Re: [foxboro] CP60 and FBM legacy

The CP60 will outperform in all respects CP40As if the I/O chain is split
across multiple FCMs/DCMs.

If it is a minimal 1 to 1 replacement, i.e, 1 CP40 becomes 1 CP60 with 1
DCM, the performance will be inferior for I/O with some drag on block
processing.



Regards,
 
Alex Johnson
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77063
+1 713 722 2859 (voice)
+1 713 932 0222 (fax)
+1 713 722 2700 (switchboard)
alex.johnson@xxxxxxxxxxxxxxxx
 

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Corey R Clingo
Sent: Friday, October 21, 2005 4:04 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] CP60 and FBM legacy

Since she hasn't chimed in yet, I'll say that one of my esteemed 
colleagues here upgraded a CP40A to a CP60 and saw a 20% or more drop in 
idle time.  I'm not sure what happened with the IO scan time.

We've heard anecdotal evidence, both from within and without Foxboro, that 
CP40As in particular handle heavy IO, and maybe even block, loading better 
then CP60s do (at least where 100-series FBMs are concerned).  If true, 
this is going to make it tough for folks who want to avoid end-of-life 
issues for CP40As, but aren't ready for version 8 and CP270s.


Corey Clingo
BASF Corp.







"Jaime Claramunt R. (Inforsa)" <jclaramunt@xxxxxxxxxxxxxxx>
Sent by: foxboro-bounce@xxxxxxxxxxxxx
10/21/2005 09:37 AM
Please respond to foxboro

              To:  foxboro 
              cc: 
         Subject:       Re: [foxboro] CP60 and FBM legacy






yeah... when I said 0.5s I meant the main cycle of CP... not 0.1s as is
allowed now with CP60. (sorry)
sure, we have most of blocks at 1s, so 2 phases to run them...
by now we are trying to reduce overruns by doing some "phasing" but just 
to
assure system 'till we found permanent solution.

about how many fbm for this CP... around 50 , in 3 distributed cabinets.
I/O load increased very much... twice I'ld say...
This approach (more DCM) is what local rep is aiming for now...




-----Mensaje original-----
De: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]En
nombre de joseph wu
Enviado el: Viernes, 21 de Octubre de 2005 10:08
Para: foxboro@xxxxxxxxxxxxx
Asunto: Re: [foxboro] CP60 and FBM legacy


Running at 0.5 sec only allow one phase (0).  CP60 can hold a lot more
blocks than the older version.  It does not mean you can run all the 
blocks
in the CP in the same phase.  There is a running limit (Don't recall 
exactly
but is about the same as older version CP).  Try running other blocks in a
slower scan rate.  You must have a very special application to run all
blocks in 0.5 sec.

Picure it as trying to pick up as many fish in a barrel witrh your bare
hands.  Even though the barrel get bigger, it does not mean you can pick 
up
more fish with the same two hands.

Good luck!
"Jaime Claramunt R. (Inforsa)" <jclaramunt@xxxxxxxxxxxxxxx> wrote:
Hey List...

We recently upgraded one of our 10 CP40A-FT to CP60FT. (well, with all net
changes required... V7.x, FO switches, etc)
We found a prob here...
CP60 new loads are very high... control loads... running at 0.5s , it's
reaching 112% and 44% (phase 0,1). Worse than our old CP40...
We used one pair of DCM to interfase new CP60 and existent legacy fieldbus
(3 remote racks, pair of PIO each)

We are working with our local reps. but not too much clues yet...

Does anybody has some hints ??

Thx. Regards,

Jaime Claramunt
INFORSA Paper Mill
CHILE







 
 
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