JPH0818597A - Address setting method and device - Google Patents

Abstract

PURPOSE:To set an address of a slave set automatically in the communication system where plural slave sets are connected in series and in branching with one mater set. CONSTITUTION:Each slave set 20 has an address setting function according to a command from a master set 10 and provided with a connection terminal for series connection and branch connection, 1st and 2nd switches 28, 29 are provided between the connection terminals and a switch is initialized to be in OFF state except for a slave set 20A closest to the master set. When the master set calls a slave set to set an address, a switch 28 of the slave set is closed. Thus, a succeeding slave set is called and it is repeated to provide a umber to slave sets in series connection sequentially. When no reply comes from the call, a switch 29 is closed in the order of slave sets provided with a number and a branched slave t 20G or the like is called to set an address.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an address setting method and apparatus in a communication system, and more particularly to an address setting method in a communication system in which a plurality of slave units are connected to one master unit in series or in parallel by communication lines. And equipment.

[0002]

2. Description of the Related Art A communication system in which one master unit and a plurality of slave units are connected by a communication line and communication is performed between the master unit and the slave units is, for example, air conditioning in buildings, lighting, disaster prevention, crime prevention, etc. Various studies have been conducted for application to a system for monitoring and operating a vehicle. In this case, a controller that controls various equipment such as an air conditioner serves as a slave, but it is necessary to set an individual address for each slave before using the communication system.

An address setting system is proposed in Japanese Patent Laid-Open No. 4-223633, in which the address setting is easily performed and the duplicate setting or forgetting of the setting of the same address is prevented. As shown in FIG. 8, this is because a plurality of slave units 520 are connected to one master unit 510 by the communication line 501.
In a serial communication system connected in series with each other, a switch circuit 530 for opening and closing a communication line between the slave units is provided between the slave units, and the master unit 510 is connected to each slave unit 520 through the communication line when the power is turned on. On the other hand, an address setting signal unique to each child device is transmitted.

Each slave unit 520 receives the address signal from the master unit 510 and completes the address setting to close the switch circuit 530 between the slave unit 520 and the next slave unit connected in series. The setting signal reaches the next slave. In the figure, 540 is a temperature sensor for measuring the temperature inside the room, and 550 is air conditioning equipment for cooling and heating. As a result, even if you do not set the hardware configuration with a DIP switch etc. for each slave unit, address settings will be automatically performed sequentially from the slave unit close to the master unit, and duplicate settings and setting leaks etc. Mistakes are prevented.

[0005]

However, the above-mentioned conventional address setting system is intended for a serial communication system in which a master unit and a slave unit are connected in series, and has a branch in the middle of a plurality of slave units. However, there is a problem that addresses cannot be automatically set in a communication system in which a slave unit is connected in parallel to a master unit. Therefore, in view of the above problems, the present invention provides an address setting method capable of automatically performing address setting without providing a dip switch or the like in each slave even in a communication system in which a slave branches from the middle. The purpose is to provide a device.

[0006]

For this reason, the present invention as set forth in claim 1 is directed to a series connection row comprising one master unit and a plurality of slave units serially connected to the master unit by communication lines. And a branch connection string composed of slave units branched and connected from any of the slave units connected in series, and an address setting method in a communication system in which communication is performed between the master unit and the slave unit. Call the slave unit in one of the series connection branch or the branch connection sequence in the order closer to the master unit, and send an address setting signal from the master unit to the slave unit that responded to the call to set the address to the slave unit. If there is no response to the call, call the slave unit on the other side of the series connection branch or branch connection sequence in the order closer to the master unit, and send the address setting signal from the master unit to set the address to the slave unit. Method and It was.

