JP2010231490A - Circuit board for control of failure transfer signal output due to cpu reset - Google Patents

Circuit board for control of failure transfer signal output due to cpu reset Download PDF

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JP2010231490A
JP2010231490A JP2009078215A JP2009078215A JP2010231490A JP 2010231490 A JP2010231490 A JP 2010231490A JP 2009078215 A JP2009078215 A JP 2009078215A JP 2009078215 A JP2009078215 A JP 2009078215A JP 2010231490 A JP2010231490 A JP 2010231490A
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cpu
output
failure
cpu reset
failure transfer
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Masanori Tamura
政徳 田村
Hideki Kawai
秀規 河合
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Nittan Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To control the number of times of failure transfer signal output due to CPU reset which frequently occurs due to such an effect as an installation environment noise. <P>SOLUTION: A failure transfer signal output control circuit board 1 includes: a transistor DTA1 to be driven according to the rising of the CPU reset pulse input of a CPU substrate 20 of a monitoring control device 10; a capacitor C1 and a resistance R for charging and discharging the amplification currents of the transistor DTA1 in a prescribed time; an IC 3 having a comparator for determining whether both edge voltages of the capacitor exceed a specific reference voltage; and a relay RL1 to be driven by the output of the comparator. According to the CPU reset input by the prescribed number of times, failure transfer signal output is performed to the outside of the monitoring device. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、監視制御装置が他設備へ移報する際の故障出力制御に関するものである。   The present invention relates to failure output control when a monitoring control device transfers information to other equipment.

ウォッチドッグタイマにより、マイコンが正常に動作しているか否かをチェックし、異常動作を検出した場合には、CPUに割り込みをかける(CPUリセットを行う)回路を備えた監視制御装置がある(例えば特許文献1)。 There is a monitoring control device having a circuit that interrupts the CPU (performs CPU reset) when the microcomputer checks whether the microcomputer is operating normally by a watchdog timer and detects abnormal operation (for example, Patent Document 1).

特開平4−65731号公報JP-A-4-65731

ところで、異なるシステムの監視制御装置間においては、伝送形態などが異なるため、上位装置として設定された監視制御装置に対して、下位装置として設定された他方の監視制御装置が移信出力を行う構成を採る場合がある。例えば、火災受信装置が、防犯監視装置に対して火災移信出力や故障移信出力等を行う場合である。 By the way, since the transmission form and the like are different between the monitoring control devices of different systems, the other monitoring control device set as the lower device performs the transfer output with respect to the monitoring control device set as the higher device. May be used. For example, this is a case where the fire receiving device performs a fire transfer output, a failure transfer output, or the like to the security monitoring device.

ここで、上記火災受信装置にはウォッチドッグタイマが設けられており、火災受信装置および火災受信装置のCPUの仕様に適したウオッチドッグタイマの機能によってCPUが監視されている。すなわち、CPUが暴走などの機能不全に陥った場合、ウォッチドッグタイマによってCPUはリセットされ、火災受信装置は、リレー駆動などによりCPUリセット出力信号を防犯監視装置に故障移信出力する。   Here, the fire receiving device is provided with a watch dog timer, and the CPU is monitored by the function of the fire receiving device and the watch dog timer suitable for the CPU specifications of the fire receiving device. That is, when the CPU has a malfunction such as runaway, the CPU is reset by the watchdog timer, and the fire receiving device outputs a CPU reset output signal to the crime prevention monitoring device by means of relay driving or the like.

また、火災受信装置の設置環境によってはノイズなどの影響によりCPUリセットが発生して頻繁に故障移信出力する場合がある。この場合、CPUリセットは瞬間的なものであり、故障移信出力しても瞬時復旧するので、移信入力側の他の監視制御装置(防犯監視装置)においてはノイズと判断するが、ノイズの度毎に故障移信出力の原因を確認しなければならず、煩雑かつ面倒であった。 In addition, depending on the installation environment of the fire receiving device, a CPU reset may occur due to the influence of noise or the like and frequent failure transfer output may occur. In this case, the CPU reset is instantaneous, and even if the failure transfer is output, it is recovered instantaneously. Therefore, other monitoring control devices (security monitoring devices) on the transfer input side determine that the noise is The cause of the failure transfer output had to be confirmed every time, which was cumbersome and troublesome.

