JP2614866B2 - Self-diagnosis method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-diagnosis method in a system including a lower device that receives an operation instruction from a higher device and reports an operation result via a memory in the higher device. .

[Conventional technology]

FIG. 2 shows a configuration of a conventional self-diagnosis system of this kind.
In the figure, a higher order device 1 includes a plurality of lower order devices 2-1.
２−2-n are controlled, and a command indicating the operation instruction is written in the memory 12 by the processing control unit 11 in the higher-level device 1, and the lower-level devices 2-1 to 2-n
When the command is received from the CPU, the memory 12 is accessed to read the command, and the processing corresponding to the command is executed.

Further, when a report factor to the device 1 occurs, the lower devices 2-1 to 2-n access the memory 12 in the upper device 1, write the status, and generate a status report factor in the higher device 1. Notify.

In such a system, for example, the lower device 2-1
Is instructed by the higher-level device 1 to execute a self-diagnosis, the processing controller 20-1 in the lower-level device 2-1 checks the normality of the processing units 21-11 to 21-1m in the lower-level device 2-1. The result is displayed on a self-diagnosis result display section 22-1 provided inside the apparatus. Processing control unit 20- in another lower device 2-n
Similarly, when the host device 1 is instructed to execute the self-diagnosis, the normality of the processing units 21-n1 to 21-nm is checked, and the result is displayed on the self-diagnosis result display unit 22-n.

The processing control unit 11 in the higher-level device 1 controls each lower-level device 2-
The self-diagnosis result processing is performed by reading the display contents of the self-diagnosis result display sections 22-1 to 22-n in 1-2-n.

[Problems to be solved by the invention]

In the above-described conventional configuration, since the self-diagnosis result is displayed in each of the lower devices 2-1 to 2-n, the upper device 1 prepares a procedure for reading the self-diagnosis result which is not used in the normal operation. If the internal configuration of each of the lower-level devices 2-1 to 2-n is different, a different procedure is required. Therefore, a plurality of methods must be prepared. There is a disadvantage that the processing of is complicated.

Each of the lower devices 2-1 to 2-n must also have a self-diagnosis result display unit 22-1 to 22-n that is not used in normal operation, and the amount of hardware of the lower devices 2-1 to 2-n. However, there is also a drawback that it increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional drawbacks, and an object of the present invention is to provide a self-diagnosis method in which the amount of hardware of a lower-level device can be reduced and the processing of a higher-level device can be simplified.

[Means for solving the problem]

In order to achieve the above object, the present invention provides, in a command for instructing execution of self-diagnosis from a higher-level device, a field indicating a memory address in the higher-level device for reporting a self-diagnosis result, and a command for instructing execution of self-diagnosis. The lower device that receives the command writes the self-diagnosis result to the memory area specified by the memory address in the higher device specified by the command.

[Action]

Since the lower-level device writes the self-diagnosis result to the memory in the higher-level device, the lower-level device does not need the conventional self-diagnosis result display section. Since no self-diagnosis result can be obtained, a special procedure such as a self-diagnosis result reading procedure which is not used in the normal operation is not required.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. The same reference numerals as in FIG. 2 denote the same parts, and 12-1 to 12-n store the self-diagnosis result set in the memory 12 in the host device 1. Area.

In FIG. 1, a higher-level device 1 includes a plurality of lower-level devices 2.
-1 to 2-n are controlled, and commands indicating their operation instructions are written in the memory 12 by the processing control unit 11 in the higher-level device 1, and the lower-level devices 2-1 to 2-n Upon receiving a command activation from the device 1, the device accesses the memory 12 to read the command and executes a process corresponding to the command. Also, when a reporting factor to the upper device 1 occurs, the lower devices 2-1 to 2-n access the memory 12 in the upper device 1, write the status, and generate a status reporting factor in the upper device 1. Notify.

In such a system, when the higher-level device 1 causes, for example, the lower-level device 2-1 to execute a self-diagnosis, the self-diagnosis result is set in a field provided in a command instructing the lower-level device 2-1 to perform a self-diagnosis. The address of the area 12-1 of the memory 12 for reporting the
-1 is activated.

In the lower-level device 2-1, when the command instructing execution of the self-diagnosis is started from the higher-level device 1, the processing control unit 20-1 in the lower-level device 2-1 causes the processing units 21-11 to 21-1m in the device to operate. Is checked, the result is edited, and the area 12-1 of the memory 12 indicated by the field in the above-mentioned command is checked.
Write the self-diagnosis results directly to This writing procedure is performed when the above-mentioned status report factor occurs.
This is the same as the procedure for writing the status into the memory 12.

The processing control unit 11 in the host device 1
The self-diagnosis result of the lower-level device 2-1 is obtained by reading the data in -1 to process the self-diagnosis result.
As described above, the self-diagnosis result of the lower device 2-1 is determined by reading the contents of the memory 12 in the own device, so that it is not necessary to access the lower device 2-1 to read the self-diagnosis result.

The higher-level device 1 stores an area in the memory 12 for receiving a report of the self-diagnosis result from the lower-level device 2-n in a field in a command instructing execution of the self-diagnosis to the other lower-level devices 2-n in the same manner as described above. The command is started by setting the address of 12-n, and the lower device 2-n that has received the command starts writing the self-diagnosis result to the designated area 12-n of the memory 12 in the same manner as described above. .

〔The invention's effect〕

As described above, according to the present invention, there is no need to prepare hardware such as a self-diagnosis result display unit,
The amount of hardware of the lower-level device can be reduced.

In addition, since the self-diagnosis result of the lower device is written into the memory in the upper device, the higher device can read the self-diagnosis result of the lower device in a unified procedure independent of the internal configuration of the lower device. The processing on the side becomes simple.

Further, the report destination address of the self-diagnosis result can be arbitrarily determined by the higher-level device side regardless of the type of the lower-level device connected to the higher-level device. There is also an effect that the processing method of the self-diagnosis result performed by the user can be the same.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional system. In the figure, 1... Upper device 11... Processing control unit 12... Memory 12-1 to 12-n... -N processing control unit 21-11 to 21-1m, 21-n1 to 21-nm processing unit 22-1 to 22-n self-diagnosis result display unit

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shunichi Hidaka 3-9-1, Midoricho, Musashino-shi, Tokyo Nippon Telegraph and Telephone Corporation Inside Communication Network First Research Laboratory (56) References JP-A-61-233854 (JP) , A) JP-A-50-99649 (JP, A)

Claims (1)

(57) [Claims] An apparatus includes a higher-level device and a lower-level device that receives a command indicating an operation instruction from the higher-level device and reports a status indicating an operation result to the higher-level device via a memory in the higher-level device. In the system, a field indicating a memory address in the higher-level device for reporting a self-diagnosis result is provided in a command from the higher-level device instructing execution of the self-diagnosis to the lower-level device, and the lower-level device performs the self-diagnosis execution. Receiving a command instructing the internal device, performs a diagnosis of each unit in the own device, and writes the diagnosis result in a memory area indicated by the memory address in the higher-level device specified by the received command. Diagnostic method.