jeffrey.kissel@LIGO.ORG - posted 15:39, Tuesday 13 February 2018 - last comment - 12:50, Wednesday 14 February 2018(40517)
H1 SUS ETMY R0 F2 OSEM's Test/Coil Enable BIO Frozen in OFF Position
J. Kissel, T. Sadecki, B. Weaver Betsy and Travis are beginning to resurrect the top mass OSEMs on the newly re-suspended H1 SUS ETMY. In doing so, they've found R0 F2 OSEM's Test/Coil Enable BIO Frozen in OFF Position. Toggling the test/coil enable (TCE) state from 0 or 1 moves all of the rest of the R0 TCE switches, but F2's remains in the stuck position. This could be either the readback stuck, which wouldn't be a priority to fix, or it could actually be the switch that's dead, which would be a major blocker for activity. I attach a screenshot of the M0 / R0 corner of the binary IO screen showing the problem.
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Opened corresponding FRS Ticket 9953.
This morning we looked at the electronics for the SUS test/coil enable readback for ETMY R0 F2 OSEM. Alog 40517 reports readback stuck in OFF state. We verified test/coil bit is switching inside the coil driver but the readback status change is not being captured by the binary card inside the IO chassis. Plan is to power cycle IO chassis. If error does not clear, binary card inside the IO chassis will need to be replaced.
F. Clara, R. McCarthy