JPH02268098A - Transmission control method - Google Patents

Abstract

PURPOSE:To execute safely load on/off control even by a remote control by allowing a terminal equipment to control the load forcibly from ON to OFF state at the disabled reception of an ACK text. CONSTITUTION:When a user uses a local switch 28 of a terminal equipment 25 to turn on a load 27, its on-state signal is sent to a controller 26 via a commercial 100V power line 24 with a communication means 32. The controller 2 uses a display means 29 to display the on-state of the load 27 and sends the ACK text to the device 25. When an arithmetic control means 33 detects it that the communication means 32 of the equipment 25 does not receive the ACK text, the load 27 during the connection is forcibly controlled to be OFF.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transmission control method using a commercial 100V power line as a transmission communication path, and in particular to a method of controlling loads that require safety considerations.

Conventional technology A transmission control method that connects each device with an electrical communication network and transmits control signals to each other for the purpose of centrally controlling multiple devices or monitoring the current status of the device. is being used.

- For example, to control the load in a general household, commercial 10
There is a method of using a 0V power line as a transmission communication path. This method superimposes a communication signal voltage at a sufficiently higher frequency on the AC voltage of the power line to communicate between each device, and since special wiring for control is not required, it is time consuming and costly to install. It is characterized by a small value.

Here, the equipment refers to the load to be controlled, the load state detection function that detects the state of the load, and the load that controls the load to be energized (hereinafter referred to as ON) or de-energized (hereinafter referred to as OFF). A device that combines a terminal device with a control function, a communication function for transmitting and receiving control signals with other devices, and a self-address setting function for setting the own address. In addition, as another type of equipment, it has a communication function that sends and receives control signals to and from each terminal device, and an ON/OF function that transmits control signals to each device.
Control signal generation function that generates F control signals and each device
There is a control device that has a monitor display function that displays whether it is in the N state or the OFF state, a partner station address setting function, and a own station address setting function. A transmission control method using such a power line will be described below with reference to the drawings.

"M 3 tN" is a block diagram of a conventional transmission control method using a power line. 1 is a commercial 100V power line, which is in a general household. Devices 8 and 9 are loads 4 and 5, respectively. It is a combination of terminal devices 2 and 3,
Each is connected to a power line 1. As mentioned above, the terminal devices 2 and 3 have a load detection function, load control function,
It has a communication function and a self-station address setting function, detects and controls the ON/'○FF of the loads 4 and 5 connected to it, and also communicates with other devices using the power line 1 as a transmission communication path.

At this time, it is the own address setting means 6 and 7 that sets the own address. On the other hand, the control device 10 is a type of device, and is connected to the power line 1 and has communication functions and functions as described above.
It has a control signal generation function, monitor display function, own station address setting function, and partner station address setting function. Reference numeral 11 denotes a local address setting means. Then, by pressing the load control switch 16 to 19 corresponding to the load to be controlled, the control device 10 transmits O to the terminal device set by the partner station address setting means 12 to 15 corresponding to that switch
Send the N/OFF control command with a command indicating the second station address. The terminal devices 2 and 3 detect this and control the loads 8 and 9 connected to themselves according to the received control command. .

Also, the load status indicating the result of this control is sent to the control device IO with its own station address attached. In response to this, the control equipment 10
displays the display means 20 to 23 corresponding to the own station address of the transmitted signal on the monitor, and sends an ACK message to the terminal devices 2 and 3 as a response to the reception of the message. The terminal devices 2 and 3 receive this ACK message and the communication is completed.

Through the series of operations described above, the load condition can be controlled and monitored as desired.

Problems to be Solved by the Invention However, the transmission control device as described above has the following problems to be solved. That is, the control device ACK'It after receiving the reply signal from the terminal device.
The message is sent to the terminal device, but even if this ACK message does not reach the terminal device, the display on the display device & does not change.

In other words, if communication between the terminal device and the control device is obstructed for some reason, the display on the control device may be OFF even though the load is ON. That's what it means. In such a case, if the load controlled by the terminal device is not safe, 71. −． This is not a big problem if the load is one that does not require much heat, such as lighting or an air conditioner, but if the load is one that generates heat, such as an electric stove or iron, it becomes a major problem.

The present invention is intended to solve these problems, and aims to provide a transmission control method that can ensure sufficient safety even when ON/OFF control of a load is performed by remote control.

Means for Solving the Problems In order to achieve the above object, the present invention provides a terminal device that controls a load connected to itself and transmits a load status message after the control, and a terminal device that transmits a load status message (11), I2t! When a message is received, as a response, A CK 'r+r:, Negative Moe is turned on/off according to the information included in the message received by the person sending the message.
It is composed of a control device that displays the FF status, and a transmission communication path that transmits data between the Mij '8 terminal device and the control device, and the terminal device turns on the load and transmits the load status as a result. If the ACK message sent by the control device as a response to the message cannot be properly received, the terminal device uses a transmission control method to turn off the load.

