def read(server,name):
try:
opc = OpenOPC.open_client('localhost')
opc.connect(server)
value, quality, time = opc.read(name)
access_rights=opc.properties(name, id=5)
opc.close()
value=str(value)
return value,quality,access_rights,time
except Exception:
opc.close()
return None,'Error',None,None
def read(server, name):
try:
opc = OpenOPC.open_client('localhost')
opc.connect(server)
value, quality, time = opc.read(name)
access_rights = opc.properties(name, id=5)
opc.close()
value = str(value)
return value, quality, access_rights, time
except Exception:
opc.close()
return None, 'Error', None, None
def write(server,name,value,response_array):
try:
opc = OpenOPC.open_client('localhost')
opc.connect(server)
#Write operation returns "success" if write is sucessful
if value:
a=opc.write((name,value))
else:
a=''#if user enters no value, no written operation is done
response_array.append(a.lower())
return response_array
except Exception:
response_array.append('error')
return (response_array)
def write(server, name, value, response_array):
try:
opc = OpenOPC.open_client('localhost')
opc.connect(server)
#Write operation returns "success" if write is sucessful
if value:
a = opc.write((name, value))
else:
a = '' #if user enters no value, no written operation is done
response_array.append(a.lower())
return response_array
except Exception:
response_array.append('error')
return (response_array)
