CN106131240A - A kind of CAN address distribution method based on daisy chaining and communication system - Google Patents
A kind of CAN address distribution method based on daisy chaining and communication system Download PDFInfo
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- CN106131240A CN106131240A CN201610646994.3A CN201610646994A CN106131240A CN 106131240 A CN106131240 A CN 106131240A CN 201610646994 A CN201610646994 A CN 201610646994A CN 106131240 A CN106131240 A CN 106131240A
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- 238000004891 communication Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000006855 networking Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
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- 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
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
-
- 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
- H04L2012/40215—Controller Area Network CAN
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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 a kind of CAN address distribution method based on daisy chaining and communication system, belong to CAN communication technical field.Each module to be communicated is cascaded by the way of CAN by the present invention, each module after cascade uses an address wire to be linked in sequence, previous stage module will receive the address information that transmitted by the CAN CAN address as this module according to the auxiliary signal received, CAN address is transmitted by CAN plus setting the numerical value CAN address as rear stage module simultaneously, and sent auxiliary signal to rear stage module by this module by address wire, rear stage module will receive the address information that transmitted by the CAN CAN address as this module according to the auxiliary signal received, thus realize the CAN address distribution of each cascade module based on daisy chaining.The CAN address distribution of the present invention realizes simple, networking flexibility, it is simple to extension, it is possible to be well applied in the CAN communication system of cascade.
Description
Technical field
The present invention relates to a kind of CAN address distribution method based on daisy chaining and communication system, belong to CAN communication technology neck
Territory.
Background technology
It is known that CAN network node must have a legal and unique network address in bus, at CAN net
In network control system, host node is dependent on what the network address realized to each from the identification of node.In actual applications, this
The operation interface that address is supplied to user typically by equipment manufacturer sets, such as toggle switch, knob etc..But
When node needs waterproof and dustproof or is operated in severe, long-range environment, in order to improve the degree of protection of node, node
Inherently can not this interface as reserved category again, now the network address of node just can only be set by software.Nothing
Which kind of mode is opinion use configure CAN node network address, all operant skill and the proposition of the equipment of maintenance to field service personnel
Higher requirement.At present CAN network node realizes the network address by software and automatically distributes and mainly have following two:
A kind of is mode based on module virtual address, it is achieved module individual variation；Each module is when powering on, by certain
Random algorithm produces virtual address, and main frame reduces the scope the most one by one and searches for virtual address, and according to from the response of machine, it is judged that empty
Whether address repeats (needing after repetition to regenerate virtual address), finally determines unique virtual address of each module with this, and main frame passes through
The difference distribution address of this virtual address, inadequate with the reliability of the algorithm of this virtual address and efficiency from the mailing address of machine, and root
The physical location of this module cannot be quickly navigated to according to virtual address.
Another is mode based on physical address, according to certain rule, writes (the power down of unique 32 coding
Memory), realized the individual variation of each module by the difference of this coding, front 29 communications as node of these 32 codings
Address (29 bit identifiers of CAN communication frame).The shortcoming of this mode is: owing to the CAN of standard extends in frame, 29 bit identifiers
In the PS of 8 for the purpose of address, the SA of 8 be source address, other position is used for representing ID page, message code etc., but our
Under formula, due to the uncertainties of 32 codings, cause any array combination of 29 bit identifiers all may by as node address,
The most in this case, the when of front 29 addresses as node, address size may be more than the 8 of PS and SA
Requirement, causes this CAN network to cannot be used for other data and command process, does not possess versatility, compatibility, it is impossible to be incorporated into it
Its CAN network.
Summary of the invention
It is an object of the invention to provide a kind of CAN address distribution method based on daisy chaining and communication system, to solve mesh
The problem that front CAN address distribution is complicated, efficiency is low, do not possess versatility.
