At ~15:28 the IMC suffered a DAC and DK error causing OSEM values in MC1 and MC3 to change drastically. Slider values have not changed. WFS history was cleared. The Drift_Mon panel on the right (in the figure below) is from 2 hours prior. The diag reset function on the CDS overview reset the DAC error but it seems that some models and computers need to be restarted. Currently I'm waiting or Dave Barker to arrive.