JPH06162373A - Alarm monitor system - Google Patents

Abstract

PURPOSE:To quickly collect alarms from plural devices to be monitored even with a personal computer which has a small number of communication lines and a low speed with respect to the alarm monitor system where alarms from plural transmission equipments or the like are collected by devices to be monitored and are sent to a remote centeral monitor device through communication lines and are collected by this central monitor device. CONSTITUTION:Alarm sending parts of plural devices 1 to 3 to be monitored which collect and send alarms from respective parts are connected in a multidrop form by serial interface, and plural, devices 1 to 3 to be monitored transmit a pulse to a central monitor device 10, which collects alarm, at the time of the change of the number of inputted alarms; and when the pulse is inputted, the central monitor device 10 sends an alarm transmission command to the device to be monitored, which outputs the pulse, in serial through the multidrop connection part, and the device to be monitored receives the alarm transmission command to transmit an alarm to the central monitor device 10 in serial through the multidrop connection part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects alarms from a plurality of transmission devices or the like that rarely send out alarms by a monitored device and sends them to a centralized monitoring device at a distant place via a communication line.
The present invention relates to improvement of an alarm monitoring system that collects alarms with a centralized monitoring device.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a conventional alarm monitoring system, and FIG. 5 is a block diagram of another conventional alarm monitoring system.

In FIG. 4, the monitored devices 1 ', 2', 3'for collecting alarms from a plurality of transmission devices and sending the alarms are a modem 18, a communication line 13, a modem 19 and a modem 2, respectively.
0, the communication line 14, the modem 21, the modem 22, the communication line 15, and the modem 23 are connected to the respective interfaces 30, 31, 32 of the centralized monitoring device 10 ', and the monitored devices 1', 2 ', 3'. The alarms sent from the respective computers are output from the respective outputs of the interfaces 30, 31, and 32 to the personal computer 3
3 is input and the personal computer 33 collects alarms.

In FIG. 5, a monitored device 1 ", 2", 3 "for collecting alarms from a plurality of transmission devices and sending the alarms and a centralized monitoring device 10" are connected to a modem 24, a communication line 16, and a modem 25. , The modem 27, the communication line 17, and the modem 26 are connected in a loop, and the alarms from the monitored devices 1 ", 2", 3 "are monitored by the monitored devices 1", 2 "shown in FIG. 5 (A). ，
At the data transmission time allotted to 3 ", the data is sent out through the loop, collected by the collecting unit 34 of the centralized monitoring device 10" every one cycle, and the collected alarm is sent to the personal computer 35. I try to collect.

[0005]

However, the alarm monitoring system of FIG. 4 requires as many communication lines and interfaces as the number of monitored devices, and the personal computer 33 must control a large number of interfaces 30 to 32 at the same time. However, in the alarm monitoring system of FIG. 5, the alarm monitoring system of FIG. 5 collects alarms from the monitored devices 1 ″, 2 ″, and 3 ″ at a cycle shown in FIG. 1 ”,
There is a problem that it takes a long time to collect the alarm because it becomes the total of the data transmission time allocated to 2 "and 3". In this case, if the cycle is shortened, a high speed communication line, a modem and the like are required, and a high speed monitoring device is also required.

An object of the present invention is to provide an alarm monitoring system capable of promptly collecting alarms from a plurality of monitored devices even with a personal computer having a small number of communication lines and a low speed.

[0007]

FIG. 1 is a block diagram showing the principle of the present invention. As shown in FIG. 1, a plurality of monitored devices 1, 2 and 3 for collecting and transmitting alarms from respective units are connected to a multi-drop via a serial interface,
Moreover, the plurality of monitored devices 1, 2 and 3 transmit a pulse to the centralized monitoring device 10 that collects alarms when the number of alarms to be input changes, and the centralized monitoring device 10 receives a pulse. , Serially sends an alarm transmission command to the monitored device that has output the pulse via the multi-drop connection,
The monitored device receiving the alarm transmission command is configured to serially transmit an alarm to the centralized monitoring device 10 via the multi-drop connection unit.

[0008]

According to the present invention, the monitored device, which has changed the number of alarms to be input, sends a pulse to the centralized monitoring device 10. Then, the centralized monitoring device 10 sends an alarm transmission command to the monitored device to which the pulse has been sent, via the multi-drop connection section via the serial interface.

The monitored device which has received the alarm transmission command sends an alarm to the centralized monitoring device 10 through the multi-drop connection section through the serial interface, and the centralized monitoring device 10 collects the alarms.

Therefore, the centralized monitoring device 10 is located far away,
When connecting via a communication line, the pulses output from each of the monitored devices 1, 2 and 3 are sent to the centralized monitoring device 10 via the first communication line as a serial signal in the parallel / serial conversion unit to generate an alarm. If the second command line between the multi-drop connection section and the centralized monitoring device 10 is used for the transmission command and alarm transmission, the number of communication lines is small and a low-speed personal computer is used for the centralized monitoring device 10. However, it will be possible to collect alarms promptly.

