JPH0595408A - Diagnostic system - Google Patents

Abstract

PURPOSE:To discriminate a troubled device to be diagnosed without spending labor and time, in the case a stack trouble is generated in a common bus, in an electronic exchange for connecting plural devices to be diagnosed to a duplexed central processing system device by the common bus. CONSTITUTION:A central processing system device 100 is provided with a diagnosed device power source control means 101 for instructing turn-on/turn-off of a power source to each device to be diagnosed 200, and a diagnose executing means 102 for executing a diagnosis of each device to be diagnosed, connected to a common bus 6 in a state that turn-on or turn-off of the power source of each device to be diagnosed is instructed. Each device to be diagnosed is provided with a power source opening/closing means 201 for executing turn-on/ turn-off of the power source to the own device by designation of the diagnosed device power source control means, and a bus passing means 202 for detaching the own device from the common bus, in the case the power source to the own device is turned off, and maintaining the connection of a central processing system device and other device to be diagnosed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic system in an electronic exchange in which a plurality of devices to be diagnosed are connected to a duplicated central processing unit device by a common bus.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing an example of an electronic exchange subject to the present invention, FIG. 7 is a diagram showing an example of a communication multiplexer shelf, and FIG. 8 is an example of a communication multiplexer rack. FIG.

In FIG. 6, a central controller 1 and a main memory 2 for executing call processing of an electronic exchange, a channel controller 3 for connecting various input / output devices to the central controller 1,
In addition, the system monitoring devices 4 for monitoring the operating states of the electronic exchanges are duplicated, and one of them is operating as an active system and the other is standing by as a standby system.

Each channel control device 3 includes a plurality of communication multiplexers 5 [individual communication multiplexers 5 _i (where i is 0
Through n)] are connected in series by the common bus 6.

Each communication multiplexer 5 _i temporarily communicates with the common bus 6 connected from the channel controller 3 (in the case of the communication multiplexer 5 ₀ ) or the preceding communication multiplexer 5 _i-1. apparatus 5 after retracted into the _i, but connects extended to communication multiplexer 5 _{i + 1} of the succeeding last position of the communication multiplexer 5 _n
Is terminated by a terminating circuit incorporating the common bus 6 drawn into the own communication multiplexer 5 _n .

As shown in FIG. 7, each communication multiplexer 5 comprises a shelf power supply package 51, a bus control package 52 and a plurality of internal control packages 53, and is mounted in a device frame called a shelf 50.
A plurality of communication multiplexers 5 each constituted by a shelf 50 are installed in the communication multiplexer 5 as illustrated in FIG.
It is installed in 00.

The shelf power supply package 51 supplies power required for the bus control package 52 and the internal control package 53 mounted in each shelf 50 to operate, and the bus control package 52 connects the common bus 6 to each other. The internal control package 53 is provided with a connector or the like for connecting to the internal control package 53, and the internal control package 53 constitutes an electric circuit that realizes the original function of the communication multiplexer 5.

The central controller 1 of the active system or the standby system is
When diagnosing each communication multiplexer 5 connected to the standby channel controller 3, each signal line of the common bus 6 has a predetermined value due to a failure occurring in an arbitrary communication multiplexer 5 _i. When the signal is fixed to the level potential and no signal can be transmitted (hereinafter referred to as the stack state), all the communication multiplexers 5 are regarded as a failure for the diagnosis from the central control unit 1 and the true condition is detected. The troublesome communication multiplexer 5 is not identifiable.

When such a stack state occurs,
Conventionally, a tester manually changes the connection between the common bus 6 and each communication multiplexer 5, or replaces each communication multiplexer 5 with a normal device to execute a diagnosis, thereby performing a trouble communication. The multiplexer 5 was identified.

