JP4090038B2 - Fire alarm system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a fire receiver, a monitoring target device such as a sensor monitored by the fire receiver, and a repeater that relays a predetermined signal between the fire receiver and the monitoring target device. It relates to information equipment.
[0002]
[Prior art]
In the conventional apparatus, the terminal capacitor, the disconnecting means, the discharging means, the voltage detecting means, and the disconnection determining means are provided, so that the disconnection is made according to the voltage of the pair of power supply / signal lines connecting the fire detector. (See, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-249560 (first page, FIG. 1)
[0004]
[Problems to be solved by the invention]
In the conventional device, the voltage of the power / signal line was detected a plurality of times, and the disconnection was determined according to the result of this detection, but while the power / signal line was monitored to detect the voltage, There is a problem that processing other than the disconnection determination processing cannot be executed, and the processing capability is reduced. This is the same even when a monitoring device such as a fire receiver or a repeater monitors a monitoring target device such as a sensor.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a fire alarm facility capable of enhancing the processing capability.
[0006]
[Means for Solving the Problems]
In the fire alarm facility according to the present invention, a plurality of terminal devices are connected to one transmission line from the fire receiving unit, and there is a repeater with a test function as one of the terminal devices. In a fire alarm facility in which one or more detectors with a test function are connected to the sensor line from and the fire receiving unit individually monitors and controls each terminal device, the sensor with a test function is relayed with the test function vessel on the basis of the control command, transmits a pulse waveform signal indicating the state of said test function detector to the test function relay, said test function repeater, a pulse waveform from said test function detector while receiving the signal, based on said pulse waveform signal, said a fire alarm system to perform processing on the status monitoring of the test function detector, the test function repeater When receiving the previous SL pulse waveform signal, when detecting the starting point for the previous SL pulse waveform signal, said test function sensor is normal or abnormal by the distance until detecting the end point defined from the start point And processing related to signal transmission with the fire receiver in the middle of the interval .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
A fire alarm facility according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a fire alarm facility according to Embodiment 1 of the present invention. Moreover, FIG. 2 is a figure which shows the example of a connection of the repeater and detector of the fire alarm equipment which concern on Embodiment 1 of this invention. FIG. 3 is a diagram showing a detailed configuration of the repeater of the fire alarm facility according to Embodiment 1 of the present invention. In addition, in each figure, the same code | symbol shows the same or equivalent part.
[0008]
The fire alarm facility according to the first embodiment will be outlined. Equipped with a receiving unit (receiving device) such as a fire receiver and a repeater, and a monitoring control device such as a fire detector and controlled device. The receiving unit and a plurality of monitoring control devices transmit via a transmission line. Each operation related to supervisory control using codes is performed. In the following description, a receiving unit using a repeater will be described as an example, but the same applies to a fire receiver.
[0009]
In FIG. 1, a transmission line L11 is wired from a fire receiver 10 to a plurality of repeaters 20 with a test function as a plurality of terminal devices that are transmission terminals. Although not shown in the figure, a fire detector, a fire transmitter, and the like are connected to the transmission line L11 as models of other terminal devices, and are individually assigned individual addresses. The fire receiver 10 can individually recognize the terminal device and transmit the signal. In the transmission line L11, two electric wires S + and S- are sent and wired to each terminal device and connected in parallel. On the other hand, a power line P <b> 1 is wired from the fire receiver 10 to each repeater 20 separately from the electric wires S + and S−. The power line P1 supplies power for operating various devices (not shown in FIG. 1) connected to each repeater 20, and the various devices are connected via a signal line L21. Connected to the repeater 20. Examples of the various devices (monitored devices) include monitoring devices such as fire detectors and controlled devices such as district bells and smoke control devices. Here, the signal line L21 is used as a sensor line, and the repeater 20 is connected to the general type sensor and the automatic test function-equipped sensor (ATF sensor) through the sensor line L21. . Note that the two electric wires PFC, PF are also connected to each relay 20 in parallel for the power supply line P1.
[0010]
This will be specifically described. 1 and 2, the fire alarm system includes a fire receiver 10 and a plurality of repeaters connected to the fire receiver 10 through transmission lines S + and S− (hereinafter collectively referred to as “transmission line L11”). 20 and a plurality of sensors 30 connected to each repeater 20 through a sensor line L21. The fire receiver 10 is connected to each repeater 20 through power supply lines PFC and PF (hereinafter collectively referred to as “power supply line P1”). The power supply line P1 is for supplying power of, for example, 24V, and the repeater 20 and the sensor 30 are supplied with power through the power supply line P1.
