JP2600499B2 - Fault alarm output method and circuit for peripheral control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and a circuit for outputting a fault alarm of a peripheral control device.

[0002]

2. Description of the Related Art As a conventional fault alarm output method and circuit of a peripheral control device, when a fault occurs in a peripheral control device and a peripheral device, the number of times of the fault is counted and exceeds a predetermined count value. Sometimes a special report is made to the central processing unit.

[0003]

The above-mentioned conventional method and circuit for outputting a fault alarm of a peripheral control device count the number of faults, and when the count value exceeds a predetermined count value, a special value is output. Since the report is sent to the central processing unit, the frequency of occurrence of failures with respect to the number of commands from the central processing unit is not known, which means that failures where the same error is repeated intermittently are not possible. Has occurred,
The problem that the discovery of a failure is delayed when recovery is performed by hardware or software retries, or when the number of failures does not immediately exceed a predetermined value in a system with a small number of startups There is a point.

[0004] An object of the present invention is to provide a system in which a fault in which the same error is repeated intermittently occurs, but is recovered by a hardware retry or a software retry, and is superficially normal. Peripheral control that can be applied to a system in which the number of faults does not immediately exceed a predetermined value due to the small number of times, to detect signs of a fault before a major fault occurs and take preventive maintenance measures An object of the present invention is to provide a method and a circuit for outputting a fault alarm of a device.

[0005]

A fault alarm output method for a peripheral control device according to the present invention is a fault alarm output method for a peripheral control device connected to a central processing unit for controlling the peripheral device. At the end of the connection control process of the peripheral device, analysis and editing of the error content occurring in the peripheral device and the peripheral control device during the connection control process are performed, and the error content is temporarily stored. Analyzes and edits the details of the error newly generated during the connection control process in accordance with the command of the central processing unit, performs comparison and collation with the temporarily stored error content, and detects the same error if the same error is detected. The number of receptions of the instruction of the processing device is counted until the same error as the temporarily stored error content is detected again, and when the counted value is within a predetermined value. It is configured to output a failure alarm to predict failure the central processing unit.

A fault alarm output method for a peripheral control device according to the present invention analyzes and edits the details of an error newly generated during connection control processing in accordance with a command from a central processing unit, and compares it with the temporarily stored error contents. When the same error is detected, the number of receptions of the command from the central processing unit is counted until the same error as the temporarily stored error content is detected again. If the value is equal to or more than the value, it is determined to be normal and the number of times that this normality is detected is counted.If the predetermined number of times of normality is detected, the temporarily stored error content is deleted, and when a new error is detected, You may temporarily store and count the number of times the central processing unit receives the command.

A fault alarm output circuit for a peripheral control device according to the present invention is a fault alarm output circuit for a peripheral control device connected to a central processing unit for controlling the peripheral device. At the end of the connection control process, an error analysis unit that analyzes and edits the error content generated in the peripheral control device and the peripheral device during the connection control process, and temporarily stores the error content analyzed by the error analysis unit. An error storage unit, the error analysis unit analyzes and edits the content of an error newly generated during the next and subsequent connection control processing, and compares and compares the error content output and the error content temporarily stored in the error storage unit. An error comparing unit to perform, and a coincidence signal output when the error comparing unit detects the same error. After reading the count value of the counter unit having a counting function at this time, the count value of the counter unit is returned to zero, and if the read count value is within a predetermined value, the occurrence of a failure is predicted. A fault alarm is output to the central processing unit, and when the read count value is equal to or greater than a predetermined value, it is determined that the count is normal, and the number of times that the normality is detected is internally counted to determine the normality of the predetermined number of times. And a failure alarm output section for outputting an erasure signal to the error storage section upon detection and erasing the temporarily stored error content.

[0008]

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

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

[0010] The central processing unit 1 is connected to a peripheral control device 3 for controlling the peripheral device 2. The fault alarm output circuit 4 in the peripheral control device 3 receives the command of the central processing unit 1 and, when the connection control process of the peripheral device 2 is completed, the peripheral device 2 and the peripheral control device 3 during the connection control process. An error analysis unit 5 for analyzing and editing the content of the error that has occurred,
An error storage unit 6 for temporarily storing the error content analyzed by the error analysis unit 5, an error content for the error analysis unit 5 to analyze and edit a newly generated error content during the next and subsequent connection control processes, and output the error content. An error comparison unit 7 that performs comparison and collation with the error content temporarily stored in the error storage unit 6 earlier.
A counter unit 8 having a function of receiving a coincidence signal output when the error comparison unit 7 detects the same error, and counting the number of times commands have been received from the central processing unit 1, and a counter unit 8
After reading the count value at this point, the count value of the counter unit 8 is returned to zero, and if the read count value is within a predetermined value, the occurrence of a fault is predicted and the central processing unit 1 is notified of a fault alarm. Is output, and when the read count value is equal to or more than a predetermined value, it is determined to be normal, and the number of times that this normality is detected is counted internally, and if the predetermined number of normalities is detected,
A failure alarm output unit 9 for outputting an erasure signal to the error storage unit 6 and erasing the error content temporarily stored earlier is provided.

Next, the operation will be described.

