JPH04119035A - Data transfer device - Google Patents

Abstract

PURPOSE:To surely detect duplicate setting of an address in a secondary station by allowing a primary station to output a fault signal when a content of a data signal and a check data are dissident. CONSTITUTION:A data signal is sent from an adaptor of a primary station 1A to adaptors 4, 4,... of secondary stations 1B, 1B,... while an address is designated. On the other hand, a transmission reception means 46 of each of the secondary stations 1B, 1B,... receives the data signal from the primary station 1A when the address is coincident with its own address and sends a data signal D to the primary station 1A in response to the data signal. In this case, a random number data addition means 47 of the secondary station 1B adds a random number data to the operating data to be sent to the primary station 1A and a check data addition means 48 adds a check data corresponding to the operating data and the random number data. Then a transmission reception means 45 of the primary station 1A receives the data signal from the secondary station 1B and a fault detection means 49 discriminates whether or not the data signal is normal.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data transmission device used in an air conditioner or the like, and particularly relates to countermeasures against incorrect address settings.

(Prior art) Conventionally, air conditioners have been developed using Japanese Patent Application Laid-open No.
As disclosed in the above publication, an outdoor control unit and a plurality of indoor control units are connected via signal lines, and there is also a remote control unit connected to the indoor control unit via signal lines.

When the outdoor control unit outputs a control signal to the specified indoor control unit, the indoor control unit sends the control signal back to the outdoor control unit.

Air conditioning operation is controlled by sequentially repeating transmission and reception between the outdoor control unit and the indoor control unit.

(Problems to be Solved by the Invention) In the air conditioner described above, transmission and reception between the outdoor control unit and the outdoor control unit is performed based on an address, and this address setting is performed using a rotary switch or the like. Therefore, there have been cases in which the indoor control units are set with emphasis on the same address.

However, in the past, there was a problem that duplicate settings could not be detected because there was no check function for address settings. In particular, since the indoor control unit performs operational control in response to command signals from the outdoor control unit, the indoor control unit transmits the same data to the outdoor control unit under the same operating conditions. As a result, it is impossible to detect duplicate settings of addresses, making it impossible to perform accurate operation control, resulting in a problem of lack of reliability.

The present invention has been made in view of this point, and is designed to detect duplicate address settings for secondary stations.
The purpose is to improve operational control accuracy.

(Means for solving the problem) In order to achieve the above object, the means taken by the present invention are as follows:
The next station sends a data signal to which random number data and check data are added to the primary station.

Specifically, as shown in FIG. 1, the measures taken by the invention according to claim (1) are as follows. ).

... is connected via the transmission line (5), and the primary station (1A)
and each secondary station (1B), (1B), ... is provided with address setting means (44) (44), ... for setting an address, while the primary station (1-A) is provided with a secondary station. (1B
), (1B), ... by specifying addresses and transmitting data signals, and receiving data signals from each secondary station (1B), (1B), ... is provided. , each of the above secondary stations (
1B), (1B),...+7 receive a data signal matching the address 5:iself0> from the primary station (1A), and in response to the data signal, the primary station (
1A) is intended for a data transmission device provided with a transmitting/receiving means (46) for transmitting a data signal.

Each of the secondary stations (1B) (1B), . . . includes a random number data addition means (47) for generating random numbers and adding random number data to the data signal to the primary station (]A);
While a check data adding means (48) for adding check data to the data signal for checking the data signal sent to the primary station (1A) is provided, the primary station (1A) is provided with a check data adding means (48) for checking the data signal sent to the primary station (1A). When a data signal is received from , (1, B), etc., it is determined whether the contents of the data signal match the check data or not, and when they do not match, an abnormality detection is performed to output an abnormal signal as address duplication setting. The configuration includes means (49).

In addition, the means taken by the invention according to claim (2) are the means taken by the primary station (1A) and the secondary station in the invention according to claim (1).
The next stations (1B), (1B), ... are the outdoor control units in the air conditioner. The configuration is set in unit (1).

(Operation) With the above configuration, in the invention according to claim (1), first, the primary station (1A) and each secondary station (1B).

(1B) Address setting means (44), (4
4) Set the address by... Specifically, in the invention according to claim (2), when addresses are set for the plurality of outdoor control units (1), (1), ... in the air conditioner, the outdoor control unit with the youngest address (
1) becomes the primary station (1A), and other outdoor control units (
1), (1), ... are secondary stations (1B), (1B
),…become.

