Fire alarm systems, control devices and terminals

Abstract

To provide a fire notification system, a control device, and a terminal for preventing a plurality of terminals from transmitting data at the same time.SOLUTION: A control device 1 is a control device of a fire notification system S that receives status information indicating the status of a plurality of terminals 2 from the plurality of terminals 2. The control device 1 has a status information receiving unit 132 that receives status information during a period for registered terminals in which one or more registered terminals can transmit the status information; a registration request receiving unit 133 that receives a registration request from an unregistered terminal during a period for unregistered terminals different from the period for registered terminals, a determination unit 134 that determines whether or not the unregistered terminal that transmits the registration request can be registered when receiving the registration request, and a notification transmitting unit 135 that transmits a registration notification indicating that the registration is accepted to the unregistered terminal when the determination unit 134 determines that the registration is possible.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a fire alarm system, a control device, and a terminal. [Background technology]

[0002] Conventionally, there is known a fire alarm system in which a fire receiver polls a plurality of fire detectors to obtain status information indicating a status detected by the fire detectors (e.g., occurrence of a fire or occurrence of smoke). Conventional fire receivers sequentially specify and poll the addresses of terminals such as fire detectors or repeaters, and only the terminals corresponding to the specified addresses transmit status information to the fire receiver (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-035780 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a new terminal was installed, if the address was not set properly and overlapped with the address of an existing terminal, a problem occurred in which multiple terminals would simultaneously send status information in response to a polling signal sent by the fire control receiver.

[0005] The present invention has been made in consideration of these points, and has an object to prevent a plurality of terminals from transmitting data simultaneously. [Means for solving the problem]

[0006] A first aspect of the present invention is a fire alarm system comprising a plurality of terminals and a control device communicating with the plurality of terminals via a communication line, the control device comprising: a status information receiving unit that receives status information during a period for registered terminals in which one or more registered terminals can transmit status information indicating the status of the registered terminal; a registration request receiving unit that receives a registration request from an unregistered terminal during a period for unregistered terminals that is different from the period for registered terminals; a determination unit that, when the registration request is received, determines whether the unregistered terminal that transmitted the registration request can be registered; and a notification sending unit that, when the determination unit determines that registration is possible, sends a registration notification to the unregistered terminal indicating that registration has been approved, and the terminal comprises a terminal sending unit that sends the registration request to the control device during the period for unregistered terminals in an unregistered state; a terminal receiving unit that receives the registration notification from the control device; and a transmission control unit that controls the terminal sending unit to transmit the status information to the control device during the period for registered terminals after the terminal receiving unit receives the registration notification.

[0007] The terminal transmission unit may transmit the registration request including the address of the terminal to the control device, and the determination unit may determine that the unregistered terminal is eligible for registration on the condition that the address included in the registration request is different from the addresses of the one or more registered terminals.

[0008] When the notification sending unit determines that the unregistered terminal is capable of registration, it sends the registration notification to the unregistered terminal, the registration notification including information indicating a registered terminal-specific period during which the registered terminal is capable of transmitting the status information, and the transmission control unit may control the terminal sending unit to transmit the status information to the control device during the registered terminal-specific period received from the control device.

[0009] The control device may further have a memory unit that stores addresses of the multiple registered terminals in association with a registered terminal-specific period during which the registered terminal can transmit the status information, and when the determination unit determines that the unregistered terminal is capable of registration, the determination unit may store in the memory unit the address of the unregistered terminal in association with the registered terminal-specific period to be notified to the unregistered terminal.

[0010] The terminal may further have an output unit that outputs warning information if the terminal receiving unit does not receive the registration notification within a predetermined period of time after the terminal transmitting unit transmits the registration request to the control device.

[0011] A control device of a second aspect of the present invention is a control device for a fire alarm system that receives status information indicating the status of a plurality of terminals from a plurality of terminals, and may have a status information receiving unit that receives the status information during a period for registered terminals in which one or more registered terminals are able to transmit the status information, a registration request receiving unit that receives a registration request from an unregistered terminal that is not registered during a period for unregistered terminals that is different from the period for registered terminals, a judgment unit that, when the registration request is received, judges whether the unregistered terminal that sent the registration request can be registered, and a notification sending unit that, when the judgment unit judges that registration is possible, sends a registration notification to the unregistered terminal indicating that the registration has been approved.

