JPH0220000A - Fire alarm facility - Google Patents

Abstract

PURPOSE:To continue fire monitoring even when disconnection occurs or a receiver fails by automatically starting polling for a terminal by a sub receiver on behalf of the receiver when the sub receiver detects that the polling stops for fixed time. CONSTITUTION:A sub receiver REs is additionally connected to the transmission line of the title fire alarm facility, and the sub receiver REs collects the addresses of respective terminals SE1-SEN from transmission signals to pass through the transmission line by the polling of a receiver RE and creates the address map of the terminals on a RAM 11. Further, the sub receiver REs monitors whether a polling operation for the terminals by the receiver RE is normally executed or not, judges that the receiver is abnormal when the polling operation is not executed for prescribed time, executes the polling for the respective terminals based on the address map created on the RAM 11, and executes monitoring and control related to a fire. Thus, it becomes possible for the sub receiver REs to monitor the terminals on behalf of the receiver when the receiver fails, and it becomes unnecessary to create a terminal map when the sub receiver REs is manufactured or installed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a device in which a terminal device such as an analog or ordinary fire detector or a repeater is connected to a receiver, and the receiver receives data from the terminal device by polling. This relates to fire alarm equipment that collects information about fires and monitors and controls them.

[Conventional technology and problems] In fire alarm equipment where terminal devices such as core analog or normal fire detectors or repeaters are connected to the receiver, the receiver is It performs polling and reads signals from them to monitor whether any abnormalities have occurred. However, if a failure occurs in the receiver's CPU or the transmission device, the entire system may go down, making it impossible to detect a fire even if it occurs.

As similar technology prior to the present invention, for example, Japanese Patent Laid-Open No. 58
-2998 is equipped with two receivers, a first and a second receiver, to which a plurality of terminals such as repeaters and sensors are connected, and these receivers sequentially connect specified terminals among the plurality of terminals. It is shown that in addition to calling and monitoring fires, if one receiver fails, the other receiver will take over the monitoring of the terminal assigned to that one receiver.

In addition, in Japanese Patent Publication No. 59-3920, each repeater monitors the condition of the receiver and the signal line between the receiver and the repeater.
When a failure occurs in the receiver or signal line, each repeater monitors the status of the fire detectors connected to each repeater, and when a fire is detected, selects and controls the controlled device. It has been shown to do so.

Such fire alarm equipment has the advantage that if a receiver fails, fire monitoring and necessary control can be continued by the other receiver in the former case, or by the repeater in the latter case. ing.

On the other hand, with the former type of equipment, it is necessary to provide a terminal address map to the re-receiver at the time of manufacture or installation, making it easy for errors to occur during manufacturing. (If you try to add another receiver to the equipment, there are problems such as having to make extensive changes to the program of one receiver and the address map of the terminal. Also, in the latter equipment, the repeater Since the repeater monitors and controls fires independently, there is a problem in that it cannot monitor and control fires in conjunction with other repeaters.

[Means for solving the problem] In the present invention, when a sub-receiver is additionally connected to the transmission line of the fire alarm equipment, and the sub-receiver detects that the receiver has failed and polling has stopped for a certain period of time, Instead of the receiver, the sub-receiver automatically starts polling terminal equipment such as analog or regular fire detectors to monitor fires.

According to a specific aspect of the present invention, terminal equipment (SE,
~5EN) is connected to a receiver (RE), and the receiver collects fire-related information from the terminal device by polling and monitors and controls the fire, the transmission to which the terminal device is connected. Sub reception fi (
REs> is connected to the sub-receiver, and the sub-receiver receives the address signal of the terminal equipment polled by the receiver.
Collection storage means (RAM 11; steps 503 to 506) that collects and stores transmission signals flowing through the transmission path; and abnormality determination means (that monitors the state of transmission signals on the transmission path and determines whether there is an abnormality in polling by the receiver). Step 50
1.502.507.508), the operation is started when a polling abnormality is determined by the abnormality determining means, and the terminal device is polled based on the address signal collected and stored in the collection storage means. Fire monitoring/
A fire alarm system is provided, characterized in that it includes polling means for performing control;

According to another specific aspect of the present invention, the polling means of the sub-receiver, prior to polling for monitoring and control regarding fire, selects the device type from each terminal device stored in the collection storage means. It is proposed to include type information collection means (steps 510 to 518) for collecting and storing information.

According to yet another specific aspect of the present invention, the polling means of the sub-receiver has an address signal stored in the collection storage means and type information stored in the type information collection means. It is proposed to poll only those terminal devices that are present (steps 520-528).

