JPH06274783A - Disaster prevention monitor - Google Patents

Abstract

PURPOSE:To improve the reliability of the disaster prevention monitor. CONSTITUTION:A confirmation command transmission means 32A judging whether or not a response from a terminal 11 comes to a reception means 10, confirmation command transmission means 32B sending a confirmation command to the terminal, 1st fault display control means 32C displaying the type of fault, and 2nd fault display control means 32D displaying the prescribed fault when no response comes when no response comes and after the prescribed polling cycle are provided. A no-response means 44A making no response for a calling by the address specification in detecting a fault and fault signal transmission means 44B sending the fault signal are provided on the terminal 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention monitoring apparatus for collecting terminal information by a call from a receiving side and centrally monitoring a failure such as a disconnection.

[0002]

2. Description of the Related Art Conventionally, as this type of disaster prevention monitoring device,
For example, the one disclosed in Japanese Patent Laid-Open No. 1-159797 is known. In this disaster prevention monitoring device, the receiver outputs a command to acquire terminal information to all fire sensors, and each fire sensor detects the detection amount related to the fire phenomenon when it receives the command to acquire the information from the receiver. After that, the information held in the terminal was collected by polling from the receiver.

When a terminal has a failure such as a disconnection, a failure signal is sent to the receiver. Also, on the transmission line, for example, when transient noise generated when the fluorescent lamp is turned on is superimposed,
Since the receiver cannot decode the signal from the terminal, the failure of the transmission line is notified by the display means.

[0004]

However, in such a conventional disaster prevention monitoring device, when noise is superposed on the transmission line, the failure is indicated by the display means, so that the managing side has a problem. In spite of the transient noise, it is necessary to take measures, and there is a problem that reliability is lowered.

The present invention has been made in view of the above-mentioned conventional problems, and does not immediately perform display based on the determination of a fault when a transient noise is superimposed. Therefore, it is intended to increase the reliability of the device.

[0006]

FIG. 1 is a diagram for explaining the principle of the present invention. The present invention is intended for a disaster prevention monitoring device that collects terminal information by making a call from the receiving means 10 to the terminal 11 and determines whether the receiving means 10 has received a response from the terminal 11. Response determining means 32A, a confirmation command sending means 32B for sending a confirmation command to confirm the type of failure to the terminal when there is no response, and a first failure for displaying the failure type when there is a response to the failure signal. The display control means 32C and the second failure display control means 32D for displaying a predetermined failure when there is no response again and no response even after a predetermined polling cycle, are provided in the terminal 11, and the failure is detected and addressed. When the non-responding means 44A which does not respond to the designated call and the confirmation command for confirming the type of the failure are received from the receiving means 10, the failure signal is sent out. That fault signaling means 4
4B is provided.

In the present invention, the terminal 11 is a repeater 14 connected to the transmission line from the receiving means 10 and a detector connected to the line from the repeater 14 for detecting an abnormality such as a fire. It is characterized in that the repeater 14 is provided with the non-responsive means 44A and the fault signal sending means 44B. Further, the present invention is characterized in that the fault signal includes fault information such as disconnection of the transmission line, disconnection of the line, and short circuit.

The present invention is also characterized in that the terminal 11 is an analog sensor connected to the receiving means 10 and provided with the non-responsive means 44A and the fault signal sending means 44D. The present invention also provides the receiving means 10
Is composed of only a receiver, and the terminal 11 is connected to the receiver.

Further, according to the present invention, the receiving means 10 is composed of a receiver and one or a plurality of relay boards as local receivers connected to a transmission path from the receiver. It is characterized in that the terminal 11 is connected to. Further, the present invention is characterized in that the receiving means 10 is composed only of a relay board as a plurality of local receivers connected to each other by a transmission path, and the terminal 11 is connected to each of the relay boards. .

