SNS Epics Meeting November, 2000

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Presentation transcript:

SNS Epics Meeting November, 2000 New SNL Features SNS Epics Meeting November, 2000

New Features Manual: http://pipeline. keck. hawaii Runs on Unix (re)Implemented by William Lupton (KECK) Entry clause Exit clause Timer reset control Implemented by Greg White (SLAC)

State Structure State state_set_name { option option_list; entry { statement ... } when (expression) { statement ... } new_state_name exit { statement ... } }

State Options -e perform entry actions even if coming from the same state -x perform exit actions even if going to the same state -t do not reset the time for delays when re-entering the same state

Real-life Example with Entry and Exit state inj_ready { option -x; /* Execute exit clause every time */ entry { qs(3); NEW_STATE(Quiescent); MPG_SAFE } when (bbr_status < BBR_INJSAFE) { PUBLISH(“BaBar went UNSAFE”) SET_PUT(req_status_inject,0); } state inj_deny when(req_status_stop) { PUBLISH(“Already stopped”) } state inj_ready exit { taskDelay(1); CLEAR_REQS } }