Re: [foxboro] CP60 and FBM legacy
- From: Troy L Brazell <tlbrazell@xxxxxxxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Fri, 21 Oct 2005 08:31:52 -0500
Question ......... The CP60s should run at .5 BPC ..... correct? The only
time that I have setup CPs at anything other than a .5 BPC is when used in
Expander Compressor controls. In this case I set the BPC at .1.
Then the period on the blocks in this CP should have a period based on the
required process speed. We typically use 1 second for most control
applications, temperatures we run at 30 seconds or greater if used for
indication only.
We have upgraded numerous CP40s to CP60s and have always seen a significant
drop in the processor loading.
Troy L. Brazell
Duke Energy Field Services
Sr. Process Control Analyst
ISA CCST
Phone (405) 263 4688 ext. 30
Cell (806) 898 4340
Okarche Plant
Route 3 Box 95
Okarche, OK. 73762
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joseph wu
<josewusan@yahoo.
com> To
Sent by: foxboro@xxxxxxxxxxxxx
foxboro-bounce@fr cc
eelists.org
Subject
Re: [foxboro] CP60 and FBM legacy
10/21/2005 08:07
AM
Please respond to
foxboro@freelists
.org
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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