Further, in particular, the invention described in claim 2 is as shown in FIG.
As shown in FIG. 1, one master unit, a series connection string including a plurality of slave units connected to the master unit in series by communication lines, and a branch connection from any of the slave units connected in series And a branch connection sequence consisting of a slave unit, which is an address setting method in a communication system in which communication is performed between the master unit and the slave unit, wherein all the slave units in the serial connection sequence and the branch connection sequence are A first process 310 that initializes the address and sets each slave unit to the connection state with the master unit except the slave unit closest to the master unit, and a process of resetting the initialized address from the master unit. A second process 320 for calling the slave unit and checking whether there is a response, a third process 330 for transmitting an address setting signal to the slave unit that responded to the call, and the address setting in the slave unit that responded to the call. The child based on the signal Process 340 for changing the address of the slave to a new address, and after changing the address, the slave unit next to the slave unit in one of the series connection row or the branch connection row and the master unit are brought into conduction. Fifth processing 35
The second process 320 to the fifth process 350 having 0 and
Repeatedly set a new address to the slave unit of the connection row in sequence, and when there is no response to the call, the slave unit and the master unit in the other of the series connection row or the branch connection row and the master unit are brought into conduction. A sixth process 360 for
After the sixth process, the second process 320 to the fourth process 340 are sequentially executed to set the address to the slave unit of the other connection line, which is an address setting method. In the figure, the broken line shows the flow related to the slave unit in the other connection row.

According to a third aspect of the present invention, in particular, the branched slave unit is branched from any one of the slave units of the series connection (first order) and then a plurality of second slave units are connected in series with each other. When forming the next serial connection string, first, the second process 320 to the fifth process 350 are repeated for the slaves in the primary serial connection string to sequentially set new addresses, After the processing, the second processing to the fifth processing
By repeating the above process, new addresses are sequentially set to the slaves in the second series connection row.

Next, according to the present invention as set forth in claim 4, as shown in FIG. 2, one master unit 410 and a communication line 401 connected to the master unit.
And a branch connection string including a slave unit 430 connected by branching from any one of the slave units connected in series, An address setting device in a communication system in which communication is performed between a slave and a slave, wherein each slave has first, second and third connection terminals TI, TO and TB and a first slave.
Address setting control unit 424 connected to the connection terminal TI of
An address holding unit 425, a first switch S1 which is provided between the first connection terminal and the second connection terminal and between the first connection terminal and the third connection terminal and whose initial setting is OFF. And a second switch S2, and the series connection is formed by sequentially connecting the second connection terminal TO of the slave unit to the first connection terminal TI of the next slave unit, and the master unit 410.
The first connection terminal TI of the child device 420A closest to the parent device is connected to the parent device, and the branch connects the first connection terminal TI of the next child device to the third connection terminal TB of the child device connected in series. The master unit 410, which is formed by being connected, has a calling unit 411 for sequentially calling the slave units that are in conduction with the master unit, a setting command unit 412 for transmitting an address setting command, and the serial unit as a priority calling sequence in advance. When one of the connection string or the branch connection string is selected and set, and the selected connection string is the serial connection string, after setting the address in the slave unit, the first switch S1 of the slave unit is turned on and a response is sent. If there is not, the second switch S2 is turned on in the order of the slaves that have already been addressed, and if the selected connection string is a branch connection string, after setting the address in the slave,
While turning on the second switch S2 of the slave unit,
When there is no response, the switch command means 413 for outputting a control command for turning on the first switch S1 is provided, and the address setting control unit 424 of each of the slaves is configured by the setting command means 4
An address based on the address setting command from 12 is set and stored in the address holding unit 425, and
The first switch S1 and the second switch S2 are turned on according to a control command from the switch command means 413.
It was configured to do.

[0010]

According to the method of the present invention, first, the slave units in one of the series connection line and the branch connection line are called in the order closer to the master unit. For example, in a serial connection line, when a response is received from a slave unit, an address setting signal is transmitted from the master unit to the slave unit and an address is set in the slave unit. This is repeated and the slave units connected in series are sequentially addressed. As a result of the address setting up to the terminal device of the serial connection, if there is no response even when the call is made, the other device, that is, the child device in the branch connection sequence, is called next in the order closer to the parent device Send the address setting signal from the base unit to the machine,
The address is set to the child device. Addresses are set automatically by calling each slave unit from one of the series or branch connection lines in order to set the address,
Even if there is a branch, it is set without omission.

