A. Pele, J. Kissel

After I had quickly glossed over the front-end model for the H1SUSOMC and declared it error-free, I sent Arnaud and Fil on a wild electronics goose chase for two hours before Arnaud came back in and found the flaw in the digital system in 5 minutes (cf LHO aLOG 8563). Mea cupla, gents. 

We've fixed the error in Simulink, and now that transfer functions are complete (see LHO aLOG 8565), I've re-compiled, re-installed, re-started, and re-stored (4R'd) the SUS to functionality. Further, I've confirmed the BIO monitor / readbacks work like a charm.

Next time, I'll follow Arnaud's advice: try to drive an offset out to the suspension and confirm no displacement from the OSEM speed-dials before declaring the BIO non-functional. My better judgment was polluted by too many encounters with turned off BIO drivers (which freezes their EPICs values), and the PUM driver low-voltage problem (see LHO aLOG 1278).