According to another specific aspect of the present invention, the sub-receiver suspends polling for a certain period of time when polling of the terminal device has elapsed for a predetermined time or a predetermined number of times, and the polling signal is passed through the transmission path. Transmission monitoring means (steps 529, 507, 508) for monitoring whether or not
) and a stop means (Y in step 501) for stopping and completing polling of its own polling means when the transmission monitoring means detects a polling signal, and the receiver has a stop means (Y in step 501) when the polling signal is detected on the transmission path. detection means (steps 301 and 302) for detecting whether or not the current is flowing; and polling of its own polling means when the detection means does not detect a polling signal for a second fixed time period shorter than the fixed time period. It is proposed to have a starting means (Y in step 301) for starting the operation.

[Function] An analog fire detector or repeater that sends the analog quantity sensor level detected by the fire phenomenon detection unit to the receiver (in this case, the receiver (to determine the presence or absence of a fire), or a terminal device such as a normal fire detector or repeater is connected to the receiver, which determines the presence or absence of a fire based on the sensor level and sends only the presence or absence of a fire to the receiver. In a fire alarm system in which a receiver collects fire signals and/or physical quantity information of fire phenomena from terminal equipment by polling, the present invention provides a system in which a sub-receiver is connected to a transmission line to which terminal equipment such as a fire detector is connected. be done.

Initially, the sub-receiver does not have an address map of the terminals, and collects the addresses of each terminal from the transmission signals flowing through the transmission path by polling the receiver, and simultaneously updates the I/O of each terminal.
It is also possible to collect D-codes and create a (address) map of the terminal on the RAM. In addition, the secondary receiver monitors whether the polling operation of the terminal by the receiver is performed normally or not, and if the polling operation is not performed for a predetermined period of time, it is determined that the receiver is abnormal and the data is created on the RAM. Monitor and control fires by polling each terminal based on the address map.

In this way, the sub-receiver automatically creates a terminal map by collecting the addresses (and even ID codes) of each terminal from the transmission signals flowing through the transmission path, so it is easy to use when manufacturing or installing the sub-receiver. There is no need to create a terminal map, and errors in creating the terminal map can be prevented.

In addition, the sub-receiver normally collects the addresses of each terminal from the transmission signals flowing through the transmission line and creates a terminal address map, and when the receiver stops polling each terminal, it follows the address map. I from each terminal
D codes (terminal identification codes or type codes) are collected to complete a terminal map, and thereafter polling is performed according to this terminal map to determine the monitoring information to be collected from each terminal.

By doing this, the primary sub-receiver can poll only the terminals whose address code and ID code are complete in the terminal map.For example, the primary sub-receiver can poll only the terminals for which the address code and ID code are complete in the terminal map. Unnecessary polling can be prevented.

In addition, the sub-receiver pauses the boring of each terminal based on the map at predetermined intervals (for example, every few polls), and if a polling signal flows through the transmission line during this pause time, the receiver recovers. It is determined that this is the case and stops polling the terminal from now on (if the ID code or type code is stored in the map, the ID code or type code may be deleted at the same time). In this case, The receiver is equipped with a monitoring means for determining whether or not a polling signal is flowing through the transmission line, that is, whether or not the sub-receiver is polling the terminal. Polling is restarted when a polling interruption (shorter than a fixed time of the receiver) is detected.

This allows polling to be switched from the sub-receiver to the receiver when the receiver recovers from a failure or the like.

[Example code] Hereinafter, specific examples of the present invention will be described.

FIG. 1 is a block circuit diagram showing an embodiment of fire alarm equipment to which the present invention is applied, and in the figure, RE is a receiver;
SE, ~SEN are sensors that are connected to the receiver RE via a pair of power and signal wires. A sub-receiver connected to the receiver RE via the receiver RE.

In the receiver RE, the MPUI is a microprocessor, the ROM1 is a program storage area, and the ROM2 is a sensor storage area that stores addresses of sensors to be connected to the receiver RE, as well as sensor types corresponding to each sensor address. Address type map storage area, ROM3 is a fire judgment criteria storage area that stores fire judgment criteria corresponding to each type, RAM1 is a work area, IFI is a transmission interface, and DPI is connected via a display interface IP2. The display section OPI is an operation section connected via the input/output interface IF3.

In addition, in the fire detector S E +, MPU2 is a microprocessor, ROM21 is a storage area for programs, and ROM22 is
RAM 21 is a work area; FS detects physical quantities in the environment such as heat and smoke related to fire phenomena; The IF22 is a transmission interface.

Furthermore, in the sub-receiver RES, MPU10 is a microprocessor, ROMII is a program storage area, and ROM12 is
This is a fire judgment criteria storage area that stores fire judgment criteria corresponding to the type, and here, as an example, the content can be the same as the content of the storage area ROM3 in the receiver RE.