[0011]

2 is a block diagram of an alarm monitoring system according to an embodiment of the present invention, and FIG. 3 is a block diagram of essential parts of a monitored device according to an embodiment of the present invention.

Since the monitored devices 1, 2 and 3 for collecting alarms from a plurality of transmission devices in FIG. 2 are configured as shown in FIG. 3, the operation of the monitored device will be described with reference to FIG. When the number of alarms input from a plurality of transmission devices changes, the alarm number change detection unit 42 detects this and inputs a pulse as a parallel signal to the parallel / serial conversion unit 4 in FIG. To send to.

When an alarm transmission command is sent from the centralized monitoring device 10 via the interface conversion part 5 of FIG. 2, it is sent to the command detection part 43 via the buffer 44 to see if it is addressed to itself. If the signal is addressed to its own device,
The serial alarm is sent to the serial converter 40 and the 3-state buffer 41 and enabled, and the input alarm is converted into a serial signal by the parallel-serial converter 40 and sent to the interface converter 5 of FIG. It is sent to the device 10.

In FIG. 2, the monitored devices 1, 2,
The lines for the alarm transmission command and the alarm signal which are serial signals to 3 are connected to the multi-drop, and this is connected to the interface conversion unit 5.

Further, the pulse outputs of the monitored devices 1, 2 and 3 are input to the parallel / serial conversion section 4 and converted into serial signals,
Input is made to the personal computer 50 of the centralized monitoring device 10 via the modem 6, the communication line 11, and the modem 7.

The interface converter 5 includes a modem 8,
The personal computer 50 of the centralized monitoring device 10 is connected via the communication line 12 and the modem 9. Therefore, when the number of alarms input from the transmission device to the monitored devices 1, 2 and 3 changes, the monitored device 1, for example, which has changed the number of alarms, sends a pulse with the address of its own device, and the parallel The serial converter 4 converts the serial signal into a serial signal, and the personal computer 5 of the central monitoring apparatus 10 through the modem 6, the communication line 11, and the modem 7.
Send to 0.

Then, the personal computer 50 sends an alarm transmission command to the monitored device 1 that has sent the pulse via the modem 9, the communication line 12, the modem 8, the interface conversion unit 5, and the multi-drop connection unit.

Then, the monitored device 1 sends an alarm to the personal computer 50 of the centralized monitoring device 10 via the multi-drop connection unit, the interface conversion unit 5, the modem 8, the communication line 12, and the modem 9, and the personal computer 50 issues an alarm. collect.

Therefore, even if the number of communication lines is small and a low-speed personal computer is used as the centralized monitoring device 10, alarms can be promptly collected. In this alarm monitoring system, when the monitored devices 1, 2 and 3 collect and send an alarm from a device such as a transmission device that rarely issues an alarm, even if a multi-drop connection is made, an alarm transmission command and an alarm are sent. Since the transmissions hardly overlap, it can be used sufficiently.

[0020]

As described in detail above, according to the present invention, the alarms from a plurality of transmission devices or the like that rarely send out alarms are collected by the monitored device, and the centralized monitoring is performed at a distant place via the communication line. There is an effect that an alarm monitoring system for sending an alarm to the device and collecting the alarm by the centralized monitoring device can be configured to promptly collect the alarm even if the number of communication lines is small and a low-speed personal computer is used for the centralized monitoring device.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention,

FIG. 2 is a block diagram of an alarm monitoring system according to an embodiment of the present invention,

FIG. 3 is a block diagram of a main part of a monitored device according to an embodiment of the present invention,

FIG. 4 is a block diagram of a conventional alarm monitoring system,

FIG. 5 is a block diagram of another conventional alarm monitoring system.

[Explanation of symbols]

1, 2, 3, 1 ', 2', 3 ', 1 ", 2", 3 "are monitored devices, 4, 40 is a parallel / serial conversion unit, 5 is an interface unit, 6-9, 18-27 Is a modem, 11-17 is a communication line, 10, 10 ', 10 "are centralized monitoring devices, 30-32 are interfaces, 33, 35, 50 are personal computers, 34 is a collecting unit, 41 is a 3-state buffer, 42 is 42 An alarm number change detection unit, 43 is a command detection unit, and 44 is a buffer.

Claims (1)

[Claims] 1. An alarm sending unit of a plurality of monitored devices (1, 2, 3) for collecting and sending an alarm from each unit is connected to a multi-drop by a serial interface, and the plurality of monitored devices (1 , 2, 3) are centralized monitoring devices (10) for collecting pulses when the number of input alarms changes.
When the pulse is input, the centralized monitoring device (10) serially sends an alarm transmission command to the monitored device that has output the pulse via the multi-drop connection unit,
The monitored device that has received the alarm transmission command issues an alarm serially via the multi-drop connection unit to the centralized monitoring device (10).
An alarm monitoring system characterized by being transmitted to.