CN105450489B - The preferential efficient field bus systems of HEBus and communication means for realizing most short message of output - Google Patents
The preferential efficient field bus systems of HEBus and communication means for realizing most short message of output Download PDFInfo
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- CN105450489B CN105450489B CN201510870532.5A CN201510870532A CN105450489B CN 105450489 B CN105450489 B CN 105450489B CN 201510870532 A CN201510870532 A CN 201510870532A CN 105450489 B CN105450489 B CN 105450489B
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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
- H04L12/40143—Bus networks involving priority mechanisms
- H04L12/4015—Bus networks involving priority mechanisms by scheduling the transmission of messages at the communication node
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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]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
Abstract
The present invention relates to technical field of industrial control, a kind of output is preferential to realize that the efficient field bus systems of HEBus of most short message and communication means, the communication means include the following steps：Step 1, Initialize installation, after system electrification, main website carries out Initialize installation to each slave station, if unsuccessful progress step 2 troubleshooting of initialization, the communication of step 3 looped network is successfully carried out if initializing, only needs a frame transmission that can complete the data exchange of main website and each slave station in communication process, if breaking down, then switch communication mode and carry out step 4 point-to-point communication, be used for subring Network Communication, looped network communication can be automatically restored in communication process；When encountering unrecoverable failure in communication process, carries out step 5 and terminate communication.The communication process of the present invention realizes the transmission of most short message recursion using output is preferential, data field uses dynamic allocation mode, main website is arranged as slave station re-mapping according to the descending of net output valve, provide optimal data transfer path, the time waste for reducing transmission process, is greatly improved data transmission efficiency.
Description
Technical field
The preferential efficient field bus systems of HEBus and communication means for realizing most short message is exported the present invention relates to a kind of,
Belong to technical field of industrial control.
Background technology
In technical field of industrial control, single control unit is difficult to meet the need of multiple spot distributed collaboration control system
It asks, for multiple spot distributed collaboration control system, needs that by largely communicating multipoint acquisition association could be carried out between each website
With control, with the continuous development of network technology and field bus technique, existing multiple technologies can realize that multiple spot distribution is assisted
With control.
At present in technical field of industrial control using wide communication protocol have Modbus, Profibus, MPI, TCP,
UDP, EtherCAT etc., based on the communication system of above agreement composition, majority is connected using bus mode, is carried out point-to-point logical
Letter, Protocol Design is simple, easy-to-connect, but can only realize the communication one by one between main website and slave station, can not be straight between each slave station
Letter is connected, data synchronizing speed is greatly limited, can cause the synchronizing relay of system longer, main when the slave station in bus is excessive
Standing, frequent communication work burden is larger, and logic control is less efficient.
In communication system based on above agreement composition, some also uses interchanger to carry out network connection, with serial communication
System have increased significantly compared to its traffic rate, but its Protocol Design is complicated, and cost is higher, and each website still uses
Point-to-point communication mode needs complicated treatment mechanism to complete the Collaborative Control between website；Some also uses looped network mode
Connection, looped network connection effectively solve the deficiency of point-to-point communication, alleviate the work load of main website, but most looped network communications
Data frame be that each website is assigned with specified mapping length, each website only needs to obtain a small amount of data information but in system
The data frame for receiving, processing and transmit equal length is devoted a tremendous amount of time, leads to the utilization rate of message in mapping process not
Height has a large amount of transmission waste that can all cause in communication in addition, arbitrary website or circuit break down in looped network communication process
It is disconnected, therefore network reliability is poor.
Invention content
In order to overcome the deficiencies in the prior art, it is an object of the present invention to provide a kind of preferential realization most short messages of output
The efficient field bus systems of HEBus and communication means.The communication means can realize looped network and point-to-point two kinds of communication modes,
The transmission of most short message recursion is realized using output is preferential, reduce the work load of main website, improve message profit in communication process
With rate, while having the function of perfect network redundancy and self-recovering function, to ensure the real-time and reliability of data communication, solution
The problems such as existing communication Technology design of having determined is complicated, transmission efficiency is low, reliability is low.
In order to achieve the above-mentioned object of the invention, it solves the problems of in the prior art, the technical solution that the present invention takes
It is：A kind of preferential efficient field bus system communication means of HEBus for realizing most short message of output, includes the following steps：
Step 1, Initialize installation, field bus system after the power is turned on, start to work, main by each website connected in shared bus
It stands and Initialize installation is carried out to each slave station shared in bus, include at least slave station and scan, node address configuration and parameter configuration；
Main website scans all slave stations in bus, obtains the device type and physical resource of slave station, confirms network topology structure, the net
Slave station in network topological structure is referred to as effective slave station；If Initialize installation success, carries out step 3, start data communication；If
It is faulty in initialization procedure, then step 2 is carried out, troubleshooting is carried out.
Step 2, troubleshooting, main website can be according to the error code recorded in communication process, discriminating fault types, processing events
Barrier, concurrently send warning message.
Step 3, looped network communication, main website can periodically send looped network communication frame, and complete main website by looped network communication frame
Data exchange between slave station, slave station and slave station, due to using looped network communication mode, a data frame to want institute in Load System
There is a map information of website, the quantity of slave station is more in system, and the length of data frame is bigger, to reduce message transfer time,
Main website is using the slave station sequence assembling communication data after re-mapping in this system, in such a way that output is preferential, in data field
In only load need write to each slave station physics export resource map information, ensure secured transmission of payload data information, finally will
Assembled data check is transmitted to first slave station；The looped network communication frame can be handled by each slave station reception successively,
Meeting cut data frame after slave station receives, the map information of interception own physical output, adds the map information being physically entered, and will
Data frame after recombination is sent to next slave station or main website, and entire transmission process data frame length can be needed because of the information of each slave station
Automatic variation is asked, the redundancy in transmission process is reduced；In looped network communication process, if breaking down, step is returned to
Rapid 2 carry out troubleshooting, if confirming looped network communication disruption through troubleshooting, carry out step 4, are switched to point-to-point communication, protect
Demonstrate,prove the reliability of network.
