CN103388870B - Based on central air-conditioner control method and the device of BACnet object ID - Google Patents
Based on central air-conditioner control method and the device of BACnet object ID Download PDFInfo
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Abstract
The present invention relates to a kind of central air-conditioner control method based on BACnet object ID, definition BACnet object ID, communication information transmission is carried out by BACnet gateway between equipment based on BACnet agreement, embody the object ID of BACnet in the communication packet of information transmission, after comparing according to the form of the binary code of each section of described ID and the BACnet object ID of described definition, judge the state of controlled device.Also relate to a kind of central air-conditioning control device using this control method.By the further definition of the instance number part to BACnet object ID, make it the concrete identity information of embodiment device, the communication of BACnet gateway switching multiple devices and control centre can be realized, save gateway cost, simplify engineering wiring.
Description
Technical field
The present invention relates to Intelligent building control system field, particularly relate to the central air-conditioner control method based on BACnet object ID and device.
Background technology
Central air conditioner system, elevator monitoring system, illuminator, transformation and distribution system, fire fighting monitoring, safety monitoring etc. carry out in integrated Intelligent Building System in employing BACnet agreement, and each independent product has the BACnet protocol interface of oneself for accessing this Intelligent Building System in theory.But under normal circumstances, a lot of product does not consider in the design phase problem that building are integrated, once there be this demand, common way increases a BACnet gateway exactly, be equivalent to a router, for carrying out process switching to original product, thus provide BACnet protocol interface, and often have multiple similar and similar product simultaneously by demand that same BACnet gateway is transferred.Such as, the multi-joint unit of central air-conditioning, and a set of unit has multiple indoor set and multiple off-premises station, the equipment of BACnet gateway switching is also often overlap unit more.So just there is the problem of a BACnet object definition, by original way, all BACnet objects in BACnet gateway all belong to same product, do not comprise by the specifying information of control products.Like this, to be transferred multiple equipment by BACnet gateway simultaneously, be difficult to distinguish controlled object and belong to any kind equipment, do not know when making integrated read or amendment be the parameter of what equipment, integrated object cannot be reached.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, provide a kind of reasonable in design and central air-conditioner control method based on BACnet object ID of handling safety, and use the central air-conditioning control device of this control method.
The present invention realizes the technical scheme that above-mentioned purpose adopts: a kind of central air-conditioner control method based on BACnet object ID, for controlling the central air conditioner system setting up communication network based on BACnet agreement, comprises the following steps:
The form of S1, definition BACnet object ID;
The relevant parameter of S2, each equipment added up in described central air conditioner system, and make described BACnet object ID and described relevant parameter one_to_one corresponding;
The control centre of S3, described equipment and described central air conditioner system is transferred by BACnet gateway, and the described BACnet object ID access of the control centre of described central air conditioner system corresponding to each described relevant parameter or each equipment manipulated in described central air conditioner system; Carry out communication information transmission by described BACnet gateway between described equipment simultaneously, in the communication packet of described information transmission, embody the object ID of BACnet.
More preferably, as a kind of embodiment, the form of described BACnet object ID comprises five sections, is respectively object number section, device numbering section, device type section, model series section and object type section.
More preferably, as a kind of embodiment, the object number Duan Wei 5 ~ 0 of described BACnet object ID, described device numbering Duan Wei 16 ~ 6, described device type Duan Wei 18 ~ 17, described model series Duan Wei 21 ~ 19, described object type Duan Wei 31 ~ 22.
More preferably, as a kind of embodiment, described object type section is the data type for representing described relevant parameter;
Described model series section represents the type of the air-conditioner set in described central air conditioner system;
Described device type section represents the type of equipment included in described central air conditioner system;
Described device numbering section represents the numbering of multiple equipment of the same type in described central air conditioner system;
Described object number section represents the difference numbering of the same target type parameter in described central air conditioner system.More preferably, as a kind of embodiment, described object number is used for the described relevant parameter made with described object type section common designation corresponding to described BACnet object ID.