According to the method of claim 2, the addresses of all the slave units are initialized, the master unit calls the slave units with the initialized addresses, and sends an address setting signal to the slave units which responded to the slave units. Change the address to a new address.
After changing the address, the next slave unit and the master unit are brought into conduction. By repeating this, one of the slave units in the series connection line or the branch connection line is sequentially addressed. As a result of the address setting up to the terminal device at the end of the connection line, if there is no response even if a call is made, the connection between the child device and the base device on the other connection line is made conductive, and initialization is performed as above. The slave unit is called with the addressed address, and an address setting signal is transmitted to the slave unit that responded to change the address of the slave unit to a new address. As the address setting progresses, the number of slave units that become conductive with the master unit increases, but since the call from the master unit is performed with the initialized address, only one newly connected slave unit is extracted. , The child device whose address has already been changed is not affected and will not be duplicated.

According to the method of claim 3, when the branch connection string is composed of a plurality of slave units connected in series with each other, the call-to-address sequence is the same as for the plurality of slave units serially connected to the master unit. After the change, the process until the next slave unit and the master unit are brought into conduction is repeated, and new addresses are sequentially set in the branched slave units connected in series.

Next, in the apparatus of claim 4, when the calling unit 411 calls the parent device 410, the child device 420A closest to the parent device responds, and the address setting command is transmitted from the setting commanding unit 412. To be done. Cordless handset 42
In 0A, the address setting control unit 424 receives this and sets the address and stores it in the address holding unit 425. Then, for example, when the series connection line is selected as the priority call line, the switch command means 413 of the master unit.
In accordance with a control command from the address setting control unit 42
4 turns on the first switch S1, which causes the first,
The second connection terminals TI and TO are connected, and the next slave unit connected to the second connection terminal and the master unit are brought into conduction. The above-described operation is repeated in response to this new handset device for the next call. When there is no response in the serial connection, in the order of the slave units already addressed by the above,
Turn on the second switch S2 from the switch command means 413.
A control command is issued. As a result, the slave unit in the branch connection line is brought into conduction with the master unit, responds to the call, and the address setting control unit 424 sets the address based on the address setting command.

Since the slave units in the series connection train and the branch connection train are sequentially called and the addresses are set, the addresses are automatically set and even if there is a branch, the addresses are set without omission. Regarding the call from the base unit above,
First, the addresses of each slave unit are all initialized to the same fixed address value, the calling unit of the master unit specifies the fixed address value to call the slave unit, and the address setting control unit of the slave unit sets The fixed address value can be changed to a new address value in accordance with the address setting command from the command means.

[0015]

FIG. 3 is a system diagram showing an example of a communication system to which the present invention is applied. A plurality of slave units 20A, 20B, 20C, ... For one master unit 10 via the first communication line 90.
20E and 20F are connected in series, and the slave unit 20
B and 20E are respectively connected to slave units 20G to 20I, 20J, and 20K of the first branch train which are further branched. Further, the secondary units 20L, 20M and 20N of the secondary branch train are further branched and connected to the secondary units 20G and 20I. Similarly, a plurality of slave units 20O to 20Q are connected in series to the master unit 10 by a second communication line 90A, and a slave unit 20R is branched and connected to the slave unit 20O.

As shown in FIG. 4, the base unit 10 operates as a CP.
U11, a reception register 15 connected to the input terminal INP via the serial-parallel converter 14, and a transmission register 16 connected to the output terminal OUTP via the parallel-serial converter 17, the transmission register 16 and the reception register 15 being the CPU 11 Input terminal INP and output terminal OUTP
Is connected to the communication line 90. Also, input terminal INP
The output terminal OUTP is also connectable to the communication line 90A via the switch 18.

A keyboard 13 and a system program memory 12 are also connected to the CPU 11 so that overall control is performed. The system program memory 12 stores an address setting program together with the system program. Upon receiving the key input signal, the CPU 11 calls the address setting program from the system program memory 12 and executes the program. Address setting program is communication line 90, 9
By 0A, an individual address setting signal unique to each slave unit is transmitted.

