Motion control is one of the most demanding applications within the typical automation and control system. For years it was largely the province of legacy fieldbuses such as CANopen, as well as conventional peripheral component interconnect cards. These technologies had their share of limitations (for example, relatively meager bandwidth) but were generally reliable and inexpensive to implement. This article from Analog Devices examines how the move toward industrial Ethernet protocols – including PROFINET®, as well as EtherNet/IP®, EtherCat®, and many others – began in earnest years ago, as standard office Ethernet was modified to address its biggest shortcomings, most notably the lack of determinism.
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