JPH06292273A - Load controller and lighting controller - Google Patents

Abstract

PURPOSE:To compensate a malfunction without a delay in a control time with respect to plural control terminal equipments by allowing a load adjustment device to generate a direct drive signal when a control signal and a detection output differ from each other. CONSTITUTION:A main control panel 1 sends a transmission signal via a 2-wire transmission line 2 and an address signal in received data by a transmission circuit 5 and a specific address set by an address switch 27 are compared by a control circuit 26 and when they are coincident, a control terminal equipment 3 uses the circuit 26 to drive a relay switch SW based on a content of a control signal inputted to the circuit 5 thereby controlling a lighting fixture. That is, when the fixture is energized, a light emitting diode 32 is lighted via a resistor 28, a photo transistor(TR) 34 is conductive and a current from a relay power circuit 37 via a drive circuit 36 closers a switch 24. When the fixture is interrupted, a light emitting diode 33 is lighted via a resistor 29, a photo TR 35 is conductive and a current from the circuit 37 via the circuit 36 energizes a 2-winding latching relay 41 to open the switch 42.

Description

Detailed Description of the Invention

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load control device and a lighting control device in which a master device controls a control terminal device to remotely control a load state.

[0003]

2. Description of the Related Art Conventionally, as a load control device such as an illumination control device, for example, a device disclosed in Japanese Patent Publication No. 61-24792 is known.

This lighting control device connects a plurality of control terminals to the master via transmission lines and controls the lighting load connected to the control terminals. As a safety circuit, a detection circuit that detects abnormal transmission, such as a short circuit or disconnection of the transmission line, or interruption of the transmission output from the master unit, and a winding of the latching relay that is charged when the transmission circuit is normal It is provided with a charging / discharging capacitor that discharges to the battery and a latching relay, and according to the abnormality detection of the detection circuit, the capacitor is discharged to forcibly turn on the latching relay and the lighting control device is turned on.

However, the one constructed as described above is
For example, when receiving a control signal from the master unit and then transmitting a return signal from the control slave unit to the master unit, it is discharged to supply the drive current of the latching relay driven by the control signal from the master unit. If the capacitor that is charged by the transmission signal matches the time when the charging current is supplied from the transmission to the capacitor, the return signal is sent from the slave unit to the master unit in current mode. Was superimposed on the return signal, and there was a problem that a normal return signal could not be sent.

To solve this problem, Japanese Patent Application No. 2-4
An illumination control device as described in Japanese Patent No. 7454 (Japanese Patent Laid-Open No. 3-250588), that is, an illumination control device having a fail-safe function of driving a latching relay when a transmission abnormality is detected has been developed.

However, it has been found that the load device such as a lighting device may not be normally controlled due to factors other than the transmission abnormality. That is, when the coil inside the latching relay is excited to drive the latching relay, the latching relay may malfunction depending on the timing of exciting the coil, in other words, depending on the timing of applying the exciting current. There was a problem that the device could not be controlled normally.

Also, in addition to a relay switch such as a latching relay, another breaking device such as a phototriac or a semiconductor switch, or a load adjusting device including a semiconductor device for adjusting the power supplied to the load is used. The same malfunction may occur depending on the timing of inputting the drive signal.

In order to solve this, for example, after the master unit transmits a control signal, the operating state of the latching relay is monitored with respect to the control terminal unit, and the control signal is transmitted again based on the monitoring result. Alternatively, it is conceivable that the control terminal device turns on the exciting current while avoiding the timing when a malfunction is likely to occur.

[0010] However, in the former case, since the master unit which processes the transmission signals for a large number of control terminals needs to monitor the operating state of the latching relay, the transmission signals including the waiting time of the calculation process must be monitored. It is easy to induce a delay in the control time due to excessive calculation processing, and the latter does not always ensure control even if the excitation current is turned off due to an error in the latching relay. There is a problem of poor reliability.

