JPH024126A - Failure memory device for combustion apparatus - Google Patents

Abstract

PURPOSE:To allow holding of the contents of failures stored even when the power is not supplied to a failure memory device by writing the contents of failures to a non-volatile memory. CONSTITUTION:When a failure detecting device 4 detects a failure, a signal corresponding to the content of the failure is input to a microcomputer 2, and a writing device 2a writes the content of the failure to a non-volatile memory 3. On the other hand, every time a switch 6 is pressed to display the written content of the failure on a failure annunciator 5, a reading device 2b of the microcomputer reads the content of the failure from the non-volatile memory, and a failure annunciator operating device 2c outputs the content of the failure to the failure annunciator to display it. The non-volatile memory requires power supply to write, however, power supply is not necessary to hold the contents of failures written so that the contents of failures are not lost even if the power supply is cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention stores the details of the failure when a failure occurs in a combustion appliance,
This invention relates to a failure storage device that retains its stored contents even when the power of the appliance is turned off.

BACKGROUND OF THE INVENTION In recent years, combustion appliances and the like have self-diagnosis devices, and are equipped with fault storage devices that store and display the details of the fault when a fault occurs. Conventional fault storage devices use volatile memory that can retain fault contents by supplying power to the memory.

Problems to be Solved by the Invention However, in conventional configurations, volatile memory is used to store fault details, so if power is no longer supplied to the volatile memory, all stored fault details are lost. Put it away. Therefore, there is a problem in that once the power is turned off for reasons such as resolving a malfunction in the appliance, all the details of the past malfunction are lost.

In view of the above problems, the present invention provides a failure storage device that retains stored failure details even when power is not supplied to the failure storage device.

Means for Solving the Problems In order to solve the above problems, a fault storage device of the present invention includes a non-volatile memory, a fault content writing means for writing failure details of an appliance into the non-volatile memory, and The fault content reading means reads the fault content written by the fault content writing means.

Operation According to the present invention, the details of the failure of the appliance are stored in the nonvolatile memory with the above-described configuration, so that the details of the failure are retained even if power is not supplied to the failure storage device.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

The figure is a configuration diagram showing an embodiment of the present invention. In FIG. 1, 1 is a power supply, 2 is a microcomputer, 3 is a nonvolatile memo IJ-14, a failure detection device, and 5 is a failure display device. The microcomputer 2 shown here includes a CPU,
It has ROM, RAM, and input/output section, and can write to non-volatile memory.

It is a so-called one-chip microcomputer that has a reading means. The microcomputer 2 is composed of a fault content writing means 2a, a fault content reading means 2b, a fault display driving means 2c, and others.

In the above embodiment, when the failure detection device 4 detects a failure, it outputs a signal corresponding to the detected failure details to the microcomputer 2. The microcomputer 2 receives the signal from the failure detection device 4 and writes the failure details writing means 2.
a writes the details of the failure to the nonvolatile memory 3. on the other hand,
The switch 6 is a changeover switch for displaying the contents written in the non-volatile memory 3 on the failure display device 5, and each time the switch 6 is pressed, the microcomputer 2
The fault content reading means 2b reads the fault content from the non-volatile memory 3, and the fault display driving means 2 receives the fault content.
C outputs the details of the failure to the failure display device 5. The failure display device 5 displays the details of the failure according to the output signal from the microcomputer 2. Although power needs to be supplied to the nonvolatile memory 3 when writing, power is not required to retain the written fault details, so it is necessary to turn off the device once for reasons such as clearing the device from a fault. Even if the power is turned off, the details of the failure will not be lost.

Effects of the Invention As described above, the fault content storage device of the present invention has a structure in which the fault content is written in the first place in the non-volatile memory.
The power supply is not required to retain the written failure details, and the failure details are not lost even if the appliance is turned off once for reasons such as canceling the failure of the appliance. Therefore, even after the failure of the appliance has been resolved, the past failure history can be traced, which is useful for maintenance of the appliance.

[Brief explanation of the drawing]

The figure is a configuration diagram showing an embodiment of the failure storage device of the present invention. 2a...Fault content writing means, 2b...
...Fault content reading means, 3...Nonvolatile memo IJ-14...Fault detection device, 5...
Fault display device, 5... switch.

Claims (1)

[Claims] A combustion appliance comprising a nonvolatile memory, a failure content writing means for writing failure details of the appliance into the nonvolatile memory, and a failure content reading means for reading the fault content written by the failure content writing means from the nonvolatile memory. Fault storage.