As shown in FIG. 5, each slave unit has a master unit 1
Similar to 0, CPU 21 and system program memory 2
2, and a transmission register 26 and a reception register 25 connected to the CPU 21. The reception register 25 is connected to the input terminal INC via the serial-parallel converter 24, and the transmission register 26 outputs via the parallel-serial converter 27. Terminal OUTC
It is connected to the. In addition to this, the slave unit is provided with an address setting register 23 composed of a non-volatile memory, and holds the address given to itself.

Each slave unit has connection terminals TI, TO and TB, respectively. The connection terminal TI is connected to the connection terminal TO of the master unit or the master unit side, that is, the upstream side slave unit, and the connection terminal TO is connected to the connection terminal TI of the downstream side slave unit so that a serial communication system is formed. It is formed. Further, the connection terminal TI is connected to the connection terminal TB of the child device on the upstream side to form a branch train communication system. Input terminal I
NC and the output terminal OUTC are connected to the connection terminal TI, connected to the connection terminal TO via the switch 28, and connected to the connection terminal TB via the switch 29. The switches 28 and 29 are controlled by the CPU 21 to be ON (closed) and OFF (open). As a result, the connection terminal TI and the connection terminal TO can be connected by the switch 28, and the connection terminal TI and the connection terminal TB can be connected by the switch 29.

C operating based on the address setting program stored in the system program memory 12 described above
The PU 11 constitutes the address setting control unit of the invention, and the address setting register 23 constitutes the address holding unit.
Then, the switch 28 becomes the first switch S1 of the invention,
The switch 29 corresponds to the second switch S2.

Next, an address setting operation in the communication system configured as described above will be described. First, FIG.
Shows the flow of processing in each slave. First step 2
In 00, as the control value in each of the slave units,
Both the switches 28 and 29 are turned off, and the address value is initialized to 0 (zero). It should be noted that these initializations can be performed, for example, when the power supply of the communication system is turned on, or the initialization of the address value 0 and the like may be performed at the factory before shipping. . When the power is turned on, both the switches 28 and 29 are set to "OFF" when the address value = 0.

In step 201, it is checked by the received signal received at the input terminal INC via the connection terminal TI whether or not the child device itself is called by the parent device. The monitoring continues repeatedly while there is no call.
When the child machine is called, step 2
At 02, a response message is sent from the output terminal OUTC to the communication line via the connection terminal TI. After this step 20
At 3, it is checked whether or not an address setting command is received. When the instruction is received, the own address is changed to the designated address in step 204, the address is held in the address setting register, and the process proceeds to step 205.
If there is no address setting command, step 205 as it is.
Proceed to.

At step 205, the switch 28 is turned on.
It is checked whether or not a command to do so has been received, and if the command is received, the switch 28 in step 206 is received.
Turn on. As a result, the connection terminal TI and the connection terminal T
O and will be connected. After that, and when it is determined in step 205 that there is no ON command for the switch 28, the switch 29 is turned on in step 207.
It is checked whether or not a command to do so has been received, and when the command is received, the switch 29 in step 208 is received.
Turn on. As a result, the connection terminal TI and the connection terminal T
B will be connected. After this, or when there is no ON command for the switch 29 in the check in step 207, the process returns to step 201 and waits for the next call.

Targeting the child machine operating as described above,
Next, FIG. 7 shows a flow of processing in the master device 10. In this embodiment, after the power supply of the communication system is turned on, the address setting operation is started by key input from the keyboard 13, and the CPU 11 executes the address setting program. First, in step 101, a key input signal is received and a predetermined parameter is initialized. Here, the address variable N of the serial communication system and the branch train communication system is used.
1 and N2 are each set to 1, and the number B of the communication line to which the master unit is connected is set to 1.

