JP2001307267A - Automatic fire alarm system of distributed process type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an amount of memory in a local device by reducing a fire determination level to be controlled by the local device. SOLUTION: A center device 1 is provided with means 1A and 1B to divide fire determination level information of fire detectors S connected to a local device 2 into the one before modification and the one after modification, and to register them in every local device 2. The local device 2 is provided with a means 2B to register the fire determination level information of fire detectors S connected to the local device 2. When fire determination level information to be registered in the center device 1 is modified, the center device 1 transmits the fire determination level information after modification to the local device 2 as well as registers the modified fire determination level information as the one after modification, while the fire determination level information registered as the one after modification is transferred to the one before modification. The local device 2 registers this information by overwrite when it received the fire determination level information after modification from the center device 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a distributed processing type automatic fire alarm system configured by connecting a center device and local devices, each of which performs distributed processing.

[0002]

2. Description of the Related Art In recent years, distributed processing type automatic fire alarm systems have become widespread in large-scale buildings such as apartment houses and buildings. In this device, a center device and local devices, each of which performs distributed processing described later, are connected via a multiplex transmission line, and the center device and the local device perform polling via the multiplex transmission line. This monitors the fire detector connected to the local device.

[0003] The center device and the local device have means for registering fire judgment level information based on the detection output from the fire detector. As shown in FIG.
Tables 100A and 100B are provided for dividing and registering the judgment level information before and after the change.
Similarly to the center device, there are provided tables 200A and 200B in which the judgment level information is divided and registered before and after the change.

In such a distributed processing type automatic fire alarm system, each local device monitors a fire detector connected to the local device by cyclically accessing it.
Monitor the occurrence of fire by receiving the sensing output from each sensor,
This local device performs a so-called distributed process of determining a fire alarm level from the sensor output from each sensor with reference to the table 200B and outputting a fire alarm according to the determined fire alarm level.

[0005]

By the way, in such a distributed processing type automatic fire alarm system, the center device is:
The fire determination level information registered in each local device is managed in the tables 100A and 100B described above.
When the content of the table 100B is changed, the registered content of each local device is also changed accordingly, and when the change operation is canceled, the information before the change is restored, and the information before the change of each local device is restored accordingly. ing.

More specifically, referring to FIG. 4, when the registered contents are changed by the center device, the registered contents of table 100B are rewritten, and the contents of table 100B are rewritten.
Are registered in the table 100A. At this time, the center device transmits the contents after the change to the local device, and the local device having received the content changes the table 200.
B is replaced with the received content, and the table 200B
Is registered in the table 200A.

On the other hand, after the registration contents are changed, the table 100
When the change of the registered contents of B is released, the center device overwrites and registers the registered contents of table 100A in table 100B and sends a change release signal to the local device.
The registered content of 0B is deleted and rewritten with the content of the table 200A.

As described above, in the conventional distributed automatic fire alarm system, the fire judgment level information registered in each of the center device and the local device is returned to the information before the change even when the information is changed. Information before and after the change is managed twice,
It was necessary to secure a large memory capacity for registering such information.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an automatic fire alarm system capable of reducing the memory capacity of a local device by reducing the fire determination level to be managed by the local device. It is intended to provide.

[0010]

In order to achieve the above object, in the distributed processing type automatic fire alarm system according to the first aspect of the present invention, the center device is connected to the local device for each local device. Means for dividing and registering the fire determination level information of the fire detector to be divided before and after the change, wherein the local device registers the fire determination level information of the fire detector connected to the local device. When the fire judgment level information registered in the center device is changed, the center device sets the fire judgment level information registered as after the change as the fire judgment level information before the change, while changing the fire judgment level information before the change. The changed fire judgment level information is registered as the changed fire judgment level information, and the changed fire judgment level information is transmitted to the local device. Upon receiving the fire determination level information after the change from the motor unit overwrites registers it.

[0011] In the distributed processing type automatic fire alarm system according to the second aspect, the local device determines the fire alarm level of the fire detector based on the fire judgment level information registered in the local device.

In the distributed processing type automatic fire alarm system according to the third aspect, after the fire judgment level information registered in the center device and the local device is changed, when the change is canceled in the center device, the change is made. The fire judgment level information registered as “before change” is deleted, the fire judgment level information registered as “before change” is set as the fire judgment level after change, and the fire judgment level information registered as “before change” is also used as the local device. When the local device receives the fire determination level information before the change from the center device, the local device overwrites the fire determination level information with the fire determination level information registered as after the change.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a main configuration of a distributed processing type automatic fire alarm system according to the present invention.

In this apparatus, a center device 1 and a local device 2 each performing a distributed process, which will be described later, are connected via a multiplex transmission line L, and the center device 1 and the local device 2 are multiplexed. By performing polling via the transmission line L, the fire detector S connected to the local device 2 is monitored.

The center device 1 and the local device 2 have means for registering fire judgment level information based on the detection output from the fire detector S. As shown in FIG. In addition, there are provided tables 1A and 1B in which fire judgment level information is divided and registered before and after the change, and the local device 2 is provided with a table 2B in which judgment level information is registered.