Step 4, point-to-point communication are completed the data exchange between main website and slave station for subring Network Communication, were communicated
Cheng Zhong, main website can use polling mode to send point-to-point communication to effective slave station successively according to the sequence of node address from small to large
Frame, in communication process a frame transmission can complete the data exchange of main website and one of slave station；Main website can according to effectively from
The device address assembling point-to-point communication data stood, and data check is packaged generation point-to-point communication frame and is sent to shared bus
On；The point-to-point communication frame will be received by all slave stations in bus, and each slave station is filtered the data frame received,
It is abandoned if the destination address of data frame is not the device address of the slave station, otherwise receives, own physical is extracted from data field
Simultaneously the map information being physically entered is written in data field for the map information of output, and data are verified with packing again, generates response
Data frame is sent to shared bus and waits for that main website receives；It, can be with polling mode after main website receives the responsive data frame of target slave
With next slave station communication；During the point-to-point communication, main website can periodically detect network state, if network recovery
Sub-step (a) in return to step 1 scans all slave stations shared in bus, if all slave stations are all effective slave station, and goes through
History slave station all on-line is then switched to step 3 and restores looped network communication, otherwise returns to step 2 and carry out troubleshooting.
Step 5, ceased communication, when encountering unrecoverable failure in communication process, main website will be switched to idle state, no
Any data frame is sent, entire communication system is stopped；In idle state, main website can be waited for by human-computer interaction module
The startup order of position machine receives return to step 1 after startup order, re-starts initial work.
Initialize installation in the step 1 specifically includes following sub-step：
(a) slave station scans, and after system electrification, main website can carry out full address scanning to all slave stations in bus, according to setting
The sequence of standby address from small to large sends scanning frame to the slave station for specifying address successively, obtains the device type and physics money of slave station
Source confirms network topology structure；There are two types of scan modes for main website：First scan and self- recoverage scanning are led if first scan
When in standing without storage history slave station information, main website can confirm network topology structure according to all slave stations in scanning；If certainly
It is when having stored history slave station information in main website to restore scanning, and main website can carry out information comparison to the slave station on rescaning：It sweeps
The device type for the slave station retouched and device address are identical as the history slave station information stored in main website, then are effective slave station, no
It is then invalid slave station；If invalid slave station, then record error code, illustrate that network topology structure has an exception, it is to be scanned finish it is laggard
Row step 2 carries out troubleshooting.
(b) node address configures, and main website is each in bus to being connected to by network topology structure determined by sub-step (a)
Slave station carries out node address configuration, and main website can be according to the net output valve of each slave station of I/O Resource Calculations of each slave station, the net output
Value refers to that the physics output of each slave station carries out descending arrangement with the difference that is physically entered, with net output valve put in order for respectively from
Configuration node of standing address, in addition, main website also adds oneself to be assigned with the node address of the last one i.e. slave station of node address
1；In node address configuration process, if having configuration time-out or Negative Acknowledgment, step 2 is carried out, carries out troubleshooting；Otherwise, complete
It is configured at node address and carries out next sub-step.
(c) parameter configuration, main website can carry out unified ginseng according to the parameter information of itself to all slave stations in shared bus
Number configuration, configuration parameter are the common parameter of system；Main website can be according to the sequence of node address from small to large successively to specified
The slave station of address sends parameter setting frame, completes the parameter configuration of all slave stations in bus, configures in parameter and is divided into two classes, a kind of
It is the parameter that comes into force, another kind of is that system re-powers the parameter that comes into force；If parameter configuration fails, step 2 is carried out, carries out event
Barrier processing；Otherwise, it completes parameter configuration and carries out next sub-step.
(d) Initialize installation success carries out step 3, looped network communication is carried out between each website.
Troubleshooting in the step 2 is specially：In communication process, the communication management module of main website can be according to main website
Fault detection module record error code, discriminating fault types, to field bus system carry out troubleshooting, if failure can be extensive
It is multiple, then continue to communicate by step 4, if failure is irrecoverable, carries out step 5, stop communication.
Looped network communication frame in the step 3 includes node address, frame type, data field length, data field and check code；
The looped network communication frame can be first passed through the maximum slave station of net output valve, then be passed through using output mode of priority transmission, data frame
The big slave station of net output valve time, passes through all slave stations successively, finally by the slave station of net output valve minimum back to main website processing；Communication
In the process, it refers to that data frame passes through that the data field of the looped network communication frame, which uses dynamic allocation mode, the dynamic allocation mode,
When each slave station, output data is first obtained from the initial address of data field from standing-meeting, then input is inserted into from the tail address of data field
Data, and change data length；Overall process data field length can be and more by few change by changeable few, ensure that transmission data is to have
Data are imitated, the time waste of transmission process is reduced；The looped network communication frame can pass through all slave stations in a manner of recursion, final to return
Main website processing is given, in each communication cycle, main website need to only send that a data frame can be completed and the data of all slave stations are handed over
It changes, to which all slave stations in bus are shared in control, realizes the looped network communication control of high speed.
Point-to-point communication frame in the step 4 includes device address, frame type, data field and check code；Communication process
In, sequence of the main website according to node address from small to large first assembles one according to the map information of the slave station of node address minimum
Item only has the point-to-point communication frame of the slave station output data, is sent to the slave station；The slave station of node address minimum receives data
It is specified from data field after frame and obtains the output data of itself in address, and the input data of itself is inserted into data field, again school
It tests and transmits to main website；Main website receives dissection process after the responsive data frame of the slave station, then small according to node address time
The map information of slave station re-assembly point-to-point communication frame and node address time small slave station and carry out data interaction, class successively
It pushes away, main website carries out data exchange using polling mode and all slave stations in bus.