[0010]

In the disaster prevention monitoring apparatus of the present invention having such a configuration, when a failure occurs in the terminal 11 including the transmission line,
The terminal 11 which has detected the failure controls the response to the call by the address specification from the receiving means 10, and when the receiving means 10 determines the no response from the terminal 11, the failure confirmation for confirming the type of the failure is performed. A command is sent to the terminal 11, a failure signal is sent to the receiving means 10 in response to the failure confirmation command, the receiving means 10 discriminates and displays the type of the failure by the failure signal, and a failure confirmation command is sent. However, if there is no response again and if there is no response even after the prescribed all address polling period has elapsed, the failure of the transmission line is displayed. Is not displayed and it is not necessary to take measures against noise, so that the reliability of the device can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is an explanatory view showing the overall construction according to an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes a receiver, and a relay 14 as a terminal, an analog smoke detector 16, an analog heat detector 18, and a control relay 20 are connected to a transmission line 12 drawn from the receiver 10. There is. A sensor line 22 is drawn out from the repeater 14, and an on / off sensor 24 is connected to the sensor line 22. Further, the detector line 22 is also provided with a transmitter 26 that sends out a fire signal by operating a switch.

On the other hand, the receiver 10 is provided with a control section 32 using a CPU, and for the control section 32, a display section 34,
Operation unit 36, ringing unit 3 for outputting an alarm or a voice message
8 and a power supply unit 40 are provided. The control unit 32 of the receiver 10 performs polling for collecting terminal information by calling with an address on the terminal side specified. In the embodiment of FIG. 2, the repeater 1 for the on / off sensor is provided on the transmission line 12.
4, different terminals such as the analog smoke sensor 16, the analog heat sensor 18 and the control relay 20 are connected, but they all have the same function as the relay for the call command from the receiver 10, and When viewed from the receiver 10, a series of terminal addresses are set for each terminal on the transmission line 12, and for example, addresses 127 of addresses 1 to 127 are used.

The control unit 32 of the receiver 10 includes a response determining means 32A for determining whether or not there is a response from the terminal, and a confirmation command transmitting means for transmitting to the terminal a confirmation command for confirming the type of failure when there is no response. 32B, a first fault display control means 32C for displaying the fault type when there is a response of a fault signal, and a fault of the transmission line 12 when there is no response again and no response is made after a predetermined total polling period. It has each function as the 2nd failure display control means 32D which displays.

That is, the control unit 32 determines a response from the terminal, sends a fault confirmation command when there is no response, and transmits a fault signal to the fault confirmation command when there is a fault signal. Is displayed and displayed on the display unit 34. On the other hand, when the failure confirmation command is sent, but there is no response and no response even after the predetermined polling period, it is determined that a failure of the transmission line 12 or a failure of the terminal itself has occurred, and the display unit 34 Is displayed.

For example, when the polling call is made twice and there is no response, that is, when there is no response even after 7 seconds have elapsed,
It is determined that a failure of the transmission line 12 or a failure of the terminal itself has occurred. As a result, it is possible to cope with a failure caused when a transient noise is superimposed. Next, FIG. 3 is a time chart showing a normal calling operation performed between the receiver 10 of FIG. 2 and the terminal side, for example, the repeater 14.

In FIG. 3, the receiver 10 sequentially transmits a calling signal including a calling command C1 and terminal addresses A1, A2, A3, .... As shown in FIG. 4, the calling signal is composed of an 8-bit command field, an 8-bit address field, and an 8-bit checksum field, which are three bytes. Also,
A start bit, a parity bit and a stop bit are provided before and after each byte. The command field stores command data indicating what the calling signal from the receiver 10 means to each terminal, regardless of the address. In the present invention, in addition to the command data for normal call response, for example, a fault confirmation command is set and used to confirm the type of fault.

FIG. 5 shows the transmission format of the response signal from the terminal, which has an 8-bit data field and an 8-bit data field.
It is composed of 2 bytes of a bit checksum field, and a start bit, a parity bit and a stop bit are provided before and after each byte. Of course, the configuration of the transmission format of the call signal from the receiver and the call signal from the terminal used in the present invention can be appropriately configured as necessary.

