【正文】 代碼直接在芯片上運行，所以工程師們能快速開發(fā)采用定制的通信協(xié)議或高速循環(huán)的程序：數(shù)字控制循環(huán)速度可高達(dá) 1 MHz，模擬控制循環(huán)的速度可為 200kHz。 ? 處理能力： 在某些應(yīng)用中，您需要有專門的控制算法、高級的信號處理或數(shù)據(jù)記錄。 NI PAC系統(tǒng) NI提供五種基于 LabVIEW的 PAC平臺。 PXI能提供最為廣泛的 I/O，包括有 1000 V的隔離式模擬輸入，高容量數(shù)字 I/O，用于機(jī)器視覺的模擬 /數(shù)字幀抓取器，聯(lián)合多軸運動模塊。其中 I/O模塊能直接連接熱電偶、 RTD、應(yīng)力計、 420 mA傳感器、 530 V的直流信號以及 0250 V的交流信號。 Compact Vision System整合了高性能 Intel 處理器、 FPGA，數(shù)字 I/O和三個1394端口。 CompactRIO是基于 FPGA的可重復(fù)配置控制和采集系統(tǒng)，它是為需要高度定制和高速控制的應(yīng)用而設(shè)計的。CompactRIO 平臺非常適合如機(jī)器控制這樣的復(fù)雜和高速應(yīng) 用，并且，對于那些通常需要開發(fā)專門的硬件的應(yīng)用，結(jié)合了 FPGA的這種系統(tǒng)也是非常好的選擇。 LabVIEW RT可被加載到絕大多數(shù)標(biāo)準(zhǔn)的工業(yè) PC上，從而能提供用于工業(yè)測量和控 制的低成本平臺。 High speed I/O main line, like PCI and ether。XML and SQL inquiry language. Can with enterprise39。s connecting can pass an ether work transmission data can also read and write the I/O out of a few mileses which delivers through the work by reading and write native I/ the software connects very and in brief, you can build up and write the application procedure of the Compact FieldPoint quickly, but again don39。s PXI and the CompactPCI mold PXI can provide the most extensive I/O, including an insulation type of have the 1000 Vs emulation an importation, high capacity numerical I/O, used for the emulation of machine sense of vision/the numerical grab at a machine, uniting many stalk sport a mold heads of PXI mold piece all install to have convenient electric cable to link of PXI platform provides an overall diagraph mold a piece, and includes CAN, DeviceNET, RS232, RS485, the extensive conjunction of Modbus and Foundation Fieldbus. The product line of Compact FieldPoint39。 software development kit. Moreover PC also can provide the inparable flexibility, highly effective software as well as senior low cost hardware. However, PC is not extremely suitablly uses in controlling the application. Although many engineers in integrated senior function time uses PC, these functions including simulation control and simulation, connection database, work function nf as well as with third party equipment correspondence, but PLC still was at the dominant position in the control domain. Is standard PC is not but designs based on the PC control main question for the strict industry environment. PC mainly faces three major problems: Stability: The usual PC general operating system cannot provide uses in controlling the enough stability. The installment can force the processing system collapse based on the PC control equipment and not expect to again opens. Reliability: Because PC has the magic hard disk and the non reliable part which revolves, like the power source, this makes it to be easier to appear the breakdown. Not familiar programming environment: The factory operator needs to have when maintains and fixes the breakdown restores the system the ability. The use trapezoidal logic, they may manual force the coil to restore to the perfect condition, and can fast patch the code which affects by is fast restored the system. However, the PC system needs the operator to study the new higher paraffin the tool. Although certain engineers use have the firm hardware and the specially operating system specialpurpose industry puter, but because Engineer PC reliable aspect question overwhelming majority avoids in the control using PC. In addition, uses in each kind of automated duty equipment in PC, like I/O, correspondence, or movement possible need different development environment. Therefore these must develop 20% application engineers either use PLC to be unable with ease to realize the function which the system needs, either uses both contains PLC and to contain PC the mix system, they use PLC to carry out the code control section, realizes the higher paraffin function with PC. Thus the present many factories workshops use the system which PLC and PC unifies, in use system PC carries on the data record, the connection bar code scanner, inserts the information in the database as well as issues the data to the on. Uses this way establishment system the main question is this system with difficulty constructs frequently, fixes the breakdown and the maintenance. System engineer must unify frequently es from many merchants software and hardware work to puzzle, this is because these equipment are not but design for can the joint operation. Constructs a better controller Because does not have suitable PC or the PLC solution, these need development plex application engineer on develops the new product with the control merchant close cooperation. They need the new product to be able to unify PC the senior software function and the PLC reliability. These important users were PLC and have provided the product development instruction based on the PC control pany. Realizes the software function not only to need to have the senior the software, moreover the controller hardware function also needs to have the enhancement. Because in the world scope is dropping to the PC part demand, therefore many semiconductors merchants start for the industrial application redesign their product. At present controls the domain the merchant to start in the industry control product to use the industrialization floating point processor, DRAM, solid state memory like Compact Flash as well as the fast Ether chip. This enables the merchant to use based on the PC control system flexibility and the usability develops a more formidable software, moreover this PC control system also may move the realtime operating system by to guarantee the reliability. This kind of new controller is the solution 20% the application question but designs, it unified PLC and the PC two merits. The ARC industry analyst is called this kind of equipment the programmable automated controller, namely PAC. The programmable logical controller world looks at in generally the research in ARC, they have produced the PAC five principal characteristics. These contr