JPH0417583B2 - - Google Patents

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Application Fields Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Embodiment (1) Structure of an Embodiment (Part 1) (Fig. 2, Fig. 3) (2) Operation of one embodiment (Fig. 4) Effects of the invention [Summary] In a redundant system, a diagnostic program is set in advance in the control memory area in the central control unit, and the current The standby electronic exchange is diagnosed by sending the address of the diagnostic program (in the control memory) to be executed from the central control unit to the standby central control unit.

[Industrial application field]

The present invention relates to a redundant system diagnosis method for a central control unit in an electronic exchange, etc., and in particular, to perform diagnosis at high speed by starting a diagnostic microprogram provided in a control memory area on a standby side from the active side. It was made so that it could be done.

In order to maintain system safety at electronic exchanges,
As shown in FIG. 5, a duplex system is adopted.
That is, main memory MM and central control unit
Two electronic exchanges equipped with a CC and a channel control device CHC are prepared and connected as shown in FIG. For example, 0 series (MM, CC, CHC attachments are 0)
The electronic switching system is currently in use (ACT), and the 1st system (MM,
When the electronic exchange with CC and CHC attached in 1) is used as a backup (SBY), if an abnormality occurs in the current electronic exchange, switch the 1 system to the active one and use the 0 system as a backup to restart the system. It is to be operated. In FIG. 5, I0 is an input/output device, such as a subscriber telephone or a terminal device.

In electronic exchanges, in order to further improve the reliability of the system, a diagnostic program is run to the standby system once a day to check whether its operation is normal or not. It is requested that you check.

[Conventional technology]

In order to do this, in the conventional diagnostic method, a diagnostic program (clock supply stop command, micro 1-step operation command, clock supply stop release command, etc.) is stored in the main memory 11, as shown in FIG. This is sent to the shift register 12 one step at a time, and transferred to the transfer control device 14.
The shift register 13 of the spare CC under the control of
and run the diagnostic program.

The execution of this diagnostic program will be explained with reference to the flowchart shown in FIG.

In order to diagnose the operating status of the standby electronic exchange from the central control unit of the current electronic exchange, a clock supply stop command is first sent to address _m0 , a specific area of the main memory 11 (as shown in Figure 6, the microinstruction setting area). The data is transferred to the specified area), stored in the shift register 12, and shifted by a transfer activation signal from the transfer control device 14, and all bits are transferred to the spare shift register 13. After this transfer is completed, transfer control device 1 is sent to the backup central control device.
4 sends an operation start signal to the sequencer 16, whereby the standby central control unit executes the instruction transferred to the shift register 13 and set in the instruction register 15.

By the way, when this diagnostic program is executed, first, a clock supply stop instruction is transferred to the microinstruction setting area, stored in the shift register 12, shifted to the standby shift register 13, and transferred to the instruction register 15. After setting, it instructs the microprogram of the standby central control unit to start operation.

The standby system central control unit starts the sequencer 16 according to the command part of the shift register 13 and executes the microprogram corresponding to the control command, so the clock supply stop instruction is executed first, and the standby system The central control unit is temporarily in a stopped state. This is because you don't know what will happen when you run the diagnostic program.
This is to follow it. Therefore, while the diagnostic program of the standby system is being executed, the clock of the standby system is controlled by the active system.

The specific area (m ₀ address, m ₀ , m ₀ +1 address as necessary) of the current main memory 11 includes:
First, test data for specific diagnosis is edited and its micro 1 step operation command is set.This is shifted to the shift register 13 via the shift register 12, and the command to be executed is transferred to the CM command register 15. is set to At this time, clock control, micro 1-step execution, etc. are specified in the command section. In the case of this micro 1 step execution command, the command is stored in the CM command register 15 and executed. The execution results are stored and held in the respective areas, and wait for the results to be read from the active central control unit.

In this way, the time it takes for a series of micro 1-step operation instructions required for diagnosis to be transferred to the standby central control unit, for the standby central control unit to execute these micro instructions and store the results. (timing processing), the current central controller reads these results and sends the clock supply stop release command to the shift registers 12 and 1.
3, thereby canceling the initially stopped clock supply. In this way, the standby system completes the diagnostic test and returns to the normal standby state. The diagnostic results are recorded by appropriate means and used to understand the operating state.

