Data Acquisition Control.

ABORT ABORT_POSTCMD ABORT_PRECMD AUTOUPDATE BEAMLINE_PAR BEGIN BEGIN_POSTCMD BEGIN_PRECMD CHANGE CHANGE_FINISH CHANGE_MONITOR CHANGE_PERIODS CHANGE_START CHANGE_SYNC CHANGE_TABLES CHANGE_TCB CHANGE_VARS CHANGE_VETOS DAE_WRITE END END_POSTCMD END_PRECMD GETFRAMES GETMEVENTS GETPERIOD GETRUNNUMBER GETRUNSTATE GETTOTALCOUNTS GETUAMPS LOADSCRIPT PAUSE PAUSE_POSTCMD PAUSE_PRECMD RECOVER RESUME RESUME_POSTCMD RESUME_PRECMD SAMPLE_PAR SET_FERMI_VETO SETSCRIPTDIR SETSCRIPTNAME SNAPSHOT_CRPT STORE SUM_ALL_DAE_MEMORY SUM_ALL_SPECTRA UPDATE UPDATESTORE USER_DETAILS WAITFOR WAITFORDASHRUNSTATE

CHANGE_SYNC ( Qualifier  ISIS, Qualifier  INTERNAL, Qualifier  SMP   ) Change DAE timing (sync) source as part of a block change operation. Block change operations are enclosed by CHANGE_START and CHANGE_FINISH commands. Parameters: [in]  INTERNAL  use internal (test clock) frame sync [in]  ISIS  Use ISIS as the timing source [in]  SMP  Use SMP (the chopper) Precondition: A previous CHANGE_START command been issued