In the step 3,4 communication process other than calling looped network communication frame and point-to-point communication frame, also have invoked more
The content of the data frame of type, these data frames includes sequentially connected destination address, is node address or device address, frame
Type, data field and check code, data frame type include：
(1) device scan frame, in step 1 sub-step (a), the sending device of main website address one by one when Initialize installation
Scanning frame, scans all slave stations shared in bus, and the quantity of device type and physical resource for obtaining slave station confirms net
Network topological structure.
(2) response frame is scanned, in step step 1 sub-step (a), the device scan frame that response main website is sent to be described
The frame type field of data frame is identical as device scan frame, can be according to the device address of itself after slave station receiving device scanning frame
Selection is received or is abandoned, and the quantity of the device type of itself and physical resource is sent to main website if receiving.
(3) node address configures frame, in step 1 sub-step (b), after the completion of scanning, main website can be according to node address
Sequence from small to large is successively to the slave station sending node address configuration frame of specified address；After slave station receives processing node configuration frame
Corresponding response frame can be sent to main website, while slave station needs to preserve node address, is used for subsequent parameter configuration and data
Communication.
(4) parameter configuration frame, in step 1 sub-step (c), behind configuration node address, main website to be according to node address
Parameter setting is carried out to effective slave station, main website sends parameter setting frame using broadcast mode, completes the ginseng of all slave stations in bus
Number configuration.
The preferential efficient field bus systems of HEBus for realizing most short message of a kind of output, including main website, shared bus
And the 1st, 2 ... n slave stations, the main website, as the key control unit of system, including synchronous processing module, human-computer interaction module,
It is communication management module, slave station scan module, node address configuration module, parameter configuration module, looped network communication module, point-to-point logical
Believe module, fault detection module and main website data transmission module；The communication management module respectively with synchronous processing module, man-machine
Interactive module, fault detection module, slave station scan module, node address configuration module, parameter configuration module, looped network communication module
And point-to-point communication module is connected, the slave station scan module, node address configuration module, parameter configuration module, looped network communication
Module and point-to-point communication module are connected with main website data transmission module, the main website data transmission module by itself
RS485 interfaces are connected with shared bus；Described 1st, 2 ... n slave stations, as the extension I/O module of main website, including the 1st, 2 ... n from
It stands data transmission module and the 1st, 2 ... the n communication analysis modules that are connected respectively with the 1st, 2 ... n slave station data transmission modules, it is described
1st, 2 ... n slave stations data transmission modules are connected with shared bus respectively by the RS485 interfaces of itself.
Present invention has the advantages that：A kind of output is preferential to realize the efficient field bus system communications of the HEBus of most short message
Method includes the following steps：1, Initialize installation, 2, troubleshooting, 3, looped network communication, 4, point-to-point communication, 5, ceased communication.
Compared with the prior art, the invention has the advantages that：(1) looped network communication frame of the invention is realized most using output is preferential
Short message recursion is transmitted, and data field uses dynamic allocation mode, ensures that transmission data is valid data, reduces transmission process
Time waste, be greatly improved its data transmission efficiency.(2) in the present invention, main website can be arranged according to the descending of net output valve
For each slave station re-mapping, optimal data transfer path is provided, further increases its data transmission efficiency.(3) of the invention
Using looped network communication mode, a frame transmission can be only needed mutually into row data communication between slave station, so that it may with complete main website with
The data exchange of all slave stations significantly reduces the burden of main website, improves the execution efficiency of the control logic of main website.(4) originally
Invention can only need a frame transmission, can complete main website and its by transmitting point-to-point communication frame during point-to-point communication
In a specified slave station data exchange, communication mode is simple, be conducive to exploitation.(5) present invention utilizes the physics for sharing bus
Wiring advantage, realizes network redundancy and self-recovering function between looped network communication and point-to-point communication, and main website can be periodic
Network state is detected, ensure that the reliability of data communication.
Description of the drawings
Fig. 1 is the efficient field bus system network topology structure schematic diagrames of HEBus of the present invention.
Fig. 2 is the efficient field bus system structural schematic diagrams of HEBus of the present invention.
Fig. 3 is the method for the present invention flow chart of steps.
Data frame format schematic diagram when Fig. 4 is the method for the present invention step 3 middle ring Network Communication.
Data frame format schematic diagram when Fig. 5 is point-to-point communication in the method for the present invention step 4.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the network topology structure of the efficient field bus systems of HEBus, including main website share bus and the 1st,
2 ... n slave stations use bus connecting mode, i.e. main website and each slave station to be connected to by the RS485 interfaces of itself in physical connection
On data/address bus.It is using looped network communication mode, the processing path of data frame in data communication：Main website, node address are 1
1st slave station S-1, the 2nd slave station S-2 that node address is 2, the 3rd slave station S-3 that node address is 3 ..., node address be n
N-th slave station S-n, main website constitute a ring type structure in processing path.After the network topology structure of confirmation system, main website
It can be put in order according to the descending of the net output valve of each slave station, be each slave station distribution node address.
As shown in Fig. 2, a kind of preferential efficient field bus systems of HEBus for realizing most short message of output, including main website, altogether
Enjoy bus and the 1st, 2 ... n slave stations, the main website, as the key control unit of system, including synchronous processing module, man-machine friendship
Mutual module, communication management module, slave station scan module, node address configuration module, parameter configuration module, looped network communication module,
Point-to-point communication module, fault detection module and main website data transmission module.The synchronous processing module and communication management module
It is connected, is mainly used for synchronizing the physical resource of each slave station, by the physical resource of each slave station being mapped in main website orderly, by main website
Unified management and control.The human-computer interaction module is connected with communication management module, is mainly used for the working condition of monitoring system,
Interface as host computer and bus system.Central processing unit of the communication management module as main website is located with synchronous respectively
Manage module, human-computer interaction module, fault detection module, slave station scan module, node address configuration module, parameter configuration module,
Looped network communication module and point-to-point communication module are connected, and are mainly used for completing node state scheduling and the management of entire communication system, right
Other modules are managed and control.Wherein, the slave station scan module is mainly used for scanning all slave stations in shared bus,
Confirm network topology structure.The fault detection module is mainly for detection of the failure occurred in entire communication process.The section
Dot address configuration module is mainly used for carrying out node address configuration to effective slave station, with distributing unique node to each slave station
Location.The parameter configuration module is mainly used for carrying out parameter configuration to slave station.The looped network communication module is mainly used for completing master
The looped network communication stood between slave station.The point-to-point communication module is mainly used for that the looped network communication module is assisted to complete main website
Data exchange between slave station.The slave station scan module, node address configuration module, parameter configuration module, looped network communication
Module and point-to-point communication module are connected with main website data transmission module, the main website data transmission module by itself
RS485 interfaces are connected with shared bus, are mainly used for from transceiving data frame in shared bus.
