Burgeoning but process designing automata implement PAC feature and application

This controller combined the advantage of the processor of PC, RAM and software, and the dependability with inherent PLC, consistence and distributinging character. PAC is used show some to commercialize a technology (COTS) , special agree with industrialized environment, it is had but retractility, be safeguarded easily and have malfunction inferiorly the character such as time. The PAC platform that grows quickly about the platform of PAC is to be based on PXI. The Ouluoka with the circuit character that combined PCI bus line as a result of PXI and solid Compact PCI is mechanical structure, this kind of structure was used successfully in industrial environment already a lot of year, current NI, chroma, the supplier such as LeCroy and JTAG can be offerred now 1, a variety of 000 distinctive I/O module, include imitate I/O, number I/O, vision, motion and high accuracy data to collect. Typical can offer the following platform of hardware of 4 kinds of PAC. (1) PXl made improvement to industrialized PC, have real time OS, of the standard medicinal powder hot, do not rotate optionally solid state hard disk and inside the synchronism between the module of buy. The air that PXl standard asks all box can insert groove to offer 25W for every module sheds refrigeration, using high power relay even so, when high speed PXl or CompactPCI get stuck, also won't make working system overheat perhaps shortens life. PXl also offerred can strict synchronism the function of each module, because this engineer can think high speed controls application to devise campaign, vision and I/O system, these application include a product to pack handle with semiconductor device. (2) the part of level of Compact FieldPoint use industry will resist strong impact and vibration, limits of its job temperature is - 40 ℃ arrive 70 ℃ . It also is used conduct type refrigeration to replace rotate fan, as a result of do not use mobile part and raised dependability. Because have the floating-point processor of OS of moving real time, compact FieldPoint system has PC function, the CompactFlash drive that is used at recording data and the aether net opening that are used at communication. (3) the solid controller that Compact Vision system is for machine vision special design. It is used, interface of IEEE standard 1394FireWire, 16 camera communication can be counteracted in visual application. Compact Vision system also is used inactive component and conduct type refrigeration, accordingly you can secure the system around the machine. It offers 29 inside the digital I/O access of buy, these access but by LabVlEWRT or of use LabVlEWFPGA embedded FPGA will be controlled directly. Nextpage (4) CompactRIO is new-style what can repeat a setting is embedded system, it is based on LabVlEWFPGA and LabVlEW. Real time technology.

CompactRIO system collects appliance to 1 million 3 FPGA chip will control modular number and imitate I/O. These FPGA chip can move built-in the code in chip, the rate that its number circulates is as high as MHz, the rate that imitate circulates is 150kHz. FPGA can send message the floating-point processor that returns moving LabVlEWRT corresponds with undertaking advanced computation and data logging are mixed. Because have a metal,crust is mixed conduct type refrigeration, this controller suits to be used at harsh environment very much. A few kinds of features that graphic signal PAC defines function of feature of graph 2 PAC and function (2) seeing a picture. Offer general development platform and onefold database, with it is system of much territory automation completely design and compositive general development platform; A light control engine, the function that can realize much territory includes: Logistic control, process control, sport control and man-machine interface, to unite platform; The requirement that allows an user to be carried out according to the system carries on same platform the applied process of many different functions, well basis controls design demand of the system, the allocation of systematic natural resources undertakes between each program; Use open modular hardware framework to be combined in order to realize the freedom of different function with collocation, reduce a system to upgrade brought expense; Support standard of bus line of spot of IEC 611 58, can realize the height that is based on a bus line the factory automation environment of dispersive sex; Support in fact standard of industrial aether net, can the EMS with the factory, ERP system easily compositive; Wait to network agreement, language, use established fact standard to make sure the data of much vendor network is exchanged. PAC is executable more high-level job is real time processing of oscillatory analysis, image, athletic control and CAN; Carry out self-adjusting PID control, the PID that may move gain is controlled. Faintness is logistic; Use inside buy Web server, FTP server and E-mail function have news report. PAC application citing combines NI PXI and graphical software LabVIEW RT(with PAC real time) monitoring of high accuracy of implementation steel bar and system of tall reliable closed-loop control - automation processing devises plan. The steel bar that ○ project design needs production of cold-rolled steel factory to give unified ply as a result of metallic industry system (the formal) that coils with steel, the steel bar norms that for this these rolling mill need to be produced by opposite undertakes the Gao Ke of monitoring relies on closed-loop control system.

