Re: [foxboro] CP40 to CP60 Fieldbus upgrade
- From: "spersico" <spersico@xxxxxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Wed, 28 Jan 2004 17:23:05 +0100
Anyone experienced a CP DELAY problem on new 60 h/w ???
I 've replaceded a single CP40A with a 60 with a single couple of DCM10e.
I've about 68 devices on fieldbus (6 CORIOLIS, 12 HTG, and rest of Y-FBM
divided into 3 FBI).
Many SEQ on CP. While the total loading still be the same (or quite better)
i'm experiencing an horrible CP DELAY in comunication to devices on other CP
fieldbus.
This problem start every time i make a compilation on seq or simply an
operation on ICC and grow up with time.
The strange thing is that SEQ manage valve, pumps and other on own fieldbus
normally while the same operation on other CP is slooooooow !!!!!
Planned to change h/w rev of CP (now a G)
Other CP 60 with less FBM but same n° of SEQ run normally (REV L & M)
Try to think about CSIZE/CSPACE params
Suggestions ????
tom.vandewater@xxxxxxxxxxxxxx scrive:
> FYI,
> We used 5 CP60's to replace 19 CP10's and 7 CP30's communicating
> with a "bunch" of 100 series, (legacy), FBM's. We used one set of
> DCM's/CP60 and combined the seperate fieldbusses by attaching multiple
> legacy FBI's in series with the DCM using the old twisted pair "twinax".
> The most 100 series FBM's that we have communicating to a CP60 via one set
> of DCM's is 57. The fieldbus scan loading as viewed through the CP60
> Station block is 60%, which is a lot higher than I really want but the
> Control loading, Cont. + Seq. is less than 10% and the station idle time is
> still 79%!! I am not experiencing any processor overruns so the CP60 can
> really get with it compared to the old stations.
> If you have more than 60 legacy FBM's and think you will want to
> expand I/O on the CP in the future, I would suggest replacing the FBI's with
> FBI10E's. You could put in multiple DCM's to connect to the FBI's in each
> fieldbus enclosure but it is cleaner just using the FBI10E to replace both
> DCM's and legacy FBI's. This will reduce your fieldbus scan loading
> considerably. We have one CP60 that communicates to 96 legacy FBM's via 6
> FBI10E segments and nine 200 series FBM's via 3 FCM fieldbus segments and
> the fieldbus scan loading is only 35%!
> The single DCM solution was a lot cheaper for us because we already
> had a bunch of legacy FBI's in place and had spares that could be installed
> where needed. If I had to buy the legacy FBI's anyway I would definitely
> buy FBI10E's. Hope this is helpful.
>
> Tom VandeWater
> Control Systems Developer/Analyst
> Dow Corning Corp.
> Carrollton, KY USA
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx
> [mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of Ken Heywood
> Sent: Monday, January 26, 2004 1:10 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: Re: [foxboro] CP40 to CP60 Fieldbus upgrade
>
>
> Depends upon why you are upgrading to the CP60 ...
>
> If you are upgrading to get better throughput or add more FBMs =
> (including the 200 series), then you need to string coax and replace the =
> FBIs with DCMs. You'll be able to use up to 120 FBMs because the DCMs =
> store and forward Fieldbus messages (that's where you get the =
> performance increase on the 10Mbps line).
>
> If you just want the latest hardware and no plans for expansion, mount =
> the DCMs near the CP60 and drive your existing twinax. You'll get no =
> increase in performance out of the I/O (although you will have more =
> block capacity and CPU throughput).
>
> * K
>
>
>> -----Original Message-----
>> From: Bismarck Alban [mailto:balban@xxxxxxxxxxxxxxxx]
>> Sent: Monday, January 26, 2004 12:58 PM
>> To: foxboro@xxxxxxxxxxxxx
>> Subject: [foxboro] CP40 to CP60 Fieldbus upgrade
>>=20
>>=20
>>=20
>> Hi everyone
>>=20
>> I=B4m looking for upgrade a CP40FT to CP60FT.
>> Actually, the CP40FT (attach: old_system.gif) have some
>> remote enclosures with Fieldbus Isolators Modules (FBI) and about
>> 12 FBMs at each one.
>> The questions are:
>> 1. could I maintain the existent FBI (as attach: new_system.gif)?
>> 2. should i change all existent FBI to FBI10E?
>> 3. should i change the existent Twisted pair shielding cable=20
>> between the
>> enclosures to 50 ohm coaxial cable?
>>=20
>> Thanks for any suggestion
>>=20
>> Bismarck Alb=E1n
>> Tecniequipos S.A.
>>=20
>>=20
>> =20
>> =20
>> ______________________________________________________________
>> _________
>> This mailing list is neither sponsored nor endorsed by=20
>> Invensys Process
>> Systems (formerly The Foxboro Company). Use the info you=20
>> obtain here at
>> your own risks. Read=20
> http://www.thecassandraproject.org/disclaimer.html
> =20
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> _______________________________________________________________________
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> Systems (formerly The Foxboro Company). Use the info you obtain here at
> your own risks. Read http://www.thecassandraproject.org/disclaimer.html
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