In the base unit 10, the next step 102
Then, B = 1, that is, the slave unit having the address value “0” on the communication line 90 which is the first communication system is called. Then, in step 103, it is checked whether or not there is a response from the slave unit having the address value "0". At this time, in the communication system of FIG. 3, since the switches 28 and 29 of each slave unit are all turned off, it is the master unit that has the address value “0” and the communication circuit is connected to the master unit. 2 closest to
Only 0A. When there is a response from the slave unit 20A, in step 104, the CPU 11 sends an address setting signal from its output terminal OUTP to the slave unit 20A having the address value "0" to change the address to N1 (= 1). 90 out. As a result, the address of the slave unit 20A is set to N1 as described above.

Thereafter, in step 105, the address N1
A command to turn on the switch 28 is transmitted to the slave unit 20A which has become. Then, after incrementing N1 in step 106, the process returns to step 102. When the switch 28 of the slave unit 20A is turned on, the communication line 90 extends to the slave unit 20B, and the slave unit 20B responds to the call in step 102. By repeating the above, the slave units 20A to 20A in the serial communication system
Addresses 1 to 6 are numbered by F.

After that, the switch 28 of the child device 20F is turned on.
However, since there is no child device connected to the downstream side of the child device 20F, there is no response to the calling of the address 0, and the process proceeds from step 102 to step 107. Step 107
Then, N1 is compared with N2, and if the values are not the same, the process proceeds to step 108, and a command to turn ON the switch 29 is transmitted to the address N2, that is, the slave unit 20A having the address 1 here. And step 1
After incrementing N2 at 09, the process returns to step 102.

When the switch 29 of the slave unit 20A is turned on, the communication line 90 extends to the connection terminal TB of the slave unit 20A. However, since there is no cordless handset connected to the connection terminal TB of the cordless handset 20A, there is no response to the call of address 0, and the process proceeds from step 102 to step 107 and then to step 108.

In step 108, this time, a command for turning on the switch 29 is transmitted to the slave unit 20B having the address 2. When the switch 29 of the slave unit 20B is turned on, the communication line 90 branches from the slave unit 20B to the slave unit 20G, and the slave unit 20G responds to the call in the next step 102. As a result, the process proceeds from step 103 to step 104, and the CPU 11 sends an address setting signal for changing the address to N1 (= 7) to the slave unit 20G from the output terminal OUTP onto the communication line 90. As a result, the address of the child device 20G is set to N1. Thereafter, the same routine is repeated, and the addresses 7 to 9 are assigned to the slave units 20G to 20I of the primary branch train.

After that, in Steps 107 to 109 again from Step 102, by advancing the ON of the switch 29 while incrementing the address N2, N2 = 5 is reached and the slave unit 20J branched from the slave unit 20E is reached. The communication line 90 extends. Thus, the handset 20G
In the same manner as in the above case, the address N1 = 10 is assigned to the child device 20J.
Is set. In the same manner, addresses 11 to 14 are assigned to the slave units 20K to 20N.

In the system of the communication line 90, when the switches 28 and 29 in all the slave units are turned on and the slave unit having the address value "0" stops responding,
Since N1 = N2, step 107 to step 1
Go to 10. In step 110, the communication line order B is incremented and the numbered communication line is changed. In step 111, it is checked whether or not this new communication line exists, and if it exists, the process proceeds to step 102. In this embodiment, since there is a system of the second communication line 90A, the process returns to step 102 and the same processing as in the system of the first communication line 90 is performed, and the addresses 15-18 are assigned to the slave units 20O-20R. Numbered. After that, when it is confirmed in step 111 that there is no other communication line, the address setting process ends.

After setting the address, each slave unit is entirely controlled by the system program stored in the system program memory 22, and exchanges control information and data with the master unit via the reception register and the transmission register. Functions as a communication terminal. The same applies to the parent device. Further, similar to the conventional example, the slave unit is provided with a temperature input circuit, an output circuit for air conditioning equipment, etc. according to the application target such as an air conditioning controller. The above-mentioned steps 102 and 106 are calling means of the invention, steps 103 and 104 are setting instruction means, and steps 105 and 107 to 10
Reference numeral 9 constitutes a switch command means.

