CN101371206A - Wireless field bus management - Google Patents
Wireless field bus management Download PDFInfo
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- CN101371206A CN101371206A CNA2007800029915A CN200780002991A CN101371206A CN 101371206 A CN101371206 A CN 101371206A CN A2007800029915 A CNA2007800029915 A CN A2007800029915A CN 200780002991 A CN200780002991 A CN 200780002991A CN 101371206 A CN101371206 A CN 101371206A
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- 238000004891 communication Methods 0.000 claims abstract description 49
- 230000002093 peripheral effect Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 18
- 238000007726 management method Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004886 process control Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241000282485 Vulpes vulpes Species 0.000 description 1
- 125000002015 acyclic group Chemical group 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to a communication system for interchanging data in an automation system for communication between central and peripheral devices. A converter (20) is connected into the communication path between the central devices (10) and peripheral devices (31 ... 3n), said converter being uniquely assigned a predefinable number of peripheral devices (31 ... 3n) and being designed for line-bound communication (40) with the central device (10) and for wireless communication (50) with the peripheral devices (31 ... 3n).
Description
Thereby the present invention relates to be used for carrying out the communication system that exchanges data communicates between center fixture and peripheral device in automation equipment.
To be known that in order on the on-the-spot aspect of automation equipment, communicating by letter, to adopt so-called field bus system.In the bus system, in the equipment or in the I/O assembly that disperses measured value is carried out digitizing at the scene at the scene, and then measured value is delivered to a higher level's controller by a fieldbus networks.Need at least one to communicate to connect feed with assembly for this reason.
Have such bus system, wherein feed is with communicate by letter can be by same lead to carrying out (for example PROFIBS PA, foundation fieldbus).
Relevant with network structure, all field apparatuss are connected with the fieldbus networks electric current.Like this, a fault that only relates to a user can have influence on whole network, thereby makes all other user's data transmit the no longer possibility that becomes equally, and is disturbed at least significantly.Disturbing under extreme case may be very strong, causes the damage that can not repair.Short circuit, lead disconnect, EMV disturbs and thunderbolt for mainly containing of belonging in technological process apparatus that this quasi-representative disturbs.
The operator also is regarded as disturbing to the intervention of having a mind to that automation component carries out in addition.This intervention is essential for the purpose of safeguarding for example, and it usually moves the formation risk continuously for the production run devices needed.In addition particularly also have the function expansion of automation equipment, this is essential for the integrated of equipment management system for example.
This equipment management system is used to collect and handle the information about the peripherals state.The central controller of automation equipment is originally for the processing procedure value designs, and is not suitable for handling and provides this information of the peripherals that the interface simulation by a 0/4..20 milliampere is connected.This problem is present in equally and has the process control that analog information transmission is communicated by letter with higher level's HART, and the I/O assembly that at this moment is used to connect peripherals can not be used for HART communicates by letter, and field bus system does not provide acyclic service.It is unavailable at central controller to be used for the required information of equipment control in this process control, thus and the equipment management system that can not visit the higher level.
The publication of Fa.Pepperl+Fuchs " H.I.S.HART INTERFACESOLUTIONS " fascicle numbers 475215 discloses the equipment that the HART ability is arranged and has adopted so-called multiplexing scheme that asset management information is provided.They are set in the communication path, so that desired information is sent to central controller.Yet additional structure is a kind of significant intervention, and this almost always causes equipment to be connected.Usually this intervention to the communication path structure is undesirable because it interrelates with high file and test expense, perhaps owing to be used for along the required optional feature of communication path lay the space unavailable or its provide expense high.
Another shortcoming of multiplexing scheme is the undesirable association that often occurs between the equipment topological sum equipment control topology.Thereby make to have only individual signal to be used to provide device management information normally impracticable with a multiplexer, because the conversion of 8 or 16 common passages of I/O assembly is obeyed in the wiring of multiplexer.Also there is the I/O assembly that is used to connect peripherals in this shortcoming, and these peripherals can carry out HART communication, and field bus system is supported the aperiodicity service.