More preferably, as a kind of embodiment, the type of the described air-conditioner set representated by described model series section comprises: multi-connected machine, centrifugal chiller, Screw chiller;
The type of the described equipment representated by described device type section comprises: gateway itself, interior machine, outer machine and expansion equipment.
More preferably, as a kind of embodiment, the quantity of described BACnet gateway is one.
The present invention also provides a kind of central air-conditioning control device using above-mentioned any one control method.
Beneficial effect of the present invention is: the thought that the present invention is directed to BACnet agreement, a corresponding BACnet protocol interface of equipment, in the practical application of multi-variable air conditioning unit, because relating to multiple equipment, by doing further definition to the instance number of BACnet object, make it the identity information of embodiment device, thus realize overlapping multi-variable air conditioning unit by a protocol interface (BACnet gateway) switching more, save gateway cost, simplify engineering wiring.
By this process, generator set controller need not develop BACnet interface again, can the logic control of special disposal unit, and BACnet interface to be transferred process by BACnet gateway, for the occasion not needing BACnet interface, unit also can not can save cost because of standard configuration BACnet interface.
By this process, a set of multiple on-line system, comprises multiple interior machine and outer machine module, can not be splitted into multiple BACnet equipment, remain the organism of a holonomic system.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the central air-conditioner control method based on BACnet object ID of the present invention is further elaborated.
Fig. 1 is the network of one embodiment of the invention;
Wherein:
1 First off-premises station; 2 second off-premises stations; 11 First indoor sets; 12 second indoor sets,
21 the 3rd indoor sets; 22 the 4th indoor sets.
Detailed description of the invention
As shown in Figure 1, the indoor set of the multi-joint unit of central air-conditioning and the communication between outdoor and control centre are transferred by BACnet gateway, off-premises station two is had in network, be respectively off-premises station 1 and off-premises station 2, indoor set has four, be respectively indoor set 11, indoor set 12, indoor set 21 and indoor set 22, wherein the off-premises station of indoor set 11 and indoor set 12 is off-premises station 1; The off-premises station of indoor set 21 and indoor set 22 is off-premises station 2.
Internetwork connection mode is: the communications portion of each indoor set and the communications portion parallel connection access BACnet gateway of corresponding each off-premises station, described gateway access control center, data transmission is carried out by BACnet protocol interface and indoor set and off-premises station, adopt the BACnet of binary number 32, first further definition is done to the instance number of BACnet object, BACnet object ID is divided into five sections in multi-variable air conditioning unit, is respectively object number section, device numbering section, device type section, model series section and object type section.As shown in the table:
Wherein, the binary number of defining objects type section is 10, and the binary number of definition model series section is 3, and the binary number of define equipment type section is 2, and the binary number of define equipment numbering section is 11, and the binary number of defining objects numbering section is 6.
The segmentation definition of BACnet object ID in multi-connected machine is as follows:
Defining objects numbering Duan Wei 5 ~ 0, define equipment numbering Duan Wei 16 ~ 6, define equipment type Duan Wei 18 ~ 17, described model series Duan Wei 21 ~ 19, described object type Duan Wei 31 ~ 22.
The object of each section of representative is as shown in the table:
Described object number section 1 represents the difference numbering of the same target type parameter in central air conditioner system.As AI and 1 represents the first analog quantity jointly, AI and 2 represents the second analog quantity.
Described device numbering section 2 represents the numbering of multiple equipment of the same device type in central air conditioner system.If any multiple indoor set, then device type is all 01, and each indoor set has unique device numbering, is used for representing which indoor set it is.
Described device type section 3 represents gateway itself, indoor set, off-premises station in central air conditioner system, and other expansion equipments.Wherein, gateway itself is defined as 00, and indoor set is defined as 01, and off-premises station is defined as 10.
Described model series section 4 represents the machine set type of central air conditioner system, as multi-joint unit, centrifugal chiller, Screw chiller etc.Wherein, defining multi-joint unit is 0.
Described object type section 5 represents the data type such as analog quantity and switching value in central air conditioner system, as AI(represents analog quantity), BI(represents switching value) etc., consider that this object is generally variable, therefore this object type is defined by agreement itself.Indoor set parameter comprises indoor environment temperature, design temperature, interior machine operational mode, the setting of interior machine operational mode, ON/OFF (state) and ON/OFF (control).
Off-premises station parameter: outdoor environment temperature, compressor two parameters, wherein compressor represents the start-stop of compressor.
The parameter of each indoor set and off-premises station and the BACnet object ID of correspondence thereof, the different parameters of same indoor set or off-premises station is distinguished by 31st ~ 22 object types and 5th ~ 0 object number.The step of BACnet object ID is illustratively defined below for indoor set.
To parameter defining objects ID: according to the feature of parameter, determine 31-22 position object type, 21-19 position is allowed to be 0,18-17 position is 1,16-6 position is interior plane No., and 0-63 can be got in 5-0 position, and different parameters can get same value, if but object type is the same, then this part necessarily can not be the same.
Following table is one definition result wherein, and in the definition of above-mentioned BACnet object ID, except 5-0 position, other parts are all determined.
The information that communication between the equipment based on BACnet agreement is transmitted is all based on BACnet object, the object ID of BACnet generally all can be embodied in communication packet, such as, by read this object ID the 18th, 17, what just can know this BACnet object transfer is the information of indoor set, off-premises station or other equipment, then the 16-6 position of reading object ID just can know it is which indoor set or which off-premises station etc.
When controlling or inquire about the numerical value of certain object, then allow the 18th, 17 for corresponding device type, 16-6 position is the device numbering under this device type.During as inquired about the information of the 100th interior machine, then allow the 18th, 17 for binary number 01, the 16-6 position be binary number 00001100100, i.e. decimal number 100.
Based on the corresponding method of above-mentioned BACnet object and unit equipment, equipment dissimilar in center system can be distinguished, as indoor set, off-premises station or other peripheral hardwares.Each concrete equipment under same device type has unique numbering, indication equipment identity information, even if their parameter information is all the same, as long as they have the numbering mutually distinguished, their object ID is all different.After carrying out exchanges data by BACnet protocol interface and control centre, information, the state of multiple indoor sets, off-premises station and other peripheral hardwares that this BACnet gateway connects can be specified in control centre.So based on this method, a multi-joint unit of the many covers of BACnet gateway switching is feasible.
When the external publish information of BACnet gateway, can object ID be embodied in publish information, from object ID, just can calculate the status information of each controlled device.As from the information announced, to have got object ID be 131137, binary number is 00000000000000100000000001000001, and wherein 21-19 position is 000, represents multi-joint unit; 18-17 position is 01, and representative is indoor set; 16-6 position 00000000001, what represent indoor set is numbered 1; 31-22 position is 0000000000, represents AI, and 5-0 position is 000001 in indoor set, represent indoor environment temperature together with AI above.
If when inquiring about and control the parameter of relevant device, obtain BACnet object ID corresponding to this parameter by definition list above, and carry out accessing operation and just can realize.Access different indoor sets or off-premises station, just can be realized by the value changing 16-6 position; Access indoor set or off-premises station, just can be selected by the value changing 18-17 position.Thus can realize accurately to access and the operation of certain particular device.
Based on a central air-conditioning control device for BACnet object ID, its central air-conditioner control method based on BACnet object ID adopted is identical with embodiment one, repeats no more herein.
