Reports until 16:11, Friday 09 September 2016
H1 CDS (TCS)
david.barker@LIGO.ORG - posted 16:11, Friday 09 September 2016 - last comment - 16:34, Friday 09 September 2016(29577)
h1iopoaf0 stopped driving DACs again, caught this in time to stop TCS laser trips

at 22:15 UTS (15:15PDT) the h1iopoaf0 model detected both an ADC and a DAC error, resulting in zero'ed dac outputs. I restarted all the models within 10 minutes, which restored h1tcscs's control of the chiller setpoint DAC channels. The itmx laser temp had dropped from 23.25C to 21.5C in the 14 minutes which had elapsed, a rate of 0.14C/min

The IOPs STATE_WORD went from 512 (OVF) to 652 (ADC,DAC,DK,OVF)

We should schedule a complete power cycle of h1oaf0's IO Chassis to hard reset the 16bit DAC.

Comments related to this report
david.barker@LIGO.ORG - 16:34, Friday 09 September 2016 (29580)

here is a one hour plot of itmx DAC drive and laser temp for this event.

Images attached to this comment