JPH055633A - Abnormal information recording device - Google Patents

Abstract

PURPOSE:To obtain an abnormal information recording device with which the cause of a fault can be easily examined without reproducing the fault. CONSTITUTION:This abnormal information recording device 2 is constituted of a recording section 3 which can respectively record a plurality of status signals indicating the operating status of equipment 1 provided with a control section 1d which detects the abnormality of the equipment 1 and, at the same time, stops the operation of the equipment 1 when the status signals exceed a preset allowable range by inspecting the status signals and a record control means 4 which records the status signals including other status signals from which no abnormality is detected in the recording section 3 upon receiving an abnormality detecting signal.

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 the failure of a failed device. ..

[0002]

2. Description of the Related Art Generally, in order to maintain equipment and ensure safety, failure detection and abnormal stop control are performed, and
When the equipment is stopped due to an abnormality, the details of the failure are displayed. And, so that the failure occurrence can be accurately grasped and recognized,
A failure storage device for storing the detected failure content is provided. Equipment such as a water heater, which requires temperature control according to a user's delicate requirements, is provided with a heat generating means, a heat exchanging means, a flow rate adjusting means, and the like, and requires complicated control of heating amount, water amount, and the like. Further, since it is necessary to take a reliable protection measure against user's safety and equipment maintenance due to abnormal heating at the time of erroneous operation or failure, the equipment becomes more complicated, and in case of failure, its search becomes difficult. Therefore,
Fault storage devices are often used to store the occurrence of faults. For a faulty memory device, in order to facilitate recovery measures and fault cause investigation, including repair of the fault,
Retention of contents by non-volatile memory
JP-A No. 2-4128) and other technologies have been proposed.

[0003]

However, the stored items of these failure storage devices indicate the detected abnormal item, that is, the result of the abnormality caused by the failure, and the cause of the failure can be estimated to some extent. However, it is difficult to find the cause with this alone, so in order to further find the cause of the failure and to find a clue for the location of the failure,
I had no choice but to reproduce the failure situation and investigate.

[0004]

In order to solve the above-mentioned problems, a recording unit capable of receiving and recording a status signal of a device, and a status signal at that time when an abnormality detection signal is received from the device An abnormality information recording apparatus is provided, which includes a recording control unit that records in the recording unit together with other state signals in which the abnormality is not detected. Also, a recording unit capable of recording a signal for a predetermined time by receiving a status signal of the device and a recording unit that sequentially updates from the oldest record after the predetermined time has elapsed and receives a device abnormality detection signal generated by the device. Constitutes an abnormality information recording apparatus having recording control means for stopping recording and recording the latest signal for a predetermined time until the abnormality is detected. In addition, a recording unit capable of receiving the status signal of the device and sequentially recording the status signal and the elapsed time information, and a combination of the elapsed time information at that time and the status signal after the status variation when the signal changes Thus, an abnormality information recording device is provided, which is provided with recording control means for recording in the recording section.

[0005]

When the abnormality control signal of the abnormality information recording device receives the abnormality detection signal from the device, the recording control means records the state signal of the device at that time in the recording unit including other signals for which the abnormality is not detected. .. The recording control means of another abnormality information recording device records the state signal of the device for a predetermined time after activation, and sequentially updates from the oldest record after the elapse of the predetermined time,
When the abnormality detection signal from the device is received, the recording is stopped, and the latest signal for a predetermined time until the abnormality is detected is recorded in the recording unit. The recording control means of still another abnormality information recording device receives the status signal of the device, and when the signal fluctuates, the elapsed time information at that time and the status signal after the status fluctuation are paired and sequentially recorded in the recording unit. ..

[0006]

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 apparatus according to the present invention is applied to a water heater, FIG. 2 is a block diagram showing a first embodiment of a recording control means, and FIG. 3 is a second embodiment. FIG. 4 is a block diagram showing an example, and FIG. 4 is a block diagram showing a third embodiment.

In FIG. 1, a water heater as a device 1 for failure monitoring is equipped with a heat generating section 1a, a heat exchanging section 1b, a flow rate adjusting section 1c, etc., and inspects for a plurality of status signals indicating their operating states. Accordingly, the control unit 1d is provided for performing abnormality detection and controlling the stop of the device when the value is outside the preset allowable range.

