JPH03201108A - remote control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a remote control device for remotely controlling a gas water heater or the like.

2. Description of the Related Art Communication protocols conventionally used in gas water heaters will be explained based on FIG.

FIG. 5 is a conceptual diagram of a communication protocol when three remote controllers are connected to the main device. When any operation switch is pressed on remote control A, the change in status is transmitted to main unit 4.
(31). If the main device 4 can successfully receive the data, it returns an answer, ACK, to the remote control A (S2). In this state, the state of the remote control A is Remote controller B1 and remote controller C have not yet received the change, so remote controller A and remote controllers B and C have different displays as remote controller displays.

This is because if the destination address indicating the address of the transmission destination in the transmission data is different from the address setting of the transmission destination, even if the data is received, it is ignored without being imported. In order to make the display on all remote controllers A, B, and C disappear, the main device 4 sends the contents of the data received from remote controller A with the destination address set to remote controller B (B3), and remote controller B sends the data. If it is received correctly, the knack is returned to the main unit (S4), and then the main unit 4
sends the data received from remote controller A again with the destination address set to remote controller C (35)
, When remote control C receives the data correctly, it returns a nack (B6). By the above operations (Sl) to (B6), the communication when remote control A is operated is completed, and all remote controllers display the correct display. That's what happens.

Problems to be Solved by the Invention However, with the above configuration, several hundred milliseconds are required from when remote controller A is operated until the display on remote controller C changes, resulting in a very slow response. In addition, there are six opportunities to communicate for one operation (Sl) to (B6), and an error occurs during communication, causing data from remote control A to be incorrectly transmitted to remote control B and remote control C. It was possible.

Therefore, the present invention provides a quick response to remote control operations.
Moreover, the purpose is to provide a remote control device with high communication reliability.

Means for Solving the Problems To achieve the above object, the present invention provides a remote control control device, an address setting device for setting the address of the remote control, and a transmitting/receiving device for transmitting signals with other remote controllers and main device. In a configuration in which the transmitting/receiving device adds a NAC request address to the information transmitted from the device main body and the remote control, if the received signal is normal, the NAC request address in the received signal is the same as the setting of the address setting device.
a nack code transmitting means that transmits a nac code after signal acquisition if the nac request address does not match the setting of the address setting device, and does not return the nac code even after signal acquisition; In this case, the device has a NAC code transmitting means for transmitting a NAC code regardless of the NAC request address.

Operation The remote control device of the present invention adds a NAC request address to the transmitted and received data and captures the data no matter what the NAC request address is, thereby allowing communication between remote controllers without going through the main device, and allowing communication with other remote controllers. The response to operations and changes in the status of the main unit is fast. Furthermore, since opportunities for data communication are reduced, the reliability of communication is also improved.

EMBODIMENT A remote control device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of an embodiment of the present invention.

Three remote controllers, ie, remote controller A, remote controller B, and remote controller C, are connected to the main unit 4 via a two-core transmission cable 5. The remote control A has a nack code transmitting means 6a for exchanging signals with the main device 4 and other remote controllers.
I. A transmitting/receiving device 6 having a NAC code transmitting means 6at
a, a remote control control device 7a that controls switch input and display of the remote control, an address setting device 8a that determines the address of the remote control, a remote control operation section 9a, and a display section 10.
The remote controller B1 and the remote controller C have exactly the same components.

Address setting device 8as 8b, 8c are remote controllers A-C
Since it is necessary to change the address, the control device 7a,
The address is determined by changing the human power applied to 7b and 7c. Further, the RAMs 11a, llb, and llc are RAMs common to the transmitting/receiving devices 6a to 6c and the control devices 7a to 7C,
It can be read and written from either side.

FIG. 3 shows the packet structure of communication data. The communication data is a time-division serial signal transmission method, and includes a transmission address SA indicating the address of the transmission source, an ACK request address AA requesting confirmation of normal reception of the transmission, a control word CW indicating the type of data, and transmission information DATA. ,
and an error detection code CRC. The control word CW is set to 0 in the case of normal data, 2 in the case of an ACK code, and 3 in the case of a NACK code, so that the type of data can be identified.

