Re: [foxboro] FCP's vs. ZCP selection on new projects
- From: "Boulay, Russ" <russ.boulay@xxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 14 Aug 2007 08:04:43 -0400
The FCP270 uses FEM100's to go beyond 32 FBM's
With the FEM100 only one pair is allowed. 4 ports going to 4 basplates
each.
So, FEM100 is trying to do all the work.
So, number per sizing spreadsheet will vary from 64 to 128 FBM's
depending on what your asking the FCP to do.
The ZCP270 can use multiple pairs of FCM100's to split it's fieldbus
load.
32 FBM's per FCM100
Multiple FCM100's drops the I/O load on a ZCP
Thus allowing more FBM's
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Kinsinger, Matthew R
Sent: Tuesday, August 14, 2007 7:58 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FCP's vs. ZCP selection on new projects
I took a class at Foxboro last week. We were interested in the new V8 =3D
stuff and learning about IACC so I only took 2001V8. Alan Leslie, the =3D
person teaching the course, made it very clear the FCP270 now supports =3D
128x 200 series FBMs and 64 100 series. I notice many of you are still =3D
focusing on the original 32 then 64 200 series supported. =3D20
With the 128 supported, is the FCP still using FEM's instead of FCM's? =3D
Is that the limiting difference?
Matt Kinsinger
Process Control Engineer=3D20
PPG Barberton
330-825-1208
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
=3D
On Behalf Of Corey R Clingo
Sent: Tuesday, August 14, 2007 1:51 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FCP's vs. ZCP selection on new projects
I've been watching this whole FCP vs. ZCP discussion with some interest.
=3D
It seems to me on the surface that control system vendors today are =3D
going=3D20
to a model of more controllers with fewer I/O cards per controller, I=3D20
presume to "reserve" more power in the controller for advanced =3D
algorithms=3D20
as well as simplify the system architecture (particularly if they
don't=3D20
allow I/O remote from the controller at all). Of course as you split =3D
your=3D20
plant amongst more controllers, the amount of peer-to-peer you end up=3D20
doing probably increases. I wonder how the industry in general is =3D
dealing=3D20
with that (besides going to faster networks, of course).
I don't have any CPs right now that have more than 61 FBMs, but if the =3D
FCP=3D20
is limited to 64, I would likely split a 50+ FBM CP40 up into two FCPs =3D
if=3D20
I were going to use those, just so I could have a few more spare I/O. =3D
I'd=3D20
probably end up doing some more P2P though to effect that split. P2P =3D
has=3D20
worked well for me in the past, but I use it sparingly. Is it any =3D
better=3D20
on the FCP than, say, a CP60?
Like Tom, I like the ZCP's capabilities and the FCP's form factor.
Corey Clingo
BASF Corporation
"Johnson, Alex P \(IPS\)" <alex.johnson@xxxxxxxxxxxxxxxx>=3D20
Sent by: foxboro-bounce@xxxxxxxxxxxxx
08/13/2007 11:11 PM
Please respond to
foxboro@xxxxxxxxxxxxx
To
<foxboro@xxxxxxxxxxxxx>
cc
Subject
Re: [foxboro] FCP's vs. ZCP selection on new projects
I'll give it a try.
Re: I guess the FCP's were initially developed as a lower cost
alternative.
True. They were also expected to serve as a way to enter new markets
once they are self-hosting.
Re: It is my understanding that the the FCP's have the same
horsepower with the exception that they don't have fast =3D3D
Ethernet fieldbus communication. =3D3D
True enough, but a lot of the I/O performance of the ZCP comes from a
strong co-processor in the box plus the parallelism of the FCMs.
Re: Adding that capability would make the FCP's a lot more flexible and
would make it easier for them to communicate with multiple
distributed
segments of I/O in the same way as the ZCP's
The original plan was to offer three CP270s:
1) Field mounted (FCP) for use in situations where the controller would
be
Field mounted.
2) Z-module (ZCP) form factor to allow the reuse of the cabinets and =3D3D
power supplies owned by our installed base.
3) Rack mounted (RCP) which was to be - basically - ZCP in a DIN rail
mounted tin can.
We built the first two. I suppose one could argue about the product mix,
but we felt the ZCP was important to the installed base.
Clearly as we look forward to new CP hardware, the mix may change.
Re: PSSs
The specification sheets are correct.
Re: Does Foxboro have plans to release a CP in the FCP form factor that
uses
a Fast Ethernet Fieldbus?
Not in the near term.
Re: Has Foxboro considered increasing the number of FBM's that a ZCP can
communicate with?
It has been stressed test well beyond 128, but we don't see a compelling
reason to increase the published limit on the ZCP. =3D3D
Most new jobs find the FCP to offer a better $ per I/O point ratio.
Moreover, even in the installed base, a large number locations are
interested in using the FCP to free space in their rack room. An FCM
takes the same space as an FCP so unless there is a truly compelling
reason, most folks don't use the ZCP. They remove the old racks and use
the FCP.
Given the above, we've worked to improve the $ per I/O point ratio of
the FCP as being the best short-term approach for our clients.
Regards,
Alex Johnson
Invensys Systems, Inc.
10900 Equity Drive
Houston, TX 77041
713.329.8472 (voice)
713.329.1700 (fax)
713.329.1600 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx
=3D20
=3D20
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