また、このような監視制御システム上における故障要因とは認められないCPUリセットによる故障移信出力を解決する方法として、火災受信装置の故障移信出力制御に関するプログラムを書き換えるなどのソフトウェア変更による対策が考えられるが、既設の監視制御装置であってソフトウェア変更が不可能なものにおいてはプログラムの書き換えが出来ないという問題がある。また、ソフトウェアの変更が可能な場合であっても、デバッグ作業やシステム再稼働時の検証作業などに多くの時間を費やさなければならず、面倒かつ高コストであるという問題があった。   In addition, as a method of solving failure transfer output due to CPU reset, which is not recognized as a cause of failure on such a supervisory control system, countermeasures by software change such as rewriting a program related to failure transfer output control of the fire receiving device are possible. Although it is conceivable, there is a problem that the program cannot be rewritten in an existing monitoring and control apparatus that cannot change software. Even when the software can be changed, a lot of time has to be spent on debugging work and verification work when the system is restarted, which is troublesome and expensive.

したがって、本発明は、監視制御装置の故障移信出力制御を安価かつ簡単に行うことが可能な回路基板を提供することを目的とする。   Therefore, an object of the present invention is to provide a circuit board capable of easily and inexpensively performing failure transfer output control of a monitoring control device.

上記目的を達成するために、請求項1記載の発明は、監視制御装置のCPU基板から出力されるCPUリセットパルス入力の立ち上がり又は立ち下がりを検出して故障移信出力を行う故障移信出力制御回路基板であって、前記CPUリセットパルス入力によって駆動して電流を出力する電流出力回路部と、該電流出力回路部の出力電流を所定時間内に充電する充電回路部と、前記充電回路部の充電電圧が所定の基準電圧を越えるとHIGHの電圧を出力する比較回路部と、該比較回路部からの出力を受けて故障移信出力する移信出力回路部とを備えたことを特徴とする。   In order to achieve the above object, the invention according to claim 1 is a failure transfer output control for detecting a rising edge or a falling edge of a CPU reset pulse input output from a CPU board of a supervisory controller and performing a failure transfer output. A circuit board that is driven by the CPU reset pulse input and outputs a current; a charging circuit section that charges the output current of the current output circuit section within a predetermined time; and A comparison circuit unit that outputs a HIGH voltage when a charging voltage exceeds a predetermined reference voltage, and a transfer output circuit unit that receives an output from the comparison circuit unit and outputs a failure transfer, are provided. .

本発明の故障移信出力回路基板を監視制御装置に設けることにより、ソフトウェアの変更を行わずに確実な故障移信出力を行うことができる。   By providing the failure transfer output circuit board of the present invention in the monitoring control device, it is possible to perform reliable failure transfer output without changing software.

本発明のCPUリセットによる故障移信出力制御回路基板を示す回路図である。It is a circuit diagram which shows the failure transfer output control circuit board by CPU reset of this invention. 故障移信出力制御回路の回路素子の各動作状態を表す波形図である。It is a wave form diagram showing each operation state of a circuit element of a failure transfer output control circuit.

図1は、監視制御装置10の構成図であり、CPU基板20とCPUリセットによる故障移信出力制御回路基板1(以下、「故障出力対策基板1」という)の回路図である。また、図2は後述する故障対策基板1の回路素子の各動作状態を示す波形図である。   FIG. 1 is a configuration diagram of the monitoring control device 10 and is a circuit diagram of a CPU board 20 and a fault transfer output control circuit board 1 (hereinafter referred to as “fault output countermeasure board 1”) by CPU reset. FIG. 2 is a waveform diagram showing each operation state of a circuit element of a failure countermeasure board 1 described later.

まず、監視制御装置10(火災受信装置10)のシステム構成について説明する。
監視制御装置10(火災受信装置10)には、図示しない火災感知器が回線を介して接続されており、火災感知器から火災感知信号を受信すると、監視制御装置10(火災受信装置10)は、火災警報制御およびその他の火災警報に必要な制御を行う。
First, the system configuration of the monitoring control device 10 (fire receiving device 10) will be described.
A fire detector (not shown) is connected to the monitoring control device 10 (fire receiving device 10) via a line. When a fire detection signal is received from the fire detector, the monitoring control device 10 (fire receiving device 10) , Fire alarm control and other control necessary for fire alarm.

また、監視制御装置10(火災受信装置10)は、他設備である防犯監視装置(図示せず)に移報回線を介して接続されており、火災警報時または監視制御装置10(火災受信装置10)がCPU暴走などにより故障した際に、防犯監視装置(他設備の監視制御装置)に対して火災移信出力または故障移信出力を行う。   Further, the monitoring control device 10 (fire receiving device 10) is connected to a crime prevention monitoring device (not shown) which is another facility through a transfer line, and at the time of a fire alarm or the monitoring control device 10 (fire receiving device) 10) When a failure occurs due to a CPU runaway or the like, a fire transfer output or a failure transfer output is performed to a crime prevention monitoring device (monitoring control device of another facility).