Described 1st, 2 ... n slave stations, as the extension I/O module of main website, including the 1st, 2 ... n slave stations data transmission modules and
The 1st, 2 ... n communication analysis modules being connected respectively with the 1st, 2 ... n slave station data transmission modules, be mainly used for parsing and handle by
The data frame that slave station data transmission module receives.Described 1st, the RS485 interfaces that 2 ... n slave stations data transmission modules pass through itself
It is connected respectively with shared bus, it is identical with the main website data transmission module function, it is used for from transceiving data frame in shared bus.
As shown in Fig. 2, a kind of preferential efficient field bus system communication means of HEBus for realizing most short message of output, packet
Include following steps：
After the power is turned on, each website connected in shared bus is started to work for step 1, field bus system, and main website is to shared total
Each slave station on line carries out Initialize installation, includes at least slave station and scans, node address configuration and parameter configuration；Main website scanning is total
All slave stations on line obtain the device type and physical resource of slave station, confirm network topology structure, the network topology structure
In slave station be referred to as effective slave station；If Initialize installation success, carries out step 3, start data communication；If initialization procedure
In it is faulty, then carry out step 2, carry out troubleshooting.
Step 2, troubleshooting, main website can be according to the error code recorded in communication process, discriminating fault types, processing events
Barrier, concurrently send warning message.
Step 3, looped network communication, looped network communication main station can periodically send looped network communication frame, due to being communicated using looped network
Mode, a data frame want the map information of all websites in Load System, and the quantity of slave station is more in system, the length of data frame
Degree is bigger, to reduce message transfer time, in this system main website using the slave station sequence assembling communication data after re-mapping,
In such a way that output is preferential, the map information for needing to write and exporting resource to the physics of each slave station is only loaded within a data area, is protected
Secured transmission of payload data information is demonstrate,proved, finally transmits assembled data check to first slave station；The looped network communication
Frame can be handled by each slave station reception successively, meeting cut data frame after slave station receives, the map information of interception own physical output,
The map information being physically entered is added, and the data frame after recombination is sent to next slave station or main website, entire transmission process
Data frame length can automatically change because of the information requirement of each slave station, reduce the redundancy in transmission process；
Specific communication process is that the communication management module of main website is notified that mapping of the looped network communication module according to effective slave station
Information assembles communication data, and data check is packaged into data frame by main website data transmission module and is sent in shared bus；
The data frame will be received by all slave stations in bus, and each slave station is received using the data transmission module filtering of oneself
Data frame verifies the data of reception if the destination node address of data frame is the node address of the slave station, if verification
Correctly, buffer-stored is carried out, and communication analysis module is notified to parse the data；Communication analysis module is originated from data field
The corresponding map information being physically entered simultaneously is inserted into the tail address of data field by the map information of address interception physics output, and will
Node address adds 1, and carrying out verification again to modified data by the slave station data transmission module is packaged, and generates new number
The website of next node address is sent to according to frame.
In looped network communication process, if breaking down, return to step 2 carries out troubleshooting；If confirming through troubleshooting
Looped network communication disruption then carries out step 4, is switched to point-to-point communication, ensures the reliability of network.
Step 4, point-to-point communication are completed the data exchange between main website and slave station for subring Network Communication, were communicated
Cheng Zhong, main website can use polling mode to send point-to-point communication to effective slave station successively according to the sequence of node address from small to large
Frame, in communication process a frame transmission can complete the data exchange of main website and one of slave station；Main website can according to effectively from
The device address assembling point-to-point communication data stood, and data check is packaged generation point-to-point communication frame and is sent to shared bus
On；The point-to-point communication frame will be received by all slave stations in bus, and each slave station is filtered the data frame received,
It is abandoned if the destination address of data frame is not the device address of the slave station, otherwise receives, own physical is extracted from data field
Simultaneously the map information being physically entered is written in data field for the map information of output, and data are verified with packing again, generates response
Data frame is sent to shared bus and waits for that main website receives；It, can be with polling mode after main website receives the responsive data frame of target slave
With next slave station communication；
Specific communication process is that the communication management module of main website is notified that point-to-point communication module setting according to effective slave station
Standby group of addresses decorates point to-point communication data, and by main website data transmission module by data check be packaged into data frame be sent to it is shared
In bus；The data frame will be received by all slave stations in bus, and each slave station is docked using the data transmission module of oneself
The data frame received is filtered, and is abandoned if the destination address of data frame is not the device address of the slave station, otherwise to receiving
Data verified, if verification is correct, carry out buffer-stored, and communication analysis module is notified to parse the data, lead to
Letter parsing module can extract the map information that own physical exports from data field and by the corresponding map information being physically entered
It is written in data field, data is repacked by the slave station data transmission module, are verified, generate responsive data frame,
And it is sent to shared bus and waits for that main website receives.It, can be with polling mode under after main website receives the responsive data frame of target slave
One slave station communication.