FIG. 2 shows a schematic flowchart when a transmitting/receiving device equipped with an ACK code transmitting means and a NACK code transmitting means receives data in remote control A. When data is received (S7), the type of the data is first checked. However, if it is an acknowledge code or a nack code, there is no need to capture it, so it is ignored (S8). That is, it is checked whether the control word CW of the communication packet is 0.

Next, if the received data is normal data, an error detection code is calculated from the received data (S9), and it is confirmed whether the answer matches the error detection code CRC sent with the data (510); If the error detection codes match, it is assumed that normal data has been received, and the data is stored in RAM1.
1a (S11) 0 Next, check whether the ACK request address AA of the received and saved data matches the address set by the address setting device 8a, which is stored in advance in the RAM 11a by the control device 7. do. If the addresses match, the line will begin to be monitored (5
13) If there is no signal on the signal line for a certain period of time, fa
iltanochchi (314), send ack code (3
15), this ACK code is obtained by changing the control word CW of the received data to 2. The sending side completes one communication by receiving the acknowledge code. Further, if the ACK request address AA does not match the set address in (512), the reception ends immediately.

In other words, in this case, the data will be saved, but the ACK code will not be returned.

On the other hand, if the CRC calculation results do not match in (SIO), it is assumed that there is a reception error and the line is monitored (S16
), after confirming that there is no signal on the signal line for a certain period of time (SL?), transmits a NAC code (318). This NAC code uses the sending address SA and the ACK request address AA as addresses set by the address setting device 8a,
Change the control word CW to 3 and transmit the transmission information DATA.
This is a code with the part omitted and a CRC added. When the sender receives the NAC code, it retransmits the same data.

Next, FIG. 4 shows a conceptual diagram of the communication protocol of the present invention.As shown by ■, operations are performed with the remote control A,
When the data is sent (S19), the ACK request address AA of the communication packet at this time is the main device 4, so the main device 4 sends the ACK code (S2
0), remote controller B, and remote controller C do not transmit anything even after saving the data. In this way, all remote controllers can acquire data through one communication. Furthermore, as shown by ■, if remote controller B is unable to properly receive the data from remote controller A (321), remote controller B transmits a nack code, so remote controller A transmits the data again. At this time, if the main device 4 receives the data normally, it is possible that the ACK code and NACK code will collide, but the line monitoring timer time (S1
3) This can be prevented by adding a time difference to (S16). Also, as shown in ■, even if there is a change in the status of the main device 4 and data is sent, all remote controllers receive and receive the data at the same time and return an ACK code because the ACK request address is the set address. The remote control A is equal to .

Effects of the Invention With the above-described configuration, the remote control device of the present invention has a quick response to operations of other remote controllers and changes in the state of the main device, and almost no display deviation occurs between remote controllers. This reduces opportunities for data communication and improves communication reliability.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a transmitting/receiving device in an embodiment of the present invention, FIG. 2 is a schematic flowchart of a transmitting/receiving device in an embodiment of the present invention, FIG. 3 is a packet composition country of the communication data, and FIG. 4 is a system diagram of a transmitting/receiving device in an embodiment of the present invention. FIG. 5 is a conceptual diagram of the conventional communication protocol. 4...Main device, 5...Transmission cable, 6a, 6b, 6c...Transmitting/receiving device, 7 a1
7 bs 7 c...Remote control device, 8a
, 8b, 8c...address setting device, 9a. 9b. 9C...Remote control unit, 10a, 10b, 10cm...Display unit,
lla,,llb. 11c...RAM.

Claims (1)

[Claims] It is equipped with a remote control control device, an address setting device for setting the address of the remote control, and a transmitting/receiving device for transmitting signals with other remote controllers and the main device. If the received signal is normal, and the ACK request address in the received signal matches the setting of the address setting device, an ACK code is transmitted after the signal is captured, and the ACK request address matches the setting of the address setting device. The remote control device has an ACK code transmitting means which does not return an ACK code even after signal acquisition unless the address matches the ACK request address, and a NACK code transmitting means which transmits a NACK code regardless of the ACK request address if the received signal is abnormal.