[0011]
The fire receiver 10 manages the entire fire alarm system, and includes a control unit such as a CPU, a display operation unit such as a touch panel, a storage unit such as a memory, and a transmission / reception unit.
[0012]
The sensor 30 is connected with, for example, a general type sensor (on / off type) and a sensor with an automatic test function (hereinafter abbreviated as ATF sensor). The ATF sensor transmits and receives transmission signals for collecting test information. In addition, the fire signal from the ATF sensor is an on / off signal as in the general type sensor, and is received by the repeater 20. That is, the fire signal from the ATF sensor is not a transmission signal, but performs a so-called switching operation, and puts the sensor line L21 in a low impedance state.
[0013]
The repeater 20 performs signal transmission with the fire receiver 10 and the detector 30. In FIG. 2, the sensor 30 is connected to the connection part TB2 of the repeater 20 for each of the lines L1, L2, L3, and L4. Each of the sensors 30 is connected to a termination resistor 40. The termination resistor 40 has a resistance of 10 kΩ, for example. The external wiring resistance is 50Ω, and the maximum number of sensors installed is 30 as an example. The address of the repeater 20 is set by a rotary switch (not shown).
[0014]
In FIG. 3, the repeater 20 includes a transmission constant voltage circuit 21, a reception circuit 22, a transmission circuit 23, and a photocoupler 24. The repeater 20 includes a CPU (control unit) 25, a control constant voltage circuit 26, a monitoring circuit 27, an output circuit 28, and a detection circuit 29. S indicates the sensor 30.
[0015]
The transmission constant voltage circuit 21 supplies power to the reception circuit 22 and the transmission circuit 23. The transmission constant voltage circuit 21 is connected to the transmission line L11 and outputs, for example, a 5V power source.
[0016]
The receiving circuit 22 receives a pulse on the transmission line L11. The transmission circuit 23 transmits a pulse on the transmission line L11. Thereby, the transmission / reception circuits (transmission circuit units) 22 and 23 transmit and receive signals via the fire receiver 10 and the transmission line L11.
[0017]
The photocoupler 24 a is connected between the reception circuit 22 and the CPU 25, and the photocoupler 24 b is connected between the transmission circuit 23 and the CPU 25. As a result, the number of photocouplers can be reduced as compared with the conventional case in which a photocoupler is provided for each line of the sensor 30.
[0018]
The CPU 25 monitors and controls each part in the repeater 20 and performs signal transmission separately from the fire receiver 10 and the sensor 30.
[0019]
The control constant voltage circuit 26 is connected to the fire receiver 10 via a power line P1 different from the transmission line L11 and supplies power to the CPU 25. The control constant voltage circuit 26 also supplies power to the detection circuit 29. This power supply voltage is, for example, 3V. That is, the control constant voltage circuit 26 steps down the power supply voltage supplied from the fire receiver 10 via the power supply line P1 (for example, steps down from 24V to 3V).
[0020]
The monitoring circuit 27 monitors the state of power supply via the power line P1. This monitoring is a monitoring of the voltage level of power supply (for example, 24V supply) via the power supply line P1. For example, when the voltage level is equal to or lower than a certain value, the monitoring circuit 27 determines that there is an abnormality. This constant value can be set in advance. When the voltage level monitored by the monitoring circuit 27 is equal to or less than a certain value, the CPU 25 outputs that fact (for example, an abnormal signal) to the fire receiver 10. Thereby, the environment where the sensor 30 connected to the repeater 20 operates normally can be managed.
[0021]
The output circuit 28 outputs a transmission pulse to the sensor 30 via the sensor line L21. The detection circuit 29 detects a switching operation when a fire signal is received from the sensor 30 via the sensor line L21, and detects a transmission pulse from the sensor 30. The transmission pulse is a signal that alternately repeats the “high” or “low” level, and the fire signal is a signal that continues the “low” level. The CPU 25 determines either the transmission pulse or the fire signal.
[0022]
Thus, the repeater 20 is connected to the fire receiver 10 via the transmission constant voltage circuit 21 that supplies power to the transmission / reception circuits 22 and 23, and the power line P1 different from the transmission line L11, and the CPU 25. And a control constant voltage circuit 26 for supplying a power source. Therefore, even if the ATF sensor is installed in the fire alarm facility, the transmission capability is not hindered.
[0023]
Next, the operation of the fire alarm system according to Embodiment 1 will be described with reference to the drawings.