During point-to-point communication, main website can periodically detect network state, whether confirm network topology structure
It is recovered, automatically switch back into looped network communication mode if restoring.In this example, after system switchs to point-to-point communication, main website hair
Send point-to-point communication frame successively with all slave station communications.It not being responded to for continuous 5 times when some slave station, then it is assumed that the slave station goes offline,
To improve the real-time of communication, later no longer per the wheel scan slave station, but it is primary with the slave station communication that goes offline every 20 wheels, if
The slave station that goes offline has response, then next round continues to communicate, and continuously has response three times, then it is assumed that the equipment on-line, if it is all from
Stand all online, then 1 sub-step (a) of return to step, scan share bus on all slave stations, if all slave stations all be effectively from
It stands, and history slave station all on-line, then switches back into step 3 and restore looped network communication, otherwise return to step 2 carries out troubleshooting.
Step 5, ceased communication, when encountering unrecoverable failure in communication process, main website will be switched to idle state, no
Any data frame is sent, entire communication system is stopped.In idle state, main website can be waited for by human-computer interaction module
The startup order of position machine receives return to step 1 after startup order, re-starts initial work.
In the step 1, Initialize installation specifically includes following sub-step：
(a) slave station scans：After system electrification, main website can carry out full address scanning to all slave stations in bus, according to setting
The sequence of standby address from small to large sends scanning frame to the slave station for specifying address successively, obtains the device type and physics money of slave station
Source confirms network topology structure；There are two types of scan modes for main website：First scan and self- recoverage scanning are led if first scan
Main website can store the device type of each slave station and the quantity of physical resource when not having to store history slave station information in standing, and establish new
Network topology structure.If self- recoverage scanning be main website in stored history slave station information when, main website can be to rescaning on
All slave stations carry out information comparison：The history slave station stored in the device type of slave station in scanning and device address and main website
Information is identical, then is effective slave station, is otherwise invalid slave station；If there is invalid slave station, error code is recorded, illustrates network topology knot
Structure has exception, carries out step 2 after to be scanned, carries out troubleshooting；Otherwise, that is, device scan is completed, next sub-step is carried out
Suddenly；
(b) node address configures：As shown in Figure 1, main website by network topology structure determined by sub-step (a) to being connected to
Each slave station in bus carries out node address configuration, and the node address that main website distributes to slave station is continuous and unduplicated, master
According to the net output valve of each slave station of I/O Resource Calculations of each slave station, (the net output valve refers to that the physics of each slave station exports for standing-meeting
With the difference being physically entered) descending arrangement is carried out, with putting in order as each slave station configuration node address for net output valve.It is wherein same
Order-assigned node address between the slave station of one type according to device address from small to large, after main website configures all slave stations
A node address can be distributed to oneself, which is n+1.When carrying out looped network communication, main website and other n are a from standing-meeting
Form a ring network for having n+1 node.This method of salary distribution is used to be carried for the dynamic allocation of subsequent looped network communication frame
Basis is supplied.In node address configuration process, if having configuration time-out or Negative Acknowledgment, step 2 is carried out, carries out troubleshooting；
Otherwise, node address is completed to configure and carry out next sub-step；
(c) parameter configuration：Main website can carry out unified ginseng according to the parameter information of itself to all slave stations in shared bus
Number configuration, configuration parameter are the common parameter of system, including：Map retention time, messaging parameter etc..Main website uses broadcaster
Formula sends parameter setting frame, completes the parameter configuration of all slave stations in bus, configures in parameter and is divided into two classes, one kind is raw immediately
Parameter is imitated, such as maps the retention time, another kind of is that system re-powers the parameter that comes into force, such as messaging parameter；If parameter configuration fails,
Step 2 is then carried out, troubleshooting is carried out；Otherwise, it completes parameter configuration and carries out next sub-step.
(d) Initialize installation success carries out step 3, looped network communication is carried out between each website.
In the step 2, troubleshooting is specially：In communication process, the communication management module of main website can be according to main website
Fault detection module record error code, discriminating fault types, to field bus system carry out troubleshooting, if failure can be extensive
It is multiple, then continue to communicate by step 4, if failure is irrecoverable, carries out step 5, stop communication.
In the step 3, the data exchange between main website and slave station, slave station and slave station is completed by looped network communication frame, such as
Shown in Fig. 4, the node address of this example middle ring Network Communication frame is 1 byte (content is 1~255), and frame type is 1 byte (content
For 0x43), data field length is 2 bytes (content is data field byte number), and data field is that (content is each slave station to 0~512 byte
The output of mapping, input data), check code is 2 bytes (content is the cyclic redundancy check code of data frame).Looped network communication frame is adopted
With output mode of priority transmission, data frame can first pass through the maximum 1st slave station s-1 of net output valve, then pass through net output valve time
The 2nd big slave station s-2, successively by all slave stations finally by the n-th slave station s-n of net output valve minimum back to main website processing.It is logical
During letter, it refers to data frame warp that the data field of the looped network communication frame, which uses dynamic allocation mode, the dynamic allocation mode,
When crossing each slave station, output data is first obtained from the initial address of data field from standing-meeting, then insertion is defeated from the tail address of data field
Enter data, and changes data length；Overall process data field length can be and more by few change by changeable few, ensure that transmission data is
Valid data reduce the time waste of transmission process.As shown in figure 4, in this example, main website is according to the mapping of each slave station first
The looped network communication frame that information assembles one article of only output data is sent to the 1st slave station s-1, from data after the 1st slave station s-1 receptions
It obtains the output data of itself in area's initial address, then is inserted into from the tail address of data field the input data of itself and changes number
According to length, by node address plus 1, verification again is transmitted to the 2nd slave station s-2；2nd slave station s-2 repeats the 1st slave station s-1's
Data frame is issued the 3rd slave station s-3 by work, and so on, this looped network communication frame have passed through all slave stations in a manner of recursion, most
Eventually back to main website processing.In each communication cycle, main website, which need to only send a data frame, can complete number with all slave stations
According to exchange the looped network communication control of high speed is realized to which all slave stations in bus are shared in control.In addition, in transmission process,
The live load for greatly reducing main website improves the execution efficiency of the control logic of main website.
