JPS60235558A - Signal transmission system - Google Patents

Abstract

PURPOSE:To attain ease of a wiring work by using a transmission line in common for plural signal transmitters controlled by the polling selecting system. CONSTITUTION:A signal transmitter of the solar system comprising a master station (solar hot water supply equipment 2) and a slave station (solar hot water supply remote controller 9) transmits a data from the master station to the slave station according to the polling selecting system and transmits a signal packet to request the data from the slave station. The solar hot water supply equipment remote controller 9 responds to it and transmits a signal packet to the solar hot water supply equipment 2. The master station transmits the signal packet to transfer the right of use of the line to the boiler system and abandons the use of the line until a line transfer signal comes from the boiler system next.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for transmitting data between a plurality of sets of signal transmission devices in which line control is performed using a polling selection method in communication between a master station and at least one slave station. This invention relates to a signal transmission system that can share lines.

Conventional configuration and its problems In general, the polling selection method is often used as a line control method for remotely controlling equipment such as water heaters that have a combustion part for gas, oil, etc. using a remote controller. Since the selecting method allows cyclic signal transmission, even if erroneous data is received during transmission, the next new data can immediately arrive and replace the previous erroneous data. This is because it has the advantage that operations based on incorrect data do not continue for long periods of time, and is preferred as a line control method for remote control of equipment that requires reliability.

By the way, conventionally, when multiple sets of signal transmission devices controlled by the poll link selecting method are installed, the transmission lines must be wired separately for each signal transmission device, which is very inconvenient. It was the economy. FIG. 8 shows the above conventional example, and shows a solar system,
The two signal transmission devices of the boiler system use separate transmission lines 12a and 12b, respectively.

Purpose of the Invention The present invention aims to provide an economical signal transmission system in which the transmission lines of a plurality of signal transmission devices controlled by a polling/selecting method are shared by one transmission line, and the wiring work is easy. The purpose is

Structure of the Invention The present invention provides a means for acquiring the right to use a transmission line, a means for communicating with at least one slave station using a polling/selecting method, and a means for acquiring the right to use the transmission line for other signal transmission. It is composed of one or more sets of signal transmission devices consisting of a master station having means for transferring information to other devices, one or more sets of signal transmission devices including its slave stations, and a transmission line shared between the one or more sets of signal transmission devices.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Figure 1 shows
This is a hot water supply system that uses hot water heated by a solar system, adjusts the temperature with a boiler system, and supplies it to baths, showers, faucets, etc.

In the figure, 1 is a solar collector, and 2 is a solar water heater having a hot water storage tank, which functions to store thermal energy collected from the solar collector 1 in the hot water storage tank. Further, 9 is a remote control for the solar water heater for remotely controlling the solar water heater 2 from the kitchen or the like. These solar collector 1, solar water heater 2, and solar water heater remote control 9 constitute a solar system.

Next, 3 is a gas or oil water heater, and when the temperature of the water coming out of the solar water heater 2 is lower than the desired temperature, it burns scum or oil to raise the temperature of the water. It supplies hot water at a desired temperature to faucets 6 and 7 in bathrooms and bathrooms. 8 is a remote control for the bath, 10 is a remote control for the kitchen faucet, 11 is a remote control for the faucet in the second floor washroom,
In either case, the gas or oil water heater 3 is remotely controlled in order to obtain the desired hot water temperature at each hot water supply terminal. These gas or oil water heaters 3 and remote controllers 8, 10 and 11 constitute a boiler system.

12 is a transmission line for transmitting signals, and the solar water heater 2 and its remote controller 9 and the gas or oil water heater 3 and its remote controllers 8, 10.11 share this transmission line 12 as a bus. It is.

FIG. 2 shows the solar water heater 2 and the gas or oil water heater 3.
The procedure for signal transmission when each of the remote controllers 8 to 11 is used as a terminal for signal transmission is shown. Figures a and b show the timing when the signal transmission device on the solar system side, in which the solar water heater 2 is the master station and the solar water heater remote control 9 is the slave station, communicates using the polling/selecting method. be. 13 is a signal packet for transmitting data from the master station on the solar system side to the slave station and requesting data from the slave station. In response, the slave station, ie, the remote control 9 for the solar water heater, sends a signal packet indicated by 14 to the master station, ie, the solar water heater 2. When the master station receives this,
A signal packet 15 is sent to transfer the right to use the transmission line, that is, the line, to the boiler system side, and the use of the line is abandoned until the next line transfer signal is received from the boiler system side.