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

The abnormality information recording apparatus 2 according to the first embodiment is
The recording unit 3 capable of receiving and recording the status signal of each device, and the status signal at the time of receiving the device abnormality detection signal, including the other status signals for which no abnormality is detected, are both described above. A recording control unit 4 for recording in the recording unit 3 is provided.

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

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

In FIG. 2, the recording control means 4 is a device 1
In addition to the input holding unit 4a that receives the status signal input from the control unit 1d, the input monitoring unit 4b, the recording command unit 4c, the transfer unit 4d, the output holding unit 4e, and the like.

The input monitoring unit 4b receives a signal from the input holding unit 4a and monitors the presence / absence of an input. The transfer unit 4d is located between the input holding unit 4a and the output holding unit 4e, and is located in the input monitoring unit 4b.
Detects the input, it transfers the contents of the input holding unit 4a to the output holding unit 4e. The recording command unit 4c sends a control command to the recording unit 3, and the contents of the output holding unit 4e at that time are recorded in the recording unit 3. Further, the contents of the output holding unit 4e are sent to the abnormality display unit 2a.

With the above structure, when a signal is input to the input holding unit 4a of the recording control means 4, the input monitoring unit 4b detects it and the signal of the input holding unit 4a is recorded via the output holding unit 4e. It is recorded in 3.

Therefore, if the device command section 1f issues a command to stop the device in accordance with the abnormality determination when the device 1 is abnormal, and the control unit 1d outputs the status signal at that time to the abnormality information recording device 2, the status signal is obtained. The recording control means 4 of the abnormality information recording device 2 together with other state signals for which no abnormality is detected is recorded in the recording section 3. At the same time, the abnormality display section 2a is displayed on the device 1
Display the status when the error occurred.

The abnormality information recording apparatus 2 according to the second embodiment,
A recording unit 3 of FIG. 1 capable of receiving a signal of a status of the device 1 and recording a signal for a predetermined time, and a device abnormality detection signal issued by the device 1 by sequentially updating from the oldest recording after the predetermined time has elapsed. The recording control means 5 stops the recording when receiving the signal and records the latest signal for a predetermined time until the abnormality is detected.

In FIG. 3, the recording control means 5 is a device 1
Input holding unit 5 which receives the status signal from the control unit 1d of
a, an abnormal stop monitoring unit 5b for monitoring an abnormal stop signal in the signals received by the input holding unit 5a, and the abnormal stop monitoring unit 5
The cycle control unit 5c and the like control the control repeatedly at a constant time interval until the output of b is received.

The cycle control section 5c includes the input holding section 5 described above.
The transfer unit 5d for receiving the signal of a, the output holding unit 5e of the destination thereof, the signal newly sent to the output holding unit 5e are shifted so as to be sequentially forwarded prior to the transfer, and the output is held again. Shift section 5f set in section 5e, FIG.
The recording command unit 5g that outputs the control command to the recording unit 3 of FIG.

With the above configuration, the recording control means 5 of the abnormal information recording apparatus 2 sets the contents held in the output holding section 5e by the shifting section 5f by sequentially shifting and setting the signal of the input holding section 5a. It is transferred to the output holding unit 5e by 5d, the recording command unit 5g outputs a control command to the recording unit 3, and the current contents are recorded together with the contents up to the previous time.
This cycle is repeated at regular time intervals by the cycle control unit 5c until the abnormal stop monitoring unit 5b detects an abnormality.

Therefore, the abnormality information recording device 2 records the state signal of the device for a predetermined time after the start, and after the predetermined time elapses, the oldest record is sequentially updated and rewritten,
When the abnormality detection signal from the device is received, the recording is stopped, and the latest signal for a predetermined time until the abnormality is detected is recorded.

The abnormality information recording device 2 according to the third embodiment is
The recording unit 3 of FIG. 1 capable of receiving the status signal of the device 1 and sequentially recording the status signal and the elapsed time information, the elapsed time information at that time when the signal changes, and the status signal after the status change. The recording control means 6 for performing recording on the recording section 3 in pairs is provided.