[Problem that the invention seeks to solve]

In the conventional diagnostic method, the current central control unit reads out the diagnostic program loaded in the main memory one instruction at a time, sends it to the standby system via the shift register, and dynamically stops the program. The process of sending the next step had to be repeated.
In other words, in order to maintain the state after executing one instruction, it is necessary to stop the clock, read the result, and execute the next step.
A control means was required to stop the clock.

As described above, there is a problem in that indirect processing such as clock control on the active side, settings after the microdiagnosis command, and transmission of diagnostic data step by step is required.

The purpose of the present invention is to solve these problems by diagnosing the standby central control unit without sending multiple diagnostic microprograms step by step from the active central control unit to the standby central control unit. The present invention provides a method for diagnosing a redundant system of an electronic exchange that is controlled.

[Means for solving problems]

In order to achieve the above object, in the present invention, as shown in FIG. 1, a diagnostic microprogram is stored in the control memory CM in advance. When performing diagnosis, the present central control unit instructs the standby central control unit to read and start the diagnostic program in the control memory CM.

[Effect]

When diagnosing a standby electronic exchange, the active central control unit instructs the standby central control unit to read the control memory in which the diagnostic program is stored, so that the standby central control unit can perform its control. Read the diagnostic program from memory,
Run this.

[Embodiment] (1) Configuration of one embodiment Hereinafter, one embodiment of the present invention will be described in detail.

FIG. 2 is a configuration diagram of an embodiment of the central control device according to the present invention. In the figure, the left side is the active system (ACT) and the right side is the standby system (SBY).
Both the active system and the backup system have the same configuration, but for convenience of explanation, the backup system side is shown in a simplified manner.

In the main memory 1 (MM ₀ ) of the active system, a diagnostic (DIMG) instruction for starting the micro-diagnostic program stored in the control memory 5' (CMI) of the backup system is set in the diagnostic program. There is. When a timer owned by the system confirms the execution time of the backup system, the DIAC instruction in the main memory 1 is read into the next instruction storage register 9 (PRIR).

When the DIAG instruction is read, main memory 1
A microinstruction is sent to the _sequencer 4 ₍ SEQ). Sequencer 4
The above-mentioned microinstruction is controlled by the memory 5.
(CM0) and stores it in the microinstruction storage register 6 (CMIR0). In the data portion of the DIAG instruction stored in the next instruction storage register 9, addresses m ₀ and m ₀ +1 of the main memory 1 are set, and these are stored in the memory address register 8 (MAR).
According to the address stored in the memory address register 8, the contents of addresses m ₀ and m ₀ +1 of the main memory 1 are read out and stored in the memory buffer register 9 (MBR). Address m ₀ stores a standby microprogram activation instruction, and address m ₀ +1 stores a start address of a microdiagnosis program stored in the standby control memory 5' (CMI). According to the microinstruction set in the microinstruction storage register 6, the contents of the memory buffer register 9 are transferred to the shift register 3 via the multiplexer 2 (MPX0).
(SFR0). Multiplexer 2 is
According to the contents of the microinstruction storage register 6,
A switch is made. In other words, when transferring the contents of the memory buffer register 9 to the shift register 3, and when transferring the contents of the memory buffer register 9 to the shift register 3',
The transfer path is switched depending on when the contents stored in (SCR1) are transferred to the shift register 3.

The microprogram startup instruction stored at address _m0 of main memory 1 is set in the command section of shift register 3 (SFR0), and
A microprogram start address is set in the data section. These data are transferred to the standby shift register 3' (SFR1) under the control of the transfer control device 7. The transfer control device 7 is a backup multiplexer 2' (MPX1).
and sets the contents of shift register 3 to shift register 3'.

The standby sequencer 4' (SEQ) is activated by the microprogram activation instruction (command part) transferred to the shift register 3', and the microprogram activation address (data part) is set as the jump address of the sequencer 4' to the control memory 5. The microdiagnostic program stored in ' starts running. Similarly, a microprogram activation instruction for the control memory 5 is stored in the main memory 1' (not shown in FIG. 2).

The multiplexer 2 selects whether the input to the shift register 3 is data from the main memory 1 or data from the shift register 3'. Similarly, multiplexer 2' selects whether input to shift register 3' is data from main memory 1' or data from shift register 3.

The control memory 5 stores a diagnostic program for the own electronic exchange (Self), and this diagnostic program is started in response to a microprogram activation command transmitted via the shift register 3' of the other electronic exchange (Mate). . Similarly, a diagnostic program is stored in the control memory 5', and this diagnostic program is executed when the microprogram activation instruction stored in the main memory 1 is read out and transmitted via the shift registers 3 and 3'. will be operated. Note that the control memories 5, 5' can be constructed from ROM.
In FIG. 3, micromemory 1, micromemory 2, . . . shown in control memory 5 represent diagnostic microprograms, respectively.

