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Reports until 16:58, Tuesday 10 July 2018
H1 GRD (SEI)
thomas.shaffer@LIGO.ORG - posted 16:58, Tuesday 10 July 2018 (42847)
ISI HAM model restart causes Guardian chamber manager to be in unknown state

Immediately following the ISI model restart the HAM chamber mangers were cycling through states and giving their subordinates constant commands. The reason for this was that the managers were in the ISI_OFFLINE_HEPI_ON state before the restart, and after the restart the master switch is off. With the master switch off, the manager will run the INIT state to see where it should be to recover, but the INIT state was not really prepared for this situation.

The BSC managers have some code written to handle this situation of HEPI isolated, ISI offline with master switch off, but it doesn't quite do what I would expect. It will wait in the INIT state until the masterswitch is manually turned back on, then it will move through all of the states to get back to ISI_OFFLINE_HEPI_ON. I don't really think this is the best way to do it since it sounds like this has been the normal procedure for restarting models. For now, I basically copied what was in the BSC manager's INIT state into the HAM manager's, but we should think about changing this around in the future and maybe think how we want the SEI Guardian nodes to act on restarts.

I tested this on SEI_HAM2 and then loaded it into the other HAM managers.

Closing FRS11051

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