[0010] As connection changing method, for example, separated from the common bus 6 from the communication multiplexer 5 ₀ sequentially performs diagnostics, if the communication multiplexer 5 is normal diagnosis can remain,
It is determined that the separated communication multiplexer 5 is affected,
Alternatively, from the state in which all the communication multiplexers 5 are once disconnected from the channel controller 3, first, only the communication multiplexer 5 ₀ is connected to the channel controller 3 to execute the diagnosis, and then the communication multiplexers. When 5 ₀ and 5 ₁ are connected and a diagnosis is executed, the number of communication multiplexers 5 connected to the channel control device 3 is sequentially increased in the same manner, and the diagnosis is executed. It is considered that the communication multiplexing device 5 additionally connected to the device is damaged, and as a replacement method, the bus control package 52 of each communication multiplexing device 5 is sequentially replaced with the one confirmed as normal. Although it is considered that the communication multiplexer 5 is exchanged and the fault is recovered, it is determined that the communication multiplexer 5 is afflicted, but each of them takes a lot of time and labor.

[0011]

As is apparent from the above description, in the conventional diagnostic method, when a failure occurs in any communication multiplexer 5 _i and the common bus 6 becomes stuck, the central control unit. In the diagnosis from 1, it is determined that all the communication multiplexers 5 connected to the common bus 6 have failed,
In order to identify the true troubled communication multiplexer 5, the common bus 6 and each communication multiplexer 5 are manually connected or replaced, or each communication multiplexer 5 is manually replaced with a normal device. There is a problem in that much effort and time are spent, except for adopting a method such as repeating diagnosis.

According to the present invention, when a failure occurs in which the common bus connected to the central processing unit becomes stuck, it is possible to identify a device to be diagnosed as a failure without spending a great deal of labor and time. To aim.

[0013]

FIG. 1 is a diagram showing the principle of the present invention. In FIG. 1, reference numeral 100 is a redundant central processing unit, 200 is a device to be diagnosed, and 6 is a common bus that connects each central processing unit 100 and a plurality of devices 200 to be diagnosed.

Reference numeral 101 denotes a central processing unit 1 according to the present invention.
00 power supply control means for the device under diagnosis. 10
Reference numeral 2 is a diagnostic execution means provided in the central processing unit 100 according to the present invention.

Reference numeral 201 denotes each device under diagnosis 20 according to the present invention.
0 is a power supply opening / closing means 201. 202 is
The bus passing means 202 is provided in each device to be diagnosed 200 according to the present invention.

[0016]

The diagnostic device power supply control means 101 instructs the diagnostic device 200 to be turned on and off.

The diagnosis executing means 102 is connected to the common bus 6 in a state in which the power supply control means 101 for the device to be diagnosed instructs to turn on or turn off the power of each device to be diagnosed 200 in a predetermined combination. The device under test 200 is diagnosed.

The power source opening / closing means 201 is based on the designation by the power source controlling means 101 of the device to be diagnosed, and the device to be diagnosed 200 is self-diagnosed.
Turns on and off the power to. In the bus passage means 202, the power source opening / closing means 201 is the self-diagnosis device 200.
When the power supply to the diagnosis target device 200 is cut off, the self-diagnostic device 200 is disconnected from the common bus 6 and the connection between the central processing system device 100 and the other diagnostic device 200 is maintained.

Therefore, when a stack failure occurs in the common bus, the connection state between each device to be diagnosed and the common bus can be automatically changed to perform the diagnosis, which requires a great deal of labor and time for the tester. It is possible to identify a true device to be diagnosed without wasting and, and the reliability and maintainability of the electronic exchange are significantly improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a system monitoring device according to an embodiment of the present invention, FIG. 3 is a diagram showing a shelf power supply package according to an embodiment of the present invention, and FIG. 4 is a bus control according to an embodiment of the present invention. It is a figure which shows a package, and FIG. 5 is a figure which shows the diagnostic processing process by one Example of this invention. The same reference numerals denote the same objects throughout the drawings. Further, the target electronic exchange is as shown in FIGS. 6 to 8.