In FIG. 4, the recording control means 6 includes, in addition to an input holding section 6a for receiving a status signal, a fluctuation monitoring section 6b and a recording command section 6c of a control system, a clock section 6d of a data system,
The transfer unit 6e and the output holding unit 6f are included.

The fluctuation monitoring section 6b monitors the fluctuation of the status signal of the device 1 received by the input holding section 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 section 6d counts the elapsed time after the start-up, and outputs elapsed time information at that time in response to the fluctuation detection issued by the fluctuation monitoring section 6b. The transfer unit 6e sends a pair 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 it to the recording unit 3.

With the above arrangement, the recording control means 6 receives the status signal of the device 1 in the input holding section 6a, the fluctuation monitoring section 6b detects the fluctuation when the signal fluctuates, and the transfer section 6e detects the elapsed time information at that time. And the status signal after the status change are sent to the output holding section 6f as a set from the timer section 6d and the input holding section 6a. The recording command unit 6c sends a control command to the recording unit 3.

Therefore, the elapsed time information and the status signal after the status change are paired and recorded in the recording section 3 via the output holding section 6f of the recording control means 6 at that time, and when the signal further fluctuates, it is repeated. Then, the recording is sequentially performed in the recording unit 3.

[0028]

As described above, according to the present invention,
The recording control means of the abnormality information recording device records the state signal of the device at that time, including other signals for which no abnormality is detected, in the recording unit when the device is abnormal.

The recording control means of another abnormality information recording device records the latest signal for a predetermined time until the abnormality is detected in the recording section.

Since the recording control means of still another abnormality information recording apparatus records the elapsed time information when the state of the equipment changes and the state signal after the state change as a set, the recording is performed sequentially in the recording section.
The state of the device at the time of failure, the state immediately before the failure, and the change in the status before the failure are not lost.

Therefore, by inspecting a plurality of status signals indicating the operating state of the equipment, the contents of the recording portion are detected when the equipment having the control unit for detecting the abnormality and controlling the stop of the equipment is stopped due to a failure. By reading out, it is possible to know the situation at the time of failure occurrence without reproducing the failure of the device. This enables the identification of the faulty part,
And the cause of the failure can be investigated efficiently.

[Brief description of 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 a first embodiment of recording control means.

FIG. 3 is a block diagram showing a second embodiment of the same.

FIG. 4 is a block diagram showing a third embodiment of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Equipment 2 ... Abnormality information recording device 3 ... Recording part 4 ... Recording control means 4d ... Input monitoring part 5 ... Recording control means 5b ... Abnormal stop monitoring part 5f ... Shift part 6 ... Recording control means 6b ... Fluctuation monitoring part 6d ... Clock part

Claims (1)

Claims: 1. A control for inspecting a plurality of status signals indicating an operating state of a device to detect an abnormality and deactivate the device when it is out of a preset allowable range. In a device including a unit, a recording unit capable of receiving a status signal of the device and recording the signal,
An abnormality characterized by comprising recording control means for recording the status signal at that time, including other status signals for which no abnormality is detected, in the recording unit when an abnormality detection signal is received from the device. Information recording device. 2. A device provided with a control section for detecting a plurality of status signals representing an operating state of the device to detect an abnormality when the condition signal is out of a preset allowable range and for controlling the stop of the device. , A recording unit capable of recording a signal for a predetermined time by receiving the status signal of the device, and a recording unit that sequentially updates from the oldest record after the predetermined time has elapsed and receives a device abnormality detection signal issued by the device And a recording control means for stopping recording and recording the latest signal for a predetermined time until the abnormality is detected. 3. A control unit for detecting abnormality when a plurality of status signals representing an operating state of the equipment are out of order and performing abnormality detection when the deviation is out of a preset allowable range, and for controlling stop of the equipment based on the abnormality detection signal. In a device provided, a recording unit capable of receiving the status signal of the device and sequentially recording the status signal and elapsed time information, and the elapsed time information at that time when there is a change in the signal and the status signal after the status change An abnormality information recording apparatus, comprising: a recording control unit configured to perform recording on the recording unit in combination with the above.