[0012] A third aspect of the present invention is a terminal that transmits status information indicating the surrounding condition to a control device of a fire alarm system, and has a terminal transmitting unit that, in an unregistered state where it is not registered to the control device, transmits a registration request to the control device to register the terminal during an unregistered terminal period that is different from a registered terminal period in which one or more registered registered terminals can transmit status information indicating the status of the terminal, a terminal receiving unit that receives a registration notification from the control device indicating that the terminal has been registered, and a transmission control unit that controls the terminal transmitting unit to transmit the status information to the control device during the registered terminal period after the terminal receiving unit receives the registration notification. Effect of the Invention

[0013] According to the present invention, even if the address of an additionally installed terminal mistakenly overlaps with the address of any one of the terminals before the additional installation, it is possible to prevent a system malfunction due to information collision when accessing the terminal. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a fire alarm system. [Diagram 2] FIG. 2 is a diagram showing a communication method between a control device 1 and a plurality of terminals. [Diagram 3] FIG. 13 is a diagram showing a communication method after a terminal with address X is registered. [Figure 4] FIG. 2 is a diagram illustrating a configuration of a control device. [Diagram 5] FIG. 2 is a diagram showing the configuration of a terminal. [Figure 6] 4 is a flowchart showing a process flow in the control device. [Figure 7] 13 is a flowchart showing a process flow in the terminal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [Fire Alarm System S Overview] 1 is a diagram showing an example of the configuration of a fire alarm system S. The fire alarm system S includes a control device 1 and multiple terminals 2. The control device 1 is included in a fire receiver and functions as a control panel. The control device 1 is connected to multiple communication lines L, and is connected to multiple terminals 2 via the communication lines L.

[0016] The multiple terminals 2 are condition detection terminals, such as smoke detectors 2A or heat detectors 2B, for detecting abnormal conditions such as fire, smoke, or strange odors in a facility in which a fire alarm system S is installed. As shown in Fig. 1, the multiple terminals 2 may include a repeater 2C connected to multiple smoke exhaust terminals ER.

[0017] Unique identification information is assigned to each of the multiple terminals 2. For example, a unique address 00 to FF is assigned to each of the multiple terminals 2. The address may be in hexadecimal, decimal, binary, or any other format. The terminal 2 has a setting processing unit (not shown) for setting the address, and for example, when the terminal 2 is installed, the address of the terminal 2 is set by an installer.

[0018] The control device 1 sequentially polls at least some of the multiple terminals 2 via the communication line L to collect status information indicating the status of the surroundings of the terminal 2 sensed by each of the multiple terminals 2. In the fire alarm system S, the control device 1 transmits a polling signal in a time slot that is a registered terminal-specific period corresponding to a period allocated to multiple terminals 2 (hereinafter sometimes referred to as "registered terminals") that have been registered in advance. When each of the multiple terminals 2 receives a polling signal in the time slot allocated to it, it transmits a response signal including status information to the control device 1.

[0019] Fig. 2 is a diagram showing a communication method between the control device 1 and multiple terminals 2. In the example shown in Fig. 2, a time slot during which each of the terminals 2 from address 00 to address n can transmit a response signal is assigned to a registered terminal period during which multiple terminals 2 registered in advance can transmit a response signal to the control device 1. The time slot is, for example, a period such as TS00, TS01 shown in Fig. 2, during which the control device 1 transmits a polling signal to the terminal 2, and then the terminal 2 transmits a response signal to the control device 1.

[0020] The registered terminal period is followed by an unregistered terminal period (also called a wake-up slot) during which an unregistered terminal, which is a terminal 2 that is not registered with the control device 1, can transmit a registration request to request registration. During the unregistered terminal period, the control device 1 does not transmit a polling signal, and the unregistered terminal 2 (terminal 2 with address X in FIG. 2) transmits a registration request to the control device 1.

[0021] Thereafter, the control device 1 transmits, to the terminal 2 that transmitted the registration request, a registration notification indicating that registration is permitted, or a rejection notification indicating that registration is not permitted, during the unregistered terminal period. The registration notification may include information indicating the time slots that the newly registered terminal 2 can use. As will be described in detail later, the control device 1 may transmit a registration notification when the address of the unregistered terminal 2 does not match the address of another registered terminal 2, and may transmit a rejection notification when the address of the unregistered terminal 2 matches the address of another registered terminal 2.

