JPH07272168A - Repeater and fire signal receiver for fire alarm equipment - Google Patents

Abstract

PURPOSE:To reduce the voltage drop of a signal wire connecting a fire signal receiver and a terminal equipment at the time of switching on power source by waiting the reset of a latch relay by a prescribed time corresponding to the own address of a repeater. CONSTITUTION:The repeater T is provided with MPU (microprocessor) 110, ROM 111, EEPROM 120, RAM 121 and 122, a transmission and reception part 133, its interface 133a, latch relays RT1 to RT4, intermittence and short circuit detection circuits DT1 to DT4 and a power supply circuit 140. When power source to the repeater T is switchied on, the reset of each latch relay RT1 to RT4 is waited by a prescribed time corresponding to the own address of the repeater T from the throwing of power source and after the prescribed time has passed, the reset of the latch relays RT1 to RT4 is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fire receiver and a terminal device connected to each other via a signal line, and the fire receiver calls the terminal device by polling to collect predetermined information and perform predetermined control. The present invention relates to a fire alarm equipment terminal device and a fire receiver.

[0002]

2. Description of the Related Art In a conventional fire alarm system, a fire receiver and a plurality of terminal devices are connected by a signal line, different addresses are given to each of the plurality of terminal devices, and the fire receiver is connected via this address. However, a method (so-called polling method) of collecting information from a specific terminal device and sending a control command to the specific terminal device is known.

Examples of the above-mentioned terminal equipment include a fire detector, a repeater, etc. These terminal equipment include a memory storing its type, an address, etc., and an MPU (microprocessor) for controlling the entire terminal equipment. ) Is provided.

[0004]

SUMMARY OF THE INVENTION In the above conventional example,
Initialization is performed to enable the operation of the MPU when the terminal device is powered on. As this initial setting,
For example, there is a peripheral check such as turning off of the starting circuit.

In this case, all the terminal equipments perform the initial setting at the same time, and all the fire detectors and the like connected to the repeater are initialized at the same time, so that the power consumption of the fire receiver for supplying power to the terminal equipments is reduced. Larger, the larger the number of terminal devices connected to the fire receiver, the larger the current flowing in the signal line, the greater the voltage drop of the signal line,
This causes a problem that transmission failure may occur.

In order for the fire receiver to control the controlled equipment such as smoke prevention equipment, a latch relay is provided in advance in the fire receiver, the controlled equipment is connected to this latch relay, and the latch relay is set and reset. By doing so, the controlled device is activated and restored. Specifically, in order to restore the controlled device, a reset signal is output from the output port of the MPU, and the latch relay is reset by this reset signal. In this case, the reset signal from the MPU is a signal of the same system as the signal line, and the signal that activates the latch relay is a signal of the same system as the power supply line, and it is preferable to insulate these signals from each other. ,
A photocoupler is provided between the reset signal from the MPU and the signal that resets the latch relay. In order to drive this photo coupler, for example, 3
It is necessary to flow a current of 0 mA, that is, 30 mA as a reset pulse from the output port of the MPU, and when resetting many latch relays at the same time,
The more latch relays to reset, the greater the voltage drop on the signal line.

The above problem occurs not only when the fire receiver is used, but also when another fire receiver such as a repeater is turned on.

It is an object of the present invention to provide a repeater for a fire alarm system which can reduce the voltage drop of the signal line connecting the fire receiver and the terminal equipment when the power is turned on.

It is another object of the present invention to provide a fire receiver capable of reducing the voltage drop of the signal line connecting the fire receiver and the terminal equipment when the power is turned on.

[0010]

According to the present invention, a fire receiver and a terminal device are connected via a signal line, the fire receiver calls the terminal device by polling, collects predetermined information, and performs predetermined control. In a repeater of fire alarm equipment that executes the above, when the repeater is provided with a latch relay and the power is turned on, the latch is latched for a predetermined time according to the self-address of the repeater from this power-on. It waits for the resetting of the relay, and starts the resetting of the latch relay after the lapse of the predetermined time.

[0011]

When the relay is powered on, the present invention waits for a reset of the latch relay for a predetermined time corresponding to the self-address of the relay after the power is turned on, and after the predetermined time has elapsed, the latch relay is reset. Since the reset is started, it is possible to reduce the voltage drop of the signal line connecting the fire receiver and the terminal device when the power is turned on.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the polling selecting method used in the present invention will be briefly described. In the polling selecting method, the terminal devices connected to the fire receiver are divided into a plurality of groups in advance, and when called from the fire receiver, only the terminal device whose state has changed responds. . The response timing differs between system polling and point polling. In system polling, the response timing of terminal devices differs for each group, and for point polling, the response timing differs for each terminal device. If there is no response by system polling, the state of all terminal devices has not changed at all, and if there is a response by system polling, the state of one of the terminal devices belonging to the group that made the response has changed. , Point poll the terminal devices belonging to the group.