Effect The above method can safely handle the signal attenuation that occurs when the impedance of the line decreases due to an increase in the number of loads connected to the power line. be.

j! fl, the control equipment is OFF when the load is ON.
``The unsafe state of display is eliminated, and transmission control can be performed with reliability.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a first embodiment of the present invention. [4
25 is a terminal device, and 26 is this terminal device 2.
This is a control device that controls the load 27 connected to the terminal device 25 via the terminal device 25 via trace control. Terminal equipment 25y/,
and IlJ equipment 2 (5 is a commercial 10 which is a telecommunication channel)
It is connected to a 0 V power line 24. The terminal device 25 is
Communication means 32 having a communication function to communicate with the control device 26
, a front seat control means 33 that decodes this communication message and controls the load control means 34, a load control means 34 described in 11r that controls the load 27, and a hand switch 28 operated by the user.
It is equipped with - The force control device 26 has the same structure as the conventional one, and is equipped with a pilot lamp 29 which is a display means for indicating the ON/OFF state of the load 27.

With the above configuration, this embodiment operates as follows. Assume that the user operates the hand switch 28 of the terminal device 25 to turn on the load 27. This ON state signal is transmitted by the communication means 32 of the terminal device 25 to the control device 26 via the commercial 100V power line 24 as shown by an arrow 30. The control device 26 displays that the load 27 is in a bad ON state using a pilot lamp 29 serving as a display means, and at the same time sends an ACK to the terminal device 25 indicating that the ON state message has been received.
The message is transmitted as shown by arrow 31. Communication is thus completed. However, here, for example, if there are many loads 27 connected to the power line 24 and the impedance of the line is low, and the Mii3's ACK message does not reach the terminal device 25, even if the load 27 is in the ON state. Regardless, there may be cases where the control device 26 displays an OFF display. Therefore, in the method according to the present embodiment, when the calculation control means 33 detects that the communication means 32 of the terminal device 25 has not received the ACK message transmitted by the control device 26, the connected load 27 is forcibly The method according to this embodiment is particularly effective when the load requires OFF detection, and it is possible to construct a system that can safely control loads that require safety considerations. It is what it is.

Next, a second embodiment will be described based on FIG. FIG. 2 shows a case where a plurality of control devices exist. In the figure, 26, 41, and 42 are control devices. The configuration of the terminal device 25 is the same as that of the first embodiment described in III, and the explanation thereof will be omitted.

When the load 27 is turned ON using the hand switch 28 of the terminal device 25, the ON state message is transmitted from the terminal device 25 to the commercial 100.
The signal is transmitted via the V power line 24 to the terminal devices 26, 41, and 42 as shown by arrows 35, 37, and 39. The control devices 26, 41, and 42 control each pilot lamp 29.
・Turn on 43 and 44 to indicate that the load 27 is ON status. At the same time, each control device 26, 41
- An ACK message indicating that the ON state message has been received is returned from 42 to the terminal device 25 as shown by arrows 36, 38, and 40, and the communication is completed.

In this embodiment, as in the case of the first embodiment described above, the ON state messages of arrows 35, 37, and 39 and the arrows 36 and
If even one of the ACK messages of 38 and 40 cannot be received, the terminal device 25 immediately turns off the load 27. In this way, unsafe conditions can be avoided.

Effects of the Invention As described above, the present invention provides an AC connection from a control device to a terminal device.
If even one K message cannot be received, the terminal device forcibly turns the load from ON to OFF and controls the panel to provide an optimal method for controlling loads that require safety considerations. It has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is a block diagram showing a second embodiment, and FIG. 3 is a block diagram showing a conventional example. 24... Commercial 100V power line, 25... Terminal equipment,
26・41・42...Control equipment, 27.1. load, 2
9... Pilot lamp, 32... Communication means, 33
. . . i5 control means, 34 . . . load control means.

Claims (1)

[Claims] A terminal device that controls a load connected to itself and transmits a load status message after the control, and when receiving the load status message, transmits an ACK message as a response and also controls the load according to the information included in the received message. It is composed of a control device that displays the ON/OFF state of the device, and a transmission communication channel that transmits data between the terminal device and the control device, and the terminal device controls the load to turn on and transmits the load state as a result. If the terminal device cannot normally receive the ACK message sent by the control device as a response to the message, the terminal device reduces the load.
A transmission control method characterized by FF control.