Ditto here. Our system has been down only once since 1990 and that was because of flooding when we abandonded our facility. Only FBM failures were when doing a CP reboot after a major upgrade (never while on line). Lost two analog channels on separate FBM since 1990. Regarding filedbus issues, we experienced fieldbus errors and found the length of a FT pair had to be very close. So we just disable automatic switching and let it switch if there is a failure. This has resolved our fieldbus problems. Our goal IS 100% uptime. We have achieved just under than 99.9900% The magic of Nines Availability Downtime/Yr 90.0000% 37 days 99.0000% 3.7 Days 99.9000% 8.8 Days 99.9900% 53 minutes 99.9990% 5.3 minutes 99.9999% 32 seconds >>> Hank.Matic@xxxxxxxxxxxxxxx 6/16/2004 4:31:29 AM >>> We've been running Foxboro I/A here since 1990 , with only one major upgrade for the y2k fiasco. At that time we replaced our CP10's with CP30's , our AP20's with AW51E's , our PW's with AW51B's , our WP20's with WP30's and WP51B's. With the original hardware the highest failures we had were on WP20's especially when they were rebooted. The minor failures we have had on FBM's ( usually single piont failures ) were due to events out in the field rather than the hardware itself. We experienced a small failure rate on the FBM's when we did EEPROM updates and we had an AW51E fail in infantcy. Thru all of that we never experienced any down time on our units due to the I/A system. Our other plants have WGH systems , 2 of the plants that use the DCS for controls have had significant failures which caused one plant to go offline , and caused some signifiacnt damage at the other. All in all I'm happy with I/A although I wouldn't recommend the Microsoft version to anyone. _______________________________________________________________________ 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: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave _______________________________________________________________________ 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: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave _______________________________________________________________________ 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: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave