JPH03147291A - Lighting control system - Google Patents

Abstract

PURPOSE:To ensure safety by turning a control output to a lighting load 'OFF', and by reading the setting of an output change-over means when a signal is not received from a center control means within a certain period of time, so as to output the set condition. CONSTITUTION:When a power source is turned 'ON', a relay output of a terminal 6 is turned 'OFF'. A signal on a transfer route 1 is surveyed as well as a control signal to a self terminal 6, and when a control signal is received, a certain process of control is started based on the control signal. When the control signal is not received within five seconds, an output change-over switch 7 is read, and based on the condition of the switch 7, a control signal is output to a relay. The transfer route 1 is surveyed after that, and when a control signal to the self terminal 6 is received, a predetermined process of control is performed. When a service interruption is over, an OFF signal is output from the terminal 6 to a lighting load 2. A control signal is transferred from a center controller 4 to a gateway device 8, which performs conversion of the signal and transfers the control signal converted to the terminal 6. Based on the contend, the load 2 is controlled by the terminal 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lighting control system, and particularly to a lighting control system that centrally monitors and controls one or more lighting loads.

(Prior Art) FIG. 4 is a block diagram showing a load control system disclosed in Japanese Patent Application No. 1-108080 (hereinafter referred to as the conventional example). In Figure 4 of the drawing, 1 is a power line, 2 is this power line 1
3 is a terminal device that controls the lighting load 2 to flicker with a switch such as a relay contact; 4 is a central device that sends a control signal for the lighting load to the terminal device 3 via a signal transmission line 5; It is a control device. A gateway device 8 is provided corresponding to the power line 1 and converts the load control signal sent from the central control device 4 via the signal transmission line 5 into a transmission signal for power line carrier communication, and sends it onto the power line 1. be. Note that addresses are individually set for each terminal device 3 and each gateway device 8.

Next, the operation of this conventional example will be explained using FIG. 4.

In order to control the terminal device 3 in the conventional load control system shown in FIG.
A control signal is sent from the signal transmission line 5 to the signal transmission line 5. Each gateway device 8 constantly monitors the transmission signal on the signal transmission line 5, and when the gateway address of the transmission signal indicates its own address, it takes in that signal and sends it to each terminal based on the control signal. The control signal is converted into a control signal for the device 3 and sent to the power line 1.

Each terminal device 3 constantly monitors the transmission signal on the power line 1, and when the terminal device address of the transmission signal indicates its own address, it takes in that signal and performs a predetermined operation based on the content indicated by the control data. Process.

The gateway device 8 is a terminal device 3 connected to the power line 1.
It is possible to memorize what kind of control signal to send when the power is turned on, so when recovering from a power outage,
The terminal device 3 is configured to be able to be controlled to a predetermined state even if the control signal from the central control device 4 is not sent out for some reason.

(Problems to be Solved by the Invention) As described above, in the conventional example, the lighting load is controlled by the control signal from the gateway device upon recovery from a power outage. However, lighting control is generally +1ilJ? Considering the case where the Xl signal cannot be transmitted, the output state of the terminal is set to ON until the control signal arrives. Therefore, if the control device fails, there is a problem that if private power generation is used, there is a possibility that the generator will be overloaded.

This invention was made in order to solve the problems of the conventional example as described above, and the control output for the lighting load of the terminal control is turned off when the power is turned on.

Preventing overload on the private power generation etc. when the power is turned on, and further providing an output switching means in the terminal control means so that when a control signal does not arrive within a predetermined time,
The purpose is, for example, to manually control the lighting load and ensure safety.

[Means to solve the problem]

Therefore, in the present invention, a device or a plurality of terminal control means for controlling the lighting load connected to the power line, and a central if that controls the lighting load by communicating with the terminal control means are provided.
A lighting 21+11I system having a J# means, wherein the terminal 11111 means has an output switching means when remote control is not possible, and turns off the control output for the lighting load when the power is turned on, and then switches it off for a predetermined period of time. If the control signal from the center*1m means does not arrive within the time, the lighting control system has a control means that reads the setting of the output switching means and outputs the setting state to the lighting load. It is an attempt to achieve a goal.

[Effect]

The lighting control system in this invention controls the lighting load connected to the power line using one or more terminal control means.
L. The central control means communicates with the terminal 11UI means to control the lighting load.

In addition, the terminal control means having an output switching means when remote control is disabled turns off the control output for the lighting load when the power is turned on.
F, and if a control signal from the central Ir1l1 means does not arrive within a predetermined time, the setting of the output switching means is read and the setting state is controlled to be output to the lighting load.