[0024]
FIG. 4 is a time chart showing an example of polling between the repeater of the fire alarm facility and the fire receiver according to Embodiment 1 of the present invention.
[0025]
The transmission line L11 connects the fire receiver 10 and the repeater 20 as one of a plurality of terminal devices. Each terminal device including the repeater 20 is individually assigned an individual address. As shown in FIG. 2, a plurality of ATF sensors 30 are connected to the repeater 20 via a sensor line L21.
[0026]
When signal transmission is performed on the transmission line L11, a plurality of groups are set with a predetermined number of terminal devices as one group, the fire receiver 10 specifies the predetermined group, and the terminal devices belonging to the specified group Executes point polling that responds individually, and each terminal device belonging to the designated group measures the timing according to its own address and responds continuously individually.
[0027]
By executing this point polling for all the groups, information indicating the respective states is collected from all the terminal devices on the transmission line L11. In the monitoring state, information collection is repeated with the above operation as one cycle.
[0028]
Here, each terminal device is given an address on the transmission line L11 defined by a 2-digit hexadecimal number for each terminal device. In other words, addresses such as “00h” and “01h” are assigned to each terminal device, and each of the addresses is given as a unique address different from each other. Terminal devices to which addresses are assigned are divided into a plurality of groups, for example, 15 groups. For example, 16 various terminal devices belong to each group.
[0029]
Thus, an address displayed in a plurality of digits is assigned to each of a plurality of terminal devices, and a group number is represented using a specific digit in the address. Therefore, in the “group information collection frame” of “point polling”, a plurality of terminal devices having a common group number can be called simultaneously with polling. In addition, each of the plurality of terminal devices having the called group number is assigned so that the response timing is different for each terminal device by using the different address of each terminal device in the group. Yes.
[0030]
The fire receiver 10 polls each terminal device on the transmission line L11 using each mode of point polling, selecting, and system polling described later, collects information from a predetermined terminal device, Control the terminal equipment.
[0031]
FIG. 5 is a time chart showing point polling, which is composed of a “group information collection frame” and a “transmitter detection frame”.
[0032]
The “group information collection frame” does not poll each terminal device one by one (calls and responds) one by one, but groups the terminal devices on the transmission line L11 into, for example, 15 groups, This is a frame called by the fire receiver 10 for each group. Each terminal device belonging to the called group sequentially returns requested data such as status information or type information ID to the fire receiver 10 at the response timing assigned to each terminal device.
[0033]
That is, in this operation, in the fire alarm facility in which a plurality of terminal devices such as the repeater 20 are connected to the fire receiver 10, the plurality of terminal devices are divided into a plurality of groups, and the fire receiver 10 is divided into groups. Boring, between a polling signal transmission to a predetermined group of a plurality of groups and a polling signal transmission to the next group, information from a plurality of terminal devices belonging to the predetermined group, The fire receiver 10 receives in a time division manner. According to this, when there are many terminal devices belonging to one group, it is possible to quickly detect the terminal device that has detected the fire.
[0034]
Here, the “state information” is physical quantity data or a fire signal of a detected fire phenomenon when the terminal device is a fire detector. On the other hand, when the terminal equipment is various repeaters, the data indicating the presence or absence of a fire signal or gas leak signal corresponds to “status information” when an on / off type fire detector or gas leak detector is connected. . In addition, when the terminal equipment is various repeaters, when controlled devices such as fire doors and district bells are connected, data indicating whether these devices are open or closed, whether they are operating, or whether they are ringing Data indicating whether or not corresponds to “status information”. In addition, when the terminal device is a fire detector having an automatic test function, an abnormal signal indicating an abnormal state also corresponds to “state information”.
[0035]
The “transmitter detection frame” constituting the point polling is used when a transmitter (not shown) is artificially operated. Since the transmitter operation information is highly reliable, it is set in a frame provided for quickly collecting operation information.
[0036]
FIG. 6 is a time chart showing selecting. “Selecting” controls the terminal device after transmitting a predetermined control command by designating an address corresponding to the desired terminal device, or transmits a request command such as status information to the desired terminal device. Later, it means an operation for collecting status information from individual terminal devices.
[0037]
Although not shown, “system polling” is for the fire receiver 10 to transmit a predetermined control command to the terminal device and control all the terminal devices. Here, the control command by the system polling is, for example, a fire recovery command (command to restore the fire alarm or terminal device such as a relay device to a normal monitoring state), a district sound stop command (ringing sound) Order to stop the district bell).
