CN104065763A - Free-number air conditioner automatic random addressing communication method based on RS485 - Google Patents
Free-number air conditioner automatic random addressing communication method based on RS485 Download PDFInfo
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Abstract
The invention discloses a free-number air conditioner automatic random addressing communication method based on RS485. The method comprises a step (1) of addressing, a step (2) of searching, a step (3) of determining an address, and a step (4) of quitting the addressing process and entering into a normal communication mode. According to the free-number air conditioner automatic random addressing communication method based on RS485, an automatic addressing mode is used, an artificial addressing problem is solved, intermediate steps are removed, and manpower and cost are saved.
Description
Technical field
The present invention relates to independent assortment variable-frequency multi-connection type air-conditioner control system, specifically a kind of automated randomized addressing communication means of free quantity air-conditioning based on RS485.
Background technology
Variable-frequency multi-connection type air-conditioning system is most of in the market adopts manual addressing mode, needs manually to adjust the object that reaches addressing in the time selling or install, install so cumbersome, inefficiency, cost of labor is high.
Summary of the invention
In order to solve the above-mentioned technical problem existing in prior art, the invention provides a kind of automated randomized addressing communication means of free quantity air-conditioning based on RS485, specifically comprise the steps:
Step 1: addressing
Indoor and outdoor machine powers on simultaneously.Outer machine timing N second, sends addressing order (broadcasting command), and interior machine receives broadcasting command, reads current gained random number, and through data processing, record is as current address;
Step 2: search
Poll 2-N(N is the number of indoor set, can change according to product) address, the interior machine receiving is replied normal data, outer machine, by checking verification, has determined whether the repetition of interior machine address, receives after the interior machine data of repeat to address (RA), send to corresponding interior machine and reset location order, in order, need to provide already present address, and then confirm poll, wait until always all indoor set communications of inquiry all unique and normal till;
Step 3: determine
Determine location, N tableland, send and determine addressing order, then send sequence order, again give interior machine sequence, all indoor set sequences of training in rotation, sort to all indoor sets, after sequence, the code of all indoor sets of sequence are sent to memory device;
Step 4: exit addressing process, enter normal communication mode.
Further, the concrete steps of step 1 addressing are:
First, indoor and outdoor machine control board powers on simultaneously, and off-premises station postpones N second, starts to send addressing broadcasting command, and within N second, indoor set is by with minimum time unit count, and repeatedly the mode of accumulated error is overflowed in circulation, makes the abundant randomization of count value.In the time that indoor set receives the addressing order of off-premises station, the count value that intercepts current indoor set is address generate value, by calculating with total number of units of indoor set, obtains the numerical value of a 2-255 as current address.
Further, the concrete steps that step 2 is searched are:
1. off-premises station sends and starts to search action command;
2. off-premises station sends data query bag (for example per second) in the mode of fixed cycle, sends successively data query bag taking 2-255 as destination address;
3. when indoor set receives data query bag, within off-premises station polling cycle, reply data;
4. if the data that off-premises station receives are correct, current address is sent 3 times, three times are all errorless, note down current address of indoor unit, enter next address inquiry;
5. if there is mistake in off-premises station reception data, send 3 times, receive and all occur mistake, illustrate that bus has competition, off-premises station sends to the order of current indoor set deallocation, and appointment is deallocation scope from current address for starting to 255;
If 6. off-premises station does not receive reply, retransmit once confirmation still without replying, the cycle meets rear inquiry next address;
7. inquire about after 255 ends of address (EOA) when off-premises station, off-premises station can be inquired about once 2-255 address again again again, and confirming has competition mistake or under-enumeration without any indoor set.
8. off-premises station sends broadcasting command, confirms to search release.
Further, in step 3, definite concrete steps are:
1. off-premises station passes through order to all indoor sets of record before according to the size of the numerical value of address, carries out address and resets, and by all address of indoor unit location continuation address, 2-N(N is less than 255);
2. when having sorted, engineering staff can pass through upper computer software, and the sequence of machine is adjusted, adjustment finishes the current address of indoor unit of rear record and deposits memory device in, when off-premises station does not detect upper computer software, be address by default sort record, and deposit memory device in.
The automated randomized addressing communication means of free quantity air-conditioning based on RS485 of the present invention adopts auto-addressing mode, has solved artificial addressing problem, removes intermediate steps, saves manpower and cost.
Brief description of the drawings
Fig. 1 and 2 is the control flow chart of the automated randomized addressing communication means of free quantity air-conditioning based on RS485 of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The problem that the automated randomized addressing of free quantity air-conditioning will solve is as follows: the problem that random number produces; The problem that random address repeats; The problem of address rearrangement; The problem of 485 bus contentions.
1. the problem that random number produces: what the present invention adopted is that hardware adds software in conjunction with the method that produces random number.Concrete thought is: for circuit control panel, the execution of MCU program is that the time meets MCU operation beginning from power on, thereby the frequency with crystal oscillator concussion configures and carries out instruction through software, and because the each original paper of control board hardware all has error, crystal oscillator itself also exists error.The control board simultaneously powering on, the time that actual MCU sign on is carried out is not identical, and execution speed is also variant.So add counting by software, overflow the method for zero clearing, after carrying out by repeatedly circulating, the control board simultaneously powering on count value is now a random number.The probability that count value is identical is very low.