FIG. 1 is a block diagram showing a fire receiver RE which is an embodiment of the present invention.

The fire receiver RE includes an MPU (microprocessor) 10, ROMs 11 to 13, and RAMs 21 to 2
9, an operation unit 31, a display unit 32, a fire and fire receiver 33
And these IFs 31a to 33a. In addition, the fire receiver RE is a latch relay RR1, RR2, RR
3, RR4, disconnection and short circuit detection circuits DR1 to DR4,
And a power supply circuit 40.

The ROM 11 is a storage area for programs such as the flowchart shown in FIG.
Is a storage area for a terminal device map table that stores each address of the terminal devices such as the fire detector SE, the relay T, the transmitter, and the ID such as the type of the terminal device in the initial setting state. The ROM 13 is a storage area of an interlocking control table that interlocks and controls a controlled device such as a smoke control device based on a fire signal from a terminal device. The RAM 21 is a work area.

The RAM 22 is a memory for the timer,
Output ports PR12, PR22, PR3 of MPU10
2, for counting the time when the output timings of the reset signals output from the PR 42 are shifted from each other.

The RAM 23 stores, during system polling,
This is an area for storing the group number g of the group to which the terminal device that has transmitted the response signal belongs, based on the timing of receiving the pulse. The RAM 24 is an area for storing the number m in the group of the terminal devices that have transmitted the response signal based on the timing of receiving the response pulse during the point polling. The RAM 25 is a storage area that stores control contents executed in system polling.
The RAM 26 is an area for storing a terminal device number to be controlled in selecting and its control content (for example, a test command, a fire confirmation command, a level stop command). RA
M27 is a storage area of state information collected from each terminal device. The RAM 28 is an area for storing the address of the terminal device and its type (ID). The RAM 29 is an area for storing the address of the terminal device determined to be in the disconnection state by the disconnection monitoring selecting.

The latch relay RR1 is a relay coil CR.
1 and switches SR11 and SR12 and transistor TR1
The latch relay RR2 includes a relay coil CR2, switches SR21 and SR22, and transistors TR21 and TR22.
3 is a relay coil CR3 and switches SR31, SR3
2 and transistors TR31 and TR32, the latch relay RR4 includes a relay coil CR4 and a switch SR4.
1, SR42 and transistors TR41, TR42. The latching portions of the latch relays RR1 to RR4 are omitted in FIG.

The transistor TR11 is turned on when a pulse-shaped set signal is received from the output port PR11 of the MPU 10, energizes the relay coil CR1 and sets the latch relay RR1, whereby the switches SR11 and SR12 are set. By switching to the set terminals s, s, the district bell BR1 rings. The transistor TR12 is turned on when it receives a pulsed reset signal from the output port PR12 of the MPU 10, blocks the energization of the relay coil CR1, and resets the latch relay RR1, whereby the switch SR11,
SR12 is switched to the test terminals t, t, and the route for ringing the district bell BR1 is cut off.

The transistor TR21 is turned on when receiving a pulse-shaped set signal from the output port PR21 of the MPU 10, energizes the relay coil CR2, and sets the latch relay RR2, whereby the switches SR21 and SR22 are set. By switching to the set terminals s, s, the district bell BR2 rings. The transistor TR22 is turned on when it receives a pulsed reset signal from the output port PR22 of the MPU 10, blocks the energization of the relay coil CR2, and resets the latch relay RR2, whereby the switch SR21,
The SR22 is switched to the test terminals t, t, and the route for ringing the district bell BR2 is cut off.

The transistor TR31 is turned on when receiving a pulse-shaped set signal from the output port PR31 of the MPU 10, energizes the relay coil CR3, and sets the latch relay RR3, whereby the switches SR31 and SR32 are set. By switching to the set terminals s and s, the district bell BR3 rings. The transistor TR32 is turned on when it receives a pulsed reset signal from the output port PR32 of the MPU 10, blocks the energization of the relay coil CR3, and resets the latch relay RR3, whereby the switch SR31,
SR32 is switched to the test terminals t, t, and the route for ringing the district bell BR3 is cut off.