Next, FIG. 6 is a circuit block diagram showing an embodiment of the repeater 14 used in the on / off sensor 24 shown in FIG. In FIG. 6, the relay 14 is provided with a control circuit 42. The control circuit 42 includes a CPU 44, R
A memory 46 using AM or the like, and an AD conversion unit 48 are provided. A transmission / reception circuit 50 and an address setting circuit 54 are provided for the CPU 44 of the control circuit 42.
The transmission / reception circuit 50 receives the calling signal from the receiver 10 in the voltage mode and supplies it to the CPU 44, and sends the response signal from the CPU 44 to the receiver 10 in the current mode. The transmission / reception circuit 50 is provided with a transmission indicator lamp 52 that is turned on when transmitting / receiving data bit 1 and turned off when it is 0.

The address setting circuit 54 uses the address setting switch 56 such as a DIP switch to allow the CPU 4 to operate.
A predetermined terminal address is set for 4. In the address setting by the address setting circuit 54, a group address when the plurality of repeaters 14 are grouped is also set in addition to the unique self-address. The AD converter 48 provided in the control circuit 42 has a plurality of input ports indicated by numbers 1, 2, ... N. As the number of detectors corresponding to the input ports 1 to n of the AD converter 48, for example, the on / off sensor 26 or the transmitter 24 can be externally connected. In this embodiment, one transmitter 26 which is finally connected to the on / off sensor 24 is shown, and the on / off sensor 24 is connected to the input ports 1, 2 ,.
-1), and the last transmitter 26 corresponds to the input port n.

The CPU 44 of the control circuit 42 has a function as a non-responsive means 44A and a fault signal sending means 44B. That is, the CPU 44 sends no-response means 44A that does not respond to a call by addressing when a failure is detected, and a failure signal that sends a failure signal when a confirmation command for checking the type of failure is received from the receiver 10. Delivery means 44B is provided.

When a failure occurs in a terminal including the transmission path 12, for example, the on / off sensor 24, the repeater 14 which detects this failure does not respond to the call by the address from the receiver 10. When a failure confirmation command is sent from the receiver 10 due to this non-response, a failure signal indicating the type of the failure is sent to the receiver 10. On the other hand, a signal line terminal S, a sensor line terminal V, a confirmation response line terminal AA for the transmitter 26, and a common terminal SC are provided on the transmission path 12 side of the repeater 14 with respect to the receiver 10. Therefore, the receiver 1
Four lines will be connected to 0. A diode D2 and a zener diode ZD2 are provided following the signal line terminal S and the common terminal SC, and a constant voltage circuit 58 is further provided.

The constant voltage circuit 58 outputs a power supply voltage for the control circuit 42 side, for example, + 3.2V. Further, a diode D1 and a Zener diode ZD1 are provided following the sensor line terminal V, and a constant voltage circuit 60 is further provided. The constant voltage circuit 60 is a power supply voltage required for the externally connected on / off sensor 24 and the transmitter 26, for example, 20
Output V. Following the constant voltage circuit 60, a fire disconnection detection circuit 64 and a test circuit 66 are individually provided via the diode D3 corresponding to the on / off sensor 24 and the transmitter 26, respectively.

A step-up voltage of the step-up circuit 62, for example, 35 V is supplied to the fire breakage detection circuit 64. The booster circuit 62 is temporarily operated when the CPU 44 performs the data sampling process, and detects the boosted voltage of 35V higher than the normal power supply voltage 20V for the on / off sensor 24 and the transmitter 26 via the fire disconnection detection circuit 64. Applied as operating voltage.

