AdV-DET (Output mode cleaner)mwas - 9:38 Tuesday 23 October 2018 (43233)
Print this reportComment to IMC and OMC shutter antagonist automation (43219)The question is why DET_MAIN received a request to go to the SHUTTER_CLOSED state while the ITF is not locked in recombined:
the slow shutter cannot be closed while Michelson fringes are flashing. The question is why ITF_LOCK made this request while it is in the DOWN state, I can't find it anywhere in the ITF_LOCK.py code.
To prevent the DET_MAIN from being in an infinite loop of trying to close the slow shutter, added a check that after 5 failed attempts it will go into the UNSAFE_B1p dead end state, and wait there for some action.