Re: [foxboro] FCP vs. ZCP? (forked from: network storm)

  • From: "Bounds, Glen" <glen.bounds@xxxxxxxxxxxxxxxx>
  • To: <foxboro@xxxxxxxxxxxxx>
  • Date: Thu, 12 Feb 2009 15:55:15 -0500

Actually, I disagree with Alex on the CP60 issue (sorry AJ). I would upgrade 
CP10/CP30/CP40's with ZCP270's because you can reuse the existing FBI's.  If 
you have CP60's installed with DCM's, I would go with FCP's because you have to 
change some of the hardware anyway.

So my "rule of thumb" is if you have CP60's change to FCP's.  Earlier CP's 
could stick with ZCP's.

Either way, you have to add FCM's or FBI100's and a baseplate, so space is an 
issue for existing systems.

The problem is the same as always, there are always 15 different ways to 
accomplish the same thing with this stuff.

YMMV,

Ex-customer, now verdor...
 
Glen Bounds
Technical Manager
Invensys Middle East FZE
P.O.Box: 61495
Jebel Ali, Dubai, UAE
 
Office Phone: +971 4 8811440 x315
Office Fax: +971 4 8811421
Mobile: +97150-6577238
Email: glen.bounds@xxxxxxxxxxxxxxxx
 
________________________________

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On 
Behalf Of Johnson, Alex P (IPS)
Sent: Friday, February 13, 2009 12:40 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FCP vs. ZCP? (forked from: network storm)

Rules of thumb are just that - rules of thumb not divine edicts and my opinions 
are just my opinions.

On upgrades, ZCP makes a lot of sense esp. if you are upgrading CP60s.

On grass-roots projects, there are many things to consider that IM(not-so)HO 
make the FCP the better offering.

There are exceptions though - a really large unit with lots of FDSIs and tight 
control cycles might well benefit from the much more distributed fieldbus 
network.


Still, I don't like placing FCMs directly on the MESH in the same broadcast 
domain as the CPs and workstations. When V8.x was released, there was no option 
if you needed plant-wide SOE or the Transient Data Recording/Transient Data 
Acquisition packages and wanted off-the-MESH FCMs.

With the release of VLANs on the MESH, we have a potential solution to that 
dilemma (off MESH and all functions) though it does require more NICs in the AW 
running the SOE and/or TDR/TDA packages.

Does this help explain my bias?

Regards,
 
Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (desk)
713 329 1600 (operator)
713 329 1944 (SSC Fax)
713 329 1700 (Central Fax)
alex.johnson@xxxxxxxxxxxxxxxx

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On 
Behalf Of Corey R Clingo
Sent: Thursday, February 12, 2009 12:35 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] FCP vs. ZCP? (forked from: network storm)

"As a rule of thumb, I recommend FCPs over ZCPs in almost all cases."

Interesting comment.  We are evaluating migration options here, and so far 
have been assuming ZCP270s.  Aside from being able to use existing racks 
(which varies in importance from installation to installation, and may be 
superseded by other factors), the ZCP has a 100Mbps fieldbus.  That's 
overkill for sure, but I was worried that the 2Mbps fieldbus of the FCP 
might not be enough for the full 60-FBM complement, especially if using 
many FDSI or DCI FBMs.  The FCP advantages were simplified cabling and 
less installation space (since it mounts in an FBM baseplate or something 
similar).


But your statement below, that the ZCP lacks some software functionality 
that the FCP has, is news to me.  Are there plans to add it to the ZCP 
image?  Is FCP going to be the future direction (and in the process, will 
ZCPs get end-of-life'd faster)?  Are you going to have to keep them more 
environment-controlled than the FBMs (we have already seen by accident 
that the FBMs will not meet their stated ~140°F temperature ratings)?


Also, what is TDR/TDA?  Those are TLAs I haven't heard yet.


Thanks,
Corey Clingo
BASF Corp.





"Johnson, Alex P (IPS)" <alex.johnson@xxxxxxxxxxxxxxxx> 
Sent by: foxboro-bounce@xxxxxxxxxxxxx
02/06/2009 01:52 PM
Please respond to
foxboro@xxxxxxxxxxxxx


To
<foxboro@xxxxxxxxxxxxx>
cc

Subject
Re: [foxboro] network storm






The FCP, ZCP, and FCM are designed to hold up under a storm though 
communications to the FCM from a ZCP if both are on the MESH will be 
impaired.

Since FCPs do not use FCMs, they will not have an issue in the event of 
such a storm. They talk directly to the FBMs over an IEEE 1118 bus.

In general, I prefer to see the FBMs off the MESH. It just seems prudent.

The ZCP supports that mode of operation just as the CP60 did. However, you 
do give up the V8 SOE mechanism and the TDR/TDA support under the ZCP 
because it lacks those services in its image. The FCP does have them.

As a rule of thumb, I recommend FCPs over ZCPs in almost all cases.


Regards,
 
Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (desk)
713 329 1600 (operator)
713 329 1944 (SSC Fax)
713 329 1700 (Central Fax)
alex.johnson@xxxxxxxxxxxxxxxx

 
 


 
 
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This e-mail and any associated files are intended solely for the individual or 
entity to whom they are addressed. Please do not copy it or use it for any 
purposes, or disclose its contents to any other person. Further, this e-mail 
and any associated files may be confidential and further may be legally 
privileged. This email is from the Invensys Process Systems business unit of 
Invensys plc which is a company registered in England and Wales with its 
registered office at Portland House, Bressenden Place, London, SW1E 5BF 
(Registered number 166023).  For a list of European legal entities within the 
Invensys Process Systems business group, please click here 
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If you have received this e-mail in error, you are on notice of its status. 
Please notify us immediately by reply e-mail and then delete this message from 
your system. Thank you for your co-operation. You may contact our Helpdesk on 
+44 (0)20 7821 3859 / 2105 or email inet.hqhelpdesk@xxxxxxxxxxxxx This e-mail 
and any attachments thereto may be subject to the terms of any agreements 
between Invensys (and/or its subsidiaries and affiliates) and the recipient 
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