The present invention solves that above-mentioned technical problem provides a kind of CAN address distribution method based on daisy chaining, this distribution
Method comprises the following steps:
1) each module to be communicated being cascaded by the way of CAN, each module after cascade passes through address wire order
Connect, i.e. the address output end mouth of previous stage module is connected with the address input end mouth of rear stage module by address wire, is used for
Transport module writes the auxiliary signal of address automatically；
2) previous stage module will receive the address information transmitted by CAN as this mould according to the auxiliary signal received
The CAN address of block, is transmitted CAN address by CAN plus setting the numerical value CAN address as rear stage module simultaneously, and
Sent auxiliary signal by this module by address wire will receive according to the auxiliary signal received to rear stage module, rear stage module
To the address information transmitted by CAN as the CAN address of this module, thus realize each cascade module based on daisy chaining
CAN address is distributed.
Described CAN and address wire make single line bundle, and the interface of this wire harness is CAN Wiring port and address
Holding wire Wiring port integrated.
The address information being in previous stage module is provided by industrial computer and protocol module.
When some module the most successfully obtains its CAN address from upper level module starting when, terminate downwards
Previous module sends CAN address.
When last module successfully obtains its network address, illustrate that all modules before it the most successfully obtain
Its CAN address.
Each inside modules all stores a corresponding type identification code, after the CAN address of each module is allocated successfully, respectively
Its type identification code is sent to industrial computer by the CAN network of cascade by individual module, industrial computer judge address residing for each module
Whether with default module type location matches.
Present invention also offers a kind of CAN communication system, this communication system includes CAN and by CAN level
At least two module of connection, is linked in sequence by address wire between each module, i.e. the address output end mouth of previous stage module passes through
Address wire is connected with the address input end mouth of rear stage module, and this address wire writes the auxiliary letter of address automatically for transport module
Number, its CAN address is sent by CAN by previous stage module plus setting the numerical value CAN address as rear stage module, after
Address in CAN is stored as its address in its addressed memory according to the auxiliary signal received by previous module, with
Realize the CAN address distribution of each cascade module based on daisy chaining.
Described CAN and address signal line make single line bundle, the interface of this wire harness be CAN Wiring port and
Address signal line Wiring port integrated.
Described communication system also includes industrial computer, and this industrial computer is connected with previous stage module, and industrial computer is the most previous
Level module provides CAN address.
Each inside modules all stores a corresponding type identification code, after the CAN address of each module is allocated successfully, respectively
Its type identification code is sent to industrial computer by the CAN network of cascade by individual module, industrial computer judge address residing for each module
Whether with default module type location matches.
The invention has the beneficial effects as follows: each module to be communicated is cascaded, after cascade by the way of CAN by the present invention
Each module use an address wire be linked in sequence, previous stage module will receive by CAN according to the auxiliary signal received
The address information transmitted is as the CAN address of this module, simultaneously using CAN address plus setting numerical value as rear stage module
CAN is transmitted by CAN address, and is sent auxiliary signal to rear stage module, rear stage module by this module by address wire
The address information that transmitted by the CAN CAN address as this module will be received according to the auxiliary signal received, thus realize
The CAN address distribution of each cascade module based on daisy chaining.The CAN address distribution of the present invention realizes simple, networking flexibility,
It is easy to extension, it is possible to be well applied in the CAN communication system of cascade.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the CAN communication system in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.
The CAN address distribution method based on daisy chaining of the present invention is directed to the CAN communication system of cascade, by by each
Module to be communicated cascades by the way of CAN, i.e. the CAN output port of previous stage module and the CAN of rear stage module
Input port connects, and uses an address signal line to connect each module after cascade, i.e. the address output of previous stage module
Port is connected with the address input end mouth of rear stage module by address signal line, automatically writes the auxiliary of address for transport module
Help signal.Previous stage module will receive the address information transmitted by CAN as this module according to the auxiliary signal received
CAN address, CAN address is transmitted by CAN as the CAN address of rear stage module plus setting numerical value simultaneously, and by
This module sends auxiliary signal by address wire and will receive according to the auxiliary signal received to rear stage module, rear stage module
The address information transmitted by CAN is as the CAN address of this module, thus realizes each cascade module based on daisy chaining
CAN address is distributed.
