aLIGO LHO Logbook

H1 CDS (PSL)

david.barker@LIGO.ORG - posted 12:51, Wednesday 06 November 2013 - last comment - 11:06, Thursday 07 November 2013(8400)

Restarted h1psl0 after crash

Sheila, Richard, Jim, Patrick, Dave

Commissioning work on the rotation stage controller caused a 24VDC power glitch to the h1psl0 IO Chassis at 10:55 local time today. The FE computer did not crash, it allowed us to log in and verify that no ADC/DAC cards were visible via the One Stop system.

We powered down the FE computer, power cycled the IO Chassis, powered up the FE computer. When the models auto started with their safe.snap epics settings restored the PSL camera images all went blank due to a shutter closure in the Diode Room. We had seen this before and now know the recovery. On the PSL_LASER MEDM screen, the "External Shutter Request" section, the "Flow sensor" must be set to OPEN by pressing the small RESET button immediately below it. Only when all the requests are GREEN can the main RESET button be pressed. At that point a reset button has to be pressed on the Beckhoff controls system. At the moment this requires someone going into the Diode Room and pressing the button on the Beckhoff PC console. We should set up remote desktop to allow this from the control room.

The safe.snap settings do not appear to be correct. Sheila burt restored ISS, FSS and PMC from 23:00 27th Oct and the upper right video image came to life (PMC refl). But the PMC is not currently locking.

Comments related to this report

patrick.thomas@LIGO.ORG - 11:06, Thursday 07 November 2013 (8419)CDS, IOO, PSL

Link

The two long cables for the IOO rotation stage were run early this week from the H1 PSL ENV Beckhoff chassis in the CER to the H1 PSL racks in the LVEA. At the same time Thomas V. and I moved the rotation stage and interface box from the CER to next to the H1 PSL racks. We reconnected them to these cables and continued testing there. Yesterday I wanted to try a different interface box. I disconnected the rotation stage from it (to avoid damaging the stage). I left the break out board on the end of the cable and removed the rotation stage from it. I then swapped the cables over to the other interface box, but did not reattach the rotation stage. I should have turned off the Beckhoff chassis first. I went back into the CER and saw the lights off on the Beckhoff chassis. I tried rocking the power switch, and the lights flashed briefly and then it wouldn't toggle anymore. It appears I tripped a breaker and took out the H1 PSL IO chassis which is in the same rack. It may be possible that the breakout board shorted out on the metal table it was sitting on, but I don't know.

Richard pulled the Beckhoff chassis out, replaced something, and put it back. It appears to be working again.