CN103036754A - Communication system and communication method of multi-online air-conditioner - Google Patents
Communication system and communication method of multi-online air-conditioner Download PDFInfo
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- CN103036754A CN103036754A CN2012104787943A CN201210478794A CN103036754A CN 103036754 A CN103036754 A CN 103036754A CN 2012104787943 A CN2012104787943 A CN 2012104787943A CN 201210478794 A CN201210478794 A CN 201210478794A CN 103036754 A CN103036754 A CN 103036754A
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Abstract
The invention discloses a communication system and a communication method of a multi-online air conditioner. Inner machines connected on a communication bus and with only address marking information are detected and recorded by the inner machines. The inner machines receive broadcast data frames sent by an outer machine and send responding data frames according to an address order in sequence. On the condition that unchangeableness of the prior communication speed and reliability are guaranteed, communication efficiency of the inner machines and the outer machine is increased and communication time is shortened by means of the communication method of the multi-online air conditioner.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of multi-gang air-conditioner communication system and communication means.
Background technology
Multi-online air-conditioning system only just can be realized centralized management to many indoor sets with an off-premises station, has that indoor set is independently controlled, used flexibly, favorable expandability, good looking appearance, the advantage such as little takes up room.Outer machine of multi-online air-conditioning system can connect machine in the 1-128 platform by communication bus.Because many communication chips are without the automatic competition mechanism (such as MM1192) of posting a letter, can not two and above chip send data to bus simultaneously, otherwise can cause the entanglement of communication bus data.For guaranteeing communication reliability, the asynchronous half-duplex communication mode is adopted in inside and outside machine communication usually.The communication bus sequential often adopts a broadcast mode, namely outer owner is moving send the Frame that contains unique interior machine address after, the interior machine that only has address therewith to be complementary is replied, and sends the Frame of machine in this.Can do not sent any data toward bus by the interior machine of outer machine program request.This kind communication mode can guarantee that communication bus takes up an official post and one constantly only have an interior machine or outer machine sending data, can not cause the bus obstruction.
Existing asynchronous communication means shape as:
The outer machine of the outer machine-Nei machine 1--outer machine of Nei machine 2--Nei machine 3-... the outer machine of the outer machine-Nei machine 1--outer machine of Nei machine 2--Nei machine 3-... although use this kind some broadcast mode can guarantee the reliability of communicating by letter, but the communication mode of this question-response has consumed a large amount of call duration times.Outer machine is in inquiry during machine data, must send first the Frame that program request contains machine address in this, then the interior machine of corresponding address just can be replied the transmission data, because the non real-time property that call duration time causes, run action and the state delay of whole system can be caused, some can be had a strong impact on to the relatively normal operation of harsh system of time requirement.
For above problem, this programme has proposed the method for work of machine in a kind of multi-gang air-conditioner, outer machine and interior machine, outer machine, to solve program request communication mode length consuming time in the prior art, problem that communication efficiency is low.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of communication means of multi-online air-conditioning system, the method is guaranteeing existing communication speed (baud rate, usually hardware determines) on the basis of constant and communication reliability, improved inside and outside machine communication efficiency, shorten call duration time.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of communication means of multi-gang air-conditioner, described multi-gang air-conditioner comprise outer machine and at least two interior machines that link to each other with described outer machine by communication bus, and this communication means comprises,
S1: all the interior machines with unique address identification information that connect on interior machine testing and the record communication bus;
S2: interior machine receives broadcast data frame;
S3: current all interior machines that do not send responsive data frame judge whether communication bus free time reach the first default communication bus free time threshold value, as reach execution in step S4;
S4: whether interior machine is judged in the interior machine address that does not send responsive data frame in all minimum, in this way, and execution in step S5, otherwise, execution in step S6;
Step S5: send responsive data frame;
S6: judge whether communication bus is idle, such as the free time, execution in step S7; Otherwise, again detect communication bus free time, execution in step S3.
S7: judge whether communication bus free time reach default second communication bus free time threshold value, as reach execution in step S4;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value.
Broadcast data frame is to be sent according to default third communication bus free time threshold value by outer machine among the described step S2, specifically comprise, after machine in all sends the response data frame end, outer machine judges whether communication bus free time reaches default third communication bus free time threshold value, as reach, outer machine sends broadcast data frame again;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value, and described third communication free time threshold value is greater than described second communication bus free time threshold value.