Be published in Computer ﹠amp; The file that the guide sensor 2005 of AUTOMATION is the 14th to 18 page " Das drahtlose Sensornetzwerk " discloses wireless and in case of necessity by a plurality of sensor node transmission sensor signals.Its shortcoming is that process values no longer provides as bus signals in other words with the analogue value.But still need cable conductor for supplying energy here.As for substitute with battery or sun power supplying energy, it is safeguarded pretty troublesome or depends on weather, and therefore can not be accepted by the operator of automation equipment.
The also known bus system that other is arranged, wherein light wave guide circuit or radiolink are used between two devices to carry out the signal transmission with connected mode one to one.The bus network that the assembly of distributed placement still connects by electric current in a conventional manner at the scene connects.
Therefore the objective of the invention is to provide a kind of communication system, one of them central station connects with a plurality of fieldbus and user, and not direct with them, electric current is coupled is connected.
According to the present invention, above-mentioned task is finished by the described device of claim 1.Dependent claims provides the embodiment that the present invention has advantage.
Starting point of the present invention is that an automation equipment has a plurality of external device (ED)s, and they and a center control device form and communicate to connect.Here measured value and diagnostic data are transferred to the center control device from external device (ED), and regulated value and parameter are sent to external device (ED) from the center control device.
Essence of the present invention is to be connected the transducer between the communication path, is given it but the external device (ED) of predetermined number disposes uniquely.This transducer is designed to and the external unit that disposes to it carries out radio communication.Communicating to connect between transducer and center fixture then is that lead connects.
Communication system according to the present invention is built into outside the communication network that the existing lead that is used for process control connects, and is that this has been avoided foregoing shortcoming to the replenishing of existing communication network.
The influence that the present invention makes this instructions begin to locate the fault of a described external device (ED) with having advantage is limited in this unit, thereby and has avoided other external device (ED) to be subjected to involving of this fault and damage.
In addition, by restriction to external device (ED), the communication network that makes the lead be used for process control connect is logically different with communication system of the present invention and can isolate mutually, thereby makes these two communication systems with in service mutual different characteristic be arranged in planning.But but the visit of device management information can be confined to the peripherals of predetermined number or predetermined kind.
What have advantage is, communication system of the present invention allows with different in logic bus systems peripherals to be carried out central authorities and visits, and these bus systems can be configured to different controllers.
The present invention connection space position of need not to add disperses to be installed near the peripherals because implement the required parts of guidance of the present invention in addition.
By communication system of the present invention, avoided influence, because the information that is transmitted on it is passed through on the central control unit next door to central control unit with having advantage.By this way, need not the expansion that equipment downtime just can be finished the automation equipment complexity.
The energy of the device on the wireless communications path is supplied with the communication network that connects by the lead that is used for process control and is carried out.What have advantage is, the energy supply that can not need the cable that adds and solar cell to be used for peripherals.
Parallel equipment management system also conducts interviews to process values, and this communication network that connects at the lead that is used for process control is redundant the realization when breaking down.
In addition, the quantity of expensive electric current isolation is limited to on the required minimum value of transmission course value.
By embodiment the present invention is described below.Unique accompanying drawing illustrates the theory structure of a communication system.
In first embodiment of the present invention, external device (ED) 31 to 3n is implemented as field apparatus.Here one preferred embodiment in selected external device (ED) 31 and 32 be configured to first process controller 71 as field apparatus, other external device (ED) 3n is configured to second process controller 72 that is independent of first process controller.Install 31 to the 3n field apparatuss for simulation in the diagram, their equipment lines 60 by routine are connected with 82 with 72 corresponding I/O assembly 81 to process controller 71 via a current return and configuration.Process controller 71 with 72 respectively communicating to connect of being connected of the lead by separately 41 be connected with 82 with I/O assembly 81 with 42.
The status data of external device (ED) 31 to 3n that is used for the various process control 71 and 72 of equipment control in center fixture 10 is collected and analyzes.The communication system that is used for equipment control and the communication system that is used for the CONTROL PROCESS flow process are irrespectively by superposition thereon.
