Overnight the ITMX coil driver states were wrong, causing the ASC controls to satuate the PUM durring acquisition. (This become aparent when the DHARD gains are increased at the end of DHARD WFS, which happens right before PARK_ALS_VCO 80699)
This used to be reset in ISC_LOCK PREP_FOR_LOCKING state, this has been commented out (line 618), with a note that SDF will take care of this, this has been commented out in the guardian for over a year. Indeed. we found that the coil driver state was incorrectly set to 3
The attached screenshot shows the error was introduced to the safe.snap sometime between 2:30 and 5 pm yesterday, as it was correctly reset in the first two locking attempts of the day, but wasn't correctly reset after the lockloss at 5 local time last night.
Erik, EJ, Dave:
We found that h1susitmx's safe.snap file was truncated from 2265 lines to 1336 lines (last 929 lines removed) at 14:47 Tue 15oct2024. This truncated file was loaded into the model at 17:09 Tue. The BIO STATEREQ channels were in the missing block, and so were not restored to val=2 until the safe.snap file was fixed Wed 09:20.