Then, the primary station (1A) specifies an address and transmits a data signal to the secondary station (1B) by the transmitting/receiving means (45). ) receives the data signal. Subsequently, the transmitting/receiving means (46) of the secondary station (1B) is transmitted to the primary station (1B).
In response to the data signal of 1A), a data signal, eg, compressor-on operation data, is returned.

At that time, the random number data addition means (4) of the secondary station (1B)
7) adds random number data to the operating data, and a check data addition means (48) adds check data of the operating data and random number data to the operating data and random number data. When this data signal is received by the transmitting/receiving means (45) of the primary station (1A), the abnormality detecting means (49) determines whether or not the contents of the data signal, such as the operating data and random number data, match the check data. do. If they match, the abnormality detection means (49) treats the address settings as normal, and if they do not match, outputs an abnormality signal as address duplication settings. In other words, if duplicate addresses are set, two or more secondary stations (1B),
(1B), . . . transmit data signals at the same time, the operation data, random number data, and check data do not match, and the abnormality detection means (49) transmits an abnormality signal.

(Effect of the Invention) Therefore, according to the invention according to claim (1), the secondary stations (1B), (1B), etc. add random number data and check data to the data signal, and the primary station (1A), while the primary station (1A) outputs an abnormal signal if the content of the data signal and the check data do not match, so the secondary station (1B) (1B), ... Duplicate address settings can be detected reliably.

As a result, the above primary station (1A) is connected to each secondary station (1B), (
1B).

Since data signals can be accurately transmitted to ..., each secondary station (1B), (1B), etc. can perform various types of control accurately, improving control accuracy. It is possible to improve reliability.

Further, according to the invention according to claim (2), since data signals can be accurately transmitted and received between the outdoor control units (1), (1), ..., air conditioning operation can be controlled with high precision. Since it is possible to do this, it is possible to improve comfort.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

As shown in FIG. 2, (1), (1), . . . are a plurality of outdoor control units installed in an air conditioner, and each of the outdoor control units (1), (1)... Indoor control units (2), (2), ... are connected, and each indoor control unit (2), (2), (2),
... has a remote control (3), (3).

...is connected. Furthermore, each of the above outdoor control units (
1), (1), ... are outdoor unit actuators (1) equipped with a compressor, a four-way switching valve for cooling/heating switching, and a heat exchanger.
1), while the indoor control unit (2),
(2), . . . are provided with an actuator (not shown) for an indoor unit equipped with an expansion mechanism and a heat exchanger, and a refrigerant circulation circuit is constituted by the outdoor unit and the indoor unit. And the above remote control (3).

(3) Indoor control unit (2),
(2),... is received by the indoor control unit) (2)
, (2),... and the outdoor control unit (1).

(1), etc. It controls the air conditioning operation by sending and receiving control signals.

Each of the above outdoor control units) (1), (1),... is provided with a CPU (12), and the CPU (12)
is connected to the indoor control unit (2) via the input/output section (13).
is connected to exchange control signals such as operation signals with the indoor control unit (2).

Furthermore, each of the above outdoor control units) (1), (1).

... is provided with a memory (14) and an adapter (4), and the memory (14) and the adapter (11) are connected to the CPU (12). And the memory (14) and actuator (11)
sends and receives control signals to and from the CPU (12), and the memory (14)
) stores an operating program and operating data, while the actuator (11) is driven by a command signal from the CPU (12). In addition, the above CPU (
11) is connected to the adapter (4) via the human output section (15).

The above adapter (4) is attached to each outdoor control unit (1) (1)
, ..., and the outdoor control unit (1), (1), ... adapter (4) (4)
, . . . are connected via a transmission path (5).

And the adapters (4), (4).

... is a CPU (41) and two input/output units (42).

(43) and an address switch (44).

The CPU (41) of the adapter (4) is connected to the input/output section (42) of the main body side CPU (12) of the outdoor control unit (1).
(15), and sends and receives control signals such as a compressor operation request signal and an operation permission signal. Furthermore, the CPUs (41), (
41), . . . are configured to send and receive data signals (D) such as control signals shown in FIG. 3 via input/output sections (43), (43), .

