Reports until 11:56, Monday 27 October 2014
H1 CDS
david.barker@LIGO.ORG - posted 11:56, Monday 27 October 2014 (14639)
h1seih45 DAC drives on IOP failed, required IOP restart

Jim, Dave, Hugo

at 08:03PDT Sunday Morning, 26th Oct 2014 the h1iopseih45 dac-enable was unset (8th bit of h1iopseih45 STATE_WORD). From this point onwards until the h1iopseih45 was restarted this morning no DAC drives were being sent out of this front end. This is presumably a DAC FIFO error, similar to previous such events. We are seeing them roughly once a month.