Correspondingly, the present invention discloses a kind of communication system of multi-gang air-conditioner, and described multi-gang air-conditioner comprises outer machine and at least two interior machines that link to each other with described outer machine by communication bus, it is characterized in that described interior machine comprises
The record memory module, all the interior machines with unique address identification information that are used for connecting on interior machine testing and the record communication bus;
Receiver module is used for interior machine and receives broadcast data frame;
The first judge module is used for current all interior machines that do not send responsive data frame and judges whether communication bus free time reach the first default communication bus free time threshold value, as reaches, and is processed by the second judge module;
The second judge module, whether from the interior machine address that in all do not send responsive data frame minimum, in this way, processed by sending module if being used for interior machine judgement; Otherwise, processed by the 3rd judge module;
Sending module is used for sending responsive data frame;
The 3rd judge module is used for judging whether communication bus is idle, such as the free time, processed by the 4th judge module, otherwise, again detect communication bus free time, by described the first judge module processing;
The 4th judge module is used for judging whether communication bus free time reach default second communication bus free time threshold value, as reaches, by described the second judge module processing;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value.
Described outer machine comprises:
Judge module is used for behind machine transmission response data frame end in all, judges whether communication bus free time reach default third communication bus free time threshold value, as reaches, and is processed by sending module;
Sending module is used for sending broadcast data frame.
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value, and described third communication bus free time threshold value is greater than described second communication bus free time threshold value.
Technical scheme of the present invention, the time that sends Frame by external machine and interior machine manages, after machine sends broadcast data frame outside, interior machine sends responsive data frame successively according to sequence of addresses, change the communication pattern between outer machine and interior machine, on the basis that guarantees the constant and communication reliability of existing communication speed, improved inside and outside machine communication efficiency, shorten call duration time.
Description of drawings
Fig. 1 is the communication means flow chart of multi-gang air-conditioner of the present invention;
Fig. 2 is the schematic diagram of the transmitting time of the inside and outside machine data frame of multi-gang air-conditioner of the present invention;
The communication means flow chart of the multi-gang air-conditioner that Fig. 3 provides for first embodiment of the invention;
Fig. 4 is the structured flowchart of multi-gang air-conditioner communication system of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the communication means flow chart of multi-gang air-conditioner of the present invention.Multi-gang air-conditioner comprises outer machine and at least two interior machines that are connected by communication bus with described outer machine.As shown in Figure 1, the method comprises the steps:
Step 101: all the interior machines with unique address identification information that connect on interior machine testing and the record communication bus.
In multi-online air-conditioning system, an outer machine is connected by communication bus with some interior machines, and wherein, every interior machine has unique mailing address as identification information.Machine sends the broadcast data frame that carries the unique address identification information in all to communication bus, after through the bus communication Address Confirmation, every interior machine can both detect all inside and outside machines that connect on the communication bus, every interior machine with connect on the communication bus that detects other in the information such as address of machine be saved in the microprocessor chip RAM district of interior machine self.
Step 102: interior machine receives broadcast data frame.
Interior machine is behind the broadcast data frame that receives outer machine transmission, and the moment that the internal machine of system sends responsive data frame manages.The first communication bus free time threshold value t1 and second communication bus free time threshold value t2 that interior machine sends responsive data frame at first are set, wherein, satisfy following relation between the first communication bus free time threshold value t1, the second communication bus free time threshold value t2:
t2>t1。
When interior machine sends that responsive data frame determines according to the communication bus free time that detects and default the first communication bus free time threshold value t1 and second communication bus free time threshold value t2.
Described broadcast data frame is to be sent according to default third communication bus free time threshold value t3 by outer machine, specifically comprise, after machine in all sends the response data frame end, outer machine judges whether communication bus free time reaches default third communication bus free time threshold value t3, as reach, outer machine sends broadcast data frame again; Otherwise, continue to judge whether communication bus free time reaches default third communication bus free time threshold value t3.
Wherein, the relation between described t1, t2 and the t3 satisfies: t3〉t2〉t1.
In whole communication sequential, system sets inside and outside machine according to communication bus free time and when sends Frame.In the present embodiment, system determines that according to a communication bus default third communication bus free time threshold value t3 of free time outer machine sends the moment of Frame, when communication bus free time reached default the first communication bus free time threshold value t3, the moving Frame that sends of outer owner was to communication bus.Wherein, outer machine sends Frame by broadcast mode.
