CN106790761A - Host node distribution, the method from node acquisition address, bus address auto-allocation method and device under ModBus buses - Google Patents
Host node distribution, the method from node acquisition address, bus address auto-allocation method and device under ModBus buses Download PDFInfo
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- CN106790761A CN106790761A CN201710007561.8A CN201710007561A CN106790761A CN 106790761 A CN106790761 A CN 106790761A CN 201710007561 A CN201710007561 A CN 201710007561A CN 106790761 A CN106790761 A CN 106790761A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5046—Resolving address allocation conflicts; Testing of addresses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5092—Address allocation by self-assignment, e.g. picking addresses at random and testing if they are already in use
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The present invention relates to ModBus bussing techniques, more particularly to the address automatic allocating method under ModBus buses, to conflict address and free address of this method merges into renewal address table L4, and be broadcast to all from node, judge to whether there is Self address in renewal address table L4 from node to needs, if there is, an address is randomly choosed from address table L4 is updated be updated to Self address from node, due to being to randomly select, conflict address can be all reduced without increasing after each random selection, by limited number of time " detection conflict, free address broadcast update address list L4 randomly update address from node " circulation after, the quantity of conflict address can be reduced zero, now just in the absence of conflict address in system, address is assigned automatically.The method need not respond the broadcast of host node from node, follow strictly ModBus agreements, while can realize that address is distributed automatically.
Description
Technical field
Distributed the present invention relates to host node under ModBus bussing techniques, more particularly to ModBus buses, obtain ground from node
The method of location, bus address auto-allocation method and device.
Background technology
Modbus is the very wide serial bus protocol of an application, and agreement uses principal and subordinate's semiduplex mode, whole under the agreement
Only one of which host node in individual bus, other are all from node.General communication session is by host node as particular address from node
Request is initiated, corresponding to terminate from node response, additionally, host node can also initiate broadcast for leading to from node to all
Know, but broadcast can not be responded from node.This communication pattern avoids collision detection and the Hedging mechanism of complexity, realizes
Low cost.But the agreement for causing some networks conventional is difficult to be realized on Modbus, such as conventional automatic address distribution method
Cannot just be applied in Modbus.Therefore when implementation at the scene, the equipment in Modbus buses needs manual configuration well each
Address of node, it is ensured that the node address on same bus will not conflict.Also, new node is added every time or changes original node
When, it is also desirable to reconfigure address by hand, it is ensured that address does not conflict.It is performed manually by due to address administration, therefore is
The difficulty of the configuration management of system is larger.Use inconvenience.
The content of the invention
In order to overcome the deficiencies in the prior art, divide automatically it is an object of the invention to provide the address based on ModBus buses
Method of completing the square, and the method that host node distributes the method for address and obtains address automatically from node automatically during using the method, its
Can solve the problems, such as that existing ModBus buses cannot automatically distribute address.
The purpose of the present invention is realized using following technical scheme：
Based on the address automatic allocating method of ModBus buses, host node search free address in ModBus bus systems,
Whether address and conflict address are taken, list of free addresses L1 and conflict address list L3 is set up, conflict address list L3 is judged
It is sky, if it is not, then performing following address issuing steps and address renewal step, and updates list of free addresses L1 and conflict
Address list L3, until wherein conflict address list L3 is sky, wherein free address refers to the address not taken by any node,
It refers to the address that only one node takes to take address, and conflict address refers to the address that at least two nodes take；
Address issuing steps：Host node extracts the ground of the address and conflict address list L3 clocks in list of free addresses L1
Location, forms and updates address list L4, to all from node broadcasts renewal address list L4；
Address updates step：When receiving renewal address list L4 from node, judge the address of its own whether to renewal
In address list L4, if it is, obtaining an address at random from address list L4 is updated, the address is updated to itself ground
Location.
Wherein, including conflict screening step：Host node sends to the unknown address of state and reads instruction, after sending every time etc.
Specified waiting period T1 is treated, in specified waiting period T1, if not receiving any response, judges the address not idly
Location, if this receives the response or the normal response of more than two of mistake, it is conflict address to record the address.
