JP2687908B2 - Alarm notification method and system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm notification method and system, and more particularly to an alarm notification method and system between a center device and a plurality of local devices connected via a common line.

[0002]

2. Description of the Related Art Conventionally, as a method of notifying an alarm between a center device and a plurality of local devices connected via a common line such as a multi-drop line, the center device individually polls each local device. By performing the selecting, the alarm from each local device is notified to the center device. This means that the center device sends a selecting signal to any one of the local devices, and in response to that, the local device sends an alarm back to the center device. By sending a signal, the alarm generated in each local device is notified to the center device.

[0003]

Therefore, in such a conventional alarm notification method, when the number of local devices connected to a common line increases, the polling cycle for one local device becomes long, and therefore the local alarm notification method becomes long. The notification of the alarm information generated by the device is always delayed until the next polling cycle, which causes a problem that the display of the alarm generation by the center device is delayed. The present invention is for solving such a problem, and an alarm notification method capable of shortening the delay time of alarm notification even in a system in which a plurality of local devices are connected by a common line, and The purpose is to provide a system.

[0004]

In order to achieve such an object, in the alarm notification method according to the present invention, the center device accommodates each local device in series via a common line, and each local device is accommodated. A buffer for other stations to capture alarm information of other stations from other local devices is provided, and when alarm information of other stations is input, other stations are notified if the alarm information of their own station is sent. When the alarm information is sent to the center device side and the local station alarm information is being sent, the other station alarm information is temporarily fetched in the other station buffer and added after the local station alarm information and sent.
When an alarm occurs in your own station, if other station alarm information is not input, sending of your own station alarm information starts to the center device side, and if other station alarm information is input, another station alarm information After sending the information, the local station alarm information is sent. Further, the other station buffer has a capacity determined by the product of the number of alarms that one local device can transmit with one alarm information and the number of local devices accommodated in the center device.

Further, in the alarm notification system according to the present invention, the center device accommodates each local device in series through a common line, and each local device is connected to another local device on the opposite side of the center device. Selects the other station buffer that captures the station alarm information, the own station buffer that captures the alarm generated in the own station as the own station alarm information, the other station alarm information in the other station buffer, or the own station alarm information in the own station buffer. It is equipped with a transmission buffer to be taken into the device and a filter that selectively sends other station alarm information from another local device on the opposite side of the center device or alarm information in the transmission buffer to the center device side. The other station's alarm information from other local equipment is branched and input to the filter and other station buffer. When information is input, if other station alarm information is not being sent, other station alarm information is sent.If own station alarm information is being sent, other station alarm information is blocked, and alarm information is captured in the send buffer. If the alarm information of other station is not sent, the alarm information in the send buffer is sent, and if the alarm information of another station is being sent, the alarm information in the send buffer is sent after sending the alarm information of the other station. When the alarm information of another station is input to the buffer of another station while outputting the alarm information of the own station fetched from the buffer of the own station, the transmission buffer adds the alarm information of the other station after the alarm information of the own station. And output it.

[0006]

[Operation] Therefore, when the alarm information of another station is input, the alarm information of another station is sent to the center device side when the alarm information of the own station is not being sent, and the alarm of the other station is sent when the alarm information of the own station is being sent. When the information is temporarily stored in the buffer of another station, added and sent after the alarm information of its own station, and an alarm occurs at its own station, or if the alarm information of another station is not input, the own station alarm is sent to the center device side. When the information transmission is started and the other station alarm information is input, the local station alarm information is transmitted after the other station alarm information is transmitted.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an alarm notification system according to an embodiment of the present invention, and particularly shows essential parts relating to alarm information transmitted from a local device to a center device.
In the figure, 11 to 1n are local devices that send out alarm information in response to the occurrence of an alarm of their own station, and 9 is a device that receives alarm information from each of the local devices 11 to 1n and outputs an alarm output based on the alarm information. The center devices 7 and 8 are lines for connecting the local devices 11 to 1n and the local device 11 and the center device 9.

In the local devices 11 to 1n, 1 is a local buffer for fetching alarm information in response to occurrence of the local alarm b, and 2 is other station alarm information a from another local device on the opposite side of the center device 9. Is a buffer for other stations that temporarily captures the alarm information, and 3 is a transmission buffer that selectively captures the alarm information in the local station buffer 1 or the buffer for other stations 2,
Reference numeral 4 is a filter that directly sends the other station alarm information a when the alarm information is not being sent from the sending buffer 3, and shuts off the other station alarm when sending the alarm information in the sending buffer 3, and c is sent to the center device 9 side. It is the generated alarm information.

The other station alarm information a from the line 7 is input to the filter 4 and the other station buffer 2. Normally, the filter 4 directly transmits the other station alarm information a, and the other station alarm information a is sent to the line 8 via the filter 4. The other station alarm information a stored in the other station buffer 2 is periodically cleared. Own station alarm b
When the other station alarm information a is not stored in the other station buffer 2, the other station alarm information a is determined not to be received and transmitted, and the own station alarm information is transmitted to the other station buffer 3 And is sent to the line 8 via the filter 4.