As it is shown in figure 1, communication system targeted in the present embodiment includes industrial computer and 7 modules, 1# module is association
View modular converter, 2# module is digital output module, and 3# module is analog input module, and 4# module is digital input module, 5#
Module is analog output module, and 6# module is digital output module, and 7# module is analog input module, and industrial computer is turned by agreement
Die change block is connected with the CAN IN port of 1# module, and the CAN OUT terminal mouth of 1# module is connected with the CAN IN port of 2# module, 2#
The CAN OUT terminal mouth of module is connected with the CAN IN port of 3# module, the like, it is achieved the CAN cascade between 7 modules,
The address information of each module is transmitted by CAN, in order to realize between each cascade module the automatic distribution between address, each module it
Between be also associated with automatically writing the address wire of address auxiliary signal for transport module, the address output end mouth of previous stage module lead to
Cross address wire to be connected with the address input end mouth of rear stage module, i.e. the address output end mouth of 1# module is by address wire and 2# mould
The address input end mouth of block is connected, and the address output end mouth of 2# module is by the address input end mouth phase of address wire with 3# module
Even, connect in this manner, to realize being linked in sequence of each module's address port.For the convenience of line in the present embodiment, will
CAN and address wire make single line bundle, and the interface of this wire harness is CAN Wiring port and address signal line Wiring port
Integrated, together with the CAN port of corresponding each module also can be designed into address port, suitable with the port of wire harness.This is
The process of system CAN address distribution is as follows:
1., after system powers on first, industrial computer turns CAN protocol module by RS232 and sends first address signal Add:#1 extremely
CAN, simultaneously by address wire transmission auxiliary signal to #1 module, auxiliary signal here can be the frequency of 300Hz
Signal.
2.1# module receives first address Add:#1 after receiving auxiliary signal by address wire from CAN, and stores
As its address in addressed memory, then by this address Add:#1 plus setting numerical value, the present embodiment uses the side adding 1
Formula, is obtained address Add:#1+1, and is sent in CAN by its CAN output port by the address Add:#1+1 obtained, with
Time by address wire send auxiliary signal to #2 module；
3.#2 module receives address Add:#1+1 after receiving auxiliary signal by address wire from CAN, and storage is arrived
As its address in addressed memory, then this address Add:#2 is added 1, and be sent to CAN by its CAN output port
On as #3 module's address, simultaneously #2 module by address wire send auxiliary signal to #3 module；
The most by that analogy, the auxiliary signal that each module in system can send according to previous module is from CAN
Its corresponding CAN address of upper acquisition, this CAN address can store in inside modules, then add 1 on this address and be sent to the next one
Module, only one of which module can receive auxiliary signal each time.By said process, the present invention can quickly realize based on order
The CAN address distribution of chain.
When some module starting when not successfully from a module obtain its network address, it can terminate
Address is sent to next module.If last module successfully obtains its network address, all moulds before it are described
Block the most successfully obtains its network address.RS232 turns CAN protocol module provides the most initial for whole CAN communication system,
The CAN OUT terminal terminating in last module of network system.
Whether the module type position of position with industrial computer internal preset in order to confirm each module mates, and the present invention goes back root
According to the type (numeral input, numeral output, simulation input, simulation output and protocol conversion etc.) of each module in each module
Portion all stores a corresponding types identification code, and after daisy chaining mechanism successfully distributes address, industrial computer reads in network each
The type identification code of module, determines whether the module type position preset with industrial computer internal processes mates, if it does not match,
Display module type error information, adjusts the position of corresponding module in time, the position consistency reaching with presetting.
Each module comprises 8 to 16 input or output interfaces, according to the needs of onsite application environment, it is possible to use or
Do not use some interface therein, or how the function of interface uses, be all to be determined by the application program of module, industrial computer
According to the needs of its internal network systems program, download corresponding application program by CAN modules in system,
Complete its specifying of task.
The communication system of the present invention is based on installing and safeguarding, simple in construction, and wiring is convenient, and networking flexibility is two or more
CAN communication system can be communicated by Ethernet, forms wider array of communication network, and part of module has again independent CAN
With RS232 interface, it is simple to extension.And this communication system is applied widely, portable strong, the feelings being basically unchanged are formed at hardware
Under condition, may migrate on different equipment, only need to as required industrial computer software be made part amendment.Strong interference immunity, safety,
Reliably, system has certain fault-tolerant and error correcting capability, it is possible to as much as possible avoid maloperation, and system response time is fast,
At high speed up to 1Mbps.