[0022] Fig. 3 is a diagram showing a communication method after a terminal 2 with address X is registered. In Fig. 3, the newly registered terminal 2 with address X is assigned to a time slot xx. The control device 1 can assign any time slot selected from one or more unused time slots to an unregistered terminal 2 that is available for registration.

[0023] Thus, the terminal 2 that has received the registration notification and been assigned a time slot can then transmit a response signal including status information in the assigned time slot. On the other hand, the terminal 2 that has received the rejection notification does not transmit a signal. By operating the control device 1 and terminal 2 in the above manner, it is possible to prevent multiple terminals 2 from transmitting signals simultaneously, even if the address set for a terminal 2 that is not registered in the control device 1 is the same as the address of a terminal 2 that has been registered. The configurations of the control device 1 and the terminal 2 will be described in detail below.

[0024] [Configuration of control device 1] 4 is a diagram showing the configuration of the control device 1. The control device 1 has a communication unit 11, a storage unit 12, and a control unit 13. The control unit 13 has a polling signal transmission unit 131, a status information reception unit 132, a registration request reception unit 133, a determination unit 134, and a notification transmission unit 135.

[0025] The communication unit 11 has a communication interface for communicating with the terminal 2 via the communication line L. The communication unit 11 transmits a polling signal generated by a polling signal transmitting unit 131 to the terminal 2 via the communication line L, receives status information transmitted by the terminal 2, and inputs the received status information to the status information receiving unit 132.

[0026] The storage unit 12 includes storage media such as a Read Only Memory (ROM), a Random Access Memory (RAM), and a Solid State Drive (SSD). The storage unit 12 stores a program executed by the control unit 13. The storage unit 12 also stores information related to the multiple terminals 2.

[0027] The storage unit 12 stores, for example, addresses of multiple registered terminals in association with a registered terminal-specific period during which the registered terminals can transmit status information. That is, the storage unit 12 stores registered terminal data in which a time slot number is associated with an address of a terminal 2 that can transmit and receive signals in a time slot corresponding to the time slot number. The storage unit 12 may store status information transmitted from multiple terminals 2 in association with the address of the terminal 2.

[0028] The control unit 13 has, for example, a CPU (Central Processing Unit) and executes various processes. The control unit 13 executes the programs stored in the storage unit 12, thereby functioning as a polling signal transmission unit 131, a status information reception unit 132, a registration request reception unit 133, a determination unit 134, and a notification transmission unit 135.

[0029] The polling signal transmitting unit 131 transmits a polling signal to a plurality of registered terminals 2. In each time slot, the polling signal transmitting unit 131 transmits a polling signal to a terminal 2 whose address is stored in the storage unit 12 in association with the time slot. The polling signal includes start data, address data, command data, parameters, check data, and stop data. The address data is the address of the terminal 2 assigned to the time slot. The check data is provided so that the terminal 2 can check whether the address data, command data, and parameter values ​​have been correctly received, and is, for example, checksum or CRC (Cyclic Redundancy Check) data.

[0030] The status information receiving unit 132 receives status information indicating the status of the multiple terminals 2 from the multiple terminals 2 via the communication unit 11. The status information receiving unit 132 receives status information during a registered terminal period during which one or more registered terminals can transmit status information indicating the status of the registered terminal. The status information receiving unit 132 receives status information contained in a response signal transmitted from a registered terminal 2 in response to transmitting a polling signal. The response signal contains start data, address data, parameters, check data, and stop data. The address data is the address of the terminal 2 that transmitted the response signal.

[0031] The registration request receiving unit 133 receives a registration request from an unregistered terminal 2 during an unregistered terminal period that is different from the registered terminal period. The registration request includes the address of the terminal 2 that has transmitted the registration request.

[0032] When the registration request receiving unit 133 receives a registration request, the determination unit 134 determines whether or not the unregistered terminal 2 that transmitted the registration request can be registered. The determination unit 134 determines that the unregistered terminal can be registered, for example, on the condition that the address included in the registration request is different from the addresses of one or more registered terminals.

[0033] Specifically, the determination unit 134 determines whether or not the address included in the registration request is included in the registration terminal data by referring to the registration terminal data stored in the storage unit 12. When the address included in the registration request is not included in the registration terminal data, the determination unit 134 determines that the terminal 2 that transmitted the registration request is registerable. When the address included in the registration request is included in the registration terminal data, the determination unit 134 determines that the terminal 2 that transmitted the registration request is not registerable.

