Reports until 21:25, Sunday 21 October 2018
H1 ISC (ISC)
craig.cahillane@LIGO.ORG - posted 21:25, Sunday 21 October 2018 (44716)
Violin Mode ETMY Mode 5 not damped by guardian
After the last lockloss, ETMY Mode 5 was rung up bad enough to prevent locking on the OMC.  I turned on ENGAGE_DAMPING_ALL in the violin mode guardian while sitting on RF DARM.
This helped with many of the modes, but ETMY Mode 5 was the most rung up, and the guardian did not turn on this damping (gain was at 0).  
I turned it on and it worked very quickly with a gain setting of 2 (gain of 20 was too much).
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