Re: [MAT-devel] Modbus Manual page

[Curt W. <wid...@ec...>]

I must admit total ignorance of DI, C, IR and HR as well,
althought I might suspect HR is holding register which
would send me towards the Modicon Docs, if I had any.

I suppose it depends on which way you're coming at the problem.
As a Modicon user or as a MAT user :^)

We should go the way that's most obvious to the least informed.
IMHO

I suggest we all look at esr's latest ravings as well. He has a
strong point, especially for our audience.

Regards



Mario de Sousa wrote:
> On Wed, 2004-03-03 at 11:02, Jiri Baum wrote:
> 
>>Mario de Sousa:
>>
>>> BTW, I wanted to update the modbus module manual page, but I don't
>>>really know much html. Maybe you could do it for me?
>>
>>Done.
>>
>>
>>>  The way I said things makes it all sound very confusing, but it really
>>>is simple. Maybe you can find better wording for it all? Or somebody
>>>else would like to give it a go?
>>
>>I ended up putting it all in a table - hope I haven't mixed anything up.
>>
>>
>>BTW, what do you think of the idea of accepting DI, C, IR and HR as synonyms 
>>for in_bit, out_bit, in_word and out_word? (Wishlist #896274) I think they'd 
>>be a lot more meaningful to the average user...
> 
> 
> 
> 
>  Adding it to the code is simple enough. This is all very confusing
> mostly because a lot of different names are given to the same things in
> several places. The modbus specification uses one naming convention,
> then these things get mapped onto completely different things for each
> PLC vendor (Modicon doesn't really let you access the inputs and outputs
> directly, as the standard assumes you should, etc...).
> 
>  I myself can't figure out what your DI, C, IR and HR stand for! I used
> in_bit, out_bit, ..., because I thought it would be the simplest to
> understand. Adding the function codes to the manual page should resolve
> all doubts. Anyway, if everybody can come to a consensus to what we
> should call them , I will gladly change it. Or you may do so if you
> wish. It is fine by me. I just find this all very confusing myself...
> 
> 
>  BTW, the table looks great. Could you please explain what the 'long
> address' entry is though? I can't figure it out myself!
> 
> 
> 
>   Cheers,
> 
> 		Mario.
> 
> 
> 
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