Re: [foxboro] FBM Letterbugs
- From: "James Kahlden" <James.Kahlden@xxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Thu, 13 Mar 2003 10:57:16 -0600
Tom,
Thanks for the reply. No our system is using CP40A's connected to the legacy
FBMs. We have CP40A's with Version 6.1 and 6.3 software. We do have a CP60,
but is using the 200series FBMs and they are at version 6.3 and have not seen a
problem there.
Jim
>>> tom.vandewater@xxxxxxxxxxxxxx 03/13/03 10:31AM >>>
Jim,
Are the legacy FBM's that have had the problem connected to CP-60's?
I'm just curious because we had this same thing happen when we moved a lot
of our legacy FBM's from CP-30/40's to CP-60's. We used FBI10E's to convert
from the CP-60's, 10mbs, ethernet fieldbus to the legacy FBM's RS-485
268kbs fieldbus. It may have just been a coincidence but we definitely have
more fieldbus communication issues on CP-60's at version 6.2.1, both legacy
and 200series. And I remember having some problems with legacy FBM's that
had been running on CP-30's/40's that weren't recognized by the CP-60's
until we replaced or reseated the letterbugs. I've heard that Foxboro has
made improvements in Ver. 6.4. I still have an active CAR that deals with
issues of EEPROM updates concerning CP-60 fieldbus modules.
Tom VandeWater
Control System Developer/Analyst
Dow Corning Corp.
Carrollton, KY
-----Original Message-----
From: James Kahlden [mailto:James.Kahlden@xxxxxxxx]
Sent: Thursday, March 13, 2003 9:51 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] FBM Letterbugs
We have had several failures recently of legacy FBMs of different types.
They fail red/green and the message is loss of communication. We found that
in almost all cases, that the FBM letterbug needed to be reseated or
replaced to get the FBM to work again. These FBMs have been in service for
6 to 7 years. These FBMS are installed in 1X8 FBM racks inside Rittal
cabinets in an air conditioned environment. During our recent outage we
checked the nosecone and letterbug of all of our FBMs. While pushing on the
letterbug we had 12 FBM's (out of about 400) reboot. Have any others on
the list experienced this? If so, what have you done to correct it?
Thanks,
Jim Kahlden
jkahlden@xxxxxxxx
Lower Colorado River Authority
Fayette Power Project
6549 Power Plant Road
La Grange, TX 78945
(979) 249-8514 (Ph)
(979) 249-8390 (Fax)
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