JPH0427781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a power line transmission control device between devices arranged in a distributed manner.

Conventional technology In recent years, various reports have been published regarding transmission control devices that connect each device with an electrical transmission channel and transmit signals to each other in order to centrally control multiple devices or monitor the current status of the devices. has been done. As an example, there is a method of using a commercial 100V power line as a transmission communication channel to control electrical equipment in a general household. This superimposes a communication signal voltage of a sufficiently higher frequency on the AC voltage of the power line to communicate between each device, and since no special wiring for control is required, the effort and cost associated with installation is small. It has the characteristics of

The conventional transmission control device as described above will be explained below with reference to the drawings.

FIG. 2 is a block diagram of a conventional transmission control device using a generally known power line. 1 is commercial
It is a 100V power line and a carrier signal transmission path. 2 is a controller, and 3, 4, and 5 are adapters that use a power line as a transmission path, and communicate with each other using a carrier wave signal. The adapter has a device control function, a load state detection function, and a communication function, and is connected to the devices 6, 7, and 8, respectively, controls the devices, detects the load state, and communicates with the controller. The controller sends information to each adapter, and includes an operation switch 9 for controlling the equipment and a load status display lamp 10.
It has a function (hereinafter referred to as a test function) that communicates with the adapter indicated by the indicator lamp 10 at the start of energization and displays the load status response from the adapter. With the above configuration, the controller executes a test function every time communication starts, matches the current load state with the display lamp, and when controlling each load, sends a signal to each adapter instructing to reverse the display state. do.
Meanwhile, the adapter controls the load according to this instruction,
Every time the load condition changes, a signal is sent to the controller to notify the controller of the change in the load condition. The controller receives this signal and changes the indicator lamps as necessary.

Problems to be Solved by the Invention However, in such a conventional configuration, there is no display method to indicate that the test function is being executed, and it is not possible to tell when the test function is completed or when the test function fails to confirm the load state. In other words, if all the loads are currently in a stopped state, all the display lamps will remain off as a result of the test function, and there will be no change from when power was started, making it impossible to tell when the test function is complete. In addition, even if the load state confirmation fails, the indicator lamp remains off, so the display does not change to indicate the stopped state, and there is a drawback that the failure is unknown.

The present invention solves these problems,
An object of the present invention is to provide a power line transmission control device that displays the fact that a test function is being executed and that confirmation of a load state has failed without using any special display means.

Means for Solving the Problems In order to achieve this object, the power line transmission control device of the present invention includes an adapter that transmits a load status signal based on a received load status transmission request signal, and a load status transmission request signal that is transmitted to the adapter. a controller that transmits and receives load status signals from the adapter;
A transmission control device comprising a commercial power line serving as a bidirectional transmission communication path between the adapter and the controller, wherein the controller includes communication means for transmitting and receiving data to and from the adapter via the transmission communication path;
load state display means for displaying the load state of the adapter; a timer for measuring a fixed period; and a clock means for displaying the load state display means in reverse at a fixed period or displaying a normal load state. a display control means for controlling the load state, and a display control means for inquiring the load state of the corresponding adapter through the communication means at the start of energization, and instructing the display control means to display the load state display means in reverse at a constant cycle, and receiving a load state signal from the adapter. and an arithmetic control means for instructing the display control means to display a normal load status upon receiving a response.

