diff --git a/doc/revpimodio2.device.html b/doc/revpimodio2.device.html
index 278215b..5ca0a6f 100644
--- a/doc/revpimodio2.device.html
+++ b/doc/revpimodio2.device.html
@@ -788,13 +788,16 @@ True, wenn Device vorhanden
 </dl><a NAME="DeviceList.__delattr__" ID="DeviceList.__delattr__"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 DeviceList.__delattr__</h3>
-<b>__delattr__</b>(<i>key</i>)
+<b>__delattr__</b>(<i>key, delcomplete=True</i>)
 <p>
 Entfernt angegebenes Device.
 </p><dl>
 <dt><i>key</i></dt>
 <dd>
 Device zum entfernen
+</dd><dt><i>delcomplete</i></dt>
+<dd>
+Wenn True wird Device komplett entfernt
 </dd>
 </dl><a NAME="DeviceList.__delitem__" ID="DeviceList.__delitem__"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
diff --git a/revpimodio2.e4p b/revpimodio2.e4p
index 0d6bbb2..69e2cb4 100644
--- a/revpimodio2.e4p
+++ b/revpimodio2.e4p
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE Project SYSTEM "Project-5.1.dtd">
 <!-- eric project file for project revpimodio2 -->
-<!-- Saved: 2017-11-01, 15:30:36 -->
+<!-- Saved: 2017-11-02, 13:54:10 -->
 <!-- Copyright (C) 2017 Sven Sager, akira@narux.de -->
 <Project version="5.1">
   <Language>en_US</Language>
@@ -354,7 +354,7 @@
               <string>ExcludeFiles</string>
             </key>
             <value>
-              <string>*/test/*,*/setup.py</string>
+              <string>*/test/*,*/setup.py,*/test_unit.py</string>
             </value>
           </dict>
         </value>
diff --git a/revpimodio2/device.py b/revpimodio2/device.py
index e039eec..11a0ea1 100644
--- a/revpimodio2/device.py
+++ b/revpimodio2/device.py
@@ -29,23 +29,35 @@ class DeviceList(object):
         else:
             return key in self.__dict_position.values()
 
-    def __delattr__(self, key):
+    def __delattr__(self, key, delcomplete=True):
         """Entfernt angegebenes Device.
-        @param key Device zum entfernen"""
-        dev_del = getattr(self, key)
+        @param key Device zum entfernen
+        @param delcomplete Wenn True wird Device komplett entfernt"""
+        if delcomplete:
+            # Device finden
+            if type(key) == int:
+                dev_del = self.__dict_position[key]
+                key = dev_del._name
+            else:
+                dev_del = getattr(self, key)
 
-        # Reinigungsjobs
-        dev_del.autorefresh(False)
-        for io in dev_del:
-            delattr(dev_del._modio.io, io._name)
+            # Reinigungsjobs
+            dev_del.autorefresh(False)
+            for io in dev_del:
+                delattr(dev_del._modio.io, io._name)
 
-        del self.__dict_position[dev_del._position]
-        object.__delattr__(self, key)
+            # Device aus dict löschen
+            del self.__dict_position[dev_del._position]
+
+        if hasattr(self, key):
+            object.__delattr__(self, key)
 
     def __delitem__(self, key):
         """Entfernt Device an angegebener Position.
         @param key Deviceposition zum entfernen"""
-        self.__delattr__(self[key]._name)
+        if issubclass(type(key), Device):
+            key = key._position
+        self.__delattr__(key)
 
     def __getitem__(self, key):
         """Gibt angegebenes Device zurueck.
diff --git a/revpimodio2/io.py b/revpimodio2/io.py
index 833e9de..c7a6a0f 100644
--- a/revpimodio2/io.py
+++ b/revpimodio2/io.py
@@ -674,7 +674,19 @@ class IOBase(object):
                     self._parentdevice._position, self._parentdevice._name
                 )
             )
-
+        if not (RISING <= edge <= BOTH):
+            raise AttributeError(
+                "parameter 'edge' must be revpimodio2.RISING, "
+                "revpimodio2.FALLING or revpimodio2.BOTH"
+            )
+        if not (exitevent is None or type(exitevent) == Event):
+            raise AttributeError(
+                "parameter 'exitevent' must be <class 'threading.Event'>"
+            )
+        if type(timeout) != int or timeout < 0:
+            raise AttributeError(
+                "parameter 'timeout' must be <class 'int'> and greater than 0"
+            )
         if edge != BOTH and self._bitaddress < 0:
             raise AttributeError(
                 "parameter 'edge' can be used with bit Inputs only"
diff --git a/revpimodio2/modio.py b/revpimodio2/modio.py
index 8b60ea4..8aba70e 100644
--- a/revpimodio2/modio.py
+++ b/revpimodio2/modio.py
@@ -172,7 +172,7 @@ class RevPiModIO(object):
             else:
                 # Device-Type nicht gefunden
                 warnings.warn(
-                    "device type {} unknown",
+                    "device type '{}' unknown".format(device["type"]),
                     Warning
                 )
                 dev_new = None
@@ -193,7 +193,7 @@ class RevPiModIO(object):
 
         # Namenszugriff zerstören, wenn doppelte Namen vorhanden sind
         for errdev in err_names:
-            delattr(self.device, errdev)
+            self.device.__delattr__(errdev, False)
             warnings.warn(
                 "equal device name in pictory configuration. can not "
                 "build device to access by name. you can access all devices "
@@ -364,6 +364,7 @@ class RevPiModIO(object):
             self._imgwriter.refresh = cycletime
 
         # Cycleloop starten
+        self._exit.clear()
         self._looprunning = True
         cycleinfo = helpermodule.Cycletools(self._imgwriter.refresh)
         ec = None