The transistor TR41 is turned on when receiving a pulse-shaped set signal from the output port PR41 of the MPU 10, energizes the relay coil CR4, and sets the latch relay RR4, whereby the switches SR41 and SR42 are set. By switching to the set terminals s and s, the district bell BR4 rings. The transistor TR42 is turned on when a pulsed reset signal is received from the output port PR42 of the MPU 10, blocks the energization of the relay coil CR4, and resets the latch relay RR4, whereby the switch SR41,
The SR 42 is switched to the test terminals t, t, and the route for ringing the district bell BR4 is cut off.

Disconnection / short circuit detection circuits DR1, DR2, DR
3 and DR4 are district bells BR1, BR2 and BR respectively
3, a circuit for detecting a disconnection or short circuit of a line including BR4, the disconnection of the line is detected according to the presence or absence of a current flowing through the terminating resistor, and the magnitude of the current flowing through the terminating resistor is detected. It detects the short circuit of the line.

The power supply circuit 40 obtains a predetermined DC voltage by rectifying and smoothing the AC voltage sent from the external commercial power supply 41, and the obtained DC voltage is supplied via the power supply line PL. , Sent to the terminal equipment.

FIG. 2 is a block diagram showing a repeater T which is another embodiment of the present invention.

The repeater T includes an MPU (microprocessor) 110, a ROM 111, and an EEPROM 120.
, RAMs 121 and 122, transmission / reception unit 133, this interface 133a, and latch relays RT1 to RT
4, disconnection / short circuit detection circuits DT1 to DT4, and a power supply circuit 140.

The ROM 111 is a storage area for programs such as the flowchart shown in FIG.
120 is an ID of the repeater T such as its own address and type
Is an area for storing. The RAM 121 is a work area. The RAM 122 is a memory for the timer, and the MP
U110 output ports PT12, PT22, PT32,
This is for counting the time for shifting the output timing of the reset signal output from PT42.

The latch relay RT1 is a relay coil CT.
1 and switches ST11 and ST12 and transistor TT1
The latch relay RT2 includes a relay coil CT2, switches ST21 and ST22, transistors TT21 and TT22, and a latch relay RT3.
Is a relay coil CT3 and switches ST31, ST32
And the transistors TT31 and TT32, the latch relay RT4 includes a relay coil CT4 and a switch ST4.
1, ST42 and transistors TT41, TT42. In the latch relays RT1 to RT4, the latching portion is omitted in FIG.

The transistor TT11 is turned on when a pulse-shaped set signal is received from the output port PT11 of the MPU 110, energizes the relay coil CT1 and sets the latch relay RT1, whereby the switches ST11 and ST12 are switched. By switching to the set terminals s and s, the local bell BT1 rings. The transistor TT12 is turned on when a pulsed reset signal is received from the output port PT12 of the MPU 110, blocks the energization of the relay coil CT1, and resets the latch relay RT1.
11, ST12 are switched to the test terminals t, t, and the route for ringing the district bell BT1 is cut off.

The transistor TT21 is turned on when receiving a pulse-shaped set signal from the output port PT21 of the MPU 110, energizes the relay coil CT2, and sets the latch relay RT2, whereby the switches ST21 and ST22 are set. By switching to the set terminals s and s, the local bell BT2 rings. The transistor TT22 is turned on when it receives a pulsed reset signal from the output port PT22 of the MPU 110, blocks the energization of the relay coil CT2, and resets the latch relay RT2.
21 and ST22 are switched to the test terminals t and t, and the route for ringing the district bell BT2 is cut off.

The transistor TT31 is turned on when receiving a pulse-shaped set signal from the output port PT31 of the MPU 110, energizes the relay coil CT3, and sets the latch relay RT3, whereby the switches ST31 and ST32 are switched. By switching to the set terminals s, s, the local bell BT3 sounds. The transistor TT32 is turned on when a pulsed reset signal is received from the output port PT32 of the MPU 110, blocks the energization of the relay coil CT3, and resets the latch relay RT3.
31 and ST32 are switched to the test terminals t and t, and the path for ringing the district bell BT3 is cut off.

The transistor TT41 is turned on when receiving a pulse-shaped set signal from the output port PT41 of the MPU 110, energizes the relay coil CT4, and sets the latch relay RT4, whereby the switches ST41 and ST42 are set. By switching to the set terminals s and s, the district bell BT4 rings. The transistor TT42 turns on when it receives a pulsed reset signal from the output port PT42 of the MPU 110, blocks the energization of the relay coil CT4, and resets the latch relay RT4.
41 and ST42 are switched to the test terminals t and t, and the route for ringing the district bell BT4 is cut off.