[0038]
FIG. 7 is a system flowchart showing the operation of the fire receiver 10 of FIG.
[0039]
First, after the start-up is performed by turning on the power of the fire alarm system, initial setting is performed (step S1), and then whether or not an operator inputs a selecting command to the fire receiver 10 is determined. Next, if it is not input, it is determined whether or not a system polling command is input (step S3). If the system polling command is not input, point polling is performed. (Step S4), and the process returns to Step S2. That is, the above operations (steps S2 to S4) are repeated so that the transmission in FIG.
[0040]
FIG. 8 is a waveform diagram showing an example of signal transmission between the repeater and the ATF sensor according to Embodiment 1 of the present invention.
[0041]
8, “parent” refers to the repeater 20 in FIG. 1, and “child” refers to the ATF sensor in the sensor 30 in FIG. The repeater 20 collects data of a plurality of ATF sensors provided on the sensor line L21 in a mixed manner with a general type sensor. Specifically, the repeater 20 sends a start pulse, a reference pulse, and a command CM1. Since the ATF sensor is assigned with an individual address, the repeater 20 groups the ATF sensor based on the address, and for each group, here, the activation pulse in units of 15 addresses. Or a reference pulse and a command CM1 are transmitted.
[0042]
The start pulse is a pulse for causing the ATF sensor to recognize the start of transmission, and the repeater 20 transmits a low (Lo) pulse having a pulse width of 2 ms. A microcomputer (not shown) of the ATF sensor is for performing control for entering a sleep mode after a necessary operation such as a fire detection operation. By receiving this starting pulse, it takes time to start and stabilize.
[0043]
The reference pulse is a pulse that is a basic length of a transmission pulse interval, and a falling edge interval (change timing from a high (Hi) to a low (Lo) and a next high (Hi) to a low (Lo). Is 4 ms).
[0044]
The command CM1 is a control command to the ATF sensor and indicates an 8-bit code ("b7" to "b0") with four pulse intervals, and determines the interval for each pulse and replaces it with a code.
[0045]
Here, a 2-bit code is shown at one falling edge interval. The edge interval is, for example, “00b” for 4 ms, “01b” for 6 ms, “10b” for 8 ms, and “11b” for 10 ms. These combinations form a polling 1 command CM1 for collecting data at addresses 1 to 15 and a polling 2 command CM1 for collecting data at addresses 16 to 30. Although not shown in detail, a selection as a control command for designating an ATF sensor, a sleep start command for setting the ATF sensor in a sleep mode, or the like can be used. Then, the ATF sensor recognizes the transmission content by analyzing the command CM1.
[0046]
Here, “slots 0 to 14” shown in FIG. 8 are for determining the timing of transmission from the ATF sensor to the repeater 20. The slot position (see FIG. 9A) is set based on polling 1 or 2 and its own address. The ATF sensor transmits a pulse (see FIG. 9B) indicating a code indicating normality or abnormality to the set slot. That is, in each ATF sensor, any one pulse having a pulse width of 2 ms is returned if the test function is normal or if it is abnormal, a pulse width of 4 ms is returned.
[0047]
By using such signal transmission, the repeater 20 transmits the control contents of polling 1 or 2 in the control command CM1, so that the normal or abnormal state of the ATF sensor connected to the sensor line L21 is transmitted. Information can be collected individually. At the same time, the repeater 20 determines whether the ATF sensor is not responding based on the presence / absence of a pulse in each slot.
[0048]
In this example, up to 30 ATF sensors can be addressed to one sensor line L21. However, it can be arbitrarily set according to the number of slots and the number of polling.
[0049]
As for the fire signal from the sensor 30, even if the repeater 20 is an ATF sensor, the fire signal is detected including a general-type sensor by a switching operation as in the conventional repeater. Further, the repeater 20 can collect the automatic test result and the presence / absence of the ATF sensor by signal transmission from the ATF sensor through the sensor line L21. As a result, the repeater 20 can recognize the ATF sensor that has indicated an abnormality or no response.
[0050]
Therefore, the fire detector 30 on the sensor line L21 received by the repeater 20 transmits a fire signal to the repeater 20 by a switching operation simultaneously with the detection when a fire is detected. On the other hand, when detecting its own functional abnormality, it is not necessary to be as urgent as when a fire is detected, so that stable and reliable signal transmission may be performed.