[0011]

SUMMARY OF THE INVENTION As described above, in the prior art, in order to reliably compensate for the malfunction of the load adjusting device or the disconnecting device connected to the load device such as the lighting equipment, the master device is used as a load. Although it is conceivable to monitor the operating state of the adjusting device or the interruption device, in practice, when a large number of control terminals are connected, there is a problem that a delay in control time is easily induced. Therefore, the present invention is capable of reliably compensating the malfunction of the load adjusting device or the interruption device without delaying the control time even when a plurality of control terminals are connected to the master device. An object is to provide a control device.

[0012]

According to a first aspect of the present invention, there is provided a load control device including: a master device for transmitting a transmission signal including a control signal;
A control terminal device to which a transmission signal is transmitted, a load adjusting device driven by a drive signal output by the control terminal device based on the control signal, and a load device connected to the load adjusting device,
And a monitoring means for detecting the operating state of the load adjusting device,
The control terminal device is characterized in that the control signal is compared with the detection output of the monitoring means, and when the control signal and the detection output are different, a drive signal is generated for the load adjusting device.

According to another aspect of the load control device of the present invention, a master device for transmitting a transmission signal including a control signal, a control terminal device for transmitting the transmission signal, and a drive signal output by the control terminal device based on the control signal. A relay switch driven by the relay switch, a load device connected to the relay switch, and monitoring means for detecting the operating state of the relay switch.The control terminal device compares the control signal with the detection output of the monitoring means. A drive signal is generated for the relay switch when the control signal and the detection output are different.

According to another aspect of the lighting control device of the present invention, a master device that transmits a transmission signal including an address signal and a control signal, and a transmission signal that is transmitted so that different addresses can be set. A plurality of control terminals that output a drive signal according to the control signal when and match, and a relay switch that is connected to this control terminal and that is driven by the drive signal, and that is connected to this relay switch. The lighting device and the monitoring means for detecting the operation state of the relay switch are provided, and the control terminal device compares the control signal with the detection output of the monitoring means, and when the control signal and the detection output are different, the control signal is transmitted to the relay switch. It is characterized in that a drive signal is generated.

The lighting control device according to a fourth aspect is characterized in that the relay switch is built in a control terminal.

[0016]

According to the load control device of the present invention, the control terminal device compares the control signal with the detection output of the monitoring means, and when the control signal and the detection output are different, the load adjusting device. Since a drive signal can be generated directly to the master device, the calculation processing of the master device does not become excessive. Therefore, even when multiple control terminals are connected to the master device, the control time The malfunction of the load adjusting device can be reliably compensated for without delay.

According to the second to fourth aspects of the present invention, the control terminal device compares the control signal with the detection output of the monitoring means, and when the control signal and the detection output differ from each other. Since the drive signal can be directly generated to the relay switch, the control time is delayed even when a plurality of control terminals are connected to the master device, as in the invention described in claim 1. The malfunction of the relay switch can be compensated for without fail.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, a main operation panel 1 which is a master device outputs a transmission signal and the like and is connected to a control terminal device 3 as a control terminal device via a two-wire transmission line 2, and this control terminal device 3 A lighting device 4 as a load device is connected to the through a relay switch SW which is a breaking device.

A monitoring circuit A is connected to the load device side of the relay switch SW to detect the output voltage of the load device side and monitor the operating state of the relay switch SW. Is configured to output a closing signal to the control terminal 3 when the relay switch SW is closed and an opening signal when the relay switch SW is opened.

Here, as shown in FIG. 2, the control terminal 3 is connected to a transmission circuit 2 for transmitting and receiving a transmission signal and a transmission signal for returning, and the transmission circuit 5 is connected to the fail circuit. The safe drive circuit 6 is connected.

A series circuit of a diode 7, a resistor 8 and a capacitor 9 is connected between the output terminals of the transmission circuit 5,
The transistor 1 is connected to the connection point of the resistor 8 and the capacitor 9.
The collector of 0 is connected and is also connected to the base of the transistor 10 via the resistor 11.

Further, the emitter of the transistor 10 has a number of resistors 1 according to the number of systems of the lighting device 4 to be controlled.
2 is connected.

