diff --git a/data/etc/revpipyload/revpipyload.conf b/data/etc/revpipyload/revpipyload.conf
index c1fa1eb..a518d5e 100644
--- a/data/etc/revpipyload/revpipyload.conf
+++ b/data/etc/revpipyload/revpipyload.conf
@@ -26,7 +26,7 @@ bindip = *
 [MQTT]
 mqtt = 0
 basetopic = revpi/data
-sendinterval = 15
+sendinterval = 10
 host = 
 port = 1883
 tls_set = 0
diff --git a/doc/mqttserver.html b/doc/mqttserver.html
index 841d5e1..b40c3af 100644
--- a/doc/mqttserver.html
+++ b/doc/mqttserver.html
@@ -53,6 +53,9 @@ Methods</h3>
 <td><a style="color:#0000FF" href="#MqttServer.__init__">MqttServer</a></td>
 <td>Init MqttServer class.</td>
 </tr><tr>
+<td><a style="color:#0000FF" href="#MqttServer._get_procimglength">_get_procimglength</a></td>
+<td>Ermittelt aus piCtory Konfiguraiton die laenge.</td>
+</tr><tr>
 <td><a style="color:#0000FF" href="#MqttServer._on_connect">_on_connect</a></td>
 <td>Verbindung zu MQTT Broker.</td>
 </tr><tr>
@@ -109,6 +112,17 @@ Optional Password fuer MQTT-Server
 <dd>
 MQTT ClientID, wenn leer automatisch random erzeugung
 </dd>
+</dl><a NAME="MqttServer._get_procimglength" ID="MqttServer._get_procimglength"></a>
+<h3 style="background-color:#FFFFFF;color:#FF0000">
+MqttServer._get_procimglength</h3>
+<b>_get_procimglength</b>(<i></i>)
+<p>
+Ermittelt aus piCtory Konfiguraiton die laenge.
+</p><dl>
+<dt>Returns:</dt>
+<dd>
+Laenge des Prozessabbilds <class 'int'>
+</dd>
 </dl><a NAME="MqttServer._on_connect" ID="MqttServer._on_connect"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 MqttServer._on_connect</h3>
diff --git a/eric-revpipyload.api b/eric-revpipyload.api
index 0a28dec..e9171e3 100644
--- a/eric-revpipyload.api
+++ b/eric-revpipyload.api
@@ -12,6 +12,7 @@ logsystem.PipeLogwriter.newlogfile?4()
 logsystem.PipeLogwriter.run?4()
 logsystem.PipeLogwriter.stop?4()
 logsystem.PipeLogwriter?1(logfilename)
+mqttserver.MqttServer._get_procimglength?5()
 mqttserver.MqttServer._on_connect?5(client, userdata, flags, rc)
 mqttserver.MqttServer._on_message?5(client, userdata, msg)
 mqttserver.MqttServer.newlogfile?4()
diff --git a/revpipyload/mqttserver.py b/revpipyload/mqttserver.py
index ae1c768..07417a1 100644
--- a/revpipyload/mqttserver.py
+++ b/revpipyload/mqttserver.py
@@ -7,6 +7,7 @@
 #
 """Stellt die MQTT Uebertragung fuer IoT-Zwecke bereit."""
 import proginit
+from json import load as jload
 from ssl import CERT_NONE
 from paho.mqtt.client import Client
 from threading import Thread, Event
@@ -39,9 +40,10 @@ class MqttServer(Thread):
         # Klassenvariablen
         self.__exit = False
         self._evt_data = Event()
-        self._sendinterval = sendinterval
         self._host = host
+        self._procimglength = self._get_procimglength()
         self._port = port
+        self._sendinterval = sendinterval
 
         # Topics konfigurieren
         self._mqtt_picontrol = "{}/picontrol".format(basetopic)
@@ -60,9 +62,45 @@ class MqttServer(Thread):
         self._mq.on_message = self._on_message
         # TODO: self._mq.on_disconnect = self._on_disconnect
 