2. the problem that random address repeats: in the time that repeat the random address of acquisition, can software control control board deallocation.
3. address rearrangement problem: all unique definite later when all address of indoor unit, because random before address may be interrupted, may be also continuous, so need to resequence to the address producing.
The problem of 4.485 bus contentions: in the time that more than two terminal is opened transmitted signal simultaneously, can cause the competition of bus signals, when real process, the data that can cause receiving terminal to be received are made mistakes, make mistakes by decision data repeatedly, can confirm whether bus has competition, compete and can know have address of indoor unit to repeat by judgement.
As shown in Figure 1, the automated randomized addressing communication means of free quantity air-conditioning based on RS485 of the present invention, the concrete flow process of carrying out:
Step 1: addressing
Indoor and outdoor machine powers on simultaneously.Outer machine timing N second, sends addressing order (broadcasting command), and interior machine receives broadcasting command, reads current gained random number, and through data processing, record is as current address.
Step 2: search
Poll 2-N(N is the number of indoor set, can change according to product) address, the interior machine receiving is replied normal data, outer machine is by checking verification, determine whether the repetition of interior machine address, received after the interior machine data of repeat to address (RA), sent to corresponding interior machine and reset location order, in order, need to provide already present address, and then confirm poll.Wait until always all indoor set communications of inquiry all unique and normal till.
Step 3: determine
Determine location, N tableland, send and determine addressing order, then send sequence order, again give interior machine sequence, all indoor set sequences of training in rotation, sort to all indoor sets, after sequence, the code of all indoor sets of sequence are sent to memory device.
Step 4: exit addressing process, enter normal communication mode.
The concrete steps of step 1 addressing are:
First, indoor and outdoor machine control board powers on simultaneously, and off-premises station postpones N second, starts to send addressing broadcasting command, and within N second, indoor set is by with minimum time unit count, and repeatedly the mode of accumulated error is overflowed in circulation, makes the abundant randomization of count value.In the time that indoor set receives the addressing order of off-premises station, the count value that intercepts current indoor set is address generate value, by calculating with total number of units of indoor set, obtains the numerical value of a 2-255 as current address.
The concrete steps that step 2 is searched are:
1. off-premises station sends and starts to search action command;
2. off-premises station sends data query bag (for example per second) in the mode of fixed cycle, sends successively data query bag taking 2-255 as destination address;
3. when indoor set receives data query bag, within off-premises station polling cycle, reply data;
4. if the data that off-premises station receives are correct, current address is sent 3 times, three times are all errorless, note down current address of indoor unit, enter next address inquiry;
5. if there is mistake in off-premises station reception data, send 3 times, receive and all occur mistake, illustrate that bus has competition, off-premises station sends to the order of current indoor set deallocation, and appointment is deallocation scope from current address for starting to 255;
If 6. off-premises station does not receive reply, retransmit once confirmation still without replying, the cycle meets rear inquiry next address;
7. inquire about after 255 ends of address (EOA) when off-premises station, off-premises station can be inquired about once 2-255 address again again again, and confirming has competition mistake or under-enumeration without any indoor set.
8. off-premises station sends broadcasting command, confirms to search release.
Concrete steps definite in step 3 are:
1. off-premises station passes through order to all indoor sets of record before according to the size of the numerical value of address, carries out address and resets, and by all address of indoor unit location continuation address, 2-N(N is less than 255);
2. when having sorted, engineering staff can pass through upper computer software, and the sequence of machine is adjusted, adjustment finishes the current address of indoor unit of rear record and deposits memory device in, when off-premises station does not detect upper computer software, be address by default sort record, and deposit memory device in.
Claims (4)
1. the automated randomized addressing communication means of free quantity air-conditioning based on RS485, specifically comprises the steps:
Step 1: addressing
Indoor and outdoor machine powers on simultaneously;
Outer machine timing N second, sends addressing order (broadcasting command), and interior machine receives broadcasting command, reads current gained random number, and through data processing, record is as current address;
Step 2: search
Poll 2-N(N is the number of indoor set, can change according to product) address, the interior machine receiving is replied normal data, outer machine, by checking verification, has determined whether the repetition of interior machine address, receives after the interior machine data of repeat to address (RA), send to corresponding interior machine and reset location order, in order, need to provide already present address, and then confirm poll, wait until always all indoor set communications of inquiry all unique and normal till;
Step 3: determine
Determine location, N tableland, send and determine addressing order, then send sequence order, again give interior machine sequence, all indoor set sequences of training in rotation, sort to all indoor sets, after sequence, the code of all indoor sets of sequence are sent to memory device;
Step 4: exit addressing process, enter normal communication mode.