The method that host node based on ModBus buses distributes address automatically is also provided, ModBus bus systems is searched hollow
Public land location, occupancy address and conflict address, set up list of free addresses L1 and conflict address list L3, judge the address list that conflicts
Whether L3 is empty, if it is not, then performing following address issuing steps, and updates list of free addresses L1 and conflict address list
L3, until wherein conflict address list L3 is sky, wherein free address refers to the address not taken by any node, takes address
Refer to only one address of node occupancy, conflict address refers to the addresses that at least two nodes take；
Address issuing steps：The address of the address and conflict address list L3 clocks in list of free addresses L1 is extracted, is formed
Address list L4 is updated, renewal address list L4 is broadcasted to total system.
The method for obtaining address automatically from node based on ModBus buses is also provided, renewal address list L4 is collected
When, whether the address of itself is judged in renewal address list L4, if it is, being obtained at random from address list L4 is updated
One address, Self address is updated to by the address.
Compared to existing technology, the beneficial effects of the present invention are：To conflict address and free address of this method is merged into more
New address table L4, and it is broadcast to all from node, whether there is Self address in address table L4 from node to needing to judge to update,
If there is, it is meant that should from the original address of node and other from node conflict, from node from address table L4 is updated with
Machine select an address be updated to Self address, due to being to randomly select, after each random selection conflict address can all reduce and
Will not increase (because original address be not conflict address will not change address from node, conflict it is impossible from number of nodes
Increase, the address of conflict is naturally also impossible to increase), therefore in theory, by limited number of time " detection conflict, free address-wide
Broadcast update address list L4- randomly update address from node " circulation after, conflict address quantity can be reduced zero, now
Just in the absence of conflict address in system, address is assigned automatically.The method need not respond the broadcast of host node from node, sternly
Lattice follow ModBus agreements, while can realize that address is distributed automatically.
Specific embodiment
Below, with reference to specific embodiment, the present invention is described further：
The address automatic allocating method that the present invention is provided is applied under ModBus agreements, and under such an arrangement, bus includes
Host node and from node, host node can as specify address initiated from node access, and obtain the response from node, it is also possible to
Do not require it is any from node respond in the case of to all from node broadcasts, for convenience of description, present embodiment assumes that from section
Point reserves 16 default registers in agreement register number (A).
The method is comprised the following steps：
Step A：The address unknown to state in system carries out condition adjudgement, is free address, is accounted for clear and definite these addresses
Still conflicted address with address, free address refers to the address not taken by any node, it refers to only one section to take address
The address that point takes, conflict address refers to the address that at least two nodes take.At the beginning, shape of the host node to all addresses
State is all indefinite, therefore all addresses (1-247) is judged respectively, and the method for judgement is host node unknown to state
Address send read reserve 16 instructions of default register, every time send after wait specified waiting period T1, specified etc.
Treat in period T1, if not receiving any response, judge that the address is free address, if received only in stand-by period T1
One correct response, then judge the vacant address in the address, if this receives the response or the normal response of more than two of mistake,
It is conflict address then to record the address, collects all free address, sets up list of free addresses L1, collects all occupancy addresses,
Set up and take address list L2, collect all conflict addresses, set up conflict address list L3.
Step B：S (S are selected from the address list that conflicts<16) individual address, then selects in list of free addresses L1
16-S address, forms and updates address list L4.To all from node broadcasts renewal address list L4.In the present embodiment, by
Limited in the space of register, therefore 16 addresses can only occur every time, in practical application, can shown mercy according to the pre- of register
Condition is adjusted.Furthermore it is preferred that, updating the quantity of conflict address in address list L4 will be less than the quantity of free address, so,
There can be probability higher quickly to reduce conflict address.
Step C：From node receive renewal address list L4 when, judge the address of its own whether to update address list
In L4, if it is, obtaining an address at random from address list L4 is updated, the address is updated to Self address.
Step D：After delay duration T2, all addresses to updating address list L4 carry out condition adjudgement, with it is clear and definite these
Address is free address, takes address or conflict address, and determination methods refer to step A, after specifying the state of these addresses, root
List of free addresses L1 is updated according to the state change of these addresses, address list L2 is taken and conflict address list L3, judged
Whether conflict address list L3 is empty, if it is not, then step B-D is repeated, until conflict address list L3 is sky.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (8)
1. the address automatic allocating method of ModBus buses is based on, it is characterised in that：Host node is searched in ModBus bus systems
Free address, occupancy address and conflict address, set up list of free addresses L1 and conflict address list L3, judge the address column that conflicts
Whether table L3 is empty, if it is not, then performing following address issuing steps and address renewal step, and updates list of free addresses
L1 and conflict address list L3, until wherein conflict address list L3 is sky, wherein free address refers to not accounted for by any node
Address, it refers to the address that only one node takes to take address, and conflict address refers to what at least two nodes took
Address；
Address issuing steps：Host node extracts the address in address and conflict address list L3 in list of free addresses L1, shape
Into address list L4 is updated, to all from node broadcasts renewal address list L4；
Address updates step：From node receive renewal address list L4 when, judge the address of its own whether to update address
In list L4, if it is, obtaining an address at random from address list L4 is updated, the address is updated to Self address.