(2) Operation of one embodiment The operation of FIG. 2, which is an embodiment of the present invention, will be explained with reference to the flowchart of FIG. 4. In the active system, the multiplexer 2 is controlled to output the input data from the main memory 1, and in the standby system, the multiplexer 2' is controlled to output the input data from the shift register 2.

When diagnosing the standby system from the current use, a microprogram activation instruction is read from the main memory 1, stored in the shift register 3, and shifted to the shift register 3' of the standby system.
When storing data from the main memory 1 to the shift register 3, it is transferred once to the address setting area as in the conventional case, and if necessary, a microprogram startup instruction placed in multiple addresses (address table) is transferred. To edit.

This microprogram start command includes an address to be read from the control memory 5' and an instruction to start the microprogram read from this address. Based on these addresses and commands, the sequencer 4' reads a diagnostic program from the control memory 5' and executes the diagnosis. At this time, the diagnostic program is read out using the designated address as the jump address of the sequencer 4'.

In current central control units, a so-called timing process is performed to wait for the time elapsed until the diagnosis program is executed and a state is reached in which data necessary for diagnosis can be obtained.

By the way, in the standby system, after executing this diagnostic program, the execution result of the diagnostic program is held by repeating no-operation until the diagnostic result is read out from the active central control unit.

In the current central control unit, after a period of time has elapsed for obtaining the execution results of this diagnostic program, the results are read out to obtain diagnostic data. This diagnostic data may be temporarily stored in a file, or may be output by printing out or the like.

By storing the micro-diagnosis program in the control memory of the central control unit, the active system can simply issue an instruction to start the micro-diagnosis program, and the standby system can execute the micro-diagnosis program from the control memory under its own control. can be read out sequentially to perform diagnosis.

Conventionally, one micro-diagnosis program
Since each step was transferred from the active system to the standby system, it was necessary to monitor the operation of each step in the standby system.Therefore, it was also necessary to control the clock of the standby system in the active system. ,
Since the standby system is operated by a micro-diagnosis program stored in its own control memory, the active system only needs to know the results.

〔Effect of the invention〕

In the present invention, as many microprograms as necessary for diagnosis are set in the control memory, and an instruction specifying the address where the diagnostic microprogram to be executed on the active side is stored is sent to the standby system. Diagnosis can be performed by starting the program. Moreover, once the diagnostic microprogram in the control memory is started, it can perform a series of processes, making it possible to execute diagnostics without having to send multiple commands from the active side as in the past. control,
There is no need to repeatedly set microinstructions and send data, and as a result, the diagnostic execution time can be significantly reduced. Moreover, even if the control memory contains multiple diagnostic microprograms, they can be easily read out by specifying addresses, so that they can be read out easily by specifying addresses, so that they can be used not only for the own central control unit but also for external devices such as network equipment. can also be easily diagnosed. Further, since the clock control command and the setting of a large number of test data, etc., which were set in the main memory on the active side, are no longer necessary, the main memory can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 is a configuration diagram of an embodiment of the present invention, Fig. 3 is a data flow diagram in the present invention, Fig. 4 is a diagram explaining the operation of the present invention, and Fig. 5 is an electronic A schematic diagram of a duplex exchange system, FIG. 6 is a conventional example, and FIG. 7 is an explanatory diagram of the operation of the conventional example. 1, 1'... Main memory, 2, 2'... Multiplexer, 3, 3'... Shift register, 4,
4'...Sequencer, 5,5'...Control memory,
6, 6'... Control memory instruction register.

Claims (1)

[Scope of Claims] 1. A diagnostic method for a redundant system each comprising a main memory and a central control unit, comprising: a control memory storing a plurality of diagnostic microprograms; and an instruction specifying an address of the control memory. a main memory that is configured to operate a computer; a data sending unit that sends instructions outputted from the main memory to a standby central processing unit; and a starting unit that starts a diagnostic microprogram in the control memory from data received by the data sending unit. When performing diagnosis, the instruction that specifies the address of the control memory of the backup system is read from the current main memory, and the specified address is transmitted to the backup system, so that the backup system is selected based on the address. A redundant system diagnostic method characterized in that one diagnostic microprogram is activated to execute diagnostic processing.