The base of the transistor 10-is
Transmission abnormality detection circuit 15 for detecting short circuit and open of the transmission line 2
Are connected. The transmission abnormality detection circuit 15 receives the transmission signal of the main operation panel 1, and the cathode of the Zener diode 16 is connected to the DC voltage Vcc generated by the transmission circuit 5, and the anode of the Zener diode 16 has the resistance 1
7 is connected to the base of the transistor 18, the emitter of the transistor 18 is grounded, and the bias resistor 19 is connected between the base and the emitter.

The collector of the transistor 18 is connected to the cathode of the zener diode 16 via the resistor 20, and the connection point of the resistor 20 and the collector of the transistor 18 is connected to the connection point of the base of the transistor 10 and the resistor 11. Connected to the base of the transistor 22 via the resistor 21.
A resistor 23 is connected between the base and the emitter of the capacitor, and a capacitor 24 is connected between the collector and the emitter of the transistor 22.
Are connected. The output terminal is connected to a control circuit 26 such as a CPU, and an address switch 27 and a monitoring circuit A are connected to the control circuit 26.

Further, the control circuit 26 is connected to a relay drive circuit 31 via a resistor 28 and a resistor 29. The resistor 28 is also connected to the resistor 12.

Furthermore, the relay drive circuit 31 is
A light emitting diode 32 is provided in each of the resistor 28 and the resistor 29.
Alternatively, it is connected to the light emitting diode 33, and the light emitting diode 32 or the light emitting diode 33 is photo-coupled to the phototransistor 34 or the phototransistor 35, respectively, and electrically insulated, and the phototransistor 34 or the phototransistor 35 is driven by the drive circuit 36. It is connected to the. A relay power supply circuit 37 that supplies power to the relay drive circuit 31 is connected to the relay drive circuit 31.
7 is connected to a commercial AC power supply 38.

Further, the drive circuit 36 is connected to the two-winding latching relay 41 of the relay switch SW, and the photocoupled light emitting diode 32 and phototransistor 34 are connected to the set terminal, and photocoupled light emission. The diode 33 and the phototransistor 35 are connected to a reset terminal, and a switch 42 connected between the commercial AC power supply 38 and the lighting fixture 4.
On or off.

The switch 42 which is operated independently is
When there are more than two switches, the two-winding latching relay 41, the pair of photocoupled light emitting diodes 32 and 33, and the phototransistor 34 are included in the switch 42.
A number such as 35 corresponds.

Next, the operation of the above embodiment will be described.

First, in normal times, a transmission signal is sent from the main operation panel 1 via the two transmission lines 2 and the address signal in the data received by the transmission circuit 5 and the address switch 27.
The control circuit 26 compares the peculiar address set by the control circuit 26, and the control terminal 26 in which the address signal and the peculiar address match is based on the control signal input to the transmission circuit 5 by the control circuit 26. With the contents described above, the relay switch SW is driven to control the operation of the lighting fixture 4. That is, for example, when the lighting fixture 4 is turned on, the light emitting diode 32 is turned on via the resistor 28, the phototransistor 34 is turned on, and a set of receiving current supply from the relay power supply circuit 37 via the drive circuit 36 is set. It is turned on and the switch 42 is closed.

Here, as shown in the operation flow chart shown in FIG. 3, the control circuit 26 shows the operation state of the relay switch SW detected by the monitoring circuit A and the control state command by the control signal input to the transmission circuit 5. If the two are not compared with each other, that is, in other words, the two-winding latching relay 41 malfunctions in the above operation and the switch 42 is maintained in the open state, the transmission is performed by the control circuit 26 as described above. The relay switch SW is driven again with the content based on the control signal input to the circuit 5.

On the other hand, when turning off the lighting equipment 4,
The light emitting diode 33 is turned on via the resistor 29, the phototransistor 35 is turned on, current is supplied from the relay power supply circuit 37 via the drive circuit 36, and the reset of the two-winding latching relay 41 is turned on.
open.

Further, similarly to the above, as shown in FIG. 3, the operating state of the relay switch SW detected by the monitoring circuit A,
The control circuit 26 compares the control state command based on the control signal input to the transmission circuit 5 with the control circuit 26, and when the switch 42 maintains the closed state in the above operation, the control circuit 26 transmits this transmission as described above. The off control signal input to the circuit 5 drives the relay switch SW again.

