Re: PROFIBUS link-type

[Guy Harris <guy () alum mit edu>]

On Jan 1, 2014, at 5:29 AM, Simon Berg <ksb () fluffware se> wrote:

> I've written some capturing tools and a basic Wireshark dissector for
> the PROFIBUS protocol. Since it's delivered directly over a RS485-link,
> it needs a separate link-type. Since I haven't been able to find a
> suitable type among the existing ones, I'd like to request one being
> allocated.
>
> The format is the full packets as described in IEC 61158 (61158-4-3 more
> precisely).

So "full" presumably means that:

        the first octet of a packet is the start delimiter for the packet (the start delimiter appears not to have a 
single standard value for all packets, so it appears that it can't be elided without loss of information);

        it also includes the end delimiter for asynchronous transmission, and all the octets between the delimiters, 
including the FCS octet, exactly as they appear on the wire.

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