The on / off sensor 24 has a resistor R2 connected in parallel to the series circuit of the alarm indicator lamp 68 and the resistor R1 and further has a sensor contact 70 connected to the parallel circuit. The detector contact 70 is composed of a mechanical switch contact in a diaphragm type heat detector and a switching means such as a thyristor triggered by a fire detection signal in a smoke detector or a heat detector.

A terminator 72 is connected to the terminal of the on / off sensor 24. The terminator 72 has a Zener diode ZD3, a resistor R0 and a Zener diode ZD4 connected in series. The Zener diodes ZD3 and ZD4 are connected to the terminating resistor R0 in opposite directions so that one of them functions even if the connection polarities are switched. The Zener diodes ZD3 and ZD4 are non-conducting at the output voltage 20V of the constant voltage circuit 60 at the normal time when data sampling is not performed, and the Zener voltage is conducting when receiving the output voltage of the booster circuit 62 that performs data sampling, for example, 35V. I am trying.

On the other hand, the transmitter 26 corresponding to the input port n of the AD converter 48 has a switch contact 76 which is turned on by a push button operation, a switch contact 78 which is closed in conjunction with the switch contact 76, and a terminator 72. The switch contact 76 is connected to the sensor line 22 from the fire break detection circuit 64. On the other hand, the signal line from the response confirmation terminal AA of the repeater 14 is pulled in and connected to the switch contact 78 via the confirmation indicator lamp 74 and the resistors R3 and R4.

Fire detection information is transmitted to the receiver 10 by the interrupt from the control circuit 42 to the confirmation response terminal AA of the repeater 14 based on the fire detection signal of the transmitter 26.
Acknowledgment signal when the receiving operation is performed on the 0 side Acknowledge terminal A
The voltage is supplied to A, and specifically, the voltage is supplied, and thereby the confirmation indicator lamp 74 is turned on. Furthermore, the test circuit 66 provided corresponding to the on / off sensor 24 and the transmitter 26 sequentially operates when a test command is operated by operating a test switch in the receiver 10 or the repeater 14 or a call signal from the receiver 10. The test can be performed by activating and shorting the sensor lines to create the same simulated fire detection condition as the activating sensor contact 70 or transmitter switch contact 76.

Reference numeral 80 denotes a control voltage monitoring circuit for monitoring the voltage boosted by the booster circuit 62. By monitoring the boosted voltage, it is determined whether or not a predetermined voltage is supplied from the power line of the transmission line 12. To do. If the power supply line is broken or short-circuited, no voltage is supplied, so that a failure of the transmission line 12 is judged. . Next, FIG. 7 is a block diagram showing an embodiment of the analog smoke sensor 16 shown in FIG.

In FIG. 7, the analog smoke sensor 16 comprises a sensor body 16a and a sensor base 16b.
The sensor main body 16a is provided with a rectifier circuit 84, a noise absorption circuit 86, and a transmission signal detection circuit 88 for making the connection polarity nonpolarized from the base side. The transmission signal detection circuit 88 detects the calling signal in the voltage mode from the receiver 10 and supplies it to the transmission control circuit 92.

Address information and type information from the address / type setting circuit 94 are set in the transmission control circuit 92. This transmission control circuit 92 has the same function as the control circuit 42 of the repeater 14 shown in FIG. That is, when a failure is detected, the failure signal is sent to the receiver 10 when the failure confirmation command is received from the receiver 10 without responding to the addressing call from the receiver 10.

For smoke detection, the LED drive circuit 96 and infrared LED are used.
98, the light receiving circuit 100, and the amplifier circuit 102. Further, a test LED 106 for test operation is also provided. The LED drive circuit 96 receives the data sampling command from the receiver 10 by the transmission control circuit 92, then drives the infrared LED to emit light, and AD the smoke detection signal obtained through the light receiving circuit 100 and the amplifying circuit 102. The data is converted into digital detection data and stored in the memory. When the transmission control circuit 92 receives a test command from the receiver 10, the test LED 106 is driven to emit light to perform a functional test.