In the step 4, the data exchange between main website and slave station is completed by point-to-point communication frame, as shown in figure 5, institute
The device address for stating point-to-point communication frame is 1 byte (content is 1~255), and frame type is 1 byte (content 0x44), data
Area is 0~512 byte (content is the output of each slave station mapping, input data, can be attached to the map information of each slave station), check code
For 2 bytes (content is the cyclic redundancy check code of data frame).Main website is according to node address sequence from small to large successively to referring to
Effective slave station of locking equipment address sends point-to-point communication frame, in communication process a frame transmission can complete main website and wherein one
The data exchange of a specified slave station.As shown in figure 5, main website first assembles one article only the according to the map information of the 1st slave station s-1
The point-to-point communication frame of the output data of 1 slave station s-1 is sent to the 1st slave station s-1；1st slave station s-1 is received after data frame from number
It is specified according to area and obtains the output data of itself in address, and the input data of itself is inserted into data field, verification again is packaged hair
Give main website；Main website receives dissection process after the responsive data frame of the 1st slave station s-1, and is believed according to the mapping of the 2nd slave station s-2
Breath re-assemblies point-to-point communication frame and the 2nd slave station s-2 carries out data interaction, and so on, main website is using polling mode and always
All slave stations on line carry out data exchange.
In entire communication process other than calling looped network communication frame and point-to-point communication frame, also have invoked a plurality of types of
The content of data frame, these data frames includes sequentially connected destination address (for node address or device address), frame type, number
According to area and check code, data frame type includes：
Device scan frame, in step 1 sub-step (a), the sending device of main website address one by one is swept when Initialize installation
Frame is retouched, all slave stations shared in bus are scanned, the quantity of device type and physical resource for obtaining slave station confirms network
Topological structure.The destination address of device scan frame is 1 byte (content is 1~255, is the device address of slave station), and frame type is 1
Byte (content 0x41), data field are 0 byte (being not necessarily to data content), and check code is that (content is the cycle of data frame to 2 bytes
Redundancy check code).
Response frame is scanned, in step 1 sub-step (a), responding the device scan frame that main website is sent, the data frame
Frame type field is identical as device scan frame, indicates that the data frame is the response frame of device scan frame.Slave station receiving device scans
After frame, it can select to receive according to the device address of itself or abandon, by the device type of itself and physical resource if receiving
Quantity is sent to main website.The destination address for scanning response frame is 1 byte (content is 1~255, is the device address of slave station), frame
Type is 1 byte (content 0x41), and data field is 6 bytes (content is slave station equipment type and the quantity of physical resource), school
It is 2 bytes to test code (content is the cyclic redundancy check code of data frame).In this example, the slave station equipment type of data field field is
1 byte (content is 1~255, indicates the corresponding ID of device type), the quantity of physical resource is 4 bytes, and each byte corresponds to one
The quantity of kind physical resource, it is defeated including digital quantity input (DI), analog input (AI), digital output (DQ), analog quantity altogether
Go out (AQ) 4 kinds of physical resources.
Node address configures frame, and in step 1 sub-step (b), after the completion of scanning, main website can be according to node address from small
To big sequence successively to the slave station sending node address configuration frame of specified address.Slave station can be given after receiving processing node configuration frame
Main website sends corresponding response frame, while slave station needs to preserve node address, is communicated for subsequent parameter configuration and data.
The destination address of node address configuration frame is 1 byte (content is 1~255, is the device address of slave station), and frame type is 1 byte
(content 0x42), data field are that (content is the node address that need to be configured to 1~512 byte, can be attached to physics resource impact number
Amount, the map informations such as mapping address), check code is 2 bytes (content is the cyclic redundancy check code of data frame).
Parameter configuration frame, in step 1 sub-step (c), behind configuration node address, main website to be according to node address to effective
Slave station carries out parameter setting, and main website sends parameter setting frame using broadcast mode, completes the parameter configuration of all slave stations in bus,
Ensure that the messaging parameter of all slave stations is all consistent with the messaging parameter of main website.The destination address of parameter configuration frame is 1 byte
(content is 1~255, is the node address of slave station), frame type are 1 byte (content 0x45), and data field is 0~512 word
Section, check code is 2 bytes (content is the cyclic redundancy check code of data frame)；The content of parameter information field can be according to different realities
Example needs to adjust, and the field includes mapping retention time, messaging parameter in this example, wherein the mapping retention time is
Referring to the time that mapping is kept between main website and slave station, i.e., whether in communication process, being monitored in real time from standing-meeting in bus has data frame,
If mapping the retention time in without any data frame if think that system communication has terminated, it is defeated that physics is automatically closed from standing-meeting
Go out, main website is waited for re-establish connection；In this example messaging parameter field mainly include communication baud rate, check bit, data bit,
Stop position, slave station can be stored in FLASH after obtaining messaging parameter, will not be used immediately, ensure that present communications will not be by
The influence of new messaging parameter, new messaging parameter come into force after re-powering.
Filtering, the verification of above-mentioned data frame are packaged work and are all completed by the data transmission module at master and slave station.
In step 1 sub-step (b), main website, can be defeated according to the physics of each slave station before carrying out node address configuration
The net output valve for entering to export each slave station of Resource Calculation carries out descending arrangement, with putting in order as each slave station configuration section for net output valve
Dot address.Specific computational methods are as follows：
In this example, 4 kinds of physical resources DI, AI, DQ are represented using variables D iNum, AiNum, DqNum, AqNum, AQ's
Mapping amount.
In looped network communication frame, the mapping space of slave station is distributed as unit of word, uses num0, num1, num2, num3 points
The word length for not representing the mapping space that 4 kinds of physical resources of each slave station are occupied, since the mapping resource of DI, DQ are one
One, if inadequate integral words, need according to whole word processing, specific formula for calculation is：
A) (DqNum+15)/16 (1) num0=
B) (2) num1=AqNum
C) (DiNum+15)/16 (3) num2=
D) (4) num3=AiNum
Show that the net output valve of each slave station is by formula (1), (2), (3) and (4)：
E) (5) y=num0+num1-num2-num3
The descending of the net output valve of node address basic of distribution puts in order distribution, and the net bigger node address of output valve is smaller.
