JPS63116244A - Self-diagnosing system - Google Patents

Abstract

PURPOSE:To execute self-diagnosis in a required diagnosing range and to shorten a time required for the self-diagnosis by selecting a program execution range to be the size of self-diagnosis in accordance with the attribute of an initializing signal. CONSTITUTION:When an initializing signal 10 is inputted to a signal width detecting circuit 2, the signal width is recognized by a signal width detecting clock 15 and any one of execution pointers in an execution pointer storing register 4 is selected. At the time of selecting one on the execution pointers (a)-(d), a diagnosing program 5 is selected in accordance with the instruction of the selected pointer. For instance, the signal width of an initializing signal generated at the time of turning on a power supply is different from that of an initializing signal based upon an initializing instruction. Thereby, the execution pointer (a) or (c) is respectively selected at the time of turning on the power supply or at the time of outputting the initializing instruction to switch the diagnosing range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to self-diagnosis means for a control section of a data processing device.

〔overview〕

The present invention provides means for executing self-diagnosis in response to an incoming initialization signal, by selecting a program execution range corresponding to the scale of the self-diagnosis in accordance with the attributes of the initialization signal. This is to shorten the time required for self-diagnosis by performing diagnosis.

[Conventional technology]

Conventionally, a control device incorporating this type of self-diagnosis means always executes a built-in self-diagnosis program from the beginning based on an initialization signal generated when the device is powered on or initialized.

[Problem that the invention seeks to solve]

Since such conventional self-diagnosis means always execute the diagnostic program from the beginning, if the scope of self-diagnosis is wide, the time required for diagnosis becomes long and the device cannot be used immediately.

The present invention aims to eliminate such drawbacks and provides a self-diagnosis method that can immediately perform a desired diagnosis.

[Means for solving problems]

The present invention provides a self-diagnosis method comprising a storage means for storing a program and a self-diagnosis means for executing a self-diagnosis according to the contents of the program extracted from the storage means, in which the above-mentioned program includes a plurality of self-diagnosis methods. Different ranges are set for the initialization signal, and different attributes are set for the initialization signal corresponding to the different ranges of this program, and the range of the program corresponding to the attributes of this initialization signal is extracted and used for the self-diagnosis means. The invention is characterized in that it is equipped with a control means to give.

Preferably, the attribute of the initialization signal is the signal width of this signal.

[For production]

The attributes of the initialization signal are set depending on the range of programs to be executed. This attribute is, for example, the signal width of the signal.

When the attribute of the incoming initialization signal is detected, the corresponding program range is transferred from the storage means to the control means, and the control means executes a self-diagnosis.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

The figure is a block configuration diagram showing the configuration of an embodiment of the present invention.

When the initialization signal 10 is input to the signal width detection circuit 2, the signal width is recognized by the signal width detection clock 15, and one of the execution pointer storage registers 4 is selected. When one of the execution pointers a, b, c, and d is selected, the diagnostic program 5 is executed according to that instruction. For example, since the signal width of the initialization signal generated when the power is turned on is different from the signal width of the initialization signal generated by the initialization command, execution pointer a is selected when the power is turned on, and execution pointer C is selected when the initialization command is issued, and the diagnostic range is Can be switched.

〔Effect of the invention〕

As described above, the present invention switches the execution range of self-diagnosis according to the signal width of the initialization signal, and therefore has the effect of shortening the diagnosis time as necessary without degrading the diagnostic function.

[Brief explanation of the drawing]

The figure is a block configuration diagram showing the configuration of an embodiment of the present invention. ■...Control device, 2...Signal width detection circuit, 3...
Clock generation circuit, 4... Execution pointer storage register, 5... Diagnostic program, 1o... Initialization signal, 1
5... Clock for signal width detection, a-d... Execution pointer. Agent Patent Attorney Nao Takashi Ide Structure diagram of practical example

Claims (2)

[Claims] (1) In a self-diagnosis method comprising a storage means for storing a program and a self-diagnosis means for executing a self-diagnosis according to the contents of the program extracted from the storage means, the above program is configured to carry out multiple self-diagnosis tests. Different ranges are set, and the initialization signal has different attributes set corresponding to the different ranges of this program, and the range of the program corresponding to the attributes of this initialization signal is extracted and given to the self-diagnosis means. A self-diagnosis method characterized by being equipped with a control means. (2) The self-diagnosis method according to claim (1), wherein the attribute of the initialization signal is the signal width of this signal.