JP3110293B2 - Watt hour meter with communication function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a watt-hour meter with a communication function used when an automatic meter reading system is constructed together with a central device.

[0002]

2. Description of the Related Art In order to perform automatic meter reading of a large number of watt-hour meters installed in a customer's house, it is necessary to set a unique address for each watt-hour meter with a communication function. Go to each installation location of the installed watt hour meter with communication function, read and write the address given at the factory at the time of manufacture to the watt hour meter with communication function on the layout drawing of the watt hour meter, The customer name and the address of the watt-hour meter with a communication function corresponding to the customer are registered.

[0003]

In the above-mentioned work for designating a watt-hour meter with a communication function for each customer, if an address entry error or the like occurs by a worker, the site is again checked to confirm the address. You have to go to the watt hour meter and it is inefficient.

[0004] An object of the present invention is to solve the above-mentioned problems, to omit the work of setting a unique address at the time of manufacturing,
An object of the present invention is to provide a watt-hour meter with a communication function for minimizing on-site adjustment work by minimizing on-site work of the watt-hour meter with a communication function and making it difficult for human error to occur.

[0005]

Means for Solving the Problems To achieve the above object, according to the present invention, in a watt-hour meter with a communication function having a function of transmitting and receiving signals to and from a central device, an address setting operation means is operated. As a result, an address setting mode is set. In the address setting mode, address data sent from the central device is received and set as a unique address , and an address determination signal is sent to the central device.
Is transmitted to the user.

[0006]

FIG. 1 is a block diagram of a watt-hour meter with a communication function according to an embodiment of the present invention.

The watt-hour meter with communication function 1 measures the power consumed by the power load L via the voltage transformer PT and the current transformer CT, which is originally provided in the watt-hour meter with communication function. Power / frequency conversion means 2 for converting to a frequency proportional to the power, a microcomputer 3 for performing all calculations and processes in the watt hour meter including the measurement processing of the power amount, and a storage means 4 for storing data such as measured amounts and addresses. Data transmission / reception means 5 for transmitting / receiving a data signal to / from the central unit via the communication line 13 and a power supply circuit 6 for supplying power to these units. It has an address setting operation means 7 operated to set its own address.

FIG. 2 is a perspective external view of a watt hour meter with a communication function, and FIG.
Of the address setting push button switch 8
Is provided on a terminal board 10 provided below the main body 9 of the watt-hour meter 1 with a communication function. FIG. 2A shows a state in which a terminal cover (not shown) has been removed.

The address setting switch may be of a non-contact type. FIG. 2B shows an example of such a case in which an address setting light or magnetic switch 11 is provided on the front face of the main body 12 of the power meter 1 having a communication function. It is shown that it is attached to.

FIG. 3 is a diagram showing an automatic meter reading system including a watt hour meter with a communication function. A large number of watt-hour meters 1 with a communication function are connected to a central unit 14 constituted by a personal computer or a workstation via a communication line 13.
, An automatic meter reading system is configured.

The data transmitted and received between the watt-hour meter with communication function 1 and the central unit 14 include a measured value of power amount, a model name, a transformation ratio, a measurement date and time, and a state of the watt-hour meter (meter reading mode, address setting mode). ), And an address.

Hereinafter, the watt hour meter 1 with the communication function is
The address setting operation in the automatic meter reading system configured with the communication line 4 and the communication line 13 will be described.

First, FIGS. 4 and 5 are flowcharts of an operation for setting an address for the watt hour meter 1 with a communication function under the initiative of the central unit 14. FIG.
FIG. 5 is an operation flowchart of the watt-hour meter 1 with the communication function.

When the operation mode of the central unit 14 is set to the address setting mode, this is discriminated in step 1 of FIG. 4, and in step 2, a series of installation work is completed. It is determined whether or not the address is set for the first watt-hour meter of the group of the meter 1
In the case of setting an address for the first watt-hour meter, in step 3, a predetermined start address i = n corresponding to the first watt-hour meter with a communication function to be set is set for the watt-hour meter 1 with a communication function. Continue sending as address setting command signal. In this case, take a certain time limit in step 4,
In step 5, if the address determination signal from the watt hour meter with communication function 1 is not received within the predetermined time limit, the process returns to step 3 and repeats the transmission of the address setting command signal. When the address determination signal is received from the watt-hour meter 1 with the communication function, the process proceeds to step 6, where it is determined whether or not the predetermined number of cases scheduled to be set at that time has been completed.

Now, if the first case is completed and two or more cases are to be set at the same time, the process proceeds to step 7 where i = n + 1 is set as the address to be set in the next watt-hour meter 1 with a communication function.
And the address data is changed by +1 and transmitted as an address setting command signal to the watt-hour meter with communication function 1 in the same manner as in the first case, and a fixed time period is set in step 8 and a predetermined time period is set in step 9 If the address determination signal from the watt hour meter with communication function 1 is not received, the process returns to step 7 to repeat the transmission of the address setting command signal. When the address determination signal from the watt-hour meter with communication function 1 is received, the process proceeds to step 6, where it is determined whether or not the predetermined number of cases scheduled to be set at that time has been completed.

Thereafter, when this is repeated and it is determined in step 6 that the predetermined number of set items is completed, the address setting operation is completed, the central device 14 returns to the original state, and the address setting mode is released. Then, the process shifts to the normal meter reading mode of step 10.

On the other hand, in FIG. 5, the watt-hour meter with communication function 1 receives an address setting command signal transmitted continuously for a fixed time in the address setting mode of the central unit 14, and sets it as a unique address. Figure 2
The address setting mode is set by pressing the address setting push button switch 8 of FIG. 2A or by inputting a light or magnetic setting signal to the address setting light or magnetic switch 11 of FIG. Then, this is discriminated in step 11, a fixed time limit is set in step 12, and in step 13, the microcomputer 3 receives and processes the address data sent from the central unit 14 via the data transmitting / receiving means 5. , Is stored in the storage means 4 as the unique address set in step 14, and at the same time, an address determination signal is returned to the central unit 14.

