CN104967700A - Software upgrade method and network address assignment method for controller of multi-connected system - Google Patents

Abstract

The present invention provides a software upgrade method and a network address allocation method for a controller of a multi-connected system, wherein the network address allocation method includes the controller identifier setting, and the binary code that can uniquely mark its identity set by the controller itself is set as Slave identifier; identifier registration and controller network address allocation, use the host controller on the RS485 network to scan all slave identifiers on the RS485 network, and assign a network address to the slave corresponding to the scanned slave identifier .

Description

Software upgrade method and network address assignment method for controller of multi-connected system

technical field

The invention relates to an automatic network address allocation and software upgrading method for a networked air conditioner controller

Background technique

A multi-connected system generally has multiple internal units and external units, and the centralized controller forms a single-layer or multi-layer RS485 bus network. There is a unique master and multiple slaves in each layer of the network. The internal unit is only a slave machine, the master machine can be a master machine or a slave machine, and the centralized controller is generally a master machine. An external machine may be the master of the network at this layer, but it may become a slave (or a master) in a higher-level network.

Restricted by the characteristics of RS485 (half-duplex), each slave must:

1. Possess a network unique identifier;

2. Register its identifier with the host as a network address.

The disadvantages of the above 2 steps are as follows:

Identifier setting is usually realized by dialing code/wire control/computer. This implementation method needs to be realized during on-site installation, which often causes the following problems:

1. Because the control board is located in the electric control box, the dial code on the control board or the port connected to the computer is not easy to operate and has potential safety hazards;

2. Operators need special training;

3. It is easy to make a wrong dial or heavy dial, and it is difficult to find once a wrong dial is made;

Register network address - each slave that has not been assigned an address needs to be powered on in sequence, which is less efficient.

The software on the air conditioner controller (outdoor unit, internal unit or integrated main controller) is solidified into the chip before leaving the factory; once the control board needs to be updated, the software needs to be upgraded. At present, software upgrades are generally implemented through chip simulation devices, but there are also problems such as low efficiency, high cost, and potential safety hazards for personnel.

Contents of the invention

The present invention is based on the network address allocation method of the internal and external machine controllers of the multi-line system, wherein multiple controllers are associated through the RS485 network, and the method includes:

Controller identifier setting, using the controller's own settings or the controller chip's own multi-digit binary number that can uniquely identify its identity is set as the slave identifier;

Identifier registration and controller network address allocation, use the host controller on the RS485 network to scan all the slave identifiers on the RS485 network, and assign network addresses to the slaves corresponding to the scanned slave identifiers.

In a preferred implementation of the network address allocation method according to the present invention, the scanning method is a Fibonacci allocation method.

According to the software upgrade method of the controller of the multi-connected system according to the embodiment of the present invention, it includes:

Use the above method to establish a single-layer or multi-layer RS485 network between the external machine and the internal machine corresponding to the external machine, and between the external machine and the external machine, and the computer can be connected at any position in the network;

Define the communication protocol and specify the serial port type;

broadcast on the RS485 network, and all controllers of the designated system enter the program update mode;

All controllers that receive the program update mode command enter the program update mode;

Utilize computer to search and display all controllers and corresponding addresses and information on the RS485 network;

Specify the controller address list to be upgraded and select the corresponding software file, and send it to the target controller by the computer;

After all the controllers are upgraded, the computer will issue a command to make the controllers in the system exit the program update mode and return to normal operation.

The embodiment of the present invention provides an automatic network address assignment and software upgrade method for a networked air conditioner controller, which avoids manual dialing operations and separate power-on operations, improves efficiency, and avoids errors.

Description of drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is a schematic diagram of an automatic network address allocation method for a controller of a multi-connection system according to an embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can obviously be implemented in many other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the protection scope of the present invention.

The automatic network address allocation method for the controllers of the multi-connected system is suitable for multiple controllers in the multi-connected system to associate through the RS485 network. The binary code of the identity is set as the slave identifier. The code set by the controller itself that can uniquely identify its identity can be but not limited to the chip serial number. For example, if the main chip is an STM32 series chip, each chip has a 96-bit globally unique code for identifying each chip. After the 96-bit code is defined, its lower 64-bit is used as a slave identifier, and the 64-bit is divided into two groups, each group is 32-bit. If the controller chip does not have an internal serial number, you can cooperate with the supplier of the control board. Each control board is written into a serial number when it leaves the factory. The length of the serial number is 24-bit, and then the controller generates a random 8- The bit sequence is combined into a 32-bit number sequence, in which the 8-bit random number sequence is the highest 8 bits, and the 24-bit number sequence is the lower 8 bits.