RAM11 is a storage area for storing a sensor address map, RAM12 is a type data storage area for storing types corresponding to each of the sensor addresses stored in storage area RAMII, and RAM13 is a work area. , IFII is a transmission interface, DPII is a fire display unit connected via the interface IF12, and pH is an operation unit connected via the interface IF13.

The operation of the configuration shown in Fig. 1 above is explained in Figs. 2, 3, and 4A.
This will be explained with reference to FIGS. 4C to 4C. FIG. 2 is a flowchart I for explaining the operation of receiver RE, and FIG. 3 is flowchart I for explaining the operation of receiver RE, and FIG. 3 is flowchart I for explaining the operation of receiver RE.

This is a flowchart for explaining the operation.

FIGS. 4A to 4C are flowcharts for explaining the operation of the sub-receiver REs.

First, in FIG. 2, before the receiver RE restarts for the first time or when recovering from a failure, it checks whether there is a polling issued from another station on the signal line, that is, from the sub-receiver REs. If there is polling on the signal line (Y in step 301), a time wait is performed (step 302).

Each time one cycle of the polling operation ends, the secondary receiver REs operates for a certain period of time, that is, the limited time Q for determining receiver recovery (recovery), in order to transfer the operation to the receiver RE that has recovered from the failure. However, if the receiver RE detects that the sub-receiver RES enters its operation stop period and there is no polling on the signal line (N in step 301), it starts receiving on behalf of the sub-receiver RES. The machine RE starts polling operation. That is, first, in steps 303 and 304, n (1≦n≦N) is set to 1, and thereby N fire detectors are polled in order starting from the first one.

In the polling operation for the No. 1 sensor, that is, the n-th fire detector SEn, a data return command is sent to the No. 1 sensor (Step 305), and if there is a return (Y in Step 306), the data return command is sent to the No. 1 sensor (Step 305). Read the sensor data, that is, the sensor level detected by the fire phenomenon detection unit FS of the No. 0 sensor and send it back to S.
Store it in the work area RAM1 as LV (step 30
7).

Next, the type corresponding to the 0th senna is read from the senna address type map storage area ROM2, and the storage area R stores fire discrimination criteria for each sensor type.
Load the fire discrimination criteria corresponding to the type from OM3,
The read fire discrimination standard is compared with the sensor data of the No. 1 sensor stored in the work area RAM1 (step 308), and if the two match (Y in step 308), the data is displayed. After the fire is displayed on the DPI (step 309), if they do not match (N in step 308), the process directly goes to step 310 to poll the next sensor.

As shown in FIG. 3, each fire detector first determines whether or not there is a signal on the transmission line, that is, the signal mL, and if there is a signal (Y in step 401), the signal on the signal line is transmitted. Read (step 4o2), whether it is for self or not, i.e. the address in the signal is in the storage area ROM2
2 (step 403).
If it matches the address (Y in step 403), it is determined whether the signal is a data return command (step 4o4) or a type information return command (step 4o7).

If the signal is a data return command (step 404
Y), reads the sensor data or sensor level from the fire phenomenon detection unit FS and stores it in the work area RAM 21 as SLY (Step 405), and sends the sensor level SLV and self address to the transmission interface I F22. It is written and transmitted on the signal line (step 406).

After transmitting onto the signal line, in step 401 it waits for the next signal to be received.

If the signal is a type information return command from the sub-receiver RES, which will be described later in FIGS. 4A to 4C (step 40
7 Y), reads the type information from the storage area ROM 22 and stores it as an ID in the work area RAM 21 (step 408), and writes the type information ID and self address to the transmission interface IF 22 and writes it on the signal line. After transmitting on the signal line (step 409), the process waits for the next signal to be received in step 401.

Finally, based on FIGS. 4A to 4C, the secondary receiver REs
Explain the operation. During normal operation, the receiver RE and the fire detectors SE, -SE exchange data over a transmission line or signal line in the manner described in FIGS. 2 and 3, respectively. In the sub-receiver RES, which is also connected to the transmission line L and becomes effective when the receiver RE fails or the transmission line is disconnected, first, as shown in Fig. 4A, It is constantly monitored to see if the signal is continuously interrupted for a predetermined period of time, that is, the time limit P for determining receiver failure (
Step 501) If the signal is received at any time within the time limit P without being interrupted continuously during the time limit P (Y in step 501), this means that the receiver RE is operating normally. Therefore, the count value C0UNT for the transmission line monitoring timer is set to a predetermined number P, and the contents of the storage area RAM 12 are cleared (
Step 502) Read the data on the transmission line L and store it in the work area RAM 13 as DAT^ (Step 503) Next, check whether this data DAT is data sent by a terminal device, that is, a fire detector. That is, it is determined whether the data returned is a command sent from the receiver RE, or whether it is the returned data sent from the fire detector in accordance with the data return command, that is, sensor data of the fire phenomenon detection unit FS. (Step 504), and if it is not the return data sent out by the fire detector (N in Step 504), Step 501
Waits for the next signal on transmission line L.

If the return data is sent out by a fire detector (Y in step 504), it is determined whether the address of this fire detector is already registered in the sensor address map storage area RAM 11; If it has not been registered yet (N in step 505), the address of this fire detector is registered in the storage area RAM 11 (step 506), and the next signal is waited for in step 501.

In this way, a sensor address map is created in the storage area RAMII based on the data returned from the fire detector. Only the address of the terminal device is known, and the effort of preparing such a sensor address map in advance in the sub-receiver RES can be saved.

If there is no signal on the transmission line L (step 501
N), the value of the count value C0UNT set to the predetermined number P is decremented by one at each predetermined time interval (step 508), and the signal on the transmission line L is decreased until the count value C0UNT becomes 0. If not detected (step 50)
7Y), it is determined that some kind of trouble has occurred in the receiver RE, and the sub-receiver REs enters a step to perform a fire monitoring operation in place of the receiver RE.

First, as shown in FIG. 4B, type data storage area RA
It is determined whether type data is stored in M12 (step 510), but since the storage area RAM12 has been cleared in step 502, type data is not stored at this point (step 510). N) Therefore, prior to the normal polling operation for fire monitoring by the sub-receiver REs, a step is taken to collect type data from each fire detector in the storage area RAM 12.

That is, in step 511, the first address of the address map stored in the storage area RAMII is set as AD.
), reads the content of the first address, that is, the first sensor address stored in the RAM 12, and converts it to 5.
EAD (step 512), then attach a type information return instruction code to the 5EAD and send it to the interface IF.
Send it on the transmission line L by writing to II (
Step 513).

The type information return command is received in step 407 at the fire detector at the corresponding address as described above, and the sensor address and type information are returned in steps 408 and 409, so that the returned information is received within a predetermined time. is received by the interface IF11 of the sub-receiver RES (Y in step 514), the interface I
Read from F11 into the sub-receiver RES and store it in the storage area RA.
The sensor address and type information are stored in the corresponding position of M12 (step 515).

If the returned data is not received by the interface IFII even after a predetermined period of time has elapsed (Y in step 516)
, the sensor is considered unconnected due to failure or disconnection.
The type information for the sensor is not stored in the storage area RAM 12.

The type information is returned within a predetermined time and stored in the storage area RAM 12.
address AD is incremented by 1 after the address is stored in , or after a predetermined period of time has elapsed without any return (Stella 7517).
, if the address AD is not the final address (N in step 518), type information from the next sensor is collected in the same way.

In this way, among the sensors of each sensor address stored in the storage area RAMII, the sub receiver R is currently
Type information is collected from those connected to the ES and stored in the storage area RAM 12.

Once the type information is collected in the storage area RAM 12 for the sensor address stored in the storage area RAM II (Y in step 518), next,
An action is taken to perform fire monitoring on the sensors, that is, fire detectors stored in the storage area RAM12.

First, the first address of the type data storage area RAM 12 is set as AD (step 52o), the contents of the address AD are read and set as sensor address 5EAD and sensor type 5ECL (step 521), and then the sensor address 5EAD is read. It is written to IFI 1 with a data return command code and sent onto transmission line L (step 522).

When the sent data return command code is received by the fire detector at the sensor address 5EAD as described above,
In steps 404 to 406, the sensor level SLV of the fire phenomenon detection unit FS and the sensor address are returned, so when receiving the returned information,
), read the sensor level from the interface IFII and use it as SLV, 0th order, sensor type 5ECL
The fire discrimination standard corresponding to the above is read from the storage area ROM11, and it is determined whether the sensor level SLV matches the fire discrimination criterion (step 525). After displaying the fire indication on the section DPII, if they do not match again (step 52
5N), go directly to step 527, and enter the address A.
D is incremented by one and the same fire monitoring operation is performed for the sensor stored at the next address in the storage area RAM 12.