6, a central control unit 1, a main storage unit 2, a channel control unit 3 and a system monitoring unit 4 are shown as the central processing unit 100 in FIG. 1, and communication is performed as a diagnostic device 200 in FIG. A multiplexing device 5 is shown, and in FIGS.
The setting circuit 41 and the power supply control register 42 as the power supply control means 101 for the device to be diagnosed in FIG.
1, the central control unit 1 has a diagnostic function as illustrated in FIG. 5 as the diagnostic execution means 102 in FIG. 1, and the AND gate 512 is the shelf power supply as the power supply switching means 201 in FIG. Package 51
A control line 8 which is provided inside the system monitoring device 4 and connects the shelf power supply package 51 in each communication multiplexing device 5 is provided, and the passage switches 521 and 522 and the passages are provided as the bus passage means 202 in FIG. A bus 523 is provided within the bus control package 52.

The power supply control register 42 corresponds to each communication multiplexer 5 connected to the common bus 6 of its own system.
(N + 1) power supply control bits b _i (where i is 0 to n) are accumulated, and normally each power supply control bit b _i is set to logic “0”.

When the power supply control bit b _i is set to logic "0", the power supply control signal c _i transmitted from the system monitor 4 to the shelf power supply package 51 via the control line 8 _i is also logic "0". Is set to ".

In each shelf power supply package 51, a normal logic "1" signal is input to the AND gate 512 from the manual switch 511, and the system monitoring device 4
When the power control signal c _i which is input to AND gate 512 via the control line 8 _i from the power control register 42 of the inner is set to a logic "0", the power-off portion 513 from the AND gate 512 The input power cutoff signal s is also set to logic “0”, and the power cutoff unit 513 is set to the conductive state.

The power cutoff unit 513 is set to the conductive state.
Input power P such as commercial power_iPower
The output power supplied to the circuit 514 and output from the power supply circuit 514.
Source P _oThe bus system installed in the same shelf 50
Provided to the control package 52 and each internal control package 53
To pay.

On the other hand, the pass switches 521 and 522 in each bus control package 52 are in the operating state (the broken line state in FIG. 4) when the output power P _o is supplied from the shelf power supply package 51 in the same shelf 50. )
And the passage switch 521 connects the common bus 6 connected to the preceding communication multiplexer 5 _i-1 (however, the preceding communication multiplexer for the communication multiplexer 5 ₀ is the channel controller 3). , Same shelf 50 via internal bus 7
The internal switch package 522 is pulled into the internal control package 53, and the pass switch 522 is installed in the internal control package 5 in the same shelf 50.
The internal bus 7 pulled in 3 is connected to the subsequent communication multiplexer 5 _{i + 1} via the common bus 6. In the communication multiplexer 5 _n , the passage switch 522 is the common bus 6
Instead of being connected to a terminal circuit, it is connected to a termination circuit (not shown).

2 to 6, when the tester executes the diagnosis of each communication multiplexer 5 from the central controller 1 via the channel controller 3 and the common bus 6, the all communication multiplexer 5 If it is determined that the fault occurs, the tester instructs the central control unit 1 to execute the diagnosis as illustrated in FIG.

Central control unit 1 to which the diagnosis instruction is transmitted
Controls the setting circuit 41 in the system monitoring device 4, and the power control bit b stored in the power control register 42.
_{0 to} b _n are initialized to logic “0” (step S in FIG. 5).
1), and the index i designating each communication multiplexer 5 _i held in the central control unit 1 is initialized to (0) _D (where D is a decimal number), and the frontmost communication multiplexer ₅₀ is designated (step S2).

Next, the central control unit 1 first gives an instruction to set the power supply control bit b _i (= b ₀ ) to the logic "1" in order to disconnect only the communication multiplexer 5 ₀ from the common bus 6 first. When the setting circuit 41 is transmitted to the setting circuit 41 in the system monitoring device 4 (step S3), the setting circuit 41 sets only the power control bit b ₀ stored in the power control register 42 to the logic “1”.

As a result, the power supply control signal c ₀ input to the logical product gate 512 in the shelf power supply package 51 from the power supply control register 42 via the control line 8 ₀ is also set to the logical "1", and the logical product gate The power cutoff signal s input to the power cutoff unit 513 from 512 is also set to logic "1", and the power cutoff unit 513 is set to the cutoff state.