That is, the test L is directly applied to the light receiving circuit 100.
The test light from the ED 106 is made incident so that a pseudo fire is detected. At this time, the light receiving circuit 100 and the amplifier circuit 10
If the smoke detection signal obtained through 2 is in the specified range, it is normal, and if it is outside the specified range, it is judged as a failure. Here, there are two types of faults, a false alarm fault when the smoke detection signal is below the lower limit of the specified range and a false alarm fault when the smoke detection signal is above the upper limit when the test LED 106 is illuminated. Specifically, when the smoke detection signal falls below the lower limit of the specified range, it is due to dirt on the light receiving circuit 100, for example, the light receiving LED or a failure of the light receiving circuit 100 itself, resulting in a failure to report the actual fire and smoke. When the detection signal exceeds the upper limit of the specified range, the sensitivity is too high, and a false alarm is likely to occur in the actual fire, and the transmission control circuit 92 of the analog smoke sensor 16 is likely to occur.
Determines the types of these disorders. The smoke detection structure by the infrared LED 98 and the light receiving circuit 100 is usually a scattered light type.

The response signal from the transmission control circuit 92 is given to the response signal output circuit 104, and the receiver 10 is set in the current mode.
Signal is sent to. It should be noted that the transmission circuit 92 and thereafter operate by receiving a constant voltage supply from the constant voltage circuit 90. Furthermore,
A warning indicator lamp circuit 108 is provided on the sensor base 16b to turn on the warning indicator lamp exposed to the outside when a fire is detected.

Next, FIG. 8 is a flow chart showing the processing operation by the control unit 32 provided in the receiver 10 of FIG. First, when the power of the receiver 10 is turned on, step S
At 1, predetermined initialization is performed. Then, in step S2, the sensor address n for polling is set to the first address n = 1. Then step S
In step 3, the on / off sensor 24 at the address n is polled, and in step S4, a response is waited for.

If there is a response in step S5, step S
Proceed to step 6 to determine whether a fire has occurred. When no fire has occurred, the process proceeds to step S8, and when a fire has occurred, fire processing is performed in step S7. As a fire process, a fire is displayed on the display unit 34, the bell is rung by the ringing unit 38, and the necessary control load 30 is driven.

If the response is a normal signal, step S
At 8, the count number is set to Xn = 0. That is, Xn = 0 is set for each address n. Next, in step S9, it is checked whether or not the maximum sensor address n = 127 has been reached. If not, the sensor address n is incremented by 1 in step S10, and in step S3 the next The polling for the sensor address n is repeated. When the polling has been reached, the process returns to step S1 and the sensor address n is set to n = 1.

If there is no response from the repeater 14 in step S5, the flow advances to step S11 to send a failure confirmation command to the repeater 14, and waits for a failure response from the repeater 14 in step S12. Then, in step S13, the repeater 14
It is determined whether or not there is a failure response from the above. If there is no failure response, the process proceeds to step S15, and if there is a failure response, the process proceeds to step S14.

In step S14, the fault signal from the repeater 14 is processed. That is, the type of failure is determined and the content is displayed on the display unit 34. Since the address of the repeater 14 can be known, it is preferable to display the address or district information corresponding to the address, for example, "3F conference room", together with the content of the failure. The failure signal may be a disconnection signal of the sensor line 22 in the repeater 14, or
The disconnection signal of the confirmation response line of the transmitter 26 is included. Also,
The analog smoke sensor 16 includes the above-mentioned false alarm failure and false alarm failure. After processing the fault signal, the process proceeds to step S9 to check whether or not the maximum sensor address n = 127 has been reached.

When there is no failure response from the repeater 14 in step S13, the process proceeds to step S15 and the count number X
It is determined whether n has reached a predetermined value Z. As the value of Z, polling is performed twice for all addresses 127,
It is set in advance as "1" for two consecutive transmissions, "2" for three consecutive transmissions, "3" for four consecutive transmissions, and the like. Here, Z = 1. When Z = 1, since two consecutive transmissions are made, it takes 7 seconds in time, and this time is enough time to judge whether or not it is a fault due to transient noise.

