JPS58149529A - Turning-back and diagnosing system of channel status word - Google Patents

Abstract

PURPOSE:To improve the diagnostic function and the efficiency of the locating work or the like, by demarcating automatically faults in paths and parts when faults concerning channel status words are searched. CONSTITUTION:A channel status word CSW turning-back control data signal transmitted from a central controller 1 to a common bus 4 is taken into a peripheral controller 3 and is recognized and is stored in a storage area B for CSW original data of a buffer memory 3e. Simultaneously, this signal is transferred and written onto a specific area A for storage of CSW of a main storage device 2 and is stored in a storage area C for CSW read data of the buffer memory 3e, and write data in the area B and read data in the area C are compared and discriminated autonomously, and the result is reported to the central controller 1 through a status controlling part 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for returning a channel status word to isolate nine parts of a faulty route when searching for a fault related to the channel status word (hereinafter referred to as C8W) in a communication control device or the like. This relates to diagnostic methods.

The conventional C8W loopback diagnosis method in a communication control device, etc., for example, sends a C8W loopback control data signal containing test data at the end of the C8W loopback diagnosis from the central controller to a common bus, and sends this signal to the common bus. The status control unit of the peripheral control device receives the test data, temporarily stores it in the C8W data storage area in the buffer memory, and then transfers it to the C8W data storage specific area in the main memory.
The test data is stored, the central control unit reads the test data from the main memory, and performs a comparison and judgment.

In this case, the peripheral control device does not leave the above test data in the buffer memory and does not check the result of writing to the main memory, so when a failure occurs in the C8W@ notification, the central control The device may be damaged due to a failure in the path where the peripheral control device receives the C8W return control data signal from the central control device, or a failure in the path from the peripheral control device to the main storage device to write the test data contained in the same signal. It was not possible to identify the problem.

Therefore, in order to separate the two parts of the faulty route, a method that requires a lot of manpower, is complicated, inefficient, and uncertain has to be used.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art,
An object of the present invention is to provide a channel status word return diagnosis method that can automate the separation of two parts of a fault route when searching for a fault in C3WK.

A feature of the present invention is that a central control device sends out a channel status word return control data signal containing predetermined test data for channel status word return diagnosis, and a peripheral control device receives this signal to perform the relevant test. In the channel status word loopback diagnosis method in which data is transferred and written to a specific channel status word storage area of the main memory, and the contents are collated and judged by the central processing unit, the peripheral control device performs channel status word loopback diagnosis. It autonomously compares and judges the original test data and the read test data written to the main memory and further read, and sends the results to the central control unit.
The central processing unit will check the presence/absence and content of the report,
Alternatively, there is a channel status word return diagnosis method in which a fault path/part is identified based on the presence/absence and content of the test data written to the main storage device, or a combination thereof.

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

The figure is a system diagram of an embodiment of a communication system m+ device using a channel status word return diagnosis system according to the present invention.

Here, 1 is a central control unit (CPU), 2 is a main memory (MM), which has a C8W data storage specific area A in addition to the normal storage IJA, and 3:
Peripheral control unit (IOC), 3a is its status control unit (8CJ), 3b is the same bus, 3C is the same arithmetic processing unit (ALU), 3d is the same read-only memo 'J (
ROM) in which the arithmetic processing unit 3C and other control programs are stored; 3e is a buffer memory (BFM); , which has a C8W original data storage area B and a C8W read data storage area C in addition to the normal '@ network area, 4 is for each of the above devices 1 and 2.
．． A common bus (B' (JS)) connects the three.

In addition, since this communication control device communicates with other same devices through the line, the modem is connected to the input/output port (channel).
Although it is connected to the peripheral control device 3 as a controller, it is not shown because it has no direct relation to the explanation of this embodiment.

The operation of status word diagnosis will be explained below.

First, the central control device 1 contains predetermined test data for C8W return diagnosis (which has the same format as normal C8W data and has a special pattern indicating that it is for testing). Sends the C8W return control data signal to the common bus 4 and writes all "0'" to the C8W data storage specific area of the main memory device 2. This is because the test data will be stored from the peripheral control device 3 later. It is.

Next, the peripheral control device 3 takes in the C8W return control data signal from the common bus 4 to the arithmetic processing section 3c using the status control section 3a.

After recognizing this signal, the arithmetic processing unit 3c stores the test data in the C8W original data storage area B of the buffer memory IJ3e (route 5a),
The test data is transferred and written to the C8W storage specific area A of the main memory device 2 (route 5b), and the test data is read from the area A of the main memory device 2 to the buffer memo IJ3.
After storing the C8W read data storage area +) aC of e (path 5d), it autonomously compares and determines the written data (area B above) and the read data (area C above),
The results are reported to the central control device 1 via the status control section 3a.

The central control unit 1 performs C8W return diagnosis as follows.

(1) If there are too many responses (-4 notifications) from the peripheral control device 3 to the above C8W return control data signal, and the test data is written in the C8W data special storage area A of the main storage device 2 to an appropriate size. If not, it is determined that there is an abnormality in the path 5a between the central control device 12 and the peripheral control device 3, and that it is a foreign book.

(2) Even though the test data has not been written to the C8W data storage specific area A of the main memory device 2, the above C
If there is no response (report) from the peripheral control device 3 to the 8W return control data No. 1g, it is determined that there is an abnormality or failure in the response function of the peripheral control device 3.

(3) When the response (¥8 notification) from the peripheral control device 3 to the C8W return control data signal is abnormal, and when the C8W data storage specific area A of the main storage device 2
If the test data is not written correctly,
It is determined that there is an abnormality or failure in the path 5b between the peripheral control device 3 and the main storage device 2.

(4) C8W data storage specific area A of main storage device m2
Even though the test data is written on the C8
If the response (-4, notification) from the peripheral control device 3 to the W loopback control data signal indicates an abnormality, it is assumed that the path 5C between the central control device 1 and the main storage device 2 is abnormal or faulty. judge.

As described above, the central control device 1. Abnormalities and failures in the paths 5a and 5J5C between the main storage device 2 and the peripheral control device 3, and abnormalities in the peripheral control device 3 itself.

Faults can be automatically identified, and fault analysis work by C8W return diagnosis can be facilitated.

As described above in detail 1, according to the present invention, in a communication control device, etc., the central control device automatically performs diagnosis and identification of writing and reading of C8W from the peripheral control device to the main memory device. As a result, it is possible to improve the diagnostic function and isolate the faulty part of the C8W reporting route, which has a remarkable effect on improving the efficiency of work.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of a communication system @j device using a channel status word return diagnosis system according to the present invention. DESCRIPTION OF SYMBOLS 1...Central control unit, 2...Main storage device, 3...Peripheral control device, 2a...Status control unit, 2b...
Bus, 3C... Arithmetic processing unit, 3d... Read-only memory, 3e... Buffer memory, 4... Common bus. Agent: Patent attorney Kosaku Fukuda (/Yoka 1 person)

Claims (1)

[Claims] 1. The central control unit sends a channel status word return control data signal containing predetermined test data for channel status word return diagnosis, and the peripheral control unit receives this and stores the test data in the main memory. In the channel status word return diagnosis method, in which the channel status word is transferred and stored in a specific storage area, and its contents are collated and judged by the central control unit, the peripheral control unit collects the original test data for the channel status word return diagnosis. The results are autonomously compared and judged with the reading test data stored in the main memory and further read, and the results are reported to the central control unit, and the central processing unit determines whether or not there is a report and its content A channel status word return diagnosis method characterized in that a failure route/part is identified based on the presence/absence/content of writing of the test data to the main storage device, or a combination thereof.