面を用いて、本発明の実施例を詳細に説明する。(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

第2図は、本発明の一実施例を示す構成ブロック図であ
る0図において、第1図と同じものには同一の符号を付
して示す、各プロセッサユニットpci、PO2は、い
ずれもプロセッサCPUと、メインメモリM M tJ
とを持っている。二重化制御ユニットDXCにおいて、
3は各プロセッサユニットから出力されるその動作状態
を示す信号RDYl、RDY2を監視し、どちらのプロ
セッサユニットに制御権を与えるかを判断する監視手段
であり、ここからは制御権をどちら側にするかを示す二
重化制御信号DC3L、DC8Rを出力する。
2 is a configuration block diagram showing an embodiment of the present invention. In FIG. 0, the same components as in FIG. 1 are denoted by the same reference numerals. CPU and main memory M M tJ
and have. In the redundant control unit DXC,
3 is a monitoring means that monitors the signals RDYl and RDY2 outputted from each processor unit and indicates the operating status thereof, and determines which processor unit should be given the control right. It outputs duplex control signals DC3L and DC8R indicating whether the

F、IFO制御手段2は、この二重化制御信号DC31
、DC3R,2つのプロセッサユニットPCI、PO2
からのリード/ライト信号WRIL、WRTR及び、制
御宣言信号CTLL、CTl−12をそれぞれ入力し、
FIFOIのシフト・インS■、シフト・アウトSOの
制御を、以下の論理式に従って制御している。
F, IFO control means 2 receives this duplication control signal DC31.
, DC3R, two processor units PCI, PO2
Input read/write signals WRIL, WRTR and control declaration signals CTLL, CTl-12 from
The FIFOI shift-in S2 and shift-out SO are controlled according to the following logical formula.

5I=WRI  L−CTLL  −DC3L+WRI
R−CTI、R−DC8R なだし、WRIは外部からのり−ド/ライト信号で、ラ
イトの時アサートされ る(各信号の添字りは左側のプ ロセッサユニットから、Rは右 側のプロセッサユニットからを 示している) c’FLは制御宣言信号で、実作業を行っているユニッ
トがアサートす る T)C3は二重化制御信号で、制御権を与えたい側のユ
ニットのDC3 を二重化制御ユニットがアサ− トする このように構成されるシステムによれば、FIFOIは
、FIFO制御手段2からの前記した論理式に従う場合
にのみ、シフト・インS■、シフト・アウトSOが制御
され、FIFOI内のデータの書き込み、読みたしが可
能となり、それ以外にはFIFOIへのアクセスが禁止
され、データの保護が行える。
5I=WRI L-CTLL -DC3L+WRI
R-CTI, R-DC8R Note: WRI is an external read/write signal that is asserted when writing (the subscript of each signal indicates from the left processor unit, R indicates from the right processor unit). c'FL is a control declaration signal, which is asserted by the unit that is performing the actual work.T) C3 is a duplex control signal, and the duplex control unit asserts DC3 of the unit to which it wants to give control. According to the system configured in this way, the FIFOI is controlled in shift-in S and shift-out SO only when the above-mentioned logical formula from the FIFO control means 2 is followed, and the writing of data in the FIFOI is performed. The data can be read and read, and any other access to the FIFOI is prohibited, thereby protecting the data.

なお、上記の実施例では2つのプロセッサユニットから
アクセスされることを想定したものであるか、二重化制
御ユニットDχC自身がアクセスできるようにしてもよ
い。
In the above embodiment, it is assumed that two processor units access it, or the duplex control unit DχC itself may be able to access it.

(発明の効果) 以上詳細に説明したように、本発明によれば、等値化手
段にFIFOを用いたシステムにおいて、FIFOアク
セスを所定の論理式を満足するときだけ行えるようにす
ることにより、FIFOアクセスの保護を改善でき、信
頼性の高い二重化制御システムが提供できる。
(Effects of the Invention) As described above in detail, according to the present invention, in a system using a FIFO as an equalization means, by allowing FIFO access to be performed only when a predetermined logical formula is satisfied, FIFO access protection can be improved and a highly reliable redundant control system can be provided.