When the polling operation is performed for all the sensors stored in the storage area RAM 12 in this way, the receiver An idle period of 0 hours is taken to determine whether the RE has recovered from the failure. That is, first,
A watchdog timer C0UNT is set to Q (step 52).
9), Step 508) in which the count value of the timer is decremented by 1 at every predetermined time, if no signal comes on the transmission line L before the count value of the timer is decremented to 0 ( (N in step 501 and Y in 507), this means that the receiver RE has not been recovered yet. Therefore, in order to continue further polling operations by the sub-receiver RES, the type information is first stored in the storage area RAM 12 in step 510. Check whether it is stored. At this point, the type information is stored in the storage area RAM 12 (Y in step 510), so the polling operation from step 520 will be performed again.

If the determination in step 501 is “Yes”, that is, “Y
”, it means that the receiver RE has recovered, so the timer C0UNT is set to P, the storage area RAM 12 is cleared, and the secondary receiver RES returns to the standby state described in steps 503 to 506. .

In addition, if the terminal polled by the receiver or sub-receiver sends fire-related information such as sensor level or type information without attaching its own address signal, the sub-receiver will: Address signals of terminals may be collected using address signals sent from a receiver to a transmission path.

[Effects of the Invention] As described above, according to the present invention, when a sub-receiver is additionally connected to the transmission line of the fire alarm equipment and the sub-receiver detects that polling by the receiver has stopped for a certain period of time, Since the sub-receiver instead of the receiver automatically starts polling the terminal equipment, there is an effect that fire monitoring can continue normally even in the event of wire breakage or receiver failure. In addition, when a secondary receiver is installed locally, the secondary receiver can read sensor data from the receiver through polling, so the fire detection function of the secondary receiver can function even when the receiver is normal. This has the advantage that fire monitoring can be carried out locally.

Furthermore, since the sub-receiver automatically creates the address map of the terminal by collecting address signals flowing through the transmission path, it is possible to eliminate manufacturing errors in the address map of the terminal when manufacturing the sub-receiver. This has the advantage that it is possible to easily add a sub-receiver to existing equipment.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of fire alarm equipment to which the present invention is applied, FIG. 2 is a flowchart for explaining the operation of the receiver RE shown in FIG. 1, and FIG. 1
FIGS. 4A to 4C are flowcharts for explaining the operation of the fire detector in FIG. 1. In FIG. 0, RE is the receiver; SE, ~SEN are terminal devices such as multiple analog or ordinary digital fire detectors, RES is a sub-receiver, MPU1 is a microprocessor,
ROM1 is the program storage area, ROM2 is the sensor
Address type map storage area, ROM3 is fire judgment criteria storage area, RAM1 is work area, DPI is display section, MP
U2 is a microprocessor, ROM21 is a program storage area, ROM22 is an address type information storage area, R
AM21 is the work area, FS is the fire phenomenon detection unit, MPU1
0 is the microprocessor, ROMII is the program storage area, ROM12 is the fire judgment criteria storage area, RAMI
I is a sensor address map storage area, RAM12 is a type data storage area, RAM13 is a work area, DPll
is the fire indicator.

Claims (4)

[Claims] (1) Terminal devices such as analog or regular fire detectors and repeaters are connected to a receiver, and the receiver collects information about fires from the terminal devices by polling and monitors and controls fires. In the fire alarm equipment, a sub-receiver is connected to a transmission path to which the terminal device is connected, and the sub-receiver receives an address signal of the terminal device polled by the receiver, and transmits the address signal of the terminal device polled by the receiver to the transmission path flowing through the transmission path. a collection storage means for collecting and storing signals; an abnormality determining means for monitoring a transmission signal state of the transmission line and determining a polling abnormality by the receiver; and when the abnormality determining means determines a polling abnormality. A fire alarm system comprising: polling means that starts operation and polls the terminal equipment based on the address signals collected and stored in the collection storage means to monitor and control fires. . (2) The polling means of the sub-receiver is a type information collection means for collecting and storing equipment type information from each terminal device stored in the collection storage means prior to polling for fire monitoring and control. The fire alarm equipment according to claim 1, which has the following. (3) A patent in which the polling means of the sub-receiver polls only terminal devices whose address signals are stored in the collection storage means and whose type information is stored in the type information collection means. Fire alarm equipment according to claim 2. (4) the sub-receiver suspends polling for a certain period of time when polling of the terminal device has elapsed for a predetermined time or a predetermined number of times, and monitors whether or not a polling signal flows through the transmission path; and stop means for stopping and completing polling of its own polling means when the transmission monitoring means detects a polling signal, and the receiver has a detection means for detecting whether or not a polling signal is flowing through the transmission path. and a starting means for starting the polling operation of its own polling means when the detection means does not detect a polling signal for a second fixed time shorter than the fixed time. Fire alarm equipment according to any one of paragraphs 1 to 3.