When the relay T is turned on,
From this power-on, each latch relay RT1, RT2, RT3, R for a predetermined time according to the self-address of the repeater T.
Waiting for the reset of T4, and after a predetermined time has elapsed, the reset of the latch relays RT1, RT2, RT3, RT4 is started. When a plurality of terminal devices are connected to the fire alarm receiver RE, the predetermined time corresponding to the self-address of the repeater T is different for each repeater T. When the plurality of terminal devices are divided into a plurality of groups, the predetermined time corresponding to the self-address of the repeater is different for each group. In each of the above cases, if the repeater T is provided with a plurality of latch relays, the reset timings of the plurality of latch relays RT1, RT2, RT3, RT4 are offset from each other.

When the relay T is turned on,
After the power is turned on, the reset of each latch relay is waited for a predetermined time according to the self-address of the repeater T, and after a predetermined time has elapsed, the reset of the latch relay is started. When a plurality of terminal devices are connected to the fire alarm receiver RE, the predetermined time according to the self-address of the repeater T is different for each terminal device. When the plurality of terminal devices are divided into a plurality of groups, the predetermined time according to the self-address of the terminal device is different for each group. In each of the above cases, if the repeater T is provided with a plurality of latch relays, the reset timings of the plurality of latch relays are offset from each other.

FIG. 3 shows the fire receiver R in the above embodiment.
It is a flowchart which shows operation | movement of E.

First, the ROM and RAM in the fire receiver RE
When the power of the fire receiver RE is turned on, the timer is started using the RAM 22, and first, the reset signal is output from the output port PR12 of the MPU 10 (S11). The transistor TR12 is turned on, the relay coil CR1 is blocked from being energized, and the latch relay RR1 is reset. And
Wait for a predetermined waiting time (for example, 10 ms) (S1
2) M to reset the second relay RR2
The PU 10 outputs a reset signal from the output port P22 (S13), whereby the transistor TR22 is turned on, the relay coil CR2 is blocked from being energized, and the latch relay RR2 is reset.

Thereafter, similarly to the above, with respect to the third latch relay RR3, standby (S14), reset signal output from the output port (S15), and reset of the latch relay are executed, and the fourth latch relay RR3 is executed. About RR4,
Standby (S16), reset signal output from the output port (S17), and reset of the latch relay are executed. Then, system polling is performed (S21), and if there is this response (S22), point polling (S23).
Is performed, and if there is a response to this (S24), selecting is performed (S25), and a control interrupt is performed if necessary (S26, S27). If there is no response from the system polling (S22), since no state change has occurred in all terminal devices, disconnection discrimination selecting is performed sequentially for each terminal device (S2).
8).

In the operation of the fire receiver RE shown in FIG. 3, since the reset timing is shifted for each latch relay, the output of the reset signal of the MPU 10 is dispersed in time, and a large current is temporarily sent to the signal line SL. It can be prevented from flowing. Therefore, when the power is turned on, it is possible to reduce the voltage drop of the signal line connecting the fire receiver RE and the terminal device.

FIG. 4 is a flow chart showing the operation of the repeater T in the above embodiment.

When the power of the repeater T is turned on, the repeater T reads its own address (S31) and waits for a time corresponding to the self address of the repeater T (S32). Then, the ports PT12, PT22, PT3 of the MPU 110
2. The reset signal is sequentially output from PT42.

As a time corresponding to the self-address of the repeater T, a different time may be adopted for each repeater T when a large number of repeaters T are connected, and a plurality of terminal devices are divided into a plurality of groups. When divided, different time may be adopted for each group.

When a plurality of repeaters T are connected and waiting for a different time for each repeater T, the address of the repeater T is the nth address, and one repeater T to the next repeater T. If the waiting time is 160 ms, for example,
The total waiting time of the repeater T is 160 ms × (n−
1). On the other hand, when a plurality of terminal devices are divided into a plurality of groups, if each group waits for a different time, the repeater T starts measuring the time according to the group to which the repeater T belongs. To do. If the waiting time from one group to the next group is, for example, 160 ms, and if the repeater T belongs to the m-th group, the waiting time of the repeater T is 160 ms.
X (m-1).

