diff --git a/frappy_psi/thermofisher.py b/frappy_psi/thermofisher.py
index f160e06..9566385 100644
--- a/frappy_psi/thermofisher.py
+++ b/frappy_psi/thermofisher.py
@@ -32,17 +32,17 @@ class ThermFishIO(StringIO):
 
 class TemperatureLoopA10(HasConvergence, HasIO, Drivable):
     ioClass = ThermFishIO
+    value = Parameter('internal temperature', unit='degC')
     value = Parameter('temperature', unit='degC')
     target = Parameter('setpoint/target', datatype=FloatRange, unit='degC', default=0)
-    control_active = Parameter('circilation and control is on', BoolType(), default=False)
-    ctrlpars = StructParam('control parameters struct', dict(
-        p_heat = Parameter('proportional heat parameter', FloatRange()),
-        i_heat = Parameter('integral heat parameter', FloatRange()),
-        d_heat = Parameter('derivative heat parameter', FloatRange()),
-        p_cool = Parameter('proportional cool parameter', FloatRange()),
-        i_cool = Parameter('integral cool parameter', FloatRange()),
-        d_cool = Parameter('derivative cool parameter', FloatRange()),
-    ), readonly=False)
+    circ_on = Parameter('is circulation running', BoolType(), readonly=False, default=False)
+    # pids
+    p_heat = Parameter('proportional heat parameter', FloatRange(), readonly=False)
+    i_heat = Parameter('integral heat parameter', FloatRange(), readonly=False)
+    d_heat = Parameter('derivative heat parameter', FloatRange(), readonly=False)
+    p_cool = Parameter('proportional cool parameter', FloatRange(), readonly=False)
+    i_cool = Parameter('integral cool parameter', FloatRange(), readonly=False)
+    d_cool = Parameter('derivative cool parameter', FloatRange(), readonly=False)
 
     status_messages = [
         (ERROR, 'high tempr. cutout fault', 2, 0),