[0051]
FIG. 10 is a system flowchart showing the operation of the repeater 20 of FIG. In step 101, the CPU 25 determines whether it is time to transmit the control command CM1 to the ATF sensor. Next, in step 102, when it is the timing to transmit to the ATF sensor, the CPU 25 transmits the control command CM1 to the ATF sensor.
[0052]
Next, in step 103, the CPU 25 sets and permits the falling (“↓”) edge detection for the pulse waveform signal (see FIG. 11A) based on the control command CM1. For example, a flag is used for setting and permission. This pulse waveform signal is the same as the pulse shown in FIG. That is, this pulse waveform signal is a pulse having a pulse width of 2 ms if the test function of the ATF sensor is normal. On the other hand, if it is abnormal, the pulse has a pulse width of 4 ms.
[0053]
Next, at step 104, the CPU 25 determines whether or not there is a falling “↓” edge detection and permission of the pulse waveform signal. Next, in step 105, when the detection circuit 29 receives a pulse waveform signal based on the control command CM1 from the ATF sensor and detects a falling edge for the pulse waveform signal, this detection circuit 29 29 outputs a code to that effect to the CPU 25 (for example, an interrupt code). When the CPU 25 receives the code from the detection circuit 25 and confirms permission of the falling “↓” edge detection for the pulse waveform signal, the CPU 25 proceeds to the next step 105.
[0054]
In step 105, the CPU 25 starts measuring the pulse width time for the pulse waveform signal. This measurement uses, for example, a counter or a timer. Next, in step 106, the CPU 25 sets and permits the detection of the rising “↑” edge of the pulse waveform signal.
[0055]
Next, in step 107, the CPU 25 performs processing related to signal transmission with the fire receiver 10. In other words, the CPU 25 performs processing other than “measurement of pulse width time”, and is not limited to the processing of the receiver, but is an operation for itself such as input / output processing not described in detail or display processing. May be.
[0056]
The repeater 20 performs processing in the order of steps 101, 104, 108, and 107. The repeater 20 repeats the above processes (steps 101, 104, 108, and 107) from the time when the falling edge is detected until the time when the next rising edge is detected.
[0057]
Then, the process proceeds to steps 101 and 104. In step 108, the CPU 25 determines whether or not the rising “↑” edge of the pulse waveform signal is detected and permitted.
[0058]
In step 109, when the detection circuit 29 detects a rising edge of the pulse waveform signal from the ATF sensor 30, the detection circuit 29 outputs a code (for example, an interrupt code) to that effect to the CPU 25. . When the CPU 25 receives a code (for example, an interrupt code) from the detection circuit 29 and confirms permission to detect the rising “↑” edge for the pulse waveform signal, the CPU 25 proceeds to the next step 109.
[0059]
In step 109, the CPU 25 ends the time measurement for the pulse width. With this end, the CPU 25 stores, for example, the measured counter value and resets the counter value.
[0060]
Next, in step 110, the CPU 25 determines the state (abnormal or normal) of the sensor 30 based on the pulse width measurement time. The CPU 25 determines that the pulse width measurement time is normal when it is 2 ms, and determines that it is abnormal when it is 4 ms. Thereafter, the process proceeds to step 107.
[0061]
FIG. 11 is a timing chart showing operations of the detection circuit 29 and the CPU 25 of the repeater 20 of FIG. FIG. 11A shows a pulse waveform signal detected by the detection circuit 29, and FIG. 11B shows a state of the CPU 25. FIG. The CPU 25 is in an active state when the detection circuit 29 detects a falling edge and a rising edge of the pulse waveform signal, and is in an idle state in other cases. For example, the edge interval from the falling edge to the rising edge of the pulse waveform signal is 2 ms or 4 ms (see FIG. 9B). The pulse width in the active state is several hundred microseconds, for example.
[0062]
As described above, when the CPU 25 receives the pulse waveform signal and detects the falling edge of the pulse waveform signal, the CPU 25 senses the period between the detection of the falling edge and the detection of the next rising edge. It is possible to execute processing different from processing related to monitoring of the state of the device (for example, measurement of pulse width time, determination of the state of the sensor).
In the case of the repeater 20 as described above, when the call from the fire receiver 10, the ATF sensor, the edge detection operation for transmission, etc. are completely duplicated, the response to the fire receiver 10 has priority. Is done. This is because the transmission on the fire receiver 10 side transmits and receives the fire signal, so that the operation that leads to the delay is prevented. The transmission on the ATF sensor side is only related to the collection of automatic test information. The fire signal of the sensor can be detected independently of transmission based on the switching action.
