Reports until 09:09, Tuesday 16 December 2025
H1 SUS
jeffrey.kissel@LIGO.ORG - posted 09:09, Tuesday 16 December 2025 (88540)
SUS MC1, MC3, PRM, and PR3 Online and Running post sush2a and sush2b merge to sush12
J. Kissel, O. Patane

We've recovered all damping and alignment functionality for H1SUSMC1, H1SUSMC3, H1SUSPRM, and H1SUSPR3  (including turning on L, P. and Y Estimators for PR3); the HAM {Small, Large} Triple Suspensions (HXTS, HSTS, HLTS) on HAM2 after their host computer changed from h1sush2a to h1sush12 and their DACs were upgraded to a 32CH 28-bit LIGO DAC (see analog changes in LHO:88519 and software changes in LHO:88527).

The recovery was relatively simple for these suspensions:
- Untripped the software watchdogs for these HAM2 suspensions (H1:IOP-SUS_MC1_DACKILL_RESET, H1:IOP-SUS_MC3_DACKILL_RESET, H1:IOP-SUS_PRM_DACKILL_RESET, H1:IOP-SUS_PR3_DACKILL_RESET) and the HAM2 seismic system beneath it (H1:IOP-SEI_HAM2_DACKILL_RESET).
- Used SEI_HAM2 guardian to bring HAM2 SEI system to ISI_DAMPED_HEPI_OFFLINE (from them having had their watchdogs trip overnight).
- Left / made sure that SUS Guardians in SAFE and unmanaged
- Added a gain of 2^10 = 1024x in the COILOUTF banks in FM10 to compensate for the 18-bit DAC to 28-bit 
- Turned off inputs to the COILOUTF, untripped watchdogs, turned MASTER SWITCH ON
- Added small 5 count offsets in COILOUTF, one-at-a-time, and sorted out the MEDM overview macro files***
    - lower masses needed adjusted due to the consolidation of DACs
    - Computer name changed from h1sush2a to h1sush12
- Tested functionality of binary IO by switching H1:SUS-{MC1,MC3,PRM,PR3}_BIO_{M1,M2,M3}_STATEREQ into various states confirming that the read backs switch correctly (and at this point, we just assume that the binary OUT is actually switching the coil drivers).
- With the SUS guardian still in SAFE, and the MASTER SWITCH still ON, and watching the top mass OSEMs on ndscope ^^^, 
    - Turned on damping loops one DOF at a time, to confirm that resonant motion exponentially decays as expected without any saturation (reminding ourselves that the DAC saturation limit is now +/-2^27 = +/- 134217728 [DAC ct]_{peak})
    - Turned on alignment offsets to see a significant shift in top mass
- Seeing no issue, used the SUS guardian to bring the suspension to ALIGNED, then back to SAFE, then back to ALIGNED.

*** The MEDM overview macro files are 
    /opt/rtcds/userapps/release/sus/common/medm/
        susmc1_overview_macro.txt
        susmc3_overview_macro.txt
        susprm_overview_macro.txt
        suspr3_overview_macro.txt

^^^ Handy ndscope command line to quickly switch between 'scopes of the top mass EULER basis report of OSEM motion
    $ optic=MC1;ndscope -k H1:SUS-${optic}_M1_DAMP_{L,P,Y}_IN1_DQ &