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shutters.py 3.15 KiB
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"""
main shutter and branch shutter functions
"""
from time import sleep
from epics import caget, caput

from .utilities import dateandtime, print_warning_message


##############################################################################################################
################################             main shutter             ##############################
##############################################################################################################

def main_shutter_open():
    """
    opens the main shutter

    Previously: Open_MainShutter 
    """
    caput("PC:29ID:FES_OPEN_REQUEST.VAL",1, wait=True,timeout=180000)
    print("Opening Main Shutter...")

def main_shutter_close():
    """
    closes the main shutter

    Previously: Close_MainShutter
    """
    caput("PC:29ID:FES_CLOSE_REQUEST.VAL",1,wait=True,timeout=18000)
    print("Closing Main Shutter...")

def main_shutter_status():
    """
    checks on the status of the main shutter
    and returns shutter_open = True / False

    """
    SS1=caget("EPS:29:ID:SS1:POSITION")
    SS2=caget("EPS:29:ID:SS2:POSITION")
    PS2=caget("EPS:29:ID:PS2:POSITION")
    check=SS1*SS2*PS2

    if check == 8:
        shutter_open = True
    else:
        shutter_open = False
    
    return shutter_open


def main_shutter_check_open():
    """
    Checks main shutter is open, if not opens it"
    
    Previously: Check_MainShutter
    """
    while True:
        shutter_open = main_shutter_status()
        if shutter_open == False:
            print("MAIN SHUTTER CLOSED !!!" , dateandtime())
            main_shutter_open()
            sleep(10)
        else:
            print("Shutter is now open" , dateandtime())
            break
##############################################################################################################
################################             branch shutters            ##############################
##############################################################################################################

def branch_shutter_status(branch,verbose=False):
    """
    checks on the status of the main shutter
    and returns shutter_open = True / False
    """
    pvA="PA:29ID:S"+branch+"S_BLOCKING_BEAM.VAL"
    pvB="PB:29ID:S"+branch+"S_BLOCKING_BEAM.VAL"
    #"ON" = 1 => shutter open
    status=caget(pvA)+caget(pvA)
    if status == 2:
        shutter_open=True
    else:
        shutter_open=False

    if verbose:
        status = 'Open' if shutter_open else 'Closed'
        print(branch+"-shutter is "+status)
    return shutter_open

def branch_shutter_close(branch):
    """
    closes current branch shutter

    Previously: Close_BranchShutter
    """
    caput("PC:29ID:S"+branch+"S_CLOSE_REQUEST.VAL",1,wait=True,timeout=18000)
    print("Closing "+branch+"-Shutter...")


def branch_shutter_open(branch):
    """
    Opens current branch shutter 

    Previoulsy: Open_BranchShutter

    """
    shutter_status = branch_shutter_status
    if shutter_status:
        print(branch+"-Shutter already open...")
    else:
        caput("PC:29ID:S"+branch+"S_OPEN_REQUEST.VAL",1,wait=True,timeout=18000)
        print("Opening "+branch+"-Shutter...")