dry_run = False
do_elog = True

if get_exec_pars().source == CommandSource.ui:
    bph_ref_user   = 89.0
    plt            = None
else:
    bph_ref_user   = args[0]
    plt            = args[1]
phase_offset_old   = caget("SINEG01-RSYS:SET-VSUM-PHASE-OFFSET-BASE")
phase_offset_new   = phase_offset_old - (bph_ref_user - 90.0)
if not dry_run:
    caput("SINEG01-RSYS:SET-VSUM-PHASE-OFFSET-BASE"    , phase_offset_new      )
if do_elog:
    title = "Set gun phase"
    log_msg = "SINEG01-RSYS:SET-VSUM-PHASE-OFFSET-BASE: %8.2f" % phase_offset_new + " deg        (was %8.2f" % phase_offset_old   + " deg)\n"
    attachments = []
    if plt is not None:
        sleep(0.1) #Give some time to plot to be finished - it is not sync  with acquisition
        file_name = os.path.abspath(get_context().setup.getContextPath() + "/GunEnergyScanRfSet.png")
        plt.saveSnapshot(file_name , "png")
        attachments = [file_name]
    elog(title, log_msg, attachments)
show_message("Success setting phase reference")