[0034] Furthermore, when the determination unit 134 determines that the unregistered terminal can be registered, it associates the address of the unregistered terminal with a period (i.e., a time slot) for each registered terminal to be notified to the unregistered terminal, and stores them in the storage unit 12. Furthermore, the determination unit 134 notifies the notification transmission unit 135 of the determination result. Note that the determination unit 134 may determine that registration is not possible when it is assumed that the terminal 2 is not a legitimate terminal, such as when the format of the registration request is not an appropriate format.

[0035] When the determination unit 134 determines that registration is possible, the notification sending unit 135 transmits a registration notification indicating that registration has been approved to the unregistered terminal 2 that transmitted the registration request. That is, when the address included in the registration request is not included in the registered terminal data, the notification sending unit 135 transmits a registration notification including the address of terminal 2 to terminal 2. When the notification sending unit 135 determines that an unregistered terminal is possible to register, it transmits a registration notification including information indicating a registration terminal-specific period during which a registered terminal can transmit status information to the unregistered terminal. The information indicating the registration terminal-specific period is, for example, a time slot number.

[0036] [Device 2 configuration] 5 is a diagram showing the configuration of terminal 2. Terminal 2 has a communication unit 21, an input unit 22, a display unit 23, a storage unit 24, and a control unit 25. The control unit 25 has a terminal receiving unit 251, a terminal transmitting unit 252, a transmission control unit 253, and an output unit 254.

[0037] The terminal 2 operates in three modes: startup mode, registration mode, and rejection mode. The startup mode is the operating mode when the terminal 2 is installed, and is a mode in which the terminal 2 transmits a registration request to the control device 1. The registration mode is the operating mode after receiving a registration notification from the control device 1, and is a mode in which the terminal 2 transmits a response signal including status information in response to receiving a polling signal from the control device 1. The rejection mode is the operating mode after receiving a rejection notification from the control device 1, and is a mode in which the terminal 2 does not transmit a signal to the control device 1 during the registration terminal period, and outputs warning information.

[0038] The communication unit 21 has a communication interface for communicating with the control device 1 via the communication line L. The communication unit 21 receives a polling signal transmitted by the control device 1, and inputs the received polling signal to the terminal receiving unit 251. The communication unit 21 also transmits to the control device 1 the status information and the registration request input from the terminal transmitting unit 252.

[0039] The input unit 22 detects the state of the surroundings of the terminal 2 and receives input of information for operating the terminal 2. The input unit 22 is, for example, a heat detection sensor, a smoke detection sensor, a flame sensor, or an illuminance sensor. The input unit 22 may receive input of information for operating a smoke exhaust terminal device.

[0040] The display unit 23 includes a display device (for example, a light emitting diode) that displays information. The display unit 23 changes the display mode based on the information input from the output unit 254.

[0041] The storage unit 24 has a storage medium such as a ROM and a RAM. The storage unit 24 stores a program executed by the control unit 25. The storage unit 24 stores a preset address of the terminal 2. The storage unit 24 also stores the number of a time slot during which the terminal 2 can transmit status information. Furthermore, the storage unit 24 may store status information indicating the surrounding status of the terminal 2 detected by the input unit 22 in association with time.

[0042] The control unit 25 includes, for example, a CPU. The control unit 25 executes a program stored in the storage unit 24 to function as a terminal receiving unit 251, a terminal transmitting unit 252, a transmission control unit 253, and an output unit 254.

[0043] The terminal receiving unit 251 receives a signal transmitted by the control device 1 via the communication unit 21. When the terminal 2 is registered in the control device 1, the terminal receiving unit 251 receives a polling signal from the control device 1. In addition, when the terminal 2 transmits a registration request in the startup mode, the terminal receiving unit 251 receives a registration notification or a rejection notification from the control device 1.

[0044] The terminal receiving unit 251 receives a polling signal that includes an address stored in the storage unit 24 as a destination address. The terminal receiving unit 251 may determine whether the polling signal is addressed to the terminal by comparing the address of the terminal itself stored in the storage unit 24 with the destination address included in the polling signal. In this case, when the terminal receiving unit 251 determines that a polling signal addressed to the terminal itself has been received, it notifies the terminal transmitting unit 252 that a polling signal has been received.

[0045] When the terminal 2 is registered in the control device 1, the terminal transmission unit 252 transmits a response signal including status information in response to the polling signal. The terminal transmission unit 252 reads out the status information stored in the storage unit 24, and transmits a response signal including the status information in the time slot assigned to the terminal 2.

