Added alarms

Change-Id: Idd06278e44e01522ddf904b56a452ce8c704b5a6

cfg/ls340_cfg.py

@@ -2,6 +2,7 @@ Node('ls340test.psi.ch',
      'ls340 test',
      'tcp://5000',
 )
+
 Mod('io',
     'frappy_psi.lakeshore.Ls340IO',
     'communication to ls340',

frappy_psi/lakeshore.py

@@ -22,7 +22,8 @@ from math import log2
 
 from frappy.core import Readable, Parameter, IntRange, EnumType, FloatRange, \
     StringIO, HasIO, StringType, Property, Writable, Drivable, IDLE, ERROR, \
-    Attached, StructOf
+    Attached, StructOf, WARN
+
 from frappy_psi.mixins import HasOutputModule, HasControlledBy
 
 
@@ -45,14 +46,16 @@ class LakeShore(HasIO):
         return [float(num) for num in reply.split(',')]
 
 
-class Sensor340(HasIO, Readable):
+class Sensor340(LakeShore, Readable):
     """A channel of 340TC"""
 
     # define the communication class to create the IO module
     ioClass = Ls340IO
-
     channel = Property('lakeshore channel', StringType())
-    # define or alter the parameters
+    # relay_mode = Property('relay setting mode', IntRange(0, 2))
+    # relay = Property('relay high/low', IntRange(1, 2))
+    alarm = Parameter('alarm limits', FloatRange(unit='K'), readonly=False)
+    # # define or alter the parameters
     # as Readable.value exists already, we give only the modified property 'unit'
     value = Parameter(unit='K')
 
@@ -70,18 +73,27 @@ class Sensor340(HasIO, Readable):
             return ERROR, 'temperature overrange'
         if c >= 16:
             return ERROR, 'temperature underrange'
-        # do not check for old reading -> this happens regularely on NTCs with T comp
+        # do not check for old reading -> this happens regularly on NTCs with T comp
         if c % 2:
             return ERROR, 'invalid reading'
+        # ask for high alarm status and return warning
+        if '1' in str(self.communicate(f'ALARMST? {self.channel}')):
+            return Warning
         return IDLE, ''
 
+    def write_alarm(self):
+        return self.set_par(f'ALARM {self.channel}, 1, 1, {self.alarm}, 0, 0, 2')
+
+    def read_alarm(self):
+        return self.get_par(f'ALARM? {self.channel}')[0]
+
 
 class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
-    loop = Property('lakeshore loop', IntRange(1, 2), default=1)
-    channel = Property('attached channel', StringType())
     max_power = Parameter('max heater power', datatype=FloatRange(0, 100), unit='W', readonly=False)
     value = Parameter('heater output', datatype=FloatRange(0, 100), unit='W')
     target = Parameter('manual heater output', datatype=FloatRange(0, 100), unit='W')
+    loop = Property('lakeshore loop', IntRange(1, 2), default=1)
+    channel = Property('attached channel', StringType())
     resistance = Property('heater resistance', datatype=FloatRange(10, 1000))
     current = Property('heater current', datatype=FloatRange(0, 2))
     _range = 0
@@ -120,7 +132,8 @@ class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
         self._range = irange
         self.communicate(f'CLIMIT {self.loop},{self.SETPOINTLIMS},0,0,{icurrent},{irange};'
                          f'RANGE {irange};'
-                         f'CDISP {self.loop},1,{self.resistance},0;RANGE?')
+                         f'CDISP {self.loop},1,{self.resistance},0;RANGE?;'
+                         f'RELAY? 1') #only high relay
         return self.read_max_power()
 
     def read_max_power(self):
@@ -142,9 +155,6 @@ class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
     def power_to_percent(self, power):
         return (power / self._max_power) ** (1 / 2) * 100  # limit
 
-    def read_value(self):
-        return self.percent_to_power(float(self.communicate(f'HTR?')))
-
     def read_status(self):
         return self.STATUS_MAP[int(self.communicate(f'HTRST?'))]
 
@@ -162,6 +172,9 @@ class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
                          f'CMODE {self.loop}, {int(mode)};'
                          f'RANGE?')
 
+    def read_value(self):
+        return self.percent_to_power(float(self.communicate(f'HTR?')))
+
 
 class TemperatureLoop340(HasOutputModule, Sensor340, Drivable, LakeShore):
     target = Parameter(unit='K')
@@ -196,3 +209,5 @@ class TemperatureLoop340(HasOutputModule, Sensor340, Drivable, LakeShore):
 
 
 
+
+