JPH05134702A - Equipment controller - Google Patents

Abstract

PURPOSE:To provide an equipment controller where automatic power source throwing to ON at the time of power-on arrival after the power restoration of an automatic operation system is enabled. CONSTITUTION:The system where an automatic power source controller 4 is connected with the equipment controller 5 is constituted in such a way that the automatic power source controller 4 is provided with a first relay contact r1 which detects power-OFF, the equipment controller 5 is provided with a power source part 20 which supplies power to a control circuit 22, a battery 21 which supplies power to the power source part 20 at the time of interruption, a power restoration detecting circuit 24 which detects power restoration after interruption and a relay circuit 31 which receives a contact signal from the relay contact r1 so as to self-arrest a state at the time of interruption and the power restoration detecting circuit 24 releases the self-arrest state of the relay circuit 31 at the time of power restoration after interruption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an equipment control device, and more particularly to an equipment control device capable of canceling a self-trapped state holding an alarm state at the time of power failure.

[0002]

2. Description of the Related Art For example, when automatic operation of an electronic computer or the like is performed, a system is used in which the electronic computer is installed in an air conditioning room and the temperature of the air conditioning room is kept constant. FIG. 4 is a conceptual diagram of the configuration of the air conditioning system. In the figure, reference numeral 1 is an air-conditioning room in which a plurality of air-conditioners 2 are installed. An AC power source is used as the power source of these air conditioners 2.

Reference numeral 3 is a power supply device (CVCF) for supplying power to an electronic computer or the like in addition to detecting an abnormality in the power supply, 4 is an automatic power supply control device (APC), and 5 is an automatic power supply control device 4
A facility control device (F
C). Reference numeral 6 is a CPU that is a computer main body connected to the power supply 3, and reference numeral 7 is an input / output device (I / O) that is also connected to the power supply device 3. The outline of the operation of the system configured as described above is as follows. First, the air conditioner 2 is turned on. The equipment controller 5 is provided with indoor temperature and humidity from sensors. When the temperature and humidity in the air-conditioned room 1 are within the allowable values, the equipment control device 5 notifies the automatic power supply control device 4 of that fact. The automatic power supply control device 4 instructs the equipment control device 5 to turn on the electric equipment. As a result, if the environment becomes soft, the automatic power control device 4
Turns on the CPU 6 and I / O 7.

FIG. 5 is a diagram showing a connection relationship between the automatic power supply control device 4 and the equipment control device 5. The same parts as those in FIG. 4 are designated by the same reference numerals. In the automatic power control device 4,
Reference numeral 10 is a power supply unit, 11 is a logic unit, 12 is a driver (DV) driven by the logic unit 11, 13 is a relay (RL) driven by the driver 12, and rl is a contact of the relay 13. The contact rl is a break contact that is turned off when the relay 13 is turned on. The contact signal of the relay contact rl is input to the equipment control device 5.

In the equipment control device 5, 20 is a power supply unit,
Reference numeral 21 is a battery, and 22 is a control circuit. Reference numeral 30 denotes a relay circuit, which is composed of a series circuit of the relay 23 and its contact point rla, and a circuit in which the relay contact point rl from the automatic power source control device 4 is connected in parallel to the relay contact point rla. The relay contact rla is a make contact that closes when the relay 23 is turned on. The outline of the operation of the system configured as described above is as follows.

When the power supply is not stopped, the logic unit 11 on the automatic power supply controller 4 side sends a signal to the driver 12 to operate the relay 13. As a result, the contact rl is off. As a result, the relay 23 on the equipment control device 5 side does not conduct.

If the AC power supply is stopped for some reason, the relay contact rl on the automatic power supply controller 4 side is turned on. On the equipment control device 5 side, the internal circuit is operated by the battery 21 due to the stop of the power supply.

When the relay contact rl is turned on, the relay 2
3 becomes conductive and its relay contact rla is turned on. As a result, the relay circuit 30 returns to the relay contact r
Even if 1 is turned off, the relay 23 is in a self-trap state in which it remains on. When the power is restored, the control circuit 22 on the equipment control device 5 side causes the logic unit 11 of the automatic power control device 3 to operate.
To notify the alarm.

[0009]

In the above-mentioned conventional circuit, once the relay circuit 30 on the equipment control device 5 side is turned on, the self-trap state is maintained even if the power is restored. Therefore, even though the power is restored and both devices can operate, the equipment control device 5 side continues to hold the alarm, so that power-on is not executed even when the next power-on reserved time is reached. There was a problem.

The present invention has been made in view of the above problems, and an object thereof is to provide an equipment control device capable of automatically turning on the power when the power is turned on when the automatic operation system is restored. ..

[0011]

FIG. 1 is a block diagram showing the principle of the present invention. The same parts as those in FIG. 5 are designated by the same reference numerals. In the figure, rl is a first relay contact provided in the automatic power supply controller 4 for detecting power off. In the equipment control device 5, 20 is a power supply unit that supplies power to the control circuit 22, 21 is a battery that supplies power to the power supply unit 20 during a power failure, and 24 is a power recovery detection circuit that detects power recovery after a power failure. ..

