JPH0652880B2 - Transmission control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission control device among devices arranged in a distributed manner.

2. Description of the Related Art In recent years, a transmission control method for centrally controlling a plurality of devices and connecting each device with an electrical communication network for the purpose of monitoring and monitoring the current state of the device and transmitting control signals to each other. Have been reported. As an example, there is a method of using a commercial 100V power line as a transmission communication path to control a load in a general household. This is because the signal voltage for communication with a frequency sufficiently higher than this is superimposed on the AC voltage of the power line to communicate between each device.Because special wiring for control is unnecessary, the labor and cost associated with installation are reduced. Has a characteristic that is small.

Here, the equipment is a load to be controlled and a load state detection function for detecting the state of the load is energized (hereinafter referred to as ON).
It is a combination of a terminal device having a load control function for controlling either non-energization (hereinafter referred to as OFF), a communication function for transmitting / receiving a control signal to / from another device, and a local station address setting function. Also, as another type of device, a communication function for transmitting and receiving control signals to and from each device, a control signal generating function for generating ON / OFF control signals to be transmitted to each device, and whether each device is in the ON state or the OFF state There is a control device having a monitor display function for displaying, a partner station address setting function corresponding to each device, and a self station address setting function.

A transmission control method using a power line will be described below with reference to the drawings.

FIG. 2 is a block diagram of a conventional transmission control method using a power line. Reference numeral 1 is a commercial 100V power line, which is in a general household. The devices 8 and 9 are a combination of loads 4 and 5 and terminal devices 2 and 3, respectively, and are connected to the power line 1. The terminal devices 2 and 3 have the load state detection function, the load control function, the communication function and the own station address setting function as described above, and detect and control the ON / OFF of the loads 4 and 5 combined with themselves. Also, the power line 1 is used as a transmission communication path to communicate with other devices. At this time, the own station address setting means 6 and 7 set the own station address. On the other hand, the control device 10 is a type of device, and the power line 1
It has a communication function, control signal generation function, monitor display function, own station address setting function and partner station address setting function as described above. Reference numeral 11 is a local station address setting means. Then, by pressing the load control switch 16 to 19 corresponding to the load to be controlled, the control device 10 causes the partner station address setting means 12 to 1 corresponding to the switch.
The ON / OFF control command is sent to the terminal device set by 5 with its own address. The terminal device detects and controls it, and attaches its status to the control device 1
Send to 0. In response to this, the control device 10 displays 20 to 23 on the monitor corresponding to the transmitted local address.

Through the series of operations described above, the load status is controlled and monitored as desired.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, the partner station address setting means is set by the DIP switch corresponding to each of the monitor display and the load control switch. Therefore, the number of switches becomes enormous, which is not appropriate in terms of cost and miniaturization.

The present invention solves the above problems and stops the DIP switch.
An IC memory, which is an EAROM (E ² PROM) or a RAM with a backup, is adopted to provide a sophisticated transmission control device capable of holding normal data for a long period of time.

Means for Solving the Problems In order to achieve this object, a transmission control device of the present invention is a terminal device for controlling a load by a received signal, a control device for transmitting a signal for controlling the terminal device, It is composed of a commercial power line which is a bidirectional transmission communication path between the terminal device and the control device, and the control device has a plurality of blocks corresponding to storing a plurality of partner station addresses.
Each block has a storage means composed of a plurality of words, a writing means for writing an address and a one's complement of the address as data in a unit of one word in the storage means, and a block in the storage means for reading each word unit. Read-out means to output,
Data judging means for judging whether the data in units of one word from the reading means satisfies the address and the one's complement of the address to judge whether the data is normal data or abnormal data; It is composed of an arithmetic processing means for controlling to write the normal data into the word of the abnormal data only when the normal data and the abnormal data are mixed.