Claims (10)
1. a CAN address distribution method based on daisy chaining, it is characterised in that this distribution method comprises the following steps:
1) each module to be communicated being cascaded by the way of CAN, each module after cascade is linked in sequence by address wire,
The i.e. address output end mouth of previous stage module is connected with the address input end mouth of rear stage module by address wire, is used for transmitting mould
Block writes the auxiliary signal of address automatically；
2) previous stage module will receive the address information transmitted by CAN as this module according to the auxiliary signal received
CAN address, is transmitted CAN address by CAN plus setting the numerical value CAN address as rear stage module simultaneously, and by this
Module sends auxiliary signal to rear stage module by address wire, rear stage module according to the auxiliary signal received will receive by
The address information that CAN transmits is as the CAN address of this module, thus realizes the CAN of each cascade module based on daisy chaining
Address is distributed.
CAN address distribution method based on daisy chaining the most according to claim 1, it is characterised in that described CAN
Making single line bundle with address wire, the interface of this wire harness is the integrated of CAN Wiring port and address signal line Wiring port.
CAN address distribution method based on daisy chaining the most according to claim 1 and 2, it is characterised in that be in the most previous
The address information of level module is provided by industrial computer and protocol module.
CAN address distribution method based on daisy chaining the most according to claim 1, it is characterised in that when some module
Starting when, successfully do not obtain its CAN address from upper level module, terminate downward previous module and send CAN address.
CAN address distribution method based on daisy chaining the most according to claim 1, it is characterised in that when last mould
Block successfully obtains its network address, illustrates that all modules before it the most successfully obtain its CAN address.
CAN address distribution method based on daisy chaining the most according to claim 1, it is characterised in that each inside modules is equal
Storage has a corresponding type identification code, and after the CAN address of each module is allocated successfully, modules is by its type identification code
Be sent to industrial computer by the CAN network of cascade, by industrial computer judge address residing for each module whether with default module type
Location matches.
7. a CAN communication system, it is characterised in that this communication system include CAN and by CAN cascade to
Few two modules, are linked in sequence by address wire between each module, i.e. the address output end mouth of previous stage module passes through address wire
Being connected with the address input end mouth of rear stage module, this address wire writes the auxiliary signal of address automatically for transport module, front
Its CAN address is sent by CAN by previous module plus setting the numerical value CAN address as rear stage module, rear stage
Address in CAN is stored as its address in its addressed memory according to the auxiliary signal received by module, to realize
The CAN address distribution of each cascade module based on daisy chaining.
CAN communication system the most according to claim 7, it is characterised in that described CAN and address signal line are made
Single line bundle, the interface of this wire harness is the integrated of CAN Wiring port and address signal line Wiring port.
9. according to the CAN communication system described in claim 7 or 8, it is characterised in that described communication system also includes industry control
Machine, this industrial computer is connected with previous stage module, and industrial computer provides CAN address for previous stage module.
CAN communication system the most according to claim 9, it is characterised in that each inside modules all store one corresponding
Type identification code, after the CAN address of each module is allocated successfully, its type identification code is passed through the CAN net of cascade by modules