Next, c ”-f in the same figure shows the scum or petroleum water heater 3 as the master station.
This figure shows the timing when the signal transmission device on the boiler system side, which has remote controllers for gas or oil water heaters as slave stations, communicates using the polling/selecting method. The master station on the boiler system side is on standby until the line transfer signal 15 is sent from the solar system side, and only after detecting the line transfer signal 15 does it communicate with the boiler slave station A (for example, a remote control for a bath). Send signal packet 16. Boiler slave station A receives this and transmits a signal packet 17 to the boiler master station. After this, Wheeler's parent station was Boiler slave station B.

A similar communication is carried out with C, and finally, a line transfer signal 18 is sent to give the right to use the line to the solar system side, and the use of the line is abandoned until the next line transfer signal is received from the solar system side.

Next, FIG. 3 shows the signal transmission procedure when the solar system is installed alone. That is, the present invention provides a signal transmission system that can operate with a solar system alone or a boiler system alone.

In the figure, after the master station on the solar system side sends the line transfer signal 15 to the boiler system side, if the boiler system side does not start signal transmission within the TW waiting time, the solar system side sends the line transfer signal 15 to the boiler system side. It assumes that the other station does not exist, acquires the right to use the line again, and encourages the slave stations on the solar system side to communicate.

FIG. 4 shows an example of a signal packet configuration, and FIG. 4a shows a packet used during communication between a master station and a slave station, and FIG. 4 shows a packet configuration of a line transfer signal. Packet code 19 in the figure indicates information such as whether this packet is addressed from the master station to the slave station or sent from the slave station to the master station, and whether it is a line transfer signal or not. be. Furthermore, if there are multiple systems, the system address indicates to which system the right to use the line will be transferred.

Next, FIGS. 5 and 6 show a schematic flow of the signal transmission procedure in the master station and slave station of each system. The steps described for each processing block are
As the contents are the same as those already explained in Figures 3 and 3, a detailed explanation will be omitted, but in the outline flow at the master station in Figure 5, the contents of 20 to 25 are for acquiring the right to use the transmission line, that is, the line. Steps 26 to 30 are steps for a system that has acquired the right to use the line to transmit signals using a polling/selecting method, and Step 31 is a procedure for transferring the right to use the line to another system. It shows. These procedures actually exist in the form programmed into the ROM section of the transmission microcomputer in the hardware embodiment shown in FIG. 7, and are essentially means for executing each procedure. can be considered to be configured mainly around the transmission microcomputer.

In the figure, reference numeral 32 couples the transmission line 12 with a receiving circuit 33 and a transmitting circuit 34, and a coupling circuit 36 for transmitting and receiving signals is an address setting circuit for setting the address of each terminal.
37 is an application circuit that controls each terminal.

Effects of the Invention As is clear from the detailed explanation above, the present invention allows at least one set of system devices operating in the polling/selecting method to share one transmission line, so that a long transmission line can be connected to each system device. There is no need to install each system separately, making wiring work much easier, and multiple system devices can be installed without damaging the aesthetics of the house.

In addition, since it is possible to operate one system device alone, we are able to provide system products that are extremely flexible, such as allowing you to gradually upgrade the system without installing the entire system at once. It makes it possible.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a hot water supply system consisting of a solar system and a hot water system using the present invention, Figures 2 and 3 are timing diagrams showing the procedure for transmitting the same part of the signal, and Figure 4 is the configuration of the same signal packet. 5 and 6 are schematic flowcharts showing the procedure of signal transmission, FIG. 7 is a hardware configuration diagram of each terminal, and FIG. 8 is a configuration diagram of a conventional hot water supply system. Tosola collector, 2 Solar feeder, 3 Waste or oil water heater, 8, 10.11 Remote control for waste or oil water heater, 9 Remote control for solar water heater, 12 Transmission line. Name of agent: Patent attorney Toshio Nakao and 1 other person'S
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Claims (1)

[Claims] One transmission line is shared by at least one signal transmission device, and the signal transmission device uses a polling selection method in communication with at least one slave station as a means for acquiring the right to use the transmission line. A signal transmission system comprising a master station having means for performing line control and means for transferring the right to use the transmission line to another signal transmission device, and the at least one slave station.