Step 103: current all interior machines that do not send responsive data frame judge whether communication bus free time reach the first default communication bus free time threshold value, as reach execution in step 104; Otherwise, continue execution in step 103.
Step 104: whether interior machine is judged in the interior machine address that does not send responsive data frame in all minimum, in this way, and execution in step 105, otherwise, execution in step 106.
Step 105: send responsive data frame.
When communication bus free time reaches default the first communication bus free time threshold value t1, every interior machine is according to the address identification message of machine in all of self processor chips RAM district storage, judge the interior machine of address minimum in all interior machines that do not send Frame, interior machine by the address minimum enters the transmission state, sends responsive data frame;
Step 106: judge whether communication bus is idle, such as the free time, execution in step 107; Otherwise, again detect communication bus free time, execution in step 103.
Machine misses current the first communication bus free time threshold value t1 and constantly sends Frame in other, judge whether communication bus is idle, detecting has had data (the interior machine of current address minimum is sending Frame) on the communication bus, communication bus is in busy condition, whether idle, namely need next the first communication bus free time threshold value t1 and second communication bus free time threshold value t2 reclocking if need to again detect communication bus.Wherein, the interior machine Frame that whenever receives once machines in other or outer machine all can rejudge communication bus free time and whether reaches the first default communication bus free time threshold value t1.Repeat the step that above-mentioned interior machine sends responsive data frame, until machine sends the response data frame end successively according to sequence of addresses in all, every interior machine sends Frame by sequence of addresses successively according to the first default communication bus free time threshold interval in the whole communication sequential.
Step 107: judge whether communication bus free time reach default second communication bus free time threshold value, as reach execution in step 104; Otherwise execution in step 106.
Machine misses current the first communication bus free time threshold value t1 and constantly sends Frame in other, judge whether communication bus is idle, such as the free time, wait for according to default second communication bus free time threshold value t2, need to wait for that communication bus free time arrival second communication bus free time threshold value t2 could send constantly.
After outer machine examination measured in all that connect on the communication bus machine and sends the response data frame end, outer machine testing communication bus free time, outer machine initiatively sent Frame again when reaching default third communication bus free time threshold value t3.Interior machine is when sending Frame according to sequence of addresses, and the interior machine information of the current minimum by internal machine record carries out zero clearing or initialization, with guarantee every take turns judge in the machine address hour can not make mistakes, the interior machine from the address minimum begins to send Frame all the time.
The machine communication mode need not to have guaranteed arbitrary moment on the basis that changes hardware and guarantee communication reliability inside and outside this kind, can only have a unique interior machine to send data toward bus on the bus, has improved communication efficiency, has shortened call duration time.
Fig. 2 is the schematic diagram of the transmitting time of the inside and outside machine data frame of multi-online air-conditioning system of the present invention.As shown in Figure 2, in whole communication sequential, the comparative result of the communication bus free time that outer machine basis detects and default third communication bus free time threshold value t3 determines when the transmission broadcast data frame; When interior machine receives the Frame that outer machine send, machine is set the first communication bus free time threshold value t1 and second communication bus free time threshold value t2 simultaneously in all, do not send in the interior machine of responsive data frame at all, when every interior machine examination measures bus free time when reaching t1, begin to judge that whether all do not send address minimum in the interior machine for oneself.If so, machine then begins to send (supposing that lowest address is No1) in this, namely constantly begins to send responsive data frame at t1; Other interior machines that do not send (suppose that the address is No2, No3, No4 ...) find that the current address wheel sends less than oneself, can miss t1 delivery time point, need to wait for that arriving delivery time point t2 could send.Send conflicting of producing when having avoided like this with No1.
Machine is before waiting for arrival t2 in other, detecting has had data (being that No1 is sending at this moment) on the bus, communication bus is in busy condition, need again testbus whether idle, namely need to restart timing to the first communication bus free time threshold value t1 and second communication bus free time threshold value t2.Only have after No1 is sent completely, machine (No2 in other, No3, No4 ...) just detect communication bus free time and whether reach default the first communication bus free time threshold value t1 and the idle threshold value t2 of second communication bus time, the interior machine No1 that has been sent completely no longer sends, and the first communication bus free time threshold value t1 and second communication bus free time threshold value t2 are no longer judged.
