diff --git a/frappy/mixins.py b/frappy/mixins.py
index 4fadd6a..12075f0 100644
--- a/frappy/mixins.py
+++ b/frappy/mixins.py
@@ -38,6 +38,8 @@ class HasControlledBy:
 
         :param name: the name of the module (for controlled_by enum)
         :param deactivate_control: a method on the input module to switch off control
+
+        called by <controller module>.initModule
         """
         if not self.inputCallbacks:
             self.inputCallbacks = {}
@@ -75,7 +77,7 @@ class HasOutputModule:
     """mixin for modules having an output module
 
     in the :meth:`write_target` the hardware action to switch to own control should be done
-    and in addition self.activate_output() should be called
+    and in addition self.activate_control() should be called
     """
     # mandatory=False: it should be possible to configure a module with fixed control
     output_module = Attached(HasControlledBy, mandatory=False)
@@ -105,7 +107,10 @@ class HasOutputModule:
         self.set_control_active(True)
 
     def deactivate_control(self, source=None):
-        """called when an other module takes over control"""
+        """called when another module takes over control
+
+        registered to be called from the controlled module(s)
+        """
         if self.control_active:
             self.set_control_active(False)
             self.log.warning(f'switched to manual mode by {source or self.name}')
diff --git a/frappy_psi/convergence.py b/frappy_psi/convergence.py
index 9c5d616..0ef4918 100644
--- a/frappy_psi/convergence.py
+++ b/frappy_psi/convergence.py
@@ -176,7 +176,7 @@ class HasConvergence:
 
     def convergence_interrupt(self, state):
         """stopping"""
-        self.__set_status(state.stop_status)  # stop called
+        self.__set_status(*state.stop_status)  # stop called
         return self.convergence_instable
 
     def stop(self):
@@ -196,3 +196,4 @@ class HasConvergence:
         if self.pollInfo:
             self.pollInfo.trigger(True)
         return value
+