[0046] The terminal transmitting unit 252 transmits a registration request to the control device 1 in an unregistered state in which the terminal 2 is not registered in the control device 1, i.e., in the startup mode, during an unregistered terminal period. The terminal transmitting unit 252 transmits a registration request including the address of the terminal 2 to the control device 1. The terminal transmitting unit 252 transmits the registration request based on, for example, an instruction from the transmission control unit 253. The terminal transmitting unit 252 may transmit the registration request on the condition that the number of a time slot in which a response signal can be transmitted is not stored in the storage unit 24.

[0047] The transmission control unit 253 controls the terminal transmission unit 252 to transmit the status information or the registration request. The transmission control unit 253, for example, identifies the timing at which the unregistered terminal period starts (i.e., the timing at which the registered terminal period ends) by monitoring the addresses included in the multiple polling signals received by the terminal reception unit 251. When the terminal 2 is not registered in the control device 1, the transmission control unit 253 instructs the terminal transmission unit 252 to transmit a registration request in response to the timing at which the unregistered terminal period starts. For example, when a time slot number available for the terminal 2 is not stored in the storage unit 24, the transmission control unit 253 causes the terminal transmission unit 252 to transmit the registration request.

[0048] The transmission control unit 253 may cause the terminal transmission unit 252 to transmit a registration request in response to receiving an instruction from the outside to register the terminal 2 in the control device 1. For example, when a registration operation is performed on the input unit 22, the transmission control unit 253 causes the terminal transmission unit 252 to transmit the registration request.

[0049] Furthermore, after the terminal receiving unit 251 receives the registration notification, the transmission control unit 253 controls the terminal transmitting unit 252 to transmit status information to the control device 1 during the registration terminal period. By having the transmission control unit 253 cause the terminal receiving unit 251 to transmit status information during the registration terminal period, it is possible to prevent an unregistered terminal 2 from transmitting status information at the timing when the unregistered terminal 2 transmits a registration request.

[0050] When multiple terminals 2 are registered in the control device 1, the transmission control unit 253 controls the terminal transmission unit 252 to transmit status information to the control device 1 during the period for each registered terminal received from the control device 1. By operating the transmission control unit 253 in this manner, it is possible to prevent the terminal 2, after being registered in the control device 1, from transmitting status information to the control device 1 at the same time as other terminals 2 registered in the control device 1.

[0051] When the terminal receiving unit 251 receives a rejection notification from the control device 1, the transmission control unit 253 stops the transmission operation of the terminal transmitting unit 252. That is, the transmission control unit 253 does not cause the terminal transmitting unit 252 to transmit the status information and the registration request. By operating the transmission control unit 253 in this manner, when the address of the terminal 2 is the same as the address of another terminal 2 registered in the control device 1, it is possible to prevent the terminal 2 from transmitting the status information simultaneously with the other terminal 2. It is also possible to prevent the terminal transmitting unit 252 from repeatedly transmitting the registration request for a long period of time, which would cause the other unregistered terminal 2 to be unable to transmit the registration request.

[0052] The output unit 254 outputs warning information when the terminal receiving unit 251 does not receive a registration notification within a predetermined period of time after the terminal transmitting unit 252 transmits a registration request to the control device 1. The output unit may retry to resend the registration request when the terminal receiving unit 251 does not receive a registration notification before the predetermined period of time has elapsed. The predetermined period of time is the time required for the control device 1, which has received the registration request, to transmit a registration notification, and is equal to or greater than the combined time of the period for registered terminals and the period for unregistered terminals.

[0053] When a registration notification is not received within a predetermined period of time or when a rejection notification is received, output unit 254 instructs display unit 23 to change the display mode. When display unit 23 has a light-emitting diode, output unit 254 lights up the light-emitting diode when a registration notification is not received or when a rejection notification is received. By output unit 254 operating in this manner, it becomes possible for the person installing terminal 2 to notice that he or she has made a mistake in setting the address.

[0054] [Processing flow in the control device 1 and terminal 2] Fig. 6 is a flowchart showing the flow of processing in the control device 1. The flowchart shown in Fig. 6 starts from the point in time when the control device 1 is powered on and starts operating.