(No2, No3, No4 when the communication bus free time arrives t1 again ... can detect simultaneously), at the interior machine No2 that residue does not send, No3, No4 ... in, every interior machine begins to judge that whether all do not send address minimum in the interior machine for oneself.The address that is at this moment No2 is minimum, and NO2 begins to send, and the interior machine (NO3/NO4) that other do not send can miss t1 constantly, needs to wait for that arriving t2 could send.
Repeat above-mentioned forwarding step, until machine all is sent in all.Be that every interior machine is to send by sequence of addresses successively the interval t1 time.
Wherein, the setting of time threshold can be selected according to actual conditions, but three threshold values satisfy following relation: default third communication bus free time threshold value is greater than default second communication bus free time threshold value (not shown), and described second communication bus free time threshold value is greater than the first default communication bus free time threshold value.
The communication means flow chart of the multi-gang air-conditioner that Fig. 3 provides for first embodiment of the invention.As shown in Figure 3, the concrete steps of the method comprise:
Step 301: program start, singlechip chip initialization;
Step 302: all the interior machines with unique address identification information that connect on interior machine testing and the record communication bus;
Whether step 303: detecting communication bus free time reaches default third communication bus free time threshold value (t3), in this way, and execution in step 304; As no, continue to wait for;
Step 304: outer machine sends broadcast data frame;
Step 305: interior machine receiving data frames, default the first communication bus free time threshold value (t1) and the second communication bus free time threshold value (t2) that sends responsive data frame;
Step 306: judge whether communication bus free time reach the first default communication bus free time threshold value (t2), if reach, execution in step 307; Otherwise, continue to wait for;
Step 307: judge that all do not send the interior machine address of responsive data frame, the interior machine of address minimum, execution in step 308; Machine in other, execution in step 309;
Step 308: machine sends responsive data frame in this; Execution in step 306;
Step 309: machine is waited for according to default second communication bus free time threshold value (t2) in other, when having detected interior machine transmission Frame, whether again detect communication bus free time reaches the first default communication bus free time threshold value (t1), execution in step 306;
Step 310: judge whether machine transmission Frame finishes in all, and in this way, then execution in step 303, otherwise, execution in step 309.
Fig. 4 is the structured flowchart of multi-gang air-conditioner communication system of the present invention.As shown in Figure 4, described system comprise outer machine with at least two interior machines that are connected by communication bus with described outer machine, described interior machine comprises
The record memory module, all the interior machines with unique address identification information that are used for connecting on interior machine testing and the record communication bus;
Receiver module is used for interior machine and receives broadcast data frame;
The first judge module is used for current all interior machines that do not send responsive data frame and judges whether communication bus free time reach the first default communication bus free time threshold value, as reaches, and is processed by the second judge module;
The second judge module, whether from the interior machine address that in all do not send responsive data frame minimum, in this way, processed by sending module if being used for interior machine judgement; Otherwise, processed by the 3rd judge module;
Sending module is used for sending responsive data frame;
The 3rd judge module is used for judging whether communication bus is idle, such as the free time, processed by the 4th judge module, otherwise, again detect communication bus free time, by described the first judge module processing;
The 4th judge module is used for judging whether communication bus free time reach default second communication bus free time threshold value, as reaches, by described the second judge module processing;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value.
Described outer machine comprises:
Judge module is used for behind machine transmission response data frame end in all, judges whether communication bus free time reach default third communication bus free time threshold value, as reaches, and is processed by sending module;
Sending module is used for sending broadcast data frame.
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value, and described third communication bus free time threshold value is greater than described second communication bus free time threshold value.
When all interior machines that do not send responsive data frame whenever receive once machine in other or outside machine send Frame the time, described the first judge module all rejudges communication bus free time and whether reaches described the first communication bus free time threshold value and second communication bus free time threshold value.
Technical scheme of the present invention, the time that sends Frame by external machine and interior machine manages, after machine sends broadcast data frame outside, interior machine sends responsive data frame successively according to sequence of addresses, change the communication pattern between outer machine and interior machine, constant and guarantee on the basis of communication reliability in existing communication speed (baud rate, usually hardware determine), improve inside and outside machine communication efficiency, shortened call duration time.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD.
Above-mentioned only is preferred embodiment of the present invention and institute's application technology principle, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed in protection scope of the present invention.