This embodiment is configured as described above, and in a communication system in which one master unit and a plurality of slave units are connected by a communication line, each slave unit has a connection terminal TI and TI via a switch. Connection terminals TO and TB connected to
And the connection terminals TO and TI of the slave units are connected to form a serial communication system, and the connection terminals T of the slave units are connected to each other.
By connecting B and TI to form a branch train communication system, sending an address setting signal from the master unit to the slave unit closest to the master unit to set the address, and turning on the switch of the slave unit, First, the slave units connected next to each other in the serial communication system are sequentially connected to the master unit to be numbered. Then, after the numbering on the serial communication system is completed, the slave units on the branch communication system are sequentially connected to the master unit for numbering. As a result, not only in the communication system serially connected to the master unit, but also in the communication system in which there is a branch in the middle of the slave unit, address setting is automatically performed sequentially from the slave unit close to the master unit, resulting in a setting error. It never happens. Further, since it is not necessary to provide a DIP switch or the like for address setting, there is an effect that it can be carried out at low cost and maintenance is easy.

Since each slave unit has a non-volatile memory or a memory backed up by a battery and holds each set address, once the address is set, it is normally initialized every time the slave unit is powered on. There is no need to repeat activation and address setting. In this case, when the power is turned on, both switches 28 and 29 of the slave unit to which an address other than 0 (zero) has already been set are turned on.

As a result, even when a failure occurs in the slave unit, for example, the operation can be started immediately after the countermeasure is taken. That is, if the power of the slave unit is turned off, the defective slave unit is removed, repaired, and then reattached, the address for the slave unit is already set and stored in the non-volatile memory. Similarly, since each has an individual address, it is possible to continue control without being affected by the entire system. Also, when replacing a faulty slave unit with a new slave unit, the power is turned off, the faulty slave unit is removed, the address stored in the slave unit is read through the interface, and the new slave unit is replaced. Address can be written and attached. Note that the main unit also has a non-volatile memory or a memory backed up by a battery so that the address assignment status is retained, so that it is not necessary to set the address again when the system is restarted after the power is turned off. .

In the above embodiment, after setting the address of each slave unit, the serial connection switch 28 is turned on to first perform the serial numbering on the communication system. Although 29 is turned on and the slave units on the communication system of the branch train are sequentially connected to the master unit for numbering, the priority calling train for numbering is not limited to this, and a serial system or branch train is used. It is possible to set in advance whether or not the system. That is, when giving priority to the communication system of the branch train, after setting the address in the slave unit, the second switch of the slave unit is turned on, and when there is no response, the first switch is set.
It suffices to turn on the switch. When a plurality of slave units are connected in series to the branch line after branching, the same process is repeated, and the second switch is turned on and the first switch is turned on in the terminal unit at the end. However, if there is no response, the first switch of the branch source slave unit of the branch train is turned on.

In the embodiment, all the slave units are provided with the connection terminals TO, TB or the switches 28, 29, but this is aimed at the uniformity of each slave unit as a component. However, these are not always necessary for the slave unit located at the extreme end of the communication system by connection, and can be omitted. Further, although the address setting operation is started by the key input from the keyboard 13 in the embodiment, the address setting operation may be automatically started by turning on the power of the communication system.

[0038]

As described above, according to the present invention, one master unit, a series connection string including a plurality of slave units connected to the master unit in series by communication lines, and the slave unit connected in series. In a communication system having a branch connection string consisting of a slave unit branched and connected from any of the above, in a communication system in which communication is performed between the master unit and the slave unit, first of one of the series connection string or the branch connection string. When the slave unit is called in the order closer to the master unit, and when there is a response from the slave unit, the master unit sends an address setting signal to the slave unit and sets the address to the slave unit repeatedly. , Next, the slave units in the other connection row are called in the order of proximity to the master unit, and an address setting signal is sent from the master unit to the slave unit that responded, and the address is set to that slave unit. Even if there is a branch Address not have the effect that is set.