In addition, each of the above address switches (44), (44)
,... constitute an address setting means for setting addresses for transmission between the outdoor control units (1), (1),..., and for example, the addresses are set in the order of "#0", "#1", "#2". The outdoor control unit (1) with the lowest address, for example, the outdoor control unit with the address "#0", is The control unit (1) is the primary station (1
A), an outdoor control unit (1) at another address,
(1), . . . are set as secondary stations (1B), (1B), .

Furthermore, the CPU of each of the above adapters (4), (4),...
(41) (41), . . . are provided with transmitting/receiving means (45), (46), . . . for mutually exchanging data signals. Then, the above primary station (1A) and secondary station (1A)
A polling addressing method is adopted between B), (1B), and so on, and when the transmitting/receiving means (45) of the primary station (1A) specifies an address and transmits a data signal, 2 of the specified address Next station (1B) transmitting/receiving means (
46) receives the data signal, transmits a data signal (D) to the primary station (1A) in response to the data signal, and transmits the data signal (D) to the primary station (1A).
The transmitting/receiving means (45) of the next station (1A) transmits the data signal (D
), and this transmission and reception operation is repeated.

Furthermore, the CPU (41) of the secondary station (1B) includes a random number data addition means (47) and a chain data addition means (
48), while the primary station (1A) CPU (
41) is provided with abnormality detection means (four). The random number data adding means (47) is connected to each secondary station (1B),
(1B), ・Each unique random number, for example, 4 bits “
0011" or "0100", and as shown in FIG. 3, random number data (D3
). Further, the check data adding means (48) is configured to add check data (D4), for example, CRC data, to the operation data (D2) and the random number data (D3), which are the contents of the data signal (D). has been done.

On the other hand, the abnormality detection means (49) of the primary station (1A) is
This is to detect duplicate address settings of the next station (1B), (1B), etc. Data signal (D) from the secondary station (1B)
When the receiver receives the operation data (D2) and random number data (D
B) and the check data (D4) are matched, and if they do not match, an abnormal signal is transmitted, and this abnormal signal is transmitted from the outdoor control unit (1) to the indoor control unit (2). The address is sent to the remote controller (3) via the remote controller (3), and the remote controller (3) displays a message indicating that the address is set to be duplicated. That is, for example, 2
If the same address is set for two secondary stations (1B) and (1B), it may not be possible to detect an abnormality using only the operation data (D2), or the two The random number data (DB) and (DB) are superimposed and do not match the check data (D4), so that an abnormality is detected.

Next, each of the above outdoor control units (1), (],).

The transmission operation between... will be explained.

First, an address is set for each outdoor control unit (1), (1), ... by the address switch (44), (44), ..., and either the outdoor control unit 0) with address "#0" or the primary station is set. (1A).

And, for example, each outdoor control unit) (1).

(1) When starting up sequentially every 5 seconds, the address “#
The compressor-on operation data (D2) is sequentially transmitted from the outdoor control unit (1) of "0" to the other outdoor control units (1), (1), etc.

That is, FIG. 4 is a control flow of the primary station (1A), and as shown in the control flow, in step STI, the adapter (4) of the primary station (1A) is connected to each secondary station (1B).
), (1B), ... adapter (4), (4)
A data signal is transmitted by specifying an address to , . . . . On the other hand, each of the above secondary stations (1B).

(1, 8), ... match its own address, the transmitting/receiving means (46) receives the data signal of the primary station (1A),
In response to the data signal, the data signal (D) is sent to the primary station (1
Send to A).

At that time, at the secondary station (1B), the random number data addition means (47
) or random number data (DB), and check data (D4) corresponding to the operation data (D2) and random number data (DB) is added by the check data adding means (48).

After that, the primary station (1A), in step ST2,
Transmitting/receiving means (
45) The receiver is removed, and in step ST3, the abnormality detection means (49) determines whether the data signal (D) is normal or not.

In other words, if the addresses of the secondary stations (1B), (1B), etc. are set accurately without duplication, the operation data (D2) and random number data (DB) match the check data (D4). Therefore, the abnormality detection means (49) outputs a coincidence signal, and the steps ST3 to DT4 are performed.
, the primary station (1A) performs normal processing and returns to step S.
I will be returning to TI.

On the other hand, if the secondary station (1B) has duplicate addresses set, for example, two secondary stations (1B).

(1B), the two secondary stations (1A) respond to the data signal from the primary station (1A).
1B) and (1B) will simultaneously return the data signal (D). At that time, the driving data (D2), for example,
If the compressor-on data is the same, duplicate address settings cannot be detected. However, each secondary station (1B).

(1B) has its own random number data (DB), (DB) added, so the primary station (1A) has two random number data (
DB), (DB) or is input as an AND signal. Then, whether the check data (D4) (D4) also becomes an AND signal or the check data (D4) is
), the operating data (D2), and the random number data (D4) do not match. Therefore, the above abnormality detection means (49
) outputs an abnormal signal, and steps ST3 to S
Moving to T5, the primary station (1A) performs abnormality processing, and returns to step STI.

Thereafter, the abnormality signal from the abnormality detection means (49) is transmitted from the main body side CPU (12) of the outdoor control unit (1) to the remote control (3) via the indoor control unit (2).
An error message indicating duplicate address settings will be displayed.

Therefore, the secondary stations (1B), (1B), etc. have random number data (D3) and check data (
D4) is added and transmitted to the primary station (1A), while 1
Since the next station (one person) outputs an abnormal signal when the contents of the data signal (D) and the check data (D4) do not match, the addresses at the second station (1B), (1B), etc. Duplicate settings can be reliably detected. As a result, the above primary station (1A) becomes each secondary station (1B),
Since the data signal (D) can be accurately transmitted to (1B)..., each secondary station (1B), (1
B) Various types of control can be performed accurately, control precision can be improved, and reliability can be improved.

Moreover, each of the above-mentioned outdoor control units (1), (1,).

Since data signals can be accurately transmitted and received between..., air conditioning operation can be controlled with high accuracy, and comfort can be improved.

In addition, in this embodiment, the primary station (1A) and the secondary station (1A)
B), (1B), ... are both outdoor control units (1)
In the invention of (), ), ..., the claim is), an outdoor control unit (1) and a plurality of indoor control units (
2), (2), ..., or a remote control (3) and a plurality of indoor control units (2), (
2),... may be configured.

Further, the invention according to claim (1) is not limited to air conditioners.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 4 show one embodiment of the present invention, FIG. 2 is a circuit block diagram of an air conditioner, FIG. 3 is a configuration diagram showing the contents of a data signal, and FIG. 4 is a diagram of a primary station. FIG. 3 is a control flow diagram showing control operations. (1)...Outdoor control unit (1A)...Primary station (1B)...Secondary station (4)...Adapter (5)...Patent fee transmission line (41)...CPU...Address switch, (46)... Transmitting/receiving means...Random number data addition means...Check data addition means...Anomaly detection means Applicant: Daikin Industries, Ltd. Patent attorney (1) 1 person (Figure 4): Outdoor control Unit (1A)・Primary station (5)・・Transmission line (12), (41)・・CPU (44)・・Address switch Sochi (45), (46)・Transmission/reception means (47)・・Random number Data addition means (48)...Check data addition means (49)...Irregularity detection means Fig.

Claims (2)

[Claims] (1) Multiple secondary stations (1A) for one primary station (1A)
B), (1B), ... are connected via the transmission line (5),
The primary station (1A) and each secondary station (1B), (1B),...
address setting means (44) for setting an address, (
44),... are provided, while the primary station (1A) is provided with secondary stations (1B), (1B),...
A transmitting/receiving means (45) is provided for transmitting a data signal by specifying an address to each secondary station (1B), and receiving data signals from each secondary station (1B), (1B), . . . 1B), (1B), ... have a primary station (1A
) from among the data signals that match its own address, and in response to the data signal, 1
Transmitting/receiving means (46) for transmitting data signals to the next station (1A)
), each of the secondary stations (1B), (1B), ... generates random numbers and adds random number data to the data signal sent to the primary station (1A). Random number data addition means (47) and primary station (1A)
The primary station (1A) is provided with check data adding means (48) for adding check data for checking the data signal to the data signal, while the primary station (1A) has secondary stations (1B), (1B)
When a data signal is received from ..., an abnormality detection means (49) is provided which determines whether the contents of the data signal match the check data or not, and outputs an abnormal signal as address duplication setting when they do not match. A data transmission device characterized by: (2) In the data transmission device according to claim (1), 1
The next station (1A) and the secondary stations (1B), (1B), ... are outdoor control units (1), (1), ... in the air conditioner.
A data transmission device characterized in that the primary station (1A) is set to the outdoor control unit (1) having the youngest address.