Re: What to use? EtherCAT or Ethernet Powerlink with CANopen protocol

Albert Saenz wrote:
> Thanks Armin for your clarification (I realize that PLCs have special 
> "equations" to obtain something that can be seen as deterministic 
> response) and also suggestion.
> I don't doubt of filed buses "pseudo-proprietary" like it seems the 
> Varan-bus. The problem is "universality", that means that many 
> manufacturer implement it!

The VARAN bus is open specified and is controlled by the VARAN user 
group (VNO) and isn't controlled by a single vendor.
The implemenation is FPGA based and the VHDL code is offered for the 
member of the VNO.

None of the members are bound to a vendor specific hardware or firmware 
... this isn't for instance the case with the so called
"universal" field bus systems PROFIBUS, PROFINET or EtherCAT -> you have 
to use vendor specific ASICS/controllers.

The VARAN bus is because of its flexible FPGA implemenation not bound to 
the transmission speed of 100Mbits/s.

Best Regards

--Armin


> Kind regards,
> Albert
>
> ------------------------------------------------------------------------
> *De:* [email protected] 
> [mailto:[email protected]] *En nombre de 
> *Steinhoff
> *Enviado el:* sábado, 15 de diciembre de 2012 16:10
> *CC:* Albert Saenz; [email protected]
> *Asunto:* Re: [CANLIST] What to use? EtherCAT or Ethernet Powerlink 
> with CANopen protocol
>
> Albert Saenz wrote:
>> Hi all,
>> I want to thanks everybodybut, I'm sorry, I think my question was not
>> clearly introduce.
>> 1.    Despite any PLC can NOT be deterministic because it depends on the
>> "branch" it executes the program (Soft Real Time).
>
> It dependes on the type of the "PLC" ... a can be SoftPLC be 
> deterministic if it
> works eventoriented on top of an RTOS.
>
> For instance: http://dachs.net/DACHSview++_E_fleyer.pdf
> [ clip]
> >Anyhow, our query was to demand your opinions when we need to control more
> >axis and all the I/Os (digital and analog) with a single field bus channel?
> >That is because we are thinking in EtherCat or Powerlink (despite that I
> >sincerely believe that Ethernet hardware will win to any other solution in
> >the CNC market).
>
> You should also have a look to the VARAN bus:http://www.varan-bus.net/index_en.htm
>
> Best Regards
> --Armin
>
> > Hope I have clarify properly
> >Best,
> >Albert Saenz
> >Skype: my_voip
>
>   
>
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