Further, particularly, the addresses of all the slaves are initialized, and the connection with the master of each slave except the slave closest to the master is cut off, and the master uses the initialized address. The slave unit is called, and an address setting signal is sent to the slave unit that responded to change the address of the slave unit to a new address.After changing this address, the next slave unit and master unit in one connection line Repeatedly make the connection between the two, and if there is no response even after calling,
Next, when the slave unit and the master unit in the other connection row are set to the conductive state and the slave unit is called and the address is changed with the same initialized address as above, when the address setting progresses Even if the number of slaves that are in conduction with the machine increases, the call from the master is performed with the initialized address, so only one newly established slave is extracted and the same address is duplicated. Never be done. Further, even when the branch connection row is composed of a plurality of slave units connected in series with each other, by repeating the same steps as for a plurality of slave units serially connected to the master unit, A new address can be sequentially set to the child device.

In the address setting device of the present invention, in order to carry out the above method, each slave unit is configured to set and hold its own address by the address setting control unit and the address holding unit based on the address setting command from the parent unit. In addition, the connection terminals for series connection and branch connection of the slave units are provided, and the first and second switches are provided between these connection terminals. Then, each time the parent device sets the calling address of the child device, one of the first switch and the second switch of the child device is corresponding to the serial connection string or the branch connection string selected as the priority calling string. First, the control command to turn on is output, and the address setting of the slaves in the selected connection sequence is sequentially advanced. When there is no response to the call, the other switch is turned on in the order of the slaves that have already been addressed. So that it is electrically connected to the slave unit in the other connection row. As a result, the address is automatically set to each slave unit of the communication system having a branch with a simple configuration in which only two switches are provided in the slave unit.

[Brief description of drawings]

FIG. 1 is a diagram showing a flow of processing of the present invention.

FIG. 2 is a block diagram showing a configuration of the present invention.

FIG. 3 is a system diagram showing a communication system to which the present invention is applied.

FIG. 4 is a block diagram showing a configuration of a parent device in the embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a child device according to the embodiment of the present invention.

FIG. 6 is a flowchart showing the flow of processing in a child device.

FIG. 7 is a flowchart showing the flow of processing in the parent device.

FIG. 8 is a diagram showing a conventional example.

[Explanation of symbols]

 10 Master 11, 21 CPU 12, 22 System Program Memory 13 Keyboard 14, 24 Serializer 15, 25 Receive Register 16, 26 Transmit Register 17, 27 Parallelizer 18 Switch 20A-20R Slave 21 CPU 23 Address Setting register 28, 29 Switch 90, 90A Communication line 401 Communication line 410 Master unit 411 Calling unit 412 Setting command unit 413 Switch command unit 420, 430 Slave unit 424 Address setting control unit 425 Address holding unit 501 Communication line 510 Master unit 520 Slave unit Machine 530 Switch circuit 540 Temperature sensor 550 Air conditioning equipment INP input terminal INC input terminal OUTP output terminal OUTC output terminal S1 1st switch S2 2nd switch TI, TO, TB connection terminal

Claims (6)

