JP3207874B2 - Error information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality information recording apparatus used for failure analysis, and more particularly, to an abnormality information recording apparatus capable of searching for a cause of a failure without having to reproduce a failure of a failed device. .

[0002]

2. Description of the Related Art In general, in order to maintain equipment and ensure safety, failure detection and stop control at the time of abnormality are performed.
At the time of equipment stoppage due to abnormality detection, the content of the failure is displayed. And, to be able to accurately grasp and recognize the occurrence of failure,
A failure storage device is provided for storing the content of the detected failure. Equipment that requires temperature control in response to delicate demands of users, such as water heaters, includes heating means, heat exchanging means, flow rate adjusting means, and the like, and requires complicated control relating to the amount of heating, the amount of water, and the like. Further, since it is necessary to ensure the user's safety due to abnormal heating at the time of erroneous operation or failure and to ensure protection of the equipment, etc., the equipment is further complicated, and if a failure occurs, it becomes difficult to search for it. Therefore,
A failure storage device that stores the occurrence of a failure is often used. For failure storage devices, in order to facilitate recovery measures including repair of failures and to investigate the cause of failures,
Retention of contents by non-volatile memory
Japanese Patent Laid-Open No. 2-4128) and techniques for displaying the order of occurrence (Japanese Patent Laid-Open No. 2-4128).

[0003]

However, the storage items of these failure storage devices indicate the detected abnormality item, that is, the result of the abnormality caused by the failure, and it is possible to estimate the cause of the failure to some extent. However, it is difficult to find the cause by this alone, and in order to find the cause of the failure and to find a clue to the location of the failure,
The failure situation had to be reproduced and investigated.

[0004]

In order to solve the above problems SUMMARY OF THE INVENTION, and the sequentially recordable recording unit the state signal and the elapsed time information by receiving a status signal of the device, the variation of the condition signal
When detected, an abnormality information recording device including a recording control unit that sequentially records information in the recording unit by combining the elapsed time information from the start of the device at that time and the status signal after the status change is provided. Configured.

[0005]

The recording control means of the abnormal information recording apparatus receives the state signal of the device, and when the signal fluctuates, sequentially records the elapsed time information at that time and the state signal after the state fluctuation as a set in the recording unit. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG . 1 is a block diagram showing an embodiment in which the abnormality information recording device according to the present invention is applied to a water heater, and FIG. 2 is a block diagram showing recording control means.

In FIG. 1, a water heater as a device 1 for monitoring a failure includes a heat generating portion 1a, a heat exchanging portion 1b, a flow rate adjusting portion 1c, and the like, and inspects a plurality of state signals indicating their operating states. Accordingly, the control unit 1d that detects an abnormality when the value is out of a preset allowable range and controls stop of the device is provided.

The control section 1d is connected to the comparison monitoring section 1e, the equipment command section 1f, the input operation section 1g, etc.
a, while monitoring the sensor outputs provided in the heat exchange section 1b, the flow rate control section 1c, etc., acts on the device command section 1f to comply with the request input from the input operation section 1g.

An abnormality information recording device 2 receives a status signal of the device 1 and sequentially records the status signal and elapsed time information. The recording unit 3 stores the status signal and the elapsed time information when the signal fluctuates. There is provided a recording control means 6 for performing recording in the recording section 3 in combination with the state signal after the state change.

In addition, an abnormality display unit 2a for displaying the type of abnormality by lighting, voice, etc., and a recording and reading unit 2b for reading the contents recorded in the recording unit 3 for analyzing the abnormality are attached.

The state signal of the device 1 includes, specifically, thermistor temperature, flame detection, high limit bimetal, fan setting rotation speed, fan detection rotation speed, combustion number, exhaust gas temperature, ignition / combustion operation mode, gas Information on the heat-generating part such as the proportional control valve opening, the incoming water temperature, the set temperature, the hot water temperature,
Information on the hot water on the heated side, such as the instantaneous flow rate and the pump speed.

In FIG . 2, a recording control means 6 includes, in addition to an input holding unit 6a for receiving a state signal, a fluctuation monitoring unit 6b and a recording command unit 6c of a control system, and a clock unit 6d of a data system.
It comprises a transfer unit 6e and an output holding unit 6f.

The fluctuation monitoring unit 6b monitors the fluctuation of the state signal of the device 1 received by the input holding unit 6a and issues a fluctuation detection signal. The recording command unit 6c sends a control command to the recording unit 3, and the contents of the output holding unit 6f at that time are sent to the recording unit 3.

The timer 6d counts the elapsed time after the start-up, and outputs the elapsed time information at that time in response to the detection of the change generated by the change monitor 6b. The transfer unit 6e sends a set of the elapsed time information and the state signal after the state change to the output holding unit 6f, and the output holding unit 6f outputs the set to the recording unit 3.

[0016] With this configuration, the recording control unit 6 receives the input holding portion 6a of the state signal of the apparatus 1, to detect a change monitoring section 6b that signal varies variation, the transfer unit 6e the elapsed time information at that time And the state signal after the state change is sent to the output holding unit 6f as a set from the timer unit 6d and the input holding unit 6a. The recording command section 6c sends a control command to the recording section 3.

[0017] Accordingly, recorded in the recording unit 3 outputs elapsed through the holding portions 6f time information and the condition signal after the state change becomes the set of the recording control means 6 at that time, similarly repeated further signal fluctuates Then, recording is sequentially performed on the recording unit 3.

[0018]

As described above, according to the present invention,
The recording control means of the abnormality information recording apparatus sequentially records information in the recording unit by combining the elapsed time information at the time of the state change of the device and the state signal after the state change. The progress and the change in the state up to the failure are not lost.

[0019] Thus, when the by inspecting the plurality of status signals representative of the operating state of the device, the device having a control unit for performing stop control of the device performs the abnormality detection is stopped due to a failure, the contents of the recording unit , The situation at the time of occurrence of the failure can be known without reproducing the failure of the device. As a result, identification of a failed part,
In addition, the work of investigating the cause of the failure can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment in which an abnormality information recording device according to the present invention is applied to a water heater.

FIG. 2 is a block diagram showing an embodiment of a recording control unit.

[Description of Signs] 1 ... Device 2 ... Abnormal information recording device 3 ... Recording unit 6 ... Recording control means 6b ... Change monitoring unit 6d ... Time measuring unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-42309 (JP, A) JP-A-2-59887 (JP, A) JP-A-2-106028 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) G01D 21/00 F23N 5/26 G05B 23/02 302

Claims (1)

(57) [Claims] 1. A control unit for detecting a plurality of state signals indicating an operation state of a device to detect an abnormality when the value is out of a preset allowable range and performing a stop control of the device based on the abnormality detection signal. A recording unit capable of sequentially recording the status signal and the elapsed time information in response to the status signal of the device , and detecting a change in the status signal and activating the device at that time. A set of the elapsed time information from the later and the state signal after the state change is set in the recording unit.
An abnormal information recording device comprising a recording control means for sequentially recording.