Reference numeral 31 is a relay circuit which receives the first relay contact rl and self-captures the state when a power failure occurs. The relay circuit 31 is composed of a series circuit of a relay 23 and a first relay contact rl, a relay circuit rla of the relay 23 and a relay contact chk of a power recovery detection circuit 24. This series circuit is connected in parallel to both ends of the first relay contact rl. The configuration of the automatic power supply control device 4 is the same as that of the conventional device of FIG.

[0013]

When the power recovery detection circuit 24 detects power recovery during power recovery after a power failure, the relay contact chk is turned off for a certain period. As a result, the self-trapped state of the relay circuit 31 is released, and it is possible to automatically turn on the power when the power is turned on when the automatic operation system restores power.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a configuration block diagram showing a main part of an embodiment of the present invention. In the figure, the power supply unit 20 receives an AC power supply and generates a voltage of + EL. 21 is a battery,
Provides power to the circuit during a power outage. The relay circuit 31 is
It is composed of a series circuit of a relay 23 and a relay contact rl, and a series circuit of relay contacts rla and chk connected to both ends of the relay contact rl.

The power recovery detection circuit 24 includes a power recovery detection unit 24a for detecting power from the power supply unit 20, and the power recovery detection unit 24a.
And a relay (CHK) 24b driven by. The relay contact of the relay 24b is the chk
Then, this relay contact chk is a break contact.

Reference numeral 25 is a power failure detection circuit, 26 is a relay (CHL) driven by the power failure detection circuit 25, and its relay contact chl is connected in series with an alarm lamp 27.
This series circuit is connected between the power supply and the common line. Reference numeral 28 is a reset switch for resetting the alarm lamp 27. The operation of the circuit thus configured will be described below. (In normal operation) The circuit shown in the figure operates by the power source + EL supplied from the power source section 20. At this time, the first relay contact rl is off. Therefore, the relay 23 of the relay circuit 31 does not conduct. The power failure detection circuit 25 is a relay 26
And the alarm lamp 27 does not light. (During power failure) At this time, the circuit operates on the battery 21. Then, the first relay contact rl is turned on. When the relay contact rl is turned on, the relay 23 and the relay contact r
A current flows through the series circuit of l. As a result, the contact point rla is turned on. Therefore, the relay contacts rla and chk are connected in series with the relay 23 to be in a self-captured state. In addition, the power failure detection circuit 25 operates, the relay 26 becomes conductive,
The contact chl is turned on, and the alarm lamp 27 lights up. (When power is restored) When the power is restored, the power failure detection unit 24a detects the power restoration and the relay 24b becomes conductive. As a result, the relay contact chk of the relay circuit 31 is turned off. Here, as shown in FIG. 3, the power recovery detector 24a uses the relay 24 for the time T required to turn off the relay contact chk.
A signal that turns on b is output. When the relay contact chk turns off, the relay 23 turns off and the self-trap state is released. When the self-trapped state is released, the relay contact chk is turned on immediately and the original state is restored. If you do not do this, the relay circuit 3
This is because 1 cannot be put into self-trap.

On the other hand, even if the power is restored, the alarm lamp 27 remains lit, which is inconvenient. Therefore, the reset switch 28 is turned on and the relay 26 is turned off. As a result, the relay contact chl is turned off and the alarm lamp 2
8 goes out.

[0018]

As described above in detail, according to the present invention, the recovery detection circuit is provided, and the self-trap state of the relay circuit is released by the output of the recovery detection circuit.
It is possible to provide an equipment control device capable of automatically turning on the power when the power is turned on when the automatic operation system is restored.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a configuration block diagram showing a main part of an embodiment of the present invention.

FIG. 3 is a diagram showing an output characteristic of a power recovery detection unit.

FIG. 4 is a conceptual diagram of a configuration of an air conditioning system.

FIG. 5 is a diagram showing a connection relationship between an automatic power supply control device and an equipment control device.

[Explanation of symbols]

 4 Automatic Power Control Device 5 Equipment Control Device 20 Power Supply Unit 21 Battery 22 Control Circuit 23 Relay 24 Power Recovery Detection Circuit 30 Relay Circuit rl Relay Contact chk Relay Contact

Claims (3)

[Claims] 1. In a system in which an automatic power control device (4) and an equipment control device (5) are connected, a first relay contact (rl) for detecting power off is provided in the automatic power control device (4). A power supply unit (20) for supplying power to the control circuit (22), a battery (21) for supplying power to the power supply unit (20) at the time of power failure, and a power supply unit (5) for supplying power to the power supply unit (20) in the equipment control device (5). A power recovery detection circuit (24) for detecting power recovery, and a relay circuit (3) which receives a contact signal from the relay contact (rl) and self-captures the state when a power failure occurs.
1) is provided, and the power recovery detection circuit (24) is configured to release the self-trapped state of the relay circuit (31) at the time of power recovery after a power failure. 2. The relay circuit (31) includes a relay (2
3), a series circuit of the first relay contact (r1), and a relay contact (rl) operated by the relay (23).
a) and the relay contact (c) from the power recovery detection circuit (24)
hk) and a series circuit connected in parallel to both ends of the first relay contact (rl). 3. The relay contact (chk) of the power recovery detection circuit (24) turns off the self-trapped state of the relay (23) and the relay contact (rla) generated during a power failure for a certain period. The equipment control device according to claim 2, wherein the equipment control device is solved by the above method.