2. a kind of address automatic allocating method based on ModBus buses as claimed in claim 1, it is characterised in that included
Conflict screening step：Host node is sent to the unknown address of state and reads instruction, and specified waiting period T1 is waited after sending every time,
In specified waiting period T1, if not receiving any response, judge that the address is free address, if receiving returning for mistake
Should or the normal response of more than two, then it is the address that conflicts to record the address.
3. the method that the host node based on ModBus buses distributes address automatically, it is characterised in that：Search ModBus bus systems
Middle free address, occupancy address and conflict address, set up list of free addresses L1 and conflict address list L3, judge the address that conflicts
Whether list L3 is empty, if it is not, then performing following address issuing steps, and updates list of free addresses L1 and conflict address
List L3, until wherein conflict address list L3 is sky, wherein free address refers to the address not taken by any node, is taken
Address refers to the address that only one node takes, and conflict address refers to the address that at least two nodes take；
Address issuing steps：The address of the address and conflict address list L3 clocks in list of free addresses L1 is extracted, is formed and updated
Address list L4, renewal address list L4 is broadcasted to total system.
4. the method for obtaining address automatically from node of ModBus buses is based on, it is characterised in that：Collect renewal address list
During L4, whether the address of itself is judged in renewal address list L4, if it is, being obtained at random from address list L4 is updated
An address is taken, the address is updated to Self address.
5. the address automatic allocation device of ModBus buses is based on, it is characterised in that：Host node is searched in ModBus bus systems
Free address, occupancy address and conflict address, set up list of free addresses L1 and conflict address list L3, judge the address column that conflicts
Whether table L3 is empty, if it is not, then starting following address distributing devices and address updating device, and updates list of free addresses
L1 and conflict address list L3, until wherein conflict address list L3 is sky, wherein free address refers to not accounted for by any node
Address, it refers to the address that only one node takes to take address, and conflict address refers to what at least two nodes took
Address；
Address distributing device：Host node extracts the address of the address and conflict address list L3 clocks in list of free addresses L1, shape
Into address list L4 is updated, to all from node broadcasts renewal address list L4；
Address updating device：From node receive renewal address list L4 when, judge the address of its own whether to update address
In list L4, if it is, obtaining an address at random from address list L4 is updated, the address is updated to Self address.
6. a kind of address automatic allocation device based on ModBus buses as claimed in claim 5, it is characterised in that including punching
Prominent screening plant：Host node is sent to the unknown address of state and reads instruction, and specified waiting period T1 is waited after sending every time,
In specified waiting period T1, if not receiving any response, the non-free address in the address is judged, if this receives returning for mistake
Should or the normal response of more than two, then it is the address that conflicts to record the address.
7. the method that the host node based on ModBus buses distributes address automatically, it is characterised in that：Search ModBus bus systems
Middle free address, occupancy address and conflict address, set up list of free addresses L1 and conflict address list L3, judge the address that conflicts
Whether list L3 is empty, if it is not, then performing following address distributing devices, and updates list of free addresses L1 and conflict address
List L3, until wherein conflict address list L3 is sky, wherein free address refers to the address not taken by any node, is taken
Address refers to the address that only one node takes, and conflict address refers to the address that at least two nodes take；
Address distributing device：The address of the address and conflict address list L3 clocks in list of free addresses L1 is extracted, is formed and updated
Address list L4, renewal address list L4 is broadcasted to total system.
