def waitForSettle(self):
current = tagClient.readTag([self.regItag])
if abs(current) < .01:
self.connected = self.disconnect()
else:
now = datetime.now()
Core.schedule(now + timedelta(seconds=1), self.waitForSettle)
def ramp(self, setpoint, maxStep=.5, disconnectWhenFinished=False):
tag = self.pSetpointTag
currentSetpoint = tagClient.readTags([tag])
diff = setpoint - currentSetpoint
if diff > maxStep:
currentSetpoint += maxStep
elif diff < -maxStep:
currentSetpoint -= maxStep
else:
currentSetpoint += diff
tagClient.writeTags([tag], [currentSetpoint])
if abs(diff) > .001:
#schedule a callback, allowing some time for actuation
sched = datetime.now() + timedelta(seconds=1.5)
Core.schedule(sched, self.ramp)
print("{me} is scheduling another ramp call: {cs}".format(
me=self.channelNumber, cs=currentSetpoint))
if disconnectWhenFinished == True and setpoint == 0:
print("ramp with disconnect completed, disconnecting {me}".
format(me=self.channelNumber))
self.disconnect()
else:
print("{me} is done ramping to {set}".format(me=self.name,
set=setpoint))
def disconnectSoft(self):
#change setpoint to zero
tagClient.writeTags([self.pSetpointTag], [0])
#callback and keep calling back until the current is almost zero
now = datetime.now()
Core.schedule(now + timedelta(seconds=1), self.waitForSettle)