〔Example> An embodiment of the present invention will be described below based on the drawings.

Drawings Fig. 1 is a configuration diagram showing a lighting control system which is an embodiment of the present invention, Fig. 2 is a flowchart for controlling the operation when the power is restored in this embodiment, and Fig. 3 is a flowchart showing the operation when the power is restored in this embodiment. FIG. 2 is a communication sequence diagram of FIG.

In FIGS. 1 to 3 of the drawings, the same or equivalent components as in the conventional example are represented by the same reference numerals, and redundant explanation will be omitted.

In FIG. 1 of the drawings, A is a terminal control means, and the CPU
It is a means for controlling a lighting load 2 connected to a power line, and is composed of a terminal device 6 including a power line 9 and an output switching means C. Further, as described above, the terminal control means A has an output switching means C (described later) when remote control is not possible, and a power source (not shown).
The control output for the lighting load 2 during immersion is turned OFF, and if a control signal is not received from the central control means B (described later) within a predetermined period of time, the setting of the output switching means C is read and the illumination condition is changed to indicate the bad setting. This means includes a control means D (details will be described later) which controls output to the load 2. The central control means B communicates with the terminal III and controls the lighting load 2.
It is a means for controlling, and is composed of a central control device 4. The output switching means C is composed of an output changeover switch 7, and is a means for switching the output when remote control is impossible.

Next, the operation of this embodiment when the power is turned on is shown in Figures 1 to 3.
The control means built in the terminal control means A will be mainly explained using the drawings.

In the flowchart in Figure 2 of the drawing, starting from
When the power is turned on (step 2a), the output of the relay of the terminal device 6 is turned off (step 2b). Since the operation of the CPU 9 is very fast compared to the time required for the operation of the relay coil, the output to the lighting load 2 can be turned off without turning on the relay. Next, transmission line 1
It monitors the above f3, monitors the control signal for its own terminal 6, and when a control signal arrives, starts a predetermined 1llal based on the control signal (step 2c).

If no control signal is received within 5 seconds (step 2d) (N),
The output changeover switch 7 is read (step 2e), and a control signal is output to the relay based on the state of the output changeover switch 7 (step 2f). Thereafter, the signal on the transmission path is monitored (Step 2g), and when a control signal is received for the own terminal 6 (Step 2h) (Y), a predetermined control can be performed (Step 2i).

Next, the communication sequence upon recovery from a power outage in this embodiment will be explained using FIG.

First, when power is restored from a power outage, the terminal device 6 outputs an OFF control signal to the lighting load 2 (dotted line in the figure). The central control device 4 transmits a control signal (for example, a signal to restore the output state of each terminal device before the power outage) to the gateway device 8,
The gateway device 8 converts the signal into a control signal for the terminal device 6 and transmits it to the terminal device 6. When the terminal device 6 receives the control signal, it controls the lighting load 2 based on the content of the control signal.

As described above, according to this embodiment, since the control output for the lighting load is turned off when the power of the terminal device is turned on, there is no overload on the private generator or the like when the power is turned on. Further, even in the event that control from the i11 control device is not possible, the terminal device can locally control the lighting load by setting the output changeover switch if a control signal does not arrive within a predetermined time.

(Effects of the Invention) As described above, according to the present invention, the control output of the terminal control means to the lighting means can be turned off when the power is turned on, and when the power is turned on, there is no possibility of overloading the private power generation, etc. By providing an output switching means in the terminal control means, it is possible to obtain a lighting control system that can manually control the lighting load and ensure safety when a control signal does not arrive within a predetermined time. effective.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a lighting control system showing an embodiment of the present invention, Fig. 2 is a flowchart showing processing when power is restored in this embodiment, and Fig. 3 is a communication sequence when power is restored in this embodiment. 4 are configuration diagrams showing the configuration of a conventional example. A --- One terminal control means B --- Central control means C --- One output switching means D --- Control means Y --- One illumination control system 1 --- -Power line 2--Lighting load 6...Terminal device 7--1 output changeover switch Note that in each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A lighting control system comprising one or more terminal control means for controlling a lighting load connected to a power line, and a central control means for communicating with the terminal control means and controlling the lighting load, the terminal control means comprising: The output switching means has an output switching means when remote control is not possible, and turns off the control output for the lighting load when the power is turned on, and when a control signal from the central control means does not arrive within a predetermined time, the output switching means A lighting control system characterized by comprising a control means for reading the settings of the lighting device and outputting the setting state to the lighting load.