According to the automatic network address distribution method of the controller of the multi-connected system, it also includes identifier registration and controller network address distribution, utilizes the host controller on the RS485 network to scan all the slave identifiers on the RS485 network, and scans the scanned slaves The slave machine corresponding to the machine identifier is assigned a network address. In the following embodiments, the scanning method is described by taking the Fibonacci distribution method (Fibonacci (Fibonacci) search combined with depth-first search, the data structure adopts the improvement of the binary tree, and all data exists in the leaf nodes) as an example to reduce The number of heuristics during the scan. In the following embodiments, taking the internal and external machine network as an example, the external machine controller is the master, and the internal machine controller corresponding to the external machine is the slave machine. The slave machine identifier is 32 bits for address addressing, and the 64-bit address is Perform 2 32-bit address addressing. Unless otherwise specified, the internal machine is the controller of the internal machine, and the external machine is the controller of the external machine or a centralized controller corresponding to multiple external machines.

The Fibonacci function is expressed as follows:

F(0)=0

F(1)=1

F(n)=F(n-1)+F(n-2)n is an integer>=2

Combined with Figure 1, the algorithm of the addressing steps on the host (external machine) side is as follows

1. Initialize, let the controller in the system run to the addressing state.

2. Set variable n=47, Min=0, Max=F(n)=F(48);

3. Search the binary tree [Min, Max, n]

Step 3.1 // search for (n-2) part

{

    Max=Min+F(n-2)-1;

  The external unit sends Min and Max to the internal unit.

If (the external unit receives valid data within the specified time)

There is a unique internal machine between Min and Max, and the valid data is the physical address of this internal machine. The external machine assigns a network address to this internal machine, and step 3.1 ends;

If (no data received)

The external unit judges that there is no internal unit between Min and Max, so no address is allocated, and step 3.1 ends;

If (invalid and conflicting data received)

{

The external unit judges that between Min and Max, there is more than one indoor unit (most of the cases) or the reply of the only indoor unit is disturbed (occasionally).

Conduct a search as follows:

//Left part search Max=Min+F(n-2)-1;

m=n-2;

If(m>=3)

Go to Step 3 – Search Binary Tree [Min, Max, m];

If(m==2)//exit recursion

send[Min, Max];

              If there is a reply, 1 address will be assigned;

If there is a conflict, assign 2 addresses;

exit this loop;

If (m==1) //Exit recursion

                        If there is a reply, 1 address will be assigned;

exit this loop;

            }

}

Step 3.2 // search for (n-1) part

{

Min=Max-F(n-1)+1;

  The external unit sends Min and Max to the internal unit.

If (the external unit receives valid data within the specified time)

There is a unique internal machine between Min and Max, and the valid data is the physical address of this internal machine. The external machine assigns a network address to this internal machine, and step 3.2 ends;

If (no data received)

The external unit judges that there is no internal unit between Min and Max, so no address is allocated, and step 3.2 ends;

If (invalid and conflicting data received)

{

The external unit judges that between Min and Max, there is more than one indoor unit (most of the cases) or the reply of the only indoor unit is disturbed (occasionally).

Conduct a search as follows:

          //Right Part Search Min=Max-F(n-1)+1;

                                  p=n-1;

If(p>=3)

Go to step 3 - build a binary tree [Min, Max, p];

If(p==2)//exit recursion

send[Min, Max];

              If there is a reply, 1 address will be assigned;

If there is a conflict, assign 2 addresses;

exit this loop;

If (p==1) //Exit recursion

If there is a reply, an address will be assigned;

exit this loop;

            }

}

4. end

Corresponding to the addressing action of the master side, the response mode of the slave (internal unit) side is:

1. Initialization, the system controller is running in a normal state.

2. After receiving the external machine addressing command, enter the addressing state.

3. After receiving the two numbers Min and Max, compare whether its own serial number is between Min and Max, if yes, immediately send its own serial number to the external unit, otherwise keep silent and do not respond.

4. If it receives the address assignment command from the external machine, it will modify its own network address to the address assigned by the external machine, and exit the addressing state.

The aforementioned automatic addressing method can be implemented on the RS485 network. For a multi-connected system, a two-layer RS485 network can be established, which includes the internal and external machine network and the external machine network. The internal and external machine network includes the external machine and multiple internal machines corresponding to the external machine. machine, the external machine network includes multiple external machines. In the embodiment that the external machine network includes a centralized controller, the external machine controller refers to the centralized controller corresponding to the external machine. For the internal and external machine network, the external machine can be set as the master, and the internal machine can be set as the slave. For the external machine network, one of the external machine controllers or centralized controllers can be set as the master, and the rest are slaves. However, it will be understood in the following content that after the system enters the program update (IAP) mode, the master-slave relationship in the network may change.

When it is necessary to update the controller software, the update method according to the embodiment of the present invention is as follows.

1. Use computer software to define the corresponding communication protocol, and specify the type of serial port, such as bus port or wire controller port.

2. Broadcast on the RS485 network to instruct all controllers in the system to enter the program update (IAP) mode. Depending on where the computer is connected to the RS485 network, the broadcast path will be different, but the computer can be connected anywhere on the network.

In one embodiment of the present invention, when the computer is connected to the interface of the wiring controller of the internal machine, the internal machine broadcasts to the internal and external machine network to enter the IAP mode; the external machine on the same network broadcasts to other external machines and the centralized controller IAP instruction.

In one embodiment of the present invention, when the computer is connected to the bus of the internal and external machines, the address of the computer can be automatically set so that the computer obtains the right to speak on the bus, and broadcasts the IAP to the network of the internal and external machines, and the external machines on the same bus broadcast the IAP.

In one embodiment of the present invention, when the computer is connected to the interface of the external machine, the external machine broadcasts to the internal machine network to enter the program update (IAP) mode, and simultaneously broadcasts the IAP to the external machine and the centralized controller network.

In one embodiment of the present invention, when the computer is connected to the centralized controller, the centralized controller broadcasts the incoming IAP to the external machine network, and each external machine simultaneously broadcasts the IAP to its corresponding internal machine network.

In one embodiment of the present invention, when the computer is connected to the centralized controller and the bus of the external machine, the computer broadcasts to the external machine, the centralized controller network broadcasts into the IAP, and each external machine broadcasts to its corresponding internal machine network at the same time. IAP.

As can be seen from the foregoing, the IAP mode may cause changes in the host and slave in the network:

The internal unit connected to the computer becomes the master in the network of the internal and external units, and the external unit becomes the slave;

When the computer is connected to the bus of the internal and external units, the computer becomes the master, and the internal and external units become slaves;

·When the computer is connected to the external machine, the external machine is still the host computer;

The rest of the internal and external machine network hosts and slaves remain unchanged;

·The host in the external machine and centralized controller network is assumed by the external machine corresponding to the internal and external machine network to which the computer is connected, if the computer is not connected to the centralized controller.

3. All controllers (indoor unit, outdoor unit, centralized controller) that receive the IAP enter the program update (IAP) mode.

4. The computer searches and displays all the devices on the network and the corresponding addresses (the address is 16 bits, corresponding to the 2-layer network, the first 8 bits are the 8-bit address of the external machine where the external machine of the internal and external machine network is located, and the centralized controller network, The last 8 bits are the address) and information in the corresponding internal and external machine network.

When the computer is connected to the interface of the wiring controller of the internal machine, the internal machine searches for the 16-bit network address existing on the network of the internal and external machine. Then the external machine on this internal and external machine network searches on the network and collects 16 other external machines and their connected internal machine addresses. If the centralized controller exists, its 16 network addresses are also collected.

When the computer is connected to the interface of the wiring controller of the internal machine, the computer searches for the 16-bit network address existing on the network of the internal and external machine. Then the external machine on this internal and external machine network searches on the network and collects 16 other external machines and their connected internal machine addresses. If the centralized controller exists, its 16 network addresses are also collected.

When the computer is connected to the interface of the external machine, the external machine searches for the 16-bit network address existing on the network of the external machine. At the same time, the external machine searches and collects 16-bit addresses of other external machines and the connected internal machines on the network. If the centralized controller exists, its 16-bit network address is also collected.

When the computer is connected to the centralized controller, the centralized controller searches for the 16-bit network addresses of all external machines and the internal machines connected to them from the network of the external machines.

When the computer is connected to the bus of the external machine, the computer searches for the 16-bit addresses of all the external machines and the mainland they are connected to. If the centralized controller exists, its 16-bit network address is also collected.

5. The service personnel specify the address list of machines that need to be upgraded and select the corresponding update file, which is sent to the target controller by the computer.