2. the automated randomized addressing communication means of free quantity air-conditioning based on RS485 as claimed in claim 1, is characterized in that: the concrete steps of step 1 addressing are:
First, indoor and outdoor machine control board powers on simultaneously, and off-premises station postpones N second, starts to send addressing broadcasting command, and within N second, indoor set is by with minimum time unit count, and repeatedly the mode of accumulated error is overflowed in circulation, makes the abundant randomization of count value;
In the time that indoor set receives the addressing order of off-premises station, the count value that intercepts current indoor set is address generate value, by calculating with total number of units of indoor set, obtains the numerical value of a 2-255 as current address.
3. the automated randomized addressing communication means of free quantity air-conditioning based on RS485 as claimed in claim 1, is characterized in that: the concrete steps that step 2 is searched are:
1. off-premises station sends and starts to search action command;
2. off-premises station sends data query bag (for example per second) in the mode of fixed cycle, sends successively data query bag taking 2-255 as destination address;
3. when indoor set receives data query bag, within off-premises station polling cycle, reply data;
4. if the data that off-premises station receives are correct, current address is sent 3 times, three times are all errorless, note down current address of indoor unit, enter next address inquiry;
5. if there is mistake in off-premises station reception data, send 3 times, receive and all occur mistake, illustrate that bus has competition, off-premises station sends to the order of current indoor set deallocation, and appointment is deallocation scope from current address for starting to 255;
If 6. off-premises station does not receive reply, retransmit once confirmation still without replying, the cycle meets rear inquiry next address;
7. inquire about after 255 ends of address (EOA) when off-premises station, off-premises station can be inquired about once 2-255 address again again again, and confirming has competition mistake or under-enumeration without any indoor set;
8. off-premises station sends broadcasting command, confirms to search release.
4. the automated randomized addressing communication means of free quantity air-conditioning based on RS485 as claimed in claim 1, is characterized in that: concrete steps definite in step 3 are:
1. off-premises station passes through order to all indoor sets of record before according to the size of the numerical value of address, carries out address and resets, and by all address of indoor unit location continuation address, 2-N(N is less than 255);
2. when having sorted, engineering staff can pass through upper computer software, and the sequence of machine is adjusted, adjustment finishes the current address of indoor unit of rear record and deposits memory device in, when off-premises station does not detect upper computer software, be address by default sort record, and deposit memory device in.
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| CN104965473A (en) * | 2015-07-22 | 2015-10-07 | 广东美的暖通设备有限公司 | VRV air-conditioning system and automatic addressing method therefor based on CAN bus |
| CN105181103A (en) * | 2015-08-21 | 2015-12-23 | 重庆大唐科技股份有限公司 | Automatic addressing method for digital weighing sensor |
| CN105391814A (en) * | 2015-10-19 | 2016-03-09 | 珠海格力电器股份有限公司 | Address allocation method and device for main and auxiliary line controllers |
| CN105546730A (en) * | 2015-12-23 | 2016-05-04 | 宁波奥克斯电气股份有限公司 | Automatic addressing method of multi-connected air conditioner indoor unit |
| CN107166562A (en) * | 2017-04-21 | 2017-09-15 | 珠海格力电器股份有限公司 | Multi-connected air conditioner and debugging method and device thereof |
| CN111654557A (en) * | 2020-05-29 | 2020-09-11 | 宋斌 | Automatic distribution method of RS485 address codes, upper computer and lower computer |
| CN111964228A (en) * | 2020-07-27 | 2020-11-20 | 新科环保科技有限公司 | Automatic addressing method for multi-connected air conditioner indoor unit |
| CN112084126A (en) * | 2020-09-08 | 2020-12-15 | 南京华天科技发展股份有限公司 | RS485 automatic address generation method |
| CN112235435A (en) * | 2020-10-21 | 2021-01-15 | 递易（上海）智能科技有限公司 | Method and equipment for fast coding |
| CN112887439A (en) * | 2019-11-29 | 2021-06-01 | 株洲中车时代电气股份有限公司 | CAN address configuration method and system for air conditioning unit frequency converter |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104965473B (en) * | 2015-07-22 | 2018-01-02 | 广东美的暖通设备有限公司 | Multiple on-line system and the multiple on-line system automatic addressing method based on CAN |
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| CN112887439A (en) * | 2019-11-29 | 2021-06-01 | 株洲中车时代电气股份有限公司 | CAN address configuration method and system for air conditioning unit frequency converter |
| CN111654557A (en) * | 2020-05-29 | 2020-09-11 | 宋斌 | Automatic distribution method of RS485 address codes, upper computer and lower computer |
| CN111654557B (en) * | 2020-05-29 | 2024-07-02 | 安徽天光传感器有限公司 | Automatic distribution method for RS485 address code, upper computer and lower computer |
| CN111964228A (en) * | 2020-07-27 | 2020-11-20 | 新科环保科技有限公司 | Automatic addressing method for multi-connected air conditioner indoor unit |
| CN112084126A (en) * | 2020-09-08 | 2020-12-15 | 南京华天科技发展股份有限公司 | RS485 automatic address generation method |
| CN112235435A (en) * | 2020-10-21 | 2021-01-15 | 递易（上海）智能科技有限公司 | Method and equipment for fast coding |
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