Reports until 20:48, Wednesday 20 August 2014
LHO General (CDS, FMP)
patrick.thomas@LIGO.ORG - posted 20:48, Wednesday 20 August 2014 - last comment - 12:05, Thursday 21 August 2014(13524)
end X FMCS readbacks invalid 
It appears that the end X FMCS EPICS readbacks went invalid at around 08/19/2014 23:35 UTC (from a trend of H0:FMC-EX_VEA_202A_DEGF). I checked the FMCS Windows computer and they appear to be down there as well. I'm not sure how to fix this, so I will email John.
Comments related to this report
jeffrey.kissel@LIGO.ORG - 22:04, Wednesday 20 August 2014 (13527)
Link 

J. Kissel, J. Worden

John called and suggested we reboot the FMCS machine in the back of the control room. After 20 minutes of windows updates, I was able to log back in, but the status of the X-end did not change. We're both unsure if there's any program to be restarted, but John thinks not. The in-vacuum components (SEI / SUS), nor to the ground instruments (T240 / BRS / PEM) and other PEM instruments show no sign of bad news, and the vacuum pressure looks reasonable, so we assume this is just a failure of the readback system. John will look into the problem when he's back in on Friday.
cyrus.reed@LIGO.ORG - 12:05, Thursday 21 August 2014 (13539)
Link 

This is a known issue with the network hubs that are used in the mechanical room to connect the FMCS controller to the network (along with a couple other systems); they are flaky after power outages, and just in general.  In this case, I changed out the hardware since it's been flaky over the past few days and the usual power on/power off thing didn't clear it up today.  The long term fix is to pull more cable so that these things can be directly connected to a real switch.

P.S.  Only the vacuum system shares any common infrastructure with FMCS - the operation (or non-operation) of any 'fast' front end EPICS system is not a useful indicator for problems limited to either of these (vacuum/FMCS).