During the period of bad IFO state which started at approx 12:12 PDT, the ITMX SWWD triped the SEI-B3 system. In the plot below, Ch1 shows the ITMX SUS top stage F1 OSEM signal, which rapidly exceeded its 95mV trip limit. This started the SUS SWWD counter. Five minutes later, Ch2 shows the signal going to the SEI-B3 drop to zero (the BAD state). This started the SEI SWWD counter, shown in Ch3 as going from one (GOOD) to three (1ST COUNTER). Four minutes later the SEI SWWD transitioned to four (2ND COUNTER) and one minute later tripped the SWWD, which zeroed all SEI-B3 DAC outputs. This shows up on the RMS plot as a slightly elevated signal, but SUS continues to be rung up. At 12:27 the operator intervened and manually panic'ed the SUS SWWD, at which point the RFM started decreasing.
Here is a timeline of the CDS issues we had today (all times local):
10:37 h1oaf0 models stop running
11:11 h1oaf0 models restarted
11:15 h1calex and h1caley models restarted with IRIGB channels added
11:55 DAQ restarted due to cal model changes
12:12 SUS ITMX rings up
12:22 SEI-B3 SWWD trip
12:27 SUSB123 manual trip of DAC