In the step of updating the program, perform the following steps on the computer side:

If the computer is connected to the interface of the wiring controller of the internal machine, if the internal machine is updated, the program will be transmitted to the internal machine; if other controllers are updated, the program and target address list will be transmitted to the internal machine;

If the computer is on the internal and external machine bus, then transfer the program and target address list to the internal and external machine bus;

When the computer is connected to the interface of the external machine, if the external machine is updated, the program will be transmitted to the external machine; if other controllers are updated, the program and target address list will be transmitted to the external machine;

When the computer is connected to the external machine network, transfer the program and target address list to the external machine bus;

When the computer is connected to the centralized controller, if the centralized controller is updated, the program is transmitted to the centralized controller; if other controllers are updated, the program and the target address list are transmitted to the centralized controller.

In the step of updating the program, perform the following steps on the internal side:

If the built-in machine itself is in the target address of the update program, its own program is updated;

If it is not in the target address of the update program, and it is not directly connected to the computer, its own program will not be updated;

If it is not in the target address of the update program, and it is directly connected to the computer, its own program will not be updated, but the forwarding program and the target address of the update program will be sent to the internal and external machine network.

In the step of updating the program, perform the following steps on the external unit side:

If it is in the target address of the update program, its own program will be updated; if this machine is the host of the external machine network, and there are other external machines at the target address, then forward the program and the target address of the update program to the external machine network ;

If it is not in the target address of the update program, the program and the target address come from the internal and external machine network and the target address is only in its own internal and external machine network, then its own program will not be updated;

If the controller itself is not in the target address of the update program, the program and the target address come from the internal and external machine network (it is the host of the external machine network) and the target address is not in the controller that contains itself in the internal and external machine network, its own program will not be updated, but forwarded program and target address to the external machine network;

If it is not in the target address of the update program, the program and the target address come from a computer (it is the host of the external machine network) and the target address is only in the controller that contains itself in the internal and external machine network, then its own program will not be updated, but the program will be forwarded and the target address to the internal and external machine network;

If it is not in the target address of the update program, if the program and target address are sent by the host of the external machine network, and the target address has a controller in the internal and external machine network including itself, then its own program will not be updated; forward the program and target address The internal and external machine network connected to this external machine;

If it is not in the target address of the update program, if the program and target address are sent by the Master of the external machine network, and the target address does not include the controller in the internal and external machine network of itself, then its own program will not be updated, and the program and target address will be forwarded The external machine network connected to this external machine.

In the step of updating the program, perform the following steps on the centralized controller side:

If the self is in the target address of the update program, the program of the self is updated;

If it is not in the target address of the update program, and it is not the host of the external network, no action will be taken;

If it is not in the target address of the update program, and it is the host of the external machine network, it will send the program and target address to all the external machines in the external machine network.

6. Finally, after all equipment upgrades are completed, the computer sends a command, and the system controller exits the IAP mode and returns to normal operation.

Through the foregoing description, it can be understood that the embodiments of the present invention have the following advantages:

On the premise of ensuring the uniqueness of the slave identifier and the RS485 bus, the automatic allocation of the slave address is realized by software, which can ensure the unique address on the network;

For a multi-layer network system like VRF, a computer can be accessed at any point in the multi-layer network, and the program of any device in the system can be updated.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, all fall within the scope of protection defined by the claims of the present invention.

Claims (5)

1. the network address distribution method of the controller of multi-line system, wherein a plurality of controllers are associated by RS485 network, it is characterized in that the method comprises: Controller identifier setting, use the binary code set by the controller itself that can uniquely mark its identity to set as the slave identifier; Identifier registration and controller network address allocation, use the host controller on the RS485 network to scan all the slave identifiers on the RS485 network, and assign network addresses to the slaves corresponding to the scanned slave identifiers. 2. The method according to claim 1, wherein the scanning method is a Fibonacci distribution method. 3. The method according to claim 1, wherein the code is a chip serial number of the internal machine controller. 4. The method according to claim 1, wherein the code is randomly generated by the controller. 5. The software upgrade method of the controller of multi-line system, it is characterized in that, comprises: Use the method described in any one of claims 1 to 4 to set up two layers of RS485 networks between the external machine and the internal machine corresponding to the external machine, and between the external machine and the external machine, so that the computer can be in any position of the network access; Use the computer to define the corresponding communication protocol and specify the serial port type; broadcast on the RS485 network, and all controllers of the command system enter the program update mode; All controllers that receive the program update mode command enter the program update mode; Utilize computer to search and display all controllers and corresponding addresses and information on the RS485 network; Specify the controller address list to be upgraded and select the corresponding software file, and send it to the target controller by the computer; After all the controllers are upgraded, the computer will issue a command to make the controllers in the system exit the program update mode and return to normal operation.