次に監視制御装置10(火災受信装置10)の内部の構成・動作について説明する。
監視制御装置10(火災受信装置10)は、CPU基板20を備えており、前述した火災警報などの各種制御処理を行う。
Next, the internal configuration and operation of the monitoring control device 10 (fire receiving device 10) will be described.
The monitoring control device 10 (fire receiving device 10) includes a CPU board 20 and performs various control processes such as the fire alarm described above.

CPU基板20は、CPU40と、ウォッチドッグタイマ50(以下、WDT50とする)を備えており、WDT50がCPU40の正常・異常の監視を行っている。CPU40が暴走や異常動作などの故障状態になるとWDT50はこれを検出し、故障状態のCPU40に対して割り込み信号を送出してCPU40をリセットする。   The CPU board 20 includes a CPU 40 and a watchdog timer 50 (hereinafter referred to as WDT 50), and the WDT 50 monitors the normality / abnormality of the CPU 40. When the CPU 40 becomes in a failure state such as runaway or abnormal operation, the WDT 50 detects this and sends an interrupt signal to the CPU 40 in the failure state to reset the CPU 40.

また、CPU40のpinの一つは、本発明の故障出力対策基板1に設けられた端子部2の入力端子と配線を介して電気的に接続されている(以下、pinという)。そして、CPU40の正常時にHIGHの信号を、また異常時にはLOWの信号を当該入力端子に対して出力する。以下、このpinから故障出力対策基板1に対してHIGHからLOWの信号の立ち下がりの信号入力をCPUリセット入力という。   Also, one of the pins of the CPU 40 is electrically connected to the input terminal of the terminal portion 2 provided on the failure output countermeasure board 1 of the present invention via a wiring (hereinafter referred to as “pin”). When the CPU 40 is normal, a HIGH signal is output to the input terminal, and when the CPU 40 is abnormal, a LOW signal is output to the input terminal. Hereinafter, the signal input of the falling edge of the HIGH to LOW signal from the pin to the failure output countermeasure board 1 is referred to as CPU reset input.

次に、故障対策基板1の回路素子の動作状態を主に図2(b)を用いて説明する。
なお、図2(a)は、監視制御装置10(火災受信装置10)の電源投入時のCPUリセット入力および充電コンデンサC1、C2の充電電圧および故障移信出力(トランジスタDTC−1のベース電圧)の波形図であり、図2(c)は、CPUが故障状態から正常状態に復旧する場合の各波形図である。
Next, the operation state of the circuit elements of the failure countermeasure board 1 will be described mainly with reference to FIG.
2A shows the CPU reset input and the charging voltage of the charging capacitors C1 and C2 and the failure transfer output (the base voltage of the transistor DTC-1) when the power of the monitoring control device 10 (fire receiving device 10) is turned on. FIG. 2C is a waveform diagram when the CPU recovers from a failure state to a normal state.

CPU40の暴走などの故障をWDT50が検出すると、CPU割り込みによってCPU40はリセットされ、CPU40のpinから故障出力対策基板1の入力端子(端子部2)にCPUリセット入力がある(図1および図2(b))。   When the WDT 50 detects a failure such as a runaway of the CPU 40, the CPU 40 is reset by a CPU interrupt, and a CPU reset input is present from the pin of the CPU 40 to the input terminal (terminal portion 2) of the failure output countermeasure board 1 (FIGS. 1 and 2). b)).

CPUリセット入力により、故障出力対策基板1のトランジスタDTA1(本発明の電流出力回路部)がONし(駆動して増幅電流を出力し)、R2およびC1からなる積分回路に充電される(本発明の充電回路部)。
図2(b)のように、CPUリセット入力はパルス幅100msのパルスであり、WDT50の設定により3秒ごとに入力する。また、積分回路のR2およびC1の定数は、最初のCPUリセット入力から合計4回のCPUリセット入力(CPUリセットパルス入力)がなされた場合であって、かつ、約11.6秒間でC1が充電される(飽和状態になる)ように設定されている。
By the CPU reset input, the transistor DTA1 (current output circuit unit of the present invention) of the failure output countermeasure board 1 is turned on (driven to output an amplified current), and charged to the integrating circuit composed of R2 and C1 (the present invention). Charging circuit section).
As shown in FIG. 2B, the CPU reset input is a pulse having a pulse width of 100 ms, and is input every 3 seconds depending on the setting of the WDT 50. Further, the constants of R2 and C1 of the integration circuit are obtained when the CPU reset input (CPU reset pulse input) is made four times in total from the first CPU reset input, and C1 is charged in about 11.6 seconds. Is set (saturated).

