JPH0512144A - I/o module diagnostic system - Google Patents

Abstract

PURPOSE:To arbitrarily confirm the normality of an I/O module connected to a control module via a common bus without interrupting system operation. CONSTITUTION:The I/O module 1 is provided with a timer 14 and a common memory 13 to which processing progress information retention areas are indexed. When a processor 12 receives an I/O command from a control module 2 and starts the processing of the command, the name of the I/O command and the processing start time are written in the processing progress information retention area. When planned processing time of the issued I/O command has reached, the control module 2 instructs a diagnostic command. Receiving the diagnostic command, the I/O module 1 transmits current time and the processing start time to the control module 2. The control module 2 discriminates the normality of the I/O module from both of the transferred time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an I / O module diagnostic method, and more particularly to normal processing of an I / O module of an information processing system in which at least one I / O module is connected to a control module via a common bus. I to confirm sex
/ O module diagnostic method.

[0002]

2. Description of the Related Art Conventionally, in this type of I / O module diagnostic method, a self-diagnosis program built in the I / O module is executed when the system is started up, The diagnostic program for the O module is executed, and the test I / O command is issued to confirm the normality.

[0003]

DISCLOSURE OF THE INVENTION The conventional I / O described above
The module diagnosis method has a problem that the built-in self-diagnosis method can diagnose only when the system is started at power-on, and the higher-level processor can diagnose only when the module is on standby. There is.

[0004]

According to the I / O module diagnosis method of the present invention, at least one I / O module is connected to a control module via a common bus, and an I / O command is issued from the control module. In the I / O module diagnostic method of the information processing system that causes the I / O module to execute input / output processing, the I / O module includes a data transfer unit that transmits and receives data between the common bus and the I / O module. A processor for executing the process, a timer for outputting the time, and a memory means for holding the name of the I / O command and the process start time when the processor starts the process in response to the I / O command, When the processor receives the diagnostic command issued from the control module, it controls the processing start time and the current time held in the memory means. And a communication means for returning the Lumpur,
The control module is constituted by having a judging means for judging the normality of the operation of the I / O module from the processing start time and the current time obtained by the communication means, and the memory means is provided in the control module. When the processor receives an I / O command and starts processing, I / O
A memory means for holding the name of this I / O command transferred from the O module and the processing start time, and when the communication means receives the diagnostic command issued by the control module from the processor, the current time is sent to the control module. The control module is a communication means for returning, and is constituted by having a judging means for judging the normality of the operation of the I / O module from the processing start time held in the memory means and the current time obtained by the communication means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, 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 block diagram of FIG. 1 shows a case where one I / O module 1 and one control module 2 are connected to a common bus 3, and the I / O module 1 is a common bus 3.
Data transfer means 11 and a processor 12 connected to
, The shared memory 13 and the timer 14 are connected to the local bus 1
It is configured to be connected to 5.

The processor 12 performs input / output processing of the I / O module 1, and the shared memory 13 is a memory shared by the I / O modules 1. As shown in FIG. A holding area 132 is assigned.

FIG. 3 is a diagram showing an example of a procedure when the control module of FIG. 1 performs an I / O process. The operation of FIG. 1 will be described when the I / O process is performed by the procedure of FIG. The control module 2 issues the first I / O command A according to the procedure of FIG. The I / O command A is sent to the processor 12 via the common bus 3 and the data transfer means 11.
Given to. The processor 12 starts the input / output processing according to the given I / O command A, and writes that the I / O command is A in the processing progress information holding area 132 via the local bus 15. Further processor 1
2 reads the time t from the timer 14 and similarly writes the process start time t in the process progress information holding area 132. The information written in the shared memory 13 is stored as processing progress information without being erased at least during the processing period of the I / O command A. Therefore, if some trouble occurs in the I / O module 1 or the I / O device connected to the I / O module 1 and the processing is started and does not end, the control module 2 uses the monitoring function in the module. , The diagnostic command for the I / O command A is issued, knowing that the end information cannot be obtained over the time 20 ms required for the processing shown in the procedure table shown in FIG. When this diagnostic command is given to the processor 12 via the common bus 3 and the data transfer means 11, the processor 12 knows that it is a diagnostic command for the I / O command A, and the timer 14 indicates the current time, for example, t +.
40 ms is read, and the elapsed time t + 40 is displayed in the communication area 131.
ms is written, and the processing start time t written in the processing progress information holding area 132 is transferred to the communication area 131. Next, the processor 12 transfers the contents of the communication area 131 to the control module 2 via the data transfer means 11 and the common bus 3. The control module 2 determines that an abnormality has occurred in the I / O module 1 because the processing is not completed even after the processing time of 20 ms has passed in the I / O module.

In the above embodiment, the processing progress information holding area and the communication area are provided in the shared memory in the I / O module,
The processing start time and the current time are set in the communication area and then transferred to the control module. However, only the processing progress information holding area is provided in the I / O module, and the timer is read at the read processing start time. It is also possible to add the current time and immediately transfer it to the control module.

In the above embodiment, the processing start time and the current time are respectively transferred to the control module. However, the processing start time is subtracted from the current time in the processor and only the processing elapsed time is transferred to the control module. You can also do it.

Furthermore, in the above embodiment, the processing progress information holding area is provided in the shared memory of the I / O module. However, the processing progress information holding area is provided in the shared memory of the control module and the I / O module is provided. It is also possible to transfer the processing start time, the current time, etc. from the O module to the processing progress information holding area in the control module via the data transfer means and the common bus, and the control module can directly read these times as necessary. it can.

In the above embodiment, the I / O module writes only the process start time in the process progress information area, but the retry time executed by the I / O module is written and these times are also written. It can also be transferred to the control module and used as auxiliary information for abnormality determination.

[0013]

As described above, according to the present invention, the processing progress information holding area is provided in the shared memory, and the time when the I / O module actually starts the I / O command is written and the control module writes the time. By notifying the control module of the start time together with the current time when the inquiry about the processing status is received, the control module can accurately determine the normality of the I / O module.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing allocation of the shared memory in FIG.

FIG. 3 is a diagram showing an example of an I / O command issued by the control module of FIG. 1 in an I / O process.

[Explanation of symbols]

1 I / O module 2 control module 3 common buses 11 Data transfer means 12 processors 13 shared memory 14 timer 15 Local Bus

Claims (2)

[Claims] 1. An information processing system in which at least one I / O module is connected to a control module via a common bus, and the control module issues an I / O command to cause the I / O module to execute input / output processing. In the I / O module diagnosing method described above, the I / O module includes a data transfer unit that transmits and receives data between the common bus and the I / O module, a processor that executes the process, and a timer that outputs the time. When the processor receives an I / O command and starts processing, a memory means for holding the name of the I / O command and the processing start time, and when the processor receives a diagnostic command issued from the control module A communication means for returning the processing start time and the current time held in the memory means to the control module,
The I / O module diagnosis system, wherein the control module has a judging means for judging the normality of the operation of the I / O module from the processing start time and the current time obtained by the communication means. 2. The name of the I / O command transferred from the I / O module when the memory means according to claim 1 is provided in the control module and the processor starts processing upon receiving the I / O command. And a processing start time, the communication means is a communication means for returning the current time to the control module when the communication means receives a diagnostic command issued by the control module from the control module. 2. The I / O module diagnosis system according to claim 1, further comprising a judging unit for judging the normality of the operation of the I / O module from the held processing start time and the current time obtained by the communication unit.