Next, with reference to FIG. 2, an alarm information sending process will be described as an operation of the present invention by taking the local device 1n as an example. FIG. 2 is a flowchart showing an alarm information sending process in the local device. First, in step 20, it is judged whether or not the own station alarm b is generated, and if the own station alarm b is generated (step 20: YE
In S), the presence or absence of other station alarm information a is determined in step 21.

Whether or not the other station alarm information a is present is determined by whether or not the other station alarm information a is stored in the other station buffer 2. FIG. 3 is a timing chart showing a case where the own station alarm b and the other station alarm information a occur at independent times. In FIG. 3, 31 is the own station alarm and 32 is the line 8 according to the own station alarm 31. The local station alarm information transmitted to the line 7, 33 is the remote station alarm information input from the line 7, and 34 is the remote station alarm information transmitted to the line 8 according to the remote station alarm information 33.

In step 21 of FIG. 2, if there is no other station alarm information as shown in FIG. 3 (step 2
1: NO), in step 22, transmission of the local station alarm information 32 in the local station buffer 1 is started, and is transmitted to the line 8 via the transmission buffer 3 and the filter 4. Therefore, when there is no other-station alarm information, the own-station alarm information is immediately transmitted in response to the occurrence of the own-station alarm and is transferred to the center apparatus 9 via each local apparatus on the side of the center apparatus 9, The alarm is notified more quickly without waiting for the selecting signal from the center device 9.

Further, in step 21, when the input of the alarm information of the other station is detected (step 21: YE
In S), as will be described later, the detected other station alarm information is preferentially transmitted to the center device 9. The other station buffer 2 is periodically cleared to erase the other station alarm information sent via the filter 4. Therefore, in step 21, if it is determined whether or not the other station alarm information is stored in the other station buffer information 2 by the presence or absence of the other station alarm information, the presence or absence of the other station alarm information continues for a period longer than the period when the other station buffer is cleared. It is determined based on whether or not it is detected.

After the start of the transmission of the own station alarm information 32, the end of the transmission of the own station alarm information 32 in step 23 is monitored, and the process returns to step 20 in response to the end of the transmission (step 23: YES). Next, in step 20, own station alarm b
3 is not detected (step 20: NO), the presence or absence of the other station alarm information a is confirmed in step 27, and
When the other station alarm information 33 is detected as shown in a (step 27: YES), the transmission of the other station alarm information 34 is started via the filter 4 in step 28.

As a result, the other-station alarm information 33 from the line 7 is transferred as the other-station alarm information 34 directly to the line 8 via the filter 4. In step 29, the transmission end of the other station alarm information 34 is detected, and in response to the transmission end (step 29: YES), the process returns to step 20. In this way, since the information is directly transferred to the center device 9 in response to the input of the other-station alarm information a, the alarm information from the upstream side is quickly transferred to the center device 9 via each local device. Become.

FIG. 4 is a timing chart showing a case where the other station alarm information is input during the transmission of the own station alarm information. In step 24 of FIG. 2, when the input of the other station alarm information 33 is detected during the transmission of the own station alarm information 32 (step 24: YES), the end of transmission of the own station alarm information 32 is detected in step 25. To be done. At this time, the other station alarm information 33 input from the line 7 is blocked from being transmitted to the line 8 by the filter 4, and the other station alarm information 33 is stored in the other station buffer 2.

Subsequently, after the transmission of the own station alarm information 32 is completed (step 25: YES), the other station alarm information 33 is fetched from the other station buffer 2 into the transmission buffer 3 in step 26, and is stored as the other station alarm information 34. It is added immediately after the local station alarm information 32 and transmitted to the line 8. After transmitting the other-station alarm information 34, the process returns to step 20. In this way, when the other station alarm information 33 is input during the transmission of the own station alarm information 32, the other station alarm information 33 is input to the other station buffer 2
Since the alarm information 32 is temporarily stored in and is transmitted after being added to the own station alarm information 32, the other station alarm information 33 can be quickly transferred without both alarm information colliding.

FIG. 5 is a timing chart showing a case where an own station alarm is generated while transmitting the other station alarm information. Other station alarm information 34 is obtained in step 28 of FIG.
If the local station alarm 31 is generated before the start of the transmission of the alarm and the end of the transmission is detected in Step 29, the completion of the transmission of the other station alarm information 34 is confirmed in Step 29 (Step 29). : YES), step 2
After returning to 0, the own station alarm 31 is confirmed in step 20, and it is confirmed that there is no new other station alarm information in step 21 as described above, and then the own station alarm information 32 is transmitted in step 22. Is started.

In the above description, the case where the other station buffer 2 is periodically cleared has been described, but the case where the other station alarm information is directly transmitted through the filter 4 and the other station buffer 2 are used. When the other station alarm information is transmitted via the transmission buffer 4, the corresponding other station alarm information in the other station buffer 2 may be immediately deleted. In this case, in step 21, the other station alarm information is deleted. When confirming the presence or absence of the above, the above-mentioned predetermined period is not required.

