JPH0792875B2 - Central alarm monitoring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an alarm centralized monitoring device for centrally monitoring a failure of a device. In particular, the present invention relates to an alarm centralized monitoring device in which two monitoring devices collect alarm information for a predetermined monitored device.

〔Overview〕

The present invention relates to an alarm centralized monitoring device for centrally monitoring device faults, in which a plurality of monitored devices are divided into two groups, and a monitoring device provided between the two groups for performing alarm monitoring of one group. The main monitoring device is the monitoring device that is installed at the end of the other group and monitors the other group's alarms.The main monitoring device polls the slave monitoring device and collects the alarm information collected by the slave monitoring device. By collecting and alarm information by directly polling the group to be monitored when a failure occurs in the slave monitoring device, economically two main monitoring devices and slave monitoring devices can be provided for a predetermined monitored device. It allows for centralized alarm monitoring.

[Conventional technology]

As shown in FIG. 2, the conventional alarm centralized monitoring device assigns one sub-monitoring device 501 and 502 to each monitored device group (30, 40; 70, 80), which is different from the main monitoring device. By installing one monitoring device 100 and also providing dedicated communication lines 91 and 92 between the main monitoring device and the slave monitoring device, the alarm information is collected.

[Problems to be solved by the invention]

However, in such a conventional alarm centralized monitoring device, another main monitoring device 100 is required to have a main monitoring means, and a dedicated monitoring device between the main monitoring device 100 and the slave monitoring devices 501 and 502 is required. Since the communication lines 91 and 92 are required, there is a drawback that the price increases in the case of the alarm centralized monitoring device of a medium scale.

The present invention solves the above-mentioned drawbacks, and an object thereof is to provide an alarm centralized monitoring device which can economically provide two alarm centralized monitoring devices, a main monitoring device and a slave monitoring device, for a predetermined monitored device. And

[Means for solving problems]

The present invention provides a plurality of monitored devices divided into two groups, and a first monitoring device which is provided between the two groups and which monitors an alarm of one group via a communication line for alarm collection ( 50) and a second monitoring device (10) which is provided at the end of the other group and monitors the alarm of the other group via an alarm collecting communication line. The monitoring device of, transfer means for transferring the alarm information of the one group to polling from the second monitoring device,
In the event of a failure, including a direct connection means for spontaneously directly connecting the alarm collecting communication line of the first monitoring device and the alarm collecting communication line of the second monitoring device, the second monitoring device, The first monitoring device is polled to collect the alarm information transferred by the transfer device, and the one group is polled via the direct connection device to collect the alarm information. And a second collecting means for collecting.

[Action]

The first collecting means of the second monitoring device polls the first monitoring device. The first monitoring device transfers the alarm information of one group to the second monitoring device by the transfer means. The second monitoring device collects this alarm information by the first collecting means. Further, when a failure occurs in the first monitoring device, a direct connection means directly connects the alarm collecting communication line between the first monitoring device and the second monitoring device. The second collection means of the second monitoring device polls one of the groups via this direct connection means to collect alarm information. By the above-described operation, it is possible to economically perform the alarm centralized monitoring of the predetermined monitored device by the main monitoring device and the slave monitoring device.

〔Example〕

 Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an alarm centralized monitoring apparatus according to an embodiment of the present invention.

Here, a feature of the present invention is an alarm centralized monitoring portion surrounded by a dashed line shown in the figure. That is, the communication control / alarm collection circuit 11 of the main monitoring device 10 is the monitored device on the main station side via the interface 12 of the alarm collecting communication line and the alarm collecting communication line 20 on the main monitoring device side.
30 and 40, and further, via the interfaces 32 and 42, the addresses on the main station side are connected to the setting circuits 31 and 41.
As described above, the main monitoring device 10 performs alarm monitoring of the monitored devices 30, 40 on the main station side.

Further, the communication control / alarm collection circuit 51 of the slave monitoring device 50 is connected to the monitored devices 70, 80 on the slave station side via the interface 53 of the alarm collecting communication line and the alarm collecting communication line 60 on the slave monitoring device 50 side. And further interface
It is connected to the address setting circuits 71 and 81 on the slave station side via 72 and 82. As described above, the slave monitoring device 50 performs alarm monitoring of the monitored devices 70 and 80 on the slave station side.

