Re: CP40 based AB Station that would let us take our block periods back to
0.5 sec
FYI: The hardware is AB hardware. We don't manufacture it; we put software
on their hardware. In that regard, the AB-Station is similar to what
Honeywell does with ControlLogix (sp?) when they create ProcessLogix (sp?).
They put their software on a board manufactured by AB and installed in the
PLC.
Regards,
Alex Johnson
The Foxboro Company
10707 Haddington
Houston, TX 77043
713.722.2859 (v)
713.722.2700 (sb)
713.932.0222 (f)
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
-----Original Message-----
From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
Sent: Wednesday, May 03, 2000 11:45 AM
To: Foxboro DCS Mail List
Subject: Re: Integrator 30s vs. AB Stations
Stan,
Regarding loading on AB Stations, you can run a 0.5 sec BPC with the
same
type of issues you see on a CP30 - although the AB Station will
support
1000 block equivalents, you can only use about 100 blocks if you
want them
all running every 0.5 sec.
AB Station loading problems have been one of the hot button issues
here
since our mill startup 4 years ago. Our systems integrator had
worked with
AB Gateways before rather than AB Stations and had not forseen the
limitations they would run into setting up 900+ CIN and COUT blocks
on each
AB Station (or so it was explained to me). We've been fighting this
ever
since. We have replaced a lot of the CIN and COUT blocks with MCIN
(and
BLNALM) and MCOUT blocks, however these blocks leave a lot to be
desired
for system documentation and troubleshooting.
I would love to see a CP40 based AB Station that would let us take
our
block periods back to 0.5 sec, but I won't hold my breath.
Kevin FitzGerrell
Fairbanks Gold Mining, Inc.
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