diff --git a/doc/revpimodio2.device.html b/doc/revpimodio2.device.html
index 0753f3b..7927204 100644
--- a/doc/revpimodio2.device.html
+++ b/doc/revpimodio2.device.html
@@ -106,6 +106,9 @@ Class Methods</h3>
 Methods</h3>
 <table>
 <tr>
+<td><a style="color:#0000FF" href="#Connect.__setattr__">__setattr__</a></td>
+<td>Verhindert Ueberschreibung der LEDs.</td>
+</tr><tr>
 <td><a style="color:#0000FF" href="#Connect.__wdtoggle">__wdtoggle</a></td>
 <td>WD Ausgang alle 10 Sekunden automatisch toggeln.</td>
 </tr><tr>
@@ -130,7 +133,13 @@ Static Methods</h3>
 <table>
 <tr><td>None</td></tr>
 </table>
-<a NAME="Connect.__wdtoggle" ID="Connect.__wdtoggle"></a>
+<a NAME="Connect.__setattr__" ID="Connect.__setattr__"></a>
+<h3 style="background-color:#FFFFFF;color:#FF0000">
+Connect.__setattr__</h3>
+<b>__setattr__</b>(<i>key, value</i>)
+<p>
+Verhindert Ueberschreibung der LEDs.
+</p><a NAME="Connect.__wdtoggle" ID="Connect.__wdtoggle"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 Connect.__wdtoggle</h3>
 <b>__wdtoggle</b>(<i></i>)
@@ -227,6 +236,9 @@ Methods</h3>
 <td><a style="color:#0000FF" href="#Core.__errorlimit">__errorlimit</a></td>
 <td>Verwaltet das Schreiben der ErrorLimits.</td>
 </tr><tr>
+<td><a style="color:#0000FF" href="#Core.__setattr__">__setattr__</a></td>
+<td>Verhindert Ueberschreibung der LEDs.</td>
+</tr><tr>
 <td><a style="color:#0000FF" href="#Core._devconfigure">_devconfigure</a></td>
 <td>Core-Klasse vorbereiten.</td>
 </tr><tr>
@@ -306,7 +318,13 @@ Byte Slice vom ErrorLimit
 <dd>
 Aktuellen ErrorLimit oder None wenn nicht verfuegbar
 </dd>
-</dl><a NAME="Core._devconfigure" ID="Core._devconfigure"></a>
+</dl><a NAME="Core.__setattr__" ID="Core.__setattr__"></a>
+<h3 style="background-color:#FFFFFF;color:#FF0000">
+Core.__setattr__</h3>
+<b>__setattr__</b>(<i>key, value</i>)
+<p>
+Verhindert Ueberschreibung der LEDs.
+</p><a NAME="Core._devconfigure" ID="Core._devconfigure"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 Core._devconfigure</h3>
 <b>_devconfigure</b>(<i></i>)
diff --git a/revpimodio2/device.py b/revpimodio2/device.py
index a668c62..d87e4e7 100644
--- a/revpimodio2/device.py
+++ b/revpimodio2/device.py
@@ -494,6 +494,16 @@ class Core(Base):
         "_slc_temperature", "_slc_errorlimit1", "_slc_errorlimit2", \
         "_slc_frequency", "_slc_led", "a1green", "a1red", "a2green", "a2red"
 
+    def __setattr__(self, key, value):
+        """Verhindert Ueberschreibung der LEDs."""
+        if hasattr(self, key) and key in (
+                "a1green", "a1red", "a2green", "a2red"):
+            raise AttributeError(
+                "direct assignment is not supported - use .value Attribute"
+            )
+        else:
+            object.__setattr__(self, key, value)
+
     def _devconfigure(self):
         """Core-Klasse vorbereiten."""
 
@@ -767,6 +777,17 @@ class Connect(Core):
     __slots__ = "__evt_wdtoggle", "__th_wdtoggle", "a3green", "a3red", "wd", \
         "x2in", "x2out"
 
+    def __setattr__(self, key, value):
+        """Verhindert Ueberschreibung der LEDs."""
+        if hasattr(self, key) and key in (
+                "a1green", "a1red", "a2green", "a2red", "a3green", "a3red",
+                "wd", "x2in", "x2out"):
+            raise AttributeError(
+                "direct assignment is not supported - use .value Attribute"
+            )
+        else:
+            object.__setattr__(self, key, value)
+
     def __wdtoggle(self):
         """WD Ausgang alle 10 Sekunden automatisch toggeln."""
         while not self.__evt_wdtoggle.wait(10):
diff --git a/revpimodio2/helper.py b/revpimodio2/helper.py
index abb8bcc..ab00e1b 100644
--- a/revpimodio2/helper.py
+++ b/revpimodio2/helper.py
@@ -351,12 +351,13 @@ class ProcimgWriter(Thread):
                                 )
                         else:
                             # Verzögertes Event in dict einfügen
-                            tupfire = (
-                                regfunc, io_event._name, io_event.value
+                            tup_fire = (
+                                regfunc, io_event._name, io_event.value,
+                                io_event,
                             )
                             if regfunc.overwrite \
-                                    or tupfire not in self.__dict_delay:
-                                self.__dict_delay[tupfire] = ceil(
+                                    or tup_fire not in self.__dict_delay:
+                                self.__dict_delay[tup_fire] = ceil(
                                     regfunc.delay / 1000 / self._refresh
                                 )
             else:
@@ -374,12 +375,13 @@ class ProcimgWriter(Thread):
                             )
                     else:
                         # Verzögertes Event in dict einfügen
-                        tupfire = (
-                            regfunc, io_event._name, io_event.value
+                        tup_fire = (
+                            regfunc, io_event._name, io_event.value,
+                            io_event,
                         )
                         if regfunc.overwrite \
-                                or tupfire not in self.__dict_delay:
-                            self.__dict_delay[tupfire] = ceil(
+                                or tup_fire not in self.__dict_delay:
+                            self.__dict_delay[tup_fire] = ceil(
                                 regfunc.delay / 1000 / self._refresh
                             )
 
@@ -525,8 +527,7 @@ class ProcimgWriter(Thread):
                 if self.__eventwork:
                     for tup_fire in tuple(self.__dict_delay.keys()):
                         if tup_fire[0].overwrite and \
-                                getattr(self._modio.io, tup_fire[1]).value != \
-                                tup_fire[2]:
+                                tup_fire[3].value != tup_fire[2]:
                             del self.__dict_delay[tup_fire]
                         else:
                             self.__dict_delay[tup_fire] -= 1
diff --git a/revpimodio2/netio.py b/revpimodio2/netio.py
index d307d3d..ea00e8d 100644
--- a/revpimodio2/netio.py
+++ b/revpimodio2/netio.py
@@ -164,11 +164,12 @@ class NetFH(Thread):
             # Hashwerte empfangen
             byte_buff = bytearray()
             zero_byte = 0
-            while not self.__sockend.is_set() and zero_byte < 100 \
-                    and len(byte_buff) < recv_len:
+            while not self.__sockend.is_set() and len(byte_buff) < recv_len:
                 data = so.recv(recv_len)
                 if data == b'':
                     zero_byte += 1
+                    if zero_byte == 100:
+                        raise OSError("too many zero bytes on hash load")
                 byte_buff += data
 
             # Änderung an piCtory prüfen