restructured PVAdjustable and PVEnumAdjustable sucht that units are read from the unterlying PV

slic/core/adjustable/pvadjustable.py

@@ -7,14 +7,15 @@ from .adjustable import Adjustable
 class PVAdjustable(Adjustable):
 
     def __init__(self, pvname_setvalue, pvname_readback=None, accuracy=None, name=None):
-        name = name or pvname_setvalue
-        super().__init__(name)
-
-        self.accuracy = accuracy
-
         pv_setvalue = PV(pvname_setvalue)
         pv_readback = PV(pvname_readback) if pvname_readback else pv_setvalue
 
+        name = name or pvname_readback or pvname_setvalue
+        units = pv_readback.units
+        super().__init__(name=name, units=units)
+
+        self.accuracy = accuracy
+
         self.pvnames = SimpleNamespace(
             setvalue = pvname_setvalue,
             readback = pvname_readback

slic/core/adjustable/pvenumadjustable.py

@@ -7,12 +7,14 @@ from .adjustable import Adjustable
 class PVEnumAdjustable(Adjustable):
 
     def __init__(self, pvname, name=None):
-        name = name or pvname
-        super().__init__(name)
-
         self.pvname = pvname
-        self.pv = PV(pvname)
-        self.states = Enum(self.pv.enum_strs)
+        self.pv = pv = PV(pvname)
+
+        name = name or pvname
+        units = pv.units
+        super().__init__(name=name, units=units)
+
+        self.states = Enum(pv.enum_strs)
 
 
     def get_current_value(self, as_number=False):