The technology of system of design task ○ that this is this PAC application asks this system can undertake high accuracy is monitored and control and answer with faster noise time (than traditional PLC) ; Can assure every week 7 days, everyday 24 hours of successive expensive reliable works, and utmost ground reduces artificial operation. Because NI is based on,the high accuracy of norms of steel bar of · of program of ○ system design is monitored PXI and real time PAC platform suits to be used at high accuracy to monitor very much, the graphical soft LabVlEW RT(that reason can use NI firm real time) with PXI hardware development goes be based on NI but process designing automata implement (the norms of PAC) is monitored and control a system. With PAC control system monitors steel in real time piece ply answer with fast and affirmatory noise time controls metric apparatus. The working process PAC that · narrates this PAC to control a system first controls a system to have two roll, one is fixed, another portable, they and crock of fluid calm sb's anger are linked together. Portable roller is opposite according to inputting signal steel piece pressurization in order to assure steel piece have appropriate ply. Through be being compared to all sorts of platform that can use complex applying at this kind, chose NI PAC platform and graphical software LabVlEW RT(real time) reach PXl hardware. Use the PAC product of N I, shortened not only development time, the client that also is us reduced cost. The signal of · system is collected measure use ply respectively metric appearance and displacement sensor should control a system to use ply metric appearance will measure steel piece ply, namely, it measures span to locate the deviation of the dot forms imitate signal to input PXI hardware with the precision of micron class. Form imitate voltage signal according to the pressure of hydraulic pressure air cylinder next. The position that sensor of Nextpage 　 displacement determined hydraulic pressure air cylinder offers as metric as the metal gift to controller (or between two roller span) associated number inputs signal. Rotate coder (TRD-K) secures what turning to rise fall on roller, it shows the rate that steel bar is given by make friends, its signal sees the graph is shown 3 times. Receive data through using all sorts of sensor, move at the LabVlEW RT of PXI controller to make the output signal that answer and creates pressure of change hydraulic pressure to the input, control the norms of steel bar thereby. No matter be ply,metric appearance and displacement sensor all can use fiber-optic sensor to carry out. Graph 3 with rotate coder determines the speed sketch map that steel bar is given by make friends pursues 4 use at steel bar for PAC (or turn capable person) the system of tall reliable closed-loop control that norms has monitoring - the design program block diagram that automation handles.

Saw the signal such as sensor of baric, displacement, ply and coder chooses to pass in this design program from inside the graph feeling collect measure LabVlEW RT(of software of part, graph real time) , PXl/CompactPCI is muti_function high accuracy collects card, but process designing automata implement (PAC) . The implementation that graph 4 PAC uses at monitoring of steel bar norms and system of closed-loop control of tall reliable automation to design plan plan to control a system reliably - muti_function high accuracy is collected, tally closes and of digital I/O module use use moving LabVlEW RT(real time) PXI control will implement control system. This PXI system uses 3 kinds of different module (see the graph shows) 4 times. We use NI PXI-6070 muti_function high accuracy collects card to the imitate that finish is inputted or output ply and pressure data. In addition, with NI PXI-6608 tally / timer card measures the signal of coder and determine roller rate (signal and graph 3 identical) ; A powerful person of servo of block control of model of output of imitate of use NI PXI-6711 will change the position of hydraulic pressure air cylinder, control the norms of steel bar or ply thereby.

Use module of I/O of figure of NI PXI-6527 industry again (contain 24 segregation to keep apart input line and relay of 24 segregation solid state to output a line solely) realize control of type of pushbutton of a stock to pull, will solve real time system and lead plane to produce join to interrupt this one difficult problem of such contingency. This used PXI and LabVIEW development to give reliable control system namely. Answer time shorten greatly compare with traditional instrument and PLC photograph, we used NI PAC platform to increase flexibility, reduced answer time and improved product quality. Well-known the typical system to be based on PLC, its rate that controls a loop is 100 to 500ms, and use the control system that is based on PXI, we reduce the cycle time of this system to 10ms, improved the quality that we output thereby. Also use PXI backboard to undertake synchronism to measuring. Finally, because used onefold development environment and agile hardware, we answer systematic noise time is reduced for 1/6, reduced the integrated cost with possessory project thereby. The monitoring of steel bar high accuracy that those who need a specification is this PAC application and Gao Ke rely on closed-loop control system, same also applicably at board industry (or construction industry) . The PC function that conclusion can increase place to need for you as a result of PAC in order to be used at advanced control, modal analysis or connection business database, and the dependability that maintained PLC at the same time. If you just do not need compositive number I/O and athletic control, perhaps need faster computer to handle the sentence of ability, PAC is likely dispute often chooses well. For this, current engineer is controlled besides PLC outside, its PAC can yet be regarded as is a kind of optimal choice, it occupational automation domain. And PAC concept will be in mix now prospective factory from result the effect with the main play in changing. CNC Milling CNC Machining