Dirk, There has been an issue with FBM100 series going offline and back online seemingly at will. Make sure your letterbugs are fully seated. They have been known to work loose in the nosecone. = -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of dirk.pauwels@xxxxxxxxxx Sent: Friday, October 19, 2007 2:44 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] 100 Series FBM Reliability Data We have a fair number of FBM100's, from '95. Can't say we experienced any reliability problems over the past 12 years. Some minor channel problems, probably due to incorrect connections. We do have some cards going offline occasionally, but after replacement of the cards the problem remained, so the problem probably resides in the mounting structures....We also have a large amount of FBM 100 spares, so we're not thinking of replacing our old FBM100's, there's no way I can justify to management why we should be replacing them.... We also have the new FBM200's, I like them better, because they're cheaper, consume less space and allow for very clean and neat wiring in our new cabinets. Replacing the old ones however would mean downtime, and a considerable investment, which at this time cannot be justified. Rgds, Dirk Pauwels - DCS/MOC coordinator Engineering dept. Hexion Specialty Chemicals E mail: dirk.pauwels@xxxxxxxxxx T. +32.(0)3.570.95.97 F. +32.(0)3.570.16.09 Mob. +32.(0)497.428.300 = <dave.caldwell@do wcorning.com> Sent by: To = foxboro-bounce@fr <foxboro@xxxxxxxxxxxxx> eelists.org cc = = = Subject = 18-10-2007 23:31 [foxboro] 100 Series FBM Reliability Data = Please respond to foxboro@freelists .org = = All Knowing List, I need help in justifying to management why we should be replacing the 1989 vintage 100 series FBMs in our plant with brand new 200 series. The question is being asked how much longer can we continue to run before these FBMs start to fail (never mind that they aren't being made anymore). We have collected failure data from our own plant that suggests that at least some of the FBMs are showing signs of aging. I base this on a marked increase in EEPROM upgrades for the very oldest FBM04s in recent years. I've looked at the data Foxboro provides for 100 series reliability in the past, and don't think their numbers show any big failure increase. (In fact, I think some of the FBMs actually improved with age!) Of course, this data is most likely based on returned FBMs and some folks may just be putting their old ones in a dumpster. Anyway, my questions for the list are: * Does anyone have any failure data on very early 100 series FBMs? * Are there signs that these are reaching end-of-life? * Is there a reliability justification for replacing these older modules? Your thoughts are appreciated. Dave _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave = = _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. 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