In another embodiment of the present invention, the communication system that is used for equipment control can interconnect with the communication system that is used for the CONTROL PROCESS flow process.For this reason, process controller 71 and 72 and center fixture 90 be connected on the shared system bus 90.
In addition, this two-way communication also is used to the configuration and the parametrization of external device (ED) 31 to 3n.For this purpose, transducer 20 data that center fixture 10 is provided send to the corresponding external device (ED) of these data 31 to 3n.Externally install the processing of carrying out data in 31 to 3n in known manner then.
Structurally, each external device (ED) 31 to 3n disposes a wireless communication unit.In an embodiment of the invention, wireless communication unit is embedded in the current return of guiding communication external device (ED) 31 to 3n into as independent device.Here wireless communication unit current return feed thus.
In order to communicate between independent wireless communication unit and external device (ED) 31 to 3n, an alternating current is modulated onto on the DC current of power supply.For this reason, particularly an agreement that meets the HART standard is suitable for.What have advantage is that this embodiment is augmented equipment for existing automation equipment with equipment management device and is particularly suitable for.Here the influence to external device (ED) 31 to 3n keeps being confined to the part.
In an alternate embodiments of the present invention, wireless communication unit is implemented as complementary module.External device (ED) 31 to 3n is assembled a holding device that is used for optional complementary module.Wireless communication unit is placed in this holding device, and is powered by external device (ED) 31 to 3n.For example the indicating module of a part can be replaced by a communication module.What have advantage here is that the communication network that the lead of conventional equipment connecting line 60 connects is not affected.
In an alternate embodiments, I/ O assembly 81,82 is implemented as external device (ED) 31 to 3n.Here process values transmits between equipment and the I/ O assembly 81,82 at the scene by the analog current loop, and an AC signal is modulated onto on the current return, is used for transmission equipment management information.Particularly an agreement that meets the HART standard is suitable for to this.Change between alternating current transmission that lead connects and wireless transmission at device management information in the I/ O assembly 81,82, and connect 50 and transducer 20 and center fixture 10 switch equipment managing information by radio communication.
The incompatibility specific when successfully having overcome transmission equipment management information when communicating by letter between I/ O assembly 81,82 and process controller 71 and 72 to manufacture process by this embodiment.
In addition, when being connected on the fieldbus and using this embodiment during the communication of the enterprising line number word of bus at the scene, field apparatus also has advantage.
Reference numerals list
10 center fixtures
20 transducers
31 to 3n external device (ED)s
What 40,41,42 leads connected communicates to connect
50 radio communications connect
The equipment line of 60 routines
71,72 process controllers
81,82 I/O assemblies
90 system buss
Claims (4)
1. thereby be used for carrying out the communication system that exchanges data communicates between center fixture and external device (ED) in automation equipment, it is characterized in that, at center fixture and external device (ED) (10,31 to 3n) between communication path in insert a transducer (20), but being disposed uniquely, the external device (ED) of predetermined number (31 to 3n) gives this transducer, and described transducer is implemented as with center fixture (10) and carries out the communication (40) that lead is connected, and carries out radio communication (50) with external device (ED) (31 to 3n).
2. communication system as claimed in claim 1 is characterized in that, external device (ED) (31 to 3n) is implemented as field apparatus.
3. communication system as claimed in claim 2 is characterized in that, field apparatus can carry out parametrization by communicating to connect (40,50).
4. communication system as claimed in claim 1 is characterized in that, external unit (31 to 3n) is implemented as I/O assembly (81,82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421820.9A CN102970335B (en) | 2006-01-23 | 2007-01-23 | Communication system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006003008 | 2006-01-23 | ||
| DE102006003008.7 | 2006-01-23 | ||
| DE102007003196.5 | 2007-01-22 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210421820.9A Division CN102970335B (en) | 2006-01-23 | 2007-01-23 | Communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101371206A true CN101371206A (en) | 2009-02-18 |
Family
ID=40414014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800029915A Pending CN101371206A (en) | 2006-01-23 | 2007-01-23 | Wireless field bus management |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101371206A (en) |
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2007
- 2007-01-23 CN CNA2007800029915A patent/CN101371206A/en active Pending
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Application publication date: 20090218 |