As a result, the power supply cutoff unit 513 causes the power supply circuit 5 to operate.
The input power supply P _i supplied to the power supply circuit 14 is shut off,
Each bus control package of the communication multiplexer 5 in ₀ from 5
2 and the internal control package 53 are not supplied with the output power P _o .

In the bus control package 52, when the output power P _o is no longer supplied from the shelf power supply package 51, the pass switches 521 and 522 are restored (solid line state in FIG. 4), and the pass switch 521 is connected to the channel controller 3. The common bus 6 to be connected is switched from the internal bus 7 to the passage bus 523, and the passage switch 52
Reference numeral 2 switches and connects the common bus 6 connected to the subsequent communication multiplexer 5 ₁ from the internal bus 7 to the passage bus 523.

As a result, the internal control package 53 of the communication multiplexer 5 ₀ is separated from the common bus 6, and the common bus 6 connected to the channel controller 3 passes through the passage bus 523 to the subsequent communication multiplexer. Common bus 6 connected to the digitalization device 5 ₁
Directly connected to.

Next, the central controller 1 sequentially executes the diagnosis of each of the communication multiplexers 5 _{1 to} 5 _n connected to the common bus 6 (step S4). At this time, if the cause of the stack failure is the communication multiplexer 5 ₀ , the communication multiplexer 5 ₀
Should be disconnected from the common bus 6, the communication multiplexers 5 _{1 to} 5 _n should be able to be diagnosed. However, if the cause of the stack failure is other than the communication multiplexer 5 ₀ ,
Even if the communication multiplexer 5 ₀ is disconnected from the common bus 6, the stack failure is still eliminated, and the communication multiplexer 5
The diagnosis of _{1 to} 5 _n should be impossible.

After diagnosing the communication multiplexers 5 _{1 to} 5 _n , the central controller 1 monitors the system in order to connect the communication multiplexer 5 ₀ , which has been disconnected from the common bus 6, to the common bus 6 again. The power control bit b is set in the setting circuit 41 in the device 4.
_When an instruction to set _i (= b ₀ ) to logic “0” is transmitted (step S5), the setting circuit 41 causes the power supply control register 4 to operate.
The power control bit b ₀ stored in 2 is reset to the original logic “0”, and as a result, the power control register 42 passes through the control line 8 ₀ to the AND gate 512 in the shelf power package 51. The input power control signal c ₀ is also reset to logic “0”, and the power cutoff signal s input from the AND gate 512 to the power cutoff unit 513 is also logic “0”.
, The power cutoff unit 513 is reset to the conductive state, the input power supply P _i is supplied again to the power supply circuit 514, and the output power supply P _o is supplied from the power supply circuit 514 to each bus control package 52 and the internal control package 53. Supply will be resumed.

As a result, in the bus control package 52
Pass-through switches 521 and 522 are reactivated and common
The bus 6 is again the communication multiplexer 5₀Internal control package inside
Communication multiplexer 5₀Via via
Communication multiplexer 5₁Through 5 _nThe connection will be extended.

Here, the central control unit 1 analyzes the diagnostic results for the communication multiplexers 5 _{1 to} 5 _n (step S
6) If the diagnosis is possible, the communication multiplexer 5
_It is determined that ₀ is in trouble, and detailed diagnosis is started for the communication multiplexer 5 ₀ (step S7), but if the diagnosis is not possible, the communication multiplexer 5 ₀ is in trouble. In order to continue the diagnosis, (1) _D is added to the index i and updated to (1) _D (step S
8) After confirming that the index does not exceed the maximum value n (step S9), by repeating step S3 and thereafter, only the communication multiplexer 5 ₁ is disconnected from the common bus 6, and then each communication multiplex is performed. The devices 5 ₀ and 5 _{2 to} 5 _n are diagnosed, the diagnostic results are analyzed, and if the diagnosis is possible, it is determined that the communication multiplexer 5 ₁ has suffered a failure, and the communication multiplexer 5 ₁ Although detailed diagnosis is started for 5 ₁ , if the diagnosis is not possible, it is determined that the communication multiplexer 5 ₁ is not affected.