Claims (7)
1. the communication means of a multi-gang air-conditioner, described multi-gang air-conditioner comprises outer machine and at least two interior machines that link to each other with described outer machine by communication bus, it is characterized in that, this communication means comprises,
S1: all the interior machines with unique address identification information that connect on interior machine testing and the record communication bus;
S2: interior machine receives broadcast data frame;
S3: current all interior machines that do not send responsive data frame judge whether communication bus free time reach the first default communication bus free time threshold value, as reach execution in step S4;
S4: whether interior machine is judged in the interior machine address that does not send responsive data frame in all minimum, in this way, and execution in step S5, otherwise, execution in step S6;
S5: send responsive data frame;
S6: judge whether communication bus is idle, such as the free time, execution in step S7; Otherwise, again detect communication bus free time, execution in step S3.
S7: judge whether communication bus free time reach default second communication bus free time threshold value, as reach execution in step S4;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value.
2. the communication means of multi-gang air-conditioner according to claim 1, it is characterized in that, broadcast data frame is to be sent according to default third communication bus free time threshold value by outer machine among the described step S2, specifically comprise, after machine in all sends the response data frame end, outer machine judges whether communication bus free time reach default third communication bus free time threshold value, as reaches, and outer machine sends broadcast data frame again;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value, and described third communication free time threshold value is greater than described second communication bus free time threshold value.
3. the communication means of multi-gang air-conditioner according to claim 1, it is characterized in that, current all interior machines that do not send responsive data frame judge whether communication bus free time reach the first default communication bus free time threshold value and comprise among the described step S3, and the Frame that all interior machines that do not send responsive data frame whenever receive once machines in other or the transmission of outer machine all again detects communication bus free time and whether reaches described the first communication bus free time threshold value and second communication bus free time threshold value.
4. the communication means of multi-gang air-conditioner according to claim 1, it is characterized in that, all the interior machines with unique address identification information that connect on machine testing and the record communication bus among the described step S1 comprise, machines send the broadcast data frame that carries the unique address identification information to communication bus in all, interior machine receiving data frames and with the unique address identification information storage of machines in all in self singlechip chip RAM district.
5. the communication system of a multi-gang air-conditioner, described multi-gang air-conditioner comprises outer machine and at least two interior machines that link to each other with described outer machine by communication bus, it is characterized in that described interior machine comprises
The record memory module, all the interior machines with unique address identification information that are used for connecting on interior machine testing and the record communication bus;
Receiver module is used for interior machine and receives broadcast data frame;
The first judge module is used for current all interior machines that do not send responsive data frame and judges whether communication bus free time reach the first default communication bus free time threshold value, as reaches, and is processed by the second judge module;
The second judge module, whether from the interior machine address that in all do not send responsive data frame minimum, in this way, processed by sending module if being used for interior machine judgement; Otherwise, processed by the 3rd judge module;
Sending module is used for sending responsive data frame;
The 3rd judge module is used for judging whether communication bus is idle, such as the free time, processed by the 4th judge module, otherwise, again detect communication bus free time, by described the first judge module processing;
The 4th judge module is used for judging whether communication bus free time reach default second communication bus free time threshold value, as reaches, by described the second judge module processing;
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value.
6. the communication system of multi-gang air-conditioner according to claim 5 is characterized in that, described outer machine comprises:
Judge module is used for behind machine transmission response data frame end in all, judges whether communication bus free time reach default third communication bus free time threshold value, as reaches, and is processed by sending module;
Sending module is used for sending broadcast data frame.
Wherein, described second communication bus free time threshold value is greater than described the first communication bus free time threshold value, and described third communication bus free time threshold value is greater than described second communication bus free time threshold value.
7. the communication system of multi-gang air-conditioner according to claim 5, it is characterized in that, when all interior machines that do not send responsive data frame whenever receive once machine in other or outside machine send Frame the time, described the first judge module all rejudges communication bus free time and whether reaches described the first communication bus free time threshold value and second communication bus free time threshold value.
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| CN108632109B (en) * | 2018-03-09 | 2020-11-10 | 珠海格力电器股份有限公司 | Network communication quality obtaining method, device and system |
| CN108521474B (en) * | 2018-03-30 | 2021-05-25 | 青岛海尔空调电子有限公司 | Address competition method of multi-connected control system |
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| WO2021047339A1 (en) * | 2019-09-10 | 2021-03-18 | 青岛海尔空调电子有限公司 | Air conditioner communication method based on single line half duplex communication and air conditioner |
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