[etherlab-users] domain process data persistence

[Thomas Paoloni]

On 09/10/2012 13:27, Florian Pose wrote:
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> Am 08.10.2012 16:42, schrieb Thomas Bitsky, Jr.:
>> What you're proposing would be a mistake. The value coming back is
>> the value of that object in the field. You send out a value, the
>> slave reads it, then puts in the value that is actually there. If
>> it just took your value and never did anything with it, you'd be
>> blind to what is going on out in the field. The fieldbus isn't your
>> personal memory buffer; it's feedback of what is going on in the
>> real world.
> That's not true. A slave will *never* change RxPDO-only data in the
> frame. For pure RxPDOs (master ->  slave) you will receive exactly the
> data you were sending.
>
This is exactly what I mean.
Data set to 1 comes back to 0 if I stop "forcing" it to 1 state.
None of the fieldbus I've played with have never behaved in this way
So if I stop writing I get back different data respect what I wrote.
Even if I've yet workarounded this buffering my output area I still 
consider this a sort of mistake.