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by camtarn 426 days ago
Similarly, PROFINET, the confusingly named EtherNet/IP (IP here stands for Industrial Protocol not Internet Protocol), POWERLINK, and others - all based on Ethernet but with a custom protocol layer replacing IP. "We need something that is high speed but also supports rapid deterministic communication" is pretty much a solved problem in the industrial space.

I wonder what Tesla's game is here: is it really just reinventing the wheel, or are they perhaps using higher speed Ethernet as industrial Ethernet tends to still be limited to 100Mbit? Or perhaps it's tightly linked with the proposal to communicate over 48V lines?
1 comments
eqvinox 426 days ago
Industrial Ethernet uses 100Mb speeds because (and when) those are sufficient for their use cases. There is no technical limitation there. 1000base-T1 (and even 2.5, 5 & 10G SPE¹) show where this is going.

¹ Single Pair Ethernet

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camtarn 426 days ago
Huh, I didn't know single pair ethernet went up that fast - neat! We're still living in the 100Mbit world at my company - and, yeah, it's fast enough for pretty much everything we need.
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