Reports until 18:06, Thursday 05 December 2013
H1 CDS
david.barker@LIGO.ORG - posted 18:06, Thursday 05 December 2013 - last comment - 10:40, Friday 06 December 2013(8846)
DAQ problem with HEPI ITMY slow channels

Hugh noticed that some HEPI ITMY slow channels were not correct in the DAQ. I did some investigation and found:

Of the slow channels (datarate=16) in H1ISIITMY.ini :

channels associated with the FEC were correct

channels associated with Filter Modules were correct

other slow channels were incorrect, either showing zero or other data (like channel hopping)

Fast channels appear to be OK (within the limited sample I used)

The problem is not seen with HEPI BS or ETMX. Looking at the models they all look identical.

Reboot/Restarts:

I first restarted h1hpiitmy. Then tried restarting all models on h1seib1. Then tried a restart of the mx-streamers. Then recompiled and reinstalled the h1hpiitmy model and restarted it, followed by a DAQ restart (DAQ status was good, so this should have been unnecessary). All to no avail.

The only thing I haven't done is reboot the computer.

It appears this problem appeared when we upgraded to RCG2.8 on Tue 12 November.

Comments related to this report
keith.thorne@LIGO.ORG - 06:57, Friday 06 December 2013 (8853)
Link 

We'll have to look at those channels here at LLO (once I figure out which ones they are...).
A contributing factor may be that mx_stream driver update was not explicitly listed in the RCG 2.8 upgrade instructions.  There were changes from 2.7.2 (but none appear linked to 2.8).  This driver can be updated now, but would require mx_stream restarts (or even front-end restarts to load new kernel image).
keith.thorne@LIGO.ORG - 10:40, Friday 06 December 2013 (8861)
Link 

Celine has checked some of those channels here at LLO and is not seeing the same issue, either on MEDM screens or values on the DAQ.