J. Kissel, J. Betzwieser

Joe had uncovered a particularly nasty bug in the wiring of the CAL-CS front end model's reproduction of the digital actuation chain in the SUS (see LHO aLOG 18465). He's committed a bug fix, I've svn up'd and recompiled, reinstalled, restarted, and restored the front end code with the new fix.

Details:
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As you know, in the suspensions, one has the ability to choose between a distributed and offloaded hierarchy for the actuation. In the CAL-CS model, a stripped-down, longitudinal-only version of this hierarchy option has been installed such that we can exactly replicate what's been installed in the actual SUS hierarchy for the DARM / DELTA L calibration. As Joe says,
"At some point the tag coming from the LOCK_L3 output (shown in magenta) and the L3_ISCINF output (shown in orange) had been switched"
which causes indescribably confusing things to happen with the hierarchical control (at least not without a serious exercise in loop math). The two attachments show the before and after.

Yikes! Good catch Joe!