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MTLW-103-09-L-D-020

来源:LM317 Electronics Components编辑:City Technology时间:2021-06-14 03:34:51

– Hard Real-Time: Control systems that have a requirement of cycle times for their applications of less than 10 ms and can tolerate no more than 100 microseconds of jitter.

STMicro and Telia — a network operator that offers broadband services — are promoting Zipper-DMT as an international standard. The two companies believe DMT modulation techniques will allow full interoperability with ADSL full rate and G.Lite connections. This compatibility will enable ADSL and VDSL to be served as a single mass market, the companies said.

SANTA CLARA, Calif.–Power semiconductor supplier IXYS Corp. here said it was reviewing a patent suit filed by International Rectifier Corp. for infringement of technology in MOSFET devices.

MTLW-103-09-L-D-020

Details about the lawsuit were not immediately available, but IXYS said it received notification from IR, based in El Segundo, Calif., which filed the complaint covering certain MOS field-effect transistor product sold in the U.S. markets.

We are in the process of reviewing the allegations made by IR, and will respond appropriately to IR once we have completed the review,” promised Nathan Zommer, president and CEO of IXYS.

Many people regard the Microsoft Windows CE operating system as a great platform for mobile, handheld, set-top and other PDA and consumer electronics-based devices. And many of the qualities that make it ideal for these products-such as its small footprint, connectivity with existing IT infrastructures and its ability to support fast, flexible and reliable designs-also make it well suited for very different applications in the industrial automation market.

MTLW-103-09-L-D-020

But mobile and handheld PCs and PDAs don't need to meet what is perhaps the No. 1 requirement in the industrial automation market: the ability to support real-time response rates to the time-critical events of embedded applications such as robotic devices, PLC controllers, CNC machines, telecom switching equipment and medical monitoring equipment. Such applications must deliver a deterministic, bounded response within specified time parameters in real-time, or face expensive and potentially dangerous results.

Industrial automation designers must ask themselves if Windows CE provides the type of support in which they can have confidence-support that's powerful, reliable and easy to access-for real-time performance? As an independent developer whose company has taken a lead in working with Microsoft to develop and test the real-time performance of Windows CE 3.0, the latest version of the operating system, I believe the answer is a resounding yes.”

MTLW-103-09-L-D-020

That support is creating an entirely new dynamic in the industrial automation industry, because the far lower cost of Windows CE devices, compared to proprietary systems or even to Windows NT-based devices, creates entirely new possibilities. Companies such as General Motors and Phillip Morris can consider putting Windows CE devices where they couldn't previously, and at no less than one quarter of the price.

For instance, a single commodity-priced Windows CE device can have the flexibility to perform both visualization and control, eliminating the need for the separation of display and control devices. These new devices can monitor systems and provide feedback exactly where it's needed anywhere in the plant. For example, if a production problem occurs in a remote plant area, a supervisor with a handheld wireless Windows CE device can get feedback on the spot and make a real-time decision about moving production to other line areas. This creates new market opportunities for OEMs and allows manufacturing and industrial automation customers to heighten efficiency by optimizing their machines based on immediate information.

Using OPC on DCOM, IA applications developed by many different vendors can communicate with one another across a plant-wide network. That technique is used extensively for the interconnection of control system software components within IA.

Recently, the foundation has embraced progressive technologies such as the Extensible Markup Language (XML) to provide interoperability across virtually any platform. An OPC standard for clients and servers that will use XML is currently in the works.

Java RMI in works

OPC solutions can be developed for operating systems other than Windows through the use of middleware that provides DCOM capabilities on those operating systems. Middleware is currently available for Unix, Linux and VXWorks. Because available middleware simply provides an interface to Microsoft COM technology, previously mentioned limitations of DCOM are still inherent in those solutions.

The Java Remote Method Invocation (RMI) facility provides similar functionality to DCOM. Java's RMI may be run on a variety of embedded system platforms. In fact, it may be run on any OS that supports a Java virtual machine. In IA, however, there has been little effort to define a standard based on RMI. At present, OPC on Ethernet/IP is the clear choice for device and software interoperability.

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