ISC length control offload path was added to HEPI-ETMX's model: h1hpietmx.mdl - See attached screenshot of the model.
The model was re-compiled and re-started - log attached.
DAC restart was required and performed by Dave.
Isolation and alignment offsets were turned back on, per the latest preferred configuration, and the ISC2CART matrix was updated. The outputs of the ISCMON block will be left off until ISC decides to try them.
Note: The signal offloaded to HEPI is the same as the one offloaded to SUS.
The new version of h1hpietmx.mdl was commited under the SVN -r6869
Work was performed under work permit # 4394 which is now closed.
Using a SUS control signal to drive HEPI will result in aliasing, since the SUS runs at a higher sampling rate than HEPI. This offload path should have its own IPC link, with an anti-aliasing filter installed on the sender.
also recall that drive in +x for HEPI ETMX will make the arm cavity longer, while the same signal applied to the mirror LONG input will probably make the cavity shorter, so watch the signs. ISC should pick a place to apply the signs so they get applied in a systematic way. I suggest that the ISC2CART matrix would make sense, and that a -1 in the LONG-in to X-out would make sense.