Therefore, since the malfunction of the relay switch can be reliably compensated for without using the master unit that processes the transmission signal for the control terminal unit, the calculation of the transmission signal including the waiting time for the master unit calculation process is performed. There is no delay in control time associated with processing.

When there is no abnormality in the transmission, the Zener diode 16 is on and the transistor 18 is on, so the base current of the transistor 10 is bypassed and the transistor 10 is off. Also,
When the transmission is abnormal, the Zener diode 16 of the transmission abnormality detection circuit 15 is turned off and the transistor 18 is turned off, so that the base current flows through the transistor 10, the transistor 10 is turned on, and the transistor 10 is charged by the transmission signal. The fail-safe drive circuit 6 turns on the light-emitting diode 32 and turns on the phototransistor 34 by using the capacitor 9 as a power source and the drive circuit 36.
2 is supplied with current from the relay power supply circuit 37 via
The winding latching relay 41 is set and the switch 42 is turned on. Therefore, in the present embodiment, the lighting fixture 4 can be turned on even if a transmission abnormality occurs.

In the above-mentioned embodiments, the case where the relay switch is used to perform the on / off control of the luminaire which is the load device has been described. However, for example, another interruption device such as a phototriac or a semiconductor switch is used. Further, for example, a load adjusting device using a thyristor or a transistor may be used to control the lighting equipment and other load devices.

[0037]

As described in detail above, according to the load control apparatus of the present invention, the control terminal unit compares the control signal with the detection output of the monitoring means, and the control signal and the detection output. Since the drive signal can be directly generated to the load adjusting device when the values of and are different from each other, the arithmetic processing of the master device does not become excessive, so that a plurality of control terminals can operate in the master device. Even when they are connected, the malfunction of the load adjusting device can be reliably compensated without delaying the control time.

According to the second to fourth aspects of the present invention, the control terminal device compares the control signal with the detection output of the monitoring means, and when the control signal and the detection output differ from each other. Since the drive signal can be directly generated to the relay switch, the control time is delayed even when a plurality of control terminals are connected to the master device, as in the invention described in claim 1. The malfunction of the relay switch can be compensated for without fail.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a system using a load control device of the present invention.

FIG. 2 is a block diagram showing an embodiment of a load control device of the present invention.

FIG. 3 is a flowchart showing the operation of the control terminal of the present invention.

[Explanation of symbols]

1 ... Main operation panel 2 ... Transmission line 3 ... Control terminal 4 ... Lighting equipment SW ... Relay switch A ... Monitoring circuit

Claims (4)

[Claims] 1. A master device for transmitting a transmission signal including a control signal, a control terminal device for transmitting the transmission signal, and a load adjustment driven by a drive signal output from the control terminal device based on the control signal. An apparatus, a load device connected to the load adjusting device, and a monitoring unit that detects an operating state of the load adjusting device, wherein the control terminal device compares the control signal with a detection output of the monitoring unit. The load control device is configured to generate a drive signal to the load adjusting device when the control signal and the detection output are different. 2. A master device for transmitting a transmission signal including a control signal, a control terminal device for transmitting the transmission signal, and a relay switch driven by a drive signal output from the control terminal device based on the control signal. And a load device connected to the relay switch, and a monitoring means for detecting the operating state of the relay switch, the control terminal device compares the control signal and the detection output of the monitoring means, A load control device for generating a drive signal to the relay switch when a control signal and a detection output are different. 3. A master device for transmitting a transmission signal including an address signal and a control signal; and, when the transmission signal is transmitted, different addresses can be set, and the own address and the address signal match. A plurality of control terminals for outputting a drive signal according to a control signal, a relay switch connected to the control terminal and driven by the drive signal, and a lighting fixture connected to the relay switch, And a monitoring means for detecting the operating state of the relay switch, the control terminal device compares the control signal and the detection output of the monitoring means, the relay switch when the control signal and the detection output are different. An illumination control device characterized in that a drive signal is generated. 4. The lighting control device according to claim 2, wherein the relay switch is built in the control terminal.