Re: [CAD_CAM_EDM_DRO] Re: PLC's and industrial automation

Hello Robin,
If 180 bucks are ok with you:
I like the Siemens Logo unit 12 inputs 8 outputs
There are including versions with analog inputs.
They programmed by logical blocks.
Only thing the cable is expensive.
Get yourself the demo version 2.0 for free
and I email you the missing files to make it work completely.
Another cheap thing is Telemecanique Zelio.
Its faster but less inteligent. for the same price.
Have fun
Sven Peter


Robin S. wrote:

> I have a bit of experience with PLCs (Allen-Bradley) and ladder
> logic. It's very simple stuff.
>
> Hewe's a link to an AB PLC instruction manual:
> http://www.ab.com/manuals/cp/1785-6_1.pdf
>
> You can find quite a bit of info if you search for ladder logic, or
> something like that on a search engine.
>
> Say, does anyone know of an inexpensive PLC for cheap bums like me?
> I'd like something like 8-16 inputs and 8-16 outputs... Any thoughts?
> It should have cheap software also, and run on a Winblows box
> (although I will probably be using a Linux system soon when I get my
> paws on the BDI EMC). Used/surplus is fine, but it's nice to have a
> supplier of inexpensive controllers on hand :)
>
> Regards,
>
> Robin
>
> --- In CAD_CAM_EDM_DRO@y..., Doug Fortune <pentam@h...> wrote:
>
>> Doug Harrison wrote:
>>
>> The wrinkle is that the size of each of the custom pieces was known
>> only shortly before, by a process futher down the line. Therefore,
>
> the
>
>> requirements were to be (dynamically) sent via ethernet to the pc
>> doing the cutting. I presume an advanced PLC could do this (read
>> from an ethernet, and change its behaviour appropriately), but I
>> don't have any experience with PLC's.
>>
>> OK - lets hear from the PLC experts (maybe a short tutorial).
>> What is all this 'ladder logic' stuff? Is it programmed serially
>> into a static memory? ... or ?
>>
>> Doug Fortune
>> http://www.cncKITS.com
>
>
>
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