corey.gray@LIGO.ORG - posted 05:31, Tuesday 13 December 2016 - last comment - 01:34, Wednesday 14 December 2016(32498)
EX/EY ECATPLC2: OBSERVING Drop Due To ALS Changes--->More Channels to UNMONITOR!
Since the start of O2, we have had some pesky dropouts of OBSERVING due to SDF channel changes for some ALS channels from a Beckhoff computer at each of our End Stations (sysecatx1plc2 & sysecaty1plc2). Below, I wanted to list each of the occassions, the amount of time we were out of Science mode, channels involved, and their current state.
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12/3: 8min Out of OBSERVING (Corey Alog)
-
Due to the following & UNMONITORED the following:
- H1:ALS-X_FIBR_SERVO_IN1GAIN
- H1:ALS-X_FIBR_LOCK_TEMPERATURECONTROLS_ERRORSIGNAL
- H1:ALS-X_FIBR_LOCK_TEMPERATURECONTROLS_POLARITY
-
Due to the following & UNMONITORED the following:
-
12/3: 1min Out of OBSERVING (Ed Alog)
- Due to following & UNMONITORED: H1:ALS-X_FIBR_LOCK_TEMPERATURECONTROLS_ON
-
12/10: 5min Out of OBSERVING (Cheryl Alog)
- Due to H1:ALS-Y_FIBR_LOCK_TEMPERATURECONTROLS_ON
-
12/11: 8min Out of OBSERVING. (Cheryl Alog)
- Due to the following & UNMONITORED: H1:ALS-Y_FIBR_LOCK_TEMPERATURECONTROLS_ON
Should UNMONITOR (3) ALS-Y Channels
Above we can see all of the channels we noticed/caught/UNMONITORED. I would suggest we take the preemptive action of UNMONITORING (if not already done so) the following channels for sysecaty1plc2 next time we are out of OBSERVING:
- H1:ALS-Y_FIBR_SERVO_IN1GAIN
- H1:ALS-Y_FIBR_LOCK_TEMPERATURECONTROLS_ERRORSIGNAL
- H1:ALS-Y_FIBR_LOCK_TEMPERATURECONTROLS_POLARITY
Done.
Filed an FRS for this (#6932). I CLOSED it, but there is always the possibility that rogue channels which haven't been addressed can drop us out in the future.