When an error occurs in the peripheral device 2 and the peripheral control device 3 during the connection control process, the error analysis unit 5
The contents of the error are analyzed and edited, a status byte is created and stored in the error storage unit 6. At this time,
The flag 10 provided in the error storage unit 6 indicates that the space is empty, and when the status byte is stored, the flag 10 indicates that the space is closed. External storage in the error storage unit 6 is enabled only when the flag 10 indicates empty.

Next, when an error occurs in the peripheral device 2 and the peripheral control device 3 during the connection control process, the error analysis unit 5 analyzes and edits the content of the error and creates a status byte. Since the flag 10 provided in the unit 6 indicates that the flag is closed, the storage operation is not performed, and the new status byte is input to the error comparison unit 7. When receiving the status byte from the error analysis unit 5, the error comparison unit 7 receives the corresponding status byte from the error storage unit 6, compares the status bytes and confirms a match, and determines whether these status bytes match. If so, the coincidence signal is output to the fault alarm output unit 9.
Output to Upon receiving the coincidence signal, the failure alarm output unit 9
After reading the count value at this time from the counter unit 8, the count value of the counter unit 8 is returned to zero, and if the read count value is within a predetermined fixed value, the occurrence of a failure is predicted and the central processing unit 1 outputs a fault alarm. If the read count value is equal to or greater than a predetermined value, it is determined that the count value is normal, and the number of times the normality is detected is counted by a counting unit provided inside. The number of times counted by this counting unit is a predetermined number within 10 times. If normality is detected by this number of times, it is determined that there is no failure in the error stored in the error storage unit 6 and a new error is detected. In order to observe the error, an erasure signal is output to the error storage unit 6 to erase the error content temporarily stored earlier. At this time, the flag 10 provided in the error storage unit 6 also indicates that the space is empty.

[0014]

As described above, according to the present invention, at the end of the connection control processing of the peripheral device, which is performed by receiving the instruction of the central processing unit, the peripheral device and the peripheral control device generate during the connection control process. Analyze and edit the error details,
The contents of the error are temporarily stored, the contents of the error newly generated during the connection control process in accordance with the command of the central processing unit are analyzed and edited, and the contents of the error are temporarily compared with the temporarily stored contents of the error. If an error is detected,
The number of instructions received from the central processing unit is counted until the same error as that previously stored is detected again, and if the counted value is within a predetermined value, the occurrence of a failure is predicted. A system in which the same error is intermittently repeated by outputting a fault alarm to the central processing unit has occurred, but the system is superficially normal because it has been recovered by hardware or software retries Also, it can be applied to a system in which the number of failures does not immediately exceed a predetermined value due to the small number of startups, find signs of failure before a major failure occurs, and take preventive maintenance measures There is an effect that.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central processing unit 2 Peripheral device 3 Peripheral control device 4 Fault alarm output circuit 5 Error analysis unit 6 Error storage unit 7 Error comparison unit 8 Counter unit 9 Fault alarm output unit

Claims (3)

(57) [Claims] In a fault alarm output method for a peripheral control device connected to a central processing unit and controlling a peripheral device, a command from the central processing unit is received, and when the connection control process for the peripheral device ends, the connection control process is performed. Analyzes and edits the details of the error that has occurred in the peripheral device and the peripheral control device, temporarily stores the error content, and newly generates the error content that has occurred during the connection control process according to the command of the central processing device from the next time. Analysis and editing of the data, comparison and collation with the temporarily stored error content are performed, and when the same error is detected, the number of receptions of the command of the central processing unit after that is the same as the temporarily stored error content. The error is counted until it is detected again. If the counted value is within a predetermined value, the occurrence of a fault is predicted and a fault alarm is output to the central processing unit. And outputting a fault alarm of the peripheral control device. 2. Analyzing and editing the content of an error newly generated during the connection control process in accordance with a command from the central processing unit, and comparing and comparing the content of the error with the temporarily stored error content;
If the same error is detected, the number of receptions of the command of the central processing unit is counted until the same error as the temporarily stored error content is detected again, and the counted value becomes equal to or more than a predetermined value. If it is determined to be normal, count the number of times this normality is detected, if the predetermined number of normality is detected, erase the temporarily stored error content, and temporarily store again when a new error is detected, 2. The method according to claim 1, wherein the number of times the central processing unit receives the command is counted. 3. A fault alarm output circuit of a peripheral control device connected to the central processing unit for controlling the peripheral device, receives the command from the central processing unit, and terminates the connection control process at the end of the peripheral device connection control process. An error analysis unit that analyzes and edits the details of an error that has occurred in the peripheral control device and the peripheral device; an error storage unit that temporarily stores the error content analyzed by the error analysis unit; An error comparing unit that analyzes and edits the content of an error newly generated during the subsequent connection control process and compares and compares the error content output and the error content temporarily stored in the error storage unit; and A counter unit having a function of receiving a coincidence signal output when the same error is detected and counting the number of times the central processing unit has received a command has a total count at this time. After reading the numerical value, return the count value of the counter unit to zero, and when the read count value is within a predetermined value, predict a fault occurrence and output a fault alarm to the central processing unit, If the read count value is equal to or greater than a predetermined value, it is determined that the device is normal, and the number of times the normality is detected is counted internally, and if the predetermined number of normalities is detected, an erase signal is output to the error storage unit. And a failure alarm output unit for erasing the temporarily stored error contents.