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import sys
import time
import epics
import pvnames
pvn = pvnames.alarm_pv
pvn = pvnames.alarm_comp
pvn = pvnames.alarm_trippoint
def alarmHandler(pvname=None,value=None,char_value=None,
comparison=None,trip_point=None,**kw):
sys.stdout.write( 'Alarm! %s at %s ! \n' %( pvname, time.ctime()))
sys.stdout.write( 'Alarm Comparison =%s \n' %( comparison))
sys.stdout.write( 'Alarm TripPoint =%s \n' %( repr(trip_point)))
sys.stdout.write( 'Current Value =%s \n' %(char_value))
epics.Alarm(pvname = pvnames.alarm_pv,
comparison = pvnames.alarm_comp,
trip_point =pvnames.alarm_trippoint,
callback = alarmHandler,
alert_delay=5.0)
t0 = time.time()
sys.stdout.write('Waiting for pv %s to change! \n' % pvnames.alarm_pv)
sys.stdout.write('Alarm settings: comp=%s, trip_point=%s\n' % (pvnames.alarm_comp,
pvnames.alarm_trippoint))
sys.stdout.write('You may have to make this happen!!\n')
while time.time()-t0 < 30:
try:
epics.ca.poll()
except KeyboardInterrupt:
break
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