Network is sent to industrial computer, by industrial computer judge address residing for each module whether with default module type location matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610646994.3A CN106131240B (en) | 2016-08-09 | 2016-08-09 | CAN address allocation method and communication system based on sequential chain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610646994.3A CN106131240B (en) | 2016-08-09 | 2016-08-09 | CAN address allocation method and communication system based on sequential chain |
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| Publication Number | Publication Date |
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| CN106131240A true CN106131240A (en) | 2016-11-16 |
| CN106131240B CN106131240B (en) | 2024-01-09 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647393A (en) * | 2016-12-13 | 2017-05-10 | 东莞力朗电池科技有限公司 | CAN bus automatic coding circuit and method |
| CN108038061A (en) * | 2017-11-09 | 2018-05-15 | 深圳市亿维自动化技术有限公司 | A kind of address distribution method and PLC system |
| CN111431785A (en) * | 2020-06-11 | 2020-07-17 | 南京北路自动化系统有限责任公司 | CAN bus node ad hoc network method |
| CN112187598A (en) * | 2020-09-03 | 2021-01-05 | 深圳市显控科技股份有限公司 | Networking method, electronic device and storage medium |
| CN112235127A (en) * | 2020-09-22 | 2021-01-15 | 深圳优地科技有限公司 | Node fault reporting method and device, terminal equipment and storage medium |
| CN113382094A (en) * | 2021-05-20 | 2021-09-10 | 西安麦格米特电气有限公司 | Module address determination method and device, power module and communication network |
| CN114422479A (en) * | 2021-12-30 | 2022-04-29 | 深圳市禾望科技有限公司 | CAN bus address setting method |
| CN114500147A (en) * | 2021-12-29 | 2022-05-13 | 深圳市英威腾电气股份有限公司 | Method and device for allocating station numbers, electronic equipment and storage medium |
| CN114531459A (en) * | 2020-11-03 | 2022-05-24 | 深圳市明微电子股份有限公司 | Cascade equipment parameter self-adaptive obtaining method, device, system and storage medium |
| CN114827088A (en) * | 2022-03-24 | 2022-07-29 | 珠海金电电源工业有限公司 | Address assignment system, method, electronic device, storage medium, and program product |
| CN115550311A (en) * | 2022-11-28 | 2022-12-30 | 永联智慧能源科技(常熟)有限公司 | Address self-identification method, device, medium and electronic equipment based on CAN communication |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647393A (en) * | 2016-12-13 | 2017-05-10 | 东莞力朗电池科技有限公司 | CAN bus automatic coding circuit and method |
| CN108038061A (en) * | 2017-11-09 | 2018-05-15 | 深圳市亿维自动化技术有限公司 | A kind of address distribution method and PLC system |
| CN108038061B (en) * | 2017-11-09 | 2020-09-25 | 深圳市亿维自动化技术有限公司 | Address allocation method and PLC system |
| CN111431785A (en) * | 2020-06-11 | 2020-07-17 | 南京北路自动化系统有限责任公司 | CAN bus node ad hoc network method |
| CN112187598A (en) * | 2020-09-03 | 2021-01-05 | 深圳市显控科技股份有限公司 | Networking method, electronic device and storage medium |
| CN112235127A (en) * | 2020-09-22 | 2021-01-15 | 深圳优地科技有限公司 | Node fault reporting method and device, terminal equipment and storage medium |
| CN114531459B (en) * | 2020-11-03 | 2024-05-07 | 深圳市明微电子股份有限公司 | Cascade device parameter self-adaptive acquisition method, device, system and storage medium |
| CN114531459A (en) * | 2020-11-03 | 2022-05-24 | 深圳市明微电子股份有限公司 | Cascade equipment parameter self-adaptive obtaining method, device, system and storage medium |
| CN113382094B (en) * | 2021-05-20 | 2023-09-12 | 西安麦格米特电气有限公司 | Module address determining method and device, power module and communication network |
| CN113382094A (en) * | 2021-05-20 | 2021-09-10 | 西安麦格米特电气有限公司 | Module address determination method and device, power module and communication network |
| CN114500147A (en) * | 2021-12-29 | 2022-05-13 | 深圳市英威腾电气股份有限公司 | Method and device for allocating station numbers, electronic equipment and storage medium |
| CN114500147B (en) * | 2021-12-29 | 2023-12-26 | 深圳市英威腾电气股份有限公司 | Method and device for distributing station numbers, electronic equipment and storage medium |
| CN114422479A (en) * | 2021-12-30 | 2022-04-29 | 深圳市禾望科技有限公司 | CAN bus address setting method |
| CN114827088A (en) * | 2022-03-24 | 2022-07-29 | 珠海金电电源工业有限公司 | Address assignment system, method, electronic device, storage medium, and program product |
| CN115550311A (en) * | 2022-11-28 | 2022-12-30 | 永联智慧能源科技(常熟)有限公司 | Address self-identification method, device, medium and electronic equipment based on CAN communication |
| CN115550311B (en) * | 2022-11-28 | 2023-03-10 | 永联智慧能源科技(常熟)有限公司 | Address self-identification method, device, medium and electronic equipment based on CAN communication |
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| CN106131240B (en) | 2024-01-09 |
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