Technology of spot bus line puts the issue that be in in application

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  • source:BACHTEL CNC Machining
Spot bus line is the bus line of communication of word of two-way total number that receives spot facility repeatedly from control room, understand simply even if communication bus line is outspread all the time to spot equipment. It is model of an open interconnection, can be united in wedlock with aether net, realize telemonitoring, control through Internet, debug, diagnose etc. Spot bus line is the computer, communication, confluence that controls a technology, the advantage originates 3 big characteristics: It is digitlization, imply a move in chess or a movement in wushu is defeated as it is said more convenience, information transmits a quantity to increase, those who provide data can share a gender; 2 it is a standard unified and open, benefit at sharing, clear away road for different network interconnection, offer each other to operate a gender; 3 it is control disperses, simplify network architecture, make interconnection more convenience. Signal transmits the basic characteristic that digitlization is all spot bus line, it makes systematic precision rises; The information of spot equipment increases a few times, can use at be being diagnosed oneself, the system is debugged and manage, enhance systematic effectiveness; Same cable is hanged receive facility of much stage spot, can save cable 90 ％ of 70 ％ ～ and construction quantity. But the advantage that economic cable just is surface layer of technology of spot bus line, because DCS ／ PLC is long-range,I ／ O also can achieve similar result, and obtaining substantial information from spot equipment just is the substaintial advantage with particular technology of spot bus line. The standard is unified and open it is the characteristic with all spot indispensible bus line, also be it and a lot of so " have only " one of crucial distinction of communication bus line. The substaintial advantage that it brings to the user is the monopoly that broke individual firm, give a technology with powerful supportive group, stimulative fairness competes, stimulative technology progresses. DCS accomplishs operation station above to open only, control layer cannot be open, and FCS accomplishs a standard-sized sheet of systematic from the top down to put. The rate that diverse bus line opens and difficulty are distinguished somewhat, the difficulty that bus line of simple O of I ／ opens is inferior, and the operation of open each other that controls used systematic bus line is very difficult. Control is the outstanding characteristic that spot bus line has dispersedly thoroughly. The substantial advantage that it brings to the user is the function that will finish DC S controller dispersedly by the spot equipment of high intelligence, change infirmly even leave out the administrative levels that centers controller, can reduce facility cost, make control risk thoroughly dispersive, raise sex of systematic pilot autonomy and dependability. Of course, spot bus line also has the situation that produces its advantage hard. Inside very long period, include DCS ／ PLC inside a lot of control systems and active standard metropolis and spot bus line are concomitant, after this and DCS appear, be to the situation likeness that a lot of original control equipment still exist today. At present technology of spot bus line already obtained very great progress in the application of our country, but also put in a few problems, restricted its to popularize. The field uses in the project, project investment is larger. Although all sorts of spot bus line regard cost saving as oneself main good point, but the investment of bus line of the spot in applying actually controls a system to want than the tradition big. The systematic scope that is try out is too little; The 2 systems that are try out do not disperse or use original wiring transform a project, because this cannot fill minute of play,spot bus line saves the advantage of cable. Next, debug and move it is more difficult to safeguard. The applied skill that because show level adroitness,masters spot bus line and the person with ability that develop a technology are little, the enterprise encounters difficulty via regular meeting when debug and moving. Accordingly, the enterprise is selecting a system when compositive business, should choose technical force stronger, have the unit of experience quite. Moreover, with conventional control systematic photograph compares an advantage not apparent. The system of spot bus line that changes spot appearance to be a foundation with intelligence and traditional system photograph are compared, its advantage depends on commanding a respect not only, more depending on that diagnose oneself, from corrective wait to run a side automatically. But, the systematic great majority that at present home uses is too small, did not mix administrative automation diagnose a function remotely to bring into a system, because this cannot develop system of spot bus line,reduce run the dominant position that maintains charge. In technical respect, when bus line is cut off, the system produces unpredictable consequence likely, the user hopes at this moment systematic efficiency can be reduced, but cannot break down, this are current a lot of spot bus line are unwarrantable; Existing explosion proof regulation limitted the amount that equipment hangs on bus line length and bus line, also restricted spot bus line to save the play of cable advantage; Systematic configuration parameter is beyond the mark and complex, master not easily. But configuration parameter set gets stand or fall, very big to systematic performance influence. In application, the sex of open, interconnection of spot bus line and sex of each other operation decided to it the inevitable safe question that all comes to. Exterior net is an automation system that implements by spot bus line, be united in wedlock together cheek by jowl with the Intranet of the enterprise, existence wears as common as In Ternet applying a variety of identical menace, include eavesdrop, purloin to get control data, illegally authority, undertake destructive, block up communication. Want to solve these problems, the uses in the light of spot bus line security that must build to fit a business is politic. In Intranet interior, people loosens vigilance easily. Because spot bus line applies at more chemical industry, electric in control of automation of the eaves that reach a floor, these circumstances ask the system moves continuously, the charge time that because this spot bus line is likely,gets and common application look are more than growing. Be based on safe circumstance, can consider to design each subsystem relatively independently, make one stature system is destroyed won't affect whole system; Use communication controller to connect bus line and aether net, improve the function of communication controller, the security that can have fixed rate is on guard action, include to reject illegal visit, keep apart bus line and aether net when danger etc; Undertake reasonable redundant design, in order to increase systematic stability. The place on put together is narrated, spot bus line does not appear to solve a tradition to control the problem with insoluble system, its main good point is more agile, opener, offerred a possibility to use new-style system to maintain means and business management pattern. But the situation that chooses a condition to heading with the price, systematic dimensions the circumstance that object of lesser, control distributings to be centered quite, and the situation that be diagnosed without patulous equipment intelligence and manages a requirement, spot bus line is not optimal choice certainly. CNC Milling CNC Machining