JPH03100836A - Fault diagnostic processing system - Google Patents

Abstract

PURPOSE:To diagnose a fault even if this fault influences an external storage, etc., by storing a fault diagnostic program into a storage after turning it into a ROM and connecting this ROM to a bus together with a central controller, a terminal control interface device, etc. CONSTITUTION:A central controller 2 is provided to control the programs which are connected to each other via a bus 1 together with a storage 3 containing a ROM circuit 31 which stored fixedly a fault diagnostic program, a terminal control interface device 4, a main storage 6, and a relative device 7. The circuit 31 stores a monitor program 32 and a test program 33 as the fault diagnostic programs. When a process program has a fauler, the controller 2 shifts the control to the program 32 of the main storage 3 from the main storage 6. Then the program 33 is started under the control of the program 32, and the fault is diagnosed for each device with an instruction of a maintenance enginner received from a terminal 5. As a result, the fault is diagnosed regardless of the influence of the fault to a system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fault diagnosis processing system in which a central control unit, a main storage device, etc. are interconnected via a bus, and a fault diagnosis process is performed using a fault diagnosis program.

[Conventional technology]

Conventionally, this type of fault diagnosis processing system is composed of a central control unit, a main storage device, an external storage device such as a magnetic disk device or a magnetic tape device, and a terminal control interface device, which are connected to each other via a bus.

If a fault occurs in this processing system, the central controller transfers the program loader from the external storage device to the main storage device, and the program loader transfers the fault diagnosis program (monitor program and test program) from the external storage device as well. The data is transferred to the main storage, and the fault diagnosis is performed by operating the terminal via the terminal control interface device under the control of this fault diagnosis program.

Note that the central control device internally stores only the procedure for transferring the program loader as a ROMized program.

[Problem to be solved by the invention]

In the conventional fault diagnosis processing system described above, it is necessary to read the program loader and the fault diagnosis program from the external storage device and transfer them to the main storage device, so if there is a fault in these devices, it is difficult to diagnose the fault. could not.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault diagnosis processing system capable of diagnosing a fault regardless of how the fault has spread to the system.

[Means to solve the problem]

The fault diagnosis processing system of the present invention includes a central control unit that performs program control, a main storage device that stores programs and data, a terminal control interface device that controls the terminals accommodated therein, and a fault diagnosis program that is fixedly installed. The system includes a storage device having a ROM circuit for storing data, and a bus interconnecting each of the devices, and is configured such that when a fault occurs, the central control unit diagnoses the fault using the fault diagnosis program stored in the ROM circuit. .

Further, the storage device may include a RAM circuit having a work area necessary for executing the fault diagnosis program.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The fault diagnosis processing system of this embodiment consists of a central control unit 2 which performs control by a program and which is interconnected by a bus l.
, a storage device 3 having a ROM circuit 31 that permanently stores a fault diagnosis program, a terminal control interface device 4 that accommodates a terminal 5, and a main memory bag W6 that stores programs and data necessary for normal control processing. and a related device 7 having other functions such as an external storage device. Further, the ROM circuit 31 stores a monitor program 32 and a test program 33 as fault diagnosis programs.

In this configuration, if a failure occurs in the processing system,
The central control device 2 transfers control from the program in the main storage device 6 to the monitor program 32 in the storage device 3, starts the test program 33 under the control of the monitor program 32, and performs each test program according to instructions from the maintenance person from the terminal 5. The specific method for diagnosing equipment failures is system configuration (replacement system).

Although it differs depending on the information processing system (information processing system, etc.), diagnosis can be performed using an appropriate well-known method.

In the above embodiment, the storage device 3 includes a RAM having a work area necessary for executing the fault diagnosis program.
By providing the circuit 34, the work area during execution of the monitor program 32 and test program 33 can be set in the storage device 3 instead of in the main memory bag W6, so more precise diagnosis of the main storage device 6 can be performed. .

〔Effect of the invention〕

As explained above, according to the present invention, a fault diagnosis program is stored in a ROM in a storage device, and is connected to a bus together with a central control unit, a terminal control interface device, etc., so that when a fault occurs, this storage device can be easily accessed. Control of the central controller can be transferred to a fault diagnosis program within the system. As a result, the fault can be diagnosed even if the fault has spread to the external storage device or the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Bus, 2...Central control unit, 3...Storage device, 4...Terminal control interface device, 5...Terminal, 6...Main storage device, 31...ROM circuit , 32
...Monitor program, 33...Test program,
34...RAM circuit.

Claims (1)

[Scope of Claims] 1. A central control unit that performs program control, a main memory that stores programs and data, a terminal control interface device that controls the accommodated terminals, and a fault diagnosis program that is fixedly stored. It is characterized by comprising a storage device having a ROM circuit and a bus interconnecting each of the devices, and when a fault occurs, the central control device diagnoses the fault using the fault diagnosis program stored in the ROM circuit. Fault diagnosis processing system. 2. The fault diagnosis processing system according to claim 1, wherein the storage device includes a RAM circuit having a work area necessary for executing the fault diagnosis program.