[0055] The polling signal transmitting unit 131 sets the period of the minimum time slot in the period for registered terminals (S10), and transmits a polling signal to the registered terminal 2 assigned to that time slot (S11). The status information receiving unit 132 receives a response signal including status information from the terminal 2 (S12).

[0056] Next, polling signal transmitting unit 131 determines whether the time slot was the final time slot in the registration terminal period (S13), and if it determines that it was not the final time slot (NO in S13), sets it to the next time slot (S14) and transmits a polling signal (S11). Polling signal transmitting unit 131 repeats S11 to S14 until it reaches the final time slot, and if it determines in S13 that it is the final time slot (YES in S13), it notifies registration request receiving unit 133 that the registration terminal period has ended.

[0057] The registration request receiving unit 133 waits for reception of a registration request during the unregistered terminal period (S15). When the registration request receiving unit 133 receives a registration request (YES in S15), the determination unit 134 determines whether or not the terminal 2 that transmitted the registration request can be registered (S16). When the address of the terminal 2 included in the registration request is not included in the registration terminal data, the determination unit 134 determines that the terminal 2 is registerable (YES in S16), and the notification sending unit 135 sends a registration notification to the terminal 2 (S17). When the address of the terminal 2 included in the registration request is included in the registration terminal data, the determination unit 134 determines that the terminal 2 is not registerable (NO in S16), and the notification sending unit 135 sends a rejection notification to the terminal 2 (S18).

[0058] The control unit 13 repeats the processes from S10 to S18 until the power supply of the control device 1 is turned off (NO in S19). Through the above procedure, the control device 1 can monitor the state of the registered terminal 2, and can newly register an unregistered terminal 2 that can be registered, or can reject the registration of an unregistered terminal 2 that cannot be registered.

[0059] Fig. 7 is a flowchart showing the flow of processing in the terminal 2. The flowchart shown in Fig. 7 starts from the point in time when the terminal 2 is installed.

[0060] When the terminal 2 is installed, the control unit 25 sets the start-up mode (S20), and the terminal receiving unit 251 determines whether or not the unregistered terminal period has started by monitoring a polling signal received from the control device 1 (S21). If the terminal receiving unit 251 determines that the unregistered terminal period has started (YES in S21), the terminal transmitting unit 252 transmits a registration request to the control device 1 (S23). If the terminal receiving unit 251 does not determine that the unregistered terminal period has started (NO in S21), the terminal transmitting unit 252 waits without transmitting a registration request (S22).

[0061] When the terminal transmitting unit 252 transmits the registration request, the transmission control unit 253 monitors whether the terminal receiving unit 251 receives a registration notification (S24). When the terminal receiving unit 251 receives the registration notification (YES in S24), the transmission control unit 253 stores the time slot number notified from the control device 1 in the storage unit 24 and sets the mode to approval (S25). After that, the transmission control unit 253 controls the terminal transmitting unit 252 to transmit a response signal including status information after the terminal receiving unit 251 receives a polling signal (S26).

[0062] On the other hand, if the terminal receiving unit 251 does not receive the registration notification but receives a rejection notification (NO in S24), the transmission control unit 253 sets the mode to the rejection mode (S27). In the rejection setting mode, the transmission control unit 253 controls the output unit 254 to output warning information, and the output unit 254 outputs the warning information using the display unit 23 (S28).

[0063] [Effects of Fire Alarm System S] As described above, the control device 1 obtains status information from registered terminals 2 by polling during the period for registered terminals, and accepts registration requests from unregistered terminals 2 during the period for unregistered terminals. Then, when the control device 1 determines that the terminal 2 can be registered, such as when the address of the terminal 2 that transmitted the registration request does not match the address of the registered terminal 2, the control device 1 transmits a registration notification to the terminal 2, and the terminal 2 starts transmitting a response signal including status information during the period for registered terminals. By the control device 1 and the terminal 2 operating in this manner, it is possible to prevent multiple terminals 2 from transmitting data simultaneously, even if the address of a terminal 2 not registered in the control device 1 is not set appropriately or the terminal 2 is not a legitimate terminal.

