Hi!

A follow-up to your response:

You do realize that I'm talking about adding the onchip
high-speed-but-low-resolution ADC in addition to the external
low-speed-but-high-resolution ADC of the base system, right?

Thanks,
   Bill

On 3/26/07, Aaron <aaron.groups@gmail.com> wrote:
> Absolutely provide access to the onboard ADC!  I've been doing PLC
> programming 6+ years and can count on one hand the number of PLC
> applications without analog that I've completed.
>
> Aaron
>
> William Couture wrote:
>
> >Well, at work we're adding PLC functionality to our temperature
> >control units, doing (at least for now) ladder logic.
> >
> >We have a 16-bit ADC with support circuitry, and can do a 24-bit ADC
> >if we need to.  However, this is a fairly slow ADC (as low as 8 samples
> >per second).
> >
> >However, I'm saying that, if we are going to allow users PLC-type
> >programmability, we should also give them some kind of access
> >to the on-board ADC.  While it is only 10-bits (and figure 8 bits
> >with noise and whatnot), they can have kilohertz update frequences.
> >
> >The EE says that it would be "useless" unless the surrounding
> >circuity was designed for a specific application.  I'm saying that
> >we don't know what they will want to do, so we should give them
> >maximum flexibility, even if that means that they have to add an
> >external opamp (beyond our onboard opamp / buffer).
> >
> >Your thoughts?
> >
> >Thanks,
> >   Bill
> >
> >
> >
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