CAN bus line is in can reframe the applied research in production unit

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Summary: ? Bus line of AN of core exacting Shu is in can reframe the application in making unit control system, introduced the soft hardware design of interface of CAN bus line. Production system how fast, nimble, flexible the demand that the ground answers the market, make one of crucial technologies that enhance company competition ability, the production system that uses fixed production to organize means cannot recombine production resource dynamicly according to machining the change of the task, affected the nimble sex that the enterprise answers to the market. Brisk production demand makes resource the basis produces the change of the task and recombine quickly, can reframe production system RMS(Reconfigurable Manufacturing System) puts forward to achieve this one goal just about, its architecture is open, it is modular, but put sb in a very important position and the system that can expand, can undertake be insertinged accordingly unplugging type recombines according to diverse demand. The rock-bottom treatment facilities of different type is in can reframe Plug and Play of the implementation in production system, also can realize what resource makes on the net to recombine reach work in coordination. Can reframe production system should interrelate different type equipment combination, all sorts of message that run spot facility are transmitted to control room, with operation terminal, superstratum control government network is linked together, the operation that realizes pair of production unit thereby plans and attemper control, only such ability are in what nimble production unit comes true on real significance to reframe. Bus line is the bus line of a kind of data that in recent years rapid development rises, the intelligence that it basically solves industrial spot turns instrument appearance, controller, carry out implement wait for problem of communication of the number between equipment and these the information between spot control equipment and advanced control system hands an issue. Advantage of combinative spot bus line, can reframe the characteristic of production system, put forward to be in can reframe bus line of spot of the application in production system, automation of implementation shop ground floor and information are compositive the technical need with getting used to vicissitude of the market quickly. 1 CAN bus line and bus line of its characteristic spot and control system and spot appearance couplet use compositive spot bus line to control a system (PCS) , it will be replaced dispersive model control system (network of communication of bus line of DCS) implementation spot and control system are compositive. At present more current spot bus line has FF, Lonworks, Profibus, CC-Ling, HART, CAN to wait. Control what CAN(Controller Area Net) of sth resembling a net of local area network suits equipment of industrial spot automation particularly to interrelate among them, already by accepted one of spot bus line to have an outlook most. CAN bus line is German rich world (Bosch) company is in on the century is agreement of a kind of when the data between the numerous control in solving contemporary car and test instrument is exchanged and raise development serial communication at the beginning of 80 time, it is a kind many advocate bus line, communication medium can be double skeining thread, coaxial cable or optical fiber, communication rate can amount to 1Mbps. The biggest characteristic of CAN agreement is to communication data piece has code, can make consequently the node inside the network number is in theoretic unlimited, the node that still can make differ receives same data at the same time, this are in can reframe in production unit very useful. Data end length is spent it is 8 byte at most, can satisfy the general requirement that status of command, job and test data dominate in industrial domain normally, in the meantime, 8 byte won't take up bus line time grows too, assured the real time sex of communication thereby. Does it have: of the following and main characteristic? Yu Di Kun uses up calumniate of  of enemy abundant of ⑽ Lian Ping to entangle bank heats up child of remnant of dream of Le of ń  fierce mow to censure ǖ of twinkling of order of shaddock  mail mu lament Piao divides <  of Piao of  Jin child is low the Zu that show  come on ⑺ of Qian of Dang abundant child pushs brag Cong carbonyl: CAN bus line, ranking PC, can reframe production equipment. Its construction of system. Network develop attacks the structure uses bus line formula, each can reframe equipment is hanged receive the local area network that forms much controller on bus line. Used the small processing system of interface of CAN bus line, pass interface, ranking PC can be linked together with CAN net. Small processing system includes to data is collected and machine a process to control two shares, data is collected by hang receive the data on CAN bus line to collect unit to finish, treatment process control moves on the PC, capture the treatment information of each node equipment, undertake to its newer, automatic quality and treatment process are diagnosed detecting. 3 can reframe the CAN of design of interface of CAN bus line that makes unit control system is comfortable match cartoon to cross PC bus line to be linked together PC and CAN net, the task is the CAN network node that conveys the data inside the PC and command to appoint, transmit the data of each network node the PC to be handled further in order to make at the same time, comfortable the microprocessor that matchs card to go up (the communication burden that 80C51) reduced a PC greatly, can run the communication task with complex user. Interface is comfortable match card to be comprised by the following part: 80C51 small controller, 82C200CAN controller, 82C250CAN is sent and receive implement, double mouth RAM. Small controller 80C51 basically assumes the harmonious job of node and PC data communication, the data of implementation of double mouth RAN of 2K is shared and both sides is transmitted, appliance of control of 82C200 bus line has many advocate lien of visit of structure, bus line, reach function of hardware filter wave into group and broadcast message function, CAN is sent and receive implement the differential that 82C250 can provide bus line is sent and receive ability. Communication driver basically is port is offerred between superstratum application process and bus line driver. Main function distributes a share: The network manages and apply an interface. Its structure. Because 82C200 realized the transmission layer of CAN agreement provision to concern a function, include arbitration of frame control, bus line, message to filter, wrong examination, make mistake call the police and breakdown segregation, this simplified greatly the processing of communication driver, want the part related processing and data only, and the physics that need not consider specific data to transmit comes true. Stem from the consideration of transplanting sex, language of major code C will come true, use Franklin C51 to compile implement. Very expensive to requirement of real time sex system, can be handled directly with collection. To the real time operating system of much task, the much of these code is OK still of put sb in a very important position. Below the structure of course of brief introduction correspondence. Network management includes initialization, interrupt service exemple Cheng. Initialization (the set that CANInit) basically is pair of 82C200 job mode, include to interrupt, systematic clock is mixed a time, message filters etc, involve the register of a few 82C200. Next initialization shares variable. Final setting is interrupted vector and interrupt first step, hang receive interrupt service exemple Cheng. Interrupt exemple Cheng (CANIsr) includes to receive, send, make mistake, overweighted 4 module, the concerned processing of message of the CAN that finish. Applied layer interface basically provides the function that send and receives an information to superstratum. Send and accept cent to take amortize formation with two kinds of way that do not lead amortize, use amortize can make the program is read with asynchronous write, do not use amortize to will make the program produces block when the network cannot be used, can use till the network till, the resource that the advantage of this kind of means depends on pair of systems takes up less. When applying actually, can choose according to particular case. 4 conclusion are based on CAN bus line can reframe production unit controls a system to have open sex, each other to operate gender, interchangeability, but compositive sex, the function such as management of information of control of travel of solid actual fortune, system and communication management, provide technical support to come true to be made adroitly. The multiplex that uses means of serial bus line can reduce wiring complex degree, network node amount but at any time increase and decrease, can reframe quickly according to needing actually to undertake to making resource, get used to the need that creates adroitly. CNC Milling CNC Machining