The preferential distribution method of this output, ensure that most shortization of data frame in transmission process, saves transmission time, reduce number
According to the time waste in frame transmission process.
The invention has the advantages that：The efficient field bus systems of HEBus and the communication of most short message are preferentially realized in a kind of output
Method, communication process realize the transmission of most short message recursion using output is preferential, and data field uses dynamic allocation mode, main website according to
The descending of net output valve is arranged as slave station re-mapping, provides optimal data transfer path, reduce transmission process when
Between waste, be greatly improved data transmission efficiency.
Claims (6)
1. a kind of preferential efficient field bus system communication means of HEBus for realizing most short message of output, it is characterised in that including
Following steps：
Step 1, Initialize installation, field bus system after the power is turned on, start to work, main website pair by each website connected in shared bus
Each slave station in shared bus carries out Initialize installation, includes at least slave station and scans, node address configuration and parameter configuration；Main website
All slave stations in bus are scanned, the device type and physical resource of slave station are obtained, confirm that network topology structure, the network are opened up
The slave station flutterred in structure is referred to as effective slave station；If Initialize installation success, carries out step 3, start data communication；If initial
It is faulty during change, then step 2 is carried out, troubleshooting is carried out；Initialize installation in the step 1 specifically includes following son
Step：
(a) slave station scans：After system electrification, main website can carry out full address scanning to all slave stations in bus, according to equipment
The sequence of location from small to large sends scanning frame to the slave station for specifying address successively, obtains the device type and physical resource of slave station,
Confirm network topology structure；There are two types of scan modes for main website：First scan and self- recoverage scanning, if in first scan, that is, main website
When not storing history slave station information, main website can confirm network topology structure according to all slave stations in scanning；If self- recoverage
Scanning is when having stored history slave station information in main website, and main website can carry out information comparison to the slave station on rescaning：In scanning
Slave station device type and device address it is identical as the history slave station information stored in main website, then be effective slave station, otherwise for
Invalid slave station；If invalid slave station, then error code is recorded, illustrates that network topology structure has exception, walked after to be scanned
Rapid 2, carry out troubleshooting；
(b) node address configures：Main website is by network topology structure determined by sub-step (a) to each slave station for being connected in bus
Node address configuration is carried out, main website can be according to the net output valve of each slave station of I/O Resource Calculations of each slave station, the net output valve
The physics output for referring to each slave station carries out descending arrangement with the difference being physically entered, and is matched for each slave station with putting in order for net output valve
Node address is set, in addition, main website also adds 1 oneself to be assigned with the node address of the last one i.e. slave station of node address；
In node address configuration process, if having configuration time-out or Negative Acknowledgment, step 2 is carried out, carries out troubleshooting；Otherwise, section is completed
Dot address configures and carries out next sub-step；
(c) parameter configuration：Main website can carry out unified parameter to all slave stations in shared bus according to the parameter information of itself and match
It sets, configuration parameter is the common parameter of system；Main website can be according to the sequence of node address from small to large successively to specifying address
Slave station send parameter setting frame, complete bus on all slave stations parameter configuration, configure parameter in be divided into two classes, one kind is vertical
Come into force parameter, and another kind of is that system re-powers the parameter that comes into force；If parameter configuration fails, step 2 is carried out, is carried out at failure
Reason；Otherwise, it completes parameter configuration and carries out next sub-step；
(d) Initialize installation success carries out step 3, looped network communication is carried out between each website；
Step 2, troubleshooting, main website can be according to the error code recorded in communication process, discriminating fault types, handling failure, and
Send warning message；In communication process, the communication management module of main website can be according to the event of the fault detection module of main website record
Hinder code, discriminating fault types carry out troubleshooting to field bus system and continue to lead to by step 4 if failure can be restored
Letter carries out step 5 if failure is irrecoverable, stops communication；
Step 3, looped network communication, main website can periodically send looped network communication frame, and by looped network communication frame complete main website and from
It stands, the data exchange between slave station and slave station, due to using looped network communication mode, a data frame to want all stations in Load System
The map information of point, the quantity of slave station is more in system, and the length of data frame is bigger, and to reduce message transfer time, this is
Tong Zhong main websites utilize the slave station sequence assembling communication data after re-mapping, in such a way that output is preferential, within a data area only
The map information for needing to write and exporting resource to the physics of each slave station is loaded, ensures secured transmission of payload data information, it finally will assembling
Good data check is transmitted to first slave station；The looped network communication frame can be handled by each slave station reception successively, slave station
Meeting cut data frame after reception, the map information of interception own physical output add the map information being physically entered, and will recombination
Data frame afterwards is sent to next slave station or main website, entire transmission process data frame length can because each slave station information requirement from
Dynamic variation reduces the redundancy in transmission process；In looped network communication process, if break down, return to step 2 into
Row troubleshooting carries out step 4 if confirming looped network communication disruption through troubleshooting, is switched to point-to-point communication, ensures network
Reliability；
Step 4, point-to-point communication complete the data exchange between main website and slave station for subring Network Communication, in communication process,
Main website can use polling mode to send point-to-point communication frame to effective slave station successively according to the sequence of node address from small to large, lead to
A frame transmission can complete the data exchange of main website and one of slave station during letter；Main website can setting according to effective slave station
Standby group of addresses decorates point to-point communication data, and data check is packaged generation point-to-point communication frame and is sent in shared bus；Institute
Stating point-to-point communication frame will be received by all slave stations in bus, and each slave station is filtered the data frame received, if number
Destination address according to frame is not that the device address of the slave station then abandons, and is otherwise received, and own physical output is extracted from data field
Map information and the map information being physically entered is written in data field, data are verified with packings again, generation response data
Frame is sent to shared bus and waits for that main website receives；It, can be with polling mode under after main website receives the responsive data frame of target slave
One slave station communication；During the point-to-point communication, main website can periodically detect network state, be returned if network recovery
Sub-step (a) in step 1, scan share bus on all slave stations, if all slave stations all be effective slave station, and history from
It stands all on-line, is then switched to step 3 and restores looped network communication, otherwise return to step 2 and carry out troubleshooting；
Step 5, ceased communication, when encountering unrecoverable failure in communication process, main website will be switched to idle state, not send
Any data frame, entire communication system are stopped；In idle state, main website can wait for host computer by human-computer interaction module
Startup order, receive startup order after return to step 1, re-start initial work.
