JPH084244B2 - Smoke control terminal device control line disconnection detection method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for detecting a disconnection of a control line of a smoke-excluding smoke proof terminal device in a smoke-excluding smoke activating system.

[Background technology]

In this type of system, as illustrated in FIG. 7, a smoke-proof smoke receiver is connected to a smoke-proof smoke repeater, and a fire door, a shutter, which are connected to the repeater via a control line, A control signal is sent to operate the smoke-exiting terminal devices such as the damper and the smoke exhaust port in an interlocking manner. In the event of a fire, these smoke prevention terminal devices must operate reliably according to the operation of the control switch of each device according to the control signal.Therefore, conduct a continuity test on the control line and disconnect the control line. A disconnection is detected to determine whether or not there is. In recent years, in order to reduce the number of signal lines in smoke prevention systems, it is becoming more common to perform signal transmission between a receiver and a repeater by a multiplex transmission method. There has been a demand for the development of a method for detecting disconnection of a smoke-proof terminal device control line suitable for a smoke operation system.

[Object of the Invention]

The present invention has been made in view of such a current situation, and an object thereof is to prevent disconnection of a control line for a smoke-proof device even in a smoke-proof smoke operation system using a multiplex transmission system. It is an object of the present invention to provide a method for detecting disconnection of a smoke control terminal device control line, which can be easily detected and can also confirm the operation of a control switch for operating the terminal device.

[Disclosure of Invention]

The present invention is proposed to achieve the above object, and is a method for detecting a disconnection of a control line connecting a repeater and a smoke-proof terminal device in a smoke-proof operation system,
It is characterized in that the receiver side decodes the reply signal returned from the repeater in accordance with the control signal sent from the receiver side by the multiplex transmission method, and detects the disconnection of the control line.

The present invention as described above is implemented by using a repeater having the following functions.

That is, in the first embodiment, the repeater controls, tests,
It is configured so that three standby operation modes can be selected by switching the control contact, and when the repeater receives the test command signal included in the multiplex transmission signal transmitted from the receiver side to the repeater side. In the test mode, the control unit is driven, the continuity test circuit is closed on the smoke-proof terminal device via the control line, and the output of this test circuit is returned to the receiver side by the multiplex transmission method, and the receiver It is decoded to detect a break in the control line.

Further, in the second embodiment, the repeater is configured so that two operation modes of control and monitoring can be selected by switching the control contact. When the repeater is in the monitoring mode,
A signal indicating the presence / absence of disconnection of the control line is always returned from the repeater to the receiver side, and is decoded in the receiver to detect the disconnection of the control line.

EXAMPLES Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a circuit diagram showing an example of a smoke-exhaust repeater used in a smoke-exhaust prevention system. This repeater 1 has three switching contacts, and the switching operation of the contacts enables control, testing, and standby. Select three operating modes. This smoke prevention repeater 1
Is installed in the disaster prevention system as shown in FIG. 7, and the operation control and status (operation, non-operation) of the smoke prevention terminal device based on the control signal transmitted from the smoke prevention receiver by multiplex transmission. Is to monitor. In FIG. 1, in order to simplify the description, three terminal device control units 11
13 to 13, it is possible to control three lines (control of three terminal devices). In this embodiment, the damper 2 is added to the control unit 11.
1. A fire door 22 is connected to the control unit 12, and a smoke exhaust port 23 is connected to the control unit 13. In addition, the terminal equipment is not shown in FIG.
Only the coil 31 and its limit switches 32, 33 for driving each terminal device required for control are shown. Fourth
The figure is an enlarged view of that portion. Further, 41 to 43 are LEDs that are turned on when the terminal device is operating, and 44 is an address setting unit configured by a DIP switch.

The multiplex transmission signal sent from the receiver is processed by the signal processing circuits IC1 and IC2. Circuit IC1 number 8-14
Pins (A to F) and Circuit IC2 Pins 8 to 14 (G to
L) is connected to drive circuits D1 to D3 that drive relays R1 / 1 to R3 / 2 for control units 11 to 13 (relays R1 / 1 to R3).
/ 1 via a delay circuit CR), and sends a signal for switching control contacts, which will be described later, provided in each of the control units 11 to 13 for selecting an operation mode. 24V DC terminal equipment control power supplies VP1 to VP3 are respectively supplied to the 1st pin of each control unit 11 to 13, and the 2nd pin is the power supply terminal (+
24V) is connected. Pins 3 and 4 of each control unit 11 to 13 are photocouplers PC2, PC4,
It is connected to PC6. As described above, the coil 31 and the limit switches 32 and 33 of each terminal device are connected between the 5th pin and the 6th pin via the control line 30 (see FIG. 4).

FIG. 2 shows a detailed circuit diagram of the control unit 11. The control unit 11 includes a continuity test circuit including diodes D _B and D _C , resistors R _{C to} R _F, and a capacitor C _C , and two control contacts, that is, a contact r1 / 1 of relay R1 / 1 and a relay R1 / 2. The interlocking contacts r1 / 2 and r1 / 2 are connected as shown. The operation will be described by taking the control unit 11 as an example.

The resistance of the lock coil 31 of the damper 21 is usually about 120Ω, and the damper 21 operates when a current of about 0.2A flows, and the limit switch 32 operates when the operation is completed, and the coil
When the current of 31 is cut off, the limit switch 33 connected between DA1 and CC is closed to notify that it is in the operating state.

Normally, the repeater 1 is in the standby mode, so the contacts r1 / 1 and r1 / 2 of the relays R1 / 1 and R1 / 2 are in the state shown in FIG. 2, and the damper 21 must be supplied with power. , Photo coupler
PC1 is not driven either. Now, when the test command signal is input by the multiplex transmission, the test mode is entered, the relay R1 / 2 is operated, the two contacts r1 / 2 and r1 / 2 are closed, and the continuity test circuit is closed. At this time, the resistors R _C , R _D , and R _E are set so that the photocoupler PC2 is driven by the voltage division of the resistance of the coil 31 and the resistance R _C and the voltage division of the resistance R _D and the resistance R _E. At this time, contact r1
The current flowing through the coil 31 of the damper 21 through / 2 is
It goes without saying that 21 is set to a value that does not work. on the other hand,
When the control line 30 from the 6th and 7th pins to the damper 21 is broken, the cathode side of the LED of the photocoupler PC2 has the same potential as the 2nd pin, so the photocoupler PC2 is not driven. As described above, when conducting, current flows to the LED side and the photocoupler PC2 is driven, but when the wire is disconnected, the LED of the photocoupler PC2
No current flows to the side, and the photocoupler PC2 turns off. This output is sent to the signal processing circuit IC, and further sent to the receiver by multiplex transmission to distinguish between conduction and disconnection of the control line.

On the other hand, when the control signal is input by the multiplex transmission, the repeater 1 enters the control mode, operates the relay R1 / 1, and the contact r1
Supply VP1 with / 1 set to a side. As a result, damper 2
1 works. Therefore, the relay R1 / 1 functions as a control switch that operates the damper 21.

Next, the multiplex transmission signal transmitted from the receiver (not shown) and returned from the repeater 1 will be described with reference to FIG. Third
In the figure, CP1 is a sub-sync signal, CP2 is a sync signal, DP is a transmission signal from the receiver, and RD is a reply signal from the repeater 1. The contents of the transmission signal DP and the reply signal RD are as follows.

And transmission signal DP A ₁ to A _8: an address data, a binary number to the A ₁ and higher digits.

C ₁ : Control bit. Otherwise the bit is "H" C _2, C _3, C
Signal ₄ is invalid.

C _5: control bit. If this bit is not "H", C ₆ , C ₇ , C
Signal ₈ is invalid.

C ₂ , C ₄ , C ₇ : C ₂ is the first line (line of control unit 11), C ₄ is 2
C ₇ is the third line (the line of control unit 12) (the line of control unit 13)
Line), and "H" indicates control and "L" indicates restoration.

C ₃ , C ₆ , C ₈ : C ₃ is a control signal for the first line, C ₆ is a control signal for the second line, C ₈ is a control signal for the third line, and “H” is the start of the continuity test.
"L" indicates the end of the continuity test.

Reply signals RD S ₁ and S ₅ : These are monitoring bits, and if the address data match, these bits are always "L".

_{S 2, S 4, S 7} : S 2 is the 1 line eyes, S ₄ are two-line first, S ₇ is a monitor signal of the 3 lines th, "H" is the operation state of the terminal device, "L "Indicates an inactive state of the terminal device.

_{S 3, S 6, S 8} : S 3 is the 1 line eyes, S ₆ is a two-line first, S ₈ is conductive signal 3 lines th, "H" conductive state "L" is disconnected state Is.

The control of the terminal device of each line of the terminal device by the multiplex transmission signal as described above, the monitoring of the operating state of the terminal device, and the continuity test of the control line will be described by taking the control unit 11 (first line) as an example as described above. To do.

(1) control multiplex transmission signal of the damper 21 (1 line-th control (signal C _2: "H")) pulse is generated from the pin 8 of the signal processing circuit IC1 (A) by. The delay circuit CR widens the pulse width, and the drive circuit D1 operates the relay R1 / 1 to switch the contact r1 / 1 from the terminal b side to the terminal a side. When the control power source VP1 is supplied from the 1st pin, the coil 31 is applied and the damper 21 operates via the contacts r1 / 1, 6th pin and the control line 30. When the first line restoration signal (C ₂ : "L") is sent from the receiver, a pulse is generated from the 9th pin (B) of the processing circuit ICI, the excitation of the relay R1 / 1 is released, and the contact is released. Switch r1 / 1 to side b and restore damper 21.

(2) Monitoring the operating status of the damper 21 When the damper 21 operates as described above, the limit switch 33 is closed, DA1-CC is short-circuited, and the photo coupler P
C1 turns on. Thus, "L" pin 5 is higher than "H" of the signal processing circuit IC1, the return signal RD S ₂ becomes "H".

(3) continuity test multiplex transmission of the test command signal (one line first continuity test started (C _3: "H")), the pulse from pin 10 (C) of the signal processing circuit IC1 is generated. By this pulse, the relay R1 / 2 operates, the two interlocking contacts r1 / 2 and r1 / 2 are closed, and the test conduction circuit is closed. If continuity without disconnection, as described above, the photocoupler PC2 is ON, 6 pin processing circuit IC1 becomes "L" from "H", S ₃ of the reply signal RD becomes "H". If disconnection has occurred, 6 of processing circuit IC1
The No. pin remains “H” and S ₃ becomes “L”.

Continuity test end signal and the continuity test is completed (C _3:
A pulse is generated from pin 11 (D) of processing circuit IC1 by "L"), relay R1 / 2 is restored, and contacts r1 / 2 and r1 / 2 are heard.

(4) Checking operation of relays R1 / 1 Also, with the control power supply VP1 not supplied, relays R1 / 2
To the state of the above continuity test, and relay R1
/ If 1 is operated to be to switch the contacts r1 / 1 from the terminal b to the terminal a side, the relay R1 / by second operation S ₃ reply signal RD becomes "H", the relay R1 / 1 The operation causes S _{3 to} become “L”. Therefore, it is also possible to confirm whether the relay R1 / 2, R1 / 1 by comparing the level of S ₃ is operating normally.

FIG. 5 shows a circuit diagram of another example of the repeater. The repeater 2 has one control contact, and is configured so that two operation modes of control and monitoring can be selected by switching the control contact. The configuration is substantially the same except for the terminal device control units 14 to 16. The configuration and operation of these control units 14 to 16 are
The control unit 14 whose circuit diagram is shown in the figure will be described as an example.

