JPH0368240A - Fault detecting method for centralized monitor system - Google Patents

Abstract

PURPOSE:To detect the occurrence of trouble in the CPU of a communication processing part of a transmission equipment by providing a multiplexer with a fixed pattern generating part and a gate circuit and providing a monitor device with a fixed pattern detecting part. CONSTITUTION:A gate circuit 250 provided in a second communication processing part 500 of each of multiplexers 200-1 to 200-n outputs a signal indicating the normalcy in response to an enquiry signal from a monitor device 100 at the time of normal operation of the processing part 500. If trouble occurs in the processing part 500, the input from a fixed pattern generating part 700 is outputted. A fixed pattern detecting part 350 provided in a first communication processing part 300 of the device 100 takes the output from the generating part 700 as the, input to detect the occurrence of trouble at the time of the occurrence of trouble in processing parts of multiplexers 200-1 to 200-n. As the result, the occurrence of trouble in CPUs of processing parts 500 of multiplexers 200-1 to 200-n where trouble relatively easily occur can be detected to efficiently perform the maintenance work.

Description

[Detailed Description of the Invention] ((Already needed) Regarding a fault detection method in a centralized monitoring system for monitoring transmission equipment, a fault detection method in a centralized monitoring system that can detect the occurrence of a fault in cpυ of a communication processing unit of a transmission equipment The system has a multiplexing unit that multiplexes human data, and a second communication processing unit that returns a signal indicating the presence or absence of a failure in response to an inquiry signal from the monitoring device regarding the occurrence of a failure. A plurality of multiplexing devices and a first communication process that outputs an inquiry signal indicating the occurrence of a fault to the multiplexing device, receives a return signal from the multiplexing device, and detects whether or not a fault has occurred in the multiplexing device. In a fault detection method in a centralized monitoring system comprising a monitoring device having a second communication processing section, the multiplexing device has a fixed communication processing section that detects when a fault occurs in the second communication processing section and generates and outputs a fixed pattern of pulses. A pattern generation section is provided,
When the second communication processing unit is operating normally, it outputs a signal indicating normality to the second communication processing unit of the multiplexing device in response to an inquiry signal from the monitoring device, and when a failure occurs in the second communication processing unit, it outputs a signal indicating normality. A gate circuit is provided to output the human power from the fixed pattern generating section, and the output from the fixed pattern generating section is sent to the first communication processing section of the monitoring device when a failure occurs in the second communication processing section of the multiplexing device. A fixed pattern detection section that manually detects the occurrence of a failure is provided, and the configuration is configured to detect a failure that occurs in the second communication processing section of the multiplexing device.

[Industrial application field]

The present invention relates to an improvement in a fault detection method in a centralized monitoring system for monitoring transmission equipment.

In order to efficiently and timely monitor the occurrence of failures in transmission equipment in multiple stations, including unmanned stations, it is necessary to perform intensive monitoring at a single location.

At this time, there is a need for a fault detection method in a centralized monitoring system that can detect the occurrence of a fault in the CPU of the communication processing unit of the transmission device.

[Conventional technology]

FIG. 3 is a block diagram showing the configuration of a conventional centralized monitoring system.

In FIG. 3, terminal equipment or multiplexing equipment 2-1, 2-2 and 2-3 as monitored equipment are station buildings A and B, respectively.
and C, and is connected to the monitoring device l by a transmission path such as a public line.

At the same time, a signal for fault detection is transmitted from the communication processing unit 3 of the monitoring device 1 to the multiplexers 2-1, 2-2 and 2-3 via a transmission path, and a signal designating the multiplexer to be detected. (so-called polling). In each multiplexing device 2-1, 2-2, and 2-3, the communication processing unit 5 receives this, and when the multiplexing device 2-1, 2-2, and 2-3 receives this and specifies its own device (for example, 2-■
), in the multiplexing device (2-1 in this case), the CPU (not shown) in the communication processing section 5 sent back a signal indicating the presence or absence of a failure (so-called selecting).

In the monitoring device 1, the detection target is multiplexed device 2-1.2 to 2.
．． 2 to 3 in order to detect the occurrence of a failure in each multiplexing device.

[Problem to be solved by the invention]

However, in the configuration of the above-mentioned centralized monitoring system, no response occurs when a transmission path failure, a power failure of the multiplexing device as a monitored device, or an abnormality occurs in the CPU of the communication processing unit, and the monitoring device side cannot identify the cause. The problem was that it was difficult to perform maintenance work because it was difficult to tell which one was which.

Therefore, an object of the present invention is to
An object of the present invention is to provide a fault detection method in a centralized monitoring system that can detect the occurrence of a fault in a PU.

[Means for Solving the Problems] The above problems are solved by the configuration of the centralized monitoring system shown in FIG.

That is, in FIG. 1, it has a multiplexing unit that multiplexes input data, and a second communication processing unit 500 that returns a signal indicating whether or not a failure has occurred in response to an inquiry signal from the monitoring device 100 regarding the occurrence of a failure. Multiple multiplexing devices 200-1
~200-n, and a first communication processing unit that outputs an inquiry signal indicating the occurrence of a failure to the multiplexing device, receives a return signal from the multiplexing device, and detects whether or not a failure has occurred in the multiplexing device. In a failure detection method in a centralized monitoring system consisting of a monitoring device lOO having 300, 700 is provided in the multiplexing device, detects when a failure occurs in the second communication processing unit, and generates a fixed pattern of pulses. This is a fixed pattern generation section that outputs a fixed pattern.