[0064] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. For example, all or part of the device can be configured by distributing or integrating functionally or physically in any unit. In addition, new embodiments resulting from any combination of multiple embodiments are also included in the embodiments of the present invention. The effect of the new embodiment resulting from the combination combines the effect of the original embodiment. [Explanation of symbols]

[0065] 1 Control device 2. Terminal 11 Communications Department 12 Storage section 13 Control section 21 Communications Department 22 Input section 23 Display section 24 Memory section 25 Control Unit 131 Polling signal transmitter 132 Status information receiver 133 Registration request receiver 134 Judgment section 135 Notification sending unit 251 Terminal receiving unit 252 Terminal transmitter 253 Transmission control section 254 Output section

Claims

1. A fire alarm system comprising a plurality of terminals and a control device that communicates with the plurality of terminals via a communication line, The control device includes: a status information receiving unit that receives status information during a registration terminal period during which one or more registered terminals can transmit status information indicating a status of the registered terminal in response to the control device transmitting a polling signal; a registration request receiving unit that receives a registration request from an unregistered terminal that has not been registered during an unregistered terminal period that is provided after the registration terminal period including a predetermined number of registration terminal periods on a time axis in which the control device does not transmit the polling signal, unlike the registration terminal period; a determination unit that, when receiving the registration request, determines whether or not the unregistered terminal that transmitted the registration request can be registered; a notification sending unit that sends a registration notification indicating that the registration has been approved to the unregistered terminal when the determination unit determines that the registration is possible; having The terminal includes: a terminal transmitting unit configured to, in an unregistered state, transmit the registration request to the control device during the unregistered terminal period identified by monitoring an address included in the polling signal transmitted during the registration terminal-specific period; a terminal receiving unit for receiving the registration notification from the control device; a transmission control unit that controls the terminal transmitting unit so as to transmit the status information to the control device during the registration terminal period after the terminal receiving unit receives the registration notification; A fire alarm system having:

2. The terminal transmitting unit transmits the registration request including an address of the terminal to the control device, the determination unit determines that the unregistered terminal is registerable on condition that an address included in the registration request is different from an address of the one or more registered terminals. The fire alarm system according to claim 1 .

3. when it is determined that the unregistered terminal is capable of being registered, the notification transmission unit transmits to the unregistered terminal the registration notification including information indicating the registration terminal specific period during which the registered terminal is capable of transmitting the status information; The transmission control unit controls the terminal transmission unit to transmit the status information to the control device during the registration-specific terminal period received from the control device.

3. A fire alarm system according to claim 1 or 2.

4. The control device further includes a storage unit that stores addresses of the plurality of registered terminals and the registered terminal-specific period, which is a period during which the registered terminal can transmit the status information, in association with each other; When the determination unit determines that the unregistered terminal can be registered, the determination unit causes the storage unit to store an address of the unregistered terminal and the period for each registered terminal to be notified to the unregistered terminal in association with each other. A fire alarm system according to any one of claims 1 to 3.

5. The terminal further includes an output unit that outputs warning information when the terminal receiving unit does not receive the registration notification within a predetermined period of time after the terminal transmitting unit transmits the registration request to the control device. A fire alarm system according to any one of claims 1 to 4.

6. A control device for a fire alarm system that receives status information indicating statuses of a plurality of terminals from the plurality of terminals, a status information receiving unit that receives the status information during a registration terminal period during which one or more registered terminals can transmit the status information in response to the control device transmitting a polling signal; a registration request receiving unit that receives a registration request from an unregistered terminal that has not been registered during an unregistered terminal period that is provided after the registration terminal period including a predetermined number of registration terminal periods on a time axis in which the control device does not transmit the polling signal, unlike the registration terminal period; a determination unit that, when receiving the registration request, determines whether or not the unregistered terminal that transmitted the registration request can be registered; a notification sending unit that sends a registration notification indicating that the registration has been approved to the unregistered terminal when the determination unit determines that the registration is possible; A control device having the above configuration.

7. A terminal that transmits status information indicating a surrounding state to a control device of a fire alarm system, a terminal transmitting unit that, in an unregistered state where the terminal is not registered in the control device, transmits a registration request to the control device during an unregistered terminal period that is provided after a registered terminal period including a predetermined number of the registered terminal periods on a time axis during which the control device does not transmit the polling signal, the unregistered terminal period being identified by monitoring an address included in a polling signal transmitted by the control device during a registered terminal period during which one or more registered registered terminals can transmit status information indicating the status of the registered terminal; a terminal receiving unit that receives, from the control device, a registration notification indicating that the terminal has been registered; a transmission control unit that controls the terminal transmitting unit so as to transmit the status information to the control device during the registration terminal period after the terminal receiving unit receives the registration notification; A terminal having the above configuration.

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