Alan
Yes we looked into this but it was not feasible. As we are connecting to a
AB SLC504 we needed the KF2 module. During our first attempt, our Foxboro
rep. sold us on the idea of using FoxBlocks on the AW to tie directly to the
PLC. This was a new feature that had been done successfully with Modicon
PLC's and we were told the AB drivers had just been released. To make a
long story short, it turned out Foxboro Development had not released the
drivers, where Marketing thought they had (Go figure). A bouquet to our
local reps as when they found out about the mistake, they made it right by
giving us the equipment to make it work (old method but it works). About 4
months ago I was informed that the FoxBlocks for the AB series are now
released. It would have been a better and cheaper solution, but we are
committed to our present course. You may want to check it out.
Regards
John
> -----Original Message-----
> From: Alan J Schaff [SMTP:[EMAIL PROTECTED]]
> Sent: September 8, 2000 6:49 AM
> To: Foxboro DCS Mail List
> Subject: RE: AB KF2 at 19.2 Kbaud?
>
> John,
> We are looking at using the radio modem for a remote PLC. We are going to
> try
> to connect the modem directly to a comm port on the AI30. Have you tried
> this
> option? I like it because it eliminates the need for a KF2 box. Anyone
> else
> have experience using radio modems for Allen Bradly???
>
> Thanks
> Alan Schaff
>
>
>
>
>
>
>
> Campbell John C <[EMAIL PROTECTED]> on 09/07/2000 10:31:51 AM
>
> Please respond to Foxboro DCS Mail List
> <[EMAIL PROTECTED]>
> To: 'Foxboro DCS Mail List' <Foxboro
> cc:
> Subject: RE: AB KF2 at 19.2 Kbaud?
>
>
>
> Very interesting Kirk, we also are using KF2 modules at 9600 baud, but
> with
> a small twist. We are connecting to a SLC504 via a radio modem. By the
> way, this may be a stupid question, but what is a GP?
>
> Regards
>
> John Campbell
>
> > -----Original Message-----
> > From: Kirk D Carver [SMTP:[EMAIL PROTECTED]]
> > Sent: September 6, 2000 2:04 PM
> > To: Foxboro DCS Mail List
> > Subject: Re: AB KF2 at 19.2 Kbaud?
> >
> >
> >
> > From our in house AB guru:
> >
> > " I do not know of a situation in which it wouldn't work at 19.2K, but
> > the
> > bandwidth requirement is small: the bottleneck is the GP, not the DF1
> > line. If
> > he's actually getting real empirical results back showing a huge ==x2
> > improvement when moving the DF1 connection from 9600 to 19.2K, then I'd
> be
> > both
> > surprised and suspecting his ABSCAN and compound configuration. "
> >
> >
> > ....and from our local rep:
> >
> >
> > " First, let's clear up any potential confusion.
> >
> > 1770-KF2 - Stand alone box w/ 120VAC power (from outlet) that converts
> DH+
> > messages to RS-232C DF1 messages for communicating with the Foxboro.
> >
> > 1785-KE - PLC "slide-in" module that does the exact same thing. (It
> fits
> > in
> > a 1771 I/O chassis).
> >
> > The 1770-KF2 does NOT have an option for communicating at 19.2K
> > The 1785-KE DOES let you go 19.2K.
> > Other than that, they are the same beast.
> >
> > The only (potential) draw back to going to 19.2K baud on a 1785-KE
> module
> > is
> > the baud rate is less noise resistant.
> > It does work, though, and I have little or no problems with it handling
> > that
> > (blazing?!?!) speed! You shouldn't see any problems in your
> > installations,
> > since you guy's typically use well shielded cable for your serial
> > interfaces.
> >
> > Kirk, I know you have a lot of "KE" modules out there, but I do think
> you
> > are using some KF2 modules also, although I don't know where. The
> > Foxboro,
> > or any DCS, can not tell the difference between the two, since they're
> are
> > basically the same thing, only in a different housing."
> >
> >
> > ____________________
> > Kirk Carver
> > ExxonMobil Chemical
> > Beaumont Polyethylene Plant
> > PO Box 2295
> > Beaumont, Texas 77704
> > Phone: 409-860-1314
> > [EMAIL PROTECTED]
> > -----------------------------------------
> >
> >
> >
> >
> > David Johnson <[EMAIL PROTECTED]> on 09/06/2000 09:32:08 AM
> >
> > Please respond to "Foxboro DCS Mail List"
> > <[EMAIL PROTECTED]>
> >
> > To: [EMAIL PROTECTED]
> > cc: (bcc: Kirk D Carver/Beaumont/Mobil-Notes)
> > Subject: AB KF2 at 19.2 Kbaud?
> >
> >
> >
> >
> >
> > I have noticed that most of the Allen-Bradley KF2 modules I come across
> in
> > the field are running at 9600 baud. I also know of some instances where
> a
> > Foxboro Integrator 30 is communicating with AB KF2s at 19.2 Kbaud. Is
> > there any reason not to run the baud rate at 19.2K? You sure get a lot
> > more
> > I/O throughput that way.
> >
> > Regards,
> > David
> >
> >
> > -----------------------------------------------------------------------
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> >
> >
> >
> >
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