2. the preferential efficient field bus system communication parties of HEBus for realizing most short message of a kind of output according to claim 1
Method, it is characterised in that：Troubleshooting in the step 2 is specially：In communication process, the communication management module of main website can root
According to the error code that the fault detection module of main website records, discriminating fault types carry out troubleshooting to field bus system, if therefore
Barrier can restore, then continue to communicate by step 4, if failure is irrecoverable, carry out step 5, stop communication.
3. the preferential efficient field bus system communication parties of HEBus for realizing most short message of a kind of output according to claim 1
Method, it is characterised in that：Looped network communication frame in the step 3 include node address, frame type, data field length, data field and
Check code；The looped network communication frame can first pass through the maximum slave station of net output valve using output mode of priority transmission, data frame, so
Afterwards by the big slave station of net output valve time, pass through all slave stations successively, finally by the slave station of net output valve minimum back to main website
Reason；In communication process, the data field of the looped network communication frame uses dynamic allocation mode, and the dynamic allocation mode refers to data
When frame passes through each slave station, first output data is obtained from the initial address of data field from standing-meeting, then from the tail address of data field it is slotting
Enter input data, and changes data length；Overall process data field length can be and more by few change by changeable few, ensure transmission data
It is valid data, reduces the time waste of transmission process；The looped network communication frame can pass through all slave stations in a manner of recursion,
It is finally handled back to main website, in each communication cycle, main website need to only send a data frame and can complete and all slave stations
Data exchange realizes the looped network communication control of high speed to which all slave stations in bus are shared in control.
4. the preferential efficient field bus system communication parties of HEBus for realizing most short message of a kind of output according to claim 1
Method, it is characterised in that：Point-to-point communication frame in the step 4 includes device address, frame type, data field and check code；It is logical
During letter, sequence of the main website according to node address from small to large, first according to the map information group of the slave station of node address minimum
A point-to-point communication frame for there was only the slave station output data has been filled, the slave station is sent to；The slave station of node address minimum receives
It is specified from data field after to data frame and obtains the output data of itself in address, and the input data of itself is inserted into data field,
Again verification is transmitted to main website；Main website receives dissection process after the responsive data frame of the slave station, then according to node
The map information of the small slave station in location time re-assemblies point-to-point communication frame and carries out data interaction with the small slave station of node address time, according to
Secondary to analogize, main website carries out data exchange using polling mode and all slave stations in bus.
5. the preferential efficient field bus system communication parties of HEBus for realizing most short message of a kind of output according to claim 1
Method, it is characterised in that：In the step 3,4 communication process other than calling looped network communication frame and point-to-point communication frame, also adjust
Content with a plurality of types of data frames, these data frames includes sequentially connected destination address, is node address or equipment
Address, frame type, data field and check code, data frame type include：
(1) device scan frame, in step 1 sub-step (a), the sending device scanning of main website address one by one when Initialize installation
Frame, scans all slave stations shared in bus, and the quantity of device type and physical resource for obtaining slave station confirms that network is opened up
Flutter structure；
(2) response frame is scanned, in step 1 sub-step (a), responding the device scan frame that main website is sent, the data frame
Frame type field is identical as device scan frame, after slave station receiving device scanning frame, can select to receive according to the device address of itself
Or abandon, the quantity of the device type of itself and physical resource is sent to main website if receiving；
(3) node address configures frame, and in step 1 sub-step (b), after the completion of scanning, main website can be according to node address from small
To big sequence successively to the slave station sending node address configuration frame of specified address；Slave station can be given after receiving processing node configuration frame
Main website sends corresponding response frame, while slave station needs to preserve node address, is communicated for subsequent parameter configuration and data；
(4) parameter configuration frame, in step 1 sub-step (c), behind configuration node address, main website to be according to node address to having
It imitates slave station and carries out parameter setting, main website sends parameter setting frame using broadcast mode, and the parameter for completing all slave stations in bus is matched
It sets.
6. the efficient fieldbus systems of HEBus of most short message are preferentially realized in a kind of output in method according to claim 1
System, including main website, shared bus and the 1st, 2 ... n slave stations, it is characterised in that：The main website, the core as system control single
Member, including synchronous processing module, human-computer interaction module, communication management module, slave station scan module, node address configuration module,
Parameter configuration module, looped network communication module, point-to-point communication module, fault detection module and main website data transmission module；It is described
Communication management module respectively with synchronous processing module, human-computer interaction module, fault detection module, slave station scan module, node
Location configuration module, parameter configuration module, looped network communication module and point-to-point communication module are connected, the slave station scan module, section
Dot address configuration module, parameter configuration module, looped network communication module and point-to-point communication module with main website data transmission module
It is connected, the main website data transmission module is connected by the RS485 interfaces of itself with shared bus；Described 1st, 2 ... n slave stations,
As the extension I/O module of main website, including the 1st, 2 ... n slave stations data transmission modules and respectively with the 1st, 2 ... n slave station data transmissions
The 1st, 2 ... connected n communication analysis modules of module, the described 1st, 2 ... n slave stations data transmission modules are connect by the RS485 of itself
Mouth is connected with shared bus respectively.
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