In the watt hour meter 1 with the communication function, if address data is not received from the central unit 14 within the predetermined time period in step 13, the address setting operation is performed again after the predetermined time period ends. If the mode is not the address setting mode, the flow shifts to the normal weighing mode in step S15.

Before setting the address, the central unit 14 prepares a list of consumers in the order of addresses in advance.
The list is registered, and the list is given to the worker in the field in advance, and the address setting operation on the field is performed according to the list. Therefore, in the central device 14, the customer and the installed watt-hour meter with a communication function are registered in one-to-one correspondence.

FIGS. 6 and 7 show a watt hour meter 1 with a communication function.
6 is a flowchart of an operation for setting an address on the watt hour meter 1 with a communication function under the initiative of FIG. 6, FIG. 6 is a flowchart of an operation on the central unit 14 side, and FIG. It is.

In FIG. 7, as in the case described above, FIG.
The address setting mode is set by pressing the address setting push button switch 8 in (a) or by inputting a light or magnetic setting signal to the address setting light or magnetic switch 11 in FIG. Then, this is determined in step 21, and the watt hour meter with communication function 1 sends an address request signal to the central device 14 in step 22.

Thereafter, the watt-hour meter with communication function 1 waits for address data to be received from the central unit 14 for a fixed time period in step 23, and when this data is received in step 24, proceeds to step 25. Then, by the operation of the microcomputer 3, the address is stored in the storage means 4.

If the address data is not received from the central unit 14 within a certain time limit, the process returns to step 22 to send an address request signal to the central unit 14 again.

If the address setting operation is not performed, the process shifts to the normal weighing mode in step 26.

On the other hand, in FIG. 6, when the central unit 14 receives an address request signal from the watt-hour meter with communication function 1 in step 31, it is determined in step 32 whether or not it is the first request. If it is the first case, step 33
With the given address data i = n as the setting command signal,
Until an address determination signal is received from the watt-hour meter, transmission to the watt-hour meter with communication function 1 is continued for a certain time in step 34.

The watt-hour meter with communication function 1 receives the address data in step 24 of FIG. 7, stores the address in its own storage means 4 in step 25, and sends an address determination signal to the central unit 14. Therefore, central device 14 confirms the reception of the address determination signal in step 35 of FIG. 6, and returns to step 31.

Next, when an address request signal from the next watt-hour meter with communication function 1 is received, it is determined in step 32 that the address is the second or later, and in step 37, the address i = n +
In accordance with the order of the address request signals coming from the watt hour meter with communication function 1, 2, 3,... When the transmission is performed and the address determination signal from the watt-hour meter is received in step 39, the address setting operation for the watt-hour meter is terminated each time, and the process shifts to the normal meter reading mode in step 36.

[0028]

As described above, according to the present invention, the address setting mode is set by operating the address setting operation means, and the address data transmitted from the central unit is received in the address setting mode. And set it as a unique address and send the address confirmation signal
Since the transmission to the central device, the work of setting a unique address at the time of manufacturing can be omitted,
The on-site work of the watt-hour meter with a communication function can be reduced as much as possible, and the on-site adjustment work can be shortened, and the occurrence of human error can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of a watt hour meter with a communication function according to an embodiment of the present invention.

FIG. 2 is a perspective external view of the watt hour meter with a communication function.

FIG. 3 is a diagram showing an automatic meter reading system including a watt hour meter with a communication function.

FIG. 4 is an operation flowchart of the central unit for performing address setting for the watt-hour meter with a communication function under the initiative of the central unit by the automatic meter reading system of FIG. 3;

FIG. 5 is an operation flowchart of the watt-hour meter with communication function for setting an address for the watt-hour meter with communication function under the initiative of the central device by the automatic meter reading system of FIG. 3;

FIG. 6 is an operation flowchart of a central device for setting an address for a watt-hour meter with a communication function by the watt-hour meter by the automatic meter reading system of FIG. 3;

FIG. 7 is an operation flowchart of the watt-hour meter with communication function for setting an address for the watt-hour meter with communication function by the watt-hour meter by the automatic meter reading system of FIG. 3;

[Explanation of Signs] 1 Wattmeter with communication function 2 Power / frequency conversion means 3 Microcomputer (processing means) 4 Storage means 5 Data transmission / reception means 6 Power supply circuit 7 Address setting operation means 8 Address setting push button switch 9 Main body 10 Terminal block 11 Optical or magnetic switch for address setting 12 Main body 13 Communication line 14 Central unit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-242389 (JP, A) JP-A-4-353771 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01R 11/00-11/66 G01R 21/00-22/04

Claims (3)

(57) [Claims] In a watt-hour meter with a communication function having a function of transmitting and receiving signals to and from a central device, an address setting mode is set by operating an address setting operation means. Receives address data sent from the device, sets it as a unique address, and sends an address determination signal to the central device.
A watt-hour meter with a communication function, characterized by transmitting . 2. The watt hour meter with a communication function according to claim 1, wherein said address setting operation means is an address setting switch. 3. A watt-hour meter with a communication function having a function of transmitting / receiving a signal to / from a central unit, an address setting operation means for setting an address setting mode by being operated, and sent from the central unit. The address data is received, and the unique address in which the received address data is set is set.
Transmission / reception means for transmitting an address determination signal to the central device when stored as a dress, processing means for performing processing in the address setting mode, and storage means for storing the received address data as a set unique address A watt-hour meter with a communication function, comprising: