if get_exec_pars().source == CommandSource.ui:
    ID_ENERGY = 1250
    HALFWIDTH = 10
    STEP = 0.5
    MODE = "Manual"

DRY_MODE = True

 
try:
    if not DRY_MODE:
        caput('X07MA-PHS-E:OPT', 'PGM')        
        energy_id.write(ID_ENERGY)    
        wait_device(energy_done, 1 )
        sensors = [signal_i0, signal_tey, 'ca://X07MA-PC-K428:2:getTotalGain', energy]
        
        if MODE =="C+":
            set_pol_cplus()
        if MODE =="C-":
            set_pol_cminus()
        if MODE == "LH":
            set_pol_lin(0.0)                 
        elif MODE == "LV":
            set_pol_lin(90.0)    
        current_offset = pol_offset.take()             
       
    else: 
        sensors = [sin, energy]
        current_offset = 0.0
        
    ret = lscan(energy, sensors, ID_ENERGY-HALFWIDTH, ID_ENERGY+HALFWIDTH, STEP, latency = 0.3)
    
    xdata = ret.getPositions(0)
    ydata = ret.getReadable(0)
    ymin = min(ydata)
    e0 = xdata[ydata.index(min(ydata))]
    new_offset =ID_ENERGY - e0 + current_offset
    print "E0=",e0," ymin=",ymin," Offset=",new_offset
      
    set_return(new_offset)
    
except:   
    print("Aborting...") 
    raise
finally:    
    if not DRY_MODE:
        caput('X07MA-PHS-E:OPT', 'PGM+ID')