In the same manner as described above, the central control unit 1 is used to communicate
Signal multiplexer 5_iThe index i is incremented until is identified.
From step S3 onward, the index i is stepped to the maximum value n
Disabling communication multiplexer 5_iIs not detected
(Step S9), the communication multiplexer 5₀Through 5_nTo
Determines that the cause of the failure does not exist, and the communication multiplexer 5 ₀
Through 5_nOther than that, for example, diagnosis of the common bus 6 and the like is executed.

As is apparent from the above description, according to this embodiment, when the tester who encounters a stack fault instructs the central control unit 1 to execute the diagnosis as illustrated in FIG. Multiplexing device 5 _i addressed to one, and common bus 6 sequentially
By performing the diagnosis by disconnecting from the device, it is possible to automatically identify the affected communication multiplexer 5 _i .

It is to be noted that FIGS. 2 to 5 are merely embodiments of the present invention, and the diagnostic processing steps executed by the central control unit 1 are not limited to those shown in the drawings. The communication multiplexers 5 _{0 to} 5 _n of the
After disconnecting from each other, various modifications such as connecting each communication multiplexer 5 _i to the common bus 6 destined for one unit and executing a diagnosis are considered, but in any case, the effect of the present invention is obtained. does not change. Further, the central processing unit 100 and the device to be diagnosed 200 to which the present invention is applied are limited to the central control unit 1, the main storage unit 2, the channel control unit 3 and the system monitoring unit 4, and the communication multiplexing unit 5 which are shown. Never happen,
Many other modifications can be considered, but in any case, the effect of the present invention does not change.

[0041]

As described above, according to the present invention, in the electronic exchange, when a stack failure occurs in the common bus,
Since the diagnosis can be executed by automatically changing the connection state between each device under test and the common bus, it is possible to identify the true device under test without wasting a lot of labor and time on the tester. It is possible to improve the reliability and maintainability of the electronic exchange.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing a system monitoring device according to an embodiment of the present invention.

FIG. 3 illustrates a shelf power package according to an exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a bus control package according to an embodiment of the present invention.

FIG. 5 is a diagram showing a diagnostic process according to an embodiment of the present invention.

FIG. 6 is a diagram showing an example of an electronic exchange subject to the present invention.

FIG. 7 is a diagram showing an example of a communication multiplexer shelf.

FIG. 8 is a diagram showing an example of a communication multiplexing device rack.

[Explanation of symbols]

 1 Central Control Unit 2 Main Memory Unit 3 Channel Control Unit 4 System Monitoring Device 5 Communication Multiplexing Device 6 Common Bus 7 Internal Bus 8 Control Line 41 Setting Circuit 42 Power Control Register 50 Shelf 51 Shelf Power Package 52 Bus Control Package 53 Internal Control Package 100 Central processing system device 101 Diagnosis device power supply control means 102 Diagnosis execution means 200 Diagnosis device 201 Power supply opening / closing means 202 Bus passing means 500 Communication multiplexing device rack 511 Manual switch 512 Logical product gate 513 Power cutoff part 514 Power supply circuit 521 522 transit switch 523 transit bus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuriko Yamashita 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (1)

[Claims] 1. A central processing system device (100) which is duplicated.
In an electronic exchange in which a plurality of devices to be diagnosed (200) are respectively connected by a common bus (6), the central processing unit device (100) is instructed to turn on and off the power to each device to be diagnosed (200). In a state in which the diagnostic device power control means (101) for performing the diagnostic device power control means (101) instructs the diagnostic device power control means (101) to turn on or off the power of each of the diagnostic devices (200) in a predetermined combination, A diagnostic execution means (102) for executing a diagnosis of each of the diagnosed devices (200) connected to the common bus (6) is provided, and each of the diagnosed devices (200) controls the diagnosed device power supply. Based on the designation by the means (101), the power source opening / closing means (201) for turning on / off the power source to the self-diagnosis device (200), and the power source opening / closing means (201) are self-diagnostics. Equipment (200)
If the power to the self-diagnosis device (20
0) is separated from the common bus (6), and a bus passage means (202) for maintaining the connection between the central processing unit (100) and another device to be diagnosed (200) is provided. method.