C1が充電されるとコンパレータCMP1(本発明の比較回路部)の基準電圧を超えて、IC3に内蔵されたCMP1が出力(ON)し、CMP1の出力により、続けてDTA2、CMP2、DTA3およびDTC1(本発明の移信出力回路部)が出力(ON)する(図1および図2)。   When C1 is charged, the reference voltage of the comparator CMP1 (comparison circuit unit of the present invention) exceeds the reference voltage, and the CMP1 built in the IC3 outputs (ON), and DTA2, CMP2, DTA3 and DTC1 are continuously output by the output of CMP1. (Transfer output circuit section of the present invention) outputs (ON) (FIGS. 1 and 2).

DTC1が出力(ON)することにより(図2(b)のDTC1−B)、リレーRL1が駆動し、接点RL’1を閉じる(本発明の移信出力回路部)。   When DTC1 outputs (ON) (DTC1-B in FIG. 2B), relay RL1 is driven and contact RL'1 is closed (transfer output circuit section of the present invention).

したがって、本発明の故障出力対策基板1を監視制御装置10に設けることにより、瞬間的なノイズ等により発生するCPUリセット入力を除外し、連続してCPUリセット入力があった場合のみ外部の防犯監視装置へ故障移信出力を行う構成としたため、確実なCPUの故障検出を行うことができる。   Therefore, by providing the failure control board 1 of the present invention in the monitoring control device 10, the CPU reset input generated due to instantaneous noise or the like is excluded, and only when there is a continuous CPU reset input, an external crime prevention monitoring is performed. Since the failure transfer output is made to the apparatus, it is possible to reliably detect the failure of the CPU.

また、本発明は、既設の監視制御装置やソフトウェア変更が容易ではないシステムの監視制御装置にCPU故障出力の不具合が生じた場合に本発明の故障出力対策基板1を設置することによっても効果が顕著である。   The present invention is also effective by installing the failure output countermeasure board 1 of the present invention when a failure of CPU failure output occurs in an existing monitoring control device or a monitoring control device of a system where software change is not easy. It is remarkable.

なお、本実施例においては、CPUリセットパルスの立ち下がりを検出する回路構としたが、CPUリセットパルスの立ち上がりを検出する回路構成としてもよい。   In the present embodiment, the circuit structure for detecting the falling edge of the CPU reset pulse is used. However, the circuit structure for detecting the rising edge of the CPU reset pulse may be used.

1 故障移信出力制御回路基板(故障出力対策基板)
2 端子
3 IC3
10 監視制御装置
20 CPU基板
40 IC2
1 Fault transfer output control circuit board (fault output countermeasure board)
2 terminals 3 IC3
10 Monitoring and Control Device 20 CPU Board 40 IC2

Claims (1)

監視制御装置のCPU基板から出力されるCPUリセットパルス入力の立ち上がり又は立ち下がりを検出して故障移信出力を行う故障移信出力制御回路基板であって、
前記CPUリセットパルス入力によって駆動して電流を出力する電流出力回路部と、該電流出力回路部の出力電流を所定時間内に充電する充電回路部と、前記充電回路部の充電電圧が所定の基準電圧を越えるとHIGHの電圧を出力する比較回路部と、該比較回路部からの出力を受けて故障移信出力する移信出力回路部とを備えたことを特徴とする故障移信出力制御回路基板。
A failure transfer output control circuit board that detects a rising or falling edge of a CPU reset pulse input that is output from the CPU board of the monitoring control device and performs a failure transfer output,
A current output circuit unit that outputs current by driving with the CPU reset pulse input, a charging circuit unit that charges the output current of the current output circuit unit within a predetermined time, and a charging voltage of the charging circuit unit is a predetermined reference A failure transfer output control circuit comprising: a comparison circuit unit that outputs a HIGH voltage when exceeding a voltage; and a transfer output circuit unit that receives an output from the comparison circuit unit and outputs a failure transfer output. substrate.
JP2009078215A 2009-03-27 2009-03-27 Circuit board for control of failure transfer signal output due to cpu reset Pending JP2010231490A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101584009B1 (en) 2014-11-12 2016-01-19 현대자동차주식회사 Method for preventing malfunction of failure diagnosis circuit
CN108646715A (en) * 2018-06-13 2018-10-12 中国北方发动机研究所(天津) A kind of microcontroller failure restarts circuit automatically

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0452900A (en) * 1990-06-15 1992-02-20 Nohmi Bosai Ltd Apparatus for fire informing equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0452900A (en) * 1990-06-15 1992-02-20 Nohmi Bosai Ltd Apparatus for fire informing equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101584009B1 (en) 2014-11-12 2016-01-19 현대자동차주식회사 Method for preventing malfunction of failure diagnosis circuit
CN108646715A (en) * 2018-06-13 2018-10-12 中国北方发动机研究所(天津) A kind of microcontroller failure restarts circuit automatically

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