If there is no failure response in step S13,
Since Xn <Z in step S15, step S16
Then, the count number Xn is incremented by 1 to "1". Then, in step S9, all addresses n are polled for one round, and then the same address n is polled. During this period, when the trouble due to the transient noise disappears, a normal signal is returned in step S5, and the count number Xn is set to zero again in step S8.

After that, if there is no response in step S5 even in the second lap and there is no failure response in step S13,
In step S16, Xn (1) = Z (1). In this case, no response processing is performed in step S17. That is, in the case of no response twice, and when there is no response even after the predetermined polling period, it is determined that a failure has occurred in the transmission line 12 or in the repeater 14 itself, A predetermined fault is displayed on the display unit 34. As for the display form, for example, "no response fault" is displayed together with the address or district information corresponding to the address.

Next, FIG. 9 is a flow chart showing the processing operation of the terminal taking the repeater 14 used in the on / off sensor shown in FIG. 6 as an example. First, when the power is turned on, predetermined initialization is performed in step S21, and step S21 is performed.
At 22, the address set by the address setting circuit 54 is checked, and the address is fetched and stored in the memory 46.

Then, in step S23, it is determined whether or not a fire has occurred. If a fire has occurred, fire processing is performed in step S24. That is, the fire signal is transmitted to the receiver 10. When no fire has occurred, it is determined in step S25 whether or not a failure has occurred, and when a failure has occurred, the process proceeds to step S26. In step S26, it is determined whether or not the polling for the own address is received, and when the polling for the own address is received, a non-response process in which no response is made is performed in step S27.

Next, in step S28, it is determined whether or not a fault confirmation command for the own address has been received. If the failure confirmation command is not received, step S
Returning to step 22, the address is checked, and when the fault confirmation command is received, the fault signal indicating the type of fault occurring in step S29 is transmitted to the receiver 10.

As described above, in the receiver 10, the repeater 14
If there is no response from the device after 2 times, and there is no response even after the predetermined polling period, it is determined that a failure has occurred in the transmission line 12 or the relay 14 itself, and these are displayed. Therefore, when transient noise is superimposed, the failure is not displayed. Therefore, it is not necessary to deal with transient noise, and reliability can be improved. The repeater 14
In the fault detection, the test operation is performed by the test command from the receiver 10 that emits light periodically, and the fault detection process is performed at the time of polling call.

The processing operation of the analog smoke detector 16 is the same as the flow of the repeater 14. In the embodiment of FIG. 2, the case where only the receiver 10 is provided as the receiving means in the principle explanatory diagram of FIG. 1 is taken as an example, but as another embodiment of the present invention, the receiving means 10 is (1) A configuration in which a receiver and a relay board that functions as a local receiver are connected to the transmission path from the receiver, and a terminal is connected to the transmission path from the relay board (2) Only the relay board as the local receiver It can be applied as is to any of the configurations in which terminals are connected to the transmission paths from each relay board by connecting with multiple transmission paths.

[0047]

As described above, according to the present invention, when a failure occurs in a terminal including a signal line, the terminal performs a non-responsive process for a call from the receiving means, and the receiving means does not respond. If so, a fault confirmation command is sent, the terminal that receives the fault confirmation command returns a fault signal indicating the fault type, the receiving means displays the fault type, and it is a response again, after a predetermined total polling cycle. When there is no response,
Since the failure of the transmission path is displayed, the failure due to the transient noise is not displayed, and it is not necessary to deal with the transient noise. As a result, the reliability of the device can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention.

FIG. 2 is an explanatory diagram showing an overall configuration according to an embodiment of the present invention.

FIG. 3 is a time chart showing polling.

FIG. 4 is an explanatory diagram of a transmission format of a calling signal from a receiver.