As the maximum storage capacity of the other station buffer 2 of each of the local devices 11 to 1n, the product of the number of alarms that one local device can transmit with one alarm information and the number of local devices accommodated in the center device. By setting the capacity obtained in step 1, even when a plurality of types of alarm information are transmitted from one local device at a time, it is possible to reliably transfer the alarm information of other stations to the center device without loss. Since the number of local devices connected to the side opposite to the center device 9 varies depending on the position where the local devices are connected in series, the number of alarms that one local device can transmit in one alarm information and the number of center devices. The capacity may be the product of the number of local devices connected to the opposite side of the device.

[0021]

As described above, according to the present invention, each local device is accommodated in series via the line common to the center device, and each local device receives the other station alarm information from another local device. If a station buffer is provided and other station alarm information is input, if other station alarm information is not being sent, the other station alarm information is sent to the center device side, and if the own station alarm information is being sent, the other station is sent. Alarm information is temporarily fetched in another station's buffer and added after its own station's alarm information to be sent out, so that alarm information from each local device can be quickly transferred to the center device via other local devices. If the local station alarm information is being sent, the local station alarm information will be sent after the other station alarm information is added, and both alarm information will collide. Rukoto without and becomes the other station alarm information is rapidly transferred.

When an alarm occurs in the own station, when the other station alarm information is not input, the sending of the own station alarm information to the center device side is started, and the other station alarm information is input. Since the local station alarm information is sent to the local station after the local station alarm information is sent to the local station, if the local station alarm information does not exist, the local station alarm information is immediately sent according to the occurrence of the local station alarm, and each local station It will be quickly transferred to the center device through the device,
There is no delay caused by waiting for reception of the selecting signal from the center device as in the conventional case. Further, since the buffer for another station has a capacity determined by the product of the number of alarms that one local device can transmit with one alarm information and the number of local devices accommodated in the center device, the alarm information of another station is provided. Can be reliably transferred to the center device without loss.

[Brief description of the drawings]

FIG. 1 is a block diagram of an alarm notification system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an alarm information transmission process in a local device.

FIG. 3 is a timing chart when an own station alarm and another station alarm information are independently generated.

FIG. 4 is a timing chart when other station alarm information is input during transmission of own station alarm information.

FIG. 5 is a timing chart in the case where an own station alarm occurs while transmitting another station alarm information.

[Description of Codes] 1 ... Own station buffer, 2 ... Other station buffer, 3 ... Transmission buffer, 4 ... Filter, 7 lines (opposite side of center device), 8 ... Line (center device side), 9 ... Center device 11 to 1n ... Local devices.

Claims (3)

(57) [Claims] 1. An alarm notification system in which a center device and a plurality of local devices are connected via a common line, and an alarm generated by each local device is notified to the center device via the line, the center device comprises: Each local device is accommodated in series via a common line, and each local device is provided with a buffer for other stations that receives the alarm information of other stations from other local devices. Notifying the alarm that occurred in 1. If the local station alarm information is not being sent, the other station alarm information is sent to the center device side, and if the own station alarm information is being sent, the other station alarm information is sent to the other station buffer. Once captured, it is added after the local station alarm information and sent out. If an alarm occurs at the local station, and if no other station alarm information is input, the An alarm characterized in that it starts transmitting the local station alarm information to the input device side, and if the other station alarm information is input, the local station alarm information is transmitted after the other station alarm information is transmitted. Notification method. 2. The alarm notification method according to claim 1, wherein the other station buffer is obtained by multiplying the number of alarms that one local device can transmit with one alarm information by the number of local devices accommodated in the center device. A method of notifying an alarm characterized by having a capacity to be provided. 3. An alarm notification system in which a center device and a plurality of local devices are connected via a common line, and an alarm generated in each local device is notified to the center device via the line, the center device comprises: Accommodating each local device in series via a common line, each local device receives another station's alarm information from another local device on the opposite side of the center device, and an alarm generated in its own station. Is used as the local station alarm information, a local buffer that selectively captures the local station alarm information in the local station buffer or the local station alarm information in the local station buffer, and the other local side on the opposite side of the center unit. It is equipped with a filter that selectively sends the other station alarm information from the equipment or the alarm information in the transmission buffer to the center equipment side. The other station alarm information from another local device on the opposite side of the input device is branched and input to the filter and other station buffer. The filter is used when the other station alarm information is input and when the local station alarm information is not being sent. Indicates that the other station alarm information has been transmitted, the other station alarm information has been cut off if the local station alarm information is being transmitted, the alarm information has been captured in the transmission buffer, and the other station alarm information has not been transmitted. The alarm information in the send buffer is sent to, the alarm information in the send buffer is sent after the other station's alarm information has been sent, and the send buffer is loaded from its own buffer. If other station alarm information is input to the other station buffer while outputting the own station alarm information, the other station alarm information is added after the own station alarm information. Alarm notification system being characterized in that so as to output the added broadcast.