In the above embodiment, after waiting for a time corresponding to the self-address of the repeater T (S32), MP
U110 ports PT12, PT22, PT32, PT
Since the reset signal is output from 42, the MPU 110
The timing when the reset signal is output by another relay device T
It is possible to prevent the output of the reset signal of the MPU 110 from being temporally dispersed and to temporarily flow a large current through the signal line SL. For this reason, when the power is turned on,
It is possible to reduce the voltage drop of the signal line connecting the fire receiver RE and the terminal device.

In FIG. 4, when the waiting time has elapsed (S32), the ROM and RAM are checked (S33), and MP
U110 outputs a reset signal from the output port PT12 (S41), which causes the transistor TT12.
Is turned on, the relay coil CT1 is blocked from being energized, and the latch relay RT1 is reset. Then, after waiting a predetermined waiting time (for example, 10 ms) (S42), the MPU 110 outputs a reset signal from the output port P22 to reset the second relay RT2 (S43),
As a result, the transistor TT22 is turned on, the relay coil CT2 is blocked from being energized, and the latch relay RT2 is reset.

Thereafter, similarly to the above, the third latch relay RT3 is on standby (S44), the reset signal is output from the output port (S45), the latch relay RT3 is reset, and the fourth latch relay RT3 is reset. The relay RT4 stands by (S46), a reset signal is output from the output port (S47), a signal for turning on the power supply circuit 140 is output from the port PT42 (S48), and the normal monitoring / control state is established ( S49).

In each of the above embodiments, the signal line SL
In addition to reducing the voltage drop of the
The voltage drop can be reduced. That is, if the reset timings of a plurality of latch relays are the same, a large amount of current flows through the latch relays, and since this current is a current flowing through the power supply line PL, the voltage of the power supply line PL also drops, and the latches that reset at the same time. As the number of relays increases, the voltage drop of the power supply line PL increases, and when a large number of latch relays are installed, the latch relays to be reset may not be reset. However, in the above embodiment, since the reset timing of the latch relay is shifted when the power is turned on, it is possible to reduce the voltage drop of the power supply line PL, and the reset failure of the latch relay occurs even if a large number of latch relays are installed. It can be used for large-scale fire alarm equipment.

In each of the above embodiments, the same applies when other controlled equipment is used instead of the district bell.

[0048]

According to the present invention, it is possible to reduce the voltage drop of the signal line connecting the fire receiver and the terminal equipment when the power is turned on.

[Brief description of drawings]

FIG. 1 is a block diagram showing a fire receiver RE which is an embodiment of the present invention.

FIG. 2 is a block diagram showing a repeater T which is another embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the fire receiver RE in the above embodiment.

FIG. 4 is a flowchart showing an operation of the repeater T in the above embodiment.

[Explanation of symbols]

RE ... Fire receiver, T ... Repeater T, 10, 110 ... MPU, 11, 111 ... ROM, 22, 122 ... Timer RAM, CR1-CR4, CT1-CT4 ... Relay coil, PR12-PR42, PT12-PT42 ... Reset signal output port.

Claims (6)

[Claims] 1. A fire alarm facility in which a fire receiver and a terminal device are connected via a signal line, and the fire receiver calls the terminal device by polling to collect predetermined information and execute predetermined control. When the relay as the terminal device is provided with a latch relay, and when the relay is powered on, the reset of the latch relay is waited for a predetermined time according to the self-address of the relay after the power is turned on. Then, the relay of the fire alarm facility, wherein the reset of the latch relay is started after the lapse of the predetermined time. 2. The repeater of a fire alarm system according to claim 1, wherein the predetermined time according to the self-address of the repeater is different for each repeater. 3. The fire according to claim 1, wherein the plurality of terminal devices are divided into a plurality of groups, and the predetermined time corresponding to the self-address of the repeater is different for each group. Repeater for notification equipment. 4. The latch relay according to claim 1, wherein a plurality of the latch relays are provided in the repeater, and reset timings of the plurality of latch relays are deviated from each other. Repeater for fire alarm equipment. 5. A fire alarm facility in which a fire receiver and a terminal device are connected via a signal line, and the fire receiver calls the terminal device by polling to collect predetermined information and execute predetermined control. A repeater for fire alarm equipment, wherein a plurality of latch relays are provided in a repeater as the terminal device, and reset timings of the plurality of latch relays at power-on are shifted from each other. 6. A fire alarm facility in which a fire receiver and a terminal device are connected via a signal line, and the fire receiver calls the terminal device by polling to collect predetermined information and execute predetermined control. A fire receiver characterized in that the fire receiver is provided with a plurality of latch relays, and reset timings of the plurality of latch relays are different from each other when the power is turned on.