attenuator setup channels for factor and thickness to be displayed in daiquiri

id26/controllers/attenuator.py

 from bliss.scanning.scan_meta import get_user_scan_meta
-
+from bliss.config.channels import Cache
 '''
 class: ID26attenuator
 package: id26.controllers.attenuator
@@ -27,6 +27,12 @@ class ID26Attenuator:
         self.wkey = config_dict['wago_logical_name']
         self.unit = float(config_dict ['attenuation_unit'])
         self.filters = config_dict['filters']
+
+        self.__factor = Cache(self, "factor", default_value=0)
+        self.__thickness = Cache(self, "thickness", default_value=0)
+
+        self.factor()
+        self.thickness()
         
         self._init_meta_data_publishing()
 
@@ -69,22 +75,22 @@ class ID26Attenuator:
 
         return (msg)
      
-
+   
     def factor (self, value = None):
         if value != None:
             register = list(map(int,' '.join(bin(value)[2:].rjust(len(self.filters),'0')[::-1]).split()))       
             self.wago.set (self.wkey, register)
         register = self.wago.get(self.wkey)
         factor = int(''.join(list(map(str,register)))[::-1], base=2)
-        
+        self.__factor.value = factor        
         return factor
     
     def thickness (self, value = None):
         if value != None:
             newvalue = int(value/self.unit)
             self.factor(newvalue)
-        value = self.unit*self.factor() 
-            
+        value = self.unit*self.factor()
+        self.__thickness.value = value        
         return value
 
     def insert (self, *channel):