In such a distributed processing type automatic fire alarm system, each local device 2 monitors the fire detector S connected thereto by accessing it cyclically, and outputs a detection output from each detector S. The local unit 2 monitors the occurrence of a fire in response to the fire alarm, determines the fire alarm level from the sensing output from each sensor S with reference to the table 2B, and outputs a fire alarm according to the determined fire alarm level. That is, so-called distributed processing is performed.

In such a distributed processing type automatic fire alarm system, the center apparatus 1 stores the fire judgment level information registered in each local apparatus 2 in the tables 1A and 1B described above.
If you change the contents of table 1B,
Accordingly, the registration contents of each local device 2 are also changed,
When the change operation is released, the information before the change is restored, and the information before the change is also restored in each of the local devices 2.

That is, with reference to FIG. 2, when the registered contents are changed by the center device 1, the registered contents of the table 1B are rewritten, and the original registered contents of the table 1B are registered in the table 1A. At this time, the center device 1 transmits the content after the change to the local device 2, and the local device 2 receiving the content rewrites the content of the table 2B with the received content.

On the other hand, when the change of the registered contents of the table 1B is canceled after the change of the registered contents, the center device 1
The registered contents of the table 1B are deleted, and the registered contents of the table 1A are rewritten to the table 1B. Then, the center device 1 sends the registered contents of the table 1A to the local device 2, and upon receiving this, the local device 2 rewrites the registered contents of the table 2B with the registered contents received from the center device 1.

As a result, the memory capacity to be secured in the local device 2 is conventionally 256 (the number of fire detectors S).
X 3 levels (caution, fire, interlocking) x 2 bytes (capacity of fire judgment level information) x 2 (before change, after change) = 3072
In the present invention, the number of bytes is 1536 bytes, which is half of the number in the present invention, so that the memory capacity of the local device 2 can be reduced.

[0021]

As can be understood from the above description, in the distributed processing type automatic fire alarm system according to the first aspect of the present invention, when the fire judgment level information registered in the center device is changed, the center device is changed. Is the fire determination level information registered as after the change as the fire determination level information before the change, while the changed fire determination level information,
Register as the fire judgment level information after the change,
Send the changed fire judgment level information to the local device,
When the local device receives the changed fire determination level information from the center device, the local device is configured to overwrite and register the changed fire determination level information. It is not necessary to secure a large memory capacity for registering such information so that the information before and after the change is managed twice, and by reducing the fire judgment level to be managed by the local device, The memory capacity can be reduced.

[0022] In the distributed processing type automatic fire alarm system according to the second aspect, the local device determines the fire alarm level based on the fire judgment level information registered in the local device. During the processing, it is possible to output a fire alarm according to the detection output level from the fire detector.

In the distributed processing type automatic fire alarm system according to the third aspect, after the fire judgment level information registered in the center device and the local device is changed, when the change is released in the center device, the change is made. The fire judgment level information registered as “before change” is deleted, the fire judgment level information registered as “before change” is set as the fire judgment level after change, and the fire judgment level information registered as “before change” is also used as the local device. When the local device receives the fire judgment level information before the change from the center device, the local device is configured to overwrite and register the fire judgment level information registered as the changed fire judgment level information. The local device can respond to a change release request without having to register the information before the change.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a main configuration of a distributed processing type automatic fire alarm system of the present invention.

FIG. 2 is a diagram for describing change or cancellation of change of fire determination level information.

FIG. 3 is a diagram showing a fire determination level information registration unit of a conventional distributed processing type automatic fire alarm system.

FIG. 4 is a diagram for explaining change or cancellation of change of fire determination level information in a conventional distributed processing type automatic fire alarm system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Center apparatus 2 ... Local apparatus 1A ... Fire judgment level information registration table before change 1B ... Fire judgment level information registration table after change 2B ... Fire judgment level information registration table after change ..Fire detectors

Claims (3)

[Claims] 1. A distributed processing system comprising a center device and local devices each performing a distributed process, wherein the center device centrally manages fire determination level information of a fire detector connected to the local device. Means for automatically registering, for each of the local devices, fire judgment level information of a fire detector connected to the local device, before and after the change, for each of the local devices. The local device has means for registering fire determination level information of a fire detector connected to the local device. When the fire determination level information registered in the center device is changed, The device uses the fire determination level information registered as after the change as the fire determination level information before the change, and the changed fire determination level information as
Register as the fire judgment level information after the change,
A distributed processing type automatic fire alarm in which the changed fire judgment level information is transmitted to the local device, and the local device overwrites and registers the changed fire judgment level information when receiving the changed fire judgment level information from the center device. system. 2. The distributed processing method according to claim 1, wherein the local device determines a fire alarm level of the fire detector based on fire determination level information registered in the local device. Automatic fire alarm system. 3. The method according to claim 1, wherein after the fire determination level information registered in the center device and the local device is changed, when the change is released in the center device, the change is regarded as after the change. The registered fire judgment level information is deleted, the fire judgment level information registered as before the change is set as the changed fire judgment level, and the fire judgment level information registered as before the change is also used as the local device. When the local device receives the fire determination level information before the change from the center device, the local device overwrites and registers the fire determination level information on the fire determination level information registered as after the change. Distributed processing type automatic fire alarm system.