Further, the main monitoring device 10 is connected to the slave monitoring device 50 via the alarm collecting communication line 20, and further connected to the communication control / alarm collecting circuit 51 via the interface 52 of the main station monitoring device communication line. . As described above, the main monitoring device 10 collects the alarm information from the slave monitoring device 50 and monitors the alarms of the monitored devices 70 and 80 on the slave station side.

Further, when the slave monitoring device 50 has a failure such as power failure, the main monitoring device 10 is connected to the slave device monitored devices 70, 80 via the direct connection circuit 54 of the alarm collecting communication lines 20, 60 to perform alarm monitoring. .

The operation of the alarm centralized monitoring device having such a configuration will be described. In the figure, each monitored device 30, 40, 70, 80 has an address setting circuit 31, 41, 71, 81 and sets a unique address. The monitored devices 70, 80 are
In response to the polling from the alarm collection circuit 51, the alarm information is returned to the slave monitoring device 50 and stored in the communication control / alarm collection circuit 51. The monitored devices 30, 40 return alarm information to the main monitoring device 10 in response to polling from the communication control / alarm collection circuit 11, and the communication control / alarm collection circuit 11
To store.

The master monitoring device 10 polls the slave monitoring device 50 to collect the alarm information of the monitored devices 70 and 80, and the slave monitoring device 50 returns the information stored in the communication control / alarm collecting circuit 51. To do. When the slave monitoring device 50 has a failure such as power failure, the slave monitoring device 50 itself directly connects the alarm collecting communication circuits 20 and 60 by the direct connection circuit 54. At this time, even if the main monitoring device 10 polls the slave monitoring device 50, data is not returned from the slave monitoring device 50 for a predetermined time or longer, and thus the main monitoring device 10 determines that the slave monitoring device 50 has failed. The monitored devices 70 and 80 are directly polled to collect alarm information.

With such a configuration, as compared with the conventional alarm centralized monitoring system of FIG. 2 in which a subordinate monitoring device is provided for each monitored group and a main monitoring device for supervising these subordinate monitoring devices is further provided, In the present invention, since the main monitoring device can also function as the slave monitoring device, an alarm centralized system can be realized at low cost. Further, in the present invention, since the main monitoring device and the slave monitoring device are used in common, it is possible to eliminate the need for a dedicated line connecting the master-slave monitoring device, which has been conventionally required.
Further, the economical efficiency of the system can be improved.

〔The invention's effect〕

As described above, the present invention provides the alarm collecting communication line between the master monitoring device and the slave monitoring device. In addition, by providing a bypass circuit for the slave monitoring device, it is economically possible to simultaneously monitor alarms for a predetermined monitored device by two units, the main monitoring device and the slave monitoring device, even when the slave monitoring device has a failure such as power failure. There is an excellent effect that the main monitoring device can monitor alarms.

[Brief description of drawings]

FIG. 1 is a block diagram of an alarm centralized monitoring apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 10 ... Main monitoring device, 11, 15 ... Communication control / alarm collection circuit, 12, 32, 42, 52, 53, 72, 82 ... Interface, 2
0, 60 ... Communication line for alarm collection, 30, 40, 70, 80 ... Monitored device, 31, 41, 71, 81 ... Address setting circuit, 50 ... Slave monitoring device, 54 ... Direct connection circuit.

Claims (1)

[Claims] 1. A plurality of monitored devices divided into two groups, and a first monitoring device which is provided between the two groups and which monitors an alarm of one group via a communication line for alarm collection. And a second monitoring device which is provided at the end of the other group and monitors the alarm of the other group via the alarm collecting communication line, the first monitoring device comprising: Transfer means for transferring the alarm information of the one group to polling from the second monitoring device; an alarm collecting communication line of the first monitoring device when the first monitoring device itself fails; And a direct connection means for directly connecting an alarm collecting communication line of the second monitoring device, wherein the second monitoring device polls the first monitoring device and performs the switching. A first collecting means for collecting the alarm information transferred by the means, and a second collecting means for collecting the alarm information by polling the one group via the direct connection means. An alarm centralized monitoring device.