[0063]
As described above, when receiving a pulse waveform from a certain monitoring control device, the receiving device of the fire receiver 10 or the repeater 20 detects the start point of the pulse waveform (for example, the falling edge of the pulse), and It is possible to monitor the waveform only at the end point (for example, the rising edge of the pulse) determined from the start point and perform another processing operation in the period from the start point to the end point. Thereby, the processing capacity of the fire alarm facility can be improved. For example, in the repeater 20 with a test function, when monitoring the “high” or “low” level of the pulse code for signal transmission, only the both end portions (falling and rising edges of the pulse) are monitored. Thus, another process (a process other than the state monitoring) can be performed in the middle (between the falling edge and the rising edge of the pulse).
[0064]
Further, this receiving device is a repeater 20, and performs trunk line transmission with the fire receiver 10 via the transmission line L11, and between the monitoring control equipment via the sensor line (signal line) L21. The branch is transmitted at. Thereby, the repeater 20 can transmit between the fire receivers 10, for example, while monitoring the sensor 30.
[0065]
Furthermore, since the transmission code (for example, control command CM1) indicated by the pulse waveform is determined by the pulse width, monitoring according to the control content can be performed.
[0066]
Still further, the monitoring and control device is a sensor 30 including an ATF sensor, and the ATF sensor 30 transmits a fire signal by a switching operation and transmits an abnormal signal based on a test function by signal transmission with a receiving device. To do. Thereby, the receiving apparatus can monitor the operating state of the ATF sensor 30.
[0067]
【The invention's effect】
As described above, since the receiving apparatus can perform a process different from the monitoring control process while performing a predetermined monitoring control process when receiving the pulse waveform signal based on the control command, The processing capacity of the fire alarm facility can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a fire alarm facility according to Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a connection example between a repeater and a detector of the fire alarm facility according to Embodiment 1 of the present invention.
FIG. 3 is a diagram showing a detailed configuration of a repeater of a fire alarm facility according to Embodiment 1 of the present invention.
FIG. 4 is a time chart showing an example of polling between the repeater and the fire receiver of the fire alarm facility according to Embodiment 1 of the present invention.
FIG. 5 is a time chart showing point polling between the repeater and the fire receiver of the fire alarm facility according to Embodiment 1 of the present invention;
FIG. 6 is a time chart showing selecting between the repeater of the fire alarm facility and the fire receiver according to the first embodiment of the present invention.
FIG. 7 is a flowchart showing the operation of the fire receiver of the fire alarm facility according to Embodiment 1 of the present invention.
FIG. 8 is a waveform diagram showing an example of signal transmission between the repeater and the ATF sensor of the fire alarm facility according to Embodiment 1 of the present invention.
FIG. 9 is a diagram showing the relationship between the address and slot of signal transmission between the repeater and the ATF sensor of the fire alarm facility according to Embodiment 1 of the present invention, and pulses representing normality and abnormality.
FIG. 10 is a flowchart showing the operation of the repeater of the fire alarm facility according to Embodiment 1 of the present invention.
FIG. 11 is a timing chart showing the operation of the detection circuit of the repeater and the CPU of the fire alarm facility according to Embodiment 1 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fire receiver, 20 repeater, 21 Transmission constant voltage circuit, 22 Reception circuit, 23 Transmission circuit, 24a, 24b Photocoupler, 25 CPU, 26 Control constant voltage circuit, 27 Monitoring circuit, 28 Output circuit, 29 Detection Circuit, 30 sensor, 40 termination resistor, L11 transmission line, L21 sensor line, P1 power line.

Claims (1)

A plurality of terminal devices are connected to one transmission line from the fire receiving unit, and one of the terminal devices is a repeater with a test function. One or more tests are performed on a sensor line from the repeater with the test function. In a fire alarm facility in which a sensor with a function is connected and the fire receiving unit monitors and controls each terminal device individually,
The sensor with the test function transmits a pulse waveform signal representing the state of the sensor with the test function to the repeater with the test function based on a control command of the relay with the test function ,
Said test function repeater while receiving a pulse waveform signal from said test function detector, on the basis of the pulse waveform signal, the fire alarm for executing processing relating to condition monitoring of the test function detector Equipment,
The repeater with the test function is
When the start point of the pulse waveform signal is detected while receiving the pulse waveform signal, the sensor with the test function determines whether it is normal or abnormal according to the interval from the start point to the end point determined. And the process regarding signal transmission with the said fire receiving part is performed in the middle of the said interval .

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