FIG. 5 is an explanatory diagram of a transmission format of a response signal from the terminal.

FIG. 6 is a block diagram of an embodiment of a repeater used for an on-off sensor.

FIG. 7 is a block diagram showing an embodiment of an analog sensor.

FIG. 8 is a flowchart showing a processing operation on the receiver side.

FIG. 9 is a flowchart showing the processing operation on the repeater side.

[Explanation of symbols]

 10: Receiver (Reception Means) 11: Terminal 12: Transmission Line 14: Repeater 16: Analog Smoke Detector 16a: Detector Main Body 16b: Detector Base 18: Analog Heat Detector 20: Control Repeater 22: Sensing Device line 24: ON / OFF sensor 26: Transmitter 28: Control line 30: Control load 32: Control section 32A: Response determination means 32B: Confirm command sending means 32C: First failure display control means 32D: Second failure display control means 34: display unit 36: operation unit 38: ringing unit 40: power supply unit 42: control circuit 44: CPU 44A: no-response unit 44B: fault signal sending unit 46: memory 48: AD conversion unit 50: transmission / reception circuit 52: transmission display Light 54: Address setting circuit 56: Address setting switch 58, 60: Constant voltage circuit 62: Booster circuit 64: Fire breakage detection circuit 66: Test Route 68: Warning indicator light 70: Sensor contact 72: Terminator 74: Confirmation response indicator light 76, 78: Switch contact 80: Control voltage monitor circuit 84: Rectifier circuit 86: Noise absorption circuit 88: Transmission signal detection circuit 90 : Constant voltage circuit 92: Transmission control circuit 94: Address / type setting circuit 96: LED drive circuit 98: Infrared LED 100: Light receiving circuit 102: Amplifying circuit 104: Response signal output circuit 106: Test LED 108: Warning indicator lamp circuit

Claims (7)

[Claims] 1. A disaster prevention monitoring device for collecting terminal information by calling an address from a receiving means to a terminal, and a response determining means for determining whether the receiving means has received a response from the terminal. , A confirmation command transmitting means for transmitting a confirmation command for confirming the fault type to the terminal when there is no response, a first fault display control means for displaying the fault type when a fault signal is returned, A second fault display control means for displaying a predetermined fault when a response is not received even after a predetermined total polling period is provided, and when the fault is detected, the second device does not respond to a call by addressing. The protection means is provided with a response means and a failure signal sending means for sending a failure signal when a confirmation command for checking the type of failure is received from the receiving means. Monitoring equipment. 2. The disaster prevention monitoring device according to claim 1, wherein the terminal is connected to a repeater connected to the transmission path from the receiving means, and is connected to a line from the repeater to detect an abnormality such as a fire. A disaster prevention monitoring apparatus comprising a relay device, wherein the repeater is provided with the non-responsive means and the fault signal sending means. 3. The disaster prevention monitoring apparatus according to claim 1 or 2, wherein the failure signal includes failure information such as disconnection of the transmission path, disconnection of the line, and short circuit. 4. The disaster prevention monitoring apparatus according to claim 1, wherein the terminal is an analog sensor connected to the receiving means and provided with the non-responsive means and fault signal sending means. Disaster prevention monitoring device. 5. The disaster prevention monitoring device according to claim 1, wherein the receiving means is composed of only a receiver, and the terminal is connected to the receiver. 6. The disaster prevention monitoring device according to claim 1, wherein the receiving means comprises a receiver and one or a plurality of relay boards as a local receiver connected to a transmission path from the receiver. A disaster prevention monitoring device, characterized in that the terminal is connected to each of the relay boards. 7. The disaster prevention monitoring device according to claim 1, wherein the receiving means is composed only of relay boards as a plurality of local receivers connected to each other by a transmission path, and each of the relay boards is provided with the relay board. A disaster prevention monitoring device characterized by connecting a terminal.