+    def _get_procimglength(self):
+        """Ermittelt aus piCtory Konfiguraiton die laenge.
+        @return Laenge des Prozessabbilds <class 'int'>"""
+        try:
+            with open(proginit.pargs.configrsc, "r") as fh:
+                rsc = jload(fh)
+        except:
+            return 0
+
+        length = 0
+
+        # piCtory Config prüfen
+        if "Devices" not in rsc:
+            return 0
+
+        # Letzes piCtory Device laden
+        last_dev = rsc["Devices"].pop()
+        length += last_dev["offset"]
+
+        # bei mem beginnen, weil nur der höchste IO benötigt wird
+        for type_iom in ["mem", "out", "inp"]:
+            lst_iom = sorted(
+                last_dev[type_iom],
+                key=lambda x: int(x),
+                reverse=True
+            )
+
+            if len(lst_iom) > 0:
+                # Daten des letzen IOM auswerten
+                last_iom = last_dev[type_iom][str(lst_iom[0])]
+                bitlength = int(last_iom[2])
+                length += int(last_iom[3])
+                length += 1 if bitlength == 1 else int(bitlength / 8)
+                break
+
+        return length
+
     def _on_connect(self, client, userdata, flags, rc):
         """Verbindung zu MQTT Broker."""
-        print("Connect rc:", rc)
         if rc > 0:
             self.__mqttend = True
             raise RuntimeError("can not connect to mqtt server")
@@ -73,6 +111,7 @@ class MqttServer(Thread):
     def _on_message(self, client, userdata, msg):
         """Sendet piCtory Konfiguration."""
 
+        # piCtory Konfiguration senden
         with open(proginit.pargs.configrsc, "rb") as fh:
             client.publish(self._mqtt_pictory, fh.read())
 
@@ -105,8 +144,11 @@ class MqttServer(Thread):
         while not self.__exit:
             self._evt_data.clear()
 
-            # FIXME: Ganzes Prozessabbild übertragen
-            self._mq.publish(self._mqtt_picontrol, fh_proc.read(4096))
+            # Prozessabbild mit Daten übertragen
+            self._mq.publish(
+                self._mqtt_picontrol,
+                fh_proc.read(self._procimglength)
+            )
             fh_proc.seek(0)
 
             self._evt_data.wait(self._sendinterval)
diff --git a/revpipyload/plcsystem.py b/revpipyload/plcsystem.py
index 8bb778f..cd6de76 100644
--- a/revpipyload/plcsystem.py
+++ b/revpipyload/plcsystem.py
@@ -226,7 +226,12 @@ class RevPiPlc(Thread):
         # Prozess beenden
         count = 0
         proginit.logger.info("term plc program {}".format(self._program))
-        self._procplc.terminate()
+        try:
+            self._procplc.terminate()
+        except ProcessLookupError:
+            proginit.logger.error("plc program was terminated unexpectedly")
+            proginit.logger.debug("leave RevPiPlc.stop()")
+            return
 
         while self._procplc.poll() is None and count < 10:
             count += 1
diff --git a/revpipyload/revpipyload.py b/revpipyload/revpipyload.py
index a2b4628..d6f7dc2 100755
--- a/revpipyload/revpipyload.py
+++ b/revpipyload/revpipyload.py
@@ -32,7 +32,6 @@ begrenzt werden!
 """
 import gzip
 import logsystem
-import mqttserver
 import picontrolserver
 import plcsystem
 import proginit
@@ -402,7 +401,8 @@ class RevPiPyLoad():
         th_plc = None
         if self.mqtt:
             try:
-                th_plc = mqttserver.MqttServer(
+                from mqttserver import MqttServer
+                th_plc = MqttServer(
                     self.mqttbasetopic,
                     self.mqttsendinterval,
                     self.mqtthost,
@@ -413,6 +413,7 @@ class RevPiPyLoad():
                     self.mqttclient_id
                 )
             except:
+                # TODO: Fehlermeldung ausgeben bezüglich paho.mqtt
                 pass
 
         proginit.logger.debug("leave RevPiPyLoad._plcmqtt()")
@@ -553,8 +554,8 @@ class RevPiPyLoad():
             proginit.logger.info("start xmlrpc-server")
             self.xsrv.start()
 
-        if self.mqtt:
-            # MQTT Uebertragung starten
+        # MQTT Uebertragung starten
+        if self.mqtt and self.th_mqtt is not None:
             self.th_mqtt.start()
 
         if self.plcslave:
@@ -599,9 +600,9 @@ class RevPiPyLoad():
         proginit.logger.info("stopping revpipyload")
 
         # Alle Sub-Systeme beenden
+        self.stop_plcprogram()
         self.stop_plcmqtt()
         self.stop_plcslave()
-        self.stop_plcprogram()
         self.stop_xmlrpcserver()
 
         # Logreader schließen