8. the device for obtaining address automatically from node of ModBus buses is based on, it is characterised in that：Collect renewal address list
During L4, whether the address of itself is judged in renewal address list L4, if it is, being obtained at random from address list L4 is updated
An address is taken, the address is updated to Self address.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107205063A (en) * | 2017-07-28 | 2017-09-26 | 杭州聪普智能科技有限公司 | A kind of device conflict solution of Intelligent housing bus |
| CN107368432A (en) * | 2017-07-14 | 2017-11-21 | 上海冉能自动化科技有限公司 | logical address allocation method |
| CN108881505A (en) * | 2018-05-30 | 2018-11-23 | 武汉高仕达电气有限公司 | A kind of CAN bus node address distribution method and system |
| CN109218155A (en) * | 2018-09-13 | 2019-01-15 | 深圳益邦物联科技有限公司 | Address automatic distribution system and method based on Modbus rtu protocol |
| CN110474993A (en) * | 2018-05-09 | 2019-11-19 | 杭州海康机器人技术有限公司 | Node addressing system, method and device |
| CN110633242A (en) * | 2019-08-10 | 2019-12-31 | 中山华帝电子科技有限公司 | Control circuit of serial port communication circuit |
| CN110830349A (en) * | 2019-11-15 | 2020-02-21 | 宁波兴为汽车电子有限公司 | Universal address allocation method for vehicle LIN switch slave control module |
| CN111083026A (en) * | 2018-10-18 | 2020-04-28 | 本德尔有限两合公司 | Method for performing host-slave communication by using Modbus RTU standard protocol |
| CN111629080A (en) * | 2020-05-22 | 2020-09-04 | 浙江东鸿电子科技有限公司 | Method for automatically allocating electric meter address |
| CN113242170A (en) * | 2021-05-21 | 2021-08-10 | 深圳易马达科技有限公司 | Address allocation method and device |
| CN113779320A (en) * | 2021-08-18 | 2021-12-10 | 北京计算机技术及应用研究所 | Method for solving table entry storage address conflict |
| CN117544598A (en) * | 2024-01-03 | 2024-02-09 | 成都电科星拓科技有限公司 | I2C bus address automatic allocation method |
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| CN107368432A (en) * | 2017-07-14 | 2017-11-21 | 上海冉能自动化科技有限公司 | logical address allocation method |
| CN107205063A (en) * | 2017-07-28 | 2017-09-26 | 杭州聪普智能科技有限公司 | A kind of device conflict solution of Intelligent housing bus |
| CN110474993B (en) * | 2018-05-09 | 2022-08-02 | 杭州海康机器人技术有限公司 | Node addressing system, method and device |
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| CN108881505A (en) * | 2018-05-30 | 2018-11-23 | 武汉高仕达电气有限公司 | A kind of CAN bus node address distribution method and system |
| CN109218155A (en) * | 2018-09-13 | 2019-01-15 | 深圳益邦物联科技有限公司 | Address automatic distribution system and method based on Modbus rtu protocol |
| CN111083026A (en) * | 2018-10-18 | 2020-04-28 | 本德尔有限两合公司 | Method for performing host-slave communication by using Modbus RTU standard protocol |
| CN110633242A (en) * | 2019-08-10 | 2019-12-31 | 中山华帝电子科技有限公司 | Control circuit of serial port communication circuit |
| CN110830349A (en) * | 2019-11-15 | 2020-02-21 | 宁波兴为汽车电子有限公司 | Universal address allocation method for vehicle LIN switch slave control module |
| CN110830349B (en) * | 2019-11-15 | 2021-05-28 | 宁波兴为汽车电子有限公司 | Universal address allocation method for vehicle LIN switch slave control module |
| CN111629080A (en) * | 2020-05-22 | 2020-09-04 | 浙江东鸿电子科技有限公司 | Method for automatically allocating electric meter address |
| CN113242170A (en) * | 2021-05-21 | 2021-08-10 | 深圳易马达科技有限公司 | Address allocation method and device |
| CN113242170B (en) * | 2021-05-21 | 2023-03-21 | 深圳易马达科技有限公司 | Address allocation method and device |
| CN113779320A (en) * | 2021-08-18 | 2021-12-10 | 北京计算机技术及应用研究所 | Method for solving table entry storage address conflict |
| CN113779320B (en) * | 2021-08-18 | 2024-02-27 | 北京计算机技术及应用研究所 | Method for solving table entry storage address conflict |
| CN117544598A (en) * | 2024-01-03 | 2024-02-09 | 成都电科星拓科技有限公司 | I2C bus address automatic allocation method |
| CN117544598B (en) * | 2024-01-03 | 2024-03-29 | 成都电科星拓科技有限公司 | I2C bus address automatic allocation method |
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Application publication date: 20170531 |