By the further definition of the instance number part to BACnet object ID, make it the concrete identity information of embodiment device, the communication of gateway switching multiple devices and control centre can be realized, save gateway cost, simplify engineering wiring.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. based on a central air-conditioner control method for BACnet object ID, for controlling the central air conditioner system setting up communication network based on BACnet agreement; It is characterized in that, comprise the following steps:
The form of S1, definition BACnet object ID; The form of described BACnet object ID comprises five sections, is respectively object number section, device numbering section, device type section, model series section and object type section;
The relevant parameter of S2, each equipment added up in described central air conditioner system, and make described BACnet object ID and described relevant parameter one_to_one corresponding;
The control centre of S3, described equipment and described central air conditioner system is transferred by BACnet gateway, and the described BACnet object ID access of the control centre of described central air conditioner system corresponding to each described relevant parameter or each equipment manipulated in described central air conditioner system; Carry out communication information transmission by described BACnet gateway between described equipment simultaneously, in the communication packet of described information transmission, embody the object ID of BACnet.
2. central air-conditioner control method according to claim 1, is characterized in that:
The object number Duan Wei 5 ~ 0 of described BACnet object ID, described device numbering Duan Wei 16 ~ 6, described device type Duan Wei 18 ~ 17, described model series Duan Wei 21 ~ 19, described object type Duan Wei 31 ~ 22.
3. central air-conditioner control method according to claim 1 and 2, is characterized in that:
Described object type section is the data type for representing described relevant parameter;
Described model series section represents the type of the air-conditioner set in described central air conditioner system;
Described device type section represents the type of equipment included in described central air conditioner system;
Described device numbering section represents the numbering of multiple equipment of the same type in described central air conditioner system; Described object number section represents the difference numbering of the same target type parameter in described central air conditioner system.
4. central air-conditioner control method according to claim 3, is characterized in that:
Described object number is used for the described relevant parameter made with described object type section common designation corresponding to described BACnet object ID.
5. central air-conditioner control method according to claim 3, is characterized in that:
The type of the described air-conditioner set representated by described model series section comprises: multi-connected machine, centrifugal chiller, Screw chiller;
The type of the described equipment representated by described device type section comprises: gateway itself, interior machine, outer machine and expansion equipment.
6. central air-conditioner control method according to claim 1 and 2, is characterized in that: the quantity of described BACnet gateway is one.
7. based on a control device for the central air-conditioning of BACnet object ID, comprise recognition unit, it is characterized in that:
Use the central air-conditioner control method based on BACnet object ID described in any one of claim 1-6.
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| CN104699015A (en) | 2013-12-06 | 2015-06-10 | 珠海格力电器股份有限公司 | Distributed power generation based air-conditioning monitoring system and air conditioning system applying same |
| CN105318488B (en) * | 2014-06-24 | 2019-07-16 | 松下电器产业株式会社 | Pipe type air conditioner and its control method |
| CN104867064A (en) * | 2015-05-18 | 2015-08-26 | 广东美的暖通设备有限公司 | Air conditioner naming method and apparatus |
| CN106790282A (en) * | 2017-02-24 | 2017-05-31 | 珠海格力电器股份有限公司 | A kind of method of protocol conversion, device and air-conditioning system |
| CN106949682B (en) * | 2017-04-12 | 2020-05-12 | 广东芬尼克兹节能设备有限公司 | Control method and device of heat pump system |
| CN109654671B (en) * | 2018-12-29 | 2021-01-08 | 北京合创三众能源科技股份有限公司 | Air conditioning system data transmission method, controller and air conditioning system |
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| US6914893B2 (en) * | 1998-06-22 | 2005-07-05 | Statsignal Ipc, Llc | System and method for monitoring and controlling remote devices |
| JP2004046812A (en) * | 2002-05-21 | 2004-02-12 | Daikin Ind Ltd | Equipment controller, and equipment management system |
| KR20080074374A (en) * | 2007-02-08 | 2008-08-13 | 엘지전자 주식회사 | Building management system |
| CN201081365Y (en) * | 2007-03-30 | 2008-07-02 | 珠海优华节能技术有限公司 | Power-saving operation control system for central air conditioning system in hotel with intelligent information management function |
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