[Claims] 1. A master unit, a series connection string composed of a plurality of slave units connected in series to the master unit by communication lines, and a branch from any one of the slave units connected in series. And a branch connection sequence composed of a slave unit, which is an address setting method in a communication system in which communication is performed between the master unit and the slave unit, wherein the slave unit in one of the serial connection sequence or the branch connection sequence is Calls are made in the order close to the base unit, the base unit repeatedly transmits an address setting signal to the handset that responded to the call and sets an address to the handset, and when there is no response to the call, the serial connection line or Call the slave unit on the other side of the branch connection sequence in the order of proximity to the master unit,
An address setting method characterized in that an address setting signal is transmitted from a master unit and an address is set in a slave unit. 2. A master unit, a series connection string composed of a plurality of slave units connected in series to the master unit by communication lines, and a branch from any one of the slave units connected in series. And a branch connection sequence consisting of a slave unit, which is an address setting method in a communication system in which communication is performed between the master unit and the slave unit, wherein all the slave units in the serial connection sequence and the branch connection sequence are The first process of initializing the address and disconnecting the connection of each child device with the parent device except the child device closest to the parent device; and the child of the initialized address from the parent device. A second step of calling the device and checking for a response, a third process of transmitting an address setting signal to the handset that responded to the call, and a handset that responded to the call based on the address setting signal. The new address of the cordless handset. A fourth process of changing to an address,
After the change of the address, there is a fifth process for bringing the slave unit next to the slave unit in one of the series connection line or the branch connection line and the master unit into a conductive state, and from the second process The fifth process is repeated to sequentially set new addresses to the slaves in the connection row, and when there is no response to the call, the slave and the master in the other of the series connection or the branch connection are connected to each other. A sixth process for bringing the switch into a conductive state, and after the sixth process, the second process to the fourth process are sequentially executed to set an address in the slave unit of the other connection line. Address setting method characterized by. 3. After branching from one master unit, a plurality of primary series-connected slave units connected to each other in series by communication lines to the master unit, and any one of the series-connected slave units. A method of setting an address in a communication system, comprising a plurality of secondary series-connected slave units connected in series with each other, in which communication is performed between a master unit and a slave unit. First, all addresses of the slave unit and the branched slave units of the secondary series connection are initialized, and the connection of each slave unit to the master unit is cut off except for the slave unit closest to the master unit. And a second process of calling the slave device of the initialized address from the master device and checking whether there is a response, and a third process of transmitting an address setting signal to the slave device that responded to the call. , In the slave unit that responded to the call, the address Fourth processing for changing the address of the slave unit to a new address based on the setting signal, and after the address is changed, the next slave unit in the series connection of the slave unit and the master unit are brought into conduction. The fifth process is repeated, and the second process to the fifth process are repeated to sequentially set new addresses to the slave units connected in series.
When there is no response to the call, it has a sixth process of bringing the branched slave unit and the master unit into a conductive state, and after the sixth process, repeats the second to fifth processes. And a new address is sequentially set to the branched secondary series connected slave units. 4. A master unit, a series connection row composed of a plurality of slave units serially connected to the master unit by a communication line, and a branch unit connected from any one of the slave units connected in series. An address setting device in a communication system in which communication is performed between a master unit and a slave unit, wherein each slave unit includes a first, a second, and a third slave unit. A connection terminal, an address setting control unit connected to the first connection terminal, an address holding unit, between the first connection terminal and the second connection terminal, and between the first connection terminal and the third connection terminal. A first switch and a second switch, which are provided and whose initial setting is turned off respectively, are provided, and the series connection sequentially connects the first connection terminal of the next slave unit to the second connection terminal of the slave unit. Formed by connecting the first connection terminal of the child device closest to the parent device to the parent device. And the branch is formed by connecting the first connection terminal of the next slave to the third connection terminal of the slave connected in series, and the master is a slave that is in conduction with the master. , A setting command means for transmitting an address setting command, and one of the serial connection string or the branch connection string is selected and set in advance as a priority calling string, and the selected connection string is the serial connection string. In this case, after setting the address in the slave unit, the first switch of the slave unit is turned on, and when there is no response, the second switch is turned on in the order of the slave units that have already been addressed.
N, and when the selected connection string is a branch connection string,
After the address is set in the slave unit, a switch command unit that outputs a control command to turn on the second switch of the slave unit and to turn on the first switch when there is no response is provided, and the address of each slave unit is provided. The setting control unit sets an address based on the address setting command from the setting command unit and stores the address in the address holding unit, and sets the first switch and the second switch according to the control command from the switch command unit. An address setting device, which is configured to be turned on. 5. The address of each slave unit is initialized to the same fixed address value, and the calling unit of the master unit calls the slave unit by designating the fixed address value, and the address setting control unit of the slave unit. 5. The address setting device according to claim 4, wherein said fixed address value is changed to a new address value in accordance with an address setting command from a setting command means. 6. When the slave unit of the branch connection train is composed of a plurality of slave units connected in series with each other, and the selected connection train is a branch connection train, the switch command means branches the branch unit. When there is no response after turning on the first switch in the slave unit at the end of the connection train, a control command for turning on the first switch of the branching slave unit in the branch connection train is output. The address setting device according to claim 4 or 5.