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H1 CDS

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david.barker@LIGO.ORG - posted 16:46, Monday 01 December 2025 - last comment - 16:56, Monday 01 December 2025(88292)

h1susey upgrade to LIGO-DACs

Richard, Jonathan, Fil, Marc, Daniel, EJ, Jeff, Oli, Ryan S, Dave:

h1susey was upgraded from Gen Std DACs (3x18bit, 2x20bit) to 2 LIGO-DACs.

Fil upgraded the three AI chassis to use the new SCSI interface board.

We removed the old Gen Std DACs and installed the two new LIGO-DACs.

The first LIGO-DAC drives the first standard AI, which in turn daisy-chain drives the second standard AI.

The second LIGO-DAC drives the special PI AI chassis.

After the hardware was changed the new h1iopsusey, h1susetmy, h1sustmsy and h1susetmypi models were rev-lock built and installed. A common model change for h1susetmy was accepted for its build.

EJ did a custom build for h1iopsusey due to rev-update issues found for watchdog source files. The user models were built with the production RCG-5.5.2

Following the model starts, the DAQ was restarted for new INI files due to removed DACs in h1iopsusey and h1susetmy.

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jonathan.hanks@LIGO.ORG - 16:56, Monday 01 December 2025 (88295)

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With the daqd restarts we made a few changes.

This is the first restart with the daqd0 leg re-configured
- Updated the restart scripts for the 0 leg to restart fw0 first and then the rest (tw0, nds0, gds0)
- Updated the pause between starting fw0 and starting the other systems as the fw takes longer to start up.
Removed a old compatibility flag from the daqdrc on fw0 and fw1.
- Removed the "USE_BROKEN_CONFIGURATION_NUMBER_HASH" line. This is only needed for compatibility with older daqds and can be turned off if it is turned off on all daqd fw systems at the same time. This deals with how the configuration hash is created, this hash value represents the channel list. The hash is then sent to the run number server to get the configuration/run number to put in the frame.
Removed 8 channels from the GDS broadcaster list.
- H1:FEC-98_DAC_OVERFLOW_ACC_2_[0,1,2,3]
- H1:FEC-98_DAC_OVERFLOW_ACC_3_[1,2,3,4]

We did two restart passes as h1susetmypi needed an updated to deal with DAC changes.