With this configuration, when the load condition is unknown, such as at the start of energization, an instruction to perform a test function is issued from the arithmetic control means, and at this time, an instruction that the load condition is not normal is sent to the display control means. Then, as soon as the load status is returned from the adapter, an instruction of the normal load status is sent to the display control means. As a result, the display control means instructs the load state display means to indicate the correct load state when a normal load state is indicated by the arithmetic control means, but when the normal load state is not indicated, the display control means performs timekeeping. The inverted display is instructed at a constant period generated from the means.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a power line transmission control device in one embodiment of the present invention. An adapter 12 and a controller 14 are connected to the commercial power line 11 . A load 13 is connected to the adapter 12, and the adapter 12 receives a load status transmission request signal on the commercial power line 11 and transmits the load 1 as necessary.
Controls ON/OFF of 3. The controller 14 is
Communication means 15 that performs transmission and reception with the adapter via the commercial power line 11 that is a transmission communication path, and load state display means 18 to 23 that display the load state of the adapter.
, a clock means 24 for measuring a fixed period, and a display control means 1 for controlling the load state means 18 to 23 to display the load state means 18 to 23 in reverse at a fixed cycle or to display a normal load state display 18 to 23 by the clock means 24.
7, when power is started, the communication means 15 inquires of the corresponding adapter 12 about the load state, and also instructs the display control means to display the load state display means in reverse at a constant cycle, and as soon as the load state signal is replied from the adapter 12. It is comprised of an arithmetic control means 16 that instructs the display control means 17 to display a normal load state, and also instructs the operation switches 25 to 30 to reverse the load state.

The normal operation of the embodiment of the present invention is exactly the same as that of the conventional example, so a description thereof will be omitted. Here, only the operations during the test function that were the means to solve the problem will be explained.

Now, when the current is started, the arithmetic control means 16 outputs a signal that cannot indicate a normal load state to the display control means 17 because the load state is unknown, and at the same time sends a signal to the adapter corresponding to the load state display means currently held. Then, a load status transmission request signal is transmitted from the communication means 15. In response to this, the display control means 17 issues an instruction to the load state display means 18 to 23 to display the load status display means 18 to 23 in reverse video using the timer means 24 which produces a constant cycle. After that, as soon as the response of the load status is received from the adapter 12 via the communication means 15, the calculation control means 16
issues an indication of the normal load state to the display control means 17. In response to this, the display control means 17 displays each normal load state on the load state display means 18 to 23.
If it is ON, it will give an instruction to turn on the light, and if it is OFF, it will give an instruction to turn off the light.

By doing this, the load status display means 18~
23 stops blinking and the normal load status is displayed, then the user can control the display as desired. This is an important problem in a control device that uses power lines because the power outlet can be plugged in freely.

Note that here, for the sake of explanation, we have set limits on the number of adapters 12, the number of controllers 14, and the number of load controls, but any number may be used.Also, the test function can be performed not only at the time of starting power supply but also in a polling format at all times. , the load status under normal conditions is accurately displayed.

Effects of the Invention As described above, in the present invention, the controller inquires the load status of the corresponding adapter through the communication means when power is started, and also instructs the display control means to display the load status display means in reverse at a constant cycle. Since the controller is equipped with arithmetic control means that instructs the display control means to display a normal load state as soon as the load state is returned from the controller, when power is started, the load state is inquired of the adapter displayed on the load state display means, and the adapter displays the load state. Until a response is received, the load status display means of the corresponding adapter can be displayed in reverse video at a certain period, and by changing from this reverse display to the normal load status display, the status of the test function completion can be recognized, and the power line transmission The load status display means always shows the correct load status when the test function is completed when the power is turned on, or when the test function fails to confirm the load status. , its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a configuration diagram showing a conventional example. 11...Commercial power line, 12...Adapter, 13
...Load, 14...Controller, 15...Communication means, 16...Arithmetic control means, 17...Display control means, 18-23...Load status display means, 24...
...Timekeeping means.

Claims (1)

[Claims] 1. An adapter that transmits a load status signal based on a received load status transmission request signal, a controller that transmits a load status transmission request signal to the adapter and receives a load status signal from the adapter, and bidirectional transmission between the adapter and the controller. A transmission control device configured with a commercial power line serving as a communication path, wherein the controller includes communication means for transmitting and receiving data to and from the adapter via the transmission communication path, and load state display means for displaying the load state of the adapter. , a clock means for measuring a constant period; a display control means for controlling the load state display means to display a reversed display at a constant cycle or a normal load state display by the time measurement means; instructing the display control means to inquire about the load status of the adapter displayed on the status display means and to display the load status display means in reverse at a constant cycle;
A power line transmission control device comprising calculation control means for instructing display control means to display a normal load state as soon as a load state signal is returned from an adapter.