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Safety networks achieve better machine-control performance
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Автор:  san [ 26 серпня 2014, 01:26 ]
Тема повідомлення:  Safety networks achieve better machine-control performance

Safety networks achieve better machine-control performance
http://e-ditionsbyfry.com/Olive/ODE/CTL ... w=document
Designing and implementing traditional hardwired safety solutions is complex, time consuming, and allows many errors. Once a system has been wired up, limited diagnostics add significant burden as well.Today, users have several choices of products and safety networks for industrial communications to address different needs.
Safety without redundant wires?
Engineers who are used to running redundant wires often ask how it is possible to build safe machines without them. The answer is relatively simple: while safety networks do not use redundant wires, they accomplish redundancy by different means that are typically smarter and arguably, even safer.
Even though the details of how this is done vary from network to network, they usually employ procedures like message duplication, extended checksums, and pre-negotiated message contents.


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