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

第1図は本発明の基本的な構成ブロック図、第2図は本
発明の一実施例を示す構成ブロック図である。 Pct、PO2・・・プロセッサユニットDXC・・・
二重化制御ユニット ト・・FIFO 2・・・FIFO制御手段 3・・・監視手段 代理人 弁理士 小沢信助1、−゛1 第1図
FIG. 1 is a basic configuration block diagram of the present invention, and FIG. 2 is a configuration block diagram showing an embodiment of the present invention. Pct, PO2... Processor unit DXC...
Redundant control unit...FIFO 2...FIFO control means 3...Monitoring means agent Patent attorney Shinsuke Ozawa 1, -゛1 Figure 1

Claims (1)

【特許請求の範囲】  2つのプロセッサユニットと、この2つのプロセッサ
ユニットの動作を監視し、どちら側を実作業につかせど
ちら側を待機側につかせるかを制御すると共に、2つの
プロセッサユニット内のメモリの内容を等値化するファ
ーストイン・ファーストアウト・メモリ(FIFO)を
含む二重化制御ユニットとを有する二重化制御システム
において、前記FIFOのシフト・インSI、シフト・
アウトSOの制御を、以下の論理式に従つて行うFIF
O制御手段を設けたことを特徴とする二重化制御システ
ム。 SI=WRI_L−CTL_L−DCS_L+WRI_
R・CTL_R・DCS_R SO=@WRI@_L・@CTL@_L+@WRI@_
R・@CTL@_Rただし、WRIは外部からのリード
/ライト信号で、ライトの時アサートされる (各信号の添字_Lは左側のプロセッサユニットから、
_Rは右側のプロセッサユニットからを示している) CTLは制御宣言信号で、実作業を行っているユニット
がアサートする DCSは二重化制御信号で、制御権を与えたい側のユニ
ットのDCSを二重化制御ユニットがアサートする
[Claims] Two processor units; operations of these two processor units are monitored, which side is assigned to actual work and which side is assigned to standby side; In a duplex control system having a duplex control unit including a first-in first-out memory (FIFO) that equalizes the contents of the FIFO, a shift-in SI, a shift-
FIF controls out SO according to the following logical formula
A redundant control system characterized by providing an O control means. SI=WRI_L-CTL_L-DCS_L+WRI_
R・CTL_R・DCS_R SO=@WRI@_L・@CTL@_L+@WRI@_
R・@CTL@_R However, WRI is a read/write signal from the outside and is asserted when writing (the subscript _L of each signal is from the left processor unit,
(_R indicates from the right processor unit) CTL is a control declaration signal, and DCS asserted by the unit performing actual work is a duplex control signal. The DCS of the unit to which you want to give control is sent to the duplex control unit. asserts
JP63105064A 1988-04-13 1988-04-27 Redundant control system Expired - Fee Related JPH0630070B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP63105064A JPH0630070B2 (en) 1988-04-27 1988-04-27 Redundant control system
GB8904779A GB2217487B (en) 1988-04-13 1989-03-02 Dual computer system
NL8900635A NL8900635A (en) 1988-04-13 1989-03-15 DUAL COMPUTER SYSTEM.
DE3911848A DE3911848A1 (en) 1988-04-13 1989-04-11 DOUBLE COMPUTER SYSTEM
KR1019890004858A KR920003453B1 (en) 1988-04-13 1989-04-12 Duel computer system
BR898901738A BR8901738A (en) 1988-04-13 1989-04-12 DUAL COMPUTER SYSTEM
CN89102265A CN1041466C (en) 1988-04-13 1989-04-13 Dual control system
GB9204278A GB2251966B (en) 1988-04-13 1992-02-28 Dual computer system
GB9204279A GB2251967B (en) 1988-04-13 1992-02-28 Dual computer system
US08/033,661 US5434998A (en) 1988-04-13 1993-03-16 Dual computer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63105064A JPH0630070B2 (en) 1988-04-27 1988-04-27 Redundant control system

Publications (2)

Publication Number Publication Date
JPH01276243A true JPH01276243A (en) 1989-11-06
JPH0630070B2 JPH0630070B2 (en) 1994-04-20

Family

ID=14397530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63105064A Expired - Fee Related JPH0630070B2 (en) 1988-04-13 1988-04-27 Redundant control system

Country Status (1)

Country Link
JP (1) JPH0630070B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970002628A (en) * 1995-06-30 1997-01-28 Non-stopping system control device and system control method using same
JP2011217169A (en) * 2010-03-31 2011-10-27 National Institute Of Advanced Industrial Science & Technology Packet switching system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5786972A (en) * 1980-11-19 1982-05-31 Yokogawa Hokushin Electric Corp Doubled computer system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5786972A (en) * 1980-11-19 1982-05-31 Yokogawa Hokushin Electric Corp Doubled computer system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970002628A (en) * 1995-06-30 1997-01-28 Non-stopping system control device and system control method using same
JP2011217169A (en) * 2010-03-31 2011-10-27 National Institute Of Advanced Industrial Science & Technology Packet switching system

Also Published As

Publication number Publication date
JPH0630070B2 (en) 1994-04-20

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