A. Effler, R. Short
People had noticed earlier an issue with SRM's coil driver binary IO state (see alog88486) so other optics were checked. ITMX's monitors showed some concerning colors (see first screenshot), but after taking a spectra of the quad's top-mass OSEMs comparing similar lock states before and after the power outage last week (see second screenshot), I am confident in saying the actual behavior of ITMX is unchanged and this boils down to a readback issue on the binary IO. This evidence is backed up by the fact that ITMX has been correctly aligned in our locking attempts, and Anamaria and I cycled the state requests a few times and saw expected behavior from the suspension. Dave says he and others will be looking into this.
ITMX's BIO readback started deviating this Wed at 15:05. At this time we were restarting the DAQ for a second time to install a new h1ascimc model and add the new Beckhoff JAC channels to the EDC. If you trend H1:SUS-ITMX_BIO_M0_MON it was nominal going into the DAQ restart, and in deviation when the DAQ came back, presumably a coincidence.
By this time on Wednesday all hardware changes had been completed (asc0 upgrade, Beckhoff chassis work), hence the DAQ restart.
Trending back it looks like this happened in March/April this year just before the end of O4b (01apr2025). It started Sun30mar2025 and ended Wed02apr2025. I don't see any record of whether it was fixed on 02apr2024 or fixed itself.