Reports until 16:12, Friday 21 February 2014
H1 SUS
arnaud.pele@LIGO.ORG - posted 16:12, Friday 21 February 2014 - last comment - 12:49, Sunday 23 February 2014(10257)
HAM2 HAM3 trip

HAM2 and HAM3 as well as the HEPIs tripped at the exact same time (actuator trip for all of them) @ gps 1077061619 (15:46 PT)

Comments related to this report
arnaud.pele@LIGO.ORG - 20:34, Friday 21 February 2014 (10270)
Link

It happened again this evening when Sheila restarted the Beckhoff at 1077078129. HAM2 and HAM3 ISI actuactors tripped because of a spike in the act signal, as well as the HEPI. cf attached plots

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sheila.dwyer@LIGO.ORG - 12:49, Sunday 23 February 2014 (10272)
Link

Jamie and I tried this a few more times..

Stoping and restarting the EPICs database doesn't unlock the IMC.

Stoping PLC2 does unlok the IMC (and FSS) , although in the three times I tried it it didn't trip any HAMs today. Restarting the other PLCs doesn't cause any problems, and it doesn't matter wether or not the Guardian is running.