JPH07307747A - Method and device for checking device operating state - Google Patents

Abstract

PURPOSE:To eliminate the waste of time required for abnormality detection by immediately judging control instruction issuance to an unmounted part even when a central controller erroneously imparts an unmounted input/output controller number and issues a control information instruction. CONSTITUTION:Individual device numbers are imparted to respective I/O devices, a destination I/O device number 31 is imparted to the tip of a control information format 28 and the control information instruction 32 is transmitted from the control information transmission part of the central controller to the respective I/O devices. In the respective I/O devices, the imparted number and their own device numbers are collated, the control information instruction 32 is fetched in the case of coincidence, control is executed corresponding to the information instruction and an execution response 33 to which the present I/O device number 31 is imparted is returned to the central controller as the result of execution. A mounting information return part receives the destination I/O device number when the control information instruction is issued from the central controller, collates it with the mounting information of the I/O device and returns the information 34 of mounting and unmounting to the central controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device operating state check method and device for an input / output control device (hereinafter referred to as I / O device) in an information processing and switching system, etc.
In particular, the present invention relates to a method and apparatus for checking a device operation state in a system connected by a common control bus.

[0002]

2. Description of the Related Art Conventionally, in this type of device number collation method, when a central control unit and a plurality of I / O units are connected in multiple stages by a common control bus, the bus termination is at the farthest end from the central control unit. It has been subjected.

The central controller controls the I / O of each I / O device individually.
With respect to the control information issued with the O device number, the assigned I / O device number and the self I / O device number are checked only by each I / O device, and if they match, the control information is taken in, and The instructed control is executed, and as a result of the execution, the response with the self I / O device number is returned to the central control device.

The central controller responds to the issued control information by
When a response is returned, it is regarded as a normal end, and when it is not returned, it is considered as a failure of the issued I / O device. (Japanese Patent Laid-Open No. 60-1448
No. 51: Channel controller)

[0005]

In the conventional method, each I
The I / O device number is checked only by the I / O device, and when there is a failure, the central control device mistakenly checks the unmounted I / O device number because the response is not monitored by the central control device. When the control information is given and issued, the response is not returned because there is no corresponding device number and the I / O device that checks the device number. Therefore, the response non-return monitoring detects an error and takes a long time to detect the error. There is a problem.

Furthermore, due to a common control bus failure between the central controller and each I / O device, the correct I / O at the central controller is obtained.
If an event occurs in which the control information does not reach the corresponding I / O device even though the O device number is assigned and the control information is issued, the corresponding I / O device is detected despite the abnormality of the common control bus.
There is a problem in erroneously detecting the failure of the corresponding I / O device in the response non-return monitoring for the / O device.

An object of the present invention is to immediately issue a control information instruction to an unmounted device even if the central control device mistakenly gives an unmounted I / O device number and issues control information. In the case of a failure, it is possible to provide a method and a device that can immediately judge a common control bus failure as an I / O device failure even if the control information with the correct I / O device number is issued. It is to eliminate useless time required for detection.

[0008]

In order to solve the above-mentioned problems, according to the present invention, the I / O of control information issued by the central controller is
Mounting information return means provided at the farthest end of the common bus for receiving the O device number and returning the mounted or unmounted information of the I / O device; and an execution response from each I / O device, It is provided with a response collation judging means for taking in and collating the mounting response from the mounting information returning means.

[0009]

Each I / O device is given an individual device number, and the destination I / O device number is given to the leading end of the control information format so that each I / O can be sent from the control information transmitting section of the central control device.
The control information instruction is transmitted to the device, each I / O device collates the assigned number with its own device number, and if they match, the control information instruction is taken in and the control is executed according to the information instruction. As a result of the execution, the execution response to which the self I / O device number is added is returned to the central controller.

On the other hand, the mounting information returning section receives the destination I / O device number when the control information instruction is issued from the above-mentioned central control device, compares it with the mounting information of the I / O device, and mounts it. , Returns unimplemented information to the central controller. As described above, the central controller response collating unit collates the execution response from the I / O device with the mounting response from the mounting information unit to determine whether the operation result of the I / O device according to the control information instruction is normal end or abnormal. In the above cases, it is determined whether the unimplemented issuance is mistakenly issued or there is a failure, and in the case of a failure, the part is immediately determined.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The processing and configuration according to the embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a flowchart showing the processing procedure of the device number checking method. Control information instruction issuing process 12
Then, the I / O device number is added to the control information instruction and transmitted, and in the number collation processing 13, the I / O device number given to the control information instruction and the self I / O device number are collated and matched. In that case, the control information instruction is taken in, and the control execution processing 14 controls according to the instruction. In the execution response return processing 15, the response information and the I / O device number are added to the execution response format and the result is returned to the central control unit. On the other hand, in the mounting information return unit, the I / O device number assigned at the time of the control information instruction issuing process 12 is received, the information on whether the I / O device is mounted or not is collated in the mounting collating process 16, and the mounting or Returns unimplemented information to the central controller. In the response collation processing 19, the execution response from these I / O devices and the mounted / unmounted response from the mounting information return unit are collated to determine the operation result of the I / O device.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. The central control device 21 and the N I / O devices 22-1 to 22-N are connected by the common control bus 27, and by the control information instruction 28 transmitted from the control information transmitting unit 25 in the central control device 21, I / O devices 22-1 to 22-
N is controlled.

FIG. 3 shows a control information transfer format on the common control bus 27 in the embodiment of the present invention. The control information instruction 28, the execution response 29, and the mounting response 30 are as follows.
The I / O device number 31 is added to the head and transmitted.

FIG. 4 shows a collation result in the response collating section 26 in the central control unit 21 in one embodiment of the present invention.

An example of the operation will be described with reference to FIGS.
When the central controller 21 controls the I / O device 22-1, the control information instruction 28 is transmitted from the control information transmitter 25 with the I / O device number 31 as the I / O device number 22-1.

The I / O device 22-1 has the I / O device number 22-1 and the self device number 22 of the received control information instruction 28.
-1 is collated, control information is taken in by the coincidence, and the instruction is executed.

When the execution is completed in the I / O device 22-1, the I / O device number 31 of the execution response 29 is returned to the central controller 21 as 22-1.

The mounting information return section 23 receives the I / O device number 22-1 and the mounting information 24-1 of the received control information instruction 28.
Since it is mounting, the mounting information 34 is mounted in the mounting response 30, and the I / O device number 31 is set to 22-1.
It is returned to the central controller 21 as.

In the response collating section 26 of the central controller 21,
Execution response 29 “Yes” and implementation response 30 “Implementation”
Therefore, as shown in FIG. 4, it is determined that “normal execution has ended”.

Here, the central control unit 21 mistakenly executes I / O.
When the control information instruction 28 is issued as the device number 22-N + 1, the execution response 29 is not returned because the corresponding I / O device 22-N + 1 is not mounted, but the mounting information 34 is not mounted by the mounting information return unit 23, and / O device number 22-N +
The mounting response 30 is returned as 1, and the response collating unit 26 of the central control unit 21 determines that the control information instruction is issued to the unmounted state, as shown in FIG.

Further, when an event that the I / O device 22-1 has not reached yet occurs due to a common control bus failure, the I / O device 22-1
Since the execution response 29 from -1 and the mounting response 30 from the mounting information returning unit 23 have not been returned, it is determined that a common control bus failure has occurred, as shown in FIG.

[0023]

As described above, according to the present invention, the mounting information returning section for returning the mounted or unmounted response to the I / O device number of the control information issued by the central control unit is the most common control bus. Since the central control unit is provided with the bus termination at the far end and the central control unit is provided with the response collating unit for collating the execution response from each I / O device with the mounting response from the mounting information returning unit, the central control unit is not mistakenly Even if the mounted I / O device number is given and the control information is issued, a mounting response (not mounted) is returned from the mounting information return unit, and there is an effect that an abnormality can be immediately detected.

Further, due to a common control bus failure between the central control unit and each I / O unit, the correct I / O is set in the central control unit.
Even if the control information is issued with the O device number and the control information does not reach the corresponding I / O device, the control information does not reach the corresponding I / O device. However, by not returning the mounting response, there is an effect that it is not erroneously detected as a failure of the corresponding I / O device.

Further, even when the execution response is “present” and the mounting response is “not mounted”, an abnormality can be immediately detected as a “mounting information return section failure”, and an abnormal state of the system can be properly judged. At the same time, it is possible to eliminate the wasteful time required for the conventional abnormality detection.

[Brief description of drawings]

FIG. 1 is a flowchart of a processing procedure according to an embodiment of the present invention.

FIG. 2 is a configuration block diagram of an embodiment of the present invention.

FIG. 3 is a diagram showing a control information transfer format on a common control bus according to an embodiment of the present invention.

FIG. 4 is a diagram showing a response matching result according to an embodiment of the present invention.

[Explanation of symbols]

 11 Start 12 Control Information Instruction Issuing Process 13 I / O Device Number Matching Process 14 Control Execution Process 15 Execution Response Process 16 I / O Device Number / Mounting Matching Process 17 Mounting Response Return 18 Unmounting Response Return 19 Response Matching Process 20 End 21 Central control device 22 I / O device 23 Mounting information returning unit 24 Mounting information 25 Control information transmitting unit 26 Response collating unit 27 Common control bus 28 Control information instruction transfer format 29 Execution response transfer format 30 Mounting response transfer format 31 I / O device Number 32 Control information 33 Response information 34 Mounting information

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04L 12/28

Claims (3)

[Claims] 1. An input / output control device is provided with an individual device number, and a destination input / output control device number is added to the leading end of the control information instruction format so that the central control device gives a control information instruction to each input / output control device. Each input / output control device collates the assigned number with its own device number, and if they match, the control information instruction is taken in, control is executed according to the information instruction, and self-input / output is performed as a result of execution. In the apparatus operation state check method of returning an execution response to which a control device number is given to the central control device, when the input / output control device receives the control information instruction transmitted from the central control device, The destination device assigned to the control information instruction by the central control unit according to the procedure for transmitting the mounting information response indicating the mounted / unmounted state and the state indicated by the mounting information response. Device operation status check method, which comprises carrying out degree in the procedure output control unit detects whether the unimplemented or is implemented by checking the mounting and unmounted in the input-output control unit. 2. The input / output control device mounting / non-mounting detection procedure detects the presence / absence of an execution response of the input / output control device at the same time, and judges the operating state of the device by the procedure of collating the two responses. The apparatus operation state check method according to claim 1, wherein 3. A central control unit and a plurality of input / output control units are connected by a common control bus, and the central control unit issues control information to which unit numbers of individual input / output control units are assigned,
In the device operation status check device, the input / output control device fetches only the control information that matches the own device number, executes the instructed control, gives the result of execution to the central controller and gives the own device number, Mounting information returning means provided at the farthest end of the common bus for receiving the input / output control device number of the control information issued by the central control device and returning the mounted / unmounted information of the input / output control device. And a response collation judging means for incorporating and collating the execution response from each input / output control device and the mounting response from the mounting information returning means in the central control device.