With this configuration, when writing the partner station address of each terminal equipment of the control device to the IC memory, one partner station address is composed of a plurality of words (this is called one block), and each word is an address. And the address are written by the writing means so that the one's complement of the address is obtained. Further, when reading is performed, the block of the storage means in which the address of the partner station at the desired read location is stored is read word by word. After that, by judging whether or not the read one-word data is the address and the one's complement of the address, it is judged by the data judging means whether the data is normal data or abnormal data, and the result and the data are arithmetic processing means. Pass to. The arithmetic processing means receives it and controls the writing means to write the normal data for each word in which the abnormal data is detected only when the normal data and the abnormal data are mixed in the same block. From the above, it can be determined whether the data obtained by the reading means can be adopted after judging whether the data is normal or abnormal.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a block diagram of a transmission control device according to an embodiment of the present invention. A device 27 and a control device 38 are connected to the commercial 100V power line 24. The device 27 is a terminal device 2 that performs ON / OFF control of the load 26 and load, and transmits the load status.
It is a combination of 5 and. The terminal device 25 has its own station address setting means 28 as described in the conventional example. On the other hand, the control device 38 sets its own station address setting means 30, a load control switch 32 of this control device, a monitor display 33 corresponding to this, and a partner station to the terminal device 25 which associates these. As a device for storing an address, a writing unit 34, a reading unit 35,
Storage means 36, data determination means 37, normal / read / write motor changeover switch 39, arithmetic processing means 31 for controlling these means, and communication means 2 for communicating with the terminal device 25.
9 and 9. The storage means 36 has a plurality of blocks for storing data (in this embodiment, the address of the partner station) that needs to be retained even when the power is cut off,
One block is composed of a plurality of words for storing the same contents. The writing means 34 stores the destination station address and the destination station address of 1 in the storage means 36.
One word with the complement of is written as one unit. The reading means 35 reads the data of the storage means 36 word by word. The data determining means 37 is the reading means 3
It is checked whether the 1 word obtained by 5 is the data and the 1's complement of the data, and it is determined whether the data is normal data or abnormal data. The normal read / write mode selector switch 39
Is a switch for selecting a mode for the storage means 36.

The normal operation in the embodiment of the present invention (when normal is selected by the normal / read / write mode changeover switch) is exactly the same as that of the conventional example, and therefore its explanation is omitted. Here, only the operation of storing the partner station address of the control device 38 and reading the stored data will be described as a means for solving the problem.

First, the writing procedure will be described. Write is selected by the normal / read / write mode changeover switch 39, the local station address setting means 30 is set to the address of the partner station to be set, and the load control switch 32 at the location corresponding to it is pressed. As a result, the partner station address and the one's complement value of the partner station address are written in the memory means 36 through the writing means 34 in all the words of the block corresponding to the load control switch 32.
The arithmetic processing means 31 performs the above control.

Next, the reading procedure is shown. When the partner station address of the control device 38 becomes unknown (for example, when the control device 38 is powered on) or when reading is selected by the normal / read / write mode selection switch 39 and the load control switch 32 is pressed, the load is loaded. All the words of the block corresponding to the control switch 32 are sequentially read out by the storage means 3 through the storage means 3.
Read from 6. Then, it is determined whether or not the data of each word at this time is the companion station address and the one's complement of the companion station address.
It judges by and it reports to the arithmetic processing means. Then, only when the normal data and the abnormal data are mixed in the same block, the normal data is written into the storage means 36 through the writing means 34 in the word of the abnormal data. The arithmetic processing means 31 performs the above control.

Here, the number of terminal devices (: n) and the same data storage number (: m ≧ 2) may be arbitrary, and the own station address setting means 30 may be included in the storage means 36.

Further, the storage means, here, specifically, is EA ROM (= E
² PROM) or IC memory such as RAM with backup.

As described above, according to the present invention, by having the writing means, the reading means, the storing means, the data judging means, and the arithmetic processing means, the cost can be reduced and the size can be reduced as compared with the conventional dip switch, and the inside of the storing means can be achieved. Is (address + address 1
Complementary data) is used as one word, and is composed of a plurality of blocks having the same content. Therefore, when the reading means reads data in units of one word, normal data or abnormal data is read in units of one word. It is possible to judge whether or not the abnormal data is mixed in one block of data, and the normal data is controlled to be written. Therefore, the normal data can be retained in the storage means for a long time, the reliability is high, and the data is semi-permanently. It becomes possible to retain data, and its practical effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional example. 24 ... Electric power line, 25 ... Terminal device, 31 ... Arithmetic processing means, 34 ... Writing means, 35 ... Reading means, 36
...... Memory means, 37 …… Data determination means, 38 …… Control device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinji Nakamura, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-56-139043

Claims (1)

[Claims] 1. A terminal device for controlling a load according to a received signal, a control device for transmitting a signal for controlling the terminal device, and a bidirectional transmission communication path between the terminal device and the control device. The control device has a plurality of blocks corresponding to storing a plurality of partner station addresses, and one block includes a plurality of words, and the storage means has an address and an address. Of 1
Writing means for writing the complement of 1 as a word unit data, a reading means for reading a block of the storage means for each word unit, and a word unit data from the reading means is an address and an address 1 Data determining means for determining whether data is normal data or abnormal data by determining whether or not it is a complement of 0, and a word of abnormal data is included only when normal data and abnormal data are mixed in one block. A transmission control device having arithmetic processing means for performing control such as writing normal data.