250 is provided in the second communication processing unit of the multiplexing device, and when the second communication processing unit is operating normally, it outputs a signal indicating normality in response to the inquiry signal from the monitoring device, and when the second communication processing unit is in trouble, This is a gate circuit that outputs the human power from the fixed pattern generation section when this occurs.

350 is provided in the first communication processing section of the monitoring device, and when a fault occurs in the second communication processing section of the multiplexing device, the fixed pattern generating section 350 manually outputs the output from the fixed pattern generation section to detect the occurrence of the fault. This is a pattern detection section.

Then, the configuration is configured to detect a failure occurring in the second communication processing section of the multiplexing device.

(Function) In FIG. 1, in the gate circuit 250 provided in the second communication processing unit 500 of the multiplexers 200-1 to 200-n, when the second communication processing unit 500 is in normal operation, In response to the inquiry signal, a signal indicating normality is outputted, and when a failure occurs in the second communication processing section 500, the human power from the fixed pattern generation section 700 is outputted.

On the other hand, in the fixed Bakun detection section 350 provided in the first communication processing section 300 of the monitoring device 100, the multiplexing device 20
When a failure occurs in the second communication processing unit 500 of 0-1 to 200-0, the output from the fixed pattern generation unit 700 is manually input to detect the occurrence of the failure.

As a result, multiplexing devices 200-1 to 200-2, which are relatively likely to
The occurrence of a failure in the CPU of the second communication processing unit 500 of 00-n can be detected, and maintenance work can be performed efficiently.

(Embodiment) FIG. 2 is a block diagram showing the configuration of a centralized monitoring system according to an embodiment of the present invention.

The same reference numerals indicate the same objects throughout the figures.

In FIG. 2, in response to polling from the monitoring device 10, for example, response data indicating that the CPU 21 in the communication processing unit 50 of the multiplexing device 20-1 is normal is outputted, and an AND circuit (hereinafter referred to as AND) is output. 25 (referred to as a circuit). The other input terminal of the AND circuit 25 receives a signal "1' (
(normal time) is added, and the response data output from the CPU 21 is added from the AND circuit 25 to the monitoring device IO via the transmission path (using service bits, etc.). In the monitoring device 10, the CPU 31 in the communication processing unit 30 receives this,
CPII 2 in the communication processing unit 50 of the multiplexer 20-l
I know that 1 is normal.

Further, the CPU in the communication processing unit 50 of the multiplexing device 20-1
When a failure occurs in the CPU 21, the multiplexer 20-1 detects the failure in the CPU 21 using the failure detection unit 22 provided in the communication processing unit 50 in response to polling from the monitoring device 10, and multiplexes the detected signal. It is added to the fixed pattern generation section 70 newly provided in the device 20-1. Fixed pattern generation section 70
Then, the CPU failure detection unit 72 receives this. On the other hand, the polling signal from the monitoring device 10 is branched and also applied to the fixed pattern generator 70,
When a failure occurs in the U 21 and the monitoring device 10 designates its own device, the PPG 71 outputs a certain pattern of pulses (for example, “11011”) and applies them to the input terminal of the AND circuit 25. A signal "1" is applied to the other input terminal of the AND circuit 25 when a failure occurs in the CPU 21.

As a result, from the AND circuit 25, the fixed pattern generator 7
A constant pattern of pulses at the output of PPG 71 within 0 (
In this case, “11011”) is output and added to the monitoring device 10. In the monitoring device 10, the fixed pattern detection section 35 provided in the communication processing section 30 receives this, and the CP
Detects that a failure has occurred in U21.

Even when a failure occurs in the CPUs in the other multiplexing devices 20-2 to 20-n, detection is performed in the same manner as described above. In this way, the occurrence of a failure in the CPU within the multiplexing device is detected.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to detect the occurrence of a failure in CPt1 of the communication processing unit, which is relatively easy to occur, and is effective in maintenance work.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a block diagram showing the configuration of a centralized monitoring system according to an embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of a conventional centralized monitoring system. In the figure, 250 is a gate circuit, 350 is a fixed pattern detection section, and 700 is a fixed pattern generation section. Audience of the Lord

Claims (1)

[Claims] A multiplexing unit that multiplexes input data, and a monitoring device (1
The second communication processing unit (50) returns a signal indicating whether or not a failure has occurred in response to an inquiry signal regarding the occurrence of a failure from the second communication processing unit (50).
0) having a plurality of multiplexers (200-1 to 200-
n) and a first communication process of outputting an inquiry signal indicating the occurrence of a failure to the multiplexing device, receiving a return signal from the multiplexing device, and detecting whether or not a failure has occurred in the multiplexing device. A fault detection method in a centralized monitoring system comprising a monitoring device (100) having a second communication processing section (300), the multiplexing device detects when a fault occurs in the second communication processing section, and A fixed pattern generation section (700) that generates and outputs pulses is provided in a second communication processing section of the multiplexing device, and when the second communication processing section is in normal operation, it responds to an inquiry signal from the monitoring device. A gate circuit (250) that outputs a signal indicating normality and outputs an input from the fixed pattern generation section when a failure occurs in the second communication processing section is provided, and the first communication processing section of the monitoring device , the second one of the multiplexer
A fixed pattern detection section (350) is provided which inputs the output from the fixed pattern generation section to detect the occurrence of a failure when a failure occurs in the second communication processing section of the multiplexing device. A failure detection method in a centralized monitoring system, characterized in that a failure occurring in a central monitoring system is detected.