Normally, the repeater 2 is in the monitoring mode, the relay R1 / 1 is not operating, its contact r1 is on the terminal b side, and the continuity test circuit is closed. As described above, since the resistance of the lock coil 31 of the damper 21 is about 120Ω, the resistance value between the fifth pin and the sixth pin is about 120Ω unless the control line 30 is broken. Therefore, the voltage at the (+) side terminal of the comparator CP is
It becomes the partial pressure by the resistance value of. On the other hand, the reference voltage based on the Zener voltage of the Zener diode ZD _A is applied to the (−) side terminal of the comparator CP, the Zener voltage and the resistance value of the resistor R _A are set appropriately, and the (+) The voltage on the () side is lower than that on the (-) side. At this time, the output of the comparator CP is "L".

On the other hand, when the control line 30 is broken, the voltage of 24 VDC is applied to the (+) side as it is. Therefore, (+)
The voltage on the side becomes higher than that on the (-) side, and the output of the comparator CP becomes "H". Input of comparator CP (+) (-)
Alternatively, the output may be changed to "H" during normal operation and "L" during disconnection. On the side of the receiver, the output "H", "L" of the comparator CP returned via the signal processing circuit IC1 is discriminated from normal and disconnection.

On the other hand, if the control power source VP1 of 24V is constantly supplied to the contact r1 side of the relay R1 / 1, when the contact r1 is switched to the terminal a side, a current flows through the coil 31 of the damper 21 to operate.
Of course, the resistance _RA must not be a value capable of passing the current for operating the damper 21 when the contact r1 is on the terminal b side. Furthermore, connect the relay R1 / 1 to the terminal b on the receiver (repeater) side.
It is understood that the output of the comparator CP is the same as that at the time of the disconnection and the relay R1 / 1 operates reliably even when the control power source VP1 to VP3 is supplied by switching from the terminal a to the terminal a. D _A is a diode, and C _A and C _B are capacitors.

The contents of the reply signal RD in this embodiment are as follows.

And transmission signal DP A ₁ to A _8: an address data, a binary number to the A ₁ and higher digits.

C ₁ : Control bit. Otherwise the bit is "H" C _2, C _3, C
Signal ₄ is invalid.

C _5: control bit. If this bit is not "H", C ₆ , C ₇ , C
Signal ₈ is invalid.

C ₂ , C ₄ , C ₇ : Do not use.

C ₃ , C ₆ , C ₈ : C ₃ is a control signal for the first line, C ₆ is a control signal for the second line, C ₈ is a control signal for the third line, "H" is controlled, and "L" indicates recovery. .

Reply signals RD S ₁ and S ₅ : These are monitoring bits, and if the address data match, these bits are always "L".

_{S 2, S 4, S 7} : S 2 is the 1 line eyes, S ₄ are two-line first, S ₇ is a monitor signal of the 3 lines th, "H" is the operation state of the terminal device, "L "Indicates an inactive state of the terminal device.

_{S 3, S 6, S 8} : S 3 is the 1 line eyes, S ₆ is a two-line first, S ₈ is conductive signal 3 lines th, "H" conductive state "L" is disconnected state Is.

The control of the terminal device of the repeater 2, the operation confirmation of the relay R1 / 1, the state monitoring, and the control line continuity monitoring will be described by taking the control unit 14 as an example as in the above.

(1) Control of damper 21 A pulse is generated at pin 10 (A) of the signal processing circuit IC1 by the multiplex transmission signal. The delay circuit CR widens the pulse width, and the drive circuit D4 operates the relay R1 / 1 to switch the contact r1 from the terminal b side to the terminal a side. 5
When the control power supply VP1 is applied to the coil 31 via the number pin and the control line 30, the damper 21 operates.

(2) Checking operation of relay R1 / 1 Turn off the control power supply VP1 at the receiver and operate relay R1 / 1 in the same manner as above. As described above, the output of the comparator CP becomes "H", the transistor of the photocoupler PC2 is turned on, the 5th pin of the signal processing circuit IC1 is changed from "H" to "L", and the relay R1 / 1 operates reliably. You can check that. Of course, the relay is also used during actual control
The operation of R1 / 1 can be confirmed.

(3) Monitoring the operating state of the damper 21 When the damper 21 operates as described above, the limit switch 33 is closed, DA1 and CC are short-circuited, and the photo coupler P
The transistor of C1 turns on. This enables the signal processing circuit
The 5th pin of IC1 changes from "H" to "L", and the status of the damper 21 can be monitored.

(4) Continuity monitoring As described above, when the repeater 2 is in the monitoring mode, the continuity test circuit is closed, and when the control line 30 is disconnected, the output of the comparator CP becomes "H" and the continuity is maintained. Since the output of the comparator CP becomes "L" when it is present, unlike the first embodiment, it is possible to always know the presence or absence of wire breakage.

The normal (abnormal) signal at the time of relay operation confirmation and the disconnection (conduction) signal at continuity monitoring are the same and cannot be distinguished by the reply signal RD, but at the receiver side during control and relay operation confirmation The warning signal may be processed depending on whether it is a warning time (when neither control nor relay operation confirmation is performed).

〔The invention's effect〕

As is clear from the above description, according to the method of the present invention, even in the smoke prevention system of the multiplex transmission system, it becomes possible to easily detect the disconnection of the control line for the smoke prevention apparatus, In addition, the operation of the control switch can be confirmed. Therefore, the reliability of the smoke prevention system using the multiplex transmission system can be further improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an example of a repeater in which the method of the present invention is possible, FIG. 2 is a circuit diagram of its control unit, FIG. 3 is an explanatory diagram of the principle of multiplex transmission signals, and FIG. FIG. 5 is a configuration example of a controlled part of the device, FIG. 5 is a circuit diagram of another embodiment of the repeater, and FIG.
FIG. 7 is a circuit diagram of the control unit, and FIG. 7 is a schematic system diagram of a disaster prevention system. 1,2 …… Smoke proof repeater, 11 to 16 …… Smoke proof terminal equipment controller, 21 …… Damper, 22 …… Fire door, 23 …… Smoke vent, IC1, IC2 …… Signal processing circuit, D1 to D5 …… Drive circuit, PC1 to PC6 …… Photo coupler.

Claims (2)

[Claims] 1. An anti-emission control device comprising a plurality of repeaters connected to a smoke-exhaust smoke-proof receiver via multiple signal lines, and each repeater connected to a smoke-exhaust preventive terminal device via a control line. In the smoke terminal equipment control system, the repeater is configured so that three operation modes of control, test, and standby can be selected by switching the control contact. When receiving the incoming test command signal, by switching the control contact to the test mode, the continuity test circuit to which the test power is supplied to the smoke-proof smoke-proof terminal device via the control line is closed,
The output of this test circuit is sent back to the smoke emission receiver by the multiplex transmission method to detect the disconnection of the control line. 2. An anti-emission control constructed by connecting a plurality of repeaters to a smoke-exhaust smoke-proof receiver via multiple signal lines, and connecting each repeater with smoke-exhaust preventive terminal equipment via a control line. In the smoke terminal equipment control system, the repeater is configured so that two operation modes of control and monitoring can be selected by switching operation of a control contact, and by switching the control contact to a monitoring mode, a smoke-proof smoke-proof terminal A continuity test circuit to which test power is supplied to the equipment is closed, and the output of this test circuit is sent back to the smoke proof smoke receiver